Bryant 604B 024–060, 604B024, 604B036, 604B030, 604B042 Installation, Start-up And Service Instructions Manual

Installation, Start-Up,
and Service Instructions

604B 024–060
SINGLE-PACKAGED HEAT PUMP UNITS
WITH PURON® (R-410A) REFRIGERANT

Cancels: II 604B.24.2 II 604B.24.3

12–03

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

IDENTIFY UNIT................................................................2

INSPECT SHIPMENT........................................................2

Provide Unit Support................................................................2

ROOF CURB.......................................................................2

SLAB MOUNT ...................................................................2

GROUND MOUNT ............................................................2

Provide Clearances....................................................................2

Rig and Place Unit....................................................................2

INSPECTION......................................................................3

INSTALLATION ................................................................3

Select and Install Ductwork .....................................................5

CONVERTING HORIZONTAL DISCHARGE UNITS TO

DOWNFLOW (VERTICAL) DISCHARGE UNITS.........7

Provide for Condensate Disposal.............................................7

Install Electrical Connections...................................................8

HIGH-VOLTAGE CONNECTIONS..................................9

ROUTING POWER LEADS INTO UNIT........................9

CONNECTING GROUND LEAD TO GROUND LUG ..9

ROUTING CONTROL POWER WIRES (24-V)..............9

Easy Select™—604B........................................................10

604B Sequence Of Operation ...........................................17

SPECIAL PROCEDURES FOR 208-V OPERATION ...17

PRE-START-UP ..........................................................................18

START-UP...................................................................................18

604B: Start-Up........................................................................18

Check for Refrigerant Leaks..................................................19

Start-Up Adjustments..............................................................19

CHECKING COOLING AND HEATING CONTROL OP-

ERATION..........................................................................19

CHECKING AND ADJUSTING REFRIGERANT

CHARGE...........................................................................19

REFRIGERANT CHARGE..............................................20

NO CHARGE....................................................................20

LOW CHARGE COOLING .............................................20

TO USE COOLING CHARGING CHARTS ..................20

INDOOR AIRFLOW AND AIRFLOW ADJUST-

MENTS..............................................................................21

Defrost Control .......................................................................21

Quiet Shift..........................................................................21

Defrost................................................................................22

MAINTENANCE.........................................................................23

Air Filter..................................................................................24

Indoor Blower and Motor.......................................................24

Outdoor Coil, Indoor Coil, and Condensate Drain Pan........24

Outdoor Fan............................................................................24

Electrical Controls and Wiring...............................................25

Refrigerant Circuit..................................................................25

Indoor Airflow........................................................................25

Metering Devices–TXV & Accurater Piston.........................25

Pressure Switches....................................................................25

Loss of Charge Switch ...........................................................25

High-Pressure Switch..............................................................25

Copeland Scroll Compressor (Puron Refrigerant).................25

Refrigerant System..................................................................26

Refrigerant .........................................................................26

Compressor Oil..................................................................26

Servicing Systems on Roofs with Synthetic Materials....26

Liquid Line Filter Drier ....................................................26

Puron (R-410A) Refrigerant Charging .............................26

System Information.................................................................26

Loss of Charge Switch......................................................26

Check Defrost Thermostat ................................................26

TROUBLESHOOTING ...............................................................26

Start-Up Checklist........................................................................26

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.

C99064

Fig. 1—Unit 604B

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.

—1—

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, alter­ation, 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 infor­mation 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, CAU­TION, 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.

3. This installation must conform with local building codes
and with NEC (National Electrical Code). Refer to provin­cial 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 604B 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 ground­level 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 pa­pers.

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. Manu­facturer 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.

—2—

Required Clearance for Operation and Service

UNIT ELECTRICAL CHARACTERISTICS

604B024 208/230-1-60 350 159 39.02 (991.1) 20.0 (508.0) 19.3 (489.0) 17.6 (447.0)
604B030 208/230-1-60 350 159 39.02 (991.1) 20.0 (508.0) 19.3 (489.0) 17.6 (447.0)
604B036 208/230-1-60,208/230-3-60 373 169 41.02 (1041.9) 20.0 (508.0) 14.0 (355.6) 13.0 (330.2)

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.

UNIT WEIGHT

lb kg X Y Z

UNIT HEIGHT

IN. (MM)

”A”

Fig. 2—604B024-036 Unit Dimensions

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.

—3—

C00160

CENTER OF GRAVITY

IN. (MM)

UNIT ELECTRICAL CHARACTERISTICS

604B042 208/230-1-60, 208/230-3-60 440 200 42.98 (1091.7) 21 (533.4) 20.5 (520.7) 16.6 (421.6)
604B048 208/230-1-60, 208/230-3-60 463 210 44.98 (1142.5) 19.5 (495.3) 21.3 (539.8) 18.0 (457.2)
604B060 208/230-1-60, 208/230-3-60 499 226 46.98 (1193.3) 21.0 (533.4) 20.0 (508.0) 17.6 (442.0)

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 rigging
holds in the composite unit base.

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.

UNIT WEIGHT

lb kg X Y Z

UNIT HEIGHT

IN. (MM)

”A”

Fig. 3—604B 042-060 Unit Dimensions

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 rigging holds.

6. Attach field-supplied clevis or hook of sufficient strength to
hole in the lifting bracket. (See Fig. 9)

—4—

C00161

CENTER OF GRAVITY

IN. (MM)

12

y

43

CORNER WEIGHTS (SMALL CABINET) CORNER WEIGHTS (LARGE CABINET)

Unit 24 30 36

Total Weight 350 350 373 Total Weight 440 463 499

Corner Weight 1 70 70 75 Corner Weight 1 88 98 107
Corner Weight 2 54 54 58 Corner Weight 2 68 61 70

Model 604B

7. Attach the 2 safety straps directly to the clevis or hook at the

8. Position lifting point directly over the unit’s center of

9. Lift unit. When unit is directly over the roof curb, remove

10. After the unit is placed on the roof curb or mounting pad,

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 ordi­nances.

Select and size ductwork, supply-air registers, and return air grilles
according to ASHRAE (American Society of Heating, Refrigera­tion, 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:

Corner Weight 3 84 84 90 Corner Weight 3 106 127 136
Corner Weight 4 141 141 150 Corner Weight 4 177 177 186

Fig. 4—Corner Weights

4 rigging brackets. DO NOT attach the safety straps to the
lifting brackets. (See Fig. 9)

gravity.

the 2 safety straps. Lower the equipment onto the roof curb.

remove the top crating. On 604B060 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.

x

C00071

Unit 42 48 60

Model 604B

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—

HVAC unit

Scre w

(NO TE A)

base

Gask eting

inner flange*

HVAC unit

Scre w

(NOTE A)

base

Gask eting

inner flange*

*Gask eting

outer flange

Wood nailer*

Flashing field

supplied

Roofing material

field supplied

Cant str ip

field supplied

*Provided with roofcurb

Roofcurb*

Insulation (field

supplied)

Duct wo rk

field supplied

Roof

Roof Curb for Small Cabinet

Note A: When unit mounting scre w is used,

retainer bra cke t must also be used.

Supply opening
(B x C)

*Gask eting

outer flange

Wood nailer*

Flashing field

supplied

Roofing material

field supplied

Cant str ip

field supplied

*Provided with roofcurb

Roofcurb*

Insulation (field

supplied)

Duct wo rk

field supplied

Roof

Roof Curb for Large Cabinet

Note A: When unit mounting scre w is used,

retainer bra cket must also be used.

B Ty p.

5

/16"

44

C Typ.

D

R/A

A

Gask et around

S/A

duct

Short

Insulated

Return opening

(B X C)

deck pan

Long

Support

UNIT SIZE ODS CATALOG NUMBER

604B024-036

604B042-060

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.

CPRFCURB006A00 8 (203) 11(279) 161/2 (419) 28-3/4 (730)
CPRFCURB007A00 14 (356) 11(279) 161/2 (419) 28-3/4 (730)
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)

Support

A

IN. (MM)

Fig. 5—Roof Curb Dimensions

B

IN. (MM)

Insulated
deck pan

Gask et around

outer edge

C

IN. (MM)

C00076

D

IN. (MM)

—6—

A

B

C

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C A-C

1/4 1/4 1/4

C99065

Fig. 6—Unit Leveling Tolerances

OPTIONAL

RETURN

AIR

OPENING

2"

EVAP. COIL COND. COIL

Fig. 7—Slab Mounting Detail

HOOK

Fig. 8—Threading Belt

5. Secure all ducts to building structure. Flash, weatherproof,
and vibration-isolate duct openings in wall or roof accord­ing 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.

3. Use a screwdriver and hammer to remove the panels in the
bottom of the unit base.

NOTE: These panels are held in place with tabs similar to an
electrical knockout.

