CARRIER Package Units(both Units Combined) Manual L0604537
48GS L0604537
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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48GS, 48GX
3-Phase Single-Packaged Gas Heating/
Electric Cooling Units
HEATING & COOLING
Visit www.carrier.com
Installation, Start-Up, and Operating Instructions
48GS Sizes 030-060, 48GX Sizes 030-060
NOTE: Read
installation.
the entire
instruction
TABLE
SAFETY
RECEIVING
before
starting
.....................................................
..........................................................................
AND
INSTALLATION
..........................................
CHECK EQUIPMENT .............................................................
IDENTIFY
UNIT ................................................................
INSPECT
the
OF CONTENTS
CONSIDERATIONS
INTRODUCTION
manual
SHIPMENT
1
2
2
2
2
........................................................
2
INSTALLATION
................................................................
PROVIDE uNrr SUPPORT ....................................................
2
2
ROOF CURB .......................................................................
SLAB MOUNT ...................................................................
GROUND MOUNT ............................................................
FIELD FABRICATE
PROVIDE
RIG AND
DUCTWORK
........................................
CLEARANCES
......................................................
PLACE UNIT .........................................................
CONNECT CONDENSATE
DRAIN ......................................
INSTALL FLUE HOOD ..........................................................
INSTALL
INSTALL
GAS PIPING ...........................................................
DUCT CONNECTIONS
......................................
2
2
6
6
7
7
7
8
8
10
A99338
Fig. 1--Unit 48GS and 48GX
CONFIGURING
UNITS FOR DOWNFLOW
(VERTICAL) DISCHARGE ..........................................................
10
INSTALL ELECTRICAL
CONNECTIONS
......................... 12
COMBUSTION-AIR
BLOWER
.......................................
27
HIGH-VOLTAGE
CONNECTIONS
................................
12
SPECIAL PROCEDURES
FOR 208-V OPERATION
...12
CONTROL
VOLTAGE CONNECTIONS
....................... 12
LIMIT SWITCH ................................................................
BURNER IGNITION ........................................................
27
27
MAIN
27
HEAT ANTICIPATOR
SETTING ...................................
TRANSFORMER
PROTECTION ....................................
CONDENSER
CONDENSATE
CONDENSER
COIL, EVAPORATOR
COIL, AND
DRAIN PAN ..........................................
FAN ..........................................................
ELECTRICAL
CONTROLS
PRE-START-UP
START-HE
..........................................................................
15
...................................................................................
15
CHECK FOR REFRIGERANT
LEAKS ...............................
START-UP
HEATING AND MAKE ADJUSTMENTS......16
CHECK
CHECK
HEATING
CONTROL .......................................
GAS INPUT ........................................................
ADJUST
GAS INPUT
12
15
......................................................
BURNERS
.............................................................
AND WIRING
.................. 28
REFRIGERANT
CIRCUIT ...............................................
GAS INPUT ......................................................................
15
27
28
28
28
EVAPORATOR
AIRFLOW .............................................
28
METERING
DEVICE -- ACUTROL DEVICE ............. 28
16
16
LIQUID
LINE STRAINER
..............................................
28
16
TROUBLESHOOTING
...............................................................
28
............................................................
28
CHECK BURNER FLAME ..............................................
AIRFLOW AND TEMPERATURE
RISE .......................
19
19
HEATING
SEQUENCE OF OPERATION .....................
LIMIT SWITCHES ...........................................................
19
19
NOTE TO INSTALLER-Before the installation, READ THESE
INSTRUCTIONS
CAREFULLY
AND COMPLETELY.
Also,
AUXILIARY
LIMIT SWITCH (ROLLOUT) .................. 19
START-UP
COOLING
AND MAKE ADJUSTMENTS......20
CHECKING
COOLING CONTROL
OPERATION .......20
make sure the User's Manual and Replacement Guide are left with
the unit after installation.
The furnace is NOT to be used for
START-UP
temporary
CHECKLIST
beating of buildings
or structures
under
construction.
CHECKING
AND
ADJUSTING
REFRIGERANT
CHARGE ...........................................................................
20
INDOOR
AIRFLOW
AND
AIRFLOW
ADJUSTMENTS ..............................................................................
21
COOLING
SEQUENCE
OF OPERATION
.....................
MAINTENANCE
.........................................................................
AIR FILTER ......................................................................
EVAPORATOR
BLOWER AND MOTOR .....................
FLUE GAS PASSAGEWAYS
.........................................
Manufacturer
SAFETY CONSIDERATIONS
21
21
24
Installation and servicing of air-conditioning
hazardous due to system pressure and electrical
24
26
trained and qualified personnel
air-conditioning
equipment.
should
install
equipment can be
components. Only
repair,
or service
reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring otiligations.
PC 101
Printed ir_ U.S.A.
Catalog NO. 48GS,GX-TSI
Pg 1
2-06
Replaces: New
Untrained
cleaning
personnel
by trained
equipment,
attached
Follow
can perform
basic maintenance
coils and filters. All other operations
functions
of
should be performed
service personnel. When working on air-conditioning
observe precautions
in the literature, tags, and labels
to the unit, and other safety
precautions
that may apply.
all safety codes. Wear safety gla.gses and work gloves. Use
quenching cloth for unbrazing operations.
available for all brazing operations.
Improper
nance,
installation,
or u_
adjustment,
Have fire extinguisher
alteration,
can cause carbon monoxide
service,
poisoning,
an explosion
which can result in personal
damage. Consult a qualified installer, service
mainte-
and job data. Verify unit voltage and amperage
on unit rating plate agree with power supply
INSPECT
injury or unit
agency, or gas
SIUPMENT
have it examined by transportation
inspectors
Forward claim papers directly to transportation
facturer
is not responsible
for any damage
Check
all items
against
shipping
nearest
distributor
if any item is missing.
operations
incurred
in transit.
list. Immediately
leave
notify
all parts in original
the
packages
1. Remove unit from shipping carton. Leave top shipping skid on
the unit as a spreader bar to prevent the rigging straps from
damaging the unit. If the wood skid is not available, use a
spreader
service or maintenance
before removal.
company. Manu-
INSTALLATION
supplier for information or assistance. The qualified installer
or agency must use only factory-authorized
kits or accessories
when modifying this product.
Before performing
listed
to unit.
Inspect for shipping damage while unit is still on shipping pallet.
If unit appears to be damaged or is torn loose from its anchorage,
To prevent loss or damage,
until installation.
fire, or
requirements
provided
bar of sufficient
length to protect unit from damage.
2. Position the lifting bracket assembly around
unit. Be sure the strap does not twist.
on unit,
turn off gas supply to unit. Then turn off unit main power
switch and install lockout tag. Electrical shock or explosion
could cause serious injury or death.
the base of the
3. Place each of the 4 metal lifting brackets
in the composite pan.
into the rigging holds
4. Thread lifting bracket
unit as follows:
around
bottom
(ratchet
type).
strapping
perimeter
of
Recognize safety information. This is the safety-alert symbolzf x .
When you see this symbol in instructions or manuals, be alert to
a. Open lever
the potential
b. Feed strapping
through tension buckle as shown in Fig. 7.
c. Pull strapping
through tension buckle
Understand
for personal
injury.
the signal words DANGER,
WARNING,
CAUTION,
and NOTE. These words are used with the safety-alert
symbol.
DANGER identifies the most serious hazards which will result in
serious injury or death. WARNING
result in serious injury or death.
signifies a hazard which could
CAUTION
is used to identify
unsafe practices which would result in minor personal injury or
product and property damage. NOTE is used to highlight suggestions which
operation.
These
will
result
in enhanced
installation,
reliability,
or
existing national
these instructions
cover minimum
standards
exceed
requirements
and conform
to
and safety codes. In some instances,
certain local codes and ordinances,
especially those that may not have kept up with changing residential construction
practices. We require these instructions
as a
minimum for a safe installation.
and 48GX
permit
Models
the tension
must be secure
6. Attach
buckle
with an N in the fifth position
of the model
number
are
dedicated
Low NO x units designed for California
installation.
These models meet the California
maximum oxides of nitrogen
(NO,) emissions requirements
of 40 nanograms/joule
or less as
shipped from the factory and must be installed in California Air
Quality Management
Districts where a Low NO_ rule exists.
RECEIVING AND INSTALLATION
Step I_HECK
EQUIPMENT
UN1T
The unit model number and serial number are stamped on unit
identification
plate. Check this information against shipping papers
until
clevis
4 rigging brackets.
lifting brackets
brackets
or hook of sufficient
strength
to
(See Fig. 7).
7. Attach the 2 safety straps directly
8. Position
it is taut. Lifting
in the rigging holds.
field-supplied
to the clevis or hook at the
DO NOT attach the safety straps to the
(See Fig. 7).
lifting point directly
9. Lift unit. When unit is directly
over the unit's
center of gravity.
over the roof curb, remove
2 safety straps. Lower the equipment
ROOF CURB
(See Fig. 4 for roof curb dimensions).
IDENTIFY
5. Tighten
Step 2--PROVIDE
duct openings covered. Units may be installed either on
a cement slab, or directly on the ground if local codes
unit taut.
squeeze safety latch, lift lever, and pull webbing
INTRODUCTION
unit sizes have return and discharge openings for both horizontal
and downffuw configurations,
and are factory shipped with all
downflow
a rooftop,
strapping,
outward.
units (See Fig. 1) are fully self-contained,
combination Category I gas heating/electric
cooling units designec[
for outdoor installation (See Fig. 2 and 3 for unit dimensions).
All
buckle
d. Snap lever down to lock strap in tension buckle. To relea._e
hole in the lifting bracket
instructions
The 48GS
of tension
the
onto the roof curb.
UNIT SUPPORT
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4 for roof curb dimensions). Install insulation,
cant strips,
curb.
roofing,
IMPORTANT:
and flashing.
Ductwork
must be attached
to
The ga,sketing of the unit to the roof curb is critical
for a watertight seal. Install ga.sheting material supplied with the
roof curb. Improperly applied gasketing can also result in air leaks
and poor unit performance.
Curb should be level to within I/4 in. This is necessary for unit
drain to function properly. Refer to accessory roof curb installation
instructions for additional information
as required.
SLAB MOUNT
Place the unit on a solid, level concrete
pad that is a minimum
of
4 in. thick with 2 in. above grade. The slab should be flush on the
compressor end of the unit (to allow condensate drain installation)
and .should extend 2 in. on the three remaining sides of the unit
(See Fig. 6). Do not secure the unit to the slab except when
required by local codes.
eLocKorrP_.[L r_ _e O'NL_
'"11111
_11111111 III
suPeL_
ae 3 --
TOP VIEW
REAR
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
REQUIRED CLEARANCE FOROPERATION AND SERVICING
INCHES
TOP OF UNIT ...................................................................................
14.00
DUCT SIDE OF UNIT ................................................................
2.00
SIDE OPPOSPTE DUCTS ...............................................................
14.00
BOTTOM OF UN T
0 50
ELECTR C HEAT PANEL"
i_ iiiii_i.iii.i ,
, i :'i"i "" " "36"00
[ram]
[355¸6
[508]
(355 6]
12
[914714]
NEC.
REQUIRED
CLEARANCES.
INCHES
BETWEEN UNITS, pOWER ENTRY S DE ..............................
4200
UNIT AND UNGROUNDED
SURFACES, POWER ENTRY SIDE .36.00
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY S_DE ......................... 42,00
[mm
[1066.8
[914 O]
EVAP COIL ACCESS SIDE .......................................................
POWER ENTRY SIDE .......................................................
(EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP .............................................................................
SIDE OPPOSITE DUCTS ..............................................................
DUCT PANEL ......................................................................
INCHES [mini
36.00 [9140 1
36¸00 [914.0 I
48 00 [1219.2]
36¸00 [914 O]
12 00 [304.8] *
+MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12.00 [304.8] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE
MAYBE COMPROMISE.
[1066 8]
LEGEND
CG - Center of Gravity
COND Condensor
EVAP - Evaporator
NEC - National Bectrical Code
9EQ'D +Required
NOTE: Dimensions are In If] [mm]
--
7+e m -t+c+4)
t
' +illllllllllll +
_ _1_
1
\\
+'+'+p+_,_++
++++;
, !lllllllllllllllll
\
__
'
/_-
" _Gr_'_
"
"1 "
_
1
k
'
\ .......
E_tRIC_L
14
B
l
_¢¢ESS p_N[L
i;'+"++,
-- -8_Le
LEFT SIDE VIEW
FRONT VIEW
RIGHT SIDE VIEW
C0(X)55
UNIT
48GS030040/060
ELECTRICAL
CHARACTERISTICS
208/230-34_0
Ib
kg
X
CENTER OF GRAVITY
IN. (MM)
Y
280.0
127.3
35.02 (5893)
21.5 (546.1)
13,75 (349,3)
15.0 (381.0)
UNIT WEIGHT
UNIT HEIGHT IN. (MM)
"A"
Z
48GS036OR0i090
208/230-3_0,
460-3-50
320.0
145.1
37.02 (940.3)
22.5 (571.5)
14.0 (355.6)
13.0 (330.2)
48GS042060/090
208/230_34_0, 460-3-60
355.0
161.4
35.0_ (889.5)
21.5 (546.1)
13.5 (342.9)
13.0 (330.2)
48GX030040/060
208/230-3-60
313.0
142.0
39,02 (991,1)
22,0 (558,8)
15.3 (987.4)
17.6 (447.0)
48GX036060/090
208/230-3-60, 460-3-60
321.0
145.6
35.02 (989.5)
22.0 (558.8)
15.3 (387.4)
16.5 (419.1)
Fig. 2_8GS030-042
and 48GX030-036 Unit Dimensions
SUPPL_
D[TU_M
0P_WING
0pEWIN_
!
i
i
{4 t_:
_ 3
TOP VIEW
REAR VIEW
REQUIRED CLEARANCE TO COMmJSTIBLE MAll.
TOP OF UNIT ................................................................................
DUCT SIDE OF UNIT ........................................................................
SIDE OPPOSITE DUCTS ................................................................
ELECTRIC
HEAT PANEL
................................................................
