Bryant 701A User Manual

Installation, Start-Up

701A

and Operating Instructions

3-PHASE SINGLE PACKAGED
ELECTRIC COOLING UNITS

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

Field Fabricate Ductwork .........................................................2

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

INSPECTION ......................................................................2

INSTALLATION ................................................................6

Connect Condensate Drain .......................................................6

Install Duct Connections ..........................................................6

CONFIGURING UNITS FOR DOWNFLOW (VERTI-

CAL) DISCHARGE ............................................................6

Install Electrical Connection ....................................................9

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

SPECIAL PROCEDURES FOR 208-V OPERATION ...10

CONTROL VOLTAGE CONNECTIONS.......................10

STANDARD CONNECTION ..........................................10

TRANSFORMER PROTECTION....................................12

PRE-START-UP ..........................................................................12

START-UP ...................................................................................12

CHECK FOR REFRIGERANT LEAKS..........................12

START UP COOLING SECTION AND MAKE ADJUST-

MENTS..............................................................................13

CHECKING COOLING CONTROL OPERATION .......13

CHECKING AND ADJUSTING REFRIGERANT

CHARGE ...........................................................................13

INDOOR AIRFLOW AND AIRFLOW ADJUST-

MENTS..............................................................................13

FOR 208/230V ..................................................................13

FOR 460-V GE MOTORS................................................16

COOLING SEQUENCE OF OPERATION.....................16

MAINTENANCE.........................................................................16

AIR FILTER......................................................................16

EVAPORATOR BLOWER AND MOTOR.....................16

CONDENSER COIL, EVAPORATOR COIL, AND CON-

DENSATE DRAIN PAN ..................................................17

CONDENSER FAN ..........................................................18

ELECTRICAL CONTROLS AND WIRING ..................21

REFRIGERANT CIRCUIT...............................................21

EVAPORATOR AIRFLOW .............................................21

METERING DEVICE — ACUTROL DEVICE .............21

LIQUID LINE STRAINER ..............................................21

Troubleshooting............................................................................21

Start-Up Checklist ........................................................................21

702A

Cancels: New II 701A-30-1

2-06

C99062

Fig. 1—Unit 701A and 702A

NOTE TO INSTALLER — Before the installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User’s Manual and Replacement Guide are left with
the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations. 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.

WARNING: Before performing service or maintenance
operations on system, turn off power to unit. Turn off
accessory heater power switch, if applicable. Electrical
shock can cause personal injury.

Recognize safety information. This is the safety-alert symbol .
When you see this symbol in instructions or manuals, be alert to
the potential for personal injury.

—1—

Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in 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.

These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen­tial construction practices. We require these instructions as a
minimum for a safe installation.

INTRODUCTION

The 701A and 702A units (see Fig. 1) are fully self-contained, and
designed for outdoor installation. See Figs. 2 and 3 for unit
dimensions. All unit sizes have discharge openings for both
horizontal and downflow configurations, and are factory shipped
with all downflow duct openings covered . Units may be installed
either on a rooftop, ground-level cement slab, or directly on the
ground if local codes permit. (See Fig. 4 for roof curb dimensions.)

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. 4). 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. 5A). 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. 5B). 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 Fig. 2 & 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 grille. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction. The minimum clearance
under a partial overhang (such as a normal house overhang) is 36
in. above the unit top. The maximum horizontal extension of a
partial overhang must not exceed 48 in. For extended overhangs,
provide a minimum clearance of 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. FIELD FABRICATE DUCTWORK

Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal
applications, unit is provided with flanges on the horizontal
openings. All ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof openings
with counter flashing and mastic in accordance with applicable
codes.

Ducts passing through an unconditioned space must be insulated
and covered with a vapor barrier. If a plenum return is used on a
vertical unit, the return should be ducted through the roof deck to
comply with applicable fire codes. A minimum clearance is not
required around ductwork. Cabinet return-air static shall not
exceed -.25 in. wg.

V. 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.

WARNING: Never stand beneath rigged units or lift
over people.

WARNING: Never exceed 200 lbs. per bracket lifting
force.

WARNING: Accessory lifting kit is only to be used with
Small Packaged units which have a composite base pan
with molded rigging holds.

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.