OPTIONAL

SUPPLY

AIR

OPENING

C99096

HANDHOLD

FEED

C99067

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 604B 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
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

—7—

914-137"

“A”

“B”

INSTALL SAFETY STRAPS TO
RIGGING CLEVIS AT 4 RIGGING BRACKETS

PLACE RIGGING BRACKET ASSEMBLY IN 4
RIGGING HOLES AND INSTALL TIE DOWN STRAP
AROUND PERIMETER OF UNIT AND THROUGH

SEE DETAIL A

UNIT MAXIMUM SHIPPING WEIGHT A B

Size lb kg in. mm. in. mm.
604B024 372 169 19.0 482.6 18.25 463.6
604B030 372 169 19.0 482.6 18.25 463.6
604B036 395 179 20.0 508 19.0 482.6
604B042 462 210 20 508 21.25 539.8
604B048 485 220 20.0 508 21.25 539.8
604B060 521 236 21.0 533.4 20.0 508.0

SPACE IN BRACKET ASSEMBLY

(36"-54")

SCALE 0.250

TIGHTEN STRAPPING SECURELY
WITH TENSION BUCKLE

DETAIL A

Fig. 9—Suggested Rigging

C99075

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 field­supplied 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 pos­sibility 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 compart­ment, or conduit approved for electrical ground when
installed in accordance with NEC, ANSI/NFPA Ameri­can National Standards Institute/National Fire Protection
Association (latest edition) (in Canada, Canadian Electri­cal Code CSA C22.1) and local electrical codes. Failure
to adhere to this warning could result in serious injury or
death.

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 con­tained 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, con­duit, etc.

—8—

TABLE 1—PHYSICAL DATA—UNIT 604B

UNIT SIZE 604B024 604B030 604B036 604B042 604B048 604B060

NOMINAL CAPACITY (ton) 2 2.5 3 3.5 4 5

OPERATING WEIGHT (lb.) 350 350 373 440 463 499

COMPRESSOR QUANTITY 1

TYPE SCROLL COMPRESSOR

REFRIGERANT R-410A

REFRIGERANT METERING DEVICE

Refrigerant (R-410A) Quantity (lb.) 7.5 8.0 9.5 10.8 11.5 14.0

METERING DEVICE

Nominal Airflow (CFM)

INDOOR BLOWER

Nominal Airflow (CFM)

HIGH-PRESSURE SWITCH (psig)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

* 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.

(Liquid Line) (psig)

RETURN-AIR FILTERS (in.)*

ID

ORIFICE OD (in.) 0.035 (2) 0.035 (2) 0.038 (2) 0.038 (2)

OUTDOOR COIL

Rows... Fins/in.

face area (sq. ft.)

OUTDOOR FAN

Diameter

Motor HP (RPM)

INDOOR COIL

Rows... Fins/in.

face area (sq. ft.)

Size (in.)

Motor (HP)

Cutout

Reset (Auto)

Cutout

Reset (Auto)

throwaway

TXV TXV TXV TXV TXV TXV

2...21

12.3

2350

22

1/8 (825)

3...15

3.7

800

10x10

1/2

20x20x1 “ 20x24x1 “ 24x30x1 24x30x1

2...21

12.3

2350

22

1/8 (825)

3...15

3.7

1000

10x10

1/2

2...21

13.6

2800

22

1/8 (825)

4...15

3.7

1100

11x10

3/4

Indoor-TXV

Outdoor-Accurater

0.038 (Left OD Coil)

0.046 (Right OD Coil)

2...21

15.4

2800

22

1/8 (825)

3...15

4.7

1400

11x10

3/4

610±15
420±25

20±5

45±10

2...21

17.2

3300

22

1/4 (1100)

4...15

4.7

1450

11x10

3/4

0.042 (Left OD Coil)

0.052 (Right OD Coil)

2...21

19.4

3300

22

1/4 (1100)

4...15

5.7

1750

11x10

1.0

TABLE 2—MINIMUM AIRFLOW FOR RELIABLE ELECTRIC HEATER OPERATION (CFM)

SIZE 604B024 604B030 604B036 604B042 604B048 604B060

AIRFLOW (CFM) 750 1025 1250 1285 1710 1800

A. HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a field­supplied, 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 Instruc­tions provided with the accessory for electrical service connec­tions.

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 high­voltage 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 17). For single­phase units, connect leads to the black and yellow wires; for
3-phase units, connect the leads to the black, yellow, and blue
wires.

C. CONNECTING GROUND LEAD TO GROUND LUG

Refer to Fig. 16 and 17. 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. 16.

The unit transformer supplies 24-v power for complete system
including accessory electrical heater. An automatic-reset circuit
breaker (See Fig. 18) is provided in the 24-v circuit; see the caution
label on the transformer or Fig. 19. 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.

—9—

RETURN
AIR

INDOOR
THERMOSTAT

TOP COVER

FROM
POWER
SOURCE

DISCONNECT
PER NEC*

*NEC - NATIONAL ELECTRICAL CODE

C00063

Fig. 10—Typical Installation

E. Easy Select™—604B

EASY SELECT™ CONFIGURATION TAPS FOR 604B

Easy Select™ taps are used by the installer to configure a system.
The ECM motor uses the selected taps to modify its operation to
a pre-programmed table of airflows.
The unit must be configured to operate properly with system
components with which it is installed. To successfully configure a
basic system (see information printed on circuit board label located
next to select pins), move the 6 select wires to the pins which
match the components used.

a. AUX HEAT kW/CFM—SELECT HEATER RANGE

FOR SIZE OF ELECTRIC HEATER INSTALLED

Duct Covers

Fig. 11—604B with Duct Covers On

Installer must select the auxiliary heat airflow approved
for application with kW size heater installed. If no heater
is installed, this step can be skipped. Each select pin is
marked with a range of heaters for which airflow (also
marked), is approved. For increased comfort, select the
narrowest kW range matching the heater size, for ex­ample, 0–10 for 10–kW heater. This airflow must be
greater than the minimum for CFM for electric heater
application with the size system installed for safe and
continuous operation. (See Tables 4A, 4B, 4C,5&6for
airflow delivery and minimum CFM.) Note that airflow
marked is the airflow which will be supplied in emer-

—10—

C00092

1” (25mm) MIN.

Fig. 12—Condensate Trap

TABLE 3—ELECTRICAL DATA—604B

UNIT 604B

SIZE

024 208/230–1–60 187 253 13.5 61.0 0.9 4.3

030 208/230–1–60 187 253 15.9 73.0 0.9 4.3

036

042

048

060

V-PH-HZ

208/230–1–60 187 253 16.9 83.0 0.9 6.8

208/230–3–60 187 253 12.2 77.0 1.6 6.8

208/230–1–60 187 253 22.4 105.0 0.9 6.8

208/230–3–60 187 253 15.4 88.0 0.9 6.8

208/230–1–60 187 253 21.3 109.0 1.6 6.8

208/230–3–60 187 253 14.7 91.0 1.6 6.8

208/230–1–60 187 253 26.9 145.0 1.5 9.1

208/230–3–60 187 253 17.6 123.0 1.5 9.1

VOLTAGE

RANGE

Min Max RLA LRA Nominal Kw* FLA UNIT MCA MAX FUSE OR CKT BKR MOCP

COMPRESSOR

ODFM

FLA

IDFM

FLA

TRAP
OUTLET

2” (50mm) MIN.

ELECTRIC HEAT SINGLE POINT POWER SUPPLY

-/-

3.8/5.0

5.4/7.2

7.5/10.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

5.4/7.2

7.5/10.0

11.3/15.0

15.0/20.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-/-

18.1/20.8
26/30

36.1/41.7

-/-

18.1/20.8
26/30

36.1/41.7

54.2/62.5

-/-

18.1/20.8
26/30

36.1/41.7

54.2/62.5

-/-

10.4/12.0

20.8/24.1

31.3/36.1

-/-

18.1/20.8
26/30

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-/-

18.1/20.8
26/30

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-/-

18.1/20.8
26/30

36.1/41.7

54.2/62.5

72.2/83.3

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

22.1/22.1

44.6/48.1

54.6/59.6

67.2/74.2

25.1/25.1

47.6/51.1

57.6/62.6

70.2/77.2

92.8/103.2

28.8/28.8

51.4/54.9

61.3/66.3

74.0/80.9

96.5/107.0

23.7/23.7

36.7/38.7

49.7/53.7

62.7/68.8

35.7/35.7

58.3/61.7

68.2/73.2

80.8/87.8

103.4/113.8

126.0/139.9

27.0/27.0

40.0/42.0

53.0/57.0

66.0/72.1

78.9/86.9

35.0/35.0

57.6/61.1

67.5/72.5

80.2/87.1

102.7/113.2

125.3/139.2

26.8/26.8

39.8/41.8

52.8/56.8

65.9/71.9

78.7/86.7

44.2/44.2

66.8/70.3

76.7/81.7

89.4/96.3

111.9/122.4

134.5/148.4

32.6/32.6

45.6/47.6

58.7/62.7

71.7/77.7

84.6/92.6

30/30
60/60

—
—

30/30

—
—
—
—

35/35

—
—
—

—
30/30
50/50
60/60

—
45/45

—

—

—

—

—
35/35
60/60

—

—

—
45/45

—

—

—

—

—
35/35
60/60

—

—

—
60/60

—

—

—

—

—
40/40
60/60

—

—

—

C99013

—

—
70/70
80/80

—
60/70
70/80
80/90

100/110

—
70/70
80/80
90/90

100/110

—

—

—
70/80

—
80/80
90/90

100/100
125/125
150/150

—

—
70/70
80/80

90/100

—
80/80
90/90

100/100
125/125
150/150

—

—
70/70
80/80
90/90

—

90/100
100/110
110/125
150/150
150/175

—

—
70/70
80/80
90/90

gency heat mode and heating mode on air conditioners
when electric heat is the primary heating source. In heat
pump heating mode when electric heaters are energized,
the ECM will run the higher of heat pump heating
airflow and electric heater airflow to ensure safe heater
operation. The factory selection is the largest heater
range approved (See Fig. 20, A as indicated).

