CARRIER Package Units(both Units Combined) Manual L0811832
User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides
Open the PDF directly: View PDF 
.
Page Count: 38
| Download | |
| Open PDF In Browser | View PDF |
®
Turn to the Expertg
Installation
EQUIPMENT
OPERATION
OAT sensor must be field
Installation for more details.
EQUIPMENT
This Infinity
Interface.
TM
OPERATION
Instructions
HAZARD
installed.
See
Accessory
HAZARD
unit is designed for use with an Infinity User
NOTE:
Read the entire instruction manual before starting the
installation.
TABLE
OF CONTENTS
PAGE
SAFETY CONSIDERATIONS
.........................
2
INTRODUCTION
...................................
2
RECEIVING AND INSTALLATION .................
2-12
Check Equipment ..................................
2
Identify Unit ....................................
2
Inspect Shipment .................................
2
Provide Unit Support ...............................
2
Roof Curb ......................................
2
Slab Mount .....................................
2
Ground Mount ..................................
2
Provide Clearances .................................
7
Rig and Place Unit .................................
7
Inspection ......................................
8
Introduction .....................................
8
Use of Rigging Bracket ............................
8
Select and Install Ductwork ...........................
8
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge Units ..........................
9
Provide for Condensate Disposal ......................
9
Install Flue Hood ..................................
10
Install Gas Piping .................................
10
Install Electrical Connections ........................
11
High-Voltage Connections ........................
11
Routing Power Leads Into Unit .....................
11
Connecting Ground Lead to Ground Screw ...........
11
Routing Control Power Wires .....................
12
Accessory Installation ............................
12
Special Procedures for 208-v Operation ..............
12
PRE-START-UP
...................................
14
START-UP .....................................
15-27
Unit Start-Up and Troubleshooting
...................
15
Sequence of Operation ..........................
20-25
Check for Refrigerant Leaks .........................
26
Start-Up Adjustments ..............................
26
Checking Cooling and Heating Control Operation ......
26
Checking and Adjusting Refrigerant Charge ...........
26
A05307
Fig. 1 - Unit 48XT
Refrigerant Charge ..............................
26
No Charge .....................................
26
Low Charge Cooling .............................
26
To Use Cooling Charging Charts ....................
27
Non-Communicating
Emergency Cooling/Heating Mode .. 27
MAINTENANCE ................................
29-31
Air Filter ........................................
29
Indoor Fan and Motor ..............................
29
Combustion-Air Blower ............................
28
Burner Ignition ...................................
29
Main Burners ....................................
29
Inducer Pressure Switch ............................
30
Outdoor Coil, Indoor Coil, and Condensate Drain Pan .....
29
Outdoor Fan .....................................
30
Electrical Controls and Wiring .......................
30
Refrigerant Circuit .................................
30
Indoor Airflow ...................................
30
Metering Devices-TXV & AccuRater oR)Piston ...........
30
Pressure Switches .................................
30
Loss-of-Charge Switch ............................
31
High-Pressure Switches ............................
31
Copeland Scroll Compressor (Puron cR)Refrigerant) ........
31
Refrigerant System ................................
31
Refrigerant ....................................
31
Compressor Oil .................................
31
Servicing Systems on Roofs with Synthetic Materials ....
31
Liquid-Line Filter Drier ..........................
31
Puron (R-410A) Refrigerant Charging ...............
31
TROUBLESHOOTING
...........................
31-33
FINAL CHECKS ...................................
33
CARE AND MAINTENANCE
........................
33
START-UP CHECKLIST ............................
37
SAFETY
Installation
CONSIDERATIONS
and servicing
of this equipment
can be hazardous
due
to mechanical
and electrical
components.
Only trained and
qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance
flmctions such
as cleaning and replacing air filters. All other operations
must be
performed
by trained service personnel.
When working
on this
equipment,
observe
labels attached to
precautions
or shipped
in the literature, on tags, and on
with the unit and other safety
precautions
that may apply.
Follow all safety codes. Installation
must
be in compliance
with
local and national building
codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher
available. Read
these instructions
thoroughly
and follow all warnings or cautions
included in literature and attached to the unit.
Recognize
When
safety
information.
you see this symbol
This is the safety-alert
on the unit and in instructions
als, be alert to the potential
signal words:
DANGER,
for personal
WARNING,
symbol
/_.
or manu-
iniury. Understand
and CAUTION.
these
These
words are used with the safety-alert
symbol. DANGER
identifies
the most serious hazards which will result in severe personal iniury
or death. WARNING
signifies hazards which could result in personal iniury or death. CAUTION
is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used
result in enhanced installation,
to highlight
suggestions
reliability, or operation.
which
will
section
of these instructions.
See furnace
rating
Low
NOx
requirements
RECEIVING
plate.
apply
only
to
natural
gas
AND INSTALLATION
Check Equipment
IDENTIFY
UNIT
The unit model number
informative
plate. Check
INSPECT
SHIPMENT
and serial number are printed on the unit
this information
against shipping papers.
Inspect for shipping damage while unit is still on shipping pallet. If
unit appears to be damaged or is torn loose from its anchorage,
have it examined
by transportation
Forward
claim
papers
directly
inspectors
before removal.
transportation
company.
to
Manufacturer
is not responsible
for any damage incurred in transit.
Check all items against shipping
list. Immediately
notify the
nearest Carrier office if any item is missing. To prevent loss
damage, leave all parts in original packages until installation.
Provide
For
or
Unit Support
hurricane
tie downs,
contact
(Professional
Engineering)
ROOF CURB
distributor
Certificate,
for details
and PE
if required.
Install accessory roof curt) in accordance
with instructions
shipped
with curb (See Fig. 4). Install insulation,
cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT:
critical
The
for a water
gasketing
tight
of the
seal.
Install
with the roof curt). Improperly
Always install furnace to operate within the intended temperature
rise range with a duct system which has an external static pressure
within the allowable range, as specified in "Indoor Airflow Adjustments"
NOTE:
installations.
unit
to the roof
gasketing
applied
material
gasketing
curt) is
supplied
also can result in
air leaks and poor unit performance.
Curt) should be level to within 1/4 in. (6.35 mm) (See Fig. 2). This
is necessary for unit drain to function properly. Refer to accessory
roof curt) installation
instructions
for additional
information
as
required.
ELECTRICALSHOCK
Failure to follow
iniury or death.
HAZARD
this warning
could
result
in personal
Before installing or servicing system, always turn off main
power to system and tag.
There may be more than one
disconnect switch. Turn off accessory heater power switch if
MAXIMUM ALLOWABLE
DIFFERENCE in, (ram)
BC
AB
applicable.
1/4
1/4
(6.35)
AC
(6.35)
1/4 (6.35)
A07925
Fig. 2 - Unit Leveling
SLAB
UNIT
OPERATION
AND SAFETY
Failure to follow this warning
iniury or equipment damage.
Puron (R-410A)
standard
R-22
systems
systems.
equipment
or components
Ensure service equipment
could
HAZARD
result
operate at higher
DO NOT
use
MOUNT
Place the unit on a solid, level concrete
in personal
pressures than
R-22
service
on Puron (R-410A)
equipment.
is rated for Puron (R-410A).
RETLJRP
IIIIl o,_
_
packaged
HYBRID
HEAT®
unit
is a
combination
Category
I gas heating/electric
fully
heat
can be converted
to downflow
for rooftop applications.
other
regions
i
SUPPLY
\'\I
_
_--
o,_
_+"
IIII|
IIIII
ilil
_i
Z_ (
Illl
F_Z " _, _
IIIII
IIIII
IIIII
_
_i,_-'_._J
_ _ _ J_] ....
N
I/
"_
///
_L A'
)
/_
N%.q
/
//
of 4
IlllIIII
+ _' _
dill
dlII
_OPENtNG
t111
't [
_ II
lIII
II II
I!,l
ii
ii
IIII
IIII
II II
IIII
2"
++
(50.Smm)
/
EVAR
COIL
/
COND.
COIL
A07926
(NOx) emissions
requirements
of 40 nanograms/joule
or less as
shipped from the factory and must be installed in California Air
Management
Districts
or any
where a Low NOx rule exists.
\
_
(vertical)
Models with an N in the fifth position of the model number are
dedicated
Low NOx units designed
for California
installations.
These models meet the California
maximum
oxides of nitrogen
Quality
America
IY//F
III1| OPENINI
IIIIl
pump designed for outdoor installation
(See Fig. 1). Standard units
are shipped in a horizontal-discharge
configuration
for installation
on a ground-level
slat) or directly on the ground if local codes
permit. Standard units
discharge configurations
pad that is a minimum
in. (102 mm) thick with 2 in. (51 mm)
above grade. The slat)
should extend approximately
2 in. beyond the casing on all 4 sides
of the unit (See Fig. 3). Do not secure the unit to the slat) except
when required by local codes.
INTRODUCTION
The
48XT
self-contained
Tolerances
in North
GROUND
Fig. 3 - Slab Mounting
MOUNT
Detail
The unit may be installed either on a slab or placed directly on the
ground
if local codes permit. Place the unit on level ground
prepared with gravel for condensate
discharge.
ase
/
/
,,Screw.__._
(NOTE
/
A)
-_'l
*Gasketing
/
.._
r_ j
\
_
Flashing
I
Ill_l
field
supplied
Wood
_
II
JJU_ilt"_
Ro°f
II_::i!ll/I#
Roofing
material
U_
curb*
(field
Insulation
supphed)
I[
IL
field
supplied--
ll_ii![l
'_
/l_!_i:ll
\
nailer*
II_ Duotwork
_ill
I[ field supplied/
Roof
Curb for Small
Cabinet
Roof Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer
bracket
must
also
Note A: When unit mounting screw is used,
retainer bracket must also be used.
be used.
_E
Supply opening
(BxO)
+
G
\
F
\/
R/A
S/A
................................................................
_,
_Gask_tua_Ound"/_
Insulated
Gasket around
SuppoR
deck pan
Long
Suppo_
outer
edge
N
X_
Retu'nopening
(BXC)
A05308
UNIT
CATALOG
NUMBER
A
IN. (MM)
B
IN. (MM)
CPRFCURB006A00
8 (203)
11 (279)
16-1/2
(419)
28-3/4
(730)
30-3/8
(771)
44-5/16
(1126)
45-15/16
CPRFCURB007A00
14 (356)
11 (279)
16-1/2
(419)
28-3/4
(730)
30-3/8
(771)
44-5/16
(1126)
45-15/16
CPRFCURB008A00
8 (203)
16-3/16
(411)
17-3/8
(441)
40-1/4
(1022)
41-15/16
(1065)
44-7/16
(1129)
46-1/16
(1169)
CPRFCURB009A00
14 (356)
16-3/16
(411)
17-3/8
(441)
40-1/4
(1022)
41-15/16
(1065)
44-7/16
(1129)
46-1/16
(1169)
be used
as well.
SIZE
024-030
036-060
D
IN. (MM)
C
IN. (MM)
E
IN. (MM)
F
IN.(MM)
G
IN. (MM)
(1167)
(1167)
NOTES:
1. Roof
curb
2.
Seal
strip
3.
Roof
4.
Attach
5.
Insulated
d.
When
curb
must
must
is made
ductwork
panels:
unit
conditions.
be set up for unit
be applied,
of 1d-gauge
to curb
1-in.
mounting
This
screw
installed.
to unit
being
installed.
steel.
(flanges
(25 mm)
bracket
being
as required,
of duct
thick
is used
is available
rest on curb).
fiberglass
(see Note
through
1 lb. density.
A), a retainer
bracket
must
This
bracket
Micrometl.
Fig. 4 - Roof Curb
Dimensions
must
also be used when
required
by
code
for hurricane
or seismic
UNI
ELECTRICAL
CNARAC1ER{SIICS
UNIT
48X]0_4040
_08/230
48XTOSOOaO
208/230-160
48XTB30060
208/230
/
160
B
024040
941426
030040
10!/45¸8
O3006O
_0B/46
C
941426
3
0
871395
162/735
101/45
8
93/42¸2
_73/785
_0B/46
3
94/4_ R
_7S/19
UNT
EGNT
I
A i
I
438
468
104_9_4_
2_2,S 11092_7143
i
413
2_4 6 i ID92
RE_RED
CORNER WEJGNTLBS/NG
A
_YT
i LBS i
60
/
OB_
021i
CENTER OF GRAV]IY MM/N
$08,0_20 0_
508_0120_01
7143 0RI i
508 BIBD_O_
i
I
489,0_6
S_
489_011R_SI
i
485 01_5 31
z
i
4_7 0_7 6_
4_1 01 7,6_
i
4N7 01_7 61
CLEARANCESTO CO_EJJSTIBLEMATL.
_ILL;METERS [IN]
35B6 [IN 00]
50 BiB 001
355 6 [14 OR]
127 [0 501
914 4 136 OOI
lOP OF UN{1 ......................
DUCT S[BE OF UNII¸
SIDE O_POSITE DUETS
BOT_O_ OF UNI_ ................................
E_EC_RIC HEAT PANEL
...............
4
i
NF.C, RE_._REO_N_CE_
BETWEENUNITS, POWERENTRY SIDE ........................
UNIT AND UNGROUNDED
SURPACES, POWERENTRY S;DE .........
UNET AND BLOCK OR CONCRETEWALLS AND OTHER
GROUNDEDSURFACES, POWERENIRY S[I)E
............
M]LL_NE1Ei/S _]N]
10668
[4200]
9140
[36 50]
10668
[NBO0]
REQUIREDCLF.APJ_NCE
FOR 13PERA_ONAND SERW_CING
M]LL]MEIEHS {IN]
5140
[36 00]
914¸0 [36 OO]
EVAP COIL ACCESS SIDE ..................
ROWERENTRY S!DE ......................
IEXCERT !OR NEC REOU]REMENISI
UNIT TOP................................................
SIDE OPPOSITE DUCTS......................
D_C_ PANel........................
TOP VIEW
Ii93
_798
[31
8
9!NO
514¸0
304¸8
_MINiMUN DJSFANCESIF UN]l IS PLACED LESS THAN SON8 [i200)
FROMWALL
SYSTEM,THEN SYSTEM PERFORNANCEMAYBECOMPROMISED¸
_,
6 --_
441
FIELD EHTRY---_
SERVICE PORTS \
"
PULE LOUVER
]
570 3
[2245]
22 210 88]
d
BM
L42
[i
REIURN
SUPPLY
%e!
OPENING
CONTROL ENTRY
_92_!_4!il
s2R5
U285}
\
\--121{0 DO] N PT
GAS ENTRY
/
COMPRESSOR,BLOWER, GAS PAHTilIOH
_724
DRAIN 0 T E
o _DUCI
%
313¸0
11232]
1
68]
i
FULL LOUVER
347 B
z
y
{020]
_i!71
[4 63]
5505
[BI67]
[2 85]
249 6
{9 83]
& ELECTRICAL ACCESS PANEL
i226 3
[48281
83i O
13272}
LEFT SIDE VIEW
[5600]
[B6 001
FIB 00]_
FRONTVIEW
RIGHTSIDE VIEW
REARVIEW
A06609
Fig. 5 - 48XT024-030
Unit
Dimensions
.
T
48XT048130
48×T060090
48XT060115
I
228 211425(44
231811425(4498
208/230-1-60
208/23081860
208/230-1-68
514
522
538
233211933(4698
236 811933(46
2440 11933(4698
208/230-1-60
208/23081860
208/230-1-60
538
538
244011933(4698
244 01193 3(46
581
581
581
2636 ;2949(5098
263612949(5098
263 612949(50
208/230-1-60
208/23081860
48XT060130
I
503
511
CORNER MEIGHT LDS./HG+
k
6
C
- 80.5
13.171
103/46i
117/53]
941426
]89/857
O36O9O
i05/47_
118/535
96/43¸6
191/866
042060
113/51!
042090
i14/51
04889O
119/54¸(
89/40¸4
142/644i187/848
048115
119/54¸(
89/40¸4
142/644i187/848
04813O
_19/541
89/40¸4
142/644!187/848
060090
127/57_
93/42¸2
156/70
060115
i27/57_
93/42¸2
156/701
706/63
060130
827/57_
93/42¸2
156/701
705/038
81/36¸7
140/63
4216116
6}
421611661
553412101
553 412101
49531i9
5]
520 7(20 5?
520 7(20 5?
53981213}
4216116
6}
4216(1661
45721180)
98
4953(i951
495 3{19 5)
5398(213}
539 8(21 3)
4512(1801
4572118
01
98
553412101
5534{2101
5534(2101
50801200)
50801200}
5080(200)
44701176}
44701176)
44701176)
98
TO _lmilUI
mlL,
MILLIMETERS [iNN
DIJCI SIDE OT ONlY.........................................
SlOE OPPOSITE DUCTS.....................................
BOTTOM¢+ UNIT............................................
EL[CIRIC FI(AT PANEL.....................................
137/621i183/830
2
_
51186/84
4
mUmJ_
50+8 I2+OOI
355.6 114+001
1Z. 7 [01501
914+4 136+001
CLIMIW_m
BETWEENUNITS. POWERENTHT SlOE
UNit AND UNOMOUNOEO
SURFACES. POLEDENTRY SIDE ..........
UNIT AND BLOCKOR CONCRETEWALLS kNO OTHER
I 705/930
0
€IJNWI01
P0R OPilAII011
I
....................
SlO[
("Te_
P_(n
sUe_AC[S.
0
UOIIIRID
MILLIMETERS (lNI
10++,+ 142+00)
914.0 136+001
AND iMCIgO
MILLIMETERS llN]
914+0 136.001
914.0 (S6,o0)
[VAP+ COIL ACCESS SIDE ..................................
POWERENTRY $10[ ........................................
IEXCEPT FOR NEC REOUIREMENTSI
UNIT TOP...............................................
SlOE OPPOSITE OUCTS.....................................
DUCT PANEL
914+0 136.001
914.0 136.001
30e+ 8 112+001'
..............................................
TOP VIEW
R_N0[
G
l
1090.7
142+941
EI(LO
ENTRY'--',
117.1
14.Rll
t
44.3
______....
22+2(0+881 DIA+ HOLE
CONTROL ENTRY
28+611+131 DIN, H.O+ ____-_
FULL LOMVER
q
.
i
l
i
i
lr
114.t91
l
•
almmmililinnn
i
TC
402.0
I15+831
258 T
f
46,6
I1,841
52+6
12,Oll
142.2
15,601
EL[CTRICAL ACCESSPANEL
*122Ur3
148+281
SUPPLY
DUCT
OPENING
,
I
87.2
13.431
i
+ls,llilll,.P.,.
t+o.,D,---
RIOHTSIDEVIEW
i
_351+2
I1S+8SI
REARVEW
AO6598
Unit
Dimensions
I
rl
Ill.Ill
_351.2
_
1138811
FRONTVIEW
Fig. 6 - 48XT036-060
RETURN
O_T
llJ.+
14.631
/
Z
i
LEFT SIDEVIEW
i
___,l P'+LhIF-302R ]P;l:h,r-
COMPR[SSOM.6LOMER. GAS PARTITION +++_
--
°
11
12+841
1123+1
144,221
"1
"--1_-_3.1_
3.D
!--
I
T2r
I '°***°u+
I
i
•
1 .
