CARRIER Package Units(both Units Combined) Manual L0605138
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
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£n
Installation
NOTE: Read
installation.
the entire
instruction
manual
before
NOTE: Installer: Make sure the Owner's
Manual
Instructions
are left with the unit after installation.
starting
TABLE
and
the
OF CONTENTS
Page
2
2
2-16
.................................
2
Identify Unit ...................................
Inspect Shipment ................................
Provide Unit Support
..............................
Roof Curb .....................................
Slab Mount ....................................
Ground Mount
.................................
2
2
2
2
2
2
Provide
Clearances
................................
2
Rig and Place Unit ................................
Inspection
.....................................
Introduction
....................................
7
7
7
Use of Rigging Bracket ...........................
Select and Install Duc_vork
..........................
7
9
Converting
Horizontal
Discharge
A05307
Units to Downflow
(Vertical) Discharge Units .........................
Provide for Condensate Disposal
.....................
Install Electrical Connections
.......................
High- Voltage Connections
9
9
11
.......................
11
Routing Power Leads Into Unit ....................
Connecting
Ground Lead to Ground Screw
Routing Control Wires ..........................
Accessory Installation
...........................
Special Procedures
for 208-v Operation
PRE-START-UP
..................................
START-UP
.......................................
..........
.............
Unit Start-Up
................................
Sequence of Operation
............................
Checking and Adjusting Refrigerant
Refrigerant
Charge
.............................
Charge
..........
No Charge ....................................
Low Charge Cooling ............................
To Use Cooling Charging (;harts ...................
Indoor Airflow and Airflow Adjustments
Defrost Control ..................................
Quiet Shift ....................................
Defrost
......................................
Heat/Cool
Mode
........................
............
.....
Fig. 1 - Unit 50CR
MAINTENANCE
...............................
Air Filter .......................................
Indoor
16
16
17
17
Electrical Controls and Wiring
......................
Refrigerant
Circuit ................................
Indoor Airflow
..................................
20
20
20
22
22
22
22
22
22
22
22
22
22
Outdoor
Outdoor
Blower
and Motor
24-28
25
11
11
11
17-23
20
Check for Refrigerant Leaks ........................
Start-Up Adjustments
.............................
Checking Cooling and Heating Control Operation
Emergency
Instructions
Service
SAFETY CONSIDERATIONS
........................
INTRODUCTION
..................................
RECEIVING
AND INSTALLATION
................
Check Equipment
to the Expertg
..........................
25
(;oil, Indoor Coil, and Condensate
Fan ....................................
Metering Devices-TXV
& AccuRater
Pressure Switches
................................
Loss-of-Charge
Switch
Drain Pan
Piston
....
26
26
26
..........
26
26
...........................
27
High-Pressure
Switch .............................
Copeland Scroll Compressor
(Puron (_:Refrigerant)
27
27
.......
Refrigerant
System ...............................
Refrigerant
...................................
Compressor
Oil ................................
27
27
27
Servicing Systems on Roofs with Synthetic
Liquid-Line
Filter Drier .........................
Puron (R-410A)
System Information
Refrigerant Charging
...............................
Loss-of-Charge
Switch
.........................
Check Defrost Thermostat
........................
TROUBLESHOOTING
.............................
START-UP
CHECKLIST
...........................
25
25
Materials
..............
...
27
28
28
28
28
28
28
28
SAFETY
CONSIDERATIONS
Installation
and
servicing
ofthisequipment
canbehazardous
dueto
mechanical
andelectrical
components.
Onlytrained
andqualified
personnel
should
install,
repair,
orservice
thisequipment.
Untrained
personnel
canperform
basic
maintenance
functions
such
ascleaning
andreplacing
airfilters.
All other
operations
must
be
performed
bytrained
service
personnel.
When
working
onthis
equipment,
observe
precautions
intheliterature,
ontags,
andon
labels
attached
to or shipped
withtheunitandothersafety
precautions
thatmayapply.
Follow
allsafety
codes.
Installation
mustbeincompliance
with
localandnational
building
codes.
Wear
safety
glasses,
protective
clothing,
andworkgloves.
Have
fireextinguisher
available.
Read
these
instructions
thoroughly
andfollowallwarnings
orcautions
included
inliterature
andattached
totheunit.
Recognize
safety
information.
Thisisthesafety-alert
symbol
Z_X
When you see this symbol on the unit and in instructions
be alert to the potential
for personal
or manuals.
injury.
injury or death. WARNING
signifies
hazards which
could result in personal injury or death. CAUTION
is used to
identify unsafe practices which may result in minor personal injury
or product
and property
damage. NOTE is used to highlight
suggestions
operation.
which will result in enhanced
Step 1--Check
IDENTIFY
installation,
reliability,
or
AND INSTALLATION
Equipnmnt
UNIT
The unit model number and serial number are printed on the unit
informative plate. Check this information
against shipping papers.
INSPECT
SHIPMENT
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
inspectors before removal. Folavard
claim papers directly to transportation
company.
Manufacturer
is
not responsible
for any damage incurred in transit. Check all items
against shipping list. Immediately
Conditioning
office if any item
notify the nearest Carrier Air
is missing. To prevent loss or
damage,
packages
leave all parts in original
Step 2--Provide
For hurricane
Certificate
ROOF
Understand
these signal words:
DANGER.
WARNING,
and
CAUTION.
These words are used with the safety-alert
symbol.
DANGER
identifies the most serious hazards which will result in
severe personal
RECEIVING
until installation.
Unit Support
tie downs,
(Professional
contact
distributor
Engineering)
for details
and PE
if required.
CURB
Install accessory
roof curb in accordance
with instructions
with curb (See Fig. 2). Install insulation, cant strips,
flashing. Ductwork must be attached to curb.
IMPORTANT:
The gasketing
applied
and
of the unit to the roof curb is critical
for a water tight seal. Install gasketing
roof curb. Improperly
shipped
roofing,
gasketing
material
supplied
with the
also can result in air leaks
and poor unit performance.
Curb should be level to within 1/4 in. (See Fig. 3). This is necessa U
for unit drain to function properly. Refer to accessory
roof curb
installation instructions for additional information
as required.
ELECTRICAL
SHOCK
SLAB
HAZARD
Failure to follow this warning
or death.
could result in personal
injury
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.
MOUNT
Place the unit on a solid, level concrete
in. thick with 2 in. above grade.
approximately
2 in. beyond
pad that is a minimum of 4
The slab should
extend
the casing on all 4 sides of the unit (See
Fig. 4). Do not secure the unit to the slab except when required
local codes.
GROUND
MOUNT
The unit may be installed
either on a slab or placed
directly
ground if local codes permit. Place the unit on level ground
with gravel for condensate
discharge.
EQUIPMENT
DAMAGE
Failure to follow
damage.
Step 3--Provide
HAZARD
this caution
may result
in unit component
Puron (R-410A)
systems operate at higher pressures than
standard
R-22
systems.
DO NOT
use R-22
service
equipment
or components
on Puron (R-410A)
equipnmnt.
Ensure service equipment is rated for Puron (R-410A).
by
on the
prepared
Clearances
The required minimum
Adequate
ventilation
service clearances are shown in Fig.6 and 7.
and outdoor
air must be provided.
The
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
corner or under an overhead obstruction.
The minimum clearance
under a partial overhang (such as a normal house overhang) is 48 in.
above the unit top. The maximum horizontal extension of a partial
overhang must not exceed 48 in.
IMPORTANT:
INTRODUCTION
Do not restrict outdoor
either the outdoor-air
The 50CR heat pump
outdoor
installation.
horizontal-discharge
ground-level
(vertical)
is fully self-contained
and designed for
Standard
units
are
shipped
in
a
configuration
for
installation
on
a
slab. Standard
discharge
units can be converted
configurations
for rooftop
to downflow
applications.
to compressor
airflow. An air restriction
inlet or the fan discharge
at
may be detrimental
life.
Do not place the unit where water, ice. or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on
carpeting
or other combustible
materials.
Slab-mounted
units
should be at least 4 in. above the highest expected water and runoff
levels. Do not use unit if it has been under water.
base_
/
/
/
/
[[[
.......
Screw _
@
(NOTE A)
_§
Fla slur,
I
:';allg_
"_
_
WOOd nailer*_
u0p, ______41K ilFdbRooz urb.
[
It:i:::tl _ Insulation(field
Roofing
/
II
m_,
\
II vs!:!tl II _
\
__Jtl
H
Roof
supphed)
II.
field supplied
Curb
for Small
Ductwork
field supplied]
Cabinet
Roof
Note A: When unit mounting screw is used,
retainer bracket must also be used.
Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
\/
/\
R/A
S/A
_Gasket
E
D
Insulated
deck pan
Sho_
Suppod
deck paq
around_
duct
Gasket around
outer edge \
Long
Suppod
'N\\
=.
Retlm opening
(BXC)
A05308
UNIT
ODS CATALOG
NUMBER
B
IN. (aM)
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
500R024-036
500R042-060
D
IN. (MM)
C
IN. (MM)
E
IN. (MM)
G
A
IN. (aM)
F
IN. (MM)
IN.(aM)
(1167)
(1167)
NOTES:
curb
must be set lip for unit
1.
Roof
2.
Seal
3.
Dimension
4.
Roof
curb
5.
Table
lists only
6.
Attach
ductwork
7.
Insulated
8.
Dimensions
9.
When
strip
unit
conditions.
nlust
be applied,
being
as required,
installed.
to unit
being
installed.
in ( ) are in millimeters.
is made
pmlels:
of 16
gauge
the dimensions,
to curb
steel.
per part
(flmlges
I in. thick
nmnber,
of duct
fiberglass
that have
changed.
rest on curb).
1 lb. density.
are in inches.
mounting
This
screw
bracket
is used (see
is available
Note
throt_gh
A). a retainer
bracket
must
This
bracket
Mierometl.
Fig. 2 - Roof
Curb
Dimensions
must
also be used
when
required
by
code
for hurricane
or seismic
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B
B-C
A-C
1/4
1/4
1/4
C99065
Fig. 3 - Unit Leveling
Tolerances
I
EVAR COIL
COND. COIL
C99096
Fig. 4 - Slab Mounting
Detail
1
2
Y
Z
3
X
A06114
Fig. 5 - Corner
CORNER WEIGHTS
Unit
Total Weight
Corner Weight 1
Corner Weight 2
Corner Weight 3
Corner Weight 4
Weights
(SMALL CABINET)
(Lbs.)
CORNER WEIGHTS (LARGE CABINET)
036
Unit
373
Total Weight
Corner Weight 1
024
349
030
349
70
54
70
54
58
84
141
84
141
90
Corner Weight 2
Corner Weight 3
150
Corner Weight 4
75
"uO
oo
042
438
048
463
O6O
499
88
68
98
61
1O7
7O
106
177
127
177
136
186
ELECTRICAL
C_ARACTERiSTiCS
UNil
i
§480
[33R]
t
5OSROR4
208
024
050
406 5
16001
I 60
5OCBORO
ROS/RRO 1 60,
2081230
R 60
5BCR038
208/230
ZOS/230
R 60
DONNER WEGT
A
B
SUPPLY
230
UNiT WT
70/3
70 3
7
l
60
5
84138
54/D4
5
84/38
NEIGBT
i
CENTER OF GRAVIIY
MNIIN
349
1158
3
9911i3902)
I
§OBO[£OO]
4S9B[193i
1
447
349
373
ilRS 3
i169R
991113902i
%419i4/02]
i
i
5OBO[ROO]
508 01200]
4S90[195i
R556[140i
i
i
4470[i_6]
RR02{iSO]
O[iT6]
REQUIRED CLEARANCES TO DOMBU$_BLE MAlL
LBS /_G
C
54/24
UNIT
s
' 14!/64
il4
/64
MiiLiMETPRS
[iNi
3566
[i4OO}
50 8 iROOi
3566
[_4OO}
12 7 (050]
9i44
[3600}
lOP O_ UNIT ......................
DUCT SIDE O? U_iT .............
S_SE OPPOSITE SUCTS ........................
BOTTOM OF UNIT .....................
ELECiRIC HEAl PANEL ......................
0
0
NED. REQ_RED CLEARANCES.
056
513
2_iRB/26
3
MiLLiMETDRS [i_]
10668
[4200_
9140
[3800i
BETWEEN UNTIE, POWER ENIRY SiBE
..............