—2—

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

TOP OF UNIT...................................................................................14.00 [355.6]

DUCT SIDE OF UNIT.........................................................................2.00 [50.8]

SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]

BOTTOM OF UNIT.............................................................................0.50 [12.7]

ELECTRIC HEAT PANEL .................................................................36.00 [914.4]

NEC. REQUIRED CLEARANCES.

BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

UNIT ELECTRICAL CHARACTERISTICS

INCHES [mm]

INCHES [mm]

UNIT WEIGHT

lb. kg X Y Z

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]

POWER ENTRY SIDE....................................................................42.00 [1066.8]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]

DUCT PANEL .................................................................................12.00 [304.8] *

*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 304.8 [12.00] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.

UNIT HEIGHT

IN. (MM)

CENTER OF GRAVITY

IN. (MM)

INCHES [mm]

”A”

701A030 208/230-3-60 258 117.0 35.02 (889.5) 19.0 (482.6) 14.0 (355.6) 15.0 (381.0)
701A036 208/230-3-60, 460-3-60 268 121.6 37.02 (940.3) 20.0 (508.0) 14.0 (355.6) 13.0 (330.2)
701A042 208/230-3-60, 460-3-60 294 133.3 35.02 (889.5) 19.0 (482.6) 14.0 (355.6) 13.0 (330.2)
702A030 208/230-3-60 291 132.0 39.02 (991.1) 19.5 (495.3) 15.5 (393.7) 17.6 (447.0)
702A036 208/230-3-60, 460-3-60 299 135.6 35.02 (889.5) 19.5 (495.3) 15.25 (387.4) 16.5 (419.1)

Fig. 2—701A030-042 and 702A030, 036 Unit Dimensions

—3—

C99007

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

TOP OF UNIT...................................................................................14.00 [355.6]

DUCT SIDE OF UNIT.........................................................................2.00 [50.8]

SIDE OPPOSITE DUCTS ................................................................14.00 [355.6]

BOTTOM OF UNIT.............................................................................0.50 [12.7]

ELECTRIC HEAT PANEL .................................................................36.00 [914.4]

NEC. REQUIRED CLEARANCES.

BETWEEN UNITS, POWER ENTRY SIDE ....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

UNIT ELECTRICAL CHARACTERISTICS

INCHES [mm]

INCHES [mm]

UNIT WEIGHT

lb. kg X Y Z

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

EVAP. COIL ACCESS SIDE............................................................36.00 [914.0]

POWER ENTRY SIDE....................................................................36.00 [914.0]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................36.00 [914.0]

DUCT PANEL .................................................................................12.00 [304.8] *

*MINIMUM DISTANCES: IF UNIT IS PLACED LESS THAN 304.8 [12.00] FROM
WALL SYSTEM, THEN SYSTEM PERFORMANCE MAYBE COMPROMISE.

UNIT HEIGHT

IN. (MM)

CENTER OF GRAVITY

IN. (MM)

INCHES [mm]

”A”

701A048 208/230-3-60, 460-3-60 324 145 38.98 (990.2) 20.0 (508.0) 17.0 (432.0) 17.0 (432.0)
701A060 208/230-3-60, 460-3-60 389 176 38.98 (990.2) 19.0 (482.6) 16.0 (406.0) 17.0 (432.0)
702A042 208/230-3-60, 460-3-60 321 146 38.98 (990.2) 20.5 (520.7) 16.75 (425.5) 16.6 (421.6)
702A048 208/230-3-60, 460-3-60 326 148 38.98 (990.2) 19.5 (495.3) 17.6 (447.6) 18.0 (457.2)
702A060 208/230-3-60, 460-3-60 399 181 42.98 (1091.1) 20.5 (520.7) 16.2 (412.8) 17.6 (447.0)

Fig. 3—701A048–060 and 702A042–060 Unit Dimensions

—4—

C99006

HVAC unit

Scre w

(NO TE A)

*Gask eting

outer flange

Flashing field

supplied

Roofing material

field supplied

Cant str ip

field supplied

base

Gask eting

inner flange*

Wood nailer*

Roofcurb*

Insulation (field

supplied)

Duct wo rk

field supplied

HVAC unit

Scre w

(NOTE A)

*Gask eting

outer flange

Flashing field

supplied

Roofing material

field supplied

Cant str ip

field supplied

base

Gask eting

inner flange*

Duct wo rk

field supplied

Wood nailer*

Roofcurb*

Insulation (field

supplied)

Roof

*Provided with roofcurb

Roof Curb for Small Cabinet

Note A: When unit mounting scre w is used,

Return opening

(B X C)

701A030-042 702A030-036

701A048-060 702A042-060

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Roof curb is made of 16-gage steel.