19+010+ 751 N+P.T.
z 22.010.871D((P
i
POWERENTRY
lULL LOUVER
.
'MINIMUM DISTANCES:IT+ UNit IS PLACED LESS THAN 30,1+8 112+001 FROMMALL
SYSTEM.THEN SYSTEM PER++OMNNNCE
MAYO[ COMPROMISED+
+,+++o
I4?+ooI
SERVICE POMTS___,__
Z
520 7(20 5}
52071205)
0
036060
] 82/37
N
CENTER 0+" GRAVITY MM/IN
Y
553 412101
5534(2101
........................
173+3
16,821
m
X
98
142+00)
48XT042090
48×T048090
48XT048115
UNIT HEIGHT
"A"
208/230
1 60
208/230-1860
0_*8
48XT036060
48)cr036090
48XT042060
406,6
[16,01]
UNIT MT.
LOS+
K6+
[LECTRICAL
CHARACTERISTICS
UNIF
86+0
13.381
-+,,I
Table
UNIT SIZE
NOMINAL
COOLING
Data - Unit 48XT
030040
030060
036060
036090
(ton)
2
2-1/2
2-1/2
3
3
(Btu)
40,000
438
199
40,000
468
212
60,000
473
215
60,000
503
228
CAPACITY
NOMINAL HEATING CAPACITY
OPERATING WEIGHT (Ib)
(kg)
1 - Physical
024040
COMPRESSORS
Quantity
Two-Stage
1
REFRIGERANT: PURON (R-410A)
Quantity (Ib)
(kg)
EXPANSION DEVICE- HEATING
Orifice OD (in.) -
Left
Orifice OD (in.) - Right
EXPANSION DEVICE-COOLING
Size
Part Number
OUTDOOR COIL
Rows...Fins/in,
Face Area (sq ft)
OUTDOOR FAN
Nominal Cfm
Diameter (in.)
(ram)
Motor Hp (Rpm)
INDOOR COIL
Rows...Fins/in,
Face Area (sq ft)
INDOOR FAN
Nominal
Airflow
042090
3-1/2
3-1/2
90,000
511
232
60,000
514
233
90,000
522
237
9.7
4.4
14.0
6.4
14.0
6.4
Scroll
10.3
4.7
11.5
5.2
11.5
5.2
0.042
0.038
0.038
9.7
4.4
0.035
0.035
0.040
0.040
N/A
0.038
0.038
0.035
0.035
0.042
0.042
AccuRater
2 Ton
3 Ton
3 Ton
TXV
3 Ton
3 Ton
4 Ton
4 Ton
EA36YD129
EA36YD139
EA36YD139
EA36YD139
EA36YD139
EA36YD149
EA36YD149
2...21
13.6
2...21
15.3
2...21
15.3
2...21
17.5
2...21
17.5
2...21
19.4
2...21
19.4
2700
22
559
1/8 (825)
2700
22
559
1/8 (825)
2700
22
559
1/8 (825)
2800
22
559
1/8 (825)
2800
22
559
1/8 (825)
2800
22
559
1/8 (825)
2800
22
559
1/8 (825)
3...17
3.7
3...17
3.7
3...17
3.7
3...17
4.7
3...17
4.7
3...17
4.7
3...17
4.7
(Cfm)
Comfort
Variable
Efficiency
Max
Furnace (gas ht.) airflow-Low
Furnace (gas ht.) airflow-High
Stage
Stage
Size (in.)
(ram)
Motor HP (RPM)
FURNACE SECTION*
Burner Orifice No. (Qty._Drill Size)
Natural Gas
HIGH-PRESSURE
Cut-out
Reset (Auto)
042060
SWITCH
based on Comfort
Rollback(see
Userlnterfaceinstructionsfor
moreinformation).
700
875
875
1050
1050
1225
1225
800
1000
1000
1200
1200
1400
1400
475
475
727
745
875
745
875
844
844
1120
1120
1410
1120
1410
10x10
254x254
10x10
254x254
10x10
254x254
11x10
279x254
11x10
279x254
11x10
279x254
11x10
279x254
1/2
1/2
1/2
3/4
3/4
3/4
3/4
2...44
2...44
3...44
3...44
3...38
3...44
3...38
(peig)
670 ±10
470 ± 25
HIGH-PRESSURE SWITCH 2 (psig)
(Compressor Solenoid)
Cut-out
Reset (Auto)
565 ± 15
455 ± 15
LOSS-OF-CHARGE
/
LOW- PRESSURE SWITCH
(Liquid Line) (psig)
Cut-out
Reset (auto)
RETURN-AIR
FILTERS Throwaway
(in.)€
(mm)
Continued next page.
23 ± 5
55 ± 5
20x24x1
508x610x25
24x30x1
610x762x25
24x36x1
610x914x25
Table
UNIT
SIZE
NOMINAL
COOLING
NOMINAL
HEATING
OPERATING
CAPACITY
WEIGHT
(Btu)
Data Con't
- Unit 48XT
048115
048130
060090
060115
4
4
4
5
5
(ton)
CAPACITY
1--Physical
048090
060130
5
90,000
115,000
130,000
90,000
115,000
130,000
538
244
538
244
538
244
581
264
581
264
581
264
16.0
7.3
16.0
7.3
16.0
7.3
(Ib)
(kg)
COMPRESSORS
Two-Stage
Quantity
Scroll
1
REFRIGERANT:
Quantity
(Ib)
(kg)
EXPANSION
PURON
(R-410A)
15.5
7.0
15.5
7.0
15.5
7.0
DEVICE-HEATING
AccuRater
Orifice
OD (in.) - Left
0.038
0.038
0.038
0.046
0.046
0.046
Orifice
OD (in.) - Right
0.046
0.046
0.046
0.046
0.046
0.046
EXPANSION
DEVICE-COOLING
TXV
Size
4 Ton
Part Number
4 Ton
EA36YD149
OUTDOOR
FAN
Nominal Cfm
4 Ton
EA36YD149
5 Ton
EA36YD149
5 Ton
EA36YD159
5 Ton
EA36YD159
EA36YD159
(in.)
(mm)
Motor Hp (Rpm)
3300
22
559
3300
22
559
3300
22
559
3300
22
559
3300
22
559
3300
22
559
1/4 (1100)
1/4 (1100)
1/4 (1100)
1/3 (1110)
1/3 (1110)
1/3 (1110)
OUTDOOR COIL
Rows... Fins/in.
Face Area (sq ft)
2...21
19.4
2...21
19.4
2...21
19.4
2...21
23.3
2...21
23.3
2...21
23.3
INDOOR COIL
Rows... Fins/in.
Face Area (sq ft)
3...17
5.7
3...17
5.7
3...17
5.7
4...17
5.7
4...17
5.7
4...17
5.7
Diameter
INDOOR FAN
Nominal Airflow
(Cfm)
Comfort
Variable
based on Comfort
Rol! back
(see User Interface
instructions
for more
information).
Efficiency
1400
1400
1400
1750
1750
1750
Max
1600
1600
1600
2000
2000
2000
815
1215
1255
845
1215
1255
1385
1885
1875
1300
1910
1920
11x10
279x254
11x10
279x254
11x10
279x254
11x10
279x254
11x10
279x254
11x10
279x254
3/4
3/4
3/4
1
3...38
3...33
3...31
3...38
Furnace
(gas hr.) airflow-Low
Furnace
(gas hr.) airflow-High
Stage
Stage
Size in.
(ram)
Motor HP (RPM)
FURNACE SECTION*
Burner Orifice No, (Qty,,,Drill
Natural Gas
HIGH-PRESSURE
Cut-out
Reset
SWITCH
3...33
3...31
(peig)
670 ±10
470 ± 25
2 (peig)
565 ± 15
455 ± 15
LOSS-OF-CHARGE
/
LOW-PRESSURE
SWITCH
(Liquid Line) (psig)
Cut-out
23 ± 5
55 ± 5
(auto)
RETURN-AIR
1
Size)
(Auto)
HIGH-PRESSURE
SWITCH
(Compressor Solenoid)
Cut-out
Reset (Auto)
Reset
1
FILTERS
Throwaway
24x36x1
610x914x25
(in.)t
(ram)
*Based on altitude of 0 to 2000 ft (0-610 m).
1-Recommended filter sizes for field-installed
air filter grilles mounted on the wall or ceiling of the conditioned structure. Required filter sizes shown are based on
the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ft/minute for throwaway type or 450
ft/minute for high-capacity
type. Air filter pressure drop for non-standard
filters must not exceed 0.08 in. wc.
Provide
Clearances
The required
6. Adequate
minimum
ventilation
IMPORTANT:
service clearances are shown in Fig. 5 and
and outdoor air must be provided.
The
at
either
Do
the
detrimental
Do
corner
should
be at least
and runoff
levels.
or under
an overhead
obstruction.
The minimum
under a partial overhang (such as a normal house
in, above the unit top. The maximum
horizontal
partial overhang
must not exceed
48 in. (1219 mm).
clearance
overhang)
extension
is 48
of a
not
roof
carpeting
restrict
place
will
the unit
damage
or
other
outdoor
inlet
to compressor
outdoor fan draws air through the outdoor coil and discharges it
through the top fan grille. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
or
not
outdoor-air
or
airflow.
An
fan
discharge
the
air restriction
may
be
life.
where
or
water,
ice,
the
unit.
flood
combustible
or snow
from
Do
install
materials.
not
an overhang
the
unit
Slab-mounted
on
units
4 in. (102 mm) above
the highest
expected
Do not use unit if it has been under
water.
water
Rig and Place Unit
Rigging
many
structures,
and
reasons
etc.).
handling
due
of
to
the
this
equipment
installation
can
location
be
hazardous
(roofs,
for
elevated
Only
trained, qualified
should
handle
When
working
crane
operators
and ground
support
staff
3. Attach
and install this equipment.
with
this equipment,
observe
precautions
each of the 4 metal rigging
rain lip (See Fig. 7). Use
above to secure the brackets
in the
brackets
the screws
to the unit.
under
the panel
removed
in step 2
literature, on tags, stickers, and labels attached to the equipment,
and any other safety precautions
that might apply.
Training for operators of the lifting
not be limited to, the following:
equipment
should
include,
PROPERTY
1. Application
of the lifter to the load, and adjustment
lifts to adapt to various sizes or kinds of loads.
2. Instruction
in any special
operation
all applicable
safety
codes.
Wear
of the
safety
of the lifting
shoes
Failure
DAMAGE
to follow
injury/death
or precaution.
3. Condition
of the load as it relates to operation
kit, such as balance, temperature,
etc.
Follow
gloves.
but
Rigging
adequate
HAZARD
this
warning
or property
damage.
bracket
lifting.
MUST
could
be under
result
the rain
in personal
lip to provide
and work
INSPECTION
PROPERTY
Prior to initial
use, and at monthly
intervals,
all rigging
DAMAGE
HAZARD
brackets
and straps should be visually inspected
for any damage,
of wear, structural
deformation,
or cracks. Particular
evidence
attention
should be paid to excessive wear at hoist hooking points and load
support areas. Brackets or straps showing any kind of wear in these
areas must not be used and should be discarded.
Failure to follow this warning
injury/death
or property damage.
2. Attach
could
result
in personal
opposite
weight
Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect
switch.
Turn
off accessory
heater
power
switch
if
applicable. Tag disconnect
switch with a suitable warning
label.
straps
FALLING
approximately
30 degrees
from
of equal
length
to the rigging
brackets
of the unit (See Fig. 7).
3. Attach a clevis of sufficient strength in the middle of the
straps. Adjust the clevis location to ensure unit is lifted level
with the ground.
4. After unit is securely
in place detach rigging
screws,
and
rigging
Failure to follow this warning
iniury/death
or property damage.
could
straps. Remove
brackets
then
reinstall
HAZARD
Failure to follow
iniury or death.
this warning
Never stand beneath
rigged
could
result
UNIT
in personal
units or lift over people.
FALLING
HAZARD
result
in personal
When straps are taut, the clevis should be a minimum
in. (914 mm) above the unit top cover.
INTRODUCTION
The lifting/rigging
bracket
is engineered
installed only on Small Packaged Products.
This bracket is to be used to rig/lift
roofs or other elevated structures.
and
designed
to
be
After
a Small Packaged
Product
of 36
onto
the unit is placed
on the roof curb or mounting
pad, remove
the top crating.
Select and Install
Ductwork
The design
and installation
of the duct system
must be
accordance
with the standards
of the NFPA for installation
non-residence
PROPERTY
DAMAGE
HAZARD
Failure to follow
this warning
iniury/death
or property damage.
could
result
in personal
Rigging brackets
for one unit use only. When removing
unit at the end of its useful life, use a new set of brackets.
USE OF RIGGING
Field
Installation
remove
a
Bracket
bar of sufficient
4 screws in unit corner posts.
length
conditioning
type,
Select and size ductwork,
supply-air
When
carton. Leave
top
shipping skid on the unit for use as a spreader bar to prevent
the rigging straps from damaging the unit. If the skid is not
2. Remove
air
The unit has duct flanges
on the side of the unit.
unit from shipping
available, use a spreader
the unit from damage.
type
NFPA 90A or residence
ordinances.
NFPA
and
90B
ventilating
and/or
registers,
local
in
of
systems,
codes
and return
and
air grilles
according
to
ASHRAE
(American
Society
of
Heating,
Refrigeration,
and Air Conditioning
Engineers) recommendations.
BRACKET
of Ri_in_
1. If applicable,
at
ends of the unit. Be sure straps are rated to hold the
corner posts,
screws.
UNIT
down
the corner posts.
HAZARD
this warning
in personal
of Unit
1. Bend top of brackets
Failure to follow
injury or death.
result
Do not strip screws when re-securing
the unit. If a screw is
stripped,
replace the stripped one with a larger diameter
screw (included).
Riu_inu/Liftinu
ELECTRICALSHOCK
could
to protect
designing
on the supply-
and installing
ductwork,
and return-air
consider
openings
the following:
1. All units should have field-supplied
filters or accessory
filter rack installed
in the return-air
side of the unit.
Recommended
sizes for filters are shown in Table 1.
2. Avoid
change
abrupt
duct
size
increases
in duct size adversely
and reductions.
affects air performance.
Abrupt
A
j
B
.....
j
jr
z
SEE DETAIL
MINIMUM
HEIGHT:
36-in.
(914
ram)
A/
D
ACCESS
C
PANEL
A06296
A06298
CABINET
RIGGING WEIGHT
MODEL
Small
48XT-
024
Ib
462
Small
48XT-
030
492
223
48XT-036
533
242
48XT-042
48XT- 048
544
560
247
254
48XT-060
603
274
Large
kg
2t0
NOTE: See dimensional drawing for corner weight distribution. Corner
weights shown on drawing are based on unit-only
weights and do not
include packaging.
Fig.
7 -
Suggested
Rigging
CONVERTING
HORIZONTAL
DOWNFLOW
ELECTRICAL
OPERATION
Failure to follow
iniury or death.
unit to prevent
ensure weather
installed,
connector
Use
flexible
flexible
duct is used,
insert
resistant
duct connector
connectors
of vibration.
airtight
seal.
use fireproof canvas
between
ductwork
between
ductwork
and
Use suitable gaskets
When electric heat
sleeve
(or sheet metal sleeve)
inside
duct.
must extend
to
is
NOTE:
24-in.
for max possible
air flow (See Table 1).
4. Seal, insulate,
and weatherproof
all external
ductwork.
and Air Conditioning
Contractors
5. Secure
all ducts
to building
and vibration-isolate
duct
according to good construction
structure.
supply
in
weatherproof,
wall
or
roof
with
See pre-sale
NOTE:
electrical
side
duct
These panels
knockout.
3. Use a screwdriver
bottom
4. Ensure
covers
to
and hammer
access
bottom
tag before
return
and
air openings
for Condensate
NOTE:
Ensure
to remove
dispose
the panels
to an
in the
are in place
to block
off the
methods
comply
(See Fig. 8).
Disposal
that condensate-water
restrictions,
with tabs sinfilar
unit base.
the side duct covers
Provide
units
accessory
and install lockout
are held in place
of the composite
horizontal
The
side duct covers,
literature.
knockouts.
with local codes,
Flash,
openings
practices.
residential
are required.
2. Remove
Seal,
Association
for
could result in personal
1. Open all electrical disconnects
starting any service work.
insulate and cover with a vapor barrier all ductwork
passing
through conditioned
spaces. Follow latest Sheet Metal and
Air
Conditioning
Contractors
National
Association
(ACCA)
minimum
installation
standards
heating and air conditioning
systems.
If unit is not equipped
duct covers
Heat
3. Size ductwork
HAZARD
Before installing or servicing system, always turn off main
power to system and tag. There may be more than one
disconnect switch. Turn off accessory heater power switch if
applicable.
(or similar heat resistant material)
and unit discharge
connection.
If
a sheet metal
SHOCK
Failure to follow this warning
iniury or death.
(610 ram) from electric heater element.
(SMACNA)
TO
could result in personal
ELECTRICAL
transmission
tight and
UNITS
UNITS
HAZARD
this warning
For vertical supply and return units, tools or parts could
drop into ductwork, therefore, install a 90 degree turn in the
return ductwork between the unit and the conditioned space.
If a 90 degree elbow cannot be installed, then a grille of
sufficient strength and density should be installed to prevent
objects from falling into the conditioned space. Units with
electric heaters require 90 degree elbow in supply duct.
IMPORTANT:
DISCHARGE
(VERTICAL) DISCHARGE
disposal
and practices.
of condensate
through
a 3/4
-in.
NPT female
fitting that exits on the compressor
end of the unit. Condensate
water can be drained directly onto the roof in rooftop installations
(where
pernfitted)
installations.
Install
or onto a gravel
apron
in ground
level
a field-supplied
condensate
trap at end of
condensate
connection
the outlet
drain-pan
of the trap
condensate
to ensure
proper
drainage.
Make
sure that
is at least 1 in. (25 ram) lower than the
connection
to prevent
the pan from
overflowing.
Prime
the
trap with water. When
using a gravel
apron,
1" (25 mm) MIN
_L
make sure it slopes away from the unit.
If the installation
requires
draining
the condensate
TRAP
water away from
F-__
OUTLET
mm,
M,N.
the unit, install
a field-supplied
2-in.
(51 ram) trap at the
condensate
connection
to ensure proper drainage. Condensate
trap
is available
as an accessory
or is field-supplied.