UNIT AND UNGROSNSDD SURPACBS, POWER ENTRY SIDE .....
UNII AND BLOCK OR CONCNDTE WALLS AND OTHER
GROUNSES SURFACES, POWER ENTRY SIDE .............
REQUIRED CLEARANCE FOR OF'_ATION
10668
MiLLiMETERS [i_i
9140
[3600]
9i40
[3600}
EVAP DOll
ASCBSS SiDE .......................
PO_ER ENIRY SISE
.......
(EXCEPT FOR NED RDOUIREMENTS)
UNIt
TOP
..........
S;SE OPPOSITE SUETS ......................
DUCT PANDL
t
[4E00i
AND SERVICING
9!40
[3600}
9140
[3600}
304 8 [i2
00]=
=_INiMU_ D[SIA_CESziP
U_iT _S PLACEO LESS INAN 304 8 [12 00i PROM WALL
SYSTDM,TNE_
STETS# PERFORMANCE MAYSE COMPROMISES
TOP VIEW
BI_4ENSIONS iN []
ARE IN INSBES
11938
_T98
6
63144]
I
FUL
OUViR
e
22 R [0 88] BIA
HOLE
CONTROL ENTRf_
7
5703
[2245
ST62
[10
i
t87]
ll7 7
-
!
[iEB5i
8310
[B2 72i
LEFT SIDE VIEW
i
!
:t
I
42 T
87/
{3 43}
3266
!
IR4T
issoi
1_ 681
BRAN
EI
/96[0
75] N P T
X R2 060 8T
D P
i•
"SUPeL_
BUCT
j
OPENING j,
i
i
4020
[IV 8Si
2
l-
"''"'_--"
\
£O_PRESSOR SLOWER, ELECTRIC
& ELECTRICAL ACCESS PANEL
RDAT
L_:LID`
50
[0201
4 I_L'"/
898
_
[3 63]
L
8496
[9 83]
_
650
6
[21
67]
i
_
649 6
[9¸83)
[4 S11
1226 3
148 28]
RIGHT SIDE VIEW
FRONT VIEW
REAR VIEW
AO5299
Fig.6 - 50CR024-036
Unit Dimensions
_-
i
355 8
114 01]
i
208 230 ] 60, 808/230 3 60
208 230 _ 60, E08/230 3 60
50CR0_8
50CRO_O
RETURN
I
CORNER _E GiT
88/39
A
_Jg£T
J_
WT
ELECIRICAL
CHARACTER_S_ICS
UNIT
50CR042
9i68/30 8
_i1
208230160,
208/230 3 60
UNII HEGHI
'2 I'k ,i,, ,.° ,, ,,,
OF GRAVITY
MMIiN
ol,o,o,,o
ol., o.,,,
REQUIRED CLEARANCES TO COMBUSTIBLE NATL
LBS /1(6
8 ] 106/40
C
ii_77/80O
2
TOP OF _NI/
DUCT SIO[ Or 8_iT
................
SiDE OPPOSIT[
DUCTS........................
_01TOM OF _NiT ................................
ELEC/RIC _EAT PANEL
127157
_ 177/80
]
I_EC. REQ_RfD
611277
CENER
M/LL/M[iERS
[IN)
355 _ i_4 00!
5O 8 12 00}
355_
1i4001
127
1050}
9_
4 136 00/
EI.EARANEEE.
_EY_EEN 8N/iS.
PO_ER EN/RY SiSE
UNIT ANO UNGROUNDEDSURFACES< ?O_ER ENTRY S_E
UNiT _0
BLOC_ OR CONCRETE _LLS
AND OTHER
GRBUNDE_ $_RFACES
POWfR ENTRY SiDE .............
REQUIRED CL_RANCE
....
_iNI_UM
TOP VIEW
/066
8
14_00}
FUR OPI_RATItll AND S[!tVI_NG
_ILtI_ETERS
[iNI
914¸0
13600i
914 0 _36 00/
EVAP COIL ACCESS S/bE .........................
POW[R ENTRY SIOE
(EXCEPT £OR NEC REOUIREMENTS)
UNiT TOP ....................................
SiDE OPPOSITE _UCTS
.............
DUC/ PANEL
t
MILLIMETERS IiNi
1066 8 _42 00_
014 0 130 00/
914¸0
914¸0
30_8
136001
13600}
lie
00/1
01STANCES:IF
UNIT IS PLACED LESS TH_N 304_
[1200]
_RO_ _ALL
SYSTE_.IHEN
SESTEM PERFORMANCE MAYBE COM?RO_ISED
OIMENSiONS iN
I0907
142 941
[1AR£
iN {NCRES
[4700]
FIELD ENTRY_
SERVICE PORTS
\
44 3
\
\
FULl¸lOUVER
i
[I 74i
I
1193
t
•
F_LL LO_VE_
A
•
rgLi
LOUVER
L_m__
•
445
[I 75] OIA
_o--a
PO_ER ENIRY
070 2
i8442]
4070
I_EBU}
31
I)_CT
_---87
COMPRESSOR, _LOWER, ELECTRIC BEAT
& EIESTRICAL ACCESS PANE{
12263
1_8281
......................
FRONTVIEW
RIGHTSIDE VIEW
3"
!_-347
5
[13 68]
_
{13831
_,4
,
E
[343]
_35_2
................................
LEFT SIDE VIEW
_
\
_35/2
{13
REAR VIEW
A05300
Fig. 7 - 50CR042-060
Unit l)imensions
837
Step 4--Rig
and Place
Rigging
and handling
reasons
etc.).
clue to the installation
Only
of this equipment
can be hazardous
location
(roofs,
for many
elevated
Field Installation
BRACKET
of Ri_in_
Bracket
structures,
1. If applicable, remove unit from shipping carton. Leave top
shipping skid on the unit for use as a spreader bar to prevent
trained,
should
USE OF RIGGING
Unit
qualified
handle
crane operators
and ground
support
staff
the rigging straps from damaging the unit. If the skid is not
available, use a spreader bar of sufficient length to protect the
unit from damage.
and install this equipment.
When working with this equipment,
observe precautions
in the
literature, on tags, stickers, and labels attached to the equipment, and
any other safety precautions
2. Remove
4 screws in unit corner posts.
that might apply.
3. Attach each of the 4 nmtal rigging
Training for operators of the lifting equipment
not be limited to. the following:
should
include,
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
3. Condition
all applicable
temperature,
safety
codes.
brackets
rain lip (See Fig. 8). Use the screws removed
to secure the brackets to the unit.
under
the panel
in step 2 above
of the
or precaution.
of the load as it relates to operation
kit, such as balance,
Follow
gloves.
but
of the lifting
etc.
Wear safety
shoes
and work
PROPERTY
HAZARD
Failure to follow
this warning
injury/death
or property damage.
Rigging
adequate
INSPECTION
DAMAGE
bracket
lifting.
MUST
could
be under
the
result
rain
in personal
lip to provide
Prior to initial use, and at monthly intervals, all rigging brackets and
straps should be visually inspected
for any damage, evidence of
wear. structural deformation,
or cracks. Particular 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.
PROPERTY
Failure
DAMAGE
to follow
injury/death
HAZARD
this warning
or property
could
result
in personal
damage.
Do not strip screws when re-securing
the unit. If a screw is
stripped, replace the stripped one with a larger diameter screw
ELECTRICAL
SHOCK
(included).
HAZARD
Failure to follow this warning
or death.
could result in personal
injury
of Unit
1. Bend top of brackets
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
Ri_,_in_/Liftin_
switch with a suitable
warning
label.
the corner
2. Attach
opposite
down approximately
30 degrees from
posts.
straps of equal length to the rigging brackets
at
ends of the unit. Be sure straps are rated to hold the
weight of the unit (See Fig. 9).
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.
UNIT FALLING
HAZARD
Failure to follow this warning
or death.
Never stand beneath
rigged
could result in personal
injury
4. After unit is securely in place detach rigging straps. Remove
corner posts, screws, and rigging brackets then reinstall
screws.
units or lift over people.
INTRODUCTION
UNIT
The lifting/rigging
bracket is engineered
installed only on Small Packaged Products.
used to rig/lift a Small
elevated structures.
PROPERTY
DAMAGE
Packaged
Product
FALLING
and designed
to be
This bracket is to be
Failure
onto
injury/death
roofs
or other
to follow
HAZARD
this warning
or property
could
When straps are taut, the clevis should
inches above the unit top cover.
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.
in personal
be a minimum
of 36
After the unit is placed on the roof curb or mounting pad. remove
the top crating. On 50CR060 units only, 2 wire ties fastened to the
outdoor coils and reversing valve/accumulator
assembly must be
HAZARD
Failure to follow
this warning
injury/death or property damage.
result
damage.
a
cut. Remove
access wire
the left and front louvered panels and corner post to
ties. The wire tie to be cut on the left is located
approximately
4 in. down the tube sheet. The wire tie to be cut on
the right is located approximately
6 in. down the tube sheet.
n
DETAIL A
C03017
Fig. 8 - Rigging Bracket Under Unit Rain Lip
MINIMUM HEIGHT: 36
UNIT HEIGHT
SEE DETAIL
A06113
MAXIMUM
UNIT SIZE
SHIPPING
WEIGHT
Lb
Kg
500R024
372
169
500R030
372
169
500R036
395
179
500R042
462
210
500R048
485
22O
50CR060
521
236
Fig. 9 - Suggested
Rigging
Step5--Select
andInstallDuctwork
CONVERTING
The design and installation of the duct system must be in accordance
with the standards of the NFPA for installation
of non-residence
type
air conditioning
residence
and
ventilating
systems,
type. NFPA 90B and/or local codes
Select and size ductwork,
supply-air
registers,
NFPA
90A
HORIZONTAL
DOWNFLOW
(VERTICAL)
DISCHARGE
DISCHARGE
UNITS
TO
UNITS
or
and ordinances.
and return air grilles
ELECTRICAL
SHOCK
HAZARD
according
to
ASHRAE
(American
Society
of
Heating,
Refrigeration.
and Air Conditioning
Engineers) recommendations.
Failure to follow this warning
or death.
The unit has duct flanges on the supplythe side of the unit.
Before installing or servicing system, always turn off main
power to system.
There may be more than one disconnect
and return - air openings
on
switch.Turn
ELECTRICAL
OPERATION
Failure to follow this warning
or death.
off accessory
could result in personal
injury
NOTE: These panels
electrical knockout.
3. Use a screwdriver
bottom
4. Ensure
Step 6--Provide
ductwork,
consider
Recommended
2. Avoid
abrupt
change
sizes for filters are shown
duct size increases
in duct size adversely
IMPORTANT:
Use flexible
unit to prevent
transmission
NOTE:
the following:
1. All units should have field-supplied
filters or accessory
rack
installed
in the return-air
side
of the
filter
unit.
in Table 1.
and reductions.
Abrupt
affects air performance.
connectors
between
of vibration.
ductwork
Use suitable
and install lockout tag before
and
gaskets
to
ensure weather tight and airtight seal. When electric heat is installed,
Ensure
are held in place
and hammer
of the composite
to remove
are in place
to an
the panels
in the
to block
off the
Disposal
that condensate-water
The units dispose of condensate
tabs similar
(See Fig. 11).
for Condensate
with local codes, restrictions,
with
return and supply
unit base.
the side duct covers
air openings
injury
switch if applicable.
2. Remove side duct covers to access bottom
knockouts.
horizontal
and installing
heater power
1. Open all electrical disconnects
starting any service work.
HAZARD
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.
When designing
could result in personal
disposal
methods
comply
and practices.
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
permitted)
or onto a gravel apron in ground level installations.
Install a field-supplied
condensate
trap at end of condensate
connection to ensure proper drainage. Make sure that the outlet of
the trap is at least 1 in. lower than the drain-pan
condensate
connection to prevent the pan from overflowing.
Prime the trap with
use fireproof canvas (or similar heat resistant material) connector
between ductwork and unit discharge connection.
If flexible duct is
used. insert a sheet metal sleeve inside duct. Heat resistant duct
water. When using a gravel apron, make sure it slopes away from the
unit.
connector (or sheet metal sleeve)
heater element.
the unit, install a field-supplied
2-in. trap at the condensate
connection to ensure proper drainage. Condensate
trap is available
3. Size ductwork
4. Seal, insulate,
insulate
through
Air
must extend
for max cooling
and weatherproof
24-in.
from electric
air quantity
(400 cfm/ton).
all external
ductwork.