b. AC/HP SIZE—SELECT SYSTEM SIZE INSTALLED

The factory setting for air conditioner or heat pump size
is the size which matches the model of packaged unit
installed. Installer should verify air conditioner or heat
pump size to ensure that airflow delivered falls within

proper range for the size unit installed. This applies to all
operational modes with the exception of electric heat
modes (See Fig. 20, B as indicated).

c. SYSTEM TYPE—SELECT SYSTEM TYPE IN-

STALLED
The type of system will be factory selected (see below

for details):
(1.) AC-Air conditioner

—11—

LEGEND

FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA -- Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps

NO TES:

1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NE C
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 break er.

2. Minimum wire size is based on 60 C copper wire. I f other than
60 C wire is used, or if length exceeds wire length in table,
determine siz e from NEC..

3. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt­age is greater than 2%.

the percentage of voltage imbalance.
% Voltage imbalance

= 100 x

Heater capacity (kW) based on heater voltage of 208v & 240v.
If power distibution voltage to unit varies from rated heater

*

voltage, heater kW will vary accordingly.

max voltage deviation from average voltage

Use the following formula to determine

average voltage

®

Fig. 13—Electrical Data Legend

(2.) HP-COMFORT—Heat Pump Comfort provides ap-

proximately 315 CFM per ton for higher normal
heating air delivery temperature and provides ap­proximately 350 CFM per ton cooling airflow for
good humidity removal.

(3.) HP-EFF (Factory Selected for 604B)— Heat Pump

Efficiency provides same airflow for heating and
cooling modes to increase overall HP efficiency;
approximately 350 CFM per ton.

d. AC/HP CFM ADJUST—SELECT NOMINAL, LOW,

OR HIGH AIRFLOW
The AC/HP CFM Adjust select is factory set to the

High-Hi (NOM for 060) tap. The CFM Adjust selections
NOM/LO will regulate airflow supplied for all opera­tional modes, except non-heat pump heating modes. HI
provides 15 percent airflow over nominal unit size
selected and LO provides 10 percent airflow below
nominal unit size selected. CFM Adjust selection op­tions are provided to adjust airflow supplied to meet
individual installation needs for such things as noise,
comfort, and humidity removal (See Fig. 20, D as
indicated).

e. ON/OFF DELAY—SELECT DESIRED

TIME DELAY PROFILE
Four motor operation delay profiles are provided to

customize and enhance system operation (See Fig. 20, E
as indicated).
Selection options are:

(1.) The standard 90 sec off delay (Factory Setting) at

100 percent airflow in cooling or heat pump heating
mode.

(2.) A 30 sec cooling delay with no airflow, 90 sec off

delay at 100 percent airflow profile is used when it
is desirable to allow system coils time to heat­up/cool-down in conjunction with the airflow in
cooling or heat pump heating mode.

EXAMPLE: Supply voltage is 230-3-60.

Determine maximum deviation from average voltage.

(AB) 229 ­(BC) 231 -

(AC) 229 ­Maximum deviation is 2 v.
Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

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.

AB = 228 v
BC = 231 v
AC = 227 v

Average Voltage =

228 =1v
229 =2v
227 =2v

= 0.8%

229

=
= 229

2

228 + 231 + 227

3

686

3

C03014

(3.) A no delay option used for servicing unit or when a

thermostat is utilized to perform delay functions.

(4.) ENH, enhanced selection, provides a 30 sec cooling

on delay with no airflow, plus 150 sec at 70 percent
airflow and no off delay for added comfort.
This will minimize cold blow in heat pump opera­tion and could enhance system efficiency.

f. CONTINUOUS FAN—SELECT DESIRED FAN

SPEED WHEN THERMOSTAT IS SET ON CON­TINUOUS FAN

(1.) LO speed—Factory setting, 50 percent cooling

mode airflow.

(2.) MED speed—Move connector to MED, 65 percent

cooling mode airflow.

(3.) HI speed—Move connector to HI, 100 percent

cooling mode airflow (See Fig. 20, F as indicated).

g. LOW-VOLTAGE CIRCUIT FUSING AND REFER-

ENCE
The low-voltage circuit is fused by a board-mounted

5–amp automotive fuse placed in series with the trans­former SEC2 and the R circuit. The C circuit of the
transformer is referenced to chassis ground through a
printed circuit run at SEC1 connected to metal standoff
marked with ground symbol.

h. BASIC UNIT CONFIGURATION

The following basic configuration of the indoor motor
will provide ARI rated performance of the System. This

BASIC CONFIGURATION should be used when the
rated ARI performance is required, or if system enhance­ments such as super dehumidify are not needed.

(1.) AUX HEAT kW/CFM-Select the heater range for

the size of electric heater installed (skip this step if
no heater is installed).

(2.) AC/HP SIZE-Factory selected to match system size

installed, please verify.

—12—

C03005

Fig. 14—Wiring Schematics-604B Single Phase

—13—

1

3
2

Fig. 15—Wiring Schematics-604B Three Phase

C03006

—14—

HIGH VOLT AGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

POWER
SUPPLY

FIELD-SUPPLIED
FUSED DISCONNECT

BLK(DH)
YEL(Y)

GRN(G)
RED(R)

BRN(C)

WHI(W1)
GRA(W2)
ORN(0)

DHUM

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

Field Control-Voltage Wiring
Field High-Voltage Wiring

GND

SPLICE BOX

LEGEND

Fig. 16—High and Control Voltage Wiring Connections

GROUND LUG

(IN SLPICE BOX)

GROUND

LEAD

Y
G
R
C

W1
W2

O

THERMOSTAT
(TYPICAL)

C01028

SINGLE-PHASE

L1
CONNECTIONS
TO DISCONNECT
PER NEC

3-PHASE
CONNECTIONS

L2

L3

NOTE: Use copper wire only.

LEGEND
NEC – National Electrical Code

Field Wiring
Splice Connections

Fig. 17—Line Power Connections

(3.) SYSTEM TYPE-Factory selected HP-EFF (for unit

604B).

(4.) AC/HP CFM ADJUST-Select HIGH for 042 &

048, NOM for 036 & 060, and LO for 024 & 030.
(5.) ON/OFF DELAY-Select 0/90 profile.
(6.) CONTINUOUS FAN-Select desired fan speed

when thermostat is set to continuous fan.

i. COMFORT OPTIONS—SUPER DEHUMIDIFY (See

Quick Reference Guide)
The Super Dehumidify option is possible when this unit

is installed with a field supplied Thermidistat™ control
(Super Dehumidify does not require an outdoor tempera­ture sensor). The following configuration is recom­mended for maximum cooling/dehumidifying comfort:
This configuration will improve the comfort provided by
the air conditioning system if more humidity removal is

BLK

YEL

BLU

C99057

24 V Circuit Breaker

24 V olt Compartment

Fig. 18—Control Wiring Plate

desired. While providing this improved comfort, the
system will operate efficiently, but not at the published
HSPF or ARI SEER efficiency.
The following system configuration is recommended for
maximum heating and cooling/dehumidifying comfort
(See Fig. 20–22).

(1.) AUX HEAT kW/CFM-Select the narrowest heater

range to match size of electric heater installed (skip
this step if no heater is installed).

(2.) AC/HP Size-Factory selected to match system size

installed, please verify.