Make
sure that the
A08001
outlet of the trap is at least 1 in. (25 ram) lower than the unit
drain-pan
condensate
connection
to prevent
the pan from
overflowing.
Connect
a drain
trough
using
a minimum
of
field-supplied
3/4 -in. PVC or field-supplied
3/4 -in. copper pipe
at outlet
undersize
Fig. 9 - Condensate
Install
The
end of the 2 -in. (51 ram) trap (See Fig. 9). Do not
the tube. Pitch the drain trough downward at a slope of at
gas
NSCNGPIC
MONOXIDE
POISONING
this warning
HAZARD
in
could
result
in personal
A
and with
l/8-in.
When
must
conform
the National
Fuel
with
local
Gas Code
building
(NFGC),
codes
NPT
NFPA
54
on flue panel.
Orient
the
access
hole
to the l/2-in.
Do
not
use
cast-iron
pipe.
It
is
Place flue
screw holes
hood
assembly
over
plugged
shutoff
installing
tapping,
accessible
for
test
gauge
of the gas
of manual
valve.
the gas supply
line, observe
Refer to the NFPA
local codes
54/ANSI
pertaining
Z223.1-2006
(in Canada, CAN/CGA
B149.1).
NOTE:
In the state of Massachusetts:
1. Gas supply connections
plumber or gas fitter.
2. When
2. Remove flue hood from shipping location (inside the return
section of the blower compartment-See
Fig. 8). Remove the
return duct cover to locate the flue hood. Remove
two
panel.
through
to the unit is made
be installed immediately
upstream
to the gas valve and downstream
to gas pipe installations.
/ANSI Z223.1-2006
(in Canada, CAN/CSA
B149.1,
and
B149.2)
latest revision.
Refer to provincial
and local
plumbing
or wastewater
codes and other applicable
local
codes.
screws
Canada.
connection,
nmst
supply connection
as follows:
installation
the unit
for 0.5 in. wc n_axinmm pressure
drop. Never use pipe
than the l/2-in. FPT gas inlet on the unit gas valve.
equipment
1. This
enters
For natural gas applications, the gas pressure at unit gas connection
must not be less than 4.0 in. wc or greater than 13 in. wc while the
unit is operating.
For propane
applications,
refer to propane
conversion
kit instructions.
The venting system is designed to ensure proper venting.
The flue hood assembly must be installed as indicated in
this section of the unit installation instructions.
Install the flue hood
pipe
recommended
that a black iron pipe is used. Check the local utility
for recommendations
concerning
existing lines. Size gas supply
piping
smaller
Failure to follow
iniury or death.
supply
Install a gas supply line that runs to the heating section. Refer to
Table 2 and the current edition of NFGC in the U.S. and the current
Install Flue Hood
CARBON
Gas Piping
provided.
The gas connection
FPT gas inlet on the gas valve.
least 1 in. (25 ram) for every 10 ft (3 m) of horizontal run. Be sure
to check the drain trough for leaks. Prime the trap at the beginning
of the cooling season start-up.
Trap
flexible
MUST
connectors
are used,
shall not exceed 36 inches
3. When
lever
handle
in flue hood with holes in the flue
type manual
4. The use of copper
panel.
by a licensed
the nmxinmm
length
(915 ram).
are used, they shall be T-handle
flue
be performed
tubing
equipment
shutoff
valves
valves.
for gas piping
is NOT
approved
by the state of Massachusetts.
3. Secure flue hood to flue panel by inserting
the top and the bottom
a single
screw on
In the absence
of the hood.
pertinent
of local
building
codes,
adhere
to the following
recommendations:
1. Avoid
low spots in long runs of pipe. Grade all pipe 1/4 in.
for every
horizontal
heating
2. Protect
thermal
15 ft (4.6 m) of length to prevent traps. Grade
runs downward
to risers. Use risers to connect
section
and to meter.
all segments
damage.
all
to
of piping
Support
system
all piping
against
physical
with appropriate
and
straps,
hangers, etc. Use a minimum of one hanger every 6 ft (1.8
m).
For
pipe
sizes
larger
than
1/2
in.,
follow
recommendations
of national codes.
Supply
Duct
Cover
A06320
Fig. 8 - 48XT
with Duct Covers
On
Table
NOMINAL
IRON PIPE
INTERNAL
DIAMETER
2 - Maximum
Gas Flow Capacity*
LENGTH
70
10
20
30
40
50
60
(6.1)
(9.1)
(12.1)
(15.2)
(18.3)
OF PIPE ft (m)t
80
SIZE (IN.)
(IN.)
(3.0)
(21.3)
(24.4)
1/2
.622
175
120
97
62
73
66
61
57
3/4
.624
360
250
200
170
151
138
125
118
1
1.049
680
465
375
320
285
260
240
220
90
100
125
150
175
200
(27.4)
(30.5)
(38.1)
(45.7)
(53.3)
(61.0)
53
50
44
40
110
103
93
64
77
72
205
195
175
160
145
135
1-1/4
1.380
1400
950
770
600
580
530
490
460
430
400
360
325
300
280
1 - 1/2
1.610
2100
1460
1180
990
900
810
750
690
650
620
550
500
460
430
*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5-in.
NFPA 54/ANSI Z223,1.
1- This length includes an ordinary
number
of fittings.
10
wc (based on a 0.60 specific gravity gas). Refer to Table,
been completed.
IN
made
specified
Install
Use a commercially
specifically
for the
by local codes
Electrical
detection
available
of leaks
soap solution
(or method
and/or regulations).
Connections
TEE
ELECTRICAL
_-_
Failure to follow
iniury or death.
NIPPLE
C99020
Fig. 10 - Sediment
Trap
sparingly
and only to
pipe connections.
Use
only pipe dope that is resistant
to action of liquefied
petroleum
gases as specified by local and/or national codes.
Never use Teflon
4. Install sediment
Fig. 10). This
condensate.
5. Install
external,
pipe within
to heating section (See
as a trap for dirt and
manual
main
shutoff
6 ft (1.8 m) of heating
valve in
section.
6. Install ground-joint
union close to heating section
unit manual shutoff and external
manual main
valve.
Protection
Electrical
NOTE:
piping
between
shut off
HIGH-VOLTAGE
Pressure
disconnected
systems
unit
the gas valve
piping
system
heating
by closing
slightly
opening
the
system
during
at pressures
nmst
external
piping
the testing
amps (ampacity)
Operation
nmst
from
manual
shutoff
valve
and
HAZARD
a gas line into a combustion
test for gas leaks with an open flame.
available
soap solution
wrench
to avoid
chamber.
Never
for the detection
constitutes
abuse
and
affect warranty.
COMPONENT
DAMAGE
HAZARD
5. Do not damage internal components when drilling
through any panel to mount electrical hardware, conduit,
etc.
of leaks to check all connections.
• Use proper
line voltage
that could
3. Be sure that high-voltage
power to unit is within
operating voltage range indicated on unit rating plate.
4. Insulate low-voltage wires for highest voltage contained
within conduit when low-voltage control wires are in
same conduit as high-voltage wires.
Use a commercially
made specifically
on the unit over
Failure to follow this caution may result in damage to the
unit being installed.
1. Make all electrical connections in accordance with NEC
NFPA 70 (latest edition) and local electrical codes
governing
such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.
2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit. DO
NOT USE ALUMINUM WIRE.
the gas piping
gas controls.
• Never purge
may be mounted
of unit on improper
UNIT
test the
union.
gas pipe to unit using a backup
disconnect
inlet hole (See Fig. 5 and 6).
be
Failure to follow this warning could result in fire, explosion,
personal injury, death and/or property damage.
damaging
for wire sizing.
field-supplied
may cause unit damage
equal to or less than 0.5 psig.
main
a
electrical
service
with
switch mounted at, or within
sight from, the unit. Refer to the unit rating plate, NEC and local
codes for maximum
fuse/circuit
breaker size and minimum
circuit
of the piping
of 0.5 psig. Pressure
be isolated
the ground-joint
OR EXPLOSION
• Connect
in personal
after the gas supply
The supply
is in excess
section
system
FIRE
to the gas valve.
when test pressure
gas supply
The
test the gas supply
from
result
CONNECTIONS
The
unit
must
have
a separate
field-supplied,
waterproof disconnect
The
test all gas piping in accordance
with local and
plumbing
and gas codes before connecting
piping
is connected
could
Association
(latest edition) (in Canada, Canadian
Code CSA C22.1) and local electrical codes.
the high-voltage
7. Pressure
national
to unit.
warning
tape.
trap in riser leading
drip leg functions
an accessible,
gas supply
this
HAZARD
The unit cabinet must have an uninterrupted,
unbroken
electrical ground. This ground may consist of an electrical
wire connected
to the unit ground
screw in the control
compartment,
or conduit
approved
for electrical
ground
when
installed
in accordance
with
NEC,
NFPA
70
American
National
Standards
Institute/National
Fire
CAP
3. Apply joint compound
(pipe dope)
male threads of joint when making
SHOCK
length of pipe to avoid stress on gas control
manifold.
• If a flexible
connector
having jurisdiction,
furnace
gas valve and extend
outside furnace
• If codes
connector.
serviced
is required
by authority
a nfininmm
ROUTING
at
connector,
Do not use a connector
of 2 in. (51 ram)
which has previously
single-phase
gas appliance.
gas
leaks
at
the
field-installed
gas lines after all piping connections
LEADS
INTO
UNIT
conduit ternfination
at the duct panel must be watertight.
Run the
high-voltage
leads through
the power
entry knockout
on the
power entry side panel. See Fig. 5 and 6 for location and size. For
always use a new
units, connect
CONNECTING
Connect
8. Check
for
factory-installed
POWER
Use only copper wire between
disconnect
and unit. The high
voltage leads should be in a conduit until they enter the duct panel;
casing.
allow a flexible
another
or allowed
black iron pipe shall be installed
and
have
the ground
the control
11
GROUND
leads to the black and yellow
LEAD
TO GROUND
lead to the chassis
plate near the inducer
switch
wires.
SCREW
using the ground
(See Fig. 13).
screw on
ROUTING
CONTROL
POWER
WIRES
Fordetailed
instruction
onthe low voltage connections
Interface
(UI), refer to the UI installation
The
to the User
guide.
Form a drip-loop
with the control leads before routing them into
the unit. Route the low voltage control leads through grommeted,
low-voltage
hole provided into unit (See Fig. 5 and 6). Connect
user interface leads to unit control power leads as shown in Fig. 14.
The unit
including
transformer
accessory
supplies
electrical
24-v power for complete
heater. A fuse
is provided
system
in the
OAT input
system
level
NOTE:
Mis-wiring
Infinity
no
control
reading
B.
Humidifier
is 208-v,
Procedures
The
furnace
as
described
in
Special
The furnace board is fused by a board-mounted
automotive
fuse
placed in series with transformer
SEC1 and R circuit, The C circuit
of transformer
circuit is referenced
to chassis ground through
a
printed circuit run at SEC2
be sure
control
board
factory-installed
ACCESSORY
A. Outdoor
and gas valve grounding wire. Check to
is mounted
securely
using
both
screws.
Air Thermistor
When
OPERATION
appear
on
for
User
If the thermistor
at UI.
Re-wire
damage
is wired
thermistor
to either
incorrectly,
correctly
for
is provided
for
Connections
control
commanded
Electronic
sensor
The installation
of an outdoor temperature
sensor using the
Infinity
control board OAT terminals
is required.
Many
infinity features (auto humidity
control, comfort rollback,
etc.) will be lost if the OAT is not connected.
For detailed
mounting
instructions
for the OAT sensor,
please refer to TSTATXXSEN01-B
installation instructions
(catalog no. 63TS-TAI3);
Procedures
1 through 3.
data
display
OAT inputs will not cause
board
terminal
marked
HUM
of a humidifier.
humidity.
to operate
humidifier,
No
the unit
humidistat
control
is
will
Air Cleaner
Air Cleaner
Control Board (EAC-I
used to power a 230V
HAZARD
temperature
energize the HUM output to turn humidifier on and de-energize
HUM
output
to turn humidifier
off. Wire HUM
and COM
terminals directly to humidifier as shown in Fig. 14.
installed
separately
EQUIPMENT
outdoor
temperature
operation.
Electronic
(OAT)
for
low voltage (24-vac)
control
required as UI monitors indoor
C.
INSTALLATION
and
or thermistor.
will
24-v
circuit
as a protection
device
(See Fig. 16 and 17).
Transformer
is factory wired for 230-v operation. If supply voltage
primary
section.
to supply
Interface (UI). Using two wires of the field-supplied
thermostat
wire cable, wire the ends of the two black OAT pigtails. Wire the
opposite ends of these two wires to the OAT provided with the UI.
There is no polarity to be observed.
normal
rewire transformer
for 208-v Operation
is used
functions
terminals
per the EAC
to a standard
to control
SPECIAL
installation
instructions
II5V
or 230V outlet
operation
FOR 208-V
switch
the Infinity
and connected
with an airflow
the black primary
OPERATION
is open.
Disconnect
the black primary lead
wiring label (See Fig. 16 and 17).
Connect
200-v.
on
of the EAC.
PROCEDURES
Be sure unit disconnect
are provided
and EAC-2).
While these terminals can be
EAC, it is recommended
that any EAC be
lead
from the transformer.
to the transformer
terminal
See unit
labeled
USER
INTERFACE
TOP
COVER
DISCONNECT
PER NEC*
*NEC
- NATIONAL
ELECTRICAL
CODE
A06091
Fig. 11 - Typical
Installation
12
GROUND SCREW
(IN SPLICE BOX)
GROUND
LEAD
SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
L1
/Z_._
--
L2 ......
BLKm
_YEL_
NOTE: Use copper wire only.
LEGEND
NEC - National Electrical Code
Field Wiring
_
Splice Connections
A06299
Fig. 12 - Line
Power
Connections
1
HP/AC
Board
Board
iil i
Splice Box
t
A06306
Fig. 13 - Control
13
Plate
User
interface
infinity Furnace
Board
infinity HP/AC
Board
OutdoorAirThermistor
(Supplied
withIU)
FIELDCONNECTION
REQUIRED
(BLACKWIRES)
OCT
B_Outdoor
CoilThermistor
FACTORY
CONNECTED
O
Y2
Y1
m
w1
c
R
LEGEND
FactoryWiring
FieldWiring ==_m
_m
m
FACTORY
WIRESPROVIDED
FORFIELDCONNECTION
OFUTiLiTYCURTAILMENT
A06301
Fig. 14 - Control Voltage Wiring Connections
1. Remove all access panels.
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with unit.
PRE-START-UP
FIRE,
HAZARD
EXPLOSION,
ELECTRICAL
3. Make the following inspections:
a. Inspect for shipping and handling damages, such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a
refrigerant leak. Leak test all refrigerant tubing
connections using electronic leak detector, or
liquid-soap solution. If a refrigerant leak is detected, see
following Check for Refrigerant Leaks section.
c. Inspect all field- and factory-wiring connections. Be
sure that connections are completed and tight.
d. Ensure wires do not touch refrigerant tubing or sharp
sheet metal edges.
e. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
SHOCK
Failure to follow this warning could result in personal
iniury or death and/or property damage.
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric power
to unit unless compressor terminal cover is in place and
secured.
3. Do not remove compressor terminal cover until all
electrical sources are disconnected and tagged.
4. Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box if
refrigerant
leak is suspected
around compressor
terminals.
5. Never attempt to repair soldered
refrigerant system is under pressure.
connection
6. Do not use torch to remove any component.
contains oil and refrigerant under pressure.
7. To remove a component,
proceed as follows:
wear protective
a. Make sure gas line is free of air. Before lighting the unit
for the first time, perform the following with the gas
valve in the OFF position:
NOTE:
If the gas supply pipe was not purged before connecting
the unit, it will be full of air. It is recommended that the ground
joint union be loosened, and the supply line be allowed to purge
until the odor of gas is detected. Never purge gas lines into a
combustion chamber. Immediately upon detection of gas odor,
retighten the union. Allow 5 minutes to elapse, then light unit.
while
System
goggles and
a. Shut off gas supply to unit.
b. Shut off electrical power to unit and install
lockout tag.
b. Make sure that condenser-fan blade is correctly
positioned in fan orifice. Top 1/3 of condenser fan blade
should be within fan orifice venturi.
c. Relieve and reclaim all refrigerant from system
using both high- and low-pressure ports.
d. Cut component connecting tubing with tubing
cutter and remove component from unit.
c. Ensure fan hub is positioned correctly with respect to
motor housing (See Fig. 24).
d. Make sure that air filter(s) is in place.
e. Make sure that condensate drain trap is filled with water
to ensure proper drainage.
f. Make sure that all tools and miscellaneous loose parts
have been removed.
e. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to flame.
Use the Start-Up
proceed
as follows
Checklist
supplied
to inspect
and
at the end of this book
prepare
the
unit
and
for initial
start-up:
14
Compressors are internally spring mounted. Do not loosen
or remove compressor holddown bolts.
6. Each unit system has two Schrader-type
ports, one
low-side Schrader fitting located on the suction line, and
one high-side Schrader fitting located on the compressor
discharge line. Be sure that caps on the ports are tight.
5.
START-UP
Unit Start-Up
and Troubleshooting
NOTE: Always check high- and low-voltage supply to the unit
components. Check the integrity of the plug receptacle connections
and unit wiring harness prior to assunfing a component failure.
A. LED Description
LEDs built into Infinity control boards provide installer or service
person information concerning operation and/or fault condition of
the unit controls and ECM motor. This information is also
available at the system UI in text with basic troubleshooting
instructions. Careful use of information displayed will reduce the
need for extensive manual troubleshooting.
Both the furnace and heat pump (HP)/air conditioner (AC) boards
have an amber LED and a green LED. On the HP/AC board, these
are located near the System Conmmnications connector (ABCD)
(lower right corner of the HP/AC board as installed in the unit).
On the furnace board, these are located at the upper right side,
adjacent to the fuse, above the ternfinal block. The amber LED is
the System Status LED, labeled STATUS. The green LED, labeled
COMM, is used as an indicator of system communications status
(See Fig. 15 and 18).
Status Codes will be displayed on the STATUS LED using the
following protocol:
1. The number of short flashes indicates first digit of code.
If COMM LED does not light within proper time period and status
code is displayed:
1. Check system wiring to be sure UI is powered and
connections are made A to A, B to B, etc. and wiring is not
shorted.
Mis-wiring
or shorting
of
the ABCD
communications
wiring
will not allow
successful
communications.
NOTE:
Shorting or ntis-wiring low-voltage system wiring will
not cause damage to unit control or UI but may cause low voltage
fuse to open.