BO'[TOM OFUNIT...:
........................................................................
REI_IIRB)
INCHES
14.00
2.00
14.0'3
tmm]
355.6
_50.8
[355.6
36.C_
0.50 [914.4]
12.7]
CLEARANCE FOROPERATION AND SERVICING
INCHES [mm]
36.00 [914.0]
36.00 [914.0}
EVAR COIL ACCESS SIDE ............................................................
POWER ENTRY SIDE ..................................................................
(EXCEPT FOR NEE REQUIREMENTS)
UNIT
.......................................................................................
SIDE TOp
OPPOSITE
DUCTS ............................................................
DUCT PANEL ...............................................................................
48.00
1219.2 I
36.001914.0]1
12.00 [304.8] *
NEE. REQUIRED CLEARANCES.
INCHES
BETWEEN UNITS, pOWER ENTRY SIDE .................................... 4200
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE ,3600
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES POWER ENTRY SIDE ......................... 4200
[mm]
[1066.8]
[914.0]
*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 12.00 [304.8] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.
[1066.8]
LEGEND
CG - Center of Gravity
COND
Condensor
EVAP Evaporator
NEE National Electrical Code
REQ'D Required
Hs _
NOTE: Dimensions =e in in [mini
..........
_ _ io _e] DI_ WOE[
_- .....
\,,,,,
\
llllIllllllllllll
m
[.......
r
..
[5._II
FRONT VIEW
RIGIIT _DE VIEW
C00056
ELECTRICAL
UNIT
CHARACTERISTICS
UNIT WEIGHT
UNIT HEIGHT IN. (MM)
Ib
kg
460-3-60
415
188.6
38.98 (990.2)
208./230-3-60, 460-3-60
450
204.5
38.98 (990.2)
22 (558.5)
16 (406.4)
17 (432._
208/230-3-60,
460-3-60
382
173.3
38.98 (990.2)
23.0 (584.2)
16.3 (412,8)
16.6 (421.6)
30
208/230-3-60,
460-3-60
421
191.0
38.98 (999.2)
21.5 (545.1)
16.6 (422.1)
18.0 (457.2)
48GX060090/115/1 30
208/230-3-60,
460-3-60
468
212.3
42.98 (1091.1)
23.5 (596.9)
15.3 (412.8)
17.6 (447.0)
48GS04809Q/115il
30
48GS060090H 15/130
48GX042060/090
48GX048090/115il
208/230-3-60,
Fig. 3_48GS048-060
X
CENTER OF GRAVITY
IN. (MM)
Y
22 (558.5)
and 48GX042-060 Unit Dimensions
4
15 (406.4)
Z
17 (432.0)
VACunit
! _ii!_i_ iiiii!i!i!_i
__Screw
_.g
nailer*
_n
f_ii_i
FIasSuk
__ piefdS
t_do
I
I_11 _H" Insusttion(field
field supplied -Du_
_l_
_fieldsupplied
R_f
Roof Curb for Small Cabinet
Roof Curb for
Note A:When unit mounting screw is used
retainer bracket
must also be used.
Large Cabinet
Note A:When unit mounting screw is used
retainer bracket must also be used.
\/
\
R/A
\
Insulated
deckpan
S/A
Gasket around
duct
/\
Gasket around
outer edge _
N
C00076
UNIT SIZE
48GS030-042
48GS048-060
48GX030-036
48GX042-060
CPRFCURB006A0O
A
IN.(MM)
8 (203)
CPRFCURB007AOO
14 (356)
11(279)
11(279)
CPRFCURB008A00
8 (203)
14 (356)
163/16 (411)
163/16 (411)
ODS CATALOG NUMBER
B
IN. (MM)
C
IN. (MM)
161/2 (419)
161/2 (419)
17 3/8 (441)
D
IN. (MM)
29-3/4
28-3/4
40-1/4
(730)
(730)
(1022)
CPRFCURB009A00
17 3/9 (441)
40-1/4 (1022)
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal etdp must be applied, as required, to unit being installed.
3. Dimensions in ( ) are in millimeters.
4. Roof curb is made of 16-gage steel.
5 Table I sts only he d mensions, per part number that have changed.
6. Attach ductwork to curb flanges of duct rest on curb.
7. nsuated panals: 1-in. hickfibergass
b density.
8. Dimensions are in inches.
9. Wl_en unit mounting screw is used (see Note A), a retainer bracket must be used as well. This bracket must also be used when required by code for hurricane or
seismic conditions. This bracket is available through Micrometl.
Fig. 4---Roof Curb Dimensions
2
Y
4
x
3
COO070
48GS
CORNER #
48GX
030
036
042
048
060
030
036
042
048
060
1
53.2
59.7
67.5
78.9
85.5
59.5
61.O
72.6
80.0
88.9
2
50.4
56.5
63,9
74.7
81,0
56,3
57.8
68.8
75,8
84.2
3
86.8
97.3
110.1
128.7
139.5
97.0
99,5
118.4
130.5
145.1
4
89.6
106.5
113.6
132.8
144.0
100.2
102,7
122.2
134.7
149.8
TOTAL WEIGHT
250
320
355
415
450
313
321
382
421
465
Fig. 5_48GS and 48GX Unit Corner Weights
J
J
MINIMUMHEIGHT: _"
DETAIL A
SEE DETAIL AJ
EVAR
COIL
COND.
COIL
C99014
Fig. 6_Slab Mounting Details
A05179
SIZE
I""X'MU 'WE'k
I 'nHT
l in
mrn
UNIT 48GS
GROUND
MOUNT
The unit may be installed
either on a slab or placed directly on the
ground if local codes permit. Place the unit
prepared with gravel for condensate di_harge.
on level
ground
030
302
137.3
21.5
546.1
13,75
349.3
036
342
155.1
22.5
571.5
14,0
355.6
042
377
171.4
21.5
546.1
13.5
342.9
048
437
198.6
22.0
556.5
17.0
432.0
060
472
214.5
22.0
558,5
17.0
432.0
Step 3---FIELD FABRICATE DUC'FWORK
Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to uniL For horizontal
applications,
unit is provided
with flanges on the horizontal
openings. Installation
of flexible duct connector is recommended
to prevent transmission
of vibration and/or noise to structure. All
UNIT
48GX
030
335
152
22.0
558.5
15.30
388.6
036
343
156
22.0
558.5
16.30
388.6
042
404
183
23.0
584,2
16.3
414,0
048
443
201
21.5
546.1
16.3
414.0
060
490
222
23.5
596.9
16.3
414.3
Fig, 7--Suggested
Rigging
Table 1--Physical
Data--Unit 48GS
UNIT SIZE 48GS
030040
030060
036060
036690
042060
NOMINAL CAPACITY (ton)
2½
2½
3
3
3½
OPERATING WEIGHT (lb.)
COMPRESSORS
Quantity
REFRIGERANT (R-22)
Quantity (lb.)
280
280
320
320
355
042090
31/2
355
Reciprocating
1
3.65
3,65
I
4.4
4.4
Acutrol
REFRIGERANT METERING DEVICE
Orifice ID (in.)
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Clm
Diameter (in.)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows...Fins/in.
Face Area ($q ft)
EVAPORATOR BLOWER
Nominal Airflow (C/m)
Size (in.)
Motor HP (Rpm)
5.7
I
5.7
Device
.034
.O34
.032
,032
.O34
.O34
1...17
9.1
1...17
9.1
1...17
10.9
1...17
10.9
1...17
9.1
1...17
9.1
2400
22
1/8 (625)
2400
22
1/8 (825)
3000
22
_A(1100)
3000
22
,_i (1100)
3000
22
_A (1100)
3000
22
2...15
3.1
2._15
3.1
3._15
3.1
3...15
3.1
4...15
3.1
4...15
3.1
1000
10 x 10
1/4(1075)
1000
10 x 10
1/4 (1075)
1200
11 x 10
1/2 (1075)
1200
11 x 10
1/2 (1075)
1400
11 x 10
1400
11 x 10
3/4 (1076)
3/4 (1075)
2-.46
2...38
2...46
3_,38
3...46
20 X 20
20 X 24
20 X 24
FURNACE SECTION*
Burner Orifice No. (Qty...Orill Size)
Natural Gas
Burner Orifice No. (Qty.-Drill Size)
Propane Gas
2...45
2...50
RETURN-AIR FILTERS (in.)t
Throwaway
• Basedonaltitudeof 0 to 2000 It.
TM
2...38
20 x 20
(11oo)
2...3_
3...38
2...46
3...46
20 x 24
20 X 24
i" Required filter sizes shown are based on the larger of the AR] (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating ain'low velocity of 300
if]minute for throwaway type or 450 ft]rninute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.
ductwork should
proof all external
flashing
be secured to the flanges. Insulate and weatherductwork, joints, and roof openings with counter
and mastic in accordance
Ducts passing
and covered
through
with applicable
an unconditioned
codes.
space must be insulated
with a vapor barrier.
If a plenum
return
ducted through
is used on a vertical
the roof deck to comply
unit, the return should be
with applicable
A minimum clearance is not required around
return-air static shall not exceed -.25 in. wg.
Step 4--PROVIDE
The required
operating
Step 5--RIG
AND PLACE UNIT
Cabinet
support the additional
and service clearances
are shown
in Fig. 2 and 3. Adequate combustion,
ventilation and condenser
air must be provided
in accordance
with section 5.3, Air for
Combustion and Ventilation, of the National Fuel Gas Code ANSI
(American
provisions
carpeting, tile, or other combustible
materialS. The unit may be
installed on wood flooring or on Class A, B, or C roof covering
materials.
fire codes.
ductwork.
CLEARANCES
minimum
Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. Do not install die unit on
National
Standards Institute)
Z223.1
or applicable
of local building code. In Canada, follow sections 7.2,
7.3, or 7.4 or Can/CGA.
(Canadian
Gas Association)
Installation Codes or applicable provisions of local building
B149
code.
Use spreader bars or crate top when rigging the unit. The units
must be rigged for lifting (See Fig. 6). Refer to Table 1 and 2 for
operating
weight.
Use extreme
caution
to prevent
damage
when
moving the unit. Unit must remain in an upright position during all
rigging and moving operatiottv.The
unit must be level within 1/4"'
for proper condensate drainage; therefore, the ground-level
pad or
accessory
roof curb must be level before
setting die unit in place.
When a field-fabricated
support is used, be sure that the support is
level and properly supports die unit. Lifting point should be
directly
over the center of gravity
Step 6--CONNECT
compressor
weight.
for the unit.
CONDENSATE
DRAIN
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
life.
The condenser fan pulls air through the condenser
coil and
discharges it through the top cover. Be sure that the fan discharge
does not recirculate to the condenser coll. Do not locate the unit in
Models 48GS
either
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground-
a corner
or under
a partial
an overhead
overhang
obstruction.
(such
The minimum
clearance
under
as a normal
house
overhang)
extension
is 48-in. above the unit top. The maximum horizontal
of a partial overhang must not exceed 48-in..
and 48GX dispose
of condensate
3/4 in. NPT fitting which exits through
panel (See Fig. 2 and 3 for location).
water
through
the compressor
a
access
level installations. Install a field-supplied condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
Table 1--Physical
Data--Unit 48GS (Continued)
UNIT SIZE 48GS
048090
048115
048130
060090
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb.)
COMPRESSORS
Quantity
REFRIGERANT (R-22)
Quantity (lb.)
4
415
4
415
4
415
5
450
Scroll
1
6.0
I
6.0
060115
5
060130
5
450
450
Reciprocating
1
!
6.0
8.0
I g° I 60
Acutrol Device
REFRIGERANT METERING DEVICE
Orifice ID (in.)
CONDENSER COIL
Rows.- Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows._Fins/in.
Face Area (sq It)
EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor Hp (Rpm)
FURNACE SECTION*
Burner Orifice No. (Qty._Drill Size)
Natural Gas
Burner Orifice No. (Qty...Drill Size)
Propane Gas
.O32
.032
.032
,030
,030
.030
1...17
12,3
1,,,17
12.3
1..,17
12.3
2...17
12.3
2-,17
12.3
2...17
12.3
3600
22
3600
22
!4 (1100)
3600
22
1,4(1100)
3600
22
1,4(1100)
3...15
4.7
3...15
4.7
3...15
4.7
4...15
4.7
4...15
4.7
4...15
4.7
1600
11 x lO
3/4 (1075)
1600
11X10
314 (1075)
1600
11X10
3/4 (1075)
2000
11X10
1.0 (1075)
2000
11 X 10
1.0 (1075)
2000
11 X 10
3...38
3.,.46
3.-33
3...42
3...31
3...41
3...38
3...46
24X30
24X30
1A(11o0)
RETURN-AIR FILTERS (in.)t
Throwaway
* Basedon altitudeof0 to 2000 ft.
24X30
24X30
3600
22
1,4(1100)
36OO
22
t4 (110o)
1.0(1075)
3...31
3...41
3,,,33
3...42
24 X 30
24 X 30
t Required filter sizes shown are based on the larger of the ARI Air Conditioning and Refrigeration Institute) rated cooling airflow or the hea ing a rf ow ve oclty o 300
Wrn nste or throwaway type or 450 if/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg,
the oudet of the trap is at least
1 in. lower
than the drain pan
NOTE:
Dedicated
low NO_ models MUST
condensate connection to prevent the pan from overflowing
(See
Fig. 8). Prime the trap with water. When using a gravel apron,
make sure it slopes away from the unit.
fornia Air quahty
exists.
If the installation
(NO,) emissions requirements
shipped from the factory.
requires
draining
the condensate
water
away
from the unit, install a 2-in. trap at the condensate connection to
ensure proper drainage (See Fig. 8). Make sure that the outlet of
the trap is at hi&st 1 in. lower than the drainpan
condensate
connection.
This prevents
the pan from overflowing.
These
models
Management
Districts
meet the California
be installed
in Cali-
where a Low NO_ rule
maximum
oxides
of nitrogen
of 40 nanograms/joule
or less as
NOTE: Low NO. requirements ap-ply only to natural gas installations.