Seal,
and cover with a vapor barrier all ductwork passing
conditioned
spaces. Follow latest Sheet Metal and
Conditioning
Contractors
National
Association
(SMACNA)
and Air Conditioning
Contractors Association
(ACCA)
minimum
installation
standards
for residential
heating and air conditioning
systems.
5. Secure all ducts to building
structure.
Flash, weatherproof,
and vibration-isolate
duct openings
in
according to good construction
practices.
wall
or
roof
If the installation
requires draining
the condensate
water away from
as an accessory or is field-supplied.
Make sure that the outlet of the
trap is at least 1 in. 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 end of the 2 -in. trap
(See Fig. 12). Do not undersize the tube. Pitch the drain trough
downward at a slope of at least i in. for every 10 ft. of horizontal run.
Be sure to check the drain trough for leaks. Prime
beginning
of the cooling season start-up.
the trap at the
n
Table
1--Physical
Data - Unit 50CR
UNIT SIZE
024
030
036
042
048
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb.)
Compressor
Refrigerant (R-410A) Quantity (lb.)
REFRIGERANT
METERING DEVICE
2
2-1/2
3
3-1/2
4
5
350
350
373
440
463
499
7.5
8
9.5
t0.8
11.5
14.0
Scroll
TXV
ORIFICE OD (in.)
OUTDOOR
060
0.035
(2)
0.035
(2)
0.038
(2)
0.038
0.088
(2)
(Left
0.046
0,042 (Left OD Coil)
0.052 (Right OD Coil)
OD Coil)
(Right
OD Coit)
COIL
2...21
2...21
2...21
2...21
2...21
2...21
Face Area (sq. ft,)
OUTDOOR FAN
12.3
12.3
13.6
15.4
17.2
19.4
Nominal Cfm
Diameter
27O0
27OO
280O
28O0
3300
3300
22
22
22
22
22
Rows...Fins/in,
Motor HP (RPM)
INDOOR COIL
I/8
(825)
3...15
Rows...Fins/in,
Face Area (sq. ft,)
INDOOR BLOWER
1/8
(825)
I/8
3...15
3.7
(825)
I/8
(825)
I/4
22
(1100)
I/4
(1100)
4...15
3...15
4...15
4...17
3.7
4.7
4.7
5.7
3.7
Nominal Airflow (Cfm)
Comfort
Variable
Efficiency
Max
Size (in,)
Motor HP (RPM)
HIGH-PRESSURE
SWITCH (psig)
Cutout
Reset (Auto)
LOSS-OF-CHARGE/LOW-PRESSURE
(Liquid
based
on Comfort
Roll
back
(see
User
Interface
instructions
for
more
information).
700
875
1050
1225
1400
800
1000
1200
1400
1600
2000
10xt0
10x10
tlx10
1tx10
1tx10
1tx10
1/2
t/2
3/4
3/4
3/4
650
-+ 15
420
-+25
1750
1
SWITCH
Line) (psig)
Cutout
20-+
5
45-+
10
Reset (Auto)
_Required
Return-Air Filters (in.)*
20x24x1
20x24x1
24x30x1
24x36x1
24x36x1
24x36x1
Throwaway
filter sizes shown are based on the larger of tile ARI Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ftiminute
for throwaway
type
or 450
ft/'mimee
for high
capacity
type.
Air filter
pressure
drop
for non
standard
filters
must
not exceed
0.og
in. wg.
USER
INTERFACE
TOP COVER
DISCONNECT
PER NEC*
_FROM
GASLINE
*NEC
- NATIONAL
ELECTRICAL
CODE
A06091
Fig. 10 - Typical
Installation
10
UNIT
COMPONENT
DAMAGE
Failure to follow this caution
being installed.
i. Make
all electrical
ANSI/NFPA
governing
connections
2. Use
connections
Electrical
only
copper
Covers
and/or
On
t
ROUTING
phase
Trap
SHOCK
POWER
HAZARD
Connect
could result in personal
wiring
injury
LEADS
GROUND
the ground
ROUTING
The unit
including
Interface
instruction
POWER
a
separate
electrical
service
with
for wire sizing
The field-supplied
disconnect
high-voltage
(See Table 2 for electrical
may be mounted
Instructions
connections.
Operation
provided
with
of unit on improper
may cause unit damage
the
accessory
a
data).
on the unit over the
line voltage
may be
Service
for electrical
constitutes
service
abuse
WIRES
on the low voltage
connections
to the User
guide.
transformer
supplies 24-v power for complete system
accessory electrical heater. A fuse is provided in the 24-v
(See Fig. 19); see the caution label on
is factory wired for 230-v operation.
If supply voltage is 208-v, rewire transformer primary
in Special Procedures for 208-v Operation section.
inlet hole (See Fig. 6 and 7).
If the unit has an electric heater, a second disconnect
required.
Consult
the Installation,
Start-Up,
and
screw in the
low-voltage
hole provided into unit (See Fig. 6 and 7). Connect user
interface leads to unit control power leads as shown in Fig. 14.
field-supplied,
waterproof disconnect 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
amps (ampacity)
SCREW
Form a drip-loop with the control leads before routing them into the
unit. Route the low voltage control leads through grommeted,
CONNECTIONS
have
TO GROUND
(UI), refer to the UI installation
circuit on the control board
the transformer. Transformer
must
LEAD
lead to the chassis using the ground
CONTROL
Protection Association
(latest edition) (in Canada, Canadian
Electrical Code CSA C22.1) and local electrical codes.
unit
INTO UNIT
splice box (See Fig. 14 and 17).
For detailed
The
``vires.
entry side panel. See Fig. 6 and 7 for location and size. For
single-phase
units, connect leads to the black and yellow ,,vires ; for
3 -phase units, connect the leads to the black, yellow, and blue wires.
The unit cabinet must have an uninterrupted,
unbroken
electrical ground to minimize the possibility of personal injury
if an electrical fault should occur. 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, ANSI/NFPA
American
National
Standards
Institute/National
Fire
HIGH-VOLTAGE
power to unit is within operating
conduit termination
at the duct panel must be watertight. Run the
high-voltage
leads through the power entry knockout on the power
Connections
Failure to follow this warning
or death.
between
and unit. DO
imbalance.
as high-voltage
CONNECTING
ELECTRICAL
switch
Use only copper wire between
disconnect
and unit. The high
voltage leads should be in a conduit until they enter the duct panel;
cg9013
Electrical
for connections
disconnect
WIRE.
5. Do not damage internal components when drilling through
any panel to mount electrical hard``vare, conduit, etc.
MIN,
Step 7--Instan
local
4. Insulate low-voltage
``vires for highest voltage contained
within conduit when lo``v-voltage control ``vires are in same
conduit
Fig, 12 - Condensate
with NEC
voltage range indicated on unit rating plate. On 3-phase
units, ensure phases are balanced within 2 percent. Consult
local power company for correction
of improper voltage
A05301
1" (25mm)
in accordance
diagram.
conductor
3. Be sure that high-voltage
Fig. 11 - 50CR with Duct Covers
to the unit
Code Part i and applicable
Refer to unit wiring
field-supplied
electrical
NOT USE ALUMINUM
Ducl
may result in damage
(latest edition) and local electrical codes
such
wiring.
In Canada.
all electrical
must be in accordance
with CSA standard
('22. i Canadian
codes.
HAZARD
and
that could affect warranty.
11
as described
Table
V-PH-HZ
UNIT
2--Electrlcal
Data--50CR
ELECTRIC
VO LTAG E
RANGE
SIZE
COMPRESSOR
MIN
MAX
RLA
LRA
t87
253
13.5
61 .O
OFM
IFM
FLA
FLA
NOMINAL
208/230-1-60
0.9
4.3
208/230-1-80
187
253
15.9
73.0
253
18.9
83.0
0.9
4.3
0.9
8.8
036
187
253
12.2
77.0
50/50
5,4/7,2
26.0/30.0
54.8/59.6
60/60
7.5/10,O
36.1/41.7
67,2/74.2
70/80
25.1/25.1
30/30
18.1/20.8
47.8/51.1
50/60
5.4/7.2
28.0/30.0
57,6/82.6
60/70
7.5/10.0
38.1/41.7
70.2/77.2
80/80
29.5/29.5
35/35
18.1/20,8
52,1/55.6
60/60
5.4/7.2
28.0/30.0
82,0/87.0
70/70
7.5/10.0
36.1/41.7
74.7/81.6
80/90
11.3/15.0
54.2/62.5
97.2/107.7
100/110
3,8/5
1.8
6.8
208/230-1-60
253
22.4
t05.0
0.9
6.8
042
30/30
38.7/38.7
45/45
7,5/1 O,O
20.8/24.1
49,7/53.7
50/60
11.3/15.0
31.3/36.1
82.7/88.8
70/70
35.7/35.7
253
15.4
88.0
0.9
8.8
45/45
187
253
21.3
109.0
1.6
8.8
048
58,3/81.7
70/70
5.4/7.2
28.0/30.0
88.2/73.2
80/80
7.5/10.0
36.1/4t
80.8/87.8
11.3/15.0
90/90
54.2J82.5
108,4/118.8
110/125
15.0/20.0
72.2/83.3
128.0/139.9
150/150
27.0/27.0
35/35
10.4/12,0
40,0/42.0
50/50
7,2/10.0
20.8/24.1
53.0/57.0
80/60
tl.3/15,0
31.3/36.1
66.0/72.1
70/80
15.0/20.0
41.6/48.0
78,9/86.9
80/90
35.0/35.0
45/45
187
253
14.7
91.0
1.6
8.8
187
253
26,9
145.0
1.5
9.t
060
57.6/61.1
70/70
5.4/7.2
28.0/30.0
87.5/72.5
80/80
7,5/10.0
36.1/41.7
80.2/87.1
90/90
11.3/15.0
54.2J82.5
102.7/118.2
110/125
15.0/20.0
72.2/83.3
125.3/139.2
150/150
28.8/26.8
35/35
187
253
17.6
123.0
1.5
9.1
12
-/-
3.8/5.0
10.4/12.0
89.8/41.8
50/50
7,5/10.0
20.8/24.1
52.8/56.8
80/60
tl.3/15.0
31.3/36.1
65.9/71.9
70/80
15.0/20.0
41.8/48.0
78.7/86.7
80/90
44.2/44.2
80/60
-/-
3,8/5,0
18.1/20.8
68.8/70.3
5.4/7.2
28.0/30.0
78.7/81.7
90/1 O0
80/90
89.4/96.3
100/110
7,5/10.0
38.1/41.7
tl.3/15.0
54.2J82.5
ttl.9/122.4
t25/125
15.0/20.0
72.2/83.3
184.5/148.4
150/150
34.8/34.6
40/40
-/-
208/230-3-80
-/18.1/20.8
-/-
208/230-1-60
-/-
.7
3,8/5,0
-/-
208/230-3-60
-/18.1/20,8
-/-
208/230-1-60
-/-
3.8/5.o
3.8/5.o
187
-/-
23.7/23.7
-/-
208/230-3-60
-/-
10.4/12,0
3,8/5,0
-/-
t87
-/-
MOCP
30/30
-/208/230-3-80
MCA
44.8/48.1
3.8/5
187
FLA
22,1/22.1
-/-
208/230-1-60
POWER
18.1/20.8
3.8/5
-/030
POINT
SUPPLY
kW*
-/-
024
SINGLE
HEAT
-/-
3,8/5,0
10.4/12,0
47.6/49.6
60/60
7,5/10.0
20.8/24.1
60.7/84.7
70/70
11.3/15.0
31.3/38.1
73.7/79.7
t 5, 0/20.0
41.6/48.0
86.6/94.6
80/80
90/1 O0
EXAMPLE: Supply voltage is 230-3-60.
A B C
AB = 228 v
FLA
-LRA
-MCA
-MOCP -RLA
--
Full Load Amps
Locked Rotor Amps
MinimumCircuitAmps
Maximum Overcurrent
Rated Load Amps
LEGEND
AC = 227 v
,, @US
Lw
Average Voltage = 228 + 231 + 227
3
BC = 231 v
= 68._6
g
Protection
= 229
NOTES:
Determine
maximum
(AB) 229- 228 =
(BC) 231 - 229 =
(AC) 229- 227 =
Maximum
deviation
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440, the overcurrent protective device for the
unt sha be Power Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit breakeE
2. Minimum wire size is based on 60 C copper wire. Ifother than
60 Cwire
is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance
percent
% Voltage
Imbalance
deviation
v
v
v
2 v.
from
average
voltage.
of voltage
imbalance
2
= 100 x -229
= 0.8%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
% Voltage imbalance
= 100 x max voltage deviation from average voltage
average voltage
.