C. Indoor Fan Motor Troubleshooting
The indoor fan is driven by an ECM motor consisting of two
parts: the control module and the motor winding section. Do not
assume motor or module is defective if it will not start. Use the
designed-in LED information aids and follow troubleshooting
steps described below before replacing motor control module or
entire motor. Motor control module is available as a replacement
part.
VERIFY MOTOR WINDING SECTION
ELECTRICALSHOCK
Failure to follow this warning
iniury or death.
Before proceeding to replace a motor control module:
1. Check motor winding section to be sure it is flmctional.
2. Remove motor control module section and unplug winding
plug. Motor shaft should turn freely, resistance between any
two motor leads should be similar and resistance between
any motor lead and unpainted motor end should exceed
100,000 ohms.
3. A short flash is 0.25 seconds on. A long flash is 1 second
on.
4. The time between flashes is 0.25 seconds.
6. The LEDs will be off for 2.5 seconds before repeating code.
7. If multiple status codes are active concurrently, the highest
priority status code is displayed.
B. Control
Start-Up
and
System
Communications
Troubleshooting
On power up, green COMM LEDs will be turned off until
successful system communications are established (this should
happen within 10 seconds). Once conmmnications with UI are
successful, both COMM LEDs will be lit and held on. At the same
time, amber STATUS LEDs will be lit and held continuously on
until a request for operating mode is received. The STATUS LED
will be on any time unit is in idle mode.
If, at any time, communications are not successful for a period
exceeding 2 nfinutes, the Infinity control will only allow
emergency heating or cooling operation using a common
thermostat and the ternfinal strip connections on the two control
boards (See Non-Conmmnicating
Emergency Cooling/Heating
Mode) and will display Status Code 16, System Conmmnication
Fault, on amber STATUS LED. No further troubleshooting
information will be available at UI until communications are
re-established.
could result in personal
After disconnecting power from the ECM motor, wait at
least 5 nfinutes before removing the control section. Internal
capacitors require time to discharge.
2. The number of long flashes indicates second digit of code.
5. The time between last short flash and first long flash is 1
second.
HAZARD
3. Failing any of these tests, entire ECM motor must be
replaced.
4. Passing all of the tests, motor control module alone can be
replaced.
MOTOR TURNS SLOWLY
1. Low static pressure loading of blower while access panel is
removed will cause blower to run slowly. Particularly at low
airflow requests. This is normal, do not assume a fault
exists.
2. Recheck airflow and system static pressure using UI service
screens with access panel in place.
If either COMM LED does not light within proper time period and
status codes are not displayed;
1. Check system transformer high- and low-voltage to be sure
the system is powered.
2. Check ABCD connection on both boards.
3. Check fuse on furnace board to be sure it is not blown. If
fuse is open, check system wiring before replacing it to be
sure a short does not cause a failure of replacement fuse.
15
NOTE:
Blower
operation.
The fan coil control
motor
faults will not cause
will attempt
as long as UI maintains
a demand
operate
while
electric
communicates
even when
heaters
with
the motor
the motor
not communicate
motor will shut
for airflow.
a fault
a lockout
The
condition
at least
is idle. If, during
of blower
to run the blower
once
control
exists.
every
operation,
motor
will not
The control
five
seconds,
the control
does
with the motor for more than 25 seconds, the
itself down and wait for communications
to be
STATUS
Control
CODE
14 - IGNITION
LOCKOUT
will auto reset after three hours. Refer to status code 34.
STATUS
CODE
Indicates
the blower
to communicate
15 - BLOWER
failed
within
MOTOR
30 seconds
successive
heating cycles.
Refer to status code 41.
LOCKOUT
to reach 250 RPM
Control
after being
will
auto
or the blower
turned
failed
ON in two
reset after
3 hours.
reestablished.
D. Furnace
Control
Troubleshooting
Furnace control faults indicated by flashing codes on the amber
system
STATUS
LED can be resolved
using troubleshooting
information
provided below. ('odes
are listed in order of their
priority, highest to lowest. Though multiple faults can exist at any
time, only the highest priority code will be displayed on STATUS
LED.
cause
Clearing the indicated fault when multiple faults exist will
the next highest priority Status Code to be flashed. All
existing
STATUS
faults, as well as a fault history, can be viewed
CODE
CONTINUOUS
Check for 230 VAC
SEC-2.
STATUS
Control
STATUS
CODE
at L1 and L2, and 24 VAC at SEC-1
CONTINUOUS
and
ON
has 24 VAC power.
CODE
Stored status
STATUS
at UI.
OFF
11 - NO PREVIOUS
codes
CODE
are erased
CODE
automatically
12 - BLOWER
ON AFTER
after 72 hours.
POWER
UP
(230 VAC or 24 VAC) Blower runs for 90 seconds if unit is
powered up during a call for heat (R-W/W1
closed) or (R-W/W1
opens) during blower on-delay
period.
STATUS
CODE
13 - LIMIT
CIRCUIT
A00026
Fig. 15 - Detail
LOCKOUT
Lockout occurs if a limit or flame rollout switch is open longer
than 3 minutes or 10 successive
limit trips occurred during high
heat. Control will auto reset after three hours. Refer to status code
33.
16
of Furnace
Board
LADDER WIRING DIAGRAM
DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWERBEFORE SERVICING
LI
_
B_
USE
COPPER
CONDUCTORS
ONLY
G_v
FIELD SUPPLY 208/230 VAC, 60 HZ, IPH
L2
_
I_B_'
Y
Y
COlT
O_
23
CONY
25
L2
23
I
ii
23
c
s
t}
LEGEND
_
@
_°
?
PL_
1 _2_mR_
FIELD SPLICE
SPLICE
E2_
FACTOR WI I_G
FIELD CONTROL WIRING
FIELD PO_,ER _IRING
RSC
CONTACTOR
CO_
..q
SEE NOTES--
COMPRESSOR _OTOR
CS
CO_PRESSOI SOLENOID
¢CH
EOUIP
FS
GND
NPS
TRAI
T
F
REMOTE SPARKER CONTROL
CORT
¢IAN_ CASE HEATEI
EO_IP_EIT
FLA_E SENSOR
GIOU_D
HIGH PIESSilE
S_ITCN
TIANSFOR_EI
_B_
IF_
LPS
ms
GV
OF_
RS
I_NITOR
I_DiCER
DRAFT _OTOR
I_DO01
FA_ _OTO1
LOW P1ESSiRE
SWITCH
m[_[T
S_ITCH
GAS WErE
OtTDOOR FAN _OTOR
ROLLOtT SWITCH
OCT
OUTDOOR COIL
................
LLS
Ul
L[O_ID LI_E
SOLENOID
USEI I_TEIFACE
UE
P
Pill
_L[NE
B
P
,
_
THERMISTOR
S
_
S
7
2
_
RS
_ ;
_
LB_
_
YELLOI
p
_
LSB
=
T I
Y
VOLTAGE
FACTORY
LOW VOLTAGE FIELD
LOW VOLTAGE FACTORY
_L[NE
VOLTAGE FIELD
[NTERNAL CIRCUIT
GREEN
G
IOARD IIRIIG
P
NOTES
iE A_Y OF THE ORIGINAL
WIRE FURNISHED
IS REPLACED,
iT _UST BE REPLACED WITH TYPE 90 C OR EQUIVALENT
sB°C
COPPER
EOR FIELD
CONDUCTORS
IISTALLATIONB
K
H
i
USE
2
I
REPLACE LOW VOLTAGE FUSE _ITH
3 AMP FUSE OILY
(MANUFACTURED
BY LITTLEFUSE,
P/N
INTO03}
LP
_ODEL ON4 O_O,
MODELS 036 060,
_HE_HE_
I
TO BE _IRED
LOCAL CODES
BiDdER
IN
LS_ AND LS2 ARE ]_
HAVE LSI ONLY
ACCORDANCE
ON DELAY
FOR GAS
WITH
SERIES
NEE AN_
BEATing
IS
SO SECONDS
BLOWER OFF DELAY FOR GAS HEATING
[S _20 SECONDS
DEFAULT WITH FIELD BELECTABLE
DELAYS DE 90
120>
_50
OR i80 SECONDS AVAILABLE
BLOWER
OFF
DELkY
FOR COOLING
iGNiTiO_
LOCKOUT OCCURS AFTER
UNSUCCESSFUL
IGNITION
ATTEMPTS
AUTO RESET AFTER T_REE HOURS
o>
(o
IS
90 SECONDS
FOUR CONSECUTIVE
CONTROL WiLL
ii
CONNECTION WIRING DIAGRAM
DAN6ER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING
FIELD SUPPLY
UNIT
COMPONENT
ARRANGEMENT
208/230
_
"'J
_--
LADDER WIRING
DANGER: ELECTRICAL
L1
I
BK
VAC
USE
FIELD
COPPER
SHOCK HAZARD DISCONNECT
CONDUCTORS
208/230
SUPPLY
DIAGRAM
POWERBEFORE
SERVICING
I LR
ONlY
VAC,
60
HZ,
1PH
Y
I
60HZ,IPH
SECTIO_
O_TDOOR FA_
[]
Y
[]
GONT
SECTION
I
E_
CAP
BR
MS
I
L!
_E_R
B
=.
T
--
Y
_,T
q_
GAS
_
@
_o
?
LEGEND
FIELD SPLICE
SPLICE
FACTORY WIRING
- FIELD
F[ELN
TI
PL2
CONTROL WIRING
PO_ER WIRING
_
PL2
1
2
L2
RSC
R E_¢OTE SPARKER
CONTROL
CONT
CAP
CONTACTOR
CAPACITOR
COMP
COMPRESSOR
_OTOR
CRANK
HEATER
PL2-_
230V
CS
CCH
FLAME SENSOR
GROUND
HIGH PRESSURE
TRANSFORMER
GND
HPS
TRAM
=
q_
CASE
_BK_Y_
SWITCH
T
Do
NL/P-
I
LSR
I
I s CT I
MODLS I
_LINE
VOLTAGE
FACTORY
LOW VOLTAGE
FIELN
LOW VOLTAGE
FACTORY
_LINE
VOLTAGE
FIELN
INTERNAL
CIRCUIT
HOARD _IR[NG
NOTES:
!F ANY OF THE ORIGINAL
IT MUST
BE REPLAC
D W
USE
?S°C
REPLACE
MODELS
COPPER
LOW
VOLTAGE
036-060,
TO BE WIRED
]OCAL
CODER
BLOWER-ON
WINE
FNRNjSHED
TN TYPE RO C OR
CONDUCTORS
HAVE
FUSE
LSI
IN ACCORDANCE
DELAY
_OR
GAS
EON
EIELD
WITH
3 AMP
IS REPLACED
EQU VALENT
INSTALLATIONS
FUSE
ONLY
WITH
NEC
HEALING
IS
AND
30
SECONDS
BLOWER-OFF
DELAY FOR GAS
HEATING
IS iRO
DEFANLT
W]TN
FIELD
SELECTABLE
DELAYS
OF
150,
ON 180 SECONDS AVAILABLE
BLOWER-OFF
DELAY
FOR COOLING
IGNITION
LOCKOUT
OCCURS
AFTER
UNSUCCESSFUL
IGNITION
ATIEMPTS
AUTO-RESET
AFTER
THREE
HOURS
o>
2
o_
ONLY
[S
90
SECONDS
90, 120,
SECONDS
FOUR
CONSECUTIVE,
CONTROL
WILL
TRAMS
C
L2
i2 _
o
©
D
O
O O
O
[
OO
•43ff]°
O0
d]]O
0
oo
.a
O
UTILITY
RELAY
UTILITY
OPEN
'_
* SUPPLIED
@ IRcD
*
Lql_id
SIGNAL
RELAY
BY UTILITY
@
@
Ilne
So
lellold
PROVIDER
A05247
Fig. 18 - 2-Stage
STATUS
CODE 21 - GAS HEATING
Control will NOT auto reset.
defective control (valve relay).
STATUS
CODE
22
HP/AC
LOCKOUT
Check
for mis-wired
gas valve
or
is proved
while
until fault is cleared.
valve.
FLAME-PROVING
STATUS
Check
closed.
pressure
SWITCH
tubing
CODE 24 - SECONDARY
for short circuit
STATUS
CODE
SETUP ERROR
25
voltage
INVALID
switch
FUSE
(24VAC)
MODEL
gas
stuck
IS OPEN
wiring.
SELECTION
OR
is missing or incorrect.
If code
control
is defaulting
to model
selection stored in memory. Check for proper
and resistance values per wiring diagram.
STATUS CODE 31, 32 - PRESSURE
DID NOT CLOSE OR REOPENED
model
plug number
SWITCH
OR RELAY
period, blower will come on for the selected
Check
for excessive
wind, restricted
vent,
motor, defective pressure switch, lower inducer
voltage
(230VAC),
inadequate
disconnected
or obstructed
pressure
pressure
combustion
air
supply,
tubing,
or low inlet gas
(if LGPS used).
STATUS
CODE 33 - LIMIT
CIRCUIT
FAULT
Indicates a limit or flame rollout switch is open. Blower will run
for 4 minutes or until open switch remakes, whichever is longer. If
open longer than 3 minutes, code changes to lockout 13. If open
less than 3 minutes status code 33 continues to flash until blower
shuts off. Check
wind,
dirty
filter
for loose blower
or restricted
wheel,
duct
restricted
system,
vent,
defective
excessive
switch
or
combustion
CODE 34 - IGNITION
air supply
PROVING
(flame
roll-out
FAILURE
Control will try three more times before lockout 14 occurs. If flame
signal lost during blower on-delay
period, blower will come on for
the selected blower off-delay.
Check for oxide buildup on flame
sensor
(clean with fine steel wool),
proper
flame
sense microamps
(.5 microamps
D.C.
min.,
4.0-6.0
nominal),
manual
valve
shut-off,
low inlet gas pressure,
control ground continuity,
gas
valve defective or turned off, flame sensor must not be grounded,
inadequate
flame carryover or rough ignition, or green/yellow
wire
must be connected to unit sheet metal.
STATUS
CODE 41 - BLOWER
Indicates
the blower
after being
operation.
STATUS
Auto
relay may be defective. If open longer than five minutes,
shuts off for 15 minutes before retry. If opens during
blower on-delay
blower
off-delay.
defective inducer
connections,
or inadequate
switch open).
to communicate
Indicates
either the model plug
flashes 4 times on power-up,
Control
inducer
will run
DID NOT OPEN
or pressure
VOLTAGE
in secondary
-
Inducer
for leaky gas valve or stuck-open
CODE 23 - PRESSURE
for obstructed
STATUS
Check
gas valve is de-energized.
Check
Board
STATUS
ABNORMAL
SIGNAL
Flame
Control
failed
within
turned
MOTOR
FAULT
to reach 250 RPM
the prescribed
ON
or
ten
CODE 45 - CONTROL
reset after one hour lockout
or the blower
time limits.
seconds
Thirty
during
CIRCUITRY
failed
seconds
steady-state
LOCKOUT
due to gas valve relay stuck open,
flame sense circuit failure, or software check error. Reset power
clear lockout. Replace control if status code repeats.
E. HP/AC
See
Control
Table
4
troubleshooting
STATUS
SENSOR
to
Troubleshooting
for
HP/AC
control
board
status
codes
and
information.
CODE
53,
OUTDOOR
AIR
FAULT - DETAILED
DESCRIPTION
If an OAT sensor is found
at power-up,
TEMPERATURE
input is constantly
to be within a valid temperature
range. If sensor
open or shorted at any time after initial validation,
will be displayed at amber STATUS LED.
Check for faults in wiring connecting
Using an Ohm meter, check resistance
checked
is found to be
Status Code 53
sensor to OAT terminals.
of thermistor for a short or
open condition.
If thermistor
normal
19
is shorted
operation.
or open,
If fault
replace
is in the wiring
it to return
the system
connections,
correcting
to
the fault
will
clear the code
and return
the system
to normal
operation.
NOTE:
If fault condition
is an open thermistor
or a wiring
problem
HYBRID
HEAT
SEQUENCE
OF OPERATION
The Hybrid Heat sequence
heating, is as follows:
of operation,
from
satisfied
to full
that appears to be an open thermistor and the power to the unit is
cycled off, the fault code will be cleared on the next power-up
but
The system will attempt to satisfy the call for heat with the first
stage heat pump. There is a ten-minute
staging
timer before
the fault will remain and system
This is because
on power-up,
switching
the difference
installed.
Sequence
between
operation will not be as expected.
the unit control cannot discern
an open
sensor
or if a sensor
of Operation
The 48XT Hybrid Heat unit is designed
communicating
UI. This unit will not
provided
situations
is not
for installation
with a
respond
to commands
by a common thermostat except under certain emergency
described in Step 1--Start-Up
and Troubleshooting.
The UI uses temperature,
humidity
and other data supplied from
indoor
and outdoor
system
components
to control
heating or
cooling system for optimum comfort. The unit will be commanded
by UI to supply airflow. The unit will operate
requested airflow for most modes.
INDOOR
AIRFLOW
The nominal
the indoor
blower
at
airflow
for heat pump
operations
will
be
350 cfm per ton of nominal cooling capacity as defined by unit
size. Actual airflow request will be adjusted from nominal using
indoor
and outdoor
temperature
and indoor humidity
data to
optimize
the system operation
for occupant
comfort and system
efficiency. Refer to UI literature for further system control details.
call for heat still exists after 10 minutes, the system will stage to
second stage gas and run until the call for heat is satisfied.
NOTE:
Heat stages are not shortened
demand.
All stages
above.
OPERATION
HAZARD
HEAT
NOTE:
airflow for the system
PUMP
COOLING
are open,
free from obstructions,
and adjusted
properly.Airflow
can be
changed using the User Interface. See UI installation
instructions
for more detail.
NOTE:
should
Once the compressor
has started and then has stopped, it
not be started again until 4 minutes have elapsed. The
cooling
cycle
remains
point that is slightly
"on"
below
until
the room
the cooling
Table
temperature
control
setting
drops
to
of the UI.
3 - Air Delivery
Rated Heating Input (Btu/hr)
High Stage
Low Stage
48XT(-,N)030040
40,000
26,000
48XT(-,N)030060
48XT(-,N)036060
48XT(-,N)042060
60,000
39,000
See UI intallation
instructions
SEQUENCE
OF OPERATION
OPERATION
the outdoor fan, reversing valve,
energized.
If low-stage
cannot
When
NOTE:
Outdoor
fan motor
after compressor
in the heating
unit is operating
vapor (suction) pressure will be higher
system or high-stage
operation.
or a call
fan and
will
mode.
at low-stage,
than a standard
continue
to operate
shuts off, when outdoor
system
single-stage
ambient
for one
is greater
than or equal to 100°F (38°C).
