Bryant 302B Dimensions and installation guide

NOTE: Read the entire instruction manual before starting the
installation.
This symbol →indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................1
Introduction ....................................................................................2
Receiving and Installation..............................................................2
Check Equipment......................................................................2
Provide Unit Support................................................................2
Provide Clearances....................................................................2
Rig and Place Unit....................................................................2
Select and Install Ductwork .....................................................5
Provide for Condensate Disposal.............................................6
Install Electrical Connections...................................................7
PRE-START-UP ..........................................................................10
START-UP...................................................................................12
Check for Refrigerant Leaks..................................................12
Start-Up Adjustments..............................................................12
Defrost Control .......................................................................19
MAINTENANCE.........................................................................20
Air Filter..................................................................................22
Indoor Blower and Motor.......................................................22
Outdoor Coil, Indoor Coil, and Condensate Drain Pan........22
Outdoor Fan............................................................................22
Electrical Controls and Wiring...............................................22
Refrigerant Circuit..................................................................22
Indoor Airflow........................................................................23
Metering Devices–Accurater Piston.......................................23
Pressure Switches....................................................................23
Loss of Charge Switch ...........................................................23
High-Pressure Switch..............................................................23
Copeland Scroll Compressor (Puron Refrigerant).................23
Refrigerant System..................................................................23
System Information.................................................................24
TROUBLESHOOTING ...............................................................24
Start-Up Checklist........................................................................24
NOTE TO INSTALLER — READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY before installing this unit.
Also, make sure the Owner’s Manual and Service Instructions are
left with the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
WARNING: Improper installation, adjustment, alter-
ation, service, maintenance, or use can cause explosion,
fire, electric shock, or other occurrences, which could
cause serious injury or death or damage your property.
Consult a qualified installer or service agency for infor-
mation or assistance. The qualified installer or agency
must use only factory-authorized kits or accessories when
modifying this product.
Recognize safety information. This is the safety-alert symbol .
When you see this symbol on the product or in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words — DANGER, WARNING, CAU-
TION, and NOTE. Danger identifies the most serious hazards,
which will result in severe personal injury or death. Warning
indicates a condition that could cause serious personal injury or
death. 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 will result in
enhanced installation, reliability, or operation.
1. The power supply (volts, phase, and hertz) must correspond
to that specified on unit rating plate.
2. The electrical supply provided by the utility must be
sufficient to handle load imposed by this unit.
Fig. 1—Unit 602B
C99063
Installation, Start-Up,
and Service Instructions
SINGLE-PACKAGE HEAT PUMP UNITS
WITH PURON (R-410A) REFRIGERANT
Cancels: II 602B-24-1 II 602B-24-2
12-00
602B
—1—

3. This installation must conform with local building codes
and with NEC (National Electrical Code). Refer to provin-
cial and local plumbing or waste water codes and other
applicable local codes.
WARNING: Before performing service or maintenance
operations on system, turn off main power to unit. Turn
off accessory heater power switch if applicable. Electrical
shock could cause severe injury or death.
CAUTION: Puron (R-410A) systems operate at higher
pressures than standard R-22 systems. DO not use R-22
service equipment or components on Puron (R-410A)
equipment. Ensure service equipment is rated for Puron
(R-410A)
INTRODUCTION
The 602B heat pump is fully self-contained and designed for
outdoor installation. (See Fig. 1) Standard units are shipped in a
horizontal-discharge configuration for installation on a ground-
level slab. Standard units can be converted to downflow (vertical)
discharge configurations for rooftop applications.
RECEIVING AND INSTALLATION
I. CHECK EQUIPMENT
A. IDENTIFY UNIT
The unit model number and serial number are stamped on the unit
identification plate. Check this information against shipping pa-
pers.
B. INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping pallet.
If unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.
Forward claim papers directly to transportation company. Manu-
facturer is not responsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify the
nearest Bryant Air Conditioning office if any item is missing. To
prevent loss or damage, leave all parts in original packages until
installation.
II. PROVIDE UNIT SUPPORT
A. ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb. (See Fig. 5) Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result in
air leaks and poor unit performance.
Curb should be level to within 1/4 in. (See Fig. 6) This is necessary
for unit drain to function properly. Refer to accessory roof curb
installation instructions for additional information as required.
B. SLAB MOUNT
Place the unit on a solid, level concrete pad that is a minimum of
4 in. thick with 2 in. above grade. (See Fig. 7) The slab should
extend approximately 2 in. beyond the casing on all 4 sides of the
unit. Do not secure the unit to the slab except when required by
local codes.
C. GROUND MOUNT
The unit may be installed either on a slab or placed directly on the
ground if local codes permit. Place the unit on level ground
prepared with gravel for condensate discharge.
III. PROVIDE CLEARANCES
The required minimum service clearances are shown in Figs. 2 and
3. Adequate ventilation and outdoor air must be provided. The
outdoor fan draws air through the outdoor coil and discharges it
through the top fan grill. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction. The minimum clearance
under a partial overhang (such as a normal house overhang) is 48
in. above the unit top. The maximum horizontal extension of a
partial overhang must not exceed 48 in.
IMPORTANT: Do not restrict outdoor airflow. An air restriction
at either the outdoor-air inlet or the fan discharge may be
detrimental to compressor life.
Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on
carpeting or other combustible materials. Slab-mounted units
should be at least 4 in. above the highest expected water and runoff
levels. Do not use unit if it has been under water.
IV. RIG AND PLACE UNIT
Rigging and handling of this equipment can be hazardous for many
reasons due to the installation location (roofs, elevated structures,
etc.)
Only trained, qualified crane operators and ground support staff
should handle and install this equipment.
When working with this equipment, observe precautions in the
literature, on tags, stickers, and labels attached to the equipment,
and any other safety precautions that might apply.
Follow all applicable safety codes. Wear safety shoes and work
gloves.
A. INSPECTION
Prior to initial use, and at monthly intervals, all rigging brackets
and straps should be visually inspected for any damage, evidence
of wear, structural deformation, or cracks. Particular attention
should be paid to excessive wear at hoist hooking points and load
support areas. Brackets or straps showing any kind of wear in these
areas must not be used and should be discarded.
B. INSTALLATION
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 bar of sufficient length to protect unit from
damage.
2. Position the lifting bracket assembly around the base of the
unit. Be sure the strap does not twist.
3. Place each of the 4 metal lifting brackets into the handholds
in the composite pan.
4. Thread lifting bracket strapping around bottom perimeter of
unit as follows:
a. Open lever of tension buckle (ratchet type).
b. Feed strapping through tension buckle as shown in Fig.
8.
c. Pull strapping through tension buckle unit taut.
d. Snap lever down to lock strap in tension buckle. To
release strapping, squeeze safety latch, lift lever, and pull
webbing outward.
5. Tighten the tension buckle until it is taut. Lifting brackets
must be secure in the handholds.
6. Attach field-supplied clevis or hook of sufficient strength to
hole in the lifting bracket. (See Fig. 9)
7. Attach the 2 safety straps directly to the clevis or hook at the
4 rigging brackets. DO NOT attach the safety straps to the
lifting brackets. (See Fig. 9)
—2—