C99070

—15—

TRANSFORMER CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR

IT WILL NOT AUTOMATICALLY RESET
DISCONNECT POWER AND INSTALL

LOCKOUT TAG PRIOR TO SERVICING
THIS COMPARTMENT MUST BE CLOSED

EXCEPT WHEN SERVICING

Fig. 19—Transformer Label

9 PIN CONNECTOR

ICM PRINTED CIRCUIT BOARD

SEC1 SEC2

EASY SELECT

AUX HEAT KW/CFM

0-30

0-20

1075

A

B

C

D

E

F

VIO

BLU

ORN

BLK

WHT

YEL

875

AC/HP SIZE

036 030 024 018

SYSTEM TYPE

AC

AC/HP CFM ADJUST

NOM HI

ON/OFF DELAY

09030900

CONTINUOUS FAN

MED HI YELLO

TM

0-10
725

HP-COMFORT

HP-EFF

LO

0

HEATER/MOTOR

ENH

0-5
625

J1

J2

AUX1 HUM1

AUX2

24VAC

GRY

12 PIN CONNECTOR

Fig. 20—Detail of SPP Printed-Circuit Board

(3.) SYSTEM TYPE-Select system type HP-

COMFORT (for heat pump system) or AC (for air

conditioner system).
(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).
(5.) ON/OFF DELAY-Select ENH profile.
(6.) CONTINUOUS FAN-Select desired fan speed

when thermostat is set to continuous fan.
(7.) DEHUMIDIFY MODE-Remove J1 jumper to acti-

vate.
(8.) LOW VOLTAGE CONNECTIONS-Make connec-

tions as shown in ELECTRICAL CONNECTIONS

section.
(9.) CONFIGURE THERMIDISTAT™ (or capable zon-

ing system)-Following its installation instructions

for Super Dehumidify and Super Comfort Heat

operation.
This configuration provides the following comfort en-

hancements:

(a.) A 30 sec blower on delay with 150 sec at 70

percent airflow to allow the indoor coil to warm
up or cool down before the blower is asked to

HUM2

D
R

W
W
Y
Y/Y
G
O

C

deliver 100 percent airflow reducing the cold
blow sensation at start up in heating and allow­ing the indoor coil to more quickly reach wet
coil operating conditions in cooling.

(b.) A no blower off delay eliminates cold blow

which may be associated with running the
blower after shut down of the compressor and
avoids re-evaporation of condensed moisture
after cooling/dehumidifying operation.

C99058

(c.) Lower airflow while the compressor is running

to reduce draft effects and increase heating air
temperature and improved humidity control
during cooling operation.

ACCESSORY INSTALLATION

a. ACCESSORY ELECTRIC HEATERS

Electric heaters may be installed with the 604B units per
instructions supplied with electric heater package. See
unit rating plate for factory-approved electric heater kits.

b. AUXILIARY TERMINALS

The AUX and HUM terminals on the Easy Select™
Board are tied directly to the G terminal, and provide a
24-v. signal whenever the G terminal is energized (See
Fig. 20). During Super dehumidify mode, the G signal is

H

1
2

1

2

not present and the auxiliary terminals are not energized.
If the installation includes the use of the operating mode,
do not use these terminals to control accessories. See
Electronic Air Cleaner and Humidifier sections for
further information.

c. ELECTRONIC AIR CLEANER CONNECTIONS

The AUX1 and AUX2 terminals are not always ener­gized during blower operations, as described above.
When using an electronic air cleaner with the unit, use
Airflow Sensor (See Air Cleaner Price Pages for part
number). The airflow sensor turns on electronic air
cleaner when the blower is operating.

d. HUMIDIFIER/HUMIDISTAT CONNECTIONS

Easy Select™ Board terminals HUM1 and HUM2 are

C01033

provided for direct connection to the low-voltage control
of a humidifier through a standard humidistat (See Fig.
20–22). These terminals are energized with 24-v. when
G thermostat signal is present. (See Fig. 20–22). Alter­nately, the 24-v. signal may be sourced from the W and
C circuit board connections. When using a Thermidis­tat™ Control, Zone Comfort Plus or Comfort Zone II,
the 24-v. signal may be sourced directly from the
Thermidistat™ HUM terminal.

HUMIDISTAT

HUM 1

(C)

24-VAC

TO HUMIDIFIER

HUM 2

(G)

HUMIDIFIER WIRING

A95317

Fig. 21—Humidifier Wiring for 604B

e. DEHUMIDIFY CAPABILITY WITH STANDARD

HUMIDISTAT CONNECTION
Latent capacities for these units are better than average

systems. If increased latent capacity is an application
requirement, the circuit board provides connection ter­minals for use of a standard humidistat. The unit will
detect the humidistat contacts opening on increasing

—16—

EASY SELECT

BOARD TERMINAL

BLOCK

D

J1

REMOVE

JUMPER

H

HUMIDISTAT

R

A95316

Fig. 22—Humidistat Wiring for De-Humidify Mode-for

604B

humidity and reduce its airflow to approximately 80
percent of nominal cooling mode airflow. This reduction
will increase the system latent capacity until the humid­ity falls to a level which causes the humidistat to close its
contacts. When the contacts close, the airflow will return
to 100 percent of selected cooling airflow. To activate
this mode, remove jumper J1 and wire in a standard
humidistat (See Fig. 20–22).

f. DEHUMIDIFY AND SUPER DEHUMIDIFY CAPA-

BILITIES
these models are capable of responding to a signal from

indoor system control (thermostat, Thermidistat™, zon­ing control) to operate in comfort control modes such as
Super Dehumidify Mode. Consult literature provided
with indoor system control to determine if these operat­ing modes are available, and to see control set up
instructions. No special setup or wiring of unit is
required.

F. 604B Sequence Of Operation

a. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G—The Blower runs

at continuous fan airflow.

b. COOLING MODE-LOW HUMIDITY

(1.) If indoor temperature is above temperature set point

and humidity is below humidity set point, thermo­stat closes circuits R to G, R to Y/Y2 and R to
O—The unit delivers cooling airflow.

c. COOLING MODE-DEHUMIDIFICATION

(1.) If indoor temperature is above temperature set point

and humidity is above humidity set point, thermo­stat or Thermidistat™ closes circuits R to G, R to O,
and R to Y/Y2 and humidistat or Thermidistat™
opens R to DH—The unit delivers airflow which is
approximately 80 percent of the nominal cooling
airflow to increase the latent capacity of the system.

d. COOLING MODE-SUPER DEHUMIDIFY OPERA-

TION (see quick reference guide)

NOTE: The indoor control used, such as a Thermidistat™, must
be capable of providing Super Dehumidify operation mode and
control must be configured as outlined in its installation instruc­tions. Consult indoor control literature to determine if control is
capable of providing Super Dehumidify inputs and for configura­tion instruction.

(1.) If the indoor temperature is below the temperature

set point and the humidity is above the humidity set
point, the Thermidistat™ closes circuit R to O,
opens circuits R to DH and R to G, and cycles
circuit R to Y/Y2. If circuit R to G is closed (24-v.),

the motor will deliver airflow at the full cooling or
cooling plus dehumidify mode requested value. If
circuit R to G is open (0–v.) for super dehumidify
mode, the motor delivers reduced airflow to maxi­mize the humidity removal of the system while
minimizing over cooling.

e. ELECTRIC HEATING MODE

(1.) Thermostat closes circuit R to W/W1, or W2—The

unit delivers the selected electric heat airflow. There
are no on or off delays.

f. HEAT PUMP HEATING MODE

(1.) Thermostat closes circuits R to G and R to

Y/Y2—The unit delivers selected heat pump heat­ing airflow.

g. HEAT PUMP HEATING WITH AUXILIARY

ELECTRIC HEAT
(1.) Thermostat closes circuits R to G, R to Y/Y2 and R

to W/W1 or W2 (and R to O in the case of defrost).

In the event that electric heating is called for by the
thermostat while the heat pump is also operating in
either heating or defrost modes, the motor will modify its
airflow output, if necessary, to provide an airflow which
is defined as safe for the operation of the electric heater
during heat pump operation. That airflow is the greater
of the heat pump heating airflow and the electric heater
only airflow.

h. HEATING MODE—SUPER COMFORT HEAT OP-

ERATION

NOTE: The indoor control used, such as a Thermidistat™, must
be capable of providing Super Comfort Heat operation mode and
control must be configured as outlined in its installation instruc­tions. The system must be installed with appropriate outdoor
temperature sensor. Consult indoor control literature to determine
if control is capable and for configuration instructions. Consult
indoor control instructions and sensor instructions for sensor
installation details.

If the outdoor temperature is in the range of 12° to 40° F, the
Thermidistat™ closes circuit R to Y/Y2 and opens circuit R to G.
If circuit R to G is closed (24-v.), the motor will deliver airflow at
the full heating requested value. If circuit R to G is open (0-v.) for
maximum heating comfort, the motor delivers reduced airflow to
maximize the temperature and minimize the draft effect of the
heated air leaving the unit.

G. 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. 14 or 15 and

18)

3. Connect the yellow primary lead (w 110) to the transformer
terminal labeled 200-v.

—17—

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 dis­turbing 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 refrig­erant leak. Leak-test all refrigerant tubing connections
using electronic leak detector, or liquid-soap solution. If
a refrigerant leak is detected, see following Check for
Refrigerant Leaks section.

c. Inspect all field and factory-wiring connections. Be sure

that connections are completed and tight.

d. 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.