UTILITY
The
utility
INTERFACE
curtailment
WITH
INFINITY
relay
should
CONTROL
be
connected
to
factory
supplied pigtails (PINK, connected to R, VIOLET connected
to Y2
on the control board) located in the low voltage splice box (See
Fig. 13, 14 and 16). This input allows a power utility device to
interrupt compressor
operation during peak load periods. When the
utility sends a signal to shut the system down, the UI will display,
"Curtailment
Active".
and Temperature
Rise at Rated
Heating Rise Range OF (oc)
High Stage
valve is de-energized
two-stage
Low Stage
Heating
Input
Heating Rise Either Stage, °F (oc)
"Efficiency ....
Comfort"
High Stage
Low Stage
High Stage
Low Stage
20 - 50
15-45
35
30
40
35
(11-28)
(8-25)
(19)
(17)
(22)
(19)
25 - 55
(14-31
)
25 - 55
40
50
(14-31 )
(22)
(28)
48XT(-,N)036090
48XT(-,N)042090
48XT(-,N)048090
48XT(-,N)060090
toward
has elapsed.
UP
buttons
again. When both first stage and second stage cooling are
the compressor
will shut off. The reversing
valve will
Unit
48XT(-,N)024040
progress
timer
satisfy cooling demand, high-stage
cooling is energized by the UI.
After second
stage is satisfied,
the unit returns
to low-stage
operation
until first stage is satisfied
or until second
stage is
NOTE:
rise in each
the desired
grilles
cycle timers.
With a call for first stage cooling,
and low stage compressor
are
minute
return-air
sufficient
AND HEATING
off. The reversing
being installed.
Be sure that all supply-and
it is making
it may not stage up after the staging
the
FAN
and
TEMPERATURE
or higher
time described
compressor
are energized. The compressor
will operate in high or
low stage operation,
as needed to meet the heating demand. When
the heating demand is satisfied, the compressor
and fan will shut
For cooling operation, the recommended airflow is 350 to
450 cfm for each 12,000 Btuh of rated cooling capacity. For
heating operation, the airflow must produce a temperature
rise that falls within the range stamped on the unit rating
plate.
For gas heat operations, Table 3 shows the temperature
gas heating mode. Refer to these tables to determine
due to a 5 degree
for the full allotted
remain energized until the control board power is removed
for heating in initiated. With a call for heating, the outdoor
Failure to follow this caution may result in unit damage.
heating
are utilized
If the UI determines
set point,
Pressing
required
satisfied,
UNIT
stage heat pump.
For first stage gas the heat pump will be off unless the unit is in
defrost. There is a ten-minute
staging timer on first stage gas. If
simultaneously
defeats
for more detail.
ADJUSTMENTS
requested
to the second
Second stage heat pump will run until call for heat is satisfied or
for fifteen minutes. If after 15 minutes the call for heat still exists,
the unit will stage to first stage gas.
90,000
58,500
35 - 65
(19-36)
35 - 65
(19-36)
50
(28)
55
(31)
48XT(-,N)048115
48XT(-,N)060115
115,000
75,000
30 - 60
(17-33)
30 - 60
(17-33)
45
(25)
50
(28)
48XT(-,N)048130
48XT(-,N)060130
130,000
84,500
35 - 65
(19-36)
35 - 65
(19-36)
50
(28)
55
(31)
Airflow delivery values for external static pressure values of up to 1 in. wc.
20
Table
OPERATION
4 - Heat Pump/Air
Board
Status
AMBER
LED
FLASH
CODE
FAULT
Standby - no call for unit operation
Conditioner
On solid,
no flash
None
Rapid, continuous
flashing
POSSIBLE CAUSE AND ACTION
Normal operation.
Emergency Mode
Standard Thermostat Control
Low Stage Cool/Heat Operation
None
1, pause
Normal operation.
High Stage Cool/Heat Operation
None
2, pause
Normal operation.
When
16
Communication
units.
Invalid Model
Plug
25
Control does not detect a model plug or detects an invalid model
plug. Unit will not operate without correct model plug.
High-Pressure
Switch Open
31
High-pressure
switch trip. Check refrigerant charge, outdoor fan
operation and coils for airflow restrictions.
Low-Pressure
Switch Open
32
Control Fault
45
Low-pressure
switch trip. Check refrigerant charge and indoor air
flow.
Outdoor unit control board has failed. Control board needs to be
Brown Out
(230 v)
46
is operating
No 230v at Unit
47
There is no 230v at the contactor when indoor unit is powered and
cooling/heating demand exists. Verify the disconnect is closed and
230v wiring is connected to the unit.
Temp Sensor
Fault
53
Outdoor air sensor not reading or out of range. Ohm out sensor
and check wiring.
Outdoor Coil
Sensor Fault
55
Coil sensor not reading or out of range. Ohm out sensor and check
wiring.
Thermistors
of Range
Out
56
Improper relationship between coil sensor and outdoor air sensor.
Ohm out sensors and check wiring.
Low Stage Thermal Cutout
71
High Stage Thermal Cutout
72
ing demand exists. Possible causes are internal compressor
load trip or start relay not releasing (if installed).
Contactor
Shorted
73
Compressor voltage sensed when no demand for compressor operation exists. Contactor may be stuck closed or there is a wiring
error.
No 230V at
Compressor
74
Compressor voltage not sensed when compressor should be starting. Contactor may be stuck open or there is a wiring error.
Low Stage Thermal Lockout
81
Thermal cutout occurs in three consecutive low/high stage cycles.
Low stage locked out for 4 hours or until 24v power recycled.
High Stage Thermal Lockout
82
Thermal cutout occurs in three consecutive high/low stage cycles.
High stage locked out for 4 hours or until 24v power recycled.
Line voltage < 187v for at least 4 seconds. Compressor and fan
operation not allowed until voltage>190v.
Verify line voltage.
Compressor voltage sensed, then disappears while cooling or heating demand exists. Possible causes are internal compressor
load trip or start relay not releasing (if installed).
24-volt
over-
Compressor voltage sensed, then disappears while cooling or heatover-
Low-Pressure
Lockout
83
Low-pressure
switch trip has occurred during 3 consecutive
cycles. Unit operation locked out for 4 hours or until 24v power
recycled.
High-Pressure
Lockout
84
cycles. Unit operation locked out for 4 hours or until 24v power
recycled.
High-pressure
in low
stage,
the modulating
ring is deactivated,
allowing two internal bypass ports to close off
33% of the scroll compression
area so the system operates at part
load capacity.
The
low-stage
operation.
with Ut lost. Check wiring to Ut, indoor and outdoor
replaced.
OPERATION
the compressor
Unit being controlled by standard thermostat inputs instead of Infinity Control. Only high stage operation is available. This operating
mode should be used in emergency situations only.
System Communications Failure
Outdoor Air
COMPRESSOR
Codes
solenoid
coil
is de-energized
in
switch trip has occurred during 3 consecutive
CRANKCASE
HEATER
The
heater
crankcase
(18 ° C) outdoor
OPERATION
is energized
OUTDOOR
FAN MOTOR
The outdoor
compressor
unit control
is operating,
compressor
to operate at full load capacity.
coil is energized in high stage operation.
minute
65°F
after the compressor
The unit time delays
include:
fan any time the
The outdoor
fan
switch or compressor
overload
will continue to operate for one
shuts off when the outdoor
greater than or equal to 100°F (38°C).
TIME DELAYS-HEAT
PUMP OPERATIONS
21
below
OPERATION
energizes the outdoor
except
for defrost.
remains
energized
if a pressure
should open. Outdoor fan motor
solenoid
off cycle
air temperature.
When the compressor
is operating
at high stage, the modulating
ring is activated,
sealing
the bypass
ports, which
allows the
The 24-volt
(IF APPLICABLE)
during
ambient
is
• Fiveminute
time
delay to start heat pump
cooling
operation
when there is a call from the thermostat
interface.
To bypass
Forced
Defrost
• Five minute
brown-out
this feature,
momentarily
or heating
AUTO
defrost
or user
• When defrost
short and release
pins.
• When defrost
recycle delay on return from a
time delay to return to standby
valid communication
(with Infinity
operation
• When defrost
from last
fan at termination
ambient is greater
• When defrost
of cooling
auxiliary
delay at termination
heat (WI)
• Twenty
second
than or equal to 100°F
of defrost
before
the
is de-energized.
delay at termination
compressor
of defrost before
the outdoor
delay when quiet shift enabled.
• There is no time delay between
heat pump
high and from high to low capacity;
from
low to high
and from
staging
from low to
the compressor
high
will change
to low capacity
CONTROLLED
LOW
AMBIENT
unit
is capable
(-17.8°C)
of
ONLY when
kit is not required,
replaced
for
ambient
low
must
coil
ambient
and
outdoor
fan motor
ambient
OAT (4.4°C).
air temperature.
to
0°F
does not need to be
in the UI set-up.
operation.
Low
Fan may not
Fan will cycle based
Infinity
controlled
low
as follows:
plus 3°F (1.7°C)
(Fan
A low ambient
low
• In high stage, fan is off when
minutes.
down
control.
be enabled
mode operates
temperature
is turned
outdoor
coil temp
or outdoor
off to allow
• In low stage, fan is off when outdoor
plus I°F (.6°C)
minutes.
(Fan
is 80°F (26.7°C)
(Fan is turned
• Low-pressure
ambient
coil temp >
switch
is ignored
system to stabilize.)
for first 3 minutes
3 minutes,
during
low
if LPS trips, then outdoor
fan
off for 10 minutes with the compressor
LPS closes within
10 minutes
fan cycling
for the remainder
within
10 minutes,
cooling
operation
then cooling
per the coil temperature
of the cooling
running.
continues
routine
If
with the
listed above
cycle. If the LPS does not close
then the normal
and generate
coil temp
fan has been OFF for 30 minutes.
on to allow refrigerant
start up. After
outdoor
outdoor
plus 25 °F (13.4 ° C)or outdoor
or if outdoor
motor is turned
LPS trip response
(shut down
LPS trip error) will occur.
DEFROST
This control offers 5 possible
nfinutes, or AUTO.
The defrost
interval
are selected
by the Infinity
are not used.)
time 5-7 minutes,
the next defrost
interval=60
defrost
interval
times: 30, 60, 90, 120
times: 30, 60, 90, and 120
Control
User Interface
nfinutes
time >7 minutes,
the next defrost
interval=30
• Defrost is only allowed to occur below 50°F (10°C) outdoor
ambient temperature.
DEFROST HOLD
Defrost hold is not needed in a communicating system because the
UI will complete the defrost cycle before shutting down the
system.
FORCED DEFROST
Forced defrost is initiated with the UI.
During a Forced Defrost:
• If coil temperature is at defrost temperature of 32°F (0°C), and
outdoor air temperature is below 50°F (10°C), a full defrost
fan has been ON for 30
stabilize.)
temperature
interval=90
minutes. Remaining intervals are at selected times.
cooling
controlled
begin to cycle until about 40°F
on
ambient
using the Infinity
and the outdoor
Infinity
cooling
the next defrost
exists when the coil temperature is at or below 32°F (0°C) for 4
minutes during the interval.
The defrost cycle is terminated when the coil temperature reaches
65°F (18°C) or 10 minutes has passed.
COOLING
NOTE:
When this unit is operating below 55°F (12.8°C) outdoor
temperature,
provisions
must be made for low ambient operation.
This
time 3-5 minutes,
If the coil temperature does not reach 32°F (0°C) within the
interval, the interval timer will be reset and start over.
• Upon initial power up the first defrost interval is defaulted to 30
as demand
dictates.
INFINITY
interval=120
The HP/AC control board accumulates compressor run time. As
the accumulated run time approaches the selected defrost interval
time, the control board monitors the coil temperature sensor for a
defrost demand. If a defrost demand exists, a defrost cycle will be
initiated at the end of the selected time interval. A defrost demand
fan is energized.
• Thirty second
the next defrost
on the last
minutes.
(38°C).
second
time based
minutes.
only).
time delay of outdoor
mode when outdoor
• Fifteen
time <3 minutes,
interval
minutes.
condition.
• One minute
the defrost
minutes.
compressor
• Two minute
defrost adjusts
time as follows:
or AUTO
(the dip switches
sequence will occur.
• If coil temperature or outdoor air temperature do not meet the
above requirements, an abbreviated 30 second defrost will occur.
QUIET SHIFT
Quiet Shift is a field-selectable defrost mode which may elinfinate
occasional noise that could be heard at the start of the defrost cycle
and restarting of the heating cycle. This feature must be enabled at
the UI. When activated, the following sequence of operation will
occur. Reversing valve will energize and compressor will turn off
for 30 seconds, then turn back on to complete defrost. At the end
of the defrost cycle, the reversing valve de-energizes, compressor
will turn off for another 30 seconds, and the fan will turn off for 40
seconds, before starting in the heating mode.
DEHUMIDIFICATION MODE
This Infinity system can be used to dehunfidify the living space.
See User Interface Installation Instructions for more details.
SEQUENCE OF OPERATION-GAS
HEAT
NOTE:
Infinity control must be grounded for proper operation or
control will lock out.
NOTE:
If a power interruption occurs during a call for heat, the
control will start a 90-second blower-only ON period two seconds
after power is restored, if the UI is still calling for gas heating. The
amber LED light will flash code 12 during the 90-second period,
after which the LED will be ON continuously, as long as no faults
are detected. After the 90-second period, the unit will respond to
the UI normally.
22
GASHEAT
MODE
ANDADJUSTMENTS
When
the UI calls for gas heat, the Infinity furnace board
a self-check,
inducer
verifies
the pressure
switch
performs
and starts the
is open,
FIRE
on high speed.
1. Inducer
Pre-purge
Period:
When
the inducer
motor
comes
up on
Infinity
high speed, the pressure
switch
closes, and the
ignition control on the furnace board begins a 15
second
remain
pre-purge
period.
closed, the inducer
2. Trial-For-Ignition
for 3 seconds.
Failure to follow this warning
could
iniury, death and/or property damage.
ignition
control
result
in personal
DO NOT bottom out gas valve regulator adjusting screws.
This can result in unregulated
manifold
pressure and result
in excess overfire and heat exchanger failures.
If the pressure switch fails to
will remain running.
After the
pressure switch re-closes,
the Infinity
begin a 15 second pre-purge
period.
HAZARD
will
Sequence:
The spark igniter will spark
The main gas valve relay contact closes to
energize the gas valve
igniter
is de-energized
on low stage. After
and a 2-second
5 seconds, the
flame-proving
period begins.
NOTE:
The unit always lights
speed inducer and low stage gas valve operation.
3. Flame-Proving:
flame-proving
When the burner flame
sensor, the furnace control
CARBON
on high
is proved
determines
MONOXIDE
POISONING
HAZARD
Failure to follow this warning
could
iniury, death and/or property damage.
at the
what
result
in personal
If the manifold
pressure
and/or gas rate is not properly
adjusted on HI and LO stages, excess carbon monoxide can
be produced.
heating stage to run based on feedback from the UI. If the
UI is asking for low stage gas heat, the ignition control will
change the inducer speed to low speed and keep the gas
valve energized on low stage.
If the UI is asking for high
stage gas heat, the ignition control will maintain running the
inducer on high speed and energize the gas valve's high
stage relay to increase gas flow.
If the burner flame is not proved within 2 seconds, the control will
close the gas valve and repeat the ignition sequence up to 3 more
Trials-For-Ignition
before going to Ignition-Lockout.
will reset automatically
after 3 hours, by momentarily
Lockout
interrupting
230 VAC power, or by interrupting
SEC2 to the furnace board.
at SEC1
24 VAC power
FIRE
is no longer
4. Blower-On
cleaner
cycle.
NOTE:
the humidifier
terminal
EAC-I
EAC-2
are
terminal
ll5VAC-to-ground
the
burner
flame
is
proven,
terminal
energized
is common
HUM
and electronic
throughout
with
the
have
when unit is powered.
period. The indoor blower and air cleaner terminal EAC-I
will remain energized
for 90, 120, 150, or 180 seconds
(depending
on selection of blower-off
delay selected in the
UI).
The factory-set
default is 120-second
blower-OFF
delay.
(NATURAL
m).
1. Determine
Input
rate must be within
the correct
at altitudes
up to
- 2% of rating
plate
in Table 4 are for altitudes
from sea level to 2000 ft (610 m) above sea level.
These inputs are based on natural gas with a heating
value of 1050 Btu/ft3 at .65 specific gravity.
IN THE U.S.A.:
input
reduced
rating
for altitudes
by 4 percent
For installations
plate.
above
for each 1,000
below
2,000
2,000
ft (610
m) must
ft (610
m), refer to the unit rating
For installations
above 2,000 ft (610 m), multiply the input by on
the rating plate by the derate multiplier
in Table 6 for the correct
input rate.
IN CANADA:
The input rating for altitudes
from 2,000 (610 m) to 4,500
10 percent
ft (1372
by an authorized
EXAMPLE:
90,000
UNIT
DAMAGE
Failure to follow
damage.
HAZARD
this
caution
may
result
in component
be
ft (305 m) above sea level.
m) above sea level must be derated
Gas Conversion
Station or Dealer.
GAS)
pressure
gas input rate.
a. The rated gas inputs shown
The
the burners, and de-energizing
the HUM terminal.
The
inducer motor will remain on for a 4-second
post-purge
GAS INPUT
2000 ft (610
input.
heating
L2 and will
in personal
Unsafe operation of the unit may result if manifold
is outside of the ranges listed in Table 6.
air
5. Blower-Off
Delay: When the call for gas heat is satisfied,
the gas valve is de-energized,
stopping
the flow of gas to
CHECK
result
Gas input rates on rating plate are for installations
If
approximately
37 seconds after the gas valve is opened the
Indoor Blower is turned on to the appropriate speed for the
gas heating stage.
Simultaneously,
HAZARD
or
proved.
Delay:
DAMAGE
Failure to follow this warning
could
iniury or death and/or property damage.
If flame is proved when there should be no flame present, control
will lock out of Gas-Heating
mode and operate the inducer motor
until flame
AND UNIT
Bhuh Input Furnace
Furnace Input Rate
at Sea Level
Altitude
90,000
Do not
redrill
an orifice.
Improper
drilling
(burrs,
out-of-round
holes, etc.) can cause excessive burner noise
and misdirection
of burner flame. If orifice hole appears
damaged
or it is suspected
to have been redrilled,
check
orifice hole with a numbered drill bit of correct size.
23
X
X
Installed
at 4300 ft (1311 m).
Derate Multiplier
Factor
0.90
Furnace Input Rate
at Installation
=
81,000
Table
5-
Altitude
Derate
Multiplier
for U.S.A.
a. Turn off all other gas appliances
and pilots
served by
the gas meter.