Fig. 2—602B024-036 Unit Dimensions
UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN. (MM)
”A”
CENTER OF GRAVITY
IN. (MM)
lb kg X Y Z
602B024 208/230-1-60 299 135.6 35.02 (889.5) 19.0 (482.6) 18.3 (463.6) 16.0 (406.4)
602B030 208/230-1-60,208/230-3-60 320 145.2 37.02 (940.3) 20.0 (508.0) 19.3 (489.0) 17.6 (447.0)
602B036 208/230-1-60,208/230-3-60, 460-3-60 328 148.8 37.02 (940.3) 20.0 (508.0) 19.0 (482.6) 16.5 (419.1)
C00160
—3—
→

Fig. 3—602B 042-060 Unit Dimensions
UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN. (MM)
”A”
CENTER OF GRAVITY
IN. (MM)
lb kg X Y Z
602B042 208/230-1-60, 208/230-3-60, 460-3-60 350 158.8 40.98 (1040.9) 21.0 (533.4) 20.5 (520.7) 16.6 (421.6)
602B048 208/230-1-60, 208/230-3-60, 460-3-60 355 161.0 40.98 (1040.9) 20.0 (508.0) 21.3 (539.8) 18.0 (457.2)
602B060 208/230-1-60, 208/230-3-60, 460-3-60 428 194.1 42.98 (1091.7) 21.0 (533.4) 20.0 (508.0) 17.6 (447.0)
C00161
—4—

8. Position lifting point directly over the unit’s center of
gravity.
9. Lift unit. When unit is directly over the roof curb, remove
the 2 safety straps. Lower the equipment onto the roof curb.
10. After the unit is placed on the roofcurb or mounting pad,
remove the top crating. On 602B060 units only, 2 wire ties
fastened to the outdoor coils and reversing
valve/accumulator assembly must be cut. Remove the left
and front louver panels and corner post to access wire ties.
The wire tie to be cut on the left is located approximately 4
in. down the tube sheet. The wire tie to be cut on the right
is located approximately 6 in. down the tube sheet.
V. SELECT AND INSTALL DUCTWORK
The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non-residence type air conditioning and ventilating systems, NFPA
90A or residence-type, NFPA 90B and/or local codes and ordi-
nances.
Select and size ductwork, supply-air registers, and return air grilles
according to ASHRAE (American Society of Heating, Refrigera-
tion, and Air Conditioning Engineers) recommendations.
The unit has duct flanges on the supply- and return-air openings on
the side of the unit.
When designing and installing ductwork, consider the following:
WARNING: For vertical supply and return units, tools
or parts could drop into ductwork and cause serious injury
or death. Install a 90 degree turn in the return ductwork
between the unit and the conditioned space. If a 90 degree
elbow cannot be installed, then a grille of sufficient
strength and density should be installed to prevent objects
from falling into the conditioned space. Units with
electric heaters require 90 degree elbow in supply duct.
1. All units should have field-supplied filters or accessory
filter rack installed in the return-air side of the unit.
Recommended sizes for filters are shown in Table 1.
2. Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
IMPORTANT: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weather tight and airtight seal. When electric heat is
installed, use fireproof canvas (or similar heat resistant material)
connector between ductwork and unit discharge connection. If
flexible duct is used, insert a sheet metal sleeve inside duct. Heat
resistant duct connector (or sheet metal sleeve) must extend 24-in.
from electric heater element.
3. Size ductwork for cooling air quantity (cfm). The minimum
air quantity for proper electric heater operation is listed in
Table 2. Heater limit switches may trip at air quantities
below those recommended.
4. Seal, insulate, and weatherproof all external ductwork. Seal,
insulate and cover with a vapor barrier all ductwork passing
through conditioned spaces. Follow latest Sheet Metal and
Air Conditioning Contractors National Association
(SMACNA) and Air Conditioning Contractors Association
(ACCA) minimum installation standards for residential
heating and air conditioning systems.
5. Secure all ducts to building structure. Flash, weatherproof,
and vibration-isolate duct openings in wall or roof accord-
ing to good construction practices.
A. CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (VERTICAL) DISCHARGE UNITS
WARNING: Before performing service or maintenance
operations on system, turn off main power to unit. Turn
off accessory heater power switch if applicable. Electrical
shock could cause serious injury or death.
1. Open all electrical disconnects before starting any service
work.
2. Remove horizontal duct covers to access bottom return and
supply knock out panels.
Fig. 4—Corner Weights
CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET)
Model 602B
Unit 24 30 36
Model 602B
Unit 42 48 60
Total Weight 299 320 328 Total Weight 350 355 428
Corner Weight 1 63 63 64 Corner Weight 1 75 76 92
Corner Weight 2 62 74 76 Corner Weight 2 49 50 60
Corner Weight 3 56 56 58 Corner Weight 3 95 96 116
Corner Weight 4 118 127 130 Corner Weight 4 131 133 160
C00071
12
43
x
y
—5—
→