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 dis­charge line. Be sure that caps on the ports are tight.

MOTOR

1/8" MAX BETWEEN
MOTORAND FAN HUB

MOTOR SHAFT

FAN GRILLE

1/2˝

C99009

Fig. 23—Fan Blade Clearance

START-UP

I. 604B: START-UP

CHECKING COOLING AND HEATING CONTROL OPERA­TION– 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 according to time delay
selected on the Easy Select™ board (See Easy
Select Section) when FAN MODE switch is placed
in AUTO position.

(2.) Thermostat:

When the room temperature rises to a point that is
slightly above the cooling control setting of the
thermostat, the thermostat completes the circuit
between thermostat terminal R to terminals Y, O
and G. These completed circuits through the ther­mostat connect contactor coil (C) (through unit wire
Y) and ECM board (through unit wire G) across the
24-v. secondary of transformer (TRAN).

Thermidistat™ or Thermostat and Humidistat:

When the room temperature rises to a point that is
slightly above the cooling control setting of the
thermostat, the thermostat completes the circuit
between thermostat terminal R to terminals Y, O,
DH, and G. These completed circuits through the
thermostat connect contactor coil (C) (through unit
wire Y) and ECM board (though unit wire G) across
the 24-v. secondary of transformer (TRANS).

(3.) Place system switch or MODE control in HEAT

position. Set control above room temperature. Ob­serve that compressor, outdoor fan, and indoor
blower motors start. Observe that heating cycle
shuts down according to time delay selected on the
Easy Select™ board (See Easy Select Section)
when control setting is satisfied.

(4.) When using an automatic changeover room thermo-

stat, 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).

NOTE: Once the compressor has started and then has stopped, it
should not be started again until 5 minutes have elapsed. The
cooling cycle remains ‘‘on’’ until the room temperature drops to
point that is slightly below the cooling control setting of the room
thermostat. At this point, the thermostat ‘‘breaks’’ the circuit

—18—

OUTDOOR COIL

HP S

ACCUMULATOR

COMPRESSOR

LEGEND

HPS – High Pressure Switch
LCS – Loss of Charge Switch

Accurater

®

Metering De vice

Arrow indicates direction of flo w

Fig. 24—Typical Heat Pump Operation, Cooling Mode

between thermostat terminal R to terminals Y and G. These open
circuits de-energize contactor coil C and ECM board. The
condenser and compressor motors stop. After the time delay
setting selected on the Easy Select™ board (See Easy Select
Section) , the blower motor stops. The unit is in a ‘‘standby’’
condition, waiting for the next ‘‘call for cooling’’ from the room
thermostat. The 5 minute compressor delay also applies to heat
pump heating mode.

II. 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 volumetric­charging cylinder or accurate scale. Refer to unit rating
plate for required charge.

III. 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 OP­ERATION

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.

INDOOR COIL

TXV in Metering

Position

LCS

Bypass

Position

C03011

2. Place system switch or MODE control in HEAT position.
Set control above room temperature. Observe that compres­sor, outdoor fan, and indoor blower motors start. Observe
that heating cycle shuts down when control 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 indi­cated adjustment to the specified factory charge must always be

—19—

ACCUMULATOR

HP S

OUTDOOR COIL

TXV in Bypass

Position

LCS

INDOOR COIL

COMPRESSOR

LEGEND

HPS – High Pressure Switch
LCS – Loss of Charge Switch

®

Accurater

Metering De vice

Arrow indicates direction of flo w

Fig. 25—Typical Heat Pump Operation, Heating Mode

TABLE 4A—604B COOLING & HEATING DRY COIL ECM AIRFLOW

CFM ADJUST

UNIT

SIZE

024

030

036

† Heat Pump Efficiency and Cooling pin selections deliver equal airflow

PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING † 800 725 – 885 805 730 990 930 855

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

COOLING † 1010 920 825 1105 1030 930 1255 1160 1050

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

COOLING † 1110 1025 970 1235 1175 1115 1400 1355 1280

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0 0.0–0.39 0.4–0.69 0.7–1.0

715 670 – 715 695 645 795 775 745

720 660 – 790 745 685 890 850 785

890 845 795 890 865 825 1010 980 925

945 850 765 1020 965 895 1140 1105 995

990 960 910 990 975 940 1125 1110 1085

1035 975 910 1160 1080 1020 1305 1275 1220

LO PIN NOM PIN HI PIN

SMALL CABINET

Metering

Position

C03012

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.

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 evacu­ating system, weigh in the specified amount of refrigerant (refer to
system data plate).

E. LOW CHARGE COOLING

Use Cooling Charging Chart (Fig. 27). Vary refrigerant until the
conditions of the chart are met. Note that charging charts are
different from type normally used. Charts are based on charging
the units to correct subcooling for the various operating conditions.
Accurate pressure gauge and temperature sensing devices are

required. Connect the pressure gauge to the service port on the
suction line. Mount the temperature sensing device on the suction
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 liquid line temperature and read the manifold pressure
gauges. Refer to the chart to determine what the liquid line
temperature should be.

NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.

—20—

TABLE 4B—604B COOLING & HEATING DRY COIL ECM AIRFLOW

LARGE CABINET

CFM ADJUST

UNIT
SIZE

042

048

060

† Heat Pump Efficiency and Cooling pin selections deliver equal airflow

PIN SELECT

EXTERNAL STATIC

PRESSURE RANGE

COOLING † 1100 1225 1410

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

COOLING † 1260 1400 1610

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

COOLING † 1575 1750 2010

COOLING

DEHUMIDIFY

HEAT PUMP

COMFORT

LO PIN NOM PIN HI PIN

0.1–1.0 0.1–1.0 0.1–1.0

980 980 1125

990 1100 1265

1120 1120 1290

1135 1260 1450

1400 1400 1610

1415 1575 1810

TABLE 4C—ECM WET COIL PRESSURE DROP (IN. WG)

UNIT
SIZE

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100

024 0.005 0.007 0.010 0.012 0.015 –––––––––––
030 – 0.007 0.010 0.012 0.015 0.018 0.021 0.024 ––––––––
036 – – – 0.019 0.023 0.027 0.032 0.037 0.042 0.047 ––––––
042 ––––0.014 0.017 0.020 0.024 0.027 0.031 0.035 0.039 0.043 – – –
048 ––––––0.027 0.032 0.036 0.041 0.046 0.052 0.057 0.063 0.068 –
060 –––––––––0.029 0.032 0.036 0.040 0.045 0.049 0.053

STANDARD CFM (SCFM)

TABLE 5—FILTER PRESSURE DROP TABLE (IN. WG)

FILTER SIZE

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

500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

CFM

TABLE 6—ELECTRIC HEAT PRESSURE DROP TABLE

SMALL CABINET: 024-036 - CFM

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

7.5 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09
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

G. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

Unit 604B utilizes state of the art ECM (Electronic Computated
Motor) ID Blower Motors.

CAUTION: For heating and cooling operation, the rec­ommended 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.

IV. 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

Tables 4A & 4B show both heating and cooling airflows. Refer to
these tables to determine the airflow for the system being installed.
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 set up pins on the Easy
Select™ board.

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. Revers­ing 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

—21—

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

7.5 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
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

Balance Point Worksheet

70

Based on Entering Indoor Air of 70 Deg. F and Rated CFM

60

50

40

1000BTUH

30

20

Building Heat Loss, 1000BTUH

Unit Intetgrated Heating Capacity,

10

0

-20 -10 0 10 20 30 40 50 60

Outdoor Air Temp (Deg F)

060
048
042
036
030
024

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).
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

Fig. 26—604B Balance Point Worksheet

—22—

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 com­pressor 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. 28) Tape to prevent grounding.

3. Restart unit in Heating mode, allowing frost to accumulate
on outdoor coil.

4. After a few minutes in Heating mode, liquid line tempera­ture should drop below closing point of defrost thermostat
(approximately 30°F).

NOTE: Unit will remain in defrost until defrost thermostat
reopens at approximately 80°F coil temperature at liquid line or
remainder of defrost cycle time.