Altitude
ft (m)
Percent
Derate Multiplier
Factor*
of Derate
0-2000
(0-610)
0
1.00
2001-3000
(610-914)
8-12
0.90
3001-4000
(915-1219)
12-16
0.86
4001-5000
(1220-1524)
16-20
0.82
5001-6000
(1524-1829)
20-24
0.78
6001-7000
(1829-2134)
24-28
0.74
7001-8000
(2134-2436)
28-32
0.70
b. If unit is not running,
set unit to run for 20 nfinutes
in
low-stage
gas heat operation using the "INSTALLER
CHECKOUT"
menu on the User Interface.
c. Record number
one revolution.
of seconds
for gas meter to complete
d. Divide number of seconds
of seconds in 1 hour).
in step c. into 3600 (number
e. Multiply result of step d. by the number of cubic feet
shown for one revolution
of test dial to obtain cubic feet
of gas flow per hour.
8001-9000
(2139-2743)
9001-10,000
(2744-3048)
32-36
0.66
36-40
0.62
f. Multiply result of step f. by Btu heating value of the gas
to obtain total measured input shown in Table 4.
(Consult
EXAMPLE:
Assume
a 90,000
installed.
Assume
that the size
*Derate multiplier factors are based on midpoint altitude for altitude range.
b. When the gas supply being used has a different heating
required
b. Remove
connect
a. 129 sec. to complete
b. 3600/129
orifice size.
to obtain low stage input rate (See
pipe plug on manifold
Btu/hr,
(See Fig. 20) and
Turn on gas supply
c. Turn gas valve switch
valve pressure
pressure
decrease
to ON.
adjustment
regulator
so the low stage manifold
low stage
rate for low stage
pressure
is correctly
is 58,500
set.
rate is too low, increase
the manifold
to increase rate. If the measured low stage rate is too high,
the manifold pressure to decrease rate.
4. Verify proper
cap from low stage gas
a. Furnace
(See Fig. 19) and turn
(in) to increase
Btuh input.
input
NOTE:
Double-check
that UI is running
while clocking the low stage firing rate.
on low stage gas heat
low stage gas heat temperature
must operate
within
rise.
rise range listed on rating
plate.
low-stage
adjusting screw (3/16 or smaller flat-tipped
screwdriver)
counterclockwise
(out) to decrease rate and
clockwise
value of the gas is 1050
one revolution
= 58,590
the nonfinal
If the measured
to unit.
d. Set unit to run for 20 minutes in low-stage
gas heat
operation using the "INSTALLER
CHECKOUT"
menu
on the UI.
regulator
high stage input unit is being
of the dial is 2 cubic ft., one
= 27.9
d. 55.8 x 1050
In this example,
to unit.
manometer.
e. Remove
value of
c. 27.9 x 2 = 55.8 ft3 of gas flow/hr.
pressure
a. Turn off gas supply
if the heating
revolution
takes 129 sec., and the heating
Btu/ft3.
Proceed as follows:
value or specific gravity, refer to national and local
codes, or contact your distributor to deternfine the
2. Adjust manifold
Fig. 19).
the local gas supplier
gas is not known).
b. Select "COMFORT"
or "EFFICIENCY"
mode on User
Interface.
"COMFORT"
mode will provide a warmer
supply air temperature,
while "EFFICIENCY"
will
input rate.
provide
c. Make
lower
gas consumption.
sure access
d. Measure supply
unit as possible.
the supply
fall within
I_"NPTINLET
5. Adjust
panel is re-installed
on the unit.
and return temperatures
as close to the
Subtract the return temperature
from
temperature
to deternfine rise. Rise should
the range specified on the rating plate.
manifold
pressure
to obtain
high
stage
input
rate
(See Fig. 19).
a. Set unit to run for 20 nfinutes
in high-stage
operation using the "INSTALLER
on the UI.
b. Remove
1[2'
NPT
OUTLET
A04167
Automatic
Gas Control
Valve
clockwise
NOTE:
NOTE:
DO NOT set low stage manifold
pressure
wc or more than 2.0 in wc for natural
gas.
outside
orifices.
this range, change
f. Re-install
g. Leave manometer
NOTE:
If orifice
been re-drilled,
correct
size.
aligned
orifice
pressure
is
damaged
re-drill
an orifice.
A burr-free
pressure
outside
orifices.
this range, change
to have
main burner
high stage regulator
d. Leave manometer
6. Verify natural
for proper flame
input rate.
gas.
cap.
or it is suspected
(in) to increase
DO NOT set high stage manifold
c. Re-install
adjustment
orifice hole with a numbered
hole is essential
3. Verify natural
If manifold
cap from high stage gas
wc or more than 3.8 in wc for natural
connected.
hole appears
check
Never
main burner
low stage regulator
less than 1.4 in
adjustment
menu
valve pressure regulator (See Fig. 19) and turn
high-stage
adjusting screw (3/16 or smaller flat-tipped
screwdriver)
counterclockwise
(out) to decrease rate and
J
Fig. 19 - Redundant
regulator
gas heat
CHECKOUT"
and squarely
cap.
gas high stage input rate.
b. If unit is not running,
characteristics.
adjustment
pressure
connected.
a. Turn off all other gas appliances
the gas meter.
drill bit of the
less than 3.2 in
If manifold
and pilots
set unit to run for 20
served by
nfinutes
high stage gas heat operation using the "INSTALLER
CHECKOUT"
menu on the User Interface.
gas low stage input rate.
24
in
is
c.Record
number
ofseconds
forgasmeter
tocomplete
onerevolution.
d.Divide
number
ofseconds
instep
c.into3600(number
ofseconds
in1hour).
e.Multiply
result
ofstepd.bythenumber
ofcubic
feet
shown
foronerevolution
oftestdialtoobtain
cubic
feet
ofgasflowperhour.
f. Multiply
result
ofstepf.byBtuheating
value
ofthegas
toobtain
totalmeasured
inputshown
inTable
4.
(Consult
thelocalgassupplier
iftheheating
value
of
gasisnotknown).
EXAMPLE:
Assume
a 90,000
highstage
inputunitis being
installed.
Assume
thatthesizeof thedialis 2 cubicft.,one
revolution
takes
84sec.,
andtheheating
valueofthegasis 1050
Btu/ft3.
Proceed
asfollows:
a.84sec.
tocomplete
onerevolution
b.3600/84
=42.9
c.42.9x2=85.8ft3ofgasflow/hr.
d.85.8x1050=90,090
Btuhinput.
Inthisexample,
thenominal
inputrateforhighstage
is 90,000
Btu/hr,
sothehighstage
manifold
pressure
iscorrectly
set.
If themeasured
highstage
rateistoolow,increase
themanifold
pressure
toincrease
rate.If themeasured
highstage
rateis too
high,
decrease
themanifold
pressure
todecrease
rate.
NOTE:Double-check
thatUser
Interface
isrunning
onhighstage
gasheat
whileclocking
thelowstage
firingrate.
7.Verify
proper
highstage
gasheat
temperature
rise.
a.Furnace
must
operate
withinriserange
listed
onrating
plate.
b.Make
sureaccess
panel
isre-installed
ontheunit.
c.Measure
supply
andreturn
temperatures
asclose
tothe
unitaspossible.
Subtract
thereturn
temperature
from
thesupply
temperature
todetermine
rise.Riseshould
fallwithintherange
specified
ontherating
plate.
NOTE:If thetemperature
riseisoutside
therating
plate
range,
firstcheck:
a.Gas
inputforlowandhighstage
gasheat
operation.
b.Derate
foraltitude,
if applicable.
c.Return
andsupply
ducts
forexcessive
restrictions
causing
static
pressures
inexcess
of.5in.wc.
d.Make
sure
model
plugisinstalled.
8.FinalCheck
a.Turnoffgastounit
b.Remove
manometer
frompressure
tap.
c.Replace
pipeplugonmanifold
(See
Fig.20).
d.Turnongastounit.
e.Check
forleaks.
CHECK
GASINPUT
(PROPANE
GAS)
Refer
topropane
kitinstallation
instructions
forproperly
checking
gasinput.
NOTE: Forinstallations
below2,000
ft (610ram),refertothe
unit ratingplatefor properpropane
conversion
kit. For
installations
above
2,000ft, contact
yourdistributor
forproper
propane
conversion
kit.
CHECK
BURNER
FLAME
Withburneraccess
panelremoved,
observe
theunitheating
operation.
Watch
theburner
flames
toseeif theyarelightblueand
softinappearance,
andthattheflames
areapproximately
thesame
foreach
burner.
Propane
willhave
blueflame
(See
Fig.21).Refer
totheMaintenance
section
forinformation
onburner
removal.
MANIFOLD
PIPE PLUG
099019
Fig. 20 - Burner
Assembly
BURNER FLAME
BURNER
MANIFOLD
C99021
Fig. 21 - Monoport
LIMIT
Burner
SWITCHES
Normally
closed limit switch (LS) completes
the control circuit.
Should
the leaving-air
temperature
rise above the maximum
allowable
temperature,
the limit switch
opens and the control
circuit "breaks." Any interruption
in the control circuit instantly
closes the gas valve and stops gas flow to the burners and pilot.
The blower motor continues
to run until LS resets. The furnace
board
STATUS
LED will display
STATUS
CODE
33.
When
the air temperature
at the limit switch
drops to the
low-temperature
setting of the limit switch, the switch closes and
completes
the control circuit. The direct-spark
ignition
system
cycles
and the unit returns to normal
ROLLOUT
heating
operation.
SWITCH
The function of the rollout switch is to close the main gas valve in
the event of flame rollout. The switch is located above the main
burners. When the temperature
at the rollout switch reaches the
maximum
allowable
temperature,
the control circuit trips, closing
the gas valve and stopping
motor
board
25
gas flow to the burners.
The indoor
(IFM) continues
to run until switch is reset. The
STATUS LED will display STATUS CODE 33.
fan
furnace
Table
HEATING
INPUT(BTU/HR)*
6 - Heating
Inputs
GAS SUPPLY PRESSURE
Natural
NUMBER OF
ORIFICES
(IN. WC)
MANIFOLD
PRESSURE (IN. WC)
Natural
High Stage
Low Stage
Min
Max
40,000
26,000
2
4.0
13.0
60,000
39,000
3
4.0
13.0
3.2-3.8
1.4 - 2.0
90,000
58,500
3
4.0
13.0
3.2-3.8
1.4 _ 2.0
115,000
75,000
3
4.0
3.2-3.8
1.4 _ 2.0
130,000
84,500
3
4.0
13.0
13.0
3.2-3.8
1.4 _ 2.0
High Stage
3.2-3.8
Low Stage
1.4 - 2.0
*Cubic ft of natural gas per hour for gas pressures of .5 psig (14 in. wc) or less and a pressure drop of .5 in. wc (based on a .60 specific gravity gas). Ref: Table
6.2 (b) NFPA54/ANSI Z223.1-2006.
CONTINUOUS
When
FAN MODE
continuous
NOTE:
fan operation
is requested
by the User Interface
indoor
fan motor will operate
at continuous
blower
airflow.
Continuous
fan operation
is programmable.
See the User Interface
Owner's
Manual
for detailed
instructions.
Terminal
EAC-I
is
energized
During
as long as the indoor
a call for gas heat,
3. Check
control
will
transition
quickly,
The
ignite, then shut OFF and remain
OFF for the
delay allowing the heat exchangers
to heat up more
then restarts
indoor
at the end of the blower-ON
fan motor
after the gas heating
will
revert
delay period.
to continuous-blower
airflow
cycle is completed.
When the UI "calls for cooling", the indoor fan motor
to operate at cooling airflow. When the call for cooling
the indoor fan
cooling airflow
airflow.
When
motor will operate
before transitioning
the call for continuous
will switch
is satisfied,
an additional
90 seconds
back to continuous-blower
fan is removed,
the indoor
at
COMPONENT
The Infinity
Furnace
Board features
a gas component
test system to
are no UI inputs to the control (the ABCD
connector
removed from the Infinity control board for this operation)
time delays have expired. Turn on setup switch SWI-6.
NOTE:
The component
is receiving
test feature will not operate
any UI signals
The component
or until all time delays
test sequence
1. The control turns
through step 3.
control
seconds,
motor
ON and keeps
then
turns
the control
turns
ON
fan
motor
on
for
15
then OFF.
The
EAC
terminals
are energized
when
runs the
the blower
is
operating.
After
test is completed,
one or more
(11, 25, or 41) will flash. See component
Code Label for explanation
of status codes.
NOTE:
To repeat component
OFF and then back ON.
Check
for Refrigerant
Locate and repair refrigerant
1. Use both
pressure
2. Repair
high-
and reclaim
test section
test, turn setup
switch
codes
or Status
SWI-6
to
Leaks
leaks and charge the unit as follows:
remaining
ports
refrigerant.
accepted practices.
to relieve
given
AND
Instructions
system
in
the
Pre-Start-Up
HEATING
for detailed
AND ADJUSTING
Any adjustment
NOTE:
in HIGH
system
the unit
charge.
condition
insufficient
charge
of not
Puron
(R-410A)
must be done with
charge
having
label and the tables
and pressures
label is attached
in heat pump
in cooling
heating
If a substantial
shown
reclaim
information
evaluating
is not required
proper
only.
A refrigerant
the
level
and
may be obtained
refrigerant
factory
adjustment
all refrigerant
charge,
an
charge must always be
is indicated,
an abnormal
exists somewhere
in the cooling
system,
airflow across either coil or both coils.
REFRIGERANT
R-410A
refer to system
of the unit. If charge
mode,
to the specified
the
mode
to the outside
When
adjustment
CHARGE
with
of the refrigerant
charge to rating plate amount. (This
from the physical data table also.)
indicated
CHECKOUT.
REFRIGERANT
to refrigerant
is suspected
The charging
CONTROL
stage.
Adjustment
unless
such
as
CHARGE
The amount of refrigerant charge is listed on the unit rating plate
and/or the physical data table. Refer to the Refrigeration
Service
Manual,
Refrigerants
Section.
NO CHARGE
Check
for leak. Use standard
evacuating
techniques.
After
evacuating
system, weigh in the specified
amount of refrigerant
(refer to system
LOW
and low-pressure
leak following
status
procedures
COOLING
unit operating
Techniques
the component
required
very minimal.
the indoor
using a
Refer to
damage.
NOTE:
is suspect
it ON
the igniter
4. After shutting the blower motor OFF, the control
inducer for 10 seconds, then turns it OFF.
NOTE:
compressor
charging
have expired.
if no
when the outdoor
temperature
is below 40°F (4.4°C)
(unless
low-ambient
operation
is enabled in the UI). Do not rapid cycle
the compressor.
Allow 5 min. between
"on" cycles to prevent
temperatures
if the control
refrigerant
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in cooling mode
IMPORTANT:
2. After waiting 10 seconds,
for 15 seconds, then OFF.
3. The
can be
and all
is as follows:
the inducer
the
The refrigerant
system
is fully charged
refrigerant and is tested and factory sealed.
in the case of a gas component
test procedure,
ensure that there
method.
and reclaim
Adjustments
Complete
CHECKING
TEST
help diagnose a system problem
failure. To initiate the component
Start-Up
See UI Installation
blower
has been opened
for leaks using an approved
refrigerant
system
leaks are found.
CHECKING
OPERATION
will continue operating
for an additional 5 seconds before shutting
down, if no other function requires blower motor operation.
the system
5. Charge
unit with Puron
(R-410A)
refrigerant,
volumetric-charging
cylinder
or accurate scale.
unit rating plate for required charge.
the
indoor fan motor to continuous
blower airflow or gas heat airflow,
whichever
is lowest. The indoor fan motor will remain ON until
the burners
blower-ON
system
4. Evacuate
additional
fan motor is energized.
the Infinity
Install a filter drier whenever
for repair.
CHARGE
rating plate).
COOLING
Use Cooling Charging Chart (Fig. 23). Vary refrigerant
until the
conditions
of the chart are met. Note that charging
charts are
different from type normally
used. Charts are based on charging
the units to correct subcooling
for the various operating conditions.
Accurate
pressure
gauge
and temperature
sensing
devices
are
required.
Connect
the pressure gauge to the service port on the
suction line. Mount the temperature
sensing device on the suction
26
line and
reading.
range of
TO USE
insulate it so that the outdoor ambient does not affect the
Indoor air CFM must be within the normal operating
the unit.
COOLING CHARGING CHARTS
Take the liquid line temperature and read the manifold pressure
gauges.
Refer to the chart to determine what the liquid line temperature
should be.
NOTE:
If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.
NON-COMMUNICATING
EMERGENCY
HEATING MODE: 4-WIRE THERMOSTAT
COOLING
/
established with the UI, the Infinity furnace board will enable the
standard thermostat input terminals to allow simple thermostatic
control of the 48XT unit.
For control with a standard thermostat, disconnect the ABCD
connectors from both control boards and using No. 18 AWG
color-coded, insulated type 90°C minimum or equivalent wire,
make the connections between the standard thermostat, the furnace
board, and the HP/AC board per Fig. 22. Recommend the use of
interconnecting wire with 105C, 600V, 2/64" insulation.
The Infinity control will respond to cooling and heating demands
with the maximum safe airflow based on gas furnace output and
unit cooling capacity.
This mode of operation is provided only in the case where the UI
has failed or is otherwise unavailable. If communications cannot be
infinity HP/AC
Board
infinity Furnace
Board
OAT
Outdoor Air Thermistor
(Supplied with IU)
FIELD CONNECTION
REQUIRED
(BLACK WIRES)
B
Standard
4=Wire
Thermostat
OCT
W2
Y1
HUM
Outdoor Coil Thermistor
FACTORYCONNECTED
G
_OM
0
I/W1
Y2
_H2
Y1
R
FACTORY
WIRESPROVIDED
FORFIELDCONNECTION
OFUTiLiTYCURTAILMENT
Wl
C
R
m
LEGEND
Jumped Wires ,=,,,=,==
Field Wiring
,,,, ,==
A06303
Fig. 22 - Non-Communicating
Emergency
Cooling/Heating
27
Wiring
Connections
Required LiquidLine Temperaturefor a SpecificSubcoolin9(R-410A)
Required Subcooling°F (°C)
Outdoor Ambient Temperature
Required Subcoolin 9 (°F)
Pressure
5
10
15
(psi_l)
56
51
46
174
59
54
49
181
61
56
51
188
ModelSize
75 (24)
82 (28)
85 (29)
95 (35)
024
O30
036
I5,5(8,6)
16,8(9,3)
14(7,7)
042
048
060
19.2( 10.7 ) I9,1 ( I0,6 } 19.1 ( 10.6)
21(11.6)
20.8(11.5) 20.7(11.5)
16.2(9)
16.6(9.2)
16,8(9.3)
105 (41)
15,6(8,7)15.7(8.7)15.8(8.8)I5,9(8,9)
16,4(9,1)
I6.2(9)
15.6(8.7)
15(8.3)
13,9(7,7)
13.9(7.7)
13.8(7.7)13,7(7,6)
Required Subcooiing
Pressure
3
6
(kPa)
1200
13
11
1248
15
12
1298
16
13
25
38
39
41
(°C)
8
14
8
9
10
2
4
5
18,9( 19,5) 18,7 ( 10,4)
20,4(11,3) 20,2(11,2)
17.3 (9.6)
17.8(9.9)
195
202
209
216
223
230
83
65
67
69
71
73
58
60
62
64
66
68
53
55
57
59
61
63
43
45
47
49
51
53
1344
1393
1441
1489
1537
1586
17
18
20
21
22
23
14
16
17
18
19
20
12
13
14
15
16
17
6
7
9
10
11
12
I- MeasureDischargeline pressureby attaching a gaugeto the serviceport.