3. Use a screwdriver and hammer to remove the panels in the
bottom of the base pan.
NOTE: These panels are held in place with tabs similar to an
electrical knockout.
4. Reinstall the horizontal duct covers (Fig. 11) to block off
the horizontal air openings.
NOTE: Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
VI. PROVIDE FOR CONDENSATE DISPOSAL
NOTE: Ensure that condensate-water disposal methods comply
with local codes, restrictions, and practices.
The 602B units dispose of condensate through a 3/4 in. NPT
female fitting that exits on the compressor end of the unit.
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground
level installations. Install a field-supplied condensate trap at end of
Fig. 5—Roof Curb Dimensions
UNIT SIZE ODS CATALOG NUMBER A
IN. (MM) B IN. (MM) C IN. (MM) D IN. (MM)
602B024-036 CPRFCURB006A00 8 (203) 11(279) 161/2 (419) 28-3/4 (730)
CPRFCURB007A00 14 (356) 11(279) 161/2 (419) 28-3/4 (730)
602B042-060 CPRFCURB008A00 8 (203) 16 3/16 (411) 17 3/8 (441) 40-1/4 (1022)
CPRFCURB009A00 14 (356) 16 3/16 (411) 17 3/8 (441) 40-1/4 (1022)
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip 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 lists only the dimensions, per part number, that have changed.
6. Attach ductwork to curb (flanges of duct rest on curb).
7. Insulated panels: 1-in. thick fiberglass 1 lb. density.
8. Dimensions are in inches.
9. When 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.
C00076
Gasket around
outer edge
Insulated
deck pan
Gasket around
duct
S/A
R/A
HVAC unit
base
*Gasketing
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
*Provided with roofcurb
Roof
Duct work
field supplied
Insulation (field
supplied)
Roofcurb*
Wood nailer*
Gasketing
inner flange*
Screw
(NOTE A)
Roof Curb for Small Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
HVAC unit
base
*Gasketing
outer flange
Flashing field
supplied
Roofing material
field supplied
Cant strip
field supplied
*Provided with roofcurb
Roof
Duct work
field supplied
Insulation (field
supplied)
Roofcurb*
Wood nailer*
Gasketing
inner flange*
Screw
(NOTE A)
Roof Curb for Large Cabinet
Note A: When unit mounting screw is used,
retainer bracket must also be used.
A
B Typ.
Supply opening
(B x C)
Long
Support
D
44 5/16"
Return opening
(B X C)
Insulated
deck pan
Short
Support
C Typ.
—6—
→

condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. lower than the drain-pan
condensate connection to prevent the pan from overflowing. Prime
the trap with water. When using a gravel apron, make sure it slopes
away from the unit.
If the installation requires draining the condensate water away
from the unit, install a field-supplied 2 -in. trap at the condensate
connection to ensure proper drainage. Condensate trap is available
as an accessory or is field-supplied. Make sure that the outlet of the
trap is at least 1 in. lower than the unit drain-pan condensate
connection to prevent the pan from overflowing. Connect a drain
trough using a minimum of field-supplied 3/4-in. PVC or field-
supplied 3/4-in. copper pipe at outlet end of the 2-in. trap. (See Fig.
12) Do not undersize the tube. Pitch the drain trough downward at
a slope of at least 1 in. every 10 ft. of horizontal run. Be sure to
check the drain trough for leaks. Prime the trap at the beginning of
the cooling season start-up.
VII. INSTALL ELECTRICAL CONNECTIONS
WARNING: The unit cabinet must have an uninter-
rupted, unbroken electrical ground to minimize the pos-
sibility of personal injury if an electrical fault should
occur. This ground may consist of an electrical wire
connected to the unit ground lug in the control compart-
ment, or conduit approved for electrical ground when
installed in accordance with NEC, ANSI/NFPA Ameri-
can National Standards Institute/National Fire Protection
Association (latest edition) (in Canada, Canadian Electri-
cal Code CSA C22.1) and local electrical codes. Failure
to adhere to this warning could result in serious injury or
death.
Fig. 6—Unit Leveling Tolerances
C99065
A
B
CMAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B B-C A-C
1/4 1/4 1/4
Fig. 7—Slab Mounting Detail
C99096
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP. COIL COND. COIL
2"
Fig. 8—Threading Belt
C99067
HANDHOLD
FEED
HOOK
Fig. 9—Suggested Rigging
UNIT MAXIMUM WEIGHT A B
Size lb kg in. mm. in. mm.
602B024 321 145.6 19.0 482.6 18.25 463.6
602B030 342 155.2 20.0 508 19.25 489
602B036 350 158.8 20.0 508 19.0 482.6
602B042 372 168.8 21.0 533.4 20.5 520.7
602B048 377 171.0 20.0 508 21.25 539.8
602B060 450 204.2 21.0 533.4 20.0 508.0
C99075
PLACE RIGGING BRACKET ASSEMBLY IN 4
HAND HOLES AND INSTALLTIE DOWN STRAP
AROUND PERIMETER OF UNIT ANDTHROUGH
SPACE IN BRACKET ASSEMBLY
INSTALL SAFETY STRAPSTO
RIGGING CLEVIS AT 4 RIGGING BRACKETS
TIGHTEN STRAPPING SECURELY
WITH TENSION BUCKLE
SEE DETAIL A
DETAIL A
SCALE 0.250
914-137"
(36"-54")
“A”
“B”
—7—