3. Table lists only the dimensions per part number that have changed

4. Insulated panels: 1-in. thick fiberglass 1 lb. density.

retainer bra cke t must also be used.

Supply opening
(B x C)

B Typ.

5

/16"

44

Insulated
deck pan

C Typ .

D

Long

Support

UNIT SIZE ODS CATALOG NUMBER

CPRFCURB006A00 8 (203) 11(279) 16-1/2 (419) 28-3/4 (730)
CPRFCURB007A00 14 (356) 11(279) 16-1/2 (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)

Fig. 4A—Roof Curb Dimensions

Short

Support

Roof

*Provided with roofcurb

Roof Curb for Large Cabinet

Note A: When unit mounting scre w is used,

R/A

A

retainer bra cket must also be used.

S/A

Gask et around

duct

A

IN. (MM)

Insulated
deck pan

B

IN. (MM)

Gask et around

outer edge

C

IN. (MM)

C00076

D

IN. (MM)

—5—

12

y

43

CORNER #

1 59 62 76 69 84 84 85 71 78 85
2 48 50 50 45 54 60 60 55 56 66
3 56 58 71 88 106 61 64 85 80 108
4 95 98 97 122 145 86 90 110 112 140

TOTAL WEIGHT 258 268 294 324 389 291 299 321 326 399

A

B

Fig. 5A—Unit Leveling Tolerances

B. INSTALLATION

1. Position the lifting bracket assembly around the base of the
unit. Leave the top shipping skid on the unit to act as a
spreader bar. Be sure the strap does not twist.

2. Place each of the four (4) metal lifting brackets into the
rigging holds in the composite pan.

3. Tighten the ratchet strap unit tight. Lifting brackets should
be secure in the rigging holds.

4. Attach the clevis or hook of sufficient strength to hole in the
lifting bracket (see Fig. 6).

5. Attach safety straps directly to the field supplied rigging
straps or clevis clip. Do not attach the safety straps to the
lifting brackets.

6. Use the top of the unit as a spreader bar to prevent the
rigging straps from damaging the unit. If the wood top is not
available, use a spreader bar of sufficient length to not
damage the unit.

WARNING: Lifting point should be directly over the
center of gravity for the unit.

VI. CONNECT CONDENSATE DRAIN

NOTE: When installing condensate drain connection be sure to

comply with local codes and restrictions.

Models 701A and 702A dispose of condensate water through a 3/4
in. NPT fitting which exits through the base on the evaporator coil
access side. See Fig. 2 & 3 for location.

030 036 042 048 060 030 036 042 048 060

C

MAXIMUM ALLOWABLE

A-B B-C A-C

1/4 1/4 1/4

701A 702A

Fig. 4B—701A and 702A Unit Corner Weights

DIFFERENCE (in.)

C99065

x

Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground­level 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 drainpan
condensate connection to prevent the pan from overflowing (see
Fig. 7). When using a gravel apron, make sure it slopes away from
the unit.

Connect a drain tube using a minimum of 3/4 -in. PVC or 3/4 -in.
copper pipe (all field-supplied) at the outlet end of the 2-in. trap.
Do not undersize the tube. Pitch the drain tube downward at a
slope of at least 1-in. for every 10 ft. of horizontal run. Be sure to
check the drain tube for leaks. Prime trap at the beginning of the
cooling season start-up.

VII. INSTALL DUCT CONNECTIONS

The unit has duct flanges on the supply- and return-air openings on
the side and bottom of the unit. For downshot applications the
ductwork can be connected to the roof curb. See Fig. 2&3for
connection sizes and locations.

IMPORTANT: Use flexible connectors between ductwork and
unit to prevent transmission of vibration. Use suitable gaskets to
ensure weathertight and airtight seal. When electric heat is
installed, use fire proof 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 the unit discharge connection flange into the ductwork.