Determine
1
2
2
is
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
Heater capacity (kW) based on heater voltage of 208v & 240v.
If power distibution voltage to unit varies from rated heater
voltage, heater kW will vary accordingly.
C03014
Fig. 13 - Electrical
User Interface
Infinity
Data Legend
Control
Board
:
Outdoor
Air Therrnisto[
(if used)
m
m
m
Humidifier
(Optional)
N
LEGEND
Field Control-Voltage
Wiring
A05302
Fig. 14 - Control
Voltage
Wiring
13
Connections
II
UN!T COMPO_£N_ ARRANGEMENT
............ LEGEND
IZ3
Fq
k_S
D
} > SW!TCH
SETTINGS
PR[SS_£ES_]gC_
_VS
_lXrSl_
WlVU
,o_s
co.,r_ss_, orr m_,
2 SEE_RIC_P_GESro_ USE_ I_TE_E
r_
G
_E_!ZED
SEO_CE
_
S_BSAS[S
_,r,os, _,
,e,,,_,e
,o,,_,
,, _r ,s cosr_
C_D _TUZ_
G
_E EN_RGJZ_
! 50CR500007
] 7.0
A05304
Fig. 15 - Wiring
SchematicsISOCR
14
Single
Phase
II
BkN --
COSTROL BOARD
_, ............LEGEND
)viDooii_41_COmPONEnT ARRANGEMENT
--*
FIEL_ pO_R _RING
_o_P
_O_ESSO__o_o_
_P
l_IO0 /AN _0 0
E_
w
G
G
E_ERGIZ_D _E E_ER_IZ_O
CLOSES
_AT
1
O_E_
150CR500005
]5.0
A05259
Fig. 16 - Wiring
Schematics-50CR
15
Three
Phase
GROUND
SCREW
(INSPLICE
BOX)
INSTALLATION
A. Accessory
Electric
GROUND
LEAD
ACCESSORY
SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
L1 ......
3-PHASE
CONNECTIONS
L3
factory-approved
-- _BLK--
NOTE:
L2
Heaters
Electric heaters may be installed in 50CR
with
electric
heater
package.
See
-
-
-
-- _BLU--
Units
factory-supplied
opening.
This
condensation.
_YEL--
B. Outdoor
NOTE: Use copper wire only.
LEGEND
NEC - National Electrical Code
- - Field Wiring
_,_
Splice Connections
electric
per instructions supplied
unit
rating
plate
for
heater kits.
installed
without
electric
heat
Air Thermistor
While
the installation
using the Infinity control
have
a
over heater
of exterior
(OAT)
A 2-screw terminal strip is provided for connection
temperature
thermistor. This strip is marked OAT.
NOTE:
should
sheet metal block-off
plate installed
reduces
air leakage
and formation
of an outdoor
of an outdoor
temperature
sensor
OAT terminals
is optional,
certain
board
C99057
Fig. 17 - Line Power
Infinity features (ComfortHeat,
Connections
control)
electric heat lockout,
auto humidity
will be lost.
OAT input is used to supply outdoor temperature
data for system
level functions and for temperature
display on User Interface.
Using two ,,vires of field-supplied
lead of thermistor
to one screw
remaining
screw terminal:
strongly recommended
thermistor to eliminate
thermostat wire cable, wire one
terminal
and the other lead to
there is no polarity
to be observed.
It is
that two ,,vires be used to connect the
noise interference
in temperature
reading. If
there are not two spare ,,vires available in cable, one wire may be
used to connect thermistor to OAT screw terminal 1 and the other
lead of the thermistor can be wired to 24-vac COM (C) wire. OAT
screw terminal 1 is terminal located closest to the ABCD system
communications
and is marked with a small number 1 next to the
terminal
strip.
NOTE: Mis-wiring
OAT inputs will not cause damage to either
Infinity control or thermistor. If the thermistor is wired incorrectly,
no
reading
correctly
C.
will
appear
for normal
Humidifier
The Infinity
at User
Interface.
Re-wire
thermistor
operation.
Connections
control
board
terminal
marked
HUM
is provided
for
low voltage (24-vac)
control of a humidifier.
No humidistat
is
required
as User Interface
monitors
indoor
humidity.
When
commanded
to operate humidifier, the unit control will energize the
HUM output to turn humidifier on and de-energize
HUM output
turn humidifier
off. Wire HUM and C terminals
directly
humidifier as shown in Fig. 14.
SPECIAL
Be sure unit disconnect
AO530S
Fig. 18 - Control
Plate
Disconnect
wiring
The low-voltage
circuit is fused by a board-mounted
automotive
Connect
200-v.
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 and metal control board mounting
eyelets. Check to be sure control
both factory-installed
screws.
board
is mounted
PROCEDURES
securely
using
16
FOR 208-V
to
to
OPERATION
switch is open.
the yellow primary
lead
from the transformer.
See unit
label. (See Fig. 15, 16 and 18)
the yellow primary
lead to the transformer
terminal
labeled
3. Make the following
SEO-2
a. Inspect for shipping
and handling
damages,
such
broken lines, loose parts, disconnected
wires, etc.
o
SEO-1
inspections:
b. Inspect for oil at all refrigerant
tubing
connections
as
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
m
}
refrigerant
Refrigerant
leak is detected,
Leaks section.
see following
Check
for
c. Inspect all field- and factory-wiring
connections.
sure that connections
are completed
and tight.
d. Ensure
wires do not touch
refrigerant
tubing
Be
or sharp
sheet metal edges.
e. Inspect
coil fins.
handling, carefully
:=
4. Verify the following
o
If damaged
during
shipping
straighten fins with a fin comb.
and
conditions:
a. Make sure that outdoor
fan blade is correctly
positioned
in fan orifice (See Fig. 24).
b. Make sure that condensate
drain pan and trap are filled
with water to ensure proper drainage.
c. Make sure that all tools
have been removed.
and miscellaneous
loose
parts
o
5. Compressors
A03169
Fig. 19 - Detail
of Printed
Circuit
or remove
Board
are internally
compressor
spring
holddown
mounted.
6. Each unit system has two Schrader-type
PRE-
START-
Schrader
high-side
discharge
UP
Do not loosen
bolts.
ports, one low-side
fitting located
on the suction line, and one
Schrader
fitting located
on the compressor
line. Be sure that caps on the ports are tight.
START-UP
FIRE,
EXPLOSION,
ELECTRICAL
SHOCK
Step 1--Unit
HAZARD
Failure to follow this warning could result in personal
or death and/or property damage.
injury
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
secured.
3. Do not
electrical
compressor
remove
sources
ternainal
cover
is in place
compressor
terminal
cover
are disconnected
and tagged.
4. Relieve and recover all refrigerant
from system
touching
or disturbing
anything
inside terminal
refrigerant leak is suspected
5. Never
attempt
to repair
proceed as follows:
a. Shut off electrical
all
under pressure.
wear protective
power
before
box if
The amber LED located at bottom center of control adjacent to
motor harness plug is Motor Status LED and it is labeled MOTOR.
System
goggles
tubing with
from unit.
and
system
tubing
at the end of this book
right
center
of control
to inspect and prepare the unit for initial start- up:
and
of short flashes indicates
first digit of code.
of long flashes
second
flashes
indicates
is 0.25 seconds.
last short flash
Start-Up
digit of code.
on. A long flash is i second on.
and first long flash
6. The LED will be off for 2.5 seconds
B. Control
all access panels.
on
2. The number
5. The time between
second.
Checklist
shipped
in upper
1. The number
4. The time between
proceed as follows
CAUTION.
located
3. A short flash is 0.25 seconds
Use the Start-Up
2. Read and follow instructions
LED
system communications
status. Status Codes will be displayed
the STATUS LED using the following
protocol:
unsweat remaining
tubing stubs when
Oil can ignite when exposed to torch
supplied
amber
adjacent to System Communications
connector
(A,B,C,D)
is the
System Status LED and it is labeled STATUS. The green LED
labeled COMM is also located adjacent to System Communications
connector,
below STATUS LED, and is used as an indicator of
to unit and install lockout
c. Cut component
connecting
cutter and remove component
1. Remove
at the system user interface
in text with basic troubleshooting
instructions.
Careful use of information
displayed will reduce the
need for extensive manual troubleshooting.
A second
tag.
b. Relieve and reclaim all refrigerant from
using both high- and low-pressure
ports.
d. Carefully
necessary.
flame.
LEDs built into Infinity " control board provide installer or service
person information
concerning
operation and/or fault condition of
the unit control and ECM motor. This information
is also available
around compressor
terminals.
soldered
connection
while
refrigerant system is under pressure.
6. Do not use torch to remove any component.
contains oil and refrigerant
7. To remove a component,
A. LED Description:
and
until
Start-Up
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 assuming a component
failure.
and
System
before
repeating
is 1
code.
Communications
Troubleshooting:
on all DANGER,
and INFORMATION
labels
WARNING,
attached
On power up, green COMM
to, or
system communications
with unit.
17
LED will be turned off until successful
are established
(this should
happen within
n
2. Recheck
10 seconds).
Once conmmnications
with User Interface
are
successful, COMM LED will be lit and held on. At the same time,
amber
STATUS
LED will be lit and held continuously
request for operating mode is received.
on any time unit is in idle mode.
The STATUS
on until a
are not
successful
proper time period
motor
faults
The unit control
D. Using
and status
The
high- and low-voltage
2. Checkfuseoncontrolboardtobe
LED does not light within
proper time period
Iffuse
in this product
WINDING
consists
of two parts:
STATUS
2. Remove
motor control
could result in personal
injury
3. Failing
section
module
and unpainted
any of these
LED will be turned
has failed internal
procedure
off.
control
start-up
motor
entire
and unplug
end should
ECM
motor
module
FAULT
tests and must be replaced.
OUTPUT
SENSED
"ON"
detects a 24-vac
WHEN
of a 24-vac
signal on either heater stage output
Status (;ode 37 will be displayed on
will turn off output and command
To find the fault:
1. Stop all system operations
winding
stage 24-vac
must
at User Interface
and check heater
outputs.
2. Disconnect
electric heater at power and check heater wiring
for faults. See Status (;ode 36 for more information.
exceed
be
The
CODE 44. MOTOR
MOTOR
communication
control
TEST
blower motor to supply an airflow determined to be safe for current
operation mode with electric heaters energized.
module:
to be sure it is functional.
section
BOARD
will correct.
and it is not supplying signal,
STATUS LED. Unit control
STATUS
tests,
4. Passing all of the tests, motor
replaced.
TURNS
motor
to provide
unit
operation
and
When the motor is commanded
to
CODE 45, CONTROL
If unit control
replaced.
MOTOR
to
Unit control is provided with circuitry to detect presence
signal on electric heater stage 1 and stage 2 outputs.
plug. Motor shaft should turn freely, resistance between any
two motor leads should be similar and resistance between
any motor lead
100,000 ohms.
connected
STATUS CODE 37, HEATER
NOT ENERGIZED:
HAZARD
to replace a motor
motor winding
is
highest priority Status (;ode to be flashed. All existing faults, as well
as a fault history, can be viewed at User Interface.
After disconnecting
power from the ECM motor, wait at least
5 minutes before removing
the control section. Internal
capacitors require time to discharge.
1. Check
blower
for
highest priority code will be displayed on STATUS LED. Clearing
the indicated fault when multiple faults exist will cause the next
SECTION
Failure to follow this warning
or death.
Before proceeding
the
wait
provided below. Codes are listed in order of their priority, highest
to lowest. Though multiple faults can exist at any time, only the
the
No other service
SHOCK
and
Unit faults indicated
by flashing codes on the amber system
STATUS LED can be resolved using troubleshooting
information
Unit control
ELECTRICAL
down
E. Unit Troubleshooting
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.
MOTOR
itself
Troubleshooting.
control module and the motor winding section. Do not assunre
motor or module is defective if it will not start. Use the designed-in
VERIFY
as
The unit
STATUS LED for the Status (;ode. Refer to the troubleshooting
instructions
for the indicated
Status Code in Section
E, Unit
C. ECM Motor Troubleshooting
used
motor
If the MOTOR LED is lit, flashing, and the motor does not run, or
if the MOTOR LED is off and the motor is running, check the
or shorting
of the ABCD
will
not
allow
successful
fuse to open.
motor
for airflow.