CAUTION: Failure to follow these precautions could
result in damage to the unit being installed:
1. Make all electrical connections in accordance with
NEC 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 Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.
2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within
operating voltage range indicated on unit rating plate.
On 3-phase units, ensure phases are balanced within 2
percent. Consult local power company for correction
of improper voltage and/or phase imbalance.
4. Insulate low-voltage wires for highest voltage con-
tained within conduit when low-voltage control wires
are in same conduit as high-voltage wires.
5. Do not damage internal components when drilling
through any panel to mount electrical hardware, con-
duit, etc.
A. HIGH-VOLTAGE CONNECTIONS
The unit must have a separate electrical service with a field-
supplied, waterproof disconnect switch mounted at, or within sight
from the unit. Refer to the unit rating plate, NEC and local codes
for maximum fuse/circuit breaker size and minimum circuit amps
(ampacity) for wire sizing (See Table 3 for electrical data).
The field-supplied disconnect may be mounted on the unit over the
high-voltage inlet hole (See Figs. 2 and 3).
If the unit has an electric heater, a second disconnect may be
required. Consult the Installation, Start-Up, and Service Instruc-
tions provided with the accessory for electrical service connec-
tions.
Operation of unit on improper line voltage constitutes abuse and
may cause unit damage that could affect warranty.
B. ROUTING POWER LEADS INTO UNIT
Use only copper wire between disconnect and unit. The high-
voltage leads should be in a conduit until they enter the duct panel;
conduit termination at the duct panel must be watertight. Run the
high-voltage leads through the power entry knockout on the power
entry side panel. (See Fig. 2 and 3 for location and size) When the
leads are inside the unit, run leads up the high-voltage raceway to
the line wiring splice box. (See Fig. 13 through 15) For single-
TABLE 1—PHYSICAL DATA—UNIT 602B
UNIT SIZE 602B024 602B030 602B036 602B042 602B048 602B060
NOMINAL CAPACITY (ton) 2 2-1/2 3 3-1/2 4 5
OPERATING WEIGHT (lb.) 299 320 328 350 355 428
COMPRESSOR QUANTITY 1
TYPE SCROLL COMPRESSOR
REFRIGERANT R-410A
REFRIGERANT METERING DEVICE Accurater
Refrigerant (R-410A) Quantity (lb.) 7.0 8.9 9.3 9.5 10.6 12.4
ORIFICE ID (in.) 0.061 0.061 0.067 0.073 0.076 0.088
ORIFICE OD (in.) 0.032 (2) 0.040 (2) 0.040 (2) 0.038 (2) 0.046 (2) 0.052 (2)
OUTDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
2...17
8.5 2...17 10.3 2...17 10.3 2...17 13.5 2...17 13.5 2...17 15.4
OUTDOOR FAN
Nominal Airflow (CFM)
Diameter
Motor HP (RPM)
2350
22
1/8 (825)
2350
22
1/8 (825)
2800
22
1/4 (1100)
2500
22
1/8 (825)
3300
22
1/4 (1100)
3300
22
1/4 (1100)
INDOOR COIL
Rows... Fins/in.
face area (sq. ft.)
3...15
3.7 3...15 3.7 4...15 3.7 3...15 4.7 4...15 4.7 4...15 5.7
INDOOR BLOWER
Nominal Airflow (CFM)
Size (in.)
Motor (HP)
800
10x10
1/4
1000
10x10
1/4
1200
10x10
1/2
1400
11x10
1/2
1600
11x10
1/2
1750
11x10
1
HIGH-PRESSURE SWITCH (psig)
Cutout
Reset (Auto)
610±15
420±25
LOSS-OF-CHARGE/LOW-PRESSURE SWITCH
(Liquid Line) (psig)
Cutout
Reset (Auto)
20±5
45±10
RETURN-AIR FILTERS (in.)*
throwaway 20x20x1 20x20x1 20x24x1 24x30x1 24x30x1 24x30x1
* Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300
ft/minute for throwaway type or 450 ft/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.
TABLE 2—MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION (CFM)
SIZE 602B024 602B030 602B036 602B042 602B048 602B060
AIRFLOW (CFM) 800 1000* 1200 1400 1600 2000
* The 030 size models must be run on medium or high speed when used in conjunction with 15 kw electric heat accessory
—8—

phase units, connect leads to the black and yellow wires; for
3-phase units, connect the leads to the black, yellow, and blue
wires. (See Fig. 18)
C. CONNECTING GROUND LEAD TO GROUND LUG
Refer to Fig. 18. Connect the ground lead to the chassis using the
ground lug in the wiring splice box.
D. ROUTING CONTROL POWER WIRES (24-V)
Form a drip-loop with the thermostat leads before routing them
into the unit. Route the thermostat leads through grommeted,
low-voltage hole provided in unit into unit control power splice
box. (See Fig. 2 and 3) Connect thermostat leads to unit control
power leads as shown in Fig. 17.
The unit transformer supplies 24-v power for complete system
including accessory electrical heater. An automatic-reset circuit
breaker (See Fig. 19) is provided in the 24-v circuit; see the caution
label on the transformer or Fig. 20. Transformer is factory wired
for 230-v operation. If supply voltage is 208-v, rewire transformer
primary as described in Special Procedures for 208-v Operation
section.
E. SPECIAL PROCEDURES FOR 208-V OPERATION
1. Be sure unit disconnect switch is open.
2. Disconnect the yellow primary lead (w 110) from the
transformer. See unit wiring label. (See Fig. 13 and 14)
3. Connect the yellow primary lead (w110) to the transformer
terminal labeled 200-v.
Indoor blower-motor speeds may need to be changed for 208-v
operation. Refer to indoor airflow and airflow adjustments section.
Fig. 10—Typical Installation
C00063
INDOOR
THERMOSTAT
DISCONNECT
PER NEC*
FROM
POWER
SOURCE
RETURN
AIR
TOP COVER
*NEC - NATIONAL ELECTRICAL CODE
Fig. 11—602B with Duct Covers On
C00092
Duct Covers
Fig. 12—Condensate Trap
C99013
1”MIN.
2”MIN.
TRAP
OUTLET
—9—