A. CONFIGURING UNITS FOR DOWNFLOW (VERTI­CAL) DISCHARGE

WARNING: Before performing service or maintenance

operations on the system, turn off main power to unit and
install lockout tag or electrical shock could result.

1. Open all electrical disconnects and install lockout tag before
starting any service work.

2. Remove return duct cover located on duct panel by breaking
four (4) connecting tabs with screwdriver and a hammer
(Fig. 8 & 9).

3. To remove supply duct cover, break front and right side
connecting tabs with a screwdriver and a hammer. Push
louver down to break rear and left side tabs (Fig. 8 & 9).

C00071

—6—

OPTIONAL

RETURN

AIR

OPENING

2"

OPTIONAL

SUPPLY

AIR

OPENING

EVAP. COIL COND. COIL

Fig. 5B—Slab Mounting Detail

DETAIL A

SIZE

030 280 127.0 19 482.6 14 355.6
036 290 131.5 20 508.0 14 355.6
042 316 143.3 19 482.6 14 355.6
048 346 156.9 20 508 17 431.8
060 411 186.4 19 482.6 16 406.4

030 313 142.5 19.5 495.3 15.50 393.7
036 321 145.6 19.5 495.3 15.25 387.4
042 343 155.6 20.5 520.7 16.75 425.5
048 348 157.9 19.5 495.3 17.62 447.6
060 421 191.0 20.5 520.7 16.25 412.8

4. If unit ductwork is to be attached to vertical opening flanges
on the unit composite base (jackstand applications only), do
so at this time. Collect ALL screws that were removed. Do
not leave screws on rooftop as permanent damage to the
roof may occur.

5. It is recommended that the unit base insulation around the
perimeter of the vertical return-air opening be secured to the

MAXIMUM WEIGHT A B

lb. kg in. mm. in. mm.

UNIT 701A

UNIT 702A

Fig. 6—Suggested Rigging

NOTE: The design and installation of the duct system must be in

accordance with the standards of the NFPA for installation of
nonresidence-type air conditioning and ventilating systems, NFPA
90A or residence-type, NFPA 90B; and/or local codes and
ordinances.
Adhere to the following criteria when selecting, sizing, and
installing the duct system:

unit base with aluminum tape. Applicable local codes may
require aluminum tape to prevent exposed fiberglass.

6. Cover both horizontal duct openings with the duct covers
from the accessory duct cover kit. Ensure opening is air-and
watertight.

7. After completing unit conversion, perform all safety checks
and power up unit.

8. Units are shipped for side shot installation.

9. Select and size ductwork, supply-air registers, and return-air
grilles according to American Society of Heating, Refrig­eration and Air Conditioning Engineers (ASHRAE) recom­mendations.

C99096

A05179

—7—

TABLE 1—PHYSICAL DATA—UNIT 701A

UNIT SIZE 030 036 042 048 060

NOMINAL CAPACITY (ton) 2-1/2 3 3-1/2 4 5

OPERATING WEIGHT (lb.) 258 268 294 324 389

COMPRESSOR Reciprocating Scroll Reciprocating

REFRIGERANT (R-22)

Quantity (lb.)

REFRIGERANT METERING DEVICE

* 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./min.
for throwaway type or 450 ft./min. for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in.

Face Area (sq. ft.)

CONDENSER FAN

Nominal Cfm

Diameter

Motor Hp (Rpm)

EVAPORATOR COIL

Rows...Fins/in.

Face Area (sq. ft.)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor Hp (RPM)

RETURN-AIR FILTERS (in.)*

Throwaway

3.65 4.4 6.4 5.1 7.4

AccuRater®

.034 .032 .034 .032 .030

1...17

9.1

2400

22

1/8 (825)

2...15

3.7

1000

10x10

1/4 (1075)

20x20 20x24 20x24 24x30 24x30

1...17

10.9

3000

18

1/4 (1100)

3...15

3.06

1200

11x10

1/2 (1075)

1...17

9.1

3000

22

1/4 (1100)

4...15

3.06

1400

11x10

3/4 (1075)

1...17

12.3

3600

22

1/4 (1100)

3...15

4.7

1600

11x10

3/4 (1075)

1/4 (1100)

1.0 (1100)

2...17

12.3

3600

22

4...15

4.7

2000

11x10

TABLE 2—PHYSICAL DATA—UNIT 702A

UNIT SIZE 030 036 042 048 060

NOMINAL CAPACITY (ton) 2-1/2 3 3-1/2 4 5

OPERATING WEIGHT (lb.) 291 299 321 326 399

COMPRESSOR Scroll

REFRIGERANT (R-22)

Quantity (lb.)