If the MOTOR LED is lit, flashing, and the motor is running, or if
the MOTOR
LED is off and the motor is stopped, operation
is
normal and no motor fault exists.
NOTE: Shorting or mis-wiring low-voltage
system wiring will not
cause damage to unit control or user interface but may cause low
The ECM
LED
stop, the MOTOR
and status
1. Check system wiring to be sure User Interface is powered
and connections
are made A to A, B to B, etc. and wiring is
voltage
a demand
operate, the MOTOR LED will be turned on and will flash each time
instructions are sent to the motor. When the motor is commanded
to
code is displayed,
not shorted.
Mis-wiring
communications
wiring
communications.
of blower
to run the blower
line and works with the unit control microprocessor
and
the STATUS
LED
troubleshooting
infornration.
is open, check system wiring before replacing it to be sure a
short does not cause a failure of replacement
fuse.
If COMM
maintains
a lockout
User
Motor LED in Troubleshooting
MOTOR
comnmnication
to be sure
sureitisnotblown.
will not cause
will attempt
25 seconds,
the motor will shut
communications
to be reestablished.
code is not displayed;
1. Check system transformer
the system is powered.
using
every five seconds, even when the motor is idle. If, during operation.
the unit control does not communicate
with the motor for more than
C, Y. O, W terminal strip connections
and will display Status (;ode
16, System Communication
Fault, on amber STATUS LED. No
further troubleshooting
information
will be available
at User
Interface until communications
are re-established.
LED does not light within
pressure
control will not operate electric heaters while a fault condition
exists. The unit control communicates
with the motor at least once
exceeding 2 minutes, the Infinity control will only allow emergency
heating or cooling operation using a common thermostat and the R,
If COMM
static
Blower
operation.
for a period
system
screens with access panel in place.
long as User Interface
If. at any time, communications
and
service
NOTE:
LED will be
airflow
Interface
alone can be
and STATUS
information.
SLOWLY
LED
is
COMMUNICATION
connected
to
the
FAULT
blower
motor
line and works with the unit control microprocessor
LED to provide
unit operation
and troubleshooting
When motor is commanded
to operate, the MOTOR LED will be
turned on and will flash each time instructions are sent to the motor.
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.
18
When
themotor
iscommanded
tostop,
theMOTOR
LED,,villbe
turnedoff. TheMOTORLEDwill not flashto indicate
communications
when
itisturned
off.
Unitcontrol
isconstantly
communicating
withthemotor,
even
whenthemotorandMOTOR
LEDareoff.If motordoes
not
acknowledge
receipt
ofcommunications,
thecontrol
willdisplay
Status
(;ode44 on STATUS
LEDandcontinue
to try to
communicate
with the motor.If motoracknowledges
communication,
status
code
willbecleared.
If MOTOR
LEDislitandflashing
andmotor
does
notrun:
1.Check
theSTATUS
LED.If STATUS
LEDisindicating
a
Status
44code,
check
themotor
wiringharness
forproper
connection
tocontrol
andmotor
receptacles.
2.Check
motor
wiringharness
tobesure
allwiringcomplies
withwiringdiagram
description,
makes
acomplete
circuit
fromconnector
toconnector,
andisnotshorted.
3.Check
12-vdc
lowvoltage
supply
tomotor
atpins1(+)and
2(-)ofmotor
header
connection
tounitcontrol.
Ifallchecks
arenormal,
unitcontrol
isgoodand
control
module
on
motormayneed
replacement.
Check
motorandMotorControl
Module
following
theinstructions
in Section
C,ECMMotor
Troubleshooting.
Shorted
ormis-wiring
ofthelowvoltage
motor
harness
wiring
will
notcause
damage
tounitcontrol
ortomotor
control
module.
If theMOTOR
LEDisoff.STATUS
LEDisindicating
aStatus
(;ode
44andmotor
isrunning:
1.Disconnect
themotor
harness
attheunitcontrol.
If motor
continues
torun.unitcontrol
isgood
and
control
module
on
motor
mayneed
replacement.
STATUS
CODE
25,INVALID
MOTOR
/ MODEL SELECTION
2. If symptoms
3. Check
NOTE:
is incorrect
(;ODE
26. INVALID
wiring of resistor
harness
at unit
value greater than
assembly.
is an approved
size for unit
Unit control will not operate electric heater until this Status
If the heater size is set through
the heater will be operated
desired,
as a single
the User Interface.
stage heater.
If staging
is
the IDR value must be read in by the unit control.
STATUS CODE 36. HEATER
ENERGIZED
OUTPUT
NOT SENSED
Unit control is provided with circuitry to detect presence
signal on electric heater stage 1 and stage 2 outputs.
WHEN
of a 24-vac
If unit control energizes either heater stage and does not detect the
24-vac signal on output, Status Code 36 will be displayed on the
STATUS
LED, unit control will continue
to energize heater
output(s)
energized
and adjust blower operation
electric heat stage(s).
to a safe airflow
level
for
Unit control
or
To find the fault:
1. Check for 24-vac on heater stage outputs.
sensing circuit may be bad.
NOTE:
It may be useful
procedure
Code
to disconnect
16 enabling
which
heater
operation.
electric
When
heater
troubleshooting
is energized
outputs
to force Status
heat mode. It is difficult
unit is operated
both
Terminal
as an electric
the system communications
of emergency
output
heaters,
together.
or not
energized
in emergency
are energized
strip inputs to control
to know
in normal
heat mode using
and de-engergized
can then be connected
W to turn on both electric heat outputs.
circuits can then be checked to resolve
R to
Heater output sensing
Status Code 36 or 37
problems.
on STATUS
STATUS
LED.
for model
size, motor
must
HEATER
CODE
If MOTOR
41, BLOWER
MOTOR
LED is lit and flashing
FAULT
and motor
does not run:
1. Check STATUS LED. If STATUS LED is indicating Status
Code 41, motor control has detected that the motor will not
come up to speed within
30 seconds of being commanded
to
run or that the motor has been slowed to below 250 rpm for
more than 10 seconds after coming up to speed. Motor
be
replaced with proper size motor. Unit control will not
respond to operation
requests until this fault condition
is
resolved.
STATUS
for proper
Code is resolved.
2. If model size data is missing (as is the case when a
replacement
control
board is installed),
system
User
Interface will prompt installer to enter correct model size
from a list of valid sizes.
size
wiring
for unit size or size data is invalid,
Status Code 25 will be displayed
3. If motor
disconnect
and check for a resistance
4. Make sure heater size installed
and size installed.
On initial start-up, unit control shall poll motor for its size data and
check unit size data stored in unit control memory.
1. If motor size is incorrect
persist,
control board
5000 ohms.
wiring
harness
and unit control
are operating
properly,
do
is not rubbing
the
not replace.
2. Check
SIZE
to be sure that the blower
wheel
housing.
On initial power-up,
unit control will write into memory electric
heater size as read from heater if heater is provided with Identifier
3. Check
4. Check
that this is correct will establish that the
an electric heater accessory.
Upon
section
following
instructions
in
the motor control
module
may need
replacement.
CODE
16. SYSTEM
COMMUNICATION
FAULT
Code 26 will be
If, at any time, system communications
period exceeding
2 minutes,
the unit
If heater installed is equipped with a resistor connected to pins i and
2 of heater harness connector and status code 26 is displayed on
STATUS LED:
connections
windings
C, ECM Motor Troubleshooting.
If all these checks are normal,
STATUS
1. Check wiring harness
secure.
motor
Section
choosing negative option, installer will be prompted to select heater
size installed from a list of valid heater sizes for unit size installed.
Status
shaft is not seized
properly).
connected to pins 1 and 2 of heater harness connector. If no resistor
is found, system User Interface will prompt installer to verify that no
If heater ID resistor value read is invalid,
displayed on STATUS LED.
to be sure that the motor
(motor control module must be renroved and electronics
disconnected
from
windings
to perform
this check
Resistor (IDR). Heater size must be valid for combination
of indoor
and outdoor components installed. Unit control will read IDR value
heater is installed. Verifying
unit is operating
without
motor
to be sure connections
emergency
thermostat,
are not successful
control will only
heating
or cooling
operation
using
a common
and the R, C, Y. O, W terminal strip connections
and,,vill
display Status code 16 on the amber STATUS
are
for a
allow
LED (see section
E,
Emergency
Heating
and Cooling
Modes).
No further
unit
troubleshooting
information
will be available at the User Interface
until communications
are re-established.
19
Check
system
wiringtobesure
theUser
Interface
ispowered
and
connections
aremade
AtoA,BtoB.etc.,
and
wiring
isnotshorted.
Mis-wiring
orshorting
oftheABCD
communications
wiring
will
notallow
successful
communications.
Correcting
wiring
faults
will
clear
thecode
andre-establish
communications.
Shorting
ormis-wiring
thelowvoltage
system
wiring
willnotcause
damage
tounitcontrol
ortoUser
Interface
butmaycause
thelow
voltage
fusetoopen.
STATUS
(;ODE
46,BROWNOUT
CONDITION
If thesecondary
voltage
ofthetransformer
fallsbelow
15-vac
for
aperiod
exceeding
4seconds,
Status
Code
46willbedisplayed
on
STATUS
LEDandtheUserInterface
willcommand
thecontrol
board
toturnoffYoutput
controlling
compressor.
Whensecondary
voltage
risesabove
17-vac
formorethan4
seconds,
thebrownout
condition
iscleared
andnormal
system
operation
will resume
subject
to anyminimum
compressor
off-delay
function
which
may
beineffect.
Brownout
does
notaffect
blower
orelectric
heater
operation.
STATUS
CODE
53,OUTDOOR
AIRTEMPERATURE
SENSOR
FAULT
IfanOATsensor
isfound
atpower-up,
input
isconstantly
checked
tobewithinavalidtemperature
range.
If sensor
isfound
tobeopen
orshorted
atanytimeafter
initialvalidation,
Status
(;ode
53willbe
displayed
atamber
STATUS
LED.
Check
forfaults
inwiringconnecting
sensor
toOATterminals.
Using
anOhmmeter,
check
resistance
ofthermistor
forashortor
open
condition.
If thermistor
isshorted
oropen,
replace
it toreturn
thesystem
to
normal
operation.
Iffaultisinthewiring
connections,
correcting
the
faultwillclear
thecode
andreturn
thesystem
tonormal
operation.
NOTE:
Iffaultcondition
isanopen
thermistor
orawiring
problem
thatappears
tobeanopen
thermistor
andthepower
totheunitis
cycled
off.thefaultcode
willbecleared
onthenextpower-up
but
thefaultwillremain
andsystem
operation
willnotbeasexpected.
Thisisbecause
on power-up,
the unit control cannot discern the
difference
between
Step 2--Sequence
NOTE:
Once
should
not be started
interface.
The
Interface
User
uses
humidity
pressure
other
the indoor blower
at requested
Install a bi-flow
opened
for repair.
be adjusted
and indoor
and outdoor temperature
the system operation
for
occupant
literature
comfort and system efficiency. Refer
for further system control details.
to User Interface
Airflow
during
be greater
electric
heater
operation
must
remaining
minimum level for safe operation. If User Interface instructs unit to
turn on electric heat and the requested
airflow is less than the
minimum level the unit control will override requested value.
delay built
ports to relieve
system
refrigerant.
accepted
practices.
the system has been
for leaks using an approved
method.
and reclaim
refrigerant
if no
Puron (R-410A)
refrigerant,
using a
cylinder or accurate scale. Refer to unit
rating plate for required
charge.
Adjustments
Complete
the required
procedures
given in the Pre-Start-Up
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in cooling mode
when
the outdoor
temperature
is below
40°F (unless
accessory.
low-ambient
kit is installed). Do not rapid cycle the compressor.
Allow 5 min. between "on" cycles to prevent compressor
damage.
CHECKING
COOLING
AND
HEATING
CONTROL
OPERATION
Start and check the unit for proper control
1. Place room UI SYSTEM
position.
Observe
operation
switch or MODE
that blower motor
is placed in FAN ON position
as follows:
control
in OFF
starts when FAN mode
and shuts down within
(030-060
size) or 30 sec (024 size) when
switch is placed in AUTO position.