TABLE 3—ELECTRICAL DATA—602B
UNIT 602B
SIZE V-PH-HZ VOLTAGE
RANGE COMPRESSOR ODFM
FLA IDFM FLA ELECTRIC HEAT SINGLE POINT POWER SUPPLY
Min Max RLA LRA Nominal Kw* FLA UNIT MCA MAX FUSE OR CKT BKR MOCP
024 208/230–1–60 187 253 13.5 61.0 0.9 2.0 -/- 3.8/5.0
7.5/10.0
-/-
18.1/20.8
36.1/41.7
19.8/19.8
42.3/45.8
64.9/71.9
30/30
50/50
-
-
-
70/80
030
208/230–1–60 187 253 15.9 73.0 0.9 2.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
-/-
18.1/20.8
36.1/41.7
54.2/62.5
22.9/22.9
45.4/48.9
68.0/75.0
90.6/101.0
30/30
50/50
-
-
-
-
70/80
100/110
208/230–3–60 187 253 10.9 63.0 0.9 2.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
-/-
10.4/12.0
20.8/24.1
31.3/36.1
16.6/16.6
29.7/31.7
42.7/46.7
55.7/61.7
20/20
35/35
45/50
60/-
-
-
-
-/70
036
208/230–1–60 187 253 16.9 83.0 1.6 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
-/-
18.1/20.8
36.1/41.7
54.2/62.5
26.8/26.8
49.4/52.9
72.0/78.9
94.5/105.0
40/40
60/60
-
-
-
-
-
80/80
100/110
208/230–3–60 187 253 12.2 77.0 1.6 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
-/-
10.4/12.0
20.8/24.1
31.3/36.1
21.0/21.0
34.0/36.0
47.0/51.0
60.0/66.1
30/30
40/40
50/60
-
-
-
-
70/70
460–3–60 414 506 5.8 35.0 0.9 2.0
-/-
5.0
10.0
15.0
-/-
6.0
12.0
18.0
10.2
17.7
25.2
32.7
15
20
30
35
-
-
-
-
042
208/230–1–60 187 253 22.4 105.0 0.9 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
18.1/20.8
36.1/41.7
54.2/62.5
72.2/83.3
33.0/33.0
55.6/59.0
78.1/85.1
100.7/111.1
123.3/137.2
40/40
60/60
-
-
-
-
-
90/90
110/125
125/150
208/230–3–60 187 253 15.4 88.0 0.9 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48.0
24.3/24.3
37.3/39.3
50.3/54.3
63.3/69.4
76.2/84.2
30/30
50/50
60/60
-
-
-
-
-
70/70
80/90
460–3–60 414 506 7.3 39.0 0.9 2.0
-/-
5.0
10.0
15.0
20.0
-/-
6.0
12.0
18.0
24.1
12.0
19.5
27.1
34.6
42.1
15
25
30
35
45
-
-
-
-
-
048
208/230–1–60 187 253 21.3 109.0 1.6 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
18.1/20.8
36.1/41.7
54.2/62.5
72.2/83.3
32.3/32.3
54.9/58.4
77.5/84.4
100.0/110.5
122.6/136.5
40/40
-
-
-
-
-
70/70
80/90
110/125
125/150
208/230–3–60 187 253 14.7 91.0 1.6 4.1
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48.0
24.1/24.1
37.1/39.1
50.1/54.1
63.2/69.2
76.0/84.0
30/30
45/50
60/60
-
-
-
-
-
70/70
80/90
460–3–60 414 506 7.2 46.0 0.9 2.0
-/-
5.0
10.0
15.0
20.0
-/-
6.0
12.0
18.0
24.1
11.9
19.4
26.9
34.5
42.0
15
25
30
35
45
-
-
-
-
-
060
208/230–1–60 187 253 27.6 158.0 1.5 6.2
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
18.1/20.8
36.1/41.7
54.2/62.5
72.2/83.3
42.2/42.2
64.8/68.2
87.3/94.3
109.9/120.3
132.5/146.4
50/50
-
-
-
-
-
80/80
100/110
110/125
150/150
208/230–3–60 187 253 19.2 137.0 1.5 6.2
-/-
3.8/5.0
7.5/10.0
11.3/15.0
15.0/20.0
-/-
10.4/12.0
20.8/24.1
31.3/36.1
41.6/48.0
31.7/31.7
44.7/46.7
57.8/61.8
70.8/76.8
83.7/91.7
40/40
50/60
-
-
-
-
-
70/70
80/80
90/100
460–3–60 414 506 9.0 62.0 0.9 3.2
-/-
5.0
10.0
15.0
20.0
-/-
6.0
12.0
18.0
24.1
15.4
22.9
30.4
37.9
45.4
20
30
35
40
50
-
-
-
-
-
—10—

Fig. 13—Wiring Schematics
C00152
—11—
→

Fig. 14—Wiring Schematics
C00153
—12—
→

Fig. 15—Wiring Schematics
C00154
—13—
→

Fig. 16—Electrical Data Legend
C99024
452=5v
457=7v
455=2v
LEGEND
FLA —Full Load Amps
LRA —Locked Rotor Amps
MCA —Minimum Circuit Amps
MOCP —Maximum Overcurrent Protection
RLA —Rated Load Amps
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. The CGA (Canadian Gas
Association) 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 volt-
age is greater than 2%.
Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v 452 + 464 + 455
Average Voltage = 3
1371
=3
= 457
Determine maximum deviation from average voltage.
(AB) 457
(BC) 464
(AC) 457
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%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
®
*Heater capacity (KW) based on heater voltage of 208v, 240v, & 480v.
If power distribution voltage to unit varies from rated heater voltage,
heater KW will vary accordingly.
Fig. 17—Control Connections
C99056
Y
C
W2
E
G
R
O
THERMOSTAT
AND SUBBASE UNIT CONTROL POWER SPLICE BOX
BRN
WHT
YEL
GRN
RED
ORN
Fig. 18—Line Power Connections
C99057
GROUND LUG
(IN SLPICE BOX)
BLU
YEL
BLK
GROUND
LEAD
SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
3-PHASE
CONNECTIONS
LEGEND
NEC –National Electrical Code
Field Wiring
Splice Connections
NOTE: Use copper wire only.
L1
L3
L2
—14—