C03008

Required Subcooling oF (oC)

Outdoor Ambient Temperature

Model Size

024 10.3 ( 5.7 ) 9.8 ( 5.4 ) 9.4 ( 5.2 ) 9 ( 5 ) 8.6 ( 4.7 ) 189 61 56 51 46 41 1303 16 13 11 8 5
030 9.3 ( 5.2 ) 8.8 ( 4.9 ) 8.6 ( 4.8 ) 7.8 ( 4.3 ) 7 ( 3.9 ) 196 63 58 53 48 43 1351 17 15 12 9 6
036 17.6 ( 9.8 ) 16.8 ( 9.3 ) 16.5 ( 9.2 ) 15.4 ( 8.6 ) 14.3 ( 7.9 ) 203 66 61 56 51 46 1399 19 16 13 10 8
042 12.8 ( 7.1 ) 12.7 ( 7.1 ) 12.7 ( 7.1 ) 12.6 ( 7 ) 12.6 ( 7 ) 210 68 63 58 53 48 1448 20 17 14 11 9
048 17.5 ( 9.7 ) 16.9 ( 9.4 ) 16.6 ( 9.2 ) 15.7 ( 8.7 ) 14.8 ( 8.2 ) 217 70 65 60 55 50 1496 21 18 15 13 10
060 13.7 ( 7.6 ) 13 ( 7. 2 ) 13 ( 7.2 ) 14.5 ( 8. 1 ) 11.5 ( 6.4 ) 224 72 67 62 57 52 1544 22 19 16 14 11

1- Measure Discharge line pressure by attaching a gauge to the servi ce por t .
2- Measure the Liquid line temperature by attachi ng a t em per at ur e sensi ng

device to it.
3- Insulate the temperature sensing device so that t he O ut door Ambient

doesn’t affect the reading.
4- Refer to the required Subcooling in the tabl e based on the m odel size and

the Outdoor Ambient temperature.
5- Interpolate if the Outdoor ambi ent temperature lies in between the table

values. Extrapolate if the temperatur e l ies beyond the table range.
6- Find the Pressure Value in the table corresponding to t he t he m easured

Pressure of the Compressor Discharge line.
7- Read across from the Pressure reading to obtain the Liqui d l i ne

temperature for a required Subcooling
8- Add Charge if the measured temperature is higher than t he t abl e val ue.

50XZ500174

75 (24) 82 (28) 85 (29) 95 (35) 105 (41)

Charging Procedure

Pressure

(psig)

231 74 69 64 59 54 1593 23 20 18 15 12
238 76 71 66 61 56 1641 24 21 19 16 13
245 77 72 67 62 57 1689 25 22 20 17 14
252 79 74 69 64 59 1737 26 23 21 18 15
260 81 76 71 66 61 1792 27 25 22 19 16
268 83 78 73 68 63 1848 29 26 23 20 17
276 85 80 75 70 65 1903 30 27 24 21 19
284 87 82 77 72 67 1958 31 28 25 22 20
292 89 84 79 74 69 2013 32 29 26 23 21
300 91 86 81 76 71 2068 33 30 27 24 22
309 93 88 83 78 73 2130 34 31 28 26 23
318 95 90 85 80 75 2192 35 32 29 27 24
327 97 92 87 82 77 2254 36 33 31 28 25
336 99 94 89 84 79 2316 37 34 32 29 26
345 101 96 91 86 81 2378 38 35 33 30 27
354 103 98 93 88 83 2440 39 36 34 31 28
364 105 100 95 90 85 2509 40 38 35 32 29
374 107 102 97 92 87 2578 41 39 36 33 30
384 108 103 98 93 88 2647 42 40 37 34 31
394 110 105 100 95 90 2716 44 41 38 35 32
404 112 107 102 97 92 2785 45 42 39 36 33
414 114 109 104 99 94 2854 46 43 40 37 34
424 116 111 106 101 96 2923 47 44 41 38 35
434 118 113 108 103 98 2992 48 45 42 39 36
444 119 114 109 104 99 3061 48 46 43 40 37
454 121 116 111 106 101 3130 49 47 44 41 38
464 123 118 113 108 103 3199 50 48 45 42 39
474 124 119 114 109 104 3268 51 48 46 43 40
484 126 121 116 111 106 3337 52 49 47 44 41
494 127 122 117 112 107 3406 53 50 47 45 42
504 129 124 119 114 109 3475 54 51 48 46 43
514 131 126 121 116 111 3544 55 52 49 46 44
524 132 127 122 117 112 3612 56 53 50 47 45
534 134 129 124 119 114 3681 56 54 51 48 45

Required Liquid Line Temperature for a Specif ic Subcooling (R-410A)

Pressure

5 10152025

(kPa)

Required Subcooling (

3681114

Fig. 27—Cooling Charging Table-Subcooling

o

C)Required Subcooling (oF)

C03027

5. Turn off power to outdoor and reconnect fan motor lead to
OF2 on control board after above forced defrost cycle.

MAINTENANCE

To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This heat pump unit should
be inspected at least once each year by a qualified service person.
To troubleshoot unit, refer to Table 7.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.

WARNING: The ability to properly perform mainte­nance on this equipment requires certain expertise, me­chanical skills, tools and equipment. If you do not possess
these, do not attempt to perform any maintenance on this
equipment, other than those procedures recommended in
the User’s Manual. FAILURE TO HEED THIS WARN­ING COULD RESULT IN SERIOUS INJURY OR
DEATH AND POSSIBLE DAMAGE TO THIS EQUIP­MENT.

WARNING: Failure to follow these warnings could
result in serious injury or death:

1. Turn off electrical power to the unit before performing
any maintenance or service on this unit.

2. Use extreme caution when removing panels and parts.
As with any mechanical equipment, personal injury
can result from sharp edges.

3. Never place anything combustible either on, or in
contact with, the unit.

CAUTION: Errors made when reconnecting wires may
cause improper and dangerous operation. Label all wires
prior to disconnecting when servicing.

The minimum maintenance requirements for this equipment are as
follows:

1. Inspect air filter(s) each month. Clean or replace when
necessary.

2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.

4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when neces­sary.

—23—

O R W

2

Y C

SPEEDUP

T2 C C O

DFT

T1 Y

P1

J1

P3

DFT

INTERVAL TIMER

90

OFF

60

30

SHIFT

OF1

OF2

30

120

60

ON

QUIET

Speedup
Pins

I. AIR FILTER
IMPORTANT: Never operate the unit without a suitable air filter

in the return-air duct system. Always replace the filter with the
same dimensional size and type as originally installed. See Table
1 for recommended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during
each cooling season and twice during the heating season, or
whenever the filter becomes clogged with dust and lint.

II. INDOOR BLOWER AND MOTOR
NOTE: All motors are prelubricated. Do not attempt to lubricate

these motors.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.

WARNING: Disconnect and tag electrical power to the
unit before cleaning and lubricating the blower motor and
wheel. Failure to adhere to this warning could cause
personal injury or death.

Quiet
Shift

Fig. 28—Defrost Control

CESO130076–00

Defrost interval
DIP switches

A99442

Straighten bent fins with a fin comb. If coated with dirt or lint,
clean the coils with a vacuum cleaner, using the soft brush
attachment. Be careful not to bend the fins. If coated with oil or
grease, clean the coils with a mild detergent-and-water solution.
Rinse coils with clear water, using a garden hose. Be careful not to
splash water on motors, insulation, wiring, or air filter(s). For best
results, spray condenser coil fins from inside to outside the unit.
On units with an outer and inner condenser coil, be sure to clean
between the coils. Be sure to flush all dirt and debris from the unit
base.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring,
or air filter(s). If the drain trough is restricted, clear it with a
“plumbers snake” or similar probe device.

IV. OUTDOOR FAN

CAUTION: Keep the condenser fan free from all ob-

structions to ensure proper cooling operation. Never place
articles on top of the unit. Damage to unit may result.

III. OUTDOOR COIL, INDOOR COIL, AND CONDEN­SATE DRAIN PAN

Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.
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 the
airflow through the condenser coil.

1. Remove 6 screws holding outdoor grille and motor to top
cover.

2. Turn motor/grille assembly upside down on top cover to
expose fan blade.

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan
off motor shaft.

—24—

5. When replacing fan blade, position blade so that the hub is
1/8 in. away from the motor end (1/8 in. of motor shaft will
be visible). (See Fig. 23)

6. Ensure that setscrew engages the flat area on the motor shaft
when tightening.

7. Replace grille.

V. ELECTRICAL CONTROLS AND WIRING

Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.

Remove access panel to locate all the electrical controls and
wiring. Check all electrical connections for tightness. Tighten all
screw connections. If any smoky or burned connections are
noticed, disassemble the connection, clean all the parts, restrip the
wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical instrumenta­tion. Refer to the unit wiring label when making these checkouts.

VI. REFRIGERANT CIRCUIT

Inspect all refrigerant tubing connections and the unit base for oil
accumulation annually. Detecting oil generally indicates a refrig­erant leak.

If oil is detected or if low performance is suspected, leak-test all
refrigerant tubing using an electronic leak detector, or liquid-soap
solution. If a refrigerant leak is detected, refer to Check for
Refrigerant Leaks section.

If no refrigerant leaks are found and low performance is suspected,
refer to Checking and Adjusting Refrigerant Charge section.

VIII. METERING DEVICES–TXV & ACCURATER PISTON

This unit uses 2 types of metering devices. The outdoor metering
device is a fixed orifice and is contained in the brass hex-body in
the liquid line feeding the outdoor coils. The indoor metering
device is a TXV type device.