FAN
60 sec
MODE
2. Place system switch or MODE control in HEAT position. Set
control above room temperature.
Observe that compressor.
outdoor fan, and indoor blower motors start. Observe that
heating
cycle shuts down when control
using
an automatic
changeover
setting is satisfied.
room
thermostat.
place both SYSTEM
or MODE control and FAN mode
switches in AUTO positions. Observe that unit operates in
cooling mode when temperature
control is set to "call for
cooling" (below room temperature),
and unit operates in
heating mode when temperature
control is set to "call for
heating"
(above
IMPORTANT:
oriented.
Unit
room temperature).
Three-phase,
must
be
scroll
checked
compressors
to ensure
proper
are
direction
compressor
3-phase power lead orientation. If not corrected within 5 minutes.
the internal protector will shut off the compressor.
The 3-phase
power leads to the unit must be reversed
than a
it
The
Leaks
refrigerant
system
leaks are found.
Step 4_Start-Up
compressor
filter drier whenever
5. Charge unit with
volumetric-charging
airflow for most modes.
from nominal using indoor
humidity
data to optimize
system
4. Evacuate
additional
data
The nominal requested airflow will be 350 cfm per ton of nominal
cooling capacity as defined by unit size. Actual airflow request will
elapsed.
mode.
and low-pressure
and reclaim
NOTE:
supplied from indoor and outdoor system components
to control
heating or cooling system for optimum comfort. The unit will be
commanded
by User Interface to supply airflow. The unit will
operate
have
leaks and charge the unit as follows:
2. Repair leak following
3. Check
heating
for Refrigerant
1. Use both high-
3. When
and
and then has stopped,
4 minutes
there is a 5-minute
Locate and repair refrigerant
in Step 1--Start-Up.
temperature,
until
for heat pump
Step 3--Check
an open sensor or ifa sensor is not installed.
described
Additionally,
into the control
The packaged
heat pump is designed
for installation
with a
communicating
User Interface.
This unit will not respond
to
commands provided by a common thermostat except under certain
situations
has started
again
cooling cycle remains "on" until the room temperature
drops to
point that is slightly below the cooling control setting of the user
of Operation
emergency
the compressor
turning backwards,
the difference
discharge
may be dramatically
2O
pressures
between
to correct rotation.
compressor
When
suction and
lower than normal.
OUTDOOR
INDOOR
COIL
TXV
COIL
in Meterin(
Position
LCS
BPS
Bypass
Position
LEGEND
HPS - High Pressure
Switch
LCS - Loss of Charge
Switch
Accurate#Metering
]
Arrow indicates
Device
direction
of flow
C03011
Fig. 20 - Typical
Heat Pump
OUTDOOR
Operation,
Cooling
Mode
INDOOR COIL
COIL
_,--
TXV in Bypass
Position
.4
LCS
HPS
Metering
Position
LEGEND
HPS - High Pressure Switch
LCS - Loss of Charge Switch
AccuratePMete_ing Device
]
Arrow indicates direction of flow
C03012
Fig. 21 - Typical
Heat
Pump
Operation,
21
Heating
Mode
CHECKING
AND ADJUSTING
REFRIGERANT
The refrigerant
system is fully charged with
refrigerant and is tested and factory sealed.
NOTE:
Adjustment
of the refrigerant
the unit is suspected
charging
CHARGE
Puron
R-410A
charge.
pressures
in cooling
attached
to the outside
suspect
in heating
informative
mode
mode,
plate amount.
the physical
only. A refrigerant
of the service
data
reclaim
indicated
When
adjustment
very minimal.
condition
insufficient
The
The
label is attached
is
level is
DEFROST
to
The defrost
from
mode
to the outside
of the
evaluating
the
to the specified
refrigerant
charge,
an
adjustment
is indicated,
an abnormal
such
to observe
as
on
defrost cycle. When the Quiet Shift switch is
cycle will be observed.
thermostat
is in open
position,
and speedup
pins are
On return to heating operation, compressor will again turn off for an
additional 30 sec and the outdoor fan for 40 sec. When the Quiet
COOLING
Shift is in OFF position,
Use Cooling Charging Chart (Fig. 22). Vary refrigerant until the
conditions
of the chart are met. Note that charging
charts are
used. Charts are based on charging the
for the various operating conditions.
gauge and temperature
sensing
the pressure gauge to the service
reading. Indoor air CFM must be within
of the unit.
1. Turn off power to outdoor
devices are
port on the
CHARGING
the nornral operating
2. Disconnect
board
a
few
temperature
and read the manifold
what
the
lead from
OF2 on control
grounding.
mode, allowing
frost to accumulate
on
range
4. After
to determine
the
unit.
fan motor
3. Restart unit in heating
outdoor coil.
(;HARTS
line temperature
outdoor
(See Fig. 23). Tape to prevent
thermostat
gauges.
Refer to the chart
temperature
should be.
only a brief 30 sec cycle will be observed.
If it is desirable to observe a complete defrost in warmer weather,
defrost thermostat must be closed as follows:
suction line. Mount the temperature
sensing device on the suction
line and insulate it so that the outdoor ambient does not affect the
Take the liquid
depending
selected Quiet Shift position). When Quiet Shift switch is in ON
position, the length of defrost is 1 minute (30 sec compressor
off
period followed by 30 sec of defrost with compressor
operation).
rating plate).
TO USE COOLING
are available
shorted (with a flat head screw driver) for 5 sec and released, a short
defrost cycle will be observed (actual length is dependent upon the
Check
for leak. Use standard
evacuating
techniques.
After
evacuating
system, weigh in the specified amount of refrigerant
pressure
Connect
a complete
defrost
If defrost
NO CHARGE
Accurate
required.
a
selected, compressor
will be turned off for two 30 sec intervals
during this complete defrost cycle, as explained previously. When
Quiet Shift switch is in factory default OFF position, a normal and
complete
different from type normally
units to correct subcooling
which includes
If defrost thermostat is closed, speedup pins (J1) must be shorted by
placing a flat head screw driver in between for 5 sec and releasing,
factory charge must always be
CHARGE
CHARGE
control
30 minutes).
The amount of refrigerant charge is listed on the unit rating plate
and/or the physical data table. Refer to the Refrigeration
Service
Techniques Manual. Refrigerants Section.
LOW
is a time/temperature
time period (DIP switch 1 and 2 on the board)
cycles of 30, 60, 90. or 120 minutes (factory set at
To initiate a forced defrost, two options
the status of the defrost thermostat.
If a substantial
(refer to system
control
field-selectable
between defrost
and the tables
in cooling
exists somewhere
in the cooling
system,
airflow across either coil or both coils.
REFRIGERANT
label
and charge
label
and pressures
de-energize,
compressor
will turn off for another 30 sec, and the
outdoor fan will stay off for 40 sec, before starting in the heating
mode.
and
may be obtained
charging
temperatures
only. A refrigerant charging
service access door.
IMPORTANT:
all refrigerant
(This information
table also.)
shown refer to system
charging
access door. If charge
is
off for 30 sec and then turn back on to complete defrost. At the start
of heating
after conclusion
of defrost
reversing
valve will
unless
label and the tables shown refer to system temperatures
and a defrost
initiated, the following sequence of operation will occur. Reversing
valve will energize, outdoor fan will turn off, compressor
will turn
(R-410A)
charge is not required
of not having the proper
When Quiet Shift switch is placed in ON position,
minutes
should
drop
(approximately
in
heating
below
mode,
closing
liquid-line
point
of defrost
30°F).
pressure
liquid
NOTE:
line
Unit will remain in defrost until defrost thermostat
at approximately
80°F coil temperature
reopens
at liquid line or remainder
of defrost cycle time.
NOTE:
If the
problem
causing
refrigerant
leak. refer to Check
INDOOR
AIRFLOW
inaccurate
for Refrigerant
AND AIRFLOW
NOTE: Be sure that all supplyfrom obstructions,
and adjusted
Unit 50CR
the
Step 5--Defrost
Leaks
is a
5. Turn off power to outdoor and reconnect
OF2 on control board after above forced
section.
ADJUSTMENTS
and return-air
properly.
utilizes state of the art ECM
Motor) ID Blower
detailed information
readings
NON-COMMUNICATING
HEATING MODE
grilles are open. free
(Electronic
Motors.
See user interface
on adjusting airflow.
This mode of operation
failed or is otherwise
Computated
instructions
established
for
fan motor lead to
defrost cycle.
EMERGENCY
COOLING
/
is provided only in the case where the UI has
unavailable.
If communications
cannot be
with the UI, the Infinity
following thermostat input terminals
control of the 50CR unit:
control
to allow
board
will enable the
simple thermostatic
Control
a. Y & O for cooling
QUIET
SHIFT
Quiet Shift is a field-selectable
occasional
defrost
noise that could be heard at the start of defrost
restarting of heating cycle. It is selected
defrost board) in ON position.
b. W for electric heat (if applicable)
mode, which will eliminate
by placing
c. Y for heat pump
cycle and
DIP switch 3 (on
The Infinity control
with the maxinmm
applicable)
22
heat
will respond to cooling and heating demands
safe airflow based on electric heat size (if
and unit capacity.
Required
Subcooling
oF (oC!
Outdoor Ambient
Required
Temperature
Lic_uid Line Temperature
Required SubcooEng
for a Specific
Subcooling
!°F)
(R-4tOA!
Required
Subcooling (°C)
Model Size
75 (24)
82 (25)
85 (29)
95 (35)
105 (4t)
Presstm
)ressurc
(peig)
5
10
15
20
25
3
6
8
11
14
tO,3 (5,7)
9,3(5.2)
9,8(5,4)
8,8(4,9)
9,4(5,2)
8,6(4,5)
9(5)
7,8(4,3)
8,6(4,7)
7(3,9)
t89
t96
St
63
56
58
51
46
41
1303
16
13
11
8
5
53
48
43
1351
17
15
12
9
8
16,5(9.8)
12.7 (7,t)
18.8 t 9.2 )
12,7(7,1)
t8.4 ( 8,8 )
t2,6(7)
14,3(7,9)
12.6(7)
203
210
88
68
81
63
56
51
46
1399
19
16
13
10
8
O42
t7,8 ( 9.8 )
t2,8 (7,1)
58
53
48
1448
20
17
14
11
9
O48
t7,5 ( 9.7 )
16.9(9,4)
16.6(9,2)
t5.7 ( 8,7 )
14,8(8.2)
217
70
65
60
55
50
1498
21
18
15
13
10
14.5(8.1)
11.5 ( 8.4 )
224
231
238
72
74
76
87
69
71
62
57
52
1544
22
19
18
14
11
64
59
54
1598
23
20
18
15
12
66
61
56
1641
24
21
19
18
13
245
77
72
67
62
57
1689
25
22
20
17
14
252
79
74
69
64
59
1737
26
23
21
18
15
260
268
81
83
78
78
71
66
St
1792
27
25
22
19
16
73
68
53
1848
29
26
23
20
17
276
85
80
75
70
85
1903
30
27
24
21
19
284
87
82
77
72
87
1958
31
28
25
22
20
292
89
84
79
74
89
2013
32
29
26
23
21
300
91
88
81
76
71
2088
33
30
27
24
22
5- Interpolate if the Outdoor ambient temperature lies in between the table
values, Extrapolate
if the temperature lies beyond the table range.
309
93
88
83
78
73
2130
34
31
28
28
23
318
95
90
85
80
75
2192
35
32
29
27
24
6- Find the Pressure Value in the table corresponding
Pressure of the Compressor
Discharge line.
327
97
92
87
82
77
2254
36
33
31
28
25
336
99
94
89
84
79
2318
37
34
32
29
26
345
101
98
91
86
81
2378
38
35
33
30
27
354
103
98
93
88
83
2440
39
36
34
31
28
364
105
100
95
90
85
2509
40
38
35
32
29
374
107
102
97
92
87
2578
41
39
36
33
30
384
108
103
98
93
88
2647
42
40
37
34
31
394
110
105
100
95
90
2718
44
41
38
35
32
404
112
107
102
97
92
2785
45
42
39
36
33
414
114
109
104
99
94
2854
46
43
40
37
34
424
116
111
106
101
96
2923
47
44
41
38
35
434
118
113
108
103
98
2992
48
45
42
39
36
444
119
114
109
104
99
3081
48
46
43
40
37
454
121
116
111
106
101
3130
49
47
44
41
38
464
123
118
113
108
103
3199
50
48
45
42
39
474
124
119
114
109
104
3268
51
48
46
48
40
484
126
121
118
111
106
3337
52
49
47
44
41
494
127
122
117
112
107
3408
53
50
47
45
42
504
129
124
119
114
109
3475
54
51
48
48
43
514
131
126
121
118
111
3544
55
52
49
48
44
524
132
127
122
117
112
3612
56
53
50
47
45
534
134
129
124
119
114
3681
56
54
51
48
45
O24
O30
O36
O60
13.7{7.8)
CharqincLProcedure
t- Measure
Discharge
t3 { 7.2 )
line pressure
by attaching
2- Measure the Liquid line temperature
device to it.