PRE-START-UP
WARNING: Failure to observe the following warnings
could result in serious personal injury or death:
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.
3. Do not remove compressor terminal cover until all
electrical sources are disconnected.
4. Relieve and recover all refrigerant from both high- and
low-pressure sides of system before touching or dis-
turbing anything inside terminal box if 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 any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective goggles and
proceed as follows:
a. Shut off electrical power to unit.
b. Relieve and reclaim all refrigerant from system
using both high- and low-pressure ports.
c. Cut component connecting tubing with tubing cutter
and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
Use the Start-Up Checklist supplied at the end of this book and
proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove all access panels.
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a refrig-
erant leak. Leak-test all refrigerant tubing connections
using electronic leak detector, or liquid-soap solution. If
a refrigerant leak is detected, see following Check for
Refrigerant Leaks section.
c. Inspect all field and factory-wiring connections. Be sure
that connections are completed and tight.
d. Inspect coil fins. If damaged during shipping and han-
dling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that outdoor-fan blade is correctly positioned
in fan orifice.
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain pan and trap are filled
with water to ensure proper drainage.
d. Make sure that –on the 060 size, only –the 2 wire ties
fastened to the outdoor coils and reversing
valve/accumulator have been removed.
e. Make sure that all tools and miscellaneous loose parts
have been removed.
5. Compressors are internally spring mounted. Do not loosen
or remove compressor hold-down bolts.
Fig. 19—Control Wiring Plate
C99070
24 V Circuit Breaker
24 Volt Compartment
Fig. 20—Transformer Label
C99058
TRANSFORMER CIRCUIT CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR
IT WILL NOT AUTOMATICALLY RESET
DISCONNECT POWER PRIORTO
SERVICING
THIS COMPARTMENT MUST BE CLOSED
EXCEPT WHEN SERVICING
—15—

6. Each unit system has 2 Schrader-type ports, one low-side
Schrader fitting located on the suction line, and one
high-side Schrader fitting located on the compressor dis-
charge line. Be sure that caps on the ports are tight.
START-UP
Using the Start-Up Checklist supplied at the end of this book,
proceed as follows:
I. CHECK FOR REFRIGERANT LEAKS
Locate and repair refrigerant leaks and charge the unit as follows:
1. Use both high- and low-pressure ports to relieve system
pressure and reclaim remaining refrigerant.
2. Repair leak following accepted practices.
NOTE: Install a bi-flow filter drier whenever the system has been
opened for repair.
3. Check system for leaks using an approved method.
4. Evacuate refrigerant system and reclaim refrigerant if no
additional leaks are found.
5. Charge unit with R-410A refrigerant, using a volumetric-
charging cylinder or accurate scale. Refer to unit rating
plate for required charge.
II. START-UP ADJUSTMENTS
Complete the required procedures given in the Pre-Start-Up
section before starting the unit. Do not jumper any safety devices
when operating the unit. Do not operate the unit in Cooling mode
when the outdoor temperature is below 40°F (unless accessory
low-ambient kit is installed). Do not rapid-cycle the compressor.
Allow 5 min. between “on”cycles to prevent compressor damage.
A. CHECKING COOLING AND HEATING CONTROL OP-
ERATION
Start and check the unit for proper control operation as follows:
1. Place room thermostat SYSTEM switch or MODE control
in OFF position. Observe that blower motor starts when
FAN mode is placed in FAN ON position and shuts down
within 60 sec (030-060 size) or 30 sec (024 size) when FAN
MODE switch is placed in AUTO position.
2. Place system switch or MODE control in HEAT position.
Set control above room temperature. Observe that compres-
sor, outdoor fan, and indoor blower motors start. Observe
that heating cycle shuts down when control setting is
satisfied.
3. When using an automatic changeover room thermostat,
place both SYSTEM or MODE control and FAN mode
switches in AUTO positions. Observe that unit operates in
Cooling mode when temperature control is set to “call for
Cooling”(below room temperature), and unit operates in
Heating mode when temperature control is set to “call for
Heating”(above room temperature).
IMPORTANT: Three-phase, scroll compressors are direction
oriented. Unit must be checked to ensure proper compressor
3-phase power lead orientation. If not corrected within 5 minutes,
the internal protector will shut off the compressor. The 3-phase
power leads to the unit must be reversed to correct rotation. When
turning backwards, the difference between compressor suction and
discharge pressures may be dramatically lower than normal.
B. CHECKING AND ADJUSTING REFRIGERANT
CHARGE
The refrigerant system is fully charged with R-410A refrigerant
and is tested and factory sealed.
NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper R-410A
charge. The charging label and the tables shown refer to system
temperatures and pressures in Cooling mode, only. A refrigerant
charging label is attached to the outside of the service access door.
If charge level is suspect in Heating mode, reclaim all refrigerant
and charge to nameplate amount. (This information may be
obtained from the physical data table also.) The charging label and
the tables shown refer to system temperatures and pressures in
Cooling mode only. A refrigerant charging label is attached to the
outside of the service access door. If charge level is suspect in
Heating mode, reclaim all refrigerant and charge to nameplate
amount. (This information may be obtained from the physical data
table also.)
IMPORTANT: When evaluating the refrigerant charge, an indi-
cated adjustment 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 insuf-
ficient airflow across either coil or both coils.
C. REFRIGERANT CHARGE
The amount of refrigerant charge is listed on the unit nameplate
and/or the physical data table. Refer to the Refrigeration Service
Techniques Manual, Refrigerants Section.
D. NO CHARGE
Check for leak. Use standard evacuating techniques. After evacu-
ating system, weigh in the specified amount of refrigerant (refer to
system data plate).
E. LOW CHARGE COOLING
Use Cooling Charging Charts (Figs. 25-30). Vary refrigerant until
the conditions of the chart are met. Note that charging charts are
different from type normally used. Charts are based on charging
the units to correct superheat for the various operating conditions.
Accurate pressure gauge and temperature sensing devices are
required. Connect the pressure gauge to the service port on the
suction line. Mount the temperature sensing device on the suction
line and insulate it so that the outdoor ambient does not affect the
reading. Indoor air CFM must be within the normal operating
range of the unit.
F. TO USE COOLING CHARGING CHARTS
Take the outdoor ambient temperature and read the suction
pressure gauge. Refer to the chart to determine what the suction
temperature should be.
NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.
G. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS
CAUTION: For heating and cooling operation, the rec-
ommended airflow is 350 to 450 cfm for each 12,000
Btuh of rated cooling capacity. For units with optional
electric heat, the airflow must not be reduced below the
levels stated in Table 2.
Table 4 shows both heating and cooling airflows at various
external static pressures. Refer to these tables to determine the
airflow for the system being installed.
Fig. 21—Fan Blade Clearance
C99009
FAN GRILLE
MOTOR
1/8" MAX BETWEEN
MOTORAND FAN HUB MOTOR SHAFT
—16—