IX. PRESSURE SWITCHES

Pressure switches are protective devices wired into control circuit
(low voltage). They shut off compressor if abnormally high or low
pressures are present in the refrigeration circuit. These pressure
switches are specifically designed to operate with Puron (R-410A)
systems. R-22 pressure switches must not be used as replacements
for the Puron (R-410A) system.

X. LOSS OF CHARGE SWITCH

This switch is located on the liquid line and protects against low
suction pressures caused by such events as loss of charge, low
airflow across indoor coil, dirty filters, etc. It opens on a pressure
drop at about 20 psig. If system pressure is above this, switch
should be closed. To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have
continuity on a good switch.

NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch must be removed, remove and recover all system
charge so that pressure gauges read 0 psi. Never open system
without breaking vacuum with dry nitrogen.

XI. HIGH-PRESSURE SWITCH

The high-pressure switch is located in the discharge line and
protects against excessive condenser coil pressure. It opens at 610
psig.

High pressure may be caused by a dirty outdoor coil, failed fan
motor, or outdoor air recirculation.

To check switch:

1. Turn off all power to unit.

2. Disconnect leads on switch.

3. Apply ohm meter leads across switch. You should have
continuity on a good switch.

XII. COPELAND SCROLL COMPRESSOR (PURON RE­FRIGERANT)

The compressor used in this product is specifically designed to
operate with Puron (R-410A) refrigerant and cannot be inter­changed.

The compressor is an electrical (as well as mechanical) device.
Exercise extreme caution when working near compressors. Power
should be shut off, if possible, for most troubleshooting tech­niques. Refrigerants present additional safety hazards.

Fig. 29—Refrigerant Circuit

VII. INDOOR AIRFLOW

The heating and/or cooling airflow does not require checking
unless improper performance is suspected. If a problem exists, be

sure that all supply- and return-air grilles are open and free from
obstructions, and that the air filter is clean. When necessary, refer

to Indoor Airflow and Airflow Adjustments section to check the
system airflow.

C99097

WARNING: Wear safety glasses and gloves when han­dling refrigerants. Keep torches and other ignition
sources away from refrigerants and oils. Failure to follow
this warning can cause a fire, serious injury, or death.

The scroll compressor pumps refrigerant throughout the system by
the interaction of a stationary and an orbiting scroll. The scroll
compressor has no dynamic suction or discharge valves, and it is
more tolerant of stresses caused by debris, liquid slugging, and
flooded starts. The compressor is equipped with an anti-rotational
device and an internal pressure relief port. The anti-rotational
device prevents the scroll from turning backwards and replaces the

—25—

need for a cycle protector. The pressure relief port is a safety
device, designed to protect against extreme high pressure. The
relief port has an operating range between 550 and 625 psi
differential pressure.

The Copeland scroll compressor uses Mobil 3MA POE oil.
This is the only oil allowed for oil recharge.

XIII. REFRIGERANT SYSTEM

This step covers the refrigerant system of the 604B, including the
compressor oil needed, servicing systems on roofs containing
synthetic materials, the filter drier and refrigerant charging.

A. Refrigerant

CAUTION: This system uses Puron (R-410A) refriger-

ant which has higher operating pressures than R-22 and
other refrigerants. No other refrigerant may be used in
this system. Gauge set, hoses, and recovery system must
be designed to handle Puron. If you are unsure consult the
equipment manufacturer. Failure to use Puron compatible
servicing equipment or replacement components may
result in property damage or injury.

B. Compressor Oil

The compressor in this system uses a polyolester (POE) oil, Mobil
3MA POE. This oil is extremely hygroscopic, meaning it absorbs
water readily. POE oils can absorb 15 times as much water as other
oils designed for HCFC and CFC refrigerants. Take all necessary
precautions to avoid exposure of the oil to the atmosphere.

C. Servicing Systems on Roofs with Synthetic Materi­als

POE (polyolester) compressor lubricants are known to cause long
term damage to some synthetic roofing materials.

Exposure, even if immediately cleaned up, may cause embrittle­ment (leading to cracking) to occur in one year or more. When
performing any service that may risk exposure of compressor oil to
the roof, take appropriate precautions to protect roofing. Proce­dures which risk oil leakage include, but are not limited to,
compressor replacement, repairing refrigerant leaks, replacing
refrigerant components such as filter drier, pressure switch, me­tering device, coil, accumulator, or reversing valve.

SYNTHETIC ROOF PRECAUTIONARY PROCEDURE

1. Cover extended roof working area with an impermeable
polyethylene (plastic) drip cloth or tarp. Cover an approxi­mate 10 X 10 ft. area.

2. Cover area in front of the unit service panel with a terry
cloth shop towel to absorb lubricant spills and prevent
run-offs, and protect drop cloth from tears caused by tools
or components.

3. Place terry cloth shop towel inside unit immediately under
component(s) to be serviced and prevent lubricant run-offs
through the louvered openings in the unit base.

4. Perform required service.

5. Remove and dispose of any oil contaminated material per
local codes.

D. Liquid Line Filter Drier

The biflow filter drier is specifically designed to operate with
Puron. Use only factory-authorized components. Filter drier must
be replaced whenever the refrigerant system is opened. When

removing a filter drier, use a tubing cutter to cut the drier from the
system. Do not unsweat a filter drier from the system. Heat
from unsweating will release moisture and contaminants from
drier into system.

E. Puron (R-410A) Refrigerant Charging

Refer to unit information plate and charging chart. Some R-410A
refrigerant cylinders contain a dip tube to allow liquid refrig­erant to flow from cylinder in upright position. For cylinders

equipped with a dip tube, charge Puron units with cylinder in
upright position and a commercial metering device in manifold
hose. Charge refrigerant into suction-line.

XIV. SYSTEM INFORMATION
A. Loss of Charge Switch

The loss of charge switch is a protective device wired into control
circuit (low voltage). It shuts off the compressor if abnormally low
pressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigeration
system under pressure, it is not advisable to remove this device for
troubleshooting unless you are reasonably certain that a problem
exists. If switch must be removed, remove and recover all system
charge so that pressure gauges read 0 psi. Never open system
without breaking vacuum with dry nitrogen.

B. Check Defrost Thermostat

There is a liquid header with a brass distributor and feeder tube
going into outdoor coil. At the end of 1 of the feeder tubes, there
is a 3/8-in. OD stub tube approximately 3 in. long. (See Fig. 30)
The defrost thermostat should be located on stub tube. Note that
there is only 1 stub tube used with liquid header, and on most units
it is the bottom circuit.

FEEDER TUBE

STUB TUBE

DEFROST
THERMOSTAT

C99029

Fig. 30—Defrost Thermostat

The defrost thermostat signals heat pump that conditions are right
for defrost or that conditions have changed to terminate defrost. It
is a thermally actuated switch clamped to outdoor coil to sense its
temperature. Normal temperature range is closed at 30° ± 3°F and
open at 80° ± 5°F.

NOTE: The defrost thermostat must be located on the liquid side
of the outdoor coil on the bottom circuit and as close to the coil as
possible.

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting Chart (Table 7)
for troubleshooting information.

—26—

HEAT PUMP WITH PURON

REFRIGERATION SECTION-QUICK REFERENCE GUIDE

Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are de­signed to operate with Puron. Puron refrigerant cylinders are rose colored.

• Puron refrigerant cylinders manufactured prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright position.

Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down to allow liquid to flow.

• Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.

• Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose.

• Manifold sets should be 750 psig high-side and 200 psig low-side with 520 psig low-side retard.

• Use hoses with 750 psig service pressure rating.

• Leak detectors should be designed to detect HFC refrigerant.

• Puron, as with other HFCs, is only compatible with POE oils.

• Vacuum pumps will not remove moisture from oil.

• Only use factory specified liquid-line filter driers with rated working pressures no less than 600 psig.

• Do not install a suction-line filter drier in liquid line.

• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

• POE oils may cause damage to certain plastics and roofing materials.

• Wrap all filter driers and service valves with wet cloth when brazing.

• A Puron liquid-line filter drier is required on every unit.

• Do not use an R-22 TXV.

• Never open system to atmosphere while it is under a vacuum.

• When system must be opened for service, break vacuum with dry nitrogen and replace filter driers.

• Do not vent Puron into the atmosphere.

• Observe all warnings, cautions, and bold text.

• Do not leave Puron suction line driers in place for more than 72 hrs.