._-Measurethe Liquid line temperatureby attachinga temperaturesensingdevice to it,
3- insulatethe temperaturesensingdevice so that the OutdoorAmbientdoesn't affect
237
244
251
259
267
275
283
291
299
308
317
326
335
344
353
363
373
383
393
403
413
423
433
443
453
463
473
483
493
503
513
523
533
75
77
79
81
83
85
87
89
91
93
95
97
99
10I
102
I04
106
108
110
112
114
116
117
119
I21
122
124
126
127
t29
t30
t32
133
70
72
74
76
78
80
82
84
86
88
90
92
94
96
97
99
101
103
105
107
109
111
112
114
116
117
119
121
122
124
125
127
128
65
67
69
71
73
75
77
79
81
83
85
87
89
91
92
94
96
98
100
102
104
106
107
109
111
112
114
116
117
119
120
122
123
55
57
59
61
63
68
67
69
71
73
75
77
79
81
82
84
86
68
90
92
94
96
97
99
101
102
104
108
107
109
I10
I12
113
1634
1682
1730
1786
1841
1896
1951
2006
2061
2123
2185
2247
2309
2372
2434
2503
2571
2640
2709
2778
2847
2916
2985
3054
3123
3192
3261
3330
3399
3468
3537
3606
3675
24
25
26
27
28
29
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
56
21
22
23
24
26
27
28
29
30
3t
32
33
34
35
36
37
39
40
41
42
43
44
45
46
47
47
48
49
50
51
52
53
54
19
20
21
22
23
24
25
26
27
28
29
30
31
33
34
35
36
37
38
39
40
4I
42
43
44
45
46
47
47
48
49
50
51
13
14
15
16
17
18
19
20
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
44
45
3harqinqProcedure
:hereading.
,_-Referto the requiredSubcootingin the table based on the model sizeand the
DutdoorAmbienttemperature,
3- interpolateif the Outdoortemperatureties inbetweenthe table values.Extrapolateif
:hetemperaturelies beyondthe table range.
_- Findthe PressureValue correspondingto the the measuredPressureon the
3ompressorDischargeline,
_'-Readacrossfrom the Pressurereadingto obtainthe Liquidline temperaturefor a
•equiredSubcooling.
3-Add Cha_e if the measuredtemperatureis higherthanthe liquid linetemperature
/alue in the _ble.
)- Add Cha_e usingthe se_ice connedion on the Suctionline of the Compressor.
50DU500166_2,0
A08423
Fig.
23
- Cooling
7 - ECM
Table
Charging
Wet
Coil
Table-Subcooling
Pressure
Drop
(in. w.c.)
UNIT
SIZE
600
700
800
900
1000
024
0.005
0.007
O.O10
O.O12
O.O15
O.OO7
O.O10
O.O12
O.O15
O.O18
O.O21
O.O24
O.O19
O.O23
O.O27
O.O32
O.O37
O.O42
O.O47
O.O14
O.O17
O.O20
O.O27
O.O24
O.O32
O.O27
O.O36
030
036
042
048
STANDARD CFM (SCFM)
1200
1300
1400
1500
1100
060
Table
FILTER SIZE
in.(mm)
20x20x1
(508x508x25)
24x30x1
(610x762x25)
24x36x1
(610x914x25)
8 - Filter
Pressure
Drop
1700
1800
1900
2000
O.O31
O.O41
O.O35
O.O46
O.O39
O.O52
O.O43
O.O57
O.O63
O.O68
O.O29
O.O32
O.O36
O.O40
O.O45
O.O49
Table
CFM
1400
1500
500
600
700
800
900
1000
1100
1200
0.05
0.07
0.08
0.1
0.12
0.13
0.14
0.15
0.05
0.6
0.07
0.07
0.08
0.09
0.1
0.06
0.07
0.07
0.08
....
.......
1300
1600
2100
0.053
(in. w.c.)
1600
1700
1800
1900
2000
2100
2200
2300
0.09
0.10
0.11
0.12
0.13
0.14
0.14
...........
28
........
0.09
7. Inspect all accessories. Perform any service or maintenance
to the accessories as recommended in the accessory
instructions.
MAINTENANCE
To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This HYBRID HEAT unit
should be inspected at least once each year by a qualified service
person. To troubleshoot unit, refer to Table 10, Troubleshooting
Chart and additional
information
int he Start-Up
and
Troublshooting section.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
Air
Filter
IMPORTANT:
Never
in the return-air duct
same dimensional size
for recommended filter
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during
each cooling season and twice during the heating season, or
whenever the filter becomes clogged with dust and lint.
Indoor
PERSONAL
HAZARD
INJURY
AND
UNIT
DAMAGE
Failure to follow this warning could result in personal
injury or death and possible unit component damage.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills,
tools and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment,
other than those procedures recommended in the Owner's
Manual.
operate the unit without a suitable air filter
system. Always replace the filter with the
and type as originally installed. See Table 1
sizes.
Fan and Motor
NOTE: All motors are pre-lubricated.
these motors.
Do not attempt to lubricate
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
Inducer
Blower
NOTE: All motors are pre-lubricated.
these motors.
Do not attempt to lubricate
Clean periodically to assure proper airflow and heating efficiency.
Inspect blower wheel every fall and periodically during the heating
season. For the first heating season, inspect blower wheel
bi-monthly to determine proper cleaning frequency.
Limit Switch
ELECTRICAL
SHOCK
Failure to follow
injury or death:
HAZARD
these warnings
1. Turn off electrical
power
performing
any maintenance
2. Use extreme
caution
3. Never place anything
with the unit.
could
result
in personal
to the unit and tag before
or service on this unit.
when removing
combustible
panels
and parts.
either on or in contact
Remove unit access panel to gain access to the limit switch. The
limit switch is located above the indoor blower housing.
NOTE:
On small chassis units, a second limit switch is located
beside the indoor blower housing.
Burner
[]nit is equipped with a direct spark ignition 100 percent lockout
system. Ignition module is located in the control box. Module
contains a self-diagnostic LED. During servicing, refer to label
diagram for LED interpretation.
Main
[]NIT OPERATION
HAZARD
Ignition
Burners
At the beginning of each heating season, inspect for deterioration
or blockage due to corrosion or other causes. Observe the main
burner flames and adjust, if necessary.
Failure to follow this caution may result in equipment
damage or improper operation.
Errors made when reconnecting wires may cause improper
and dangerous
operation. Label all wires prior to
disconnecting when servicing.
EQUIPMENT
DAMAGE
HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
When servicing gas train, do not hit or plug orifice spuds.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.
Removal
To remove
of Gas Train
the gas train for servicing:
1. Shut off main gas valve.
2. Shut off power
3. Inspect indoor fan motor and wheel for cleanliness each
cooling season. Clean when necessary.
3. Remove
4. Disconnect
4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.
5. Check for restrictions on inducer outlet. Clean flue hood.
to unit.
unit access
5. Remove
wires connected
6. Remove
ignitor
8. Slide the burner
9. To reinstall,
29
at unit gas valve.
to gas valve.
and sensor
7. Remove the mounting
the unit base.
6. Inspect burner compartment before each heating season for
rust, corrosion, soot or excessive dust.
panel.
gas piping
Mark each wire.
wires at the ignitor
screw that attaches
module.
the burner
rack out of the unit.
reverse
the procedure
outlined
above.
rack to
Inducer
Pressure
Switch
Inspect pressure switch
for cracks or restrictions.
connections.
Inspect
Replace if needed.
ELECTRICALSHOCK
Failure to follow
injury or death.
pressure
switch
tube
HAZARD
this warning
could
result
infinity Top
in personal
A06035
Disconnect
and tag electrical
power to the unit
cleaning and lubricating the blower motor and wheel.
UNIT SIZE
before
Outdoor Coil, Indoor Coil, and Condensate
Drain Pan
Inspect
the condenser
coil, evaporator
coil, and condensate
drain
"A"
DIM. IN. (MM)
024
1 (26)
030
1 (26)
036
1 (26)
042
1 (26)
048
11/32 (9)
060
9/16 (3 4)
pan at least once each year.
The coils are easily cleaned
the coils either before
obstructions,
including
when
dry; therefore,
inspect
and clean
Fig. 24 - Outdoor
or after each cooling season. Remove
all
weeds and shrubs, that interfere with the
airflow through the condenser
coil. Straighten bent fins with a fin
comb. If coated with dirt or lint, clean the coils with a vacuum
cleaner, using the soft brush attachment.
Be careful not to bend the
fins. If coated with oil or grease, clean the coils with a mild
detergent and water solution. Rinse coils with clear water, using a
garden
hose. Be careful
wiring, or air filter(s).
from inside to outside
not to splash
water on motors,
condenser coil, be sure to clean between
all dirt and debris from the unit base.
Inspect
the drain
insulation,
For best results, spray condenser
the unit. On units with an outer
pan and condensate
coil fins
and inner
the coils. Be sure to flush
drain
line when
Electrical
Inspect
Controls
and check
Clearance
and Wiring
the electrical
sure to turn off the electrical
Remove
Fan Blade
controls
power
access panel to locate
and wiring
annually.
Be
to the unit.
all the electrical
controls
and wiring.
Check all electrical connections
for tightness.
Tighten all screw
connections.
If any smoky or burned
connections
are noticed,
disassemble
the connection,
clean all the parts, re-strip
the wire
end and reassemble
After
inspecting
the connection
the electrical
properly
controls
and securely.
and wiring,
replace
all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation.
If discrepancies
are observed in
inspecting
the coils. Clean the drain pan and condensate
drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation,
motor, wiring, or
operating
cycle, or if a suspected malfunction
has occurred, check
each
electrical
component
with
the
proper
electrical
instrumentation.
Refer to the unit wiring label when making these
checks.
air filter(s). If the drain trough
is restricted,
"plumbers snake" or similar probe device.
Refrigerant
Outdoor
clear
it with
a
Fan
Circuit
Inspect all refrigerant tubing connections
and the unit base for oil
accumulation
annually.
Detecting
oil generally
indicates
a
refrigerant leak.
If oil is detected
UNIT
OPERATION
Failure to follow
components.
HAZARD
this caution
may result in damage
or if low performance
to unit
If no refrigerant leaks are found
refer to Checking and Adjusting
Keep the outdoor fan free from all obstructions
to ensure
proper cooling operation. Never place articles on top of the
unit.
Indoor
2. Turn
4 screws
motor/grille
expose
3. Inspect
holding
assembly
outdoor
grille
upside
down
and motor
on top
to top
cover
to
fan blade.
the fan blades
for cracks
loosen setscrew
and slide fan off
5. When
position
according
replacing
6. Ensure
fan blade,
to the
in Fig. 24.
that set screw
shaft when tightening.
7. Replace
blade
grille.
engages
and low performance
is suspected,
Refrigerant
Charge section.
airflow does not require
is suspected.
If a problem
sure that all supplyand return-air
grilles are open
obstructions,
and that the air filter is clean.
Metering
Devices-TXV
& AccuRater
the flat area on the motor
checking
exists, be
and free from
® Piston
This unit uses 2 types of metering devices. The outdoor
device is a fixed orifice and is contained in the brass-hex
or bends.
4. If fan needs to be removed,
motor shaft.
table shown
leak test all
Airflow
The heating
and/or cooling
unless improper performance
1. Remove
cover.
is suspected,
refrigerant tubing using an electronic leak detector, or liquid-soap
solution.
If a refrigerant
leak is detected,
refer to Check for
Refrigerant
Leaks section.
metering
body in
the liquid line feeding the outdoor coils. The indoor
metering
device is a TXV-type
device. No maintenance
should be required.
Pressure
Pressure
Switches
switches
- Refrigerant
are protective
devices
Circuit
integrated
into the control
circuit (low voltage). They shut off compressor
if abnormally
high
or low pressures
are present in the refrigeration
circuit. These
pressure switches are specifically
designed to operate with Puron
(R-410A)
systems. R-22 pressure
switches must
replacements
for the Puron (R-410A)
system.
30
not be used
as
Loss-of-Charge
(Low Pressure)
REFRIGERANT
Switch
This switch is located on the liquid line and protects against
suction pressures caused by such events as loss of charge,
low
low
airfow
across indoor coil, dirty filters, etc. It opens if the system
pressure drops to about 20 psig. If system pressure is above this,
switch should be closed.
UNIT
High-Pressure
Failure to follow
iniury or equipment
Switches
(HPS & HPS2)
The high-pressure
switches are located on the discharge
protects against excessive condenser
coil pressure. HPS
670 psig shutting down
limiting the compressor
the compressor,
while
to low-stage
operation
High pressure may be caused by a dirty
motor, or outdoor air recirculation.
line and
opens at
HPS2 opens
only.
outdoor
fan
To check switches:
COMPRESSOR
1. Turn off all power
2. Disconnect
3. Apply
NOTE:
system
meter
Because
under
leads
on a good
these
pressure,
across
switch.
switches
are
attached
it is not advisable
unless you are reasonably
must be removed, remove
charge
so that
pressure
without
breaking
Copeland
Scroll
The compressor
used
operate
with
Puron
interchanged.
The compressor
Exercise extreme
have
read
this device for
certain that a problem
and recover all system
0 psi.
Never
open
system
with dry nitrogen.
Compressor
this warning
damage.
(Puron
Refrigerant)
designed
cannot
is an electrical,
as well as mechanical,
caution when working near compressors.
to avoid exposure
for most troubleshooting
safety hazards.
to
be
device.
Power
techniques.
SYSTEMS
even
if
Synthetic
Roof
1. Cover
refrigerant
Precautionary
throughout
the system
working
(plastic)
10x10
drip
by
pressure.
3MA
POE
oil.
LIQUID-LINE
up,
of the 48XT,
including
may
the
roofs containing
charging.
cause
include, but are not
refrigerant leaks, and
as filter drier, pressure
or reversing valve.
area
cloth
with
or
an in, permeable
tarp.
Cover
an
panel with a terry
spills and prevent
drop cloth from tears caused by tools
inside
unit immediately
under
run-offs
service.
BI-FLOW
of any oil-contaminated
FILTER
material
per
DRIER
The bi-flow
filter drier is specifically
designed
Puron. Use only factory-authorized
components.
to operate with
Filter drier must
be replaced whenever
the refrigerant
system is opened.
When
removing
a filter drier, use a tubing cutter to cut the drier from the
system. Do not unsweat a filter drier from the system. Heat from
unsweating
system.
PURON
Refer
System
required
5. Remove and dispose
local codes.
will release
(R-410A)
moisture
REFRIGERANT
to unit information
refrigerant
refrigerant
compressor
oil needed,
servicing
systems
on
synthetic materials, the filter drier, and refrigerant
to cause long
component(s)
to be serviced and prevent lubricant
through the louvered openings in the unit base.
high pressure.
The
550 and 625 psi
The Copeland
scroll compressor
uses Mobil
This is the only oil allowed for oil recharge.
SYNTHETIC
ft (3x3 m) area.
3. Place terry cloth shop towel
device and an internal pressure-relief
port. The anti-rotational
device prevents the scroll from turning backwards
and replaces the
need for a cycle protector.
The pressure-relief
port is a safety
extreme
between
oil, Mobil
it absorbs
Procedure
roof
run-offs,
and protect
or components.
more tolerant of stresses caused by debris, liquid slugging,
and
flooded starts. The compressor
is equipped with an anti-rotational
system
cleaned
2. Cover area in front of the unit service
cloth shop towel to absorb lubricant
the interaction
of a stationary
and an orbiting scroll. The scroll
compressor
has no dynamic suction or discharge valves, and it is
This step covers the refrigerant
immediately
extended
4. Perform
Refrigerant
WITH
lubricants are known
roofing materials.
replacing
refrigerant
components
such
switch, metering device, coil, accunmlator,
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from
refrigerants and oils.
device, designed
to protect
against
relief port has an operating
range
ROOFS
roofing.
Procedures
which risk oil leakage
limited to, compressor
replacement,
repairing
Failure to follow this warning could result in personal
iniury or death and/or property damage.
differential
in personal
embrittlement
(leading to cracking)
to occur in one year or more.
When
performing
any service
that may
risk exposure
of
compressor
oil to the roof, take appropriate
precautions
to protect
FIRE HAZARD
pumps
result
of the oil to the atmosphere.
ON
POE (polyolester)
compressor
term damage to some synthetic
approximate
The scroll compressor
could
OIL
polyethylene
EXPLOSION,
HAZARD
POE oils can absorb 15 times as much water as other
for HCFC and CFC refrigerants.
Take all necessary
SERVICING
MATERIALS
Exposure,
in this product
is specifically
(R-410A)
refrigerant
and
should be shut off, if possible,
Refrigerants
present additional
water readily.
oils designed
precautions
to refrigeration
to remove
troubleshooting
exists. If switch
vacuum
You should
switch.
gauges
SAFETY
The compressor
in this system uses a polyolester
(POE)
3MA POE. This oil is extremely
hygroscopic,
meaning
leads on switch.
ohm
continuity
to unit.
AND
This system uses Puron (R-410A)
refrigerant
which has
higher operating pressures than R-22 and other refrigerants.
No other refrigerant may be used in this system. Gauge set,
hoses, and recovery
system nmst be designed
to handle
Puron.
If you
are unsure,
consult
the
equipment
manufacturer.
at 565,
coil, failed
OPERATION
cylinders
cylinder
manifold
cylinders
to flow
and contaminants
from drier into
CHARGING
plate and charging
chart.
contain
a dip tube
to
from cylinder
in upright
Some
R-410A
allow
liquid
position.
For
equipped
with a dip tube, charge Puron units with
in upright position and a commercial
metering device in
hose. Charge refrigerant into suction line.
TROUBLESHOOTING
LED DESCRIPTION
LEDs built into Infinity control boards provide installer or service
person information
concerning
operation
and/or fault condition
of
31
theunitcontrols
andECMmotor.Thisinformation
is also BROWN
OUTPROTECTION
available
atthesystem
UI in textwithbasictroubleshootingIf thelinevoltage
is lessthan187vforatleast4 seconds,
the
instructions.
Careful
useofinformation
displayed
willreduce
the
appropriate
compressor
contactor
andfanrelayarede-energized.
needfor extensive
manual
troubleshooting.