NOTE: Be sure that all supply-and return-air grilles are open, free
from obstructions, and adjusted properly.
Airflow can be changed by changing the lead connection of the
blower motor.
Unit 602B three-speed motors (except sizes 030 and 048) are
factory wired for low speed operation. Units 602B 030 and 048 are
factory wired for medium speed.
For 208/230-v Motors:—The motor leads are color-coded as
follows:
3-SPEED
Black = high speed
Blue = medium speed
Red = low speed
To change the speed of the blower motor (BM), remove the fan
motor speed leg lead from the blower relay (BR). This wire is
attached to IGC terminal BM for single-phase and 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.
For 460-v GE Motors—The motor leads are color coded as
follows:
3-SPEED
Black = high
Violet = jumper
Orange = medium
Red = low
To change the speed of the blower motor (BM), remove fan motor
speed lead from the blower relay (BR) and replace with the lead
for the desired blower motor speed. The motor speed lead is
attached to terminal BM. For low and medium speeds, black must
be connected to the jumper wire. Insulate removed lead end to
avoid contact with chassis parts. To select high speed on 460-v GE
motors, separate the black female quick connect (QC) from the
jumper lead male quick connect (QC) and connect the black lead
to the BR. Insulate the jumper to avoid contact with any chassis
parts.
Fig. 22—Typical Heat Pump Operation, Heating Mode
C00095
COMPRESSOR
ACCUMULATOR
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS –High Pressure Switch
LCS –Loss of Charge Switch
Accurater®Metering Device
Arrow indicates direction of flow
Bypass
Position
Metering
Position
HPS
Fig. 23—Typical Heat Pump Operation, Cooling Mode
C00096
COMPRESSOR
ACCUMULATOR
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS –High Pressure Switch
LCS –Loss of Charge Switch
Accurater®Metering Device
Arrow indicates direction of flow
Metering
Position
Bypass
Position
HPS
—17—

III. DEFROST CONTROL
A. Quiet Shift
Quiet Shift is a field-selectable defrost mode, which will eliminate
occasional noise that could be heard at the start of defrost cycle
and restarting of heating cycle. It is selected by placing DIP switch
3 (on defrost board) in ON position.
When Quiet Shift switch is placed in ON position, and a defrost is
initiated, the following sequence of operation will occur. Revers-
ing valve will energize, outdoor fan will turn off, compressor will
turn off for 30 sec and then turn back on to complete defrost. At
the start of heating after conclusion of defrost reversing valve will
de-energize, compressor will turn off for another 30 sec, and the
outdoor fan will stay off for 40 sec, before starting in the Heating
mode.
B. Defrost
The defrost control is a time/temperature control which includes a
field-selectable time period (DIP switch 1 and 2 on the board)
between defrost cycles of 30, 60, 90, or 120 minutes (factory set at
30 minutes).
TABLE 4—WET COIL AIR DELIVERY
UNIT 602B 024-060 (DEDUCT 10 PERCENT FOR 208-V)*
UNIT MOTOR SPEED EXTERNAL STATIC PRESSURE (IN. WG)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
024
Low Watts 275 273 271 270 -------
Cfm923844754669-------
Med Watts - - - 359 353 350 347 341 - - -
Cfm - - - 941 876 814 737 622 - - -
High Watts ------447439431423-
Cfm------968869765659-
030
Low Watts 276 276 272 --------
Cfm963929781--------
Med Watts 375 377 371 362 354 350 - - - - -
Cfm 1202 1170 1079 976 884 807 - - - - -
High Watts ----469449435428---
Cfm----1174 988 828 718 - - -
036
Low Watts 462 451 431 411 394 381 - - - - -
Cfm 1374 1290 1205 1116 1020 916 - - - - -
Med Watts 523 506 490 471 449 426 - - - - -
Cfm 1500 1408 1301 1190 1082 977 - - - - -
High Watts - 645 628 610 595 584 575 - - - -
Cfm - 1474 1369 1267 1169 1069 962 - - - -
042
Low Watts 660 639 524 611 598 583 564 541 518 495 473
Cfm 1701 1659 1618 1576 1531 1481 1425 1363 1293 1223 1154
Med Watts -----704675645614582550
Cfm-----1701 1631 1550 1460 1361 1256
High Watts -------806777749726
Cfm-------1708 1614 1521 1435
048
Low Watts 620 600 586 574 562 548 530 510 487 - -
Cfm 1662 1621 1581 1540 1496 1447 1392 1331 1263 - -
Med Watts 763 747 729 709 686 661 634 606 577 547 517
Cfm 1917 1868 1822 1774 1722 1662 1594 1515 1427 1330 1227
High Watts - - - 852 832 809 784 757 730 704 682
Cfm - - - 1982 1914 1839 1757 1669 1577 1486 1402
060
Low Watts 597 592 578 526 460 452 445 - - - -
Cfm 2265 2190 2101 2033 1974 1869 1614 - - - -
Med Watts 754 730 707 687 671 658 646 630 603 558 486
Cfm 2383 2282 2202 2134 2070 2005 1935 1858 1771 1667 1576
High Watts 901 876 856 836 813 785 755 723 696 681 687
Cfm 2480 2383 2301 2233 2175 2122 2066 1998 1910 1788 1619
* Air delivery values are based on operating voltage of 230-v or 460-v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drop (see Tables
5 and 6) to obtain static pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below
this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
3. Deduct 10 percent for 208-v.
TABLE 5—FILTER PRESSURE DROP TABLE (IN. WG)
FILTER SIZE CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 ———————————
20X24X1 ————0.09 0.10 0.11 0.13 0.14 0.15 0.16 ————————
24X30X1 —————— —0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
—18—