Prime the trap with water. Connect a drain tube -using a minimum
of 3/4-in. PVC or 314-in. copper pipe (all field-supplied)
- at the
outlet
end of the 2-in. trap. Do not undersize
the tube. Pitch the
drain tube downward at a slope of at least 1-in. for every
horizontal run. Be sure to check the drain tube for leaks.
10 R of
TRAP
OUTLET
Install the flue hood as follows:
1. This ir_tallation must conform with local building codes and
with the National Fuel Gas Code (NFGC), ANSI Z223.1 (in
Canada, CAN/CGA B149.1,
Fire Protection Association)
2"
i
rain.
2. Remove
q
t
C00009
Fig. 8--Condensate
Step 7--INSTALL
Trap
FLUE HOOD
The flue hood assembly
is shipped
cial and local plumbing
applicable local codes.
screwed
to the coil panel in the
the service
access
panel to
or wastewa_r
flue hood from shipping
compartment).
location
Place vent cap assembly
codes
and
other
(inside the blower
over flue panel. Orient
screw holes in vent cap with holes in the flue panel.
3. Secure flue hood to flue panel by inserting a single screw on
the right side and the left side of the hood.
Step 8---INSTALL
indoor blower compartment.
Remove
locate the assembly (See Fig. 27).
and B149.2) or NFPA (National
latest revision. Refer to Provin-
GAS PIPING
The gas supply pipe enters the unit through the access hole
provided. The gas connection to the unit is made to the 1/2-in. FPT
gas inlet on the manual
shutoff
or gas valve.
Table 2--Physical
UNIT SIZE 48GX
030040
030060
NOMINAL CAPACITY (ton)
2½
313
2½
313
OPERATING WEIGHT (lb.)
COMPRESSORS
Quantity
REFRIGERANT (R-22)
Quantity (lb.)
REFRIGERANT METERING DEVICE
Orifice ID (in.)
CONDENSER COIL
Rows.-Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Ctm
Diameter (in.)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows...Fins/in.
Face Area (sq ft)
EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor Hp (Rpm)
FURNACE SECTION*
Burner Orifice No. (Qty.-Drill Size)
Natural Gas
Burner Orifice No. (Qty...Dri0 Size)
Propane Gas
Data--Unit 48GX
036060
042060
_6060
3
3
321
042090
3½
3½
382
382
_roll
1
4.4
4.4
5.2
5.2
6.4
6.4
.030
.030
.032
.032
.034
.034
1...17
12.7
1...17
12.7
2...17
9.1
2...17
9.1
2...17
12.3
2...17
12.3
2350
22
2350
22
2350
22
2350
22
3300
22
3300
22
1/8 (825)
1/8 (825)
1/8 (825)
1/8 (825)
1/8 (825)
1/8 (825)
3...15
3.1
3...15
3.1
3...15
3.7
3...15
3.7
3...15
4.7
3...15
4.7
106O
10x10
1/4 (1075)
1006
lOX10
1/4 (1075)
1200
11 X 10
1/2 (1075)
1200
11X10
1/2 (1075)
2...44
2,,.50
RETURN-AIR FILTERS (in.)t
Throwaway
• Based on altitude of 0 to2000 ft.
20 X 20
1400
11X 10
3/4 (1075)
2...38
2,,,38
3,,,38
2..,38
2...46
2...46
3,,,46
2..,46
20 X 20
20 X 24
20 X 24
1400
11X 10
3/4 (1075)
3...38
3...46
24 X 30
24 X 30
f Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300
if]minute for high-capacity type. Air riser pressure drop for non-standard filters must not exceed 0.08 in. wg.
Install a gas supply line that runs to the heating section. Refer to
Table 3 and the NFGC for gas pipe sizing. Do not use cast-iron
pipe. It is recommended
that a black iron pipe is used. Check the
local utility for recommendations
concerning
existing tines. Size
gas supply piping for 0.5 in. wg maximum pressure drop. Never
use pipe smaller than the 1/2-in. FPT gas ial_'t on the unit gas
valve.
For natural gas applications, the gas pressure at unit gas connection
must not be less than 4.0 in. wg or greater than 13 in. wg while the
unit is operating. For propane applications, the gas pressure must
not be less than 7.0 in. wg or greater
than 13 in. wg at the unit
connection.
An l/8-in.
NPT plugged
tapping,
accessible
tion, must be installed immediately
connection to the gas valve.
for test gage connec-
upstream
pertinent
CAN/CGA B149.1, (2)-M86). In
codes, adhere to the following
recommendations:
1. Avoid low spots in long runs of pipe. Grade all pipe 1/4 in. in
every 15 ft to prevent
traps. Grade all horizontal
runs
downward to risers. Use risers to connect to heating section
and to meter.
2. Protect
all segments
of piping
system
against
physical
and
thermal damage. Support all piping with appropriate
straps,
bangers, etc. Use a minimum of one hanger every 6 ft. For
pipe sizes larger than l/2 in., follow recommendations
of
national codes.
3. Apply joint compound (pipe dope) sparingly and only to male
threads of jc;mt when making pipe connections. Use only pipe
dope that is resistant
to action of liquefied
by local and/or
national
codes.
Never
use Teflon
tape.
4.
Install sediment trap in riser leading to heating _ction (See
Fig. 9). This drip leg functions
a.s a trap for dirt and
condensate.
5. Install
an accessible,
external,
gas supply pipe within
6. Install ground-joint
unit manual shutoff
7. Pressure-test
national
unit.
all
plumbing
manual
main shutoff
6 ft of heating
valve in
section.
union close to heating section between
and external manual main shut-off valve.
gas
and
piping
gas
in
codes
accordance
before
with
connecting
local
and
piping
to
of the gas supply
When installing the gas supply fine, observe local codes pertaining
to gas pipe installations.
Refer to the NFGC ANSI Z223.1-1988
NFPA latest edition (in Canada,
the absence
of local building
specified
petroleum
gases as
NOTE: Pressure test the gas supply system after the gas supply
piping is connected to the gas valve. The supply piping must be
disconnected from the gas valve during the testing of the piping
systero_s when test pressure is in excess of 0.5 palg. Pressure test
the gas supply piping
system at pressures
equal to or less than 0.5
psig. The unit heating section must be isolated from the gas piping
system by closing the external main manual shutoff valve and
slightly opening the ground-joint union.
Wl E_
Unstable
manifold
operation may occur when the gas valve and
assembly are forced out of position while connect-
ing improperly-routed
rigid ga_s piping to the gas valve. Use
a backup wrench when making connection to avoid strain on,
or distortion
of, the ga._ control
piping.
Table 2--Physical
UNIT SIZE 48GX
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb.)
COMPRESSORS
Quantity
Data--Unit 48GX (Continued)
048090
4
048115
4
048130
4
060090
5
060115
5
060130
5
421
421
421
468
468
468
3.1
8.1
Scroll
1
REFRIGERANT (R-22)
Quantity (lb.)
8.3
REFRIGERANT METERING DEVICE
Orifice ID (in.)
I 03 I 83 r 81
I
Acutml Device
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
CONDENSER FAN
Nominal Cfm
Diameter (in,)
Motor Hp (Rpm)
EVAPORATOR COIL
Rows,,.Finslin.
Face Area (sq ft)
EVAPORATOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor Hp (Rpm)
FURNACE SECTION*
Burner Orifice No. (Qty...Drill Size)
Natural Gas
Burner Orifice No. (Qty...Drill Size)
Propane Gas
.O34
.034
.034
,032
.032
.O32
2...17
12.3
2...17
12.3
2...17
12.3
2...17
16.4
2-.17
16,4
2...17
16.4
33O0
22
¼ (1100)
3300
22
_A(1100)
3300
22
_A(1100)
3300
22
¼ (1100)
3300
22
3300
22
(1100)
4...15
4.7
4...15
4.7
4...15
4.7
4...15
4.7
1600
11X 10
3/4 (1075)
1600
11X10
3/4 (1075)
1600
11X10
3/4 (1076)
1750
11X10
1,0 (1075)
3...33
3...42
3,,.31
3...41
3.-38
3...46
24X30
24X30
24X30
3,..38
3..,46
RETURN-AIR FILTERS (in.)t
Throwaway
24 X 30
1A (1100)
'
4...15
4.7
4...15
4.7
1750
11X 10
1.0 (1075)
1750
11 X 10
1.0 (1075)
3...42
3...31
3,,.41
24 X 30
24 X 30
3.,.33
• Basedonaltitude of 0 to 2000 ft.
_"Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300
if/minute for high-capacity type. Air tilter pressure drop for non-standard filters must not exceed 0.08 in. wg.
Table 3_Maximum
NOMINAL
IRON PIPE,
SIZE
(IN.)
½
Gas Flow Capacity*
INTERNAL
DIAMETER
LENGTH OF PIPE, FTt
(IN.)
10
.622
175
120
97
82
73
66
61
57
1
11A
,824
1.049
1.380
360
680
1400
250
465
950
200
375
770
170
320
600
151
285
580
138
260
530
125
240
490
118
220
460
11A
1,610
2100
1460
1180
990
900
810
750
690
650
¾
20
30
40
50
__apacity_fpipeincu__fgasperhrf_rgaspressure_f__5psig_r_ess_Pressuredr_p____5-in_wg
Fire Protection Association NFPA 54.
60
70
80
90
100
126
150
53
50
44
40
110
205
430
103
195
400
620
basedona0.60speci
175
200
93 I 84
175 i 160
i
360 I 325
77
145
300
135
550
460
i 500
cg a',,itygas) Ree
oTabeC_l
72
230
430
National
f This length includes an ordinary number of fittings.
Step 9--INSTALL
DUCT CONNECTIONS
The unit has duct flanges on the supply- and return-air openings on
the side and bottom of the unit. For downshot applications,
the
ductwork
connects
to the roof
connections sizes and locations).
casing.
CONFIGURING
CHARGE
serious
injury
curb
(See
UNITS FOR DOWNFLOW
Fig.
2 and
3 for
(VERTICAL)
DIS-
or death.
cause serious
8. Check for gas leaks at the field-installed and factory-installed
gas lines after all piping connections
have been completed.
Use soap-and-water
solution
codes and/or regulations).
(or method
specified
injury or death.
1. Open all electrical
work.
by local
10
disconnects
before
starting
any service
IN
I
3"MIN
I
C99020
Fig. 9_Sediment
2. Remove
Trap
DUCTCOVERSREMOVED
return duct cover located on duct panel by breaking
connecting
& 10B).
tabs with screwdriver
and a hammer
(See Fig. 10A
C99012
Fig. 10B--Vertical Duct Cover Removed
3. To remove supply duct cover, break front and tight side
connecting tabs with a screwdriver and a hammer. Push louver
down to break rear and left side tabs (See Fig. 10A & 10B).
4. If unit ductwork
is to be attached
on the unit composite
at this time.
to veztical
opening
base (jackstand applications
7. After completing unit conversion,
and power up unit.
flanges
only), do so
air conditioning
90A or residence-type,
ordinances.
Adhere
to the
installing
that the unit base
insulation
perimeter of the vertical return-air opening
unit base with aluminum tape. Applicable
require
aluminum tape to prevent
6. Cover both horizontal
the accessory
watertight.
duct
duct openings
cover
exposed
around
following
criteria
for horizontal
2. Select and size ductwork,
is air-
and ventilating
90B;
and/or
when
systems,
local
selecting,
NFPA
codes
and
sizing,
and
the duct system:
1. Units are shipped
duct covers).
fiberglass.
opening
NFPA
the
be secured to the
local codes may
duct installation
supply-air
registers,
(by removing
and return-air
grilles according to American Society of Heating, Refrigeration and Air Conditioning
Engineers (ASHRAE) recommendadons.
with the duct covers from
kit. Ensure
all safety checks
NOTre: The design and installation of the duct system must be in
accordance
with the standards of the NFPA for installation
of
nonresidence-type
5. It is recommended
perform
and
3.
Use
flexible
prevent
transition
transmission
screwed or bolted
ensure weathertight
- t
.I
between
rigid
of vibration.
ductwork
The
to duct flanges. Use
and airtight seal.
and unit to
transition
suitable
may
be
gaskets
to
4.
All units must have field-supplied filters or accessory fdter
rack installed in the return-air side of the unit. Recommended
sizes for filters are shown in Tables 1 and 2.
5.
Size all ductwork
heating or cooling)
size increases
for maximum
required
airflow (either
for unit being installed. Avoid abrupt duet
or decreases
or performance
may be affected.
6. Adequately insulate and weatherproof all ductwork
outdoors. Insulate ducts passing through unconditioned
located
space,
and use vapor barrier in accordance with latest issue of Sheet
Metal and Air Conditioning Contractors National Association
(SMACNA)
and Air Conditioning
Contractors
of America
(ACCA) minimum installation standards for heating and air
,=T---
conditioning
SUPPLY
DUCT
OPENING
7.
RETURN
DUCT
OPENING
Flasli,
building
building
C99011
Fig. 10A Supply and Return Duct Opening
11
systems.
weatherproof,
structure
practices.
Secure all ducts
to building
and vibration-isolate
in accordance
structure.
all openings
with local codes
in
and good
Step 10--INSTALL
ELECTRICAL CONNECTIONS
/_
HIGH VOLTAGE
r._l LI"/_ -'1,'I I",[_
r
- -
-
(SEE UNIT WIRING
POWER LEADS
l_ _oLABEL)
The unit cabinet
must have an uninterrupted,
unbroken
electrical ground to minimize the possibility of serious injury
if an electrical fault should occur. This ground may consist of
an electrical
rare
connected
to the unit
ground
FIELD-SUPPLIED
FUSED DISCONNECT
lug in the
GND
control compartment,
or conduit approved
for electrical
ground when installed in accordance
with NEC (National
Electrical Code) ANSI/NFPA
(latest edition) and local electrical codes. In Canada, follow Canadian
Electrical
Code
CSA
(Canadian
Standards
Association)
C22.1
and
CONTROL
II
_GRN_(G_)
local
POWER
electrical
codes. Failure to adhere to this warning
in serious
BOX
could re.cull
(SEE UNIT
LOW-VOLTAGE
WIRING LABEL)
injury or death.