Seesection
B in
Compressor
andfanoperation
arenotallowed
untilvoltage
isa
Start-Up
andTroubleshooting
andTable5,aswellastheUI
minimum
of 190v.Thecontrol
will flashtheappropriate
fault
instructions,for additionalinformation.Additional code(See
Table
5).
Troubleshooting
information
canbefound
inTable
10.
230V LINE (POWER DISCONNECT)
DETECTION
MAJOR
COMPONENTS
If there is no 230v at the compressor
contactor
when the unit is
2-STAGE
HP/AC
BOARD
powered
and cooling demand exists, the appropriate
error code is
Thetwo-stage
HP/ACcontrolboardcontrols
thefollowing displayed. Verify that the disconnect is closed and 230v wiring is
functions:
connected
to the unit.
COMPRESSOR
VOLTAGE
SENSING
- Low-andhigh-stage
compressor
operation
- Outdoor
fanmotor
operation
The control board input terminals VS and L2 (See Fig. 18) are
- Reversing
valve
operation
used to detect compressor
voltage status, and alert the user of
- Defrost
operation
potential
problems.
The control continuously
monitors
the high
- Lowambient
cooling
voltage on the run capacitor of the compressor
motor. Voltage
- Crankcase
heater
operation
should be present any time the compressor
contactor is energized,
- Compressor
external
protection
and voltage
should
not be present
when
the contactor
is
- Pressure
switch
monitoring
(refrigerant)
de-energized.
- Timedelays
CONTACTOR
SHORTED
DETECTION
FURNACE
BOARD
If there is compressor
voltage sensed when there is no demand for
Thefurnace
board
controls
thefollowing
functions:
compressor
operation, the contactor may be stuck closed or there is
- Indoor
blower
operation
a wiring error. The control will flash the appropriate fault code.
- Gas
valve
COMPRESSOR
THERMAL
CUTOUT
- Inducer
motor
If the control senses the compressor
voltage after start-up,
and is
- Remote
sparker
module
then absent for 10 consecutive
seconds
while cooling
demand
exists, the thermal protector is open. The control de-energizes
the
- Pressure
switch
monitoring
(gas)
compressor
contactor
for
15
minutes,
but
continues
to
operate
the
SYSTEMS
COMMUNICATION
FAILURE
outdoor fan.
The control Status LED will flash the appropriate
If communication
withtheInfinityControl
islostwiththeUI,the
code shown in Table 5. After 15 minutes, with a call for low or
controls
willflashtheappropriate
faultcodes.
Check
thewiringto
high stage cooling, the compressor
contactor is energized.
If the
theUI,indoor
andoutdoor
units.
thermal protector
has not re-set, the outdoor fan is turned off. If
MODEL
PLUG
the call for cooling
continues,
the control
will energize
the
TheHP/AC
control
board
must
have
avalidmodel
plugtooperate. compressor contactor every 15 minutes. If the thermal protector
If avalidmodel
plugisnotdetected,
it will notoperate
andthe
closes (at the next 15 minute interval), check the unit will resume
control
willflashtheappropriate
faultcode,
shown
inTable
5.
operation.
PRESSURE
SWITCH
PROTECTION-REFRIGERANT If the thermal cutout trips for three consecutive cycles, then unit
operation is locked out for 4 hours and the appropriate fault code is
Theunitisequipped
withhigh-andlow-pressure
switches.
If the
displayed.
control
senses
theopening
ofahigh-orlow-pressure
switch,
it
NO 230V AT COMPRESSOR
willrespond
asfollows:
If the compressor
voltage
is not sensed when the compressor
1.De-energize
thecompressor
contactor
(HPS1
&LPS)orthe
compressor
solenoid
contactor
(HPS2).
should be starting, the contactor may be stuck open or there is a
wiring error.
The control will flash the appropriate
fault code.
2.Keep
theoutdoor
fanoperating
for15minutes.
Check the contactor and control box wiring.
3.Display
theappropriate
faultcodes.
TROUBLESHOOTING
UNIT
FOR
PROPER
SWITCHING
4.Aftera15minute
delay,
if there
isstillacallforcooling
and BETWEEN LOW & HIGH STAGES
theLPSor HPSis reset,
thecompressor
contactor
is
Check the suction pressures at the service valves.
Suction pressure
energized.
should be reduced by 3-10%
when switching
from low to high
5.If LPSorHPShasnotclosed
aftera 15minute
delay,
the
outdoor
fanisturned
off.If theopen
switch
closes
anytime capacity.
NOTE:
The liquid pressures are very similar between low and
after
the15-minute
delay,
thenresume
operation
withacall
high stage operation,
so liquid pressure should not be used for
forcooling.
troubleshooting.
6.If LPSorHPStrips3consecutive
cycles,
theunitoperation
Compressor
current should increase 20-45% when switching from
islocked
outfor4hours.
low to high stage.
The compressor
solenoid, when energized in
7.Intheevent
ofahigh-pressure
switch
triporhighpressure high stage, should measure
24vac.
lockout,
check
therefrigerant
charge,
outdoor
fanoperation COMPRESSOR INTERNAL RELIEF
andoutdoor
coilforairflow
restrictions.
8.Intheevent
of alow-pressure
switch
triporlowpressure The compressor is protected by an internal pressure relief (IPR)
which
relieves
discharge
gas
into
compressor
shell
when
lockout,
check
therefrigerant
charge
andindoor
airflow.
differential between suction and discharge pressures exceeds
550 CONTROL
FAULT
625 psi. The compressor
is also protected by an internal overload
If theHP/AC
control
board
hasfailed,
thecontrol
will flashthe
attached to motor windings.
appropriate
faultcode(See
Table
5).Thecontrol
board
should
be
replaced.
32
TEMPERATURE
THERMISTORS
Thermistors
areelectronic
devices
whichsense
temperature.
Asthe
temperature
increases,
theresistance
decreases.
Thermistors
are
used
tosense
outdoor
ambient
(OAT)
andcoiltemperature
(OCT).
Refer
toFig.25forresistance
values
versus
temperature.
See
Fig.
26forOCTlocation.
THERMISTOR
9O
I
I
If there is a thermistor out of range error, defrost will occur at each
time interval during heating operation, but will terminate after 5
minutes.
Refer to the Troubleshooting
troubleshooting information.
CURVE
I
If the OCT sensor should fail, low ambient cooling will not be
allowed. Defrost will occur at each time interval during heating
operation, but will terminate after 5 minutes.
Chart (Table 10) for additional
I
8o- k----4------ 4-----M------ 4-------I
....
\
i
i
7o- -'_-- _------
i
i
I----- _------
i
T------I ....
:I::
6o- ---XwJ.-------I----_------ J-------I
....
\i
i
i
i
i
50....
40- -
N-----1-----_------1------JN.__k__J___2___l
30....
20....
_----_-<_----_------ I-------I
....
_ ______/'_._/__
____/ ____--I ....
lo ....
H---
i\
i
i
i
i
_
i
i
I....
....
i
i
t---_--_--
o ..................
I...................
I...................
I...................
I...................
I,,-,_
0
20
40
60
TEMPERATURE
80
100
120
(DEG. F)
A91431
Fig. 25 - Resistance Values Versus Temperature
If the outdoor ambient or coil thermistor should fail, the HP/AC
control will flash the appropriate fault code (See Table 5).
IMPORTANT:
Coil thermistor is factory mounted.
Check to
insure thermistor is mounted properly. Outdoor air thermistor
(OAT) is field mounted and connected. Verify that the OAT has
been properly installed.
THERMISTOR SENSOR COMPARISON
The control continuously monitors and compares the outdoor air
temperature sensor and outdoor coil temperature sensor to ensure
proper operating conditions. The comparison is:
• In cooling mode, if the outdoor air sensor indicates -> 10 °F
F
A06311
Fig. 26 - Outdoor
FINAL
IMPORTANT:
CHECKS
Before leaving job, be sure to do the following:
3. Tighten service valve stem caps to 1/2-turn
tight.
• In heating if the outdoor air sensor indicates ->35 °F (2 ° C)
past finger
4. Leave Users Manual with owner. Explain system operation
and periodic maintenance requirements outlined in manual.
warmer than the coil sensor (or) the outdoor air sensor indicates
->10°F (-12°C) cooler than the coil sensor, the sensors are out
5. Fill out Start-Up Checklist located at the back of this
manual and place in customer file.
of range.
Factory defaults have been provided in the event of failure of
outdoor air thermistor and/or coil thermistor.
Attachment
2. Ensure that all wiring and tubing is secure in unit before
adding panels and covers. Securely fasten all panels and
covers.
are out of range.
The thermistor comparison is not performed during low ambient
cooling operation.
FAILED THERMISTOR DEFAULT OPERATION
(OCT)
1. Ensure that all wiring is routed away from tubing and sheet
metal edges to prevent rub-through or wire pinching.
(-12°C) warmer than the coil sensor (or) the outdoor air sensor
indicates ->20°F (-7°C) cooler than the coil sensor, the sensors
If the sensors are out of range, the control will flash the appropriate
fault code as shown in Table 5.
Coil Thermistor
CARE AND MAINTENANCE
For continuing
high
performance
and to minimize
possible
equipment
failure, periodic maintenance
must be performed on this
equipment.
Frequency
areas,
such
information.
If the OAT sensor should fail, low ambient cooling will not be
allowed and the one-minute outdoor fan off delay will not occur.
Defrost will be initiated based on coil temperature and time.
33
of maintenance
as
coastal
may vary depending
applications.
See
upon
Users
geographic
Manual
for
HEAT PUMP WITH
REFRIGERATION
SECTION
PURON
QUICK-REFERENCE
Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing
designed to operate with Puron. Puron refrigerant cylinders are rose colored.
• Puron refrigerant
position.
cylinders manufactured
Cylinders
manufactured
GUIDE
equipment
and replacement
• Puron
cylinder
systems
• Manifold
service
should
March 1, 1999 and later DO NOT have a dip tube and MUST
sets should
pressure
be charged
be positioned
• Leak detectors
• Puron,
• Vacuum
rating must be 400 psig. DOT 4BA400
with liquid refrigerant.
upside down
should
pressure
be designed
will not remove
• Only use factory-specified
moisture
filter driers with rated working
rapidly.
Do not expose
and service
• A Puron liquid-line
filter drier is required
• Do not use an R-22
TXV.
• Never
to atmosphere
must be opened
• Do not vent Puron
• Observe
pressures
valves
materials.
with wet cloth when brazing.
on every unit.
while it is under
a vacuum.
for service, break vacuum
with dry nitrogen
into the atmosphere.
all warnings,
cautions,
• Do not leave Puron suction
no less than 600 psig.
oil to atmosphere.
to certain plastics and roofing
• Wrap all filter driers
• When system
with POE oils.
from oil.
filter drier in liquid line.
• POE oils may cause damage
open system
device in the manifold
rating.
moisture
liquid-line
• Do not install a suction-line
• POE oils absorb
metering
to detect HFC refrigerant.
as with other HFCs, is only compatible
pumps
or DOT BW400.
Use a commercial-type
be 750 psig high side and 200 psig low side with 520 psig low side retard.
• Use hoses with 750 psig service
are
prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright
to flow.
• Recovery
components
and bold text.
line driers in place for more than 72 hrs.
34
and replace
filter driers.
hose.
to allow liquid
Table
9-
Troubleshooting
Chart-Heat
SYMPTOM
Pump
Operation
CAUSE
REMEDY
Power failure
Fuse blown or circuit breaker tripped
Defective contactor, transformer,
or high-pressure,
loss-of-charge
switch
Compressor and outdoor fan
will not start
Compressor
runs
will not start but outdoor fan
HP/AC control board,
or low-pressure
Compressor
operates continuously
Determine
Incorrect or faulty wiring
Check wiring diagram and rewire correctly
User Interface setting too low/too high
Reset UI setting
Units
DO NOT bypass this compressor time
delay-wait for 5 minutes until time-delay
relay is de-energized
have
a 5-minute
time
delay
head
pressure
Check wiring and repair or replace
Compressor
Determine
motor burned out, seized, or
cause
internal overload open
Defective run capacitor, overload, or PTC (positive
temperature coefficient) thermistor
Replace compressor
Determine
cause and replace
Low input voltage (20 percent low)
Determine
cause and correct
Refrigerant
Recover refrigerant,
charge to capacities
overcharge
or undercharge
evacuate system, and reshown on rating plate
Insufficient line voltage
Blocked outdoor coil
Replace and determine cause
Determine cause and correct
Determine cause and correct
Defective run/start capacitor, overload or start relay
Determine
cause and replace
Faulty outdoor fan motor or capacitor
Damaged reversing valve
Replace
Determine
cause and correct
Restriction in refrigerant system
Locate restriction and remove
Dirty air filter
Unit undersized for load
Replace filter
Decrease load or increase
UI temperature
Low refrigerant
Reset UI setting
Locate leak, repair, and recharge
set too low/too high
charge
unit size
©utdoor coil dirty or restricted
Recover refrigerant, evacuate system, and recharge
Clean coil or remove restriction
Dirty air filter
Dirty indoor or outdoor coil
Replace filter
Clean coil
Refrigerant
Recover excess refrigerant
overcharged
Air in system
(Heat) Indoor air restricted or recirculating
Indoor or outdoor air restricted or air short-cycling
Continued
cause and correct
Faulty wiring or circuit
Loose connections in compressor
Air in system
Excessive
Replace component
Insufficient line voltage
Defective compressor
Compressor cycles (other than normally satisfying) cooling/heating
calls
Call power company
Replace fuse or reset circuit breaker
next page.
35
Recover refrigerant, evacuate system, and recharge
Determine cause and correct
Determine cause and correct
Table
10--Troubleshooting
SYMPTOM
Head pressure too low
Excessive suction pressure
Suction pressure too low
Chart-Heat
Pump
Operation
CAUSE
REMEDY
Low refrigerant charge
Restriction in liquid tube
(Cool) High Heat load
Check for leaks, repair and recharge
Remove restriction
Check for source and eliminate
Reversing valve hung up or leaking internally
Replace valve
Refrigerant overcharged
(Cool) Dirty air filter
Recover excess refrigerant
Replace filter
Low refrigerant charge
Metering device or low side restricted
Check for leaks, repair and recharge
Remove source of restriction
(Cool) Insufficient coil airflow
Increase air quantity
Check filter-replace if necessary
(Cool) Temperature
too low in conditioned
area
(Cool) Outdoor ambient below 55°F (13°C)
Filter drier restricted
Blower wheel not secured to shaft
IFM does not run
IFM operation
IVM-Indoor
Insufficient voltage at motor
Power connectors not properly sealed
is intermittent
Reset UI setting
Verify low-ambient
cooling enabled in UI
Replace
Properly tighten blower wheel to shaft
Determine cause and correct
Connectors
should snap easily; do not force
Water dripping into motor
Verify proper drip loops in connector
Connectors
Gently pull wires individually to be sure they are
crimped into the housing
not firmly sealed
wires
Van Motor
Table
10--Troubleshooting
SYMPTOM
Chart-Gas
Furnace
CAUSE
heating
REMEDY
Drain. Install drip leg.
No power to unit
Check power supply fuses, wiring or circuit
breaker.
No 24-v power supply to control circuit
Check transformer.
NOTE: Some transformers have internal overcurrent protection that requires a cool-down period to reset.
Mis-wired
Check all wiring and wire nut connections
or loose connections
Misaligned spark electrodes
Check flame ignition and sense electrode
tioning.
Adjust as necessary.
No gas at main burners
1. Check gas line for air. Purge as necessary.
NOTE: After purging gas line of air, wait at least 5
minutes for any gas to dissipate before attempting to light unit.
2. Check gas valve.
Inducer pressure switch not closing
1. Check pressure switch wires, connections,
and tubing. Repair or replace if necessary.
Dirty air filter
Clean or replace filter as necessary
Gas input to unit too low
Check gas pressure at manifold match with that
on unit nameplate
Unit undersized for application
Restricted airflow
Replace with proper unit or add additional
posi-
unit
Clean or replace filter. Remove any restriction.
Check rotation of blower, temperature rise of unit.
Adjust as necessary.
Limit switch cycles main burners
Poor flame characteristics
Operation
Water in gas line
Burners will not ignite
Inadequate
(Cont'd)
Incomplete combustion results in: Aldehyde odors,
carbon monoxide, sooting flame, floating flame
36
1. Tighten all screws around burner compartment
2. Cracked heat exchanger. Replace.
3. Unit over-fired. Reduce input (change orifices
or adjust gas line or manifold pressure).
4. Check burner alignment.
5. Inspect heat exchanger for blockage. Clean
as necessary.
START=UP CHECKLIST
(Remove and Store in Job File)
I. Preliminary information
MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:
II. PRE-START-UP (insert checkmark in box as each item is completed)
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
CHECK GAS PiPiNG FOR LEAKS (WHERE APPLICABLE)
CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE
VERIFY THAT UNIT INSTALLATION IS LEVEL
CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS
MAKE SURE THAT - (If Applicable) ON 060 SIZE PURON HEATPUMP ONLY, THE TWO WIRE TIES FASTEN
TO THE OUTDOOR COILS AND REVERSING VALVE/ACCUMULATOR HAVE BEEN REMOVED
lii. START-UP
ELECTRICAL
SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR (EVAPORATOR) FAN AMPS
TEMPERATURES
OUTDOOR (CONDENSER) AiR TEMPERATURE
RETURN-AIR TEMPERATURE
DB
COOLING SUPPLY AiR
DB
GAS HEAT SUPPLY AiR
DB
WB
WB
PRESSURES
GAS INLET PRESSURE
IN.WG
GAS MANIFOLD PRESSURE
IN.WG
REFRIGERANT SUCTION
PSIG SUCTION LINE TEMP*
REFRIGERANT DISCHARGE
PSIG DISCHARGE TEMPI,
( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
GAS HEAT TEMPERATURE RISE
TEMPERATURE RISE (See Literature) RANGE
MEASURED TEMPERATURE RISE
( ) VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PROPERLY
( ) VERIFY THAT OUTDOOR AIR THERMISTOR (OAT) iS PROPERLY INSTALLED & CONNECTED
*Measured at suction inlet to compressor
1-Measured at liquid line leaving condenser.
37
Copyright
2008 Carrier Corp. •
Manufacturer
reserves
7310 W. Morris St. •
the right to change,
Indianapolis,
IN 46231
at any time, specification8
and design8
Printed in U.S.A.
without
Edition
notice and without
38
Date:
08/08
obligations,
Catalog No:48XT-03SI
Replaces:
48XT-
02Sl
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.2 Linearized : No Page Count : 38 Page Layout : SinglePage Page Mode : UseNone Producer : Goby Monitor Application version 4, 0, 0, 13 Create Date : Wed Dec 03 04:16:10 2008 Author : Title : Subject :EXIF Metadata provided by EXIF.tools