3- insulate the temperature
doesn't affect the reading.
sensing
4- Refer to the required Subcooling
the Outdoor Ambient temperature.
13(7.2)
by attaching
a temperature
device so that the Outdoor
port.
sensing
Ambient
in the table based on the model size and
7- Read across from the Pressure reading
temperature
for a required SubcooEng
8- Add Charge if the measured
a gauge to the service
to the the measured
to obtain the Liquid line
temperature
is higher
than the table value,
(kPa)
H
C03027
Fig. 22 - Cooling
Table
3--ECM
Charging
Wet Coil Pressm_
UNIT
STANDARD
SIZE
600
700
800
9OO
1000
024
0.005
0.007
0.010
0.012
0.015
0.007
0.010
0.012
0.015
0.018
0021
0024
0.019
0.023
0.027
0032
0.014
0.017
0020
0027
030
036
042
1100
1200
048
Table-Subcooling
CFM
1300
Drop
1400
1500
0037
0042
0.047
0024
0027
0032
0036
060
Table
FILTER SIZE
20X20X1
500
0.05
600
0.07
700
0.08
24X30X1
800
0.1
4--Filter
Pressure
1600
1700
1800
0.031
0.035
0.039
0.043
0.041
0.045
0.052
0.029
0.032
0.036
Drop Table
CFM
900
0.12
1000
0.13
1100
0.14
1200
0.15
1300
1400
0.05
0.6
0.07
0.07
0.08
0.09
0.1
0.06
0.07
0.07
0.08
24X36X1
Table
5--Electrlc
Small
(in. wg)
(SCFM)
1900
2000
0.057
0.053
0.058
0.040
0.045
0.049
2100
0.053
(in. wg)
1500
1600
1700
1800
1900
2000
2100
2200
2300
0.09
0.09
0.10
0.11
0.12
0.13
0.14
0.14
Heat Pressure
Drop Table
Cabinet:
024=036
GFM
5 kw
500
0.00
600
0.00
700
0.00
800
0.00
900
0.00
1000
0.00
1100
0.00
1200
0.00
1300
0.02
1400
0.04
1500
0.08
1600
0.07
7.2 kw
10 kw
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.02
0.02
0.04
0.03
0.06
0.05
0.07
0.07
0.09
0.08
0.10
0.09
0.11
15 kw
0.00
0.00
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
20 kw
0.00
0.00
0.02
0.04
0.06
0.08
0.09
0.11
0.13
0.15
0.17
0.19
23
Table
6--Electric
Heat Pressm'e
Large
Cabinet:
Drop Table
042-060
GFM
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
21 O0
2200
2300
2400
2500
5kw
7.2 kw
0.00
0.00
0.00
0.00
0.00
0.01
0.01
0.02
0.02
0.03
0.03
0.04
0.04
0.05
0.05
0.06
0.06
0.07
0.07
0.08
0.08
0.09
0.09
0.10
0.10
0.11
0.11
0.12
0.12
0.13
10 kw
0.00
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
15 kw
0.00
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
20 kw
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
o
---
o
m
r,o
_
-<_
--<:>--
_
O
-C:>-
o
--C:)_
-<=>-
-C:D--
O
-CZ3-
<_
CESO1
Quiet
Shift
Speedup
Pins
30076-00
Defrost interval
DIP switches
Fig. 23 - Defrost Control
MAINTENANCE
To ensure
possibility
continuing
high performance,
and to nainimize the
of premature equipment
failure, periodic maintenance
ELECTRICAL
must be performed on this equipment. This heat pump unit should
be inspected at least once each year by a qualified service person. To
troubleshoot
unit. refer to Table 8, Troubleshooting
NOTE TO EQUIPMENT
OWNER:
about the availability
of a maintenance
Consult
contract.
caution
3. Never place anything
with the unit.
INJURY
AND UNIT DAMAGE
could
result in serious injury
1. Turn off electrical power to the unit before
maintenance
or service on this unit.
local dealer
2. Use extreme
PERSONAL
HAZARD
Failure to follow these warnings
or death:
(;hart.
your
SHOCK
when removing
combustible
perfornring
panels
any
and parts.
either on or in contact
HAZARD
Failure to follow this warning could result in personal
or death and possible unit component damage.
injury
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.
UNIT
24
OPERATION
HAZARD
Failure to follow this caution may result in equipment
or improper operation.
damage
Errors made when reconnecting
wires may cause
and
dangerous
operation.
Label
all wires
disconnecting
when servicing.
improper
prior
to
Theminimum
maintenance
requirements
forthisequipment
areas
follows:
1.Inspect
airfilter(s)
eachmonth.
Clean
or replace
when
necessary.
2.Inspect
indoor
coil,drainpan.andcondensate
draineach
cooling
season
forcleanliness.
(;lean
when
necessary.
3.Inspect
blower
motor
and
wheel
forcleanliness
each
cooling
season.
(;lean
when
necessary.
4.Check
electrical
connections
fortightness
andcontrols
for
properoperation
eachcoolingseason.
Service
when
necessary.
StepI--Air Filter
IMPORTANT:
Never operate the unit without
in the return- air duct system. Always
a suitable
Step 4_Outdoor
UNIT
installed.
1. Remove
cover.
the filter becomes
Step 2--Indoor
Blower
NOTE: All motors
these motors.
clogged
expose
1 for
6 screws holding
accumulated
dirt and grease
from
the blower
efficiency,
wheel
grille and motor
upside
down
to top
on top cover
for cracks
to
or bends.
loosen setscrew
5. When replacing
position
fan blade,
and slide fan off
blade so that the hub is
1/8 in. away from the motor end (1/8 in. of motor
be visible) (See Fig. 24).
6. Ensure that set screw engages
when tightening.
Do not attempt to lubricate
and continuing
outdoor
assembly
3. Inspect the fan blades
and Motor
economy,
to unit
fan blade.
7. Replace
For longer life, operating
may result in damage
4. If fan needs to be removed,
motor shaft.
with dust and lint.
are pre-lubricated.
this caution
2. Turn motor/grille
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
HAZARD
Keep the condenser fan free from all obstructions
to ensure
proper cooling operation. Never place articles on top of the
unit.
air filter
See Table
OPERATION
Failure to follow
components.
replace the filter with the same
dinmnsional
size and type as originally
recommended
filter sizes.
Fan
shaft will
the flat area on the motor shaft
grille.
clean
and motor
annually.
ELECTRICAL
SHOCK
HAZARD
Failure to follow this warning
or death.
could result in personal
injury
Infinity Top
A06035
Disconnect
and tag electrical power to the unit before cleaning
and lubricating the blower motor and wheel.
"A"
UNIT SIZE
DIMENSION
Infinity
Step 3--Outdoor
Drain Pan
(?oil, Indoor
Coil, and Condensate
Inspect the condenser coil. evaporator
pan at least once each year.
coil, and condensate
The coils are easily cleaned when dry; therefore,
drain
inspect and clean
024
25
030
25
036
24
042
24
048
24
060
19
Fig. 24 - Fan Blade
the coils either before or after each cooling season. Remove all
obstructions,
including 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
Step 5--Electrical
Inspect
cleaner, using the soft brush attachnmnt. Be careful not to bend the
insulation,
wiring,
connections.
disassemble
and wiring
annually.
Be
to the unit.
If any smoky or burned connections
the connection,
clean all the parts, re-strip
and reassemble
the connection
properly
are noticed,
the wire end
and securely.
After inspecting
the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
Inspect the drain pan and condensate drain line when inspecting the
coils. (;lean the drain pan and condensate
drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
air filter(s). If the drain trough is restricted,
snake" or similar probe device.
controls
power
Remove access panel to locate all the electrical controls and wiring.
Check all electrical connections
for tightness. Tighten all screw
or air
filter(s). For best results, spray condenser
coil fins from inside to
outside the unit. On units with an outer and inner condenser coil, be
sure to clean between the coils. Be sure to flush all dirt and debris
from the unit base.
clear water. Do not splash water on the insulation,
and Wiring
and check the electrical
sure to turn off the electrical
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 not to splash water on motors,
Controls
Clearance
cycle to ensure proper operation.
operating cycle, or if a suspected
motor, wiring, or
each
electrical
instrumentation.
checks.
clear it with a "plumbers
25
If discrepancies
are observed in
malfunction
has occurred, check
component
with
Refer to the unit wiring
the
proper
electrical
label when making these
Balance
Point
Worksheet
7O
60
CD
o
C::t.
o° o
g,m
50
Bg-
4o
O60
048
042
036
"-
30
030
:5
E
5
=
CO
r-
024
20
10
-2O
-10
0
10
20
Outdoor
Air
30
Temp
40
(Deg
50
6O
F)
C03008
Fig. 25 - 50CR Balance
Step 6--Refi*igerant
Point Worksheet
Circuit
Inspect all refrigerant tubing connections
and the unit base for oil
accunmlation
annually.
Detecting
oil generally
indicates
a
refrigerant
leak.
If oil is detected or if low performance
is suspected, leak test all
refrigerant tubing using an electronic leak detector, or liquid-soap
solution.
If a refrigerant
Refrigerant Leaks section.
If no refrigerant
leak
is detected,
refer
to Check
leaks are found and low performance
refer to Checking
Step 7--Indoor
and Adjusting
Refrigerant
for
is suspected,
Charge section.
Airflow
The heating and/or cooling airflow does not require checking unless
improper performance
is suspected. If a problem exists, be sure that
all supplyobstructions,
and return-air
grilles
are
and that the air filter is clean.
Step 8--Metering
Devices-TXV
open
& Accurater
and
free
from
Piston
This unit uses 2 types of nmtering devices. The outdoor metering
device is a fixed orifice and is contained in the brass- hex body in the
liquid line feeding the outdoor
a TXV-type
device.
Step 9--Pressure
Switches
Pressure
are protective
switches
coils. The indoor metering
devices
wired
into control
device is
C99097
circuit
Fig. 26 - Refrigerant
(low voltage). They shut off compressor
if abnormally
high or low
pressures are present in the refrigeration
circuit. These pressure
switches
systems.
are specifically
R-22 pressure
for the Puron
(R-410A)
designed to operate with Puron (R-410A)
switches must not be used as replacements
Step 10--Loss-of-Charge
Circuit
Switch
This switch is located on the liquid line and protects against
suction pressures caused by such events as loss of charge,
system.
26
low
low
airflow
across
indoor
coil,dirtyfilters,
etc.It opens
onapressure
drop
atabout
20psig.
Ifsystem
pressure
isabove
this,switch
should
beclosed.
Tocheck
switch:
1.Turnoffallpower
tounit.
2.Disconnect
leads
onswitch.
3.Applyohmmeter
leads
across
switch.
Youshould
have
continuity
onagood
switch.
NOTE:
Because
these
switches
areattached
torefrigeration
system
underpressure,
it is notadvisable
to remove
thisdevice
for
troubleshooting
unless
youarereasonably
certain
thataproblem
exists.
If switch
must
beremoved,
remove
andrecover
allsystem
charge
sothatpressure
gauges
read0 psi.Never
opensystem
without
breaking
vacuum
withdrynitrogen.
Stepll--High-Pressure
Switch
REFRIGERANT
PERSONAL
COMPRESSOR
2. Disconnect
fan
SERVICING
MATERIALS
Exposure,
Scroll
OIL
SYSTEMS
ON
ROOFS
WITH
SYNTHETIC
POE (polyolester)
compressor
lubricants are known
term damage to some synthetic roofing materials.
to unit.
3. Apply ohm meter leads across
continuity on a good switch.
Compressor
switch.
You should
(Puron
have
even
if
inmmdiately
cleaned
up,
to cause long
may
cause
embrittlement
(leading to cracking) to occur in one year or more.