_yEpIRc_A_O
_TAT
LEADS_
_i
SPLICE BOX
C99018
Failure
to follow these precautions
could result in damage
the unit being installed:
1. Make all electrical connections
Fig. 11--High- and Control-Voltage connections
to
SPECIAL
in accordance
ANSI/NFPA
(latest edition) and local electrical
codes
governing
such wiring. In Canada, all electrical connections must be in accordance
with CSA standard C22.1
Canadian
codes.
Electrical
Code
Refer to unit wiring
Part
1 and applicable
local
unit and install lockout tag. Electrical
Injury or death.
diagram.
CONTROL
minimum)
Standard
electrical service
switch mounted
(See Tables 4 and 5 for electrical
data).
Run the low-voltage
Locate five 18-gage
2. Connect
ground
ground
4. Connect
field
compressor
5. Connect
to black
wire
on connection
through
the inlet
splice box.
wires leaving
ANTICIPATOR
The room thermostat
control box. These low-voltage
SETTING
heat anticipator
must be properly
adjusted to
ensure proper heating performance.
Set the heat anticipator, using
an ammeter between the W and R terminals to determine the exact
to the lines side
11 of the
contactor.
field wire L2 to yellow wire on connection
compressor
6. Connect
L1
leads from the thermostat,
box and make low-voltage connections
(See Fig. 11). Secure all
cut wires, so that they do not interfere with operation of unit.
leads into the
connection.
3. Locate the black and yellow wires connected
of the contactor.
a drip loop before
to be routed into the low-voltage
splice box (located below fight
side of control box). Route leads through hole in bottom of control
HEAT
lead to chassis
with unit) and install
Provide
connection leads can be identified by the colors red, green, yellow,
brown, and white (See Fig. 11). Ensure the leads are long enough
to the unit.
(LI, L2, L3) and ground
packet (included
hole, and into unit low-voltage
See unit wiring label and Fig. 11 for reference when making high
voltage connections.
Proceed as follows to complete the high-
I. Run the high-voltage
control box.
wires.
grommet in the knockout opening.
running wire through panel.
location).
connections
Unit control
Connection
grommet from the installer's
The lleld-supplied
disconnect switch box may be mounted on the
unit over the high-voltage
inlet hole when the standard power and
low-voltage
entry points are used (See Fig. 2 and 3 for acceptable
voltage
thermostat.
Remove knockout hole located in the flue panel adjacent to the
control access panel (See Fig. 2 and 3). Remove the rubber
with a fieldat, or within
sight from, the unit. Refer to the unit rating plate for maximum
fllse/circdit breaker size and minimum circuit amps (ampacity) for
wire sizing
CONNECTIONS
more than 100 ft from the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded,
insulated
(35 C
imbalance.
a separate
disconnect
shock can cause serious
Use no. 18 American Wire Gage (AWG) color-coded,
insulated
(35 C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
CONNECTIONS
The unit must have
supplied,
waterproof,
VOLTAGE
Do not use any type of power-stealing
problems may result.
any panel to mount electrical hardware, conduit, etc. On
3-phase units, ensure phases are balanced within 2 percent.
Consult local power company for correction of improper
HIGH-VOLTAGE
OPERATION
Before making any wiring changes, make sure the gas supply
is switched off first. Then switch off the power supply to the
3. Be sure that high-voltage power to unit is within operating
voltage range indicated on unit rating plate.
4. Do not damage internal components when drilling through
and/or phase
FOR 208-V
r!_kvl:1:]_llTI
2. Use only copper conductor
for connections
between
field-supplied
electrical disconnect switch and unit. DO
NOT USE ALUMINUM
WIRE.
voltage
PROCEDURES
with NEC
required
_tdng.
NOTE:
For thermostat
approximate
required
anticipator adjustment
fort to the occupants
13 of the
contactor.
selection
purposes,
use 0.18 amp for the
setting. Failure to make a proper heat
will result in improper operation, discomof the conditioned
space, and inefficient
energy utilization; however, the required setting may be changed
slightly to provide a greater degree of comfort for a particular
installation.
field wire L3 to Blue wire from compressor.
12
Table 4--Electrical
UNIT
SIZE
46GS
030
O36
042
O48
O60
V-PH-HZ
VOLTAGE
RANGE
COMPRESSOR
Data--Unit 48GS
OUTDOOR FAN
MOTOR
INDOOR FAN
MOTOR
POWER SUPPLY
Min
Max
RLA
LRA
FLA
FLA
MCA
208/230-3-S0
187
253
12.6
13.2
187
253
9.0
0.8
1.6
2.0
208/230-3--60
68.0
78.0
Max Fuse or
Ckt Bkr
20
460-3-60
414
506
4.5
40.0
0.9
3,6
1.9
16,5
8.4
25
15
208/230-3-60
187
253
10.7
85.0
1.6
3.8
18.8
25
460-3-60
414
506
5.3
42.0
0.9
187
253
13.5
1.6
0.9
2.0
3.8
9.5
22.3
15
35
2.0
11.3
15
6.2
3.2
31.1
14.7
45
20
208/2_0
460-3-60
414
506
6.7
108.0
47.5
208/230-3-60
187
253
18.6
125.0
1.6
460-3-60
414
506
8,5
66.5
0.9
EXAMPLE: Supply voltage is 460-3-60.
A S C
AB = 452 v
AC = 455 v
MCA
Minimum Circuit Amps
MOCP
Maximum Overcurrent Protection
RLA
-- Rated Load Amps
CKT BKR -- Circuit Breaker
Average Voltage = 452 + 464 + 455
3
BC = 464 v
= 1371
3
= 457
_"
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 436 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. Canadian units may be
fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire 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.
Determine maximum deviation from average voltage.
(AB) 457 452=5v
(BC) 464 457=7v
(AC) 457 455=2v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
7
457
-- 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
% Voltage imbalance
= 100 x max voltage deviation from average voita_le
average voltage
I IMPORTANT:
If the supply
voltage
phase imbalance is
immediately,more
than 2%, contact your local electric utility company
13
Table 5_Electrical
UNIT
SIZE
48GX
V-PH-HZ
030
036
042
O48
O60
VOLTAGE
RANGE
Data_nit
COMPRESSOR
48GX
OUTDOOR FAN
MOTOR
INDOOR FAN
MOTOR
POWER SUPPLY
RLA
LRA
FLA
FLA
MCA
253
9.0
63.0
0.8
2.1
14.2
Max Fuse or
Ckt Bkr
20
253
11.2
75.0
0.8
3.6
18.4
25
414
506
5.4
37.5
208/230-3-60
187
253
12,4
88,0
0,9
1.6
1.9
4.1
9.6
21.2
15
30
460-3_0
208/230-3_0
414
187
506
253
6,1
13.0
44.0
93,0
0.9
2.0
10.5
15
1.5
4.1
21.9
30
Min
Max
288/230_3_0
187
2O6/23_0
187
460-3-50
460-3-60
414
506
6.4
46.5
0.9
1.9
10.8
15
208/230-3-60
187
253
17.3
123.0
460-3_$0
414
506
9.0
62,0
1.6
0,9
6.2
3.2
29.4
15.4
45
20
EXAMPLE: Supply voltage is 460-3-60,
A e c
AB = 452 v
FLA
-- Full Load Amps
LRA
-- Locked
Rotor Amps
C
LEGEND
MCA
-- Minimum Circuit Amps
MOCP -- Maximum Ovemurrent Protection
RLA
-- Rated Load Amps
CKT BKR -- Circuit Breaker
AC = 455 v
US
Average Voltage = 452 + 464 + 455
3
BC = 464 v
= 1371
3
= 457
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for muitimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent prote_ive device for the
unit shall be Power Supply fuse. Canadian units may be
fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire 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 imba/ance in supply volt=
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.
Determine maximum deviation from average voltage.
(AB) 457 452=5v
(BC) 464 457=7v
(AC) 457 455=2v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x -457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
% Voltage imbalance
= tOO x
max voltage deviation from average voltage
average voltage
IMPORTANT:olf
the
supply
itmnOmredlhataer_y2
%, contact your
voltage phase
imbalance is
local electric utility company
C99024
Table 5_Legend
14
TRANSFORMER PROTECTION
the "OFF"
position:
If the gas supply pipe was not purged before connecting
the unit, it will be full of air. It is recommended that the
The transformer is of the energy-limiting type. It is set to
withstand a 30°sec. overload or shorted secondary condition.
ground joint
PPdE-START-UP
union be loosened,
and the supply line be
allowed to purge until the odor of gas is detected.
Never
purge gas lines into a combustion chamber. Immediately
upon detection of gas odor, retighten the union. Allow 5
Failure
to observe
the following
serious injury:
1. Follow recognized
safety
warnings
practices
could
result
and wear
in
minutes
compressor
terminal
cover
c. Ensure
and
fan hub is 1/8 in. maximum
from
motor housing
(See Fig. 12).
3. Do not remove compressor terminal
cal sources are disconnected.
4. Relieve
touching
is in place
then light unit.
b. Make sure that condenser-fan
blade is correctly positioned
in fan orifice. Leading edge of condenser-fan blade should
be 1/2 in. maximum from fan orifice ventari.
protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric power to
unit unless
secured.
to elapse,
cover until all electri-
and recover all refrigerant
from system before
or disturbing
anything
inside terminal box ff
refrigerant leak is suspected around compressor terminals.
5. Never attempt to repair soldered connection while refrigerant system is under pressure.
6. Do
not
use torch
to remove
contains oil and refrigerant
component,
wear protective
lows:
a. Shut off gas supply
any componenL
System
under pressure. To remove a
goggles and proceed as fol-
and then electrical
b. Relieve and recover all refrigerant
both high- and low-pressure
ports.
MOTORAND FANHUB
C99009
Fig. 12--Fan Blade Clearance
power to unit.
from
system
MOTORSHAFT
using
c. Cut component connecting tubing with tubing cutter
remove component from unit.
and
d. Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.
Proceed
as follows
to inspect
and prepare
the unit
for initial
startup:
1. Remove
access panel.
2. Read and follow instructions
and INFORMATION
3. Make
the following
a. Inspect
lines,
on all WARNING,
labels attached
CAUTION,
to, or shipped
with, unit.
inspections:
for shipping
and handling
loose parle, disconnected
damages
such as broken
wires, etc.
b. Inspect for oil at all refrigerant tubing connections
and on
unit base. Detecting
oil generally indicates a refrigerant
leak.
c. Leak test all refrigerant
tubing
connections
using electronic
MANIFOLD
leak detector, halide torch, or liquid-soap
solution. If a
refrigerant leak is detected, see the Check for Refrigerant
Leaks section.
d. Inspect all field- and factery-wirlng
connections.
that connections
are completed and tight.
e. Ensure
wires
do not contact
refrigerant
tubing
C99019
Fig. 13_Burner
Be sure
d. Make sure that air falter(s) is in place.
e. Make sure that condensate
or sharp
sheet metal edges.
the following
Assembly
drain trap is filled with water to
ensure proper drainage.
f. Inspect coil f'ms. If damaged during shipping
carefully straighten fins with a i'm comb.
4. Verify
PIPE PLUG
f. Make sure that all tools and miscellaneous
been removed.
and handling,
conditions:
loose parts have
START-UP
Step I_CHECK
FOR REFRIGERANT
LEAKS
Proceed as follows
charge the unit:
to locate and repair a refrigerant
leak and to
1. Locate leak and make sure that refrigerant system pressure has
been relieved and reclaimed from beth high- and low-pressure
por_.
a. Make sure gas line is free of air. Before lighting the unit for
the first time, perform
the following
with the gas valve in
2. Repair
15
leak following
Refrigerant
Service
procedures.
CHECK
BURNER FLAME
Check
Table
BURNER
GAS INPUT
gas input and manifold
6). If adjustment
D
after unit start-up
proceed
(See
as follows:
•
The rated gas inputs shown in Table 6 are for altitudes from sea
level to 2000 fit above sea level. These inputs are based on
natural gas with a heating value of 1050 Btu/ft 3 at 0.65 specific
gravity, or propane gas with a heating value of 2500 Btu/ft 3 at
•
For elevations
1000 ft above
•
When the ga.s supply being used has a different heating value or
specific gravity, refer to national and local codes, or contact
your distributor to determine the required orifice size.
1.5 specific
_IANIFOL
pressure
is required
gravity.
above 2000 ft, reduce input 4 percent
sea level
for each
C99021
Fig. 14_Monoport
NOTE: Install a f-alter drier whenever
for repair.
3. Add a small charge
leak-test unit.
Burner
the system has been opened
of R-22 refrigerant
vapor to system
ADJUST
and
The gas input to the unit is determined
4. Recover refrigerant from refrigerant system and evacuate
500 microns if additional leaks are not found.
to
for required
charge. Be sure
compensate for internal volume
to add extra
of falter drier.
HEATING
AND
refrigerant
MAKE
by measuring
the gas flow
at the meter or by measuring the manifold pressure. Measuring the
gas flow at the meter is recommended
for natural gas units. The
manifold pressure must be measured to determine
the input of
5. Charge unit with R-22 refrigerant,
using a volumetriccharging cylinder or accurate scale. Refer to unit rating plate
Step 2--START-UP
MENTS
GAS INPUT
to
propane
ga_s units.
Measure
Gas Flow (Natural
Gas Units)
Minor adjustment to the gas flow can be made by changing the
manifold pressure. The manifold pressure must be maintained
ADJUST-
between 3.4 and 3.6 in. wg.
If larger adjustments are required,
change main burner orifices following
the recommendations
of national
and local codes.
NOTE:
Do not jumper
Make
sure
any safety devices
that
burner
when operating
OFLfices are properly
operation may occur when the burner orifices
misaligned.
the unit.
aligned.
turned
Unstable
in the manifold
Proceed
are
Follow the fighting instructions on the heating section operation
label (located inside the burner or blower access door) to start the
heating
HEATING
access
that use the same
meter
must
be
at the meter.
as follows:
to unit.
2. Remove
on manifold
pipe plug
(See Fig. 13) and connect
Turn on gas supply to unit.
3. Record number of seconds for gas meter test dial to make one
revolution.
and that all
4. Divide number of seconds
seconds in one hour).