To initiate a forced defrost, two options are available depending on
the status of the defrost thermostat.
If defrost thermostat is closed, speedup pins (J1) must be shorted
by placing a flat head screw driver in between for 5 sec and
releasing, to observe a complete defrost cycle. When the Quiet
Shift switch is selected, compressor will be turned off for two 30
sec intervals during this complete defrost cycle, as explained
previously. When Quiet Shift switch is in factory default OFF
position, a normal and complete defrost cycle will be observed.
If defrost thermostat is in open position, and speedup pins are
shorted (with a flat head screw driver) for 5 sec and released,a
short defrost cycle will be observed (actual length is dependent
upon the selected Quiet Shift position). When Quiet Shift switch is
in ON position, the length of defrost is 1 minute (30 sec
compressor off period followed by 30 sec of defrost with com-
pressor operation). On return to heating operation, compressor will
again turn off for an additional 30 sec and the outdoor fan for 40
sec. When the Quiet Shift is in OFF position, only a brief 30 sec
cycle will be observed.
If it is desirable to observe a complete defrost in warmer weather,
the defrost thermostat must be closed as follows.
1. Turn off power to outdoor unit.
2. Disconnect outdoor fan motor lead from OF2 on control
board. (See Fig. 19) Tape to prevent grounding.
TABLE 6—ELECTRIC HEAT PRESSURE DROP TABLE
SMALL CABINET: 024-036CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
5kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07
10 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
20 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19
ELECTRIC HEAT PRESSURE DROP TABLE
LARGE CABINET: 042-060
CFM
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
5kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
10 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16
Fig. 24—602B Balance Point Worksheet
C00138
Balance PointWorksheet
0
10
20
30
40
50
60
70
-100 1017203040475060
Outdoor Air Temp (Deg F)
Building Heat Loss, 1000BTUH
Unit Integrated Heating Capacity (x1000BTUH)
024
030
036
042
048
060
Based on Indoor Entering Air of 70 F and Rated CFM
—19—
→

(024) 60 Hz COOLING CHARGING CHART
For use with units using R410a Refrigerant
80
90
100
110
120
130
140
150
160
170
180
20 30 40 50 60 70 80
SUCTION LINE TEMPERATURE (DEG. F)
SUCTION LINE PRESSURE (PSIG)
552
652
752
852
952
1052
1152
-7 -1 4 10 15 21 26
SUCTION LINE TEMPERATURE (DEG. C)
SUCTION LINE PRESSURE (kPa)
OUTDOOR
TEMP
F C
125 52
115 46
105 41
95 35
85 29
75 24
65 18
55 13
45 7
50JZ500066
C00082
Fig. 25—Cooling Charging Chart, 602B 024 Units
Fig. 27—Cooling Charging Chart, 602B 036 Units
C00084
(036) 60 Hz COOLING CHARGING CHART
For Use with Units Using R410a Refrigerant
80
90
100
110
120
130
140
150
160
170
180
20 30 40 50 60 70 80
SUCTION LINE TEMPERATURE (DEG. F)
SUCTION LINE PRESSURE (PSIG)
552
621
690
759
828
897
966
1035
1104
1173
-7 -1 4 10 15 21 26
SUCTION LINE TEMPERATURE (DEG. C)
SUCTION LINE PRESSURE (KILOPASCALS)
OUTDOOR
TEMP
F C
125 52
115 46
105 41
95 35
85 29
75 24
65 18
55 13
45 7
50JZ500068
(030) 60 Hz COOLING CHARGING CHART
For Use with Units Using R410a Refrigerant
80
90
100
110
120
130
140
150
160
170
180
20 30 40 50 60 70 80
SUCTION LINE TEMPERATURE (DEG. F)
SUCTION LINE PRESSURE (PSIG)
552
621
690
759
828
897
966
1035
1104
1173
-7 -1 4 10152126
SUCTION LINE TEMPERATURE (DEG. C)
SUCTION LINE PRESSURE (KILOPASCALS)
OUTDOOR
TEMP
F C
125 52
115 46
105 41
95 35
85 29
75 24
65 18
55 13
45 7
50JZ500067
C00083
Fig. 26—Cooling Charging Chart, 602B 030Units
(042) 60 Hz COOLING CHARGING CHART
For use with units using R410a Refrigerant
80
90
100
110
120
130
140
150
160
170
180
20 30 40 50 60 70 80
SUCTION LINE TEMPERATURE (DEG. F)
SUCTION LINE PRESSURE (PSIG)
552
621
690
759
828
897
966
1035
1104
1173
-7 -1 4 10152126
SUCTION LINE TEMPERATURE (DEG. C)
SUCTION LINE PRESSURE (KILOPASCALS)
OUTDOOR
TEMP
F C
125 52
115 46
105 41
95 35
85 29
75 24
65 18
55 13
45 7
50JZ500069
C00085
Fig. 28—Cooling Charging Chart, 602B 042 Units
—20—