When performing any service that may risk exposure of compressor
Refrigerant)
The compressor used in this product is specifically
designed
operate
with Puron
(R-410A)
refrigerant
and cannot
injury,
oils designed for HCFC and CFC refrigerants.
Take all necessary
precautions
to avoid exposure of the oil to the atmosphere.
leads on switch.
Step 12--Copeland
HAZARD
The compressor
in this system uses a polyolester
(POE) oil, Mobil
3MA POE. This oil is extremely hygroscopic,
meaning it absorbs
water readily. POE oils can absorb 15 times as much water as other
To check switch:
1. Turn off all power
OPERATION
hoses, and recovery system must be designed to handle Puron.
If you are unsure, consult the equipment manufacturer.
psig.
coil, failed
UNIT
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. (_auge set,
The high-pressure
switch is located in the discharge
line and
protects against excessive condenser coil pressure. It opens at 650
High pressure may be caused by a dirty outdoor
motor, or outdoor air recirculation.
INJURY,
Failure to follow this caution may result in personal
equipment damage or improper operation.
oil to the roof. take appropriate
precautions
to protect roofing.
Procedures
which risk oil leakage include, but are not limited to,
compressor
replacement,
repairing refrigerant leaks, and replacing
to
be
refrigerant
components
such as filter drier,
metering device, coil. accunmlator,
or reversing
interchanged.
The compressor
is an electrical (as well as mechanical)
device.
Exercise extreme caution when working near compressors.
Power
should be shut off, if possible, for most troubleshooting
techniques.
Refrigerants present additional safety hazards.
Synthetic
Roof
1. (;over
Precautionary
extended
polyethylene
approximate
roof
pressure
valve.
switch.
Procedure
working
(plastic)
drip
10 X 10 ft area.
area with
cloth
or
an impermeable
tarp.
(;over
an
2. (;over area in front of the unit service panel with a terry cloth
shop towel to absorb lubricant spills and prevent run-offs,
EXPLOSION,
FIRE,
ELECTRICAL
SHOCK
Failure to follow this warning could result in personal
or death and/or property damage.
Wear safety glasses and gloves when
Keep torches
and
other
ignition
refrigerants
and oils.
handling
sources
and
HAZARD
protect
drop
cloth
from
tears
caused
by
tools
or
components.
injury
3. Place terry cloth shop towel inside unit imnmdiately
component(s)
to be serviced and prevent lubricant
through the louvered openings in the unit base.
refrigerants.
away from
4. Perform
required
service.
5. Remove and dispose
local codes.
The scroll compressor
pumps refrigerant throughout
the system by
the interaction
of a stationary and an orbiting scroll. The scroll
LIQUID-LINE
FILTER
under
run-offs
of any oil-contaminated
material
per
DRIER
compressor
has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and
The biflow filter drier is specifically
flooded starts. The compressor
is equipped with an anti-rotational
device and an internal pressure-relief
port. The anti-rotational
Use only factory-authorized
components.
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
device prevents the scroll from turning backwards and replaces the
need for a cycle protector. The pressure-relief
port is a safety device,
designed to protect against extreme high pressure. The relief port
has an operating
range
between
550
and
625
system.
psi differential
PURON
scroll compressor
uses Mobil
is the only oil allowed
for oil recharge.
Step 13--Refrigerant
System
to operate with Puron.
system. Do not unsweat a filter drier from the system. Heat from
unsweating will release moisture and contaminants
from drier into
pressure.
The Copeland
designed
3MA POE oil. This
(R-410A)
REFRIGERANT
Refer to unit information
CHARGING
plate and charging
chart. Some
R-410A
refrigerant
cylinders
contain
a dip tube to allow liquid
refrigerant
to flow from cylinder
in upright
position.
For
cylinders equipped
with a clip tube. charge Pnron (_: units with
This step covers the refrigerant system of the 50CR, including the
compressor
oil needed, servicing
systems on roofs containing
synthetic materials, the filter drier, and refrigerant charging.
cylinder in upright position and a commercial nmtering
manifold hose. Charge refrigerant into suction line.
27
device
in
Step 14--System
Information
LOSS-OF-CHARGE
Unit Top
SWITCH
The loss of charge switch is a protective device wired into control
circuit (low voltage). It shuts off the compressor if abnormally
low
pressures are present in the refrigeration circuit.
Defrost
Sensor_
NOTE: Because these switches
under
pressure,
it is not
are attached
advisable
troubleshooting
unless
exists. If switch
must be removed,
charge
so that pressure
without
breaking
CHECK
to remove
you are reasonably
gauges
vacuum
DEFROST
to refrigeration
this
system
device
for
certain that a problem
remove
and recover
read 0 psi. Never
all system
open
system
with dry nitrogen.
THERMOSTAT
There is a liquid header with a brass distributor
and feeder tube
going into outdoor coil. At the end of one of the feeder tubes, there
is a 3/8-in. OD stub tube approximately
3 in. long (See Fig. 27). The
defrost thermostat should be located on stub tube.
NOTE: There is only one stub tube used with liquid header, and on
most units it is the bottom circuit.
The defrost
thermostat
signals heat pump
that conditions
Detail A
are right
for defrost or that conditions
have changed to terminate defrost. It
is a thermally-actuated
switch clamped to outdoor coil to sense its
temperature.
Normal
open at 80 ° -+ 5°E
temperature
range is closed
at 30 ° -+ 3°F and
TROUBLESHOOTING
Refer to the Cooling and Heating
for troubleshooting
information.
START-UP
Use the Start-Up
Checklist
Troubleshooting
(;hart (Table 7)
CHECKLIST
at the back of this manual.
A06068
Fig. 27 - Defrost
28
Sensor
Location
HEAT
REFRIGERATION
PUMP
WITH
SECTION
PURON
QUICK-REFERENCE
GUIDE
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
cylinders
manufactured
prior to March
upright
Cylinders
manufactured
March 1, 1999 and later DO NOT
position.
equipnaent
and replacement
components
1. 1999, have a dip tube that allows liquid to flow out of cylinder
have a dip tube and MUST be positioned
to allow liquid to flow.
•
Recovery
•
Puron systems
cylinder
service
•
Manifold
•
Use hoses with 750 psig service
•
Leak detectors
•
Puron,
•
Vacuum
•
Only use factory-specified
•
Do not install a suction-line
•
POE oils absorb
•
POE oils may cause damage
•
Wrap all filter driers and service
•
A Puron
•
Do not use an R-22
•
Never
open system to atmosphere
•
When
system
•
Do not vent Puron
•
Observe
•
Do not leave Puron
should
pressure
be charged
sets should
rating must be 400 psig. DOT 4BA400
with liquid refrigerant.
should
pressure
be designed
will not remove
moisture
liquid-line
metering
device in the manifold
be 750 psig high side and 200 psig low side with 520 psig low side retard.
rating.
to detect HFC refrigerant.
as with other HFCs. is only compatible
pumps
or DOT BW400.
Use a commercial-type
moisture
liquid-line
with POE oils.
from oil.
filter driers with rated working
filter drier in liquid
rapidly.
pressures
no less than 600 psig.
line.
Do not expose
oil to atmosphere.
to certain plastics and roofing
materials.
valves with ,,vet cloth when brazing.
filter drier is required
on every unit.
TXV.
must be opened
while it is under
for service,
a vacuum.
break vacuum
with dry nitrogen
into the atmosphere.
all warnings_
cautions_
suction
and bold text.
line driers in place for more than 72 hrs.
29
and replace filter driers.
hose.
are
in
upside down
Table
7
Troubleshooting
SYMPTOM
Compressor
and outdoor
will not start
II
Compressor
rune
will
not
start
CAUSE
fan
but
Chart
condenser
fan
REMEDY
Power failure
Call power company
Fuse blown or circuit breaker tripped
Replace fuse or reset circuit breaker
Defective contactor, transformer, control relay, defrost
board, or high-pressure,
lossof-charge or low-pressure switch
Replace component
Insufficient line voltage
Determine
Incorrect or faulty wiring
Check wiring diagram and rewire correctly
User Interface setting too low/too high
Reset UI setting
Units have a 5-minute
DO NOT bypass this compressor time
delay wait for 5 minutes until time-delay
relay is de-energized
time delay
Faulty wiring or circuit
Loose connections in compressor
Check wiring and repair or replace
Compressor
Determine
motor burned out, seized, or
internal overload open
Defective run capacitor, overload, or PTC (positive
temperature coefficient) thermistor
One leg of 3-phase
power dead
Low input voltage (20 percent low)
Three-phase
scroll
compressor
(size 030-
060 unit) has a low pressure differential
Scroll compressor
is rotating in the wrong direction
Refrigerant overcharge
Compressor
cycles (other than normally satisfying) cooling/heating
sails
or undercharge
head
pressure
Replace fuse or reset circuit breaker
Determine cause
Determine
cause and correct
Correct the direction
3-phase
of rotation by reversing the
power leads to the unit
Recover refrigerant,
charge to capacities
evacuate system, and reshown on rating plate
Damaged reversing valve
Restriction in refrigerant system
Determine cause and replace
Replace
Determine cause and correct
Locate restriction and remove
Dirty air filter
Unit undersized
Replace filter
Decrease load or increase unit size
Determine
for load
set too low/too high
Frosted coil with incorrect defrost operation
cause and correct
Reset UI setting
Locate leak, repair, and recharge
Check defrost time settings
Reset as necessary
Check defrost temperature switch
Replace as necessary
Outdoor 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 overcharged
Recover excess refrigerant
Air in system
(Heat) Indoor air restricted or recirculating
Indoor or outdoor air restricted or air short-cycling
(Continued
cause and replace
Defective run/start capacitor, overload or start relay
Faulty outdoor fan motor or capacitor
Air in system
Excessive
Determine
Replace and determine cause
Determine cause and correct
Low refrigerant charge
operates continuously
cause
Replace compressor
Defective compressor
Insufficient line voltage
Blocked outdoor coil
UI temperature
Compressor
cause and correct
next page)
3O
Recover refrigerant, evacuate system, and recharge
Determine cause and correct
Determine cause and correct
Table
SYMPTOM
Head pressure too low
Excessive suction pressure
7
Troubleshooting
('hart
(Cont'd)
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
Move timer on control board to 30 minutes between
defrost cycles
(Heat) Outdoor coil frosted
Low refrigerant charge
Suction pressure
too low
(Cool) Insufficient
Increase air quantity
Check filte_replace
if necessary
coil airflow
(Cool) Temperature too low in conditioned
(Cool) Outdoor ambient below 55°F
Filter drier restricted
Compressor
IFM
does
runs
not
but
outdoor
run
fan
does
not
Insufficient
voltage at motor
not properly sealed
Water dripping into motor
operation
IFM
Indoor
area
NO (normally closed) contacts on defrost board
open
Blower wheel not secured to shaft
Power connectors
iFM
Check for leaks, repair and recharge
Remove source of restriction
Metering device or low side restricted
kit
Replace
Check condition of relay on board
Replace if necessary
Properly tighten blower wheel to shaft
Determine cause and correct
Connectors
should snap easily; do not force
Verify proper drip loops in connector wires
Gently pull wires individually to be sure they are
crimped into the housing
is intermittent
Connectors
Reset UI setting
Install low-ambient
not firmly sealed
Fan Motor
31
START=UP CHECKLIST
(Remove
and Store in Job File)
I. Preliminary information
MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:
IL 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
H
ill. START-UP
ELECTRICAL
SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR (EVAPORATOR) FAN AMPS
TEMPERATURES
DB
OUTDOOR (CONDENSER) AIR TEMPERATURE
RETURN-AIR TEMPERATURE
DB
WB
COOLING SUPPLY AIR
DB
WB
HEAT PUMP SUPPLY AIR
ELECTRIC HEAT SUPPLY AIR
PRESSURES
REFRIGERANT SUCTION
PSIG SUCTION LINE TEMP*
REFRIGERANT DISCHARGE
PSIG DISCHARGE TEMPt
( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
*Measured at suction inlet to compressor
tMeasured at liquid line leaving condenser.
A05306
Copyright
2006 Carrier Corp
Manufacturer
reserves
• 7310 W Morris
St • Indianapolis,
iN 46231
the right to change_ at any time_ specifications
and designs
Printed in U.SA.
without
notice
Edition
and without
.32
Date: 03/06
obligations,
Catalog
Replaces:
No: 50CR-1SI
New
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