CONTROL
5. Multiply
Start and check the unit for proper heating control operation as
follows (see furnace fighting instructions
located inside burner or
blower
appliances
1. Turn off gas supply
manometer.
section.
NOTE: Make sum that gas supply has been purged,
gas piping has been checked for leaks.
CHECK
All other
off when gas flow is measured
3. The induced-draft
of the thermostat
heating
above
EXAMPLE:
the main burner should
5. The evaporator
Assume
2. 3600+
32=
one
value of the gas is 1050
one revolution.
112.5.
3. 112.5 x 1 =112.5
ft 3 of gas flow/hr.
4. 112.5 x 1050 = 118,125
break the 24-v power to W.
fan will turn on 45 sec. after the flame
of cu fit shown for one
of gas flow per hour.
that the size of test dial ks I cuft.
1. 32 sec. to complete
light within 5
see. If the burners do not fight, there is a 22-see. delay before
another 5-sec. try. If the burners
still do not light, this
sequence is repeated.
If the burners do not light within 15
minutes from the initial call for heat, there is a lockout. To
reset the control,
of
value of gas is not known).
revolution takes 32 sec., and the heating
Btu/ft 3. Proceed as follows:
motor will start.
4. After a call for heating,
of test dial to obtain cuft
(number
6. Multiply result of Step 5 by Btu heating value of gas to obtain
total measured input in Btuh. Compare this value with heating
input shown in Table 6 (Consult the local gas supplier if the
1. Place room thermostat SYSTEM switch in the HEAT position
and the fan switch is placed in ALrrO. position.
control
result of Step 4 by the number
revolution
panel):
2. Set the heating temperature
room temperature.
in Step 3 into 3600
Btuh input.
If the desired gas input is 115,000 Btuh, only a minor change in the
manifold pressure is required.
has
been established. The evaporator fan will turn off 45 sec. after
the thermostat has been satisfied.
Observe
input:
16
manifold
pressure
and proceed
as follows
to adjust
gas
W4.3 BLK
FIELD
OFM
SUPPLY
POWER
10ONLY)
EQUIP
GMG
COMP
W56 BLU[SEE NOTE #4)_
W59YEL--
IFM
W64YEL-W15YEL
COOLINGFANLOGIC
r
T+30
G
G
ENERGIZED DEFNERGIZED
IDM
TRAN1
HEAtiNGFANLOGIC
I
I
o 45
•
T+3O
W BR
W
BR
ENERGIZED DE B_ERG[ZED
W46 BRN--
%
%
OFF
HEAT
I
B
THI
AHA
_HEAT
OAUTO
_CCO
TCl
YI
FAN
G
ON
FIELD=THERMOSTAT
COMMON
--
W30 BRNLEGEND
UNIT COMPONENT ARRANGEMENT
SEGTION
OLFDCORFAN
[]
EQUll
G_D
COMPRESSORINBOORFAN
SECTION
CQMp
"
_ECTION
[_
CO_TROLBOX
_
24V
L_PLICE_)
[BN
_AS SECTIOf_
DISCONNECT
PER NEC
AHA
-
BR
C
CAP
COMPCR
CS
EQUIPFS
FU
GND
GV
GVR
HS
HV
TRAN
]
IDM
IFC
IFM
IGC
-
L1
LS
LS1
MGV
-
-
Adjustable Heat
Anticipator
Blower Relay
Contactor
Capacitor
Compressor Motor
Combustion Relay
Centrifugal Switch
Equipment
Flame Sensor
Fuse
Ground
Gas Valve
Gas Valve Relay
Hall Effect Sensor
High Voltage
Transformer
Ignitor
inducab-Oraft Motor
In.or-Fan
Co_tactor
Indoor-Fan Motor
Integrated Gas Unff
Controller
Line
Limit Switch
Limi_ Switch
Main Gas Velve
NEC
-
ORe
QT
RS
SEN
SW
TRAN
-
_
Reid Splice
_
Terminal(Marked)
_
---....
_
National Electrical
Code
Outdoor-Fan
Motor
QuabrupleTerminel
Rollout Switch
Sensor
Switch
Transformer
O
Terminal (Unmarked)
_
Splice
--
-
--
-
Splice (Marked)
FactoryWidng
I_eld Contro_ Wiring
Reid Power Wiring
Accessory or
Ol_ional Wiring
To Indicate Common
Potential Oely, Not
toRedrcsentWiring
NOTES:
1. If any of the odginel wires furniabed are reol_ced, thay must be
replaced with type 90 degree C wire or its equivalent.
2. Seepricopagesforthermostatandsubbases.
3. Use 75 degree C copper conductors for field installation.
4. For high speed IFM, dis_3nnect RED wire from IGC terminal BM
and connect BLK w_re from IFM, For medium speed, disconnect
RED wire from IGC terminal BM and connect BLU wire from IFM.
C00058
Fig. 15_208/230-3-60
Wiring Diagram, Units 48GS and 48GX
]7
F,ELO
c I
W45 BLK
BLK
CAP 2
E ,P_QMO
--'///
l
WO BLK
L__
(060ONLY)
%
L3- \
N, / coMP
IFM
wB,YEL
-W64 YEL
--W15YEL
--W14
FAN LOGIC
BRN
W56 BLU
(SEE NOTE #4)
-
COGUNG
YEL
W5 YEL
CAP 1
PRIMARY
BLK
Q
BR
460V
Vl0
r
IDM
G
G
ENERGIZED D_NW_IGIZED
/_,_i
_
I_BRN
HEATING WOI L(3GIC
ENERG_I_t
_GRN
YEk
W46 BRN--
_-ENERGtZED
CR
--W13
1
RH
BLK--
24V SPUCE
BR
--W39 IGC
RED
_]_
Wl 9 WHT
W20 GRN
OFF
-_
_HEAT
II
° _LrrO
_
i
W21 RED
_
II
TCI
",'1
I I
I
--1 I
MGV
II
I!
II
--W35
GRA_
FLt_E SEN
--VEL--O
I
ON
FIELO'THERMOSTAT
I
'-
..........
_
--Wa2BRN--
m
I
I
W33 YEL
COMMON ill
W30 BRN"
LEGEND
AHA
COMPONENT
SECTION FAN
OUTDOOR
ARRANGEMSNT
[]
EQUIF
GND
_,OMPRESN)R rNNXIRFAN
SEC17ON
SECTION
_
_BOLBOX
_
24V
°0
[]
_ASSECTION
DISCONNECT
pERNEC
-
Adjustable Heat
Anticipator
BR
- Blower Relay
C
- Contactor
CAP
- Capacitor
COMPCompressor Motor
CR
- Combustion Relay
CS
- Cen_'ffugaJ Switch
EQUIPEquipment
FS
l Rame Sensor
FU
- Fuse
GND
- Ground
GV
GVR
HS
HV
TRAN
I
IDM
IFC
IFM
IGC
l
-
L1
LS
LS1
MGV
-
l
UNIT
-
Gas Valve
Gas Valve Relay
Hall Effect Sensor
High VoRage
Transformer
Ignitor
Inducod-Draft Motor
ladoor-Fan Contactor
Indoor-Fan Motor
Integrated Gas Unit
Controller
Line
Limit Switch
Limit Switch
MelnGasValve
NEC
-
OFM
QT
RS
SEN
SW
TRAN
-
_
Field Splice
_
Terminal (Marked)
_
---....
--
National Bectdcal
Code
Outdoor-Fan Motor
QuedrupleTerminal
Rollout Switch
Sensor
Switch
Transformer
C)
Terminal (Unmarked)
•
Splice
--
-
--
-
Splice(Marked)
FactoryWidng
Reid Con_rolWiring
Field PowerW_ring
Accessory or
Op5onal Widng
TO Indicate Common
Potential Only, Not
teRepresentW_ring
NOTES:
1. ff any of the original wires furnished ara replaced, they must be
replaced with type 90 degree C wire or Its equivalent
2. See price pages fo_thermostat and subbase_
3.. Use
75 degree
copper
conductors
field
installation.
For high
speed C
IFM,
disconnect
RED for
win_
from
IGC terminal BM
and connect BLK wlre from IFM. For medium speed, disconnect
RED wire from IQC terminal BM and cennect BLU wire from IFM.
C00059
Fig. 16_460-3-60
Wiring Diagram, Units 48GS and 48GX
Table 6_Heating
HEATING
INPUT
(BTUH)*
NUMBER
OF
ORIFICES
40,000
Inputs
GAS SUPPLY PRESSURE
(IN. WG)
Natural
MANIFOLD
PRESSURE
(IN. WG)
Propanel"
Min
Max
Min
Max
2
4.0
13,0
4.0
13.0
60,000
90,000
2
3
4.0
4.0
13.0
13.0
4.0
4.0
13.0
13,0
115,000
3
4.0
13.0
4.0
130,000
3
4.0
13.0
4.0
Natural
3.5
Propane,"
3.5
3.5
3.5
13.0
3.5
3.5
3.4
3.7
13.0
3.5
3.5
• When a unit is converted to propane, different size orifices must be used. See separate, natural4o-propene conversion kit instructions.
f Based on altitudes from sea level to 2000 It above sea level. For altitudes above 2000 It, reduce input rating 4 percent for each additional 1000 It above sea level.
in Canada, from 2000 It above sea level to 4500 It above sea lev_, derato the unit 10 percent.
1. Remove
valve.
cover screw over regulator
2. Turn regulator
adjustment screw
input, or turn regulator adjustment
adjustment
AIRFLOW
screw on gas
clockv4se to increase
screw counterclockwise
AND TEMPERATURE
RISE
The heating section for each size unit is designed and approved for
hearing operation within the temperature-rise
range stamped on the
gas
to
unit rating plate.
decrease input. Manifold pressure must be between 3.4 and
3.6 in. wg. Unsafe operation of the unit may result if manifold
Table 7 shows the approved
temperature
rise range for each
heating input, and the air delivery cfm at various temperature rises.
pressure is outside
may result.
The heating operation airflow must produce
fails within the approved range.
this range. Personal
injury or unit damage
a temperature
Refer to Indoor Airflow and Airflow Adjustrnents
heating
airflow
HEATING
Manifold
The main burner
Pressure
orifices
(Propane
the induced-draft
as follows
to adjust
energized
gas unit are sized for the
pressure
reading
gas input on a propane
matches
the
gas unit:
and connect
manometer
(See
cover screw over regulator
regulator
as
adjustment
specified
clockwise
to increase
screw counterclockwise
6. Replace
screw
in Table
adjustment
ture rise above
screw on gas
to the correct
6. Turn
manifold
adjusting
on (See Table
manometer
from pressure
the maximum
flow to the burners
until LS resets.
screw
When
the thermostat
8 for error codes).
allowable
temperature,
the limit
and pilot. The blower
motor continues
to run
When die air temperature
at the limit switch drops to the
low-temperature
setting of the limit switch, the switch closes and
cover screw.
completes the R control circuit. The electric-spark
ignition
cycles and the unit returns to normal beating operation.
tap.
Replace pipe plug on gas valve, then turn on gas to unit. Check
for leaks.
BURNER
flame is established.
switch opens and the R control circuit "breaks."
Any interruption
in the R control circuit instantly closes the gas valve and stops gas
manifold
pressure, or turn adjusting
to decrease manifold pressure.
7. Turn off gas to unit. Remove
CHECK
the required
Normally closed limit switch (LS) completes the control circuit
through the thermostat R circuit. Should the leaving-air tempera-
Valve.
pressure,
that it has reached
begins. This function is performed by
(IGC). The evaporator-fan
motor is
LIMIT SWITCHES
3. Turn on gas to unit.
5. Adjust
45 sec. afar
LED is continuously
pipe plug on manifold
senses
An LED (light-emitting
diode) indicator is provided on the control
board to monitor operation.
The control board is located by
removing the burner access panel. During normal operation, the
Fig. 13).
4. Remove
motor
is satisfied and "W" is deenergized, the burners stop f-wing and the
evaporator-fan
motor shuts off after a 45-sec. time-off delay.
1. Turn off gas to unit.
2. Remove
OF OPERATION
speed, the burner sequence
the integrated
gas control
Units)
on a propane
unit rated input when the manifold
level specified in Table 6.
Proceed
SEQUENCE
On a call for hearing, terminal "W" of the thermostat is energized,
starting the induced-draft
motor. When die hall-effect sensor on
cover screw cap on gas valve.
4. Turn off gas supply to unit. Remove manometer from pressure
tap and replace pipe plug on gas valve. Turn on gas to unit and
check for leaks.
Measure
section to adjust
when required.
(See Fig. 15-16 and unit wiring label).
may result.
3. Replace
rise that
AUXILIARY
LIMIT
SWITCH
system
(ROLLOUT)
The function of the switch is to close the main gas valve in the
event of flame rollout. The switch is loca_d above die main
FLAME
With burner access panel removed,
observe the unit heating
operation. Watch the burner flames to see if they are light blue and
soR in appearance, and that the flames are approximately
the same
burners. When the temperature
at the auxiliary switch reaches the
maximum
allowable
temperature,
the R control circuit trips,
closing the gas valve and stopping gas flow to the burners. The
indoor (evaporator)
fan motor (IFM) and induced draft motor
for each burner. Propane will have blue flame with yellow tips
(See Fig. 14). Refer to the Maintenance section for information on
burner removal.
continue to man until
FAULT CODE 7.
19
switch is reset. The IGC LED will display
Table 7--Air Delivery (Cfm) at Indicated Temperature Rise and Rated Heating Input
HEATING
INPUT
(BTUH)
20
25
30
35
40
45
50
55
60
65
70
40,000
1500
1200
1000
857
750
667
600
545
500
--
--
60,000
2250
1800
1500
1286
1125
1000
900
818
750
692
--
90,000
--
--
2250
1929
1688
1500
1350
1227
1125
1038
964
115,000
--
--
--
2464
2156
1917
1725
1568
1438
1327
1232
--
--
--
2786
2438
2167
1950
1773
1625
1506
--
TEMPERATURE
130,000
RISE °F
NOTE: Dashed areas do not fall within the approved temperature _se range of the unit.