—27—

QUICK REFERENCE GUIDE

SET-UP INSTRUCTIONS FOR WARMER HEATING TEMPERATURES

AND SUPER HUMIDITY CONTROL IN COOLING

EASY SELECT BOARD

9 PIN CONNECTOR

ICM PRINTED CIRCUIT BOARD

SEC1 SEC2

EASY SELECT

AUX HEAT KW/CFM

0-30

0-20

1075

A

B

C

D

E

F

VIO

BLU

ORN

BLK

WHT

YEL

875

AC/HP SIZE

036 030 024 018

SYSTEM TYPE

AC

HP-COMFORT

AC/HP CFM ADJUST

NOM HI

ON/OFF DELAY

09030900

CONTINUOUS FAN

MED HI YELLO

HEATER/MOTOR

TM

0-10

0-5

725

625

HP-EFF

LO

ENH

0

12 PIN CONNECTOR

J2

J1

AUX1 HUM1

AUX2

24VAC

GRY

HUM2

D
R

Y

C

W
W

Y/Y
G
O

H

1
2

1

2

1. Configuration Taps
(See Installation Instructions, for detailed description.)

A. AUX HEAT - Set for heater size (Ex: 0-10 for 10 kw)
B. AC/HP SIZE - Set for size of outdoor unit
C. SYSTEM TYPE - Select "HP COMFORT"
D. AC/HP CFM ADJUST - Select "LO"
E. ON/OFF DELAY - Select "ENH"
F. CONTINUOUS FAN - Select desired speed

2. Remove Jumper J1 to activate all dehumidify modes.

3. Complete wiring and install outdoor temperature sensor
according to Installation Instructions.

THERMIDISTAT™ CONTROL SETTINGS

1. Set "DIP Switches" - Set the dip switches (back of Thermidistat
Control Board) appropriately for specific system being installed.

2. Thermidistat Control Configurations
(See Thermidistat™ Control Installation Instructions for
detailed description.)

• Option 5 (Variable Speed Motors) - set to ON

• Option 7 (Super Dehumidify) - set to ON

• Option 12 (Heaters during Defrost) - setting "2" is
suggested for all heaters

• Option 16 - Heat pump systems set to ON for warmer heat
below 40° F.

• Option 17 - Select programmable or non-programmable mode.

3. Set desired humidity level on front of Thermidistat
(50 to 55% RH recommended). For dehumidification in
cooling, both "dhu" and "cool" must be displayed.

ECM ID BLOWER MOTOR-QUICK REFERENCE GUIDE

C01034

—28—

SYMPTOM CAUSE REMEDY

Compressor and outdoor fan
will not start

Compressor will not start but condenser fan
runs

Three-phase scroll compressor (size 030­060 units) may be a low pressure differential

Compressor cycles (other than normally
satisfying thermostat)

Compressor operates continuously

Excessive head pressure

(Continued next page)

TABLE 7—TROUBLESHOOTING CHART

Power Failure Call power company
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker
Defective thermostat, contactor, transformer,
control relay, defrost board, or high pressure or loss­of-charge/low pressure switch
Insufficient line voltage Determine cause and correct
Incorrect or faulty wiring Check wiring diagram and rewire correctly

Thermostat setting too high

Units have a 5-minute time delay
Faulty wiring or loose connections in compressor

circuit
Compressor motor burned out, seized, or
internal overload open
Defective run capacitor, overload, or PTC
(positive temperature coefficient) thermistor

One leg of 3-phase power dead

Low input voltage (20 percent low) Determine cause and correct
Scroll compressor is rotating in the wrong
direction

Refrigerant overcharge or undercharge
Defective compressor Replace and determine cause

Insufficient line voltage Determine cause and correct
Blocked outdoor coil Determine cause and correct
Defective run/start capacitor, overload or start
relay
Defective thermostat Replace thermostat
Faulty outdoor-fan motor or capacitor Replace
Damaged reversing valve Determine cause and correct
Restriction in refrigerant system Locate restriction and remove
Dirty air filter Replace filter
Unit undersized for load Decrease load or increase unit size
Thermostat set too low Reset thermostat
Low refrigerant charge Locate leak, repair, and recharge

Frosted coil with incorrect defrost operation

Air in system
Outdoor coil dirty or restricted Clean coil or remove restriction

Dirty air filter Replace filter
Dirty indoor or outdoor coil Clean coil
Refrigerant overcharged Recover excess refrigerant

Air in system
(Heat) Indoor air restricted or recirculating Determine cause and correct

Indoor or outdoor air restricted or air short-cycling Determine cause and correct

Replace component

Lower thermostat setting below room
temperature
DO NOT bypass this compressor time
delay–wait for 5 minutes until time-delay
relay is deenergized

Check wiring and repair or replace
Determine cause.

Replace compressor
Determine cause and replace
Replace fuse or reset circuit breaker. Determine

cause
Correct the direction of rotation by reversing the

3-phase power leads to the unit
Recover refrigerant, evacuate system, and
recharge to capacities shown on nameplate

Determine cause and replace

Check defrost time settings
Reset as necessary
Check defrost temperature switch
Replace as necessary
Recover refrigerant, evacuate system,
and recharge

Recover refrigerant, evacuate system,
and recharge

—29—

TABLE 7—TROUBLESHOOTING CHART (CONT’D)

SYMPTOM CAUSE REMEDY

Head pressure too low

Excessive suction pressure

Suction pressure too low

Compressor runs but outdoor fan does not

IFM does not run

IFM operation is intermittent

IFM–Indoor Fan Motor

Low refrigerant charge Check for leaks, repair and recharge
Restriction in liquid tube Remove restriction
(Cool) High Heat load Check for source and eliminate
Reversing valve hung up or leaking internally Replace valve
Refrigerant overcharged Recover excess refrigerant
(Cool) Dirty air filter Replace filter

(Heat) Outdoor coil frosted
Low refrigerant charge Check for leaks, repair and recharge

Metering device or low side restricted Remove source of restriction
(Cool) Insufficient coil airflow
(Cool) Temperature too low in conditioned area Reset thermostat

(Cool) Outdoor ambient below 55°F Install low-ambient kit
Filter-drier restricted Replace
NC (normally closed) contacts on defrost board
open
Blower wheel not secured to shaft Properly tighten blower wheel to shaft
Insufficient voltage at motor Determine cause and correct
Power connectors not properly sealed Connectors should snap easily; do not force
Water dripping into motor Verify proper drip loops in connector wires

Connectors not firmly sealed

Move timer on control board to 30 minutes
between defrost cycles

Increase air quantity
Check filter–replace if necessary

Check condition of relay on board
Replace if necessary

Gently pull wires individually to be sure they are
crimped into the housing

—30—

START-UP CHECKLIST

(Remove and Store in Job File)

I. Preliminary Information

MODEL NO.:_________________________________
SERIAL NO.:__________________________________
DATE:_______________________________________
TECHNICIAN:_________________________________

II. PRE-START-UP (Insert checkmark in box as each item is completed)

( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)
( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE
( ) VERIFY THAT UNIT INSTALLATION IS LEVEL
( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS
( ) MAKE SURE THAT -

III. START-UP
ELECTRICAL

SUPPLY VOLTA GE __________________________________
COMPRESSOR AMPS_________________________________
INDOOR (EVAPORATOR) FAN AMPS___________

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE ___________DB
RETURN-AIR TEMPERATURE ___________DB ___________WB
COOLING SUPPLY AIR ___________DB ___________WB
HEAT PUMP SUPPLY AIR ___________
GAS HEAT SUPPLY AIR ___________
ELECTRIC HEAT SUPPLY AIR ___________

PRESSURES

GAS INLET PRESSURE ___________IN.WG
GAS MANIFOLD PRESSURE ___________IN.WG
REFRIGERANT SUCTION ___________PSIG SUCTION LINE TEMP*___________
REFRIGERANT DISCHARGE ___________PSIG DISCHARGE TEMP†___________
( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS
GAS HEAT TEMPERATURE RISE
TEMPERATURE RISE (See Literature)
MEASURED TEMPERATURE RISE___________
*Measured at suction inlet to compressor
†Measured at liquid line leaving condenser.

(If Applicable) ON 060 SIZE PURON HEATPUMP ONLY, THE TWO WIRE TIES FASTEN

TO THE OUTDOOR COILS AND REVERSING VALVE/ACCUMULATOR HAVE BEEN REMOVED

RANGE___________

EASY SELECT

Heat Settings

IV. EASY SELECT SETTINGS

FULL UNIT MODEL NUMBER:___________
ENTER AVAILABLE HEATSETTINGS
ENTER AVAILABLE AIRFLOW HEAT AIR PIN CONNECTION
SETTING___________
ENTER AVAILABLE SIZES SIZE PIN CONNECTION SETTING___________
TYPE PIN CONNECTION SETTING___________
ADJUST PIN CONNECTION SETTING___________
DELAY PIN CONNECTION SETTING___________
(0/0 or 0/90 for gas/electric models)
CONTINOUS FAN PIN CONNECTION SETTING___________

—31—

AC HP Size

System Type

AC HP-Comfort HP.Eff

AC/HP CFM Adjust

Norm Lo Hi

On/Off Delay

0/90

30/90

0/0

ENH

Continous Fan

Lo Med Hi

C01999

© 2003 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231

—32—

Printed in U.S.A. ii604b243 Catalog No. 5360-404