Table 8--LED Indications
ERROR CODE
LED INDICATION
Normal Operation
Hardware Failure
On
Off
IMPORTANT:
(48GS048
and
Three-phase,
48GX030-060)
These units must be checked
Fan On/Off Delay Modified
Limit Switch Fault
1 Flash
2 Flashes
Flame Sense Fault
Four Consecutive Limit Switch Faults
3 Flashes
4 Flashes
Ignition Lockout Fault
Induced-Draft Motor Fault
Rollout Switch Fault
5 Flashes
6 Flashes
7 Flashes
Internal Control Fault
8 Flashes
Temporary lock-out (1 hr)
9 Flashes
compressor
suction and discharge
matically lower than normal.
CHECKING
AND ADJUSTING
NOTE:
Adjustment
of the
with
refrigerant
CHARGE
R-22
charge
refrigerant,
is not
required
of not having the proper R-22 charge.
A superheat charging chart is attached to the outside of the service
access panel. The chart includes the required suction line tempera-
MAKE ADJUST-
Ir!_ [,,,Y±'Ti]id
[,,] _'I
procedures
the unit.
may be dra-
REFRIGERANT
ture at given suction line pressures
tures.
Complete the required
section before starting
pressures
The refrigerant
system is fully charged
tested, and factory-sealed.
unless the unit is suspected
AND
compressor
If not corrected within 5
shuts off the compressor.
The 3-phase power leads to the unit must be reversed to
correct rotation. When turning backwards, _roll compressors emit elevated noise levels, and the difference between
1. There is a 3-sec. pause between error code displays.
2. If more than one error code exists, all applicable error codes will be
displayed in numerical sequence
3. This chart is on the wiring diagram located inside the burner access panel,
COOLING
compressor
units
direction-oriented.
to ensure proper
3-phase power lead orientation.
minutes, the internal protector
NOTES:
Step 3--START-UP
MENTS
scroll
are
and outdoor
ambient tempera-
An accurate superheat, thermocoupleor thermistor-type
thermometer, a sling psychrometer,
and a gauge manifold are required
given in the Pre-Start-Up
when using the superheat charging method for evaluating the unit
charge. Do not use mercury or small dial-type thermometers
Do not jumper any safety devices when operating the unit.
Do not operate the compressor when the outdoor temperature
beca_ve
they are not adequate
for this _pe of measurernent.
is below 40OF (unless accessory low-ambient kit is installed).
Do not rapid-cycle the compressor. Allow 5 minutes between
"on"
cycles
CHECKING
to prevent
COOLING
Start and check
follows:
compressor
CONTROL
the unit for proper
damage.
When evaluating
cooling
control operation
as
I. Place room thermostat
SYSTEM
switch in OFF position.
Observe that blower motor starts when FAN switch is placed
Proceed
2. Using
4. Measure
room
temperature)
valve
and record
a. Outdoor
3. When using an auto-changeover
room thermostat,
place both
SYSTEM and FAN switches in AUTO. positions. Observe
that unit operates in Heating mode when temperature control
(above
with
3. Start unit in Cooling
pressures stabilize.
blower motors start. Observe that cooling cycle shuts down
when control setting is satisfied.
The evaporator
fan will
continue to run for 30 see.
for heating"
an indicated
caps from low- and high-pressure
hoses
high-pressure
gauge hoses
fittings, respectively.
2. Place SYSTEM switch in COOL position and FAN switch in
AUTO. position. Set cooling control below room temperature.
Observe
that compressor,
condenser
fan, and evaporator
operates in Cooling mode when temperature
control
"call for cooling" (below room temperature).
charge,
adjust-
as follows:
1. Remove
in ON position and shuts down when FAN switch is placed in
AUTO. position.
is set to "call
the refrigerant
ment to the specified factory charge must always be very
minimal. If a substantial adjustment is indicated, an abnormal
condition exists somewhere in the cooling system, such as
insufficient airflow across either coil or both coiLs.
OPERATION
c. Suction-tube
d. Suction
and
is set to
and let unit
ran
fittings.
low-
and
service
until system
the following:
iniet-air
temperature
(°F db).
temperature
(°F wb).
temperature
(low-side)
attach
to low- and high-pressure
mode
ambient-air
b. Evaporator
service
core depressors,
(°F) at low-side
pressure
service
fitting.
(psig).
5. Using "Conling Charging Charts," compare outdoor-air
temperature (°F db) with the suction line pressure
(psig) to
20
determine
desired
system
operating
suction
linetemperature
(See
Fig.17-26).
6.Compare
actualsuction-tube
temperature
with desired
suction-tube
temperature.
Usinga tolerance
of -+3°F,add
refrigerant
if actual
temperature
ismore
than 3°F higher than
proper
suction-tube
temperature,
actual temperature
is more
suction-tabe
temperature.
than
or remove
refrigerant
3°F lower
than required
NOTE: If the problem
causing
the inaccurate
refrigerant leak, refer to the Check for Refrigerant
INDOOR
AIRFLOW
AND AIRFLOW
Table 10-Color Coding for 460-V GE Motor Leads
3-SPEED
2-SPEED
black = high speed
black = high speed
violet = jumper
blue = jumper
orange = medium speed
if
red = low speed
readings is a
Leaks section.
red = low speed
chassis parts. To select high speed on 460-v GE motors, separate
ADJUSTMENTS
the black (female quick connect - QC - from the jumper lead
(male quick connect - QC) and connect the black lead to the BR.
lr_*ulate the jumper
COOLING
to avoid contact
SEQUENCE
with any chassis parts.
OF OPERATION
With the room thermostat
SYSTEM
switch in the COOL position
and the FAN switch in the AUTO position,
of operation is as follows:
Table 7 shows the temperature rise at various airflow rates. Tables
11 and 13 show both heating and cooling airflows at various
external static pressures. Refer to these tables to determine the
airflow
for the system
wet coil pressure
NOTE:
being installed
(See Tables
l. When
Be sure that all supply-
and return-air
and adjusted
14 and 15 for
grilles
R to terminals
thermostat:
2. The normally
or explosion
Airflow can be changed
blower motor.
Unit
48GS
two-
can cause
by changing
or three-speed
factory wired for low speed
wired for medium speed.
All 48GX units are factory
be wired for medium
serious
injury
the lead connections
motors
operation.
(except
size
Unit 48GS030
NOTE:
of the
Table
on the 208/230V
Coding
9-Color
030)
in the field.
motor leads, see Table
9.
Motor
black = high speed
of the blower
motor
(BM), remove
relay
the fan
evaporator
has started
relay BM close
blower
(indoor)
it
and then stopped,
again until 5 minutes
have elapsed.
The
terminal
R to terminals
Y and G. These open
GE motor leads, see Table
the speed of the blower motor (BM), remove
be
performed
on
this
equipment.
Tiffs
combination
local
dealer
about
the availability
of a
The ability to properly perform maintenance
on this equipment requires certain expertise, mechanical skills, tools, and
GE Motors
on the 460-v
thermostat
NOTE: Consult your
maintenance
contract.
(BR). This wire is
attached to terminal BM of the integrated gas control (IGC) beard
for 3-phase units. To change the speed, remove and replace with
lead for desired blower motor speed. Insulate the removed lead to
avoid contact with chassis parts.
To change
not be started
of energized
heating/cooling
unit should be inspected at least once each year by
a qualified service person. To troubleshoot cooling or heating of
units, refer to Tables 16-18.
red - low speed
leg lead from the blower
For color coding
through
To ensure continuing
high performance
and to minimize
the
possibility of premature equipment
failure, periodic maintenance
must
red = low speed
For 460-V
open contacts
Leads
black = high speed
the speed
(C) close
MAINTENANCE
for 208/230-V
2-SPEED
speed
of energized
the circuit through compressor
motor (COMP)
(outdoor) fan motor (OFM). Both motors start
circuits deenergize contactor coil C. The condenser and compressor motors stop. After a 30-sec. delay, the blower motor stops. The
uhit is in a "standby"
condition, waiting for the next "call for
cooling" from the room thermostat.
blue = medium speed
motor
contactor
the
cooling cycle remains "on" until the room temperature drops to a
point that is sfightly below the cooling control setting of the room
thermostat.
At this point, the thermostat
"breaks"
the circuit
are
is factory
3-SPEED
To change
open contacts
Once the compressor
should
For 208/230V
For color coding
circuits through
and complete the circuit
fan motor (IFM).
for low speed and may need to
or high speed
Y and G. These completed
3. The set of normally
or
between
wired
that is slightly
instantly.
Before changing blower speed, shut off gas supply. Then
disconnect electrical power to the unit and install lockout tag.
shock
rkses to a point
are open,
properly.
and complete
to condenser
Electrical
death.
temperature
sequence
above the cooling control setting of the thermostat,
the
thermostat completes the circuit between thermostat terminal
drop).
free from obstructions,
the room
the cooling
10.
equipment.
If you do not possess these, do not attempt to
perform any maintenance on this equipment other than those
fan motor
procedures
TO HEED
speed lead from the blower relay (BR) and replace with the lead
for the desired blower motor speed. The motor speed lead is
OUS
attached to terminal BM of the integrated gas control (IGC) board.
For low and medium speeds, black must be connected to the
jumper wire. Insulate removed lead end to avoid contact with
recommended
in the User's Manual. FAILURE
THIS WARNING
COULD RESULT IN SERI-
INJURY
EQUIPMENT.
21
AND
POSSIBLE
DAMAGE
TO
THIS
Table 11--Dry Coil Air Delivery* - Horizontal Downflow Discharge Unit 48GS030-060 (Deduct 10 percent for 208 Volts)
230 AND 460 VOLT
Unit
M_or
Speed
0,O
0.1
0,2
0.3
E_ernalSt_ic
0,4
P_ssure (in. wg)
0.5
0,6
WaHs
260
275
270
267
0.7
0.8
0.9
264
252
260
--
--
--
Cfm
WaHs
950
380
880
375
825
365
750
360
670
355
580
350
400
344
....
335
Cfm
1220
1150
312
--
--
1090
1025
970
860
760
620
450
--
WaRs
Cfm
485
1475
--
475
1440
470
1350
460
1275
455
1200
445
1125
437
1025
430
925
415
750
385
400
---
Low
WaUs
Cfm
576
1430
566
1403
556
1365
538
1263
512
1157
497
1068
481
973
466
900
450
827
435
704
---
Med
Watts
Cfm
680
1720
671
1630
660
1538
624
1439
604
1346
620
1267
602
1167
558
1126
534
1018
512
958
496
781
Watts
Cfm
810
1800
800
1745
790
1660
762
1600
766
1547
742
1465
723
1360
709
1276
688
1163
661
967
627
876
Low
Wa6s
Cfm
---
675
1454
660
1387
650
1326
640
1275
630
1204
620
1142
610
1061
595
995
580
918
---
Med
WaRs
--
866
655
825
795
778
765
750
735
718
700
Cfm
--
1515
1458
1406
1350
1285
1224
1163
1091
1013
932
WaRs
Cfm
---
---
---
1000
1551
950
1488
925
1424
910
1360
890
1296
875
1233
855
1146
833
1071
WaRs
cfm
--
727
1678
712
1639
700
1600
688
1561
666
1500
644
1440
622
1379
595
1289
569
1198
--
wars
-
853
836
621
807
762
756
730
699
667
640
Cfm
--
1914
1870
1825
1780
1711
1642
1573
1470
1367
1270
High
WaRs
Cfm
---
979
2150
959
2100
943
2050
927
2000
697
1922
868
1845
838
1767
802
1600
766
1535
736
1419
Low
Watts
Cfrn
1033
2105
949
2057
864
2009
836
1943
822
1909
608
1876
772
1823
737
1770
705
1698
674
1627
642
1531
Med
WaRs
1084
1054
1024
994
971
055
928
997
867
635
803
CfTn
Watts
2318
--
2248
--
2179
1184
2110
1152
2058
1120
2000
1102
1932
1084
1885
1056
1829
1029
1740
997
1638
965
Cfm
--
--
2349
2278
2207
2124
2041
2000
1960
1853
1745
Low
030
Med
High
036
High
042
High
Low
048
060
Med
High
* Air delivery values are without air filter and are for dry coil (See Table 14_8GS
NOTE: Deduct field-supplied
1.0
Wet Coil Pressure Drop).
air filter pressure drop and wet coil pressure drop to obtain exlemal static pressure available for ducting.
Table 12--Filter Pressure Drop (In. wg)
UNITSIZE
RLTER SIZE
030
20 X 20 X 1
036
20 X 24 X 1
042, 648, 060
24 X 30 X 1
CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 22(;0 2300
0,05 0.07 0.08 0,10 0.12 0.13 0,14 0.15
.......
0.09
0.10
0,11
0.13
0.14
0.15
0.16
0.07
0.08
0.09
0.10
Failure to follow these warnings could result in serious injury:
I. FirsL turn off gas supply to the unit. Then turn off electrical
power to the unit and install lockout tag before performing
any maintenance
or service on the unit.
2. Use extreme
caution when removing
panels
0.11
0.12
0,13
0.14
0.15
0.16
0,17
0,18
tion when servicing.
and parts. As
The minimum
follows:
with any mechanical equipment, personal injury can result
from sharp edges, etc.
3. Never place anything combustible
either on, or in contact
with, the unit.
1. Inspect
maintenance
air
filter(s)
requirements
each
month.
necessary. Certain geographical
frequent inspections.
4. Should overheating occur or the gas supply fail to shut off,
turn off external main manual gas valve to the unit. Then
shut off electrical supply and install lockout tag.
2. Inspect indoor
for this equipment
are as
Clean
or replace
when
may require
more
locations
coil, outdoor coil, drain pan, and condensate
drain each cooling season for cleanliness. Clean at least once
per healing / cooling season or more often if needed.
22
Table 13--Dry Coil Air Delivery* - Horizontal and Downflow Discharge Unit 48GX030-060 (Deduct 10 percent for 208 Volts)
230 AND
Unit
Motor
Speed
WaRs
0,0
246
0.1
244
0.2
243
6.3
241
466 VOLT
E_ernal Static Pressure
0.4
0.8
.......
(in. wg)
0.6
0,7
....
0.8
0,9
1.0
Low
030
Med
High
Low
036
Med
High
Low
042
Med
High
Low
048
Med
High
LOW
060
Med
High
Cfm
982
860
808
736
WaRs
343
339
336
332
328
.......
322
317
Cfm
1233
1179
1109
1038
953
855
754
....
WaRs
....
441
432
421
410
400
--
--
Cfm
....
1202
1111
1021
929
826
--
--
WaRs
--
470
458
445
430
415
399
384
--
--
--
Cfrn
--
1463
1406
1344
1273
1186
1091
983
--
--
--
WaRs
--
--
614
501
487
471
455
438
422
--
--
Cfm
--
--
1497
1428
1348
1255
1152
1042
929
--
--
WaRs
Cfm
---
---
---
646
1491
636
1412
626
1325
614
1228
662
1120
589
1003
---
---
WaRs
Cfm
643
1626
625
1614
614
1579
605
1532
593
1478
574
1421
549
1361
518
1295
486
1218
454
1120
---
WaRs
....
726
695
661
625
591
561
540
Cfm
....
1731
1672
1610
1541
1456
1345
1193
WaRs
.......
790
766
742
713
Cfm
.......
1699
1602
1494
1367
--
WaRs
614
588
577
572
566
556
539
517
491
--
Cfm
1591
1549
1518
1490
1460
1421
1372
1312
1242
--
--
WaRs
778
756
738
719
699
676
650
623
596
572
555
Cfm
1854
1837
1804
1759
1705
1643
1577
1508
1440
1375
1315
WaRs
Cfm
....
....
896
1956
862
1879
829
1797
800
1709
775
1615
752
1514
728
1406
WaRs
834
813
782
746
712
680
652
626
--
--
--
Cfm
2016
1955
1898
1840
1781
1717
1646
1566
--
--
--
WaRs
941
889
851
822
797
772
745
714
679
639
--
Cfm
2379
2233
2124
2038
1964
1892
1814
1727
1626
1511
--
WaRs
--
--
960
949
920
863
845
812
783
753
--
Cfm
--
--
2497
2224
2076
1986
1915
1831
1721
1588
--
* Air delivery values are without air filter and are for dry coil (See Table 15-48GX Wet Coil Pressure Drop table),
NOTE: Deduct field-supplied
air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting.
751
I1C
lOO
90-
BO
1
70
i
i
50
'50 -
40
40
50
SUCT]ON LINE
I
4
1I0
50
70
TEMPERATURE ('F)
116
80
30
90
217
5UC7_0 _, LINE T£HpERATURE ('C)
40
5'0
50
SUCTION LINE TEHPERATURE(-F]
I
I
4
i_O
16
SUCTION LINE TEMPERATURE(.C]
C00043
Fig. 17--Cooling
Charging Chart, 48GS030 Units
Fig. 18--Cooling Charging Chart, 48GS036 U_
23
e44
÷_
75_
110
68=
100-
_v
i
i
I
i
i
i
=
i
i
!
i
_'
105
41
95
:t5
65
18
.
m
_
LU
__
_
o70
_
.TI
_
J_'_
_"_'
i,
L,,,,_
!i' .-
_7_ ,o11
30
40
50
I
60
70
80
90
I
27
I
32
SUCTION
UNETEMPERATURE
I°Fq
I
-1
Fig.19---Cooling
ChargingChad,48GS042
U_
°4s
I
4
SUCTION
I
I
=
10
16
21
LINE TEMPERATURE (°C)
Fig. 20--Cooling Charging Chart,
48GS048
Unl_ls°47
Ililll
689
o
i
100-
_
q_l _8o_£1
I I r-
I _
,==,,_._-
.._, , I I
!111 I_-'_
!
45
73
i#)
_LU
Z
0
;
i
40-
I
ii'_
- i
i
'1
2o713o
3O
40
50
60
70
SUCTION UNE TEMPERATURE I_F)
1
1
I
motor and wheel for cleanliness
I
4
10
16
21
SUCTION LINE TEMPERATURE (°C)
Fig. 21--Cooling
3. Inspect blower
I
80
gO
I
I
27
32
Charging Chart, 48GS060 U_
m
AIR FILTER
at the begin-
ning of each heating and cooling season. Clean when necessary. For first heating and cooling sem_on, inspect blower
wheel hi-monthly to determine proper cleaning frequency.
4. Check electrical
proper operation
when necessary.
connections
each
heating
for dghtness
and controls for
and cooling
season.
Service
tubes
or sharp
Inspect
air filter(s)
at least once each
(throwaway-type)
or clean (cleanable-type)
month and replace
at least twice during
6. Check and inspect heating section before each heating season.
Clean and adjust when necessary.
each heating and cooling season or whenever
clogged with dust and/or lint.
the f-alter(s) becomes
5. Ensure wires are not contacting
sheet metal edges.
7. Check
flue hood
and remove
refrigerant
any obstructions,
EVAPORATOR
if necessary.
NOTE:
lubricate
24
BLOWER
AND MOTOR
All motors are permanently
these motors.
lubricated.
Do not attempt to
(0301 60HZ CHARGING CHART
(036) 60HZ CHARGING CHART
r_
_J_
46
41
35
15
_5
95
29
24
18
13
B5
7
75
85
55
45
I
2761
40
L
i
_71 30
40
50
60
SUCTION LINETEMPERATURE
_1
4
10
16
SUCTION LINETEMPERATURE
Fig. 22--Cooling
27
32
4o
so
6o
_o
8o
sucnoNLI_E
TEMPERATUREII°_
21
-1
°-
4
10
16
21
SUCTION LINE TEMPERA31JRE (°C)
(_C)
CHART
0_
_F
27
I
32
Fig. 23---Cooling Charging Chart, 48GX036 U_
]_=
,C
°51
(048) 60HZ CHARGING CHART
68_
90-
100
i _62I
90-
,
551 _
g
90
100
<_'62C
_
8_0
(_F}
Charging Chart, 48GX030 Un_l_°46
(042) 60HZ CHARGING
68E
70
q 551
_6o !
o3
_o
uJ
ku
_48E
_7o
70
cu
_
_41, o
="6o !i
-
_u
z
_ 41"
o_z6o
_
z
L_
O
_so!
27[
ku
_
_ a4_
40
271
4O
2O;
3O
30
I
I
-1
4
10
SUCTION
Fig. 24---Cooling
16
LINE TEMPERATURE
21
27
I
-1
312 I
("C)
I
C00052
Fig. 25--Cooling
Charging Chart, 48GX042 Units
For longer life, operating economy, and continuing
clean accumulated
dirt and grease from the blower
motor annually.
efficiency,
wheel and
40
SIUCTION
50
60
LINE TEMPE
70
P,ATU RE I(°F)
4
t0
16
SUCTION UNETEMPERATURE
21
I°C)
80
90
I
27
'
32
Charging Chart, 48GX048 Units
°°53
c. On all units, remove blower assembly from unit. Remove
screws securing
blower to blower partition
and slide
assembly out. Be careful not to tear insulation in blower
compartment.
Before cleaning
the blower
motor and wheel, disconnect
d. Ensure proper reassembly
by marking blower wheel and
motor in relation to blower housing before disassembly.
gas
supply. Then turn off and tag electrical power to the unit.
Failure to adhere to this warning could cause serious injury or
death.
Cleaning
the Blower
1. Remove
housing,
Remove
Motor and Wheel
and disassemble
a. Remove
e. Loosen
Remove
unit access
blower assembly
a. Ensure
as follows:
panel.
setscrew(s)
that secures wheel to motor shall
screws that secure motor mount brackets
to
and slide motor and motor mount
and clean blower
proper reassembly
out of housing.
wheel as follows:
by marking
wheel orientation.
b. Lift wheel from housing. When handling and/or cleaning
blower wheel, be sure not to disturb balance weights (clips)
on blower wheel vanes.
b. Disconnect
motor lead from blower relay (BM). Disconnect yellow lead from temainal L2 of the contactor.
25
Table 14_8GS
INDUCED DRAFT MOTOR MOUNT
Wet Coil Pressure Drop
UNIT SIZE
48GS
AIRFLOW
(CFM)
PRESSURE DROP
(IN. WG)
030
900
1000
0.065
0.080
1100
0.097
1100
0.084
1200
1300
0.100
0.177
1300
0.103
1400
0.120
1500
1500
0.138
0.088
1600
0.100
1700
1900
0.113
0.108
2000
0.120
2100
0.132
036
042
048
060
ROLLOUT
SWITCH
COLLECTOR
BOX
BLOWER
HOUSING
BURNER
RACK
MOUNTING
SCREW
C99022
Fig. 27--Blower Housing and Flue Collector Box
Table 1,5_48GX Wet Coil Pressure Drop
UNIT SIZE
48GX
AIRFLOW
(CFM)
900
PRESSURE DROP
(IN. WG)
0.0687
030
1000
0.083
1100
0.150
1100
1200
0.084
0.100
1300
0,177
1300
1400
0.099
0.177
1500
0.204
1500
1600
0.199
0.137
1700
0,156
1900
0.108
2000
0,120
2100
0.132
036
042
048
060
(060) 60HZ CHARGING
CHART
=
_620
904
_ I
;
_,_
_RT
F
I
==_o_
"
L,
L_ '2,
I
_
Fig. 28_Unit
85
_1
c. Remove caked-on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations
from wheel
75
IV
and housing with vacuum cleaner, using soft brash attachment. Remove grease and oil with mild solvent.
45
d. Reassemble
'k
e. Reassemble
z60d
tightened
shaft.
f. Reinstall
I'
v
30
3. Restore
40
SU_TION
50
60
70
LIN E TEMPERATURE I°Ft
I
I
I
4
10
16
21
SUCTION UNE TEMPERATURE (_C)
wheel into housing.
motor
on motor
80
90
I
27
32
into housing.
Be sure
setscrews
shaft fiats and not on round part
are
of
unit access panel
electrical
power
proper blower rotation
cooling cycles.
_
I
Fig. 2_Cooling
Access Panel
, i -"
"i.
_41_
C99091
105
_,_
,F
FRONT
ACCESS PANEL
to unit.
and motor
Start
unit and check
for
speeds
during heating
and
FLUE GAS PASSAGEWAYS
To inspect
exchanger:
the flue collector
box
and upper
areas
of the heat
1. Remove the combustion
blower wheel and motor assembly
according to directions in the Combustion-Air
Blower section.
Charging Chart, 48GX060 Units
26
1. Remove
unit access
2. Remove
the 7 screws that attach induced-draft
panel (See Fig. 28).
ing plate to blower housing
HOUSING
motor mount-
(See Fig. 29).
3. Slide the motor and blower wheel a._sembly out of the blower
housing (See Fig. 29). Clean the blower wheel. If additional
cleaning
is required,
4. To remove
blower,
continue
remove
with Steps 4 and 5.
2 setscrews.
5. To remove motor and cooling fan assembly, remove
that hold blower housing to mounting plate.
6. To reinstall,
LIMIT
2 SETSCREWS
(HIDDEN)
reverse
the procedure
outlined
4 screws
above.
SWITCH
Remove unit access panel.
partition.
BURNER
Limit switch is located on the blower
IGNITION
Unit is equipped
system. Ignition
with a direct spark ignition 100 percent lockout
module is located in die control box. Module
contains
a self-diagnostic
diagram
for LED interpretation.
LED.
During
servicing,
refer to label
If lockout occurs, unit may be reset by either momentarily
interrupting power supply to unit or by turning selector switch to
OFF position at die thermostat.
C99085
Fig. 29---Removal of Motor and Blower Wheel
MAIN BURNERS
At the beginning of each heating season, irtspect for deterioration
or blockage due to corrosion or other causes. Observe the main
burner
flames
Removal
and adjust, if necessary.
of Gas Train
To remove
die gas train for servicing:
1. Shut off main gas valve.
2. Shut off power to unit and install lockout
3. Remove
unit access
4. Disconnect
tag.
panel (See Fig. 28).
gas piping at unit gas valve.
5. Remove
wires connected
6. Remove
ignitor and sensor wires at the ignitor
to gas valve.
Mark each wire.
7. Remove the mounting screw that attaches
the unit base (See Fig. 27).
module.
the burner rack to
8. Slide die burner rack out of the unit (See Fig. 27 and 30).
9. To reinstall,
CONDENSER
CONDENSATE
C99086
Fig. 30_Burner
Rack Removed
2. Remove
collector
the 3 screws holding die blower housing
box cover (See Fig. 27-30).
3. Remove
the 12 screws
(See Fig. 29-30)
beat exchangers.
4. Clean all surfaces,
COMBUSTION-AIR
holding
the flue collector
to die heat exchanger
as required,
assembly.
Inspect
reverse
die procedure
COIL, EVAPORATOR
DRAIN PAN
the condenser
coil, evaporator
outlined
above.
COIL, AND
coil, and condensate
drain
pan at least once each year or more often if necessary.
to die flue
The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions,
including weeds and shrubs, that interfere with die
airflow through the condenser coil.
box cover
Inspect the
Straighten
using a wire brush.
bent fins with a fin comb. If coated
with dirt or lint,
clean the coils with a vacuum cleaner, using die so_ brush
attachment. Be careful not to bend die fins. If coated with oil or
BLOWER
Clean periodically to assure proper airflow and heating efficiency.
Inspect blower wheel every fall and periodicaily during the heating
bi-
grease, clean the coils with a mild detergent-and-water
solution.
Rinse coils with clear water, using a garden bose. Re careful not to
splash water on motors, insulation, wiring, or air l-alter(s). For best
results, spray condenser coil fins from inside to outside die unit.
To inspect blower wheel, remove draft hood assembly. Shine a
flashlight into opening to inspect wheel. If cleaning is required,
remove motor and wheel as follows:
On units with an outer and inner condenser coil, be sure to clean
between the coils. Be sure to flush ail dirt and debris from the unit
base.
season. For the first heating sea.son, inspect blower
monthly to determine proper cleaning frequency.
wheel
27
Inspect
thedrainpanandcondensate
drain
linewhen
inspecting
thecoils.
Clean
thedrain
panand
condensate
drain
byremoving
all
foreign
matter
fromthepan.
Flush
thepananddraintubewith
clear
water.
Donotsplash
water
ontheinsulation,
motor,
wiring,
or airfilter(s).
If thedraintubeis restricted,
clearit witha
"plumbers
snake"
orsimilar
probe
device.
Ensure
thattheauxiliary
drain
portabove
thedrain
tubeisalso
clear
CONDENSER
NOTE:
Refer to the heating and/or cooling sequence
in this
publication
6 screws holding
3. Inspect the fan blades
condenser
5. When replacing
fan blade,
away from the motor
visible. See Fig. 12).
6. ErL_ure that setscrew
when tightening.
upside
for cracks
4. If fan needs to be removed,
fan off the motor shaft.
grille
and motor to top
down
on top
cover
to
loosen the setscrew
control
_GERANT
Annually
CIRCUIT
inspect
all refrigerant
base for oil accumulations.
refrigerant leak.
tubing
Detecting
connections
and the unit
oil generally
indicates
a
panel
position
engages
and slide the
shaft
will be
EVAPORATOR
the flat area on the motor shaft
inspecting
to locate
all the electrical
connections
controls
all
or burned connections
clean all the parts, restrip
are
the
controls
for tightness.
properly
system
LIQUID
replace
checking
exists, be
--
ACUTROL
DEVICE
LINE
STRAINER
(to protect metering
device) is made of wire
mesh and located ha the liquid line on the inlet side of the metering
device.
the
TROUBLESHOOTING
Use the Troubleshooting
occur with these units.
operation. If discrepancies
are observed in either or both operating
cycles, or if a suspected malfunction
has occurred, check each
electrical component
with the proper electrical instrumentation.
label when making
DEVICE
The liquid line strainer
and securely.
and wiring,
airflow does not require
is suspected- lfa problem
This metering device is a fixed orifice and is located in the header
to the evaporator coil.
Start the unit, and observe at least one complete
and one complete cooling cycle to ensure proper
Refer to the unit wiring
AIRFLOW
airflow.
METERING
and
Tighten
the connection
the electrical
is suspected,
sure that all supply- and return-air grilles are open and free from
obstructiomr, and that the air filter is clearL When necessary, refer
to the Indoor Airflow andAirflow Adjustments section to check the
AND WIRING
If any smoky
the connection,
wire end and reassemble
performance
The gas input does not require checking unless improper heating
performance is suspected. If a problem exists, refer to the Start-Up
section.
blade so the hub is 1/8 in.
ha. of motor
The heating and/or cooling
unless improper performance
all electrical
screw connections.
noticed, disassemble
or if low cooling
GAS INPUT
end (l/8
CONTROLS
access
wiring. Check
access panel.
heating cycle
of operation
proper
If no refrigerant leaks are found and low cooling performance
is
suspected, refer to the Checking and Adjusting Refrigerant Charge
section.
or bends.
Irmpect and check the electrical controls and wiring annually. Be
sure to turn off the gas supply, and then the electrical power to the
uniL
After
determining
leak-test all refrigerant tubing using an electronic leak-detector,
halide torch, or liquid-soap
solution.
If a refrigerant
leak is
detected, refer to the Check for Refrigerant Leaks section.
grille.
ELECTRICAL
Remove
in
FAN
2. Turn motor/grille
a_s_mbly
expose the fan blade.
7. Replace
an aid
operation
If oil is detected
l. Remove
cover.
as
Use the Start-Up
followed.
these checkouts.
28
Guides
(See Tables
16-18)
if problems
START-UP
CHECKLIST
Checklist to ensure proper start-up procedures
are
Table 16_Troubleshooting
SYMPTOM
Compressor and condenser
will not start.
fan
Compressor will not
start but condenser
fan runs,
Three-phase
scroll compressor
(48GS048
and 48GX030-060
only)
makes excessive
be a low pressure
noise,
and
dilferentiat.
Guide_Cooling
CAUSE
there
may
REMEDY
Power Failure
Call power company.
Fuse blown or circuit breaker tdppad
Replace fuse or reset cimuit breaker.
Defective thermostat, contactor, transformer, or control relay
Replace component.
Insufficient line voltage
Determine cause and correct.
Incorrect or faulty widng
Check widng diagram and rewire correctly.
Thermostat setting too high
Lower thermostat setting below room temperature.
Faulty widng or loose connections in compressor circuit
Check wiring and repair or replace.
Compressor motor burned out, seized, or internal
ovedoad open
Determine cause
Replace compressor.
Defective run/start capacitor, overload, start relay
Determine cause and replace.
One leg of 3-phase power dead
Replace fuse or reset circuit breaker.
Determine cause.
Scroll compressor is rotsting in the wrong direction
Correct the direction of rotation by reversing the
3-phase power leads to the unit. Shut down unit
to allow pressures to equat_ze.
Refrigerant overcharge or undercharge
Recover refrigerant, evacuate system, and recharge to
capacities shown on nameplate.
Defective compressor
Compressor cycles (other than
normally satisfying thermostat).
Compressor
Excessive
operates oonUnuously,
head
pressure.
Head pressure too low.
Excessive suction
pressure.
Replace and determine cause.
Determine cause and correct.
insufficient line voltage
Blocked condenser
Determine cause and correct.
Defective _n/start capacitor, ovedoad or start relay
Defective thermostat
Determine cause and replace.
Faulty condenser-fan
Restriction in refitgerant system
Replace.
Locate restriction and remove.
Dirty air filter
Unit undersized for load
Replace filter.
Decrease load or increase unit size.
Thermostat set too low
Reset thermostat.
Low refrigerant charge
Locate leak, repair, and recharge.
Leaking valves in compressor
Replace compressor.
Air in system
Condenser coil dirty or restricted
Recover refrigerant, evacuate system, and recharge.
Clean coil or remove restdction.
Dirty air filter
Replace filter.
Dirty condenser COil
Clean coil.
Refrigerant overcharged
Recover excess refrigerant.
Air in system
Condenser air restricted or air short_ysiing
Recover refdgerant, evacuate system, and recharge.
Determine cause and correct.
Low refrigerant charge
Check for leaks, repair, and recharge.
Compressor valves leaking
Replace compressor.
Restriction in liquid tube
Remove restriction.
High heat load
Check for source and eliminate.
Compressor valves leaking
Replace compressor.
Refrigerant overcharged
Recover excess refrigerant.
Dirty air filter
Replace Filter.
Low refitgerant charge
Check for leaks, repair, and recharge.
Remove source of restdction.
motor or capacitor
Mefedng device or low side restdcted
Suction pressure too low.
Insufficient evaporator airflow
Temperature too low in conditioned area
Outdoor ambient below 40°F
Fistd-instailed filter-alder restricted
Replace thermostat.
Increase air quantity. Check filter -- replace if necessary.
Reset thermostat.
install low-ambient kit.
Replace.
29
Table 17--Troubleshooting
SYMPTOM
REMEDY
Water in gas line
Drain. Install drip htg.
No power to f_mace
Check power supply fuses, widng, or circuit breaker,
Check transformer,
NOTE: Some transformers have internal overcurrerd
protection that requires a ccol_lown period to reset.
No 24-v power supply to control circuit
Burners
will not ignite,
inadequate
Guide-Heating
CAUSE
heaUng.
Poor flame characteristics.
Miswirod or loose connections
Check all widng and wirenut connections
Burned-out heat anticipator in
thermostat
Replace thermostat.
Broken thermostat wire
Run continuity check, Replace wire if necessary.
Mlaaligned spark electrodes
Check flame ignition and sense electrode positioning.
Adjust as necessary.
No gas at main burners
1 .Check gas line for air. Purge as necessary.
NOTE: After purging gas line of air, wait at least 5 minutes for any
gas to dissipate before attempting to light unit.
2. Check gas valve.
Dirty air filter
Clean or replace filter as necessary.
Gas input to fumace too low
Check gas pressure at manifold match with that on
unit nameplate.
Unit undersized for application
Replace with proper unit or add additional unit.
Restricted airflow
Clean or replace rifler. Remove any restriction.
Blower speed too low
Use faster speed tap if available, or install aflemate
motor.
Limit switch cycles main burners
Check rotation of blower, thermostat heat anticipator settings,
temperature rise of unit. Adjust as necessary.
Incomplete combustion results in:
Aldehyde odors, carbon monoxide, sooting
flame, floating flame
1 .Tighten all screws around burner compartment.
2. Cracked heat exchanger. Replace.
3. Unit oven3red. Reduce input (change orifices or
adjust gas line or manifold pressure).
4. Check burner alignment,
Table 18---Troubleshooting Guide-LED Error Codes
SYMPTOM
CAUSE
REMEDY
Check 5-amp fuse on IGC*, power to unit, 24-v circuit breaker, and
Hardware failure,
(LED OFF)
Loss of power to control module (IGC)'.
transformer. Units without a 24-v circuit breaker have an internal
overload in the 24-v transformer. If the ovedoad tdps, ariow 10 minutes
for automatic reset.
High limit switch opens during heat
Fan ON/OFF delay modified
{LED/FLASH)
exchanger
warm-up period before fan-on
delay expires.
Limit switch opens within three minutes
after blower_ff delay timing in Heating mode.
Ensure unit is fired on rate; ensure temperature rise is correct.
Ensure unWs exfamai static pressure is within application guidelines.
Draft switch faults.
(LED 2 flashes)
High tempemtore limit switch is open.
Flame sense fault.
(LED 3 flashes)
The IGC* sensed flame that should not be
present.
Reset unit. If problem persists, replace central board.
4 consecutive limit switch faults.
(LED 4 flashes)
Inadequate airflow to unit
Check operation of indoor (evaporator) fan motor and that supply-air
temperature rise agrees with range on unfl nameplate information.
Ignition lockout.
(LED 5 flashes)
Unit unsuccessfully attempted ignition for
15 minutes,
Check ignitor and flame sensor electrode spacing, gaps, etc. Ensure
that flame sense and ignflion wires are properly terminated. Verify
that unit is obtaining proper amount of gas.
Induced-draft motor fault.
(LED 6 flashes)
IGC does not sense that ioduced-draft
motor is operating.*
Check for proper voltage. If motor is operating, check the speed
sensor plug/IGC Terminal J2 connection. Proper connection:
PIN 1 White
PIN 2 -- Red
PIN 3 -- Black.
Roflout switch fault,
(LED 7 flashes)
Roltout switch has opened,
Roliout switch will automatic.afly reset, but IGC* will continue to iockout unit. Check gas valve operation. Ensure that induced-draft
blower wheel is properly secured to motor shaft. Reset unit at unit
disconnect.
Rofiout control fault.
(LED 8 flashes)
Microprocessor has sensed an error in the
software or hardware.
if error code is not cleared by resetting unit power, replace the IGC*.
Electrical interference
Reset 24-v. to control board or tom thermostat off,
then on again. Fault will automatically
reset itsefl in one (1) hour.
Temporary software
lock out.
(LED 9 flashes)
* WARNING i_.
IGC is sens"I_
Check the operation of the indoor (evaporator) fan motor. Ensure
that the supply-air temperature rise is in accordance with the range
on the unit nameplate.
impeding IGC software
: If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling new control board. The
to static electflaity and may he damaged if the necessary precautions are not taken.
IMPORTANT: Refer to Table 17--Troubleshoofing Guide-q-leating for additional troubleshooting analysis.
LEGEND
tP=re----_tegrated Gas Unit Controller
LED -- Light*Emfltiog Diode
3O
START-UP CHECKLIST
(Remove and Store in Job File)
I. PRELIMINARY INFORMATION
MODEL
NO: .............................................................................................................................................................
SERIAL NO: ..............................................................................................................................................................
DATE: ........................................................................................................................................................................
TECHNICIAN:
...........................................................................................................................................................
JOB LOCATION: ...........................................................................................................................................................
H. PRE-START-UP
(insert checkmark in box as each item is completed)
VERIFY THAT ALL PACKING MATERIALS
HAVE BEEN REMOVED
FROM UNIT
__
VERIFY THAT CONDENSATE
CONNECTION
IS INSTALLED PER INSTALLATION
CHECK ALL ELECTRICAL
CONNECTIONS
AND TERMINALS
FOR TIGHTNESS
CHECK GAS PIPING FOR LEAKS
--
CHECK THAT INDOOR (EVAPORATOR)
AIR FILTER IS CLEAN
VERIFY THAT UNIT INSTALLATION
IS LEVEL
__
CHECK FAN WHEEL
PROPELLER
FOR LOCATION
IN HOUSING
INSTRUCTIONS
AND IN PLACE
ORIFICE
AND SETSCREW
TIGHTNESS
HI. START-UP
ELECTRICAL
SUPPLY VOLTAGE L!-L2
COMPRESSOR
AMPS L1
L2-L3 ____
L2
COMPRESSOR
L2
INDOOR
AMPS L1
(EVAPORATOR)
L3-L1
L3
L3
FAN AMPS
TEMPERATURES
OUTDOOR (CONDENSER)
AIR TEMPERATURE:
RETURN-AIR
TEMPERATURE:
DB
COOLING SUPPLY AIR:
GAS HEAT SUPPLY AIR:
PRESSURES
GAS INLET PRESSURE
GAS MANIFOLD
REFRIGERANT
REFRIGERANT
__
VERIFY
__
VERIFY
DIRECTION.
* Me_asured
at suction
t Measured
at liquid
DB
WB
IN. WG
PRESSURE
SUCTION
DISCHARGE
DB
WB
IN. WG
. PSIG
PSIG
SUCTION
REFRIGERANT
CHARGE
USING CHARGING
THAT 3-PHASE
SCROLL
COMPRESSOR
inlet
condenser
31
LINE TEMPt
TABLES
(48GS048
to compP..ssor
line leaving
LINE TEMP*
DISCHARGE
and 48GX030-060)
IS ROTATING
IN CORRECT
Copyright 2006 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
Manufacturer
reserves the right to discontinue, or change at any time, specifications
PC 101
Printed in U.S.A.
Catalog No, 48GS,GX+TSI
or designs without notice and without incurring obligations.
Pg 32
2-06
Replaces: New
Source Exif Data:
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