REFRIGERANT METERING DEVICE

*

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./min.

for throwaway type or 450 ft./min. for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.

Orifice ID (in.)

CONDENSER COIL

Rows...Fins/in.

Face Area (sq. ft.)

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor Hp (Rpm)

EVAPORATOR COIL

Rows...Fins/in.

Face Area (sq. ft.)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)

Size (in.)

Motor Hp (RPM)

RETURN-AIR FILTERS (in.)*

Throwaway

10. Use flexible transition between rigid ductwork and unit to
prevent transmission of vibration. The transition may be
screwed or bolted to duct flanges. Use suitable gaskets to
ensure weathertight and airtight seal.

11. All units must have field-supplied filters or accessory filter

4.4 5.2 7.6 8.3 8.1

AccuRater®

.030 .032 .034 .034 .032

1...17

12.7

2350

22

1/8 (825)

3...15

3.1

1000

10x10

1/4 (1075)

20x20 20x24 20x30 24x30 24x30

2...17

9.1

2350

22

1/8 (825)

3...15

3.7

1200

11x10

1/2 (1075)

2...17

9.1

3300

22

1/4 (1100)

3...15

4.7

1400

11x10

3/4 (1075)

2...17

12.3

3300

22

1/4 (1100)

4...15

4.7

1600

11x10

3/4 (1075)

1/4 (1100)

1.0 (1040)

of Sheet Metal and Air Conditioning Contractors National
Association (SMACNA) and Air Conditioning Contractors
of America (ACCA) minimum installation standards for
heating and air conditioning systems. Secure all ducts to
building structure.

2...17

16.4

3300

22

4...15

4.7

1750

11x10

rack installed in the return-air side of the unit. Recom­mended sizes for filters are shown in Tables 1 and 2.

12. Size all ductwork for maximum required airflow (either
heating or cooling) for unit being installed. Avoid abrupt

14. Flash, weatherproof, and vibration-isolate all openings in
building structure in accordance with local codes and good
building practices.

duct size increases or decreases or performance may be
affected.

13. Adequately insulate and weatherproof all ductwork located
outdoors. Insulate ducts passing through unconditioned
space, and use vapor barrier in accordance with latest issue

—8—

1” (25mm) MIN.

TRAP
OUTLET

2” (50mm) MIN.

Fig. 7—Condensate Trap

TABLE 3—MINIMUM AIRFLOW FOR SAFE ELECTRIC HEATER OPERATION (CFM)

SIZE

030 036 042 048 060

1000 1200 1400 1600 2000

C99013

SUPPLY
DUCT
OPENING

RETURN
DUCT
OPENING

Fig. 8—Supply and Return Duct Opening

VIII. INSTALL ELECTRICAL CONNECTION

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 (National Electrical
Code) ANSI/NFPA (latest edition) and local electrical
codes. In Canada, follow Canadian Electrical Code CSA
(Canadian Standards Association) C22.1 and local elec­trical codes. Failure to adhere to this warning could result
in personal injury or death.

C99011

DUCT COVERS REMOVED

C99012

Fig. 9—Vertical Duct Cover Removed

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.

4. Do not damage internal components when drilling
through any panel to mount electrical hardware, con­duit, etc. On 3-phase units, ensure phases are balanced
within 2 percent. Consult local power company for
correction of improper voltage and/or phase imbal­ance.

A. HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a field­supplied, waterproof, disconnect switch mounted at, or within

—9—

TABLE 4—ELECTRICAL DATA—701A

UNIT 701A

SIZE

030 208/230–3–60 187 254 8.3 68 0.8 2

036

042

048

060

(See legend following Electrical Data charts)

V-PH-HZ

208/230–3–60 187 254 10.9 78 1.4 2.8

460–3–60 414 508 5.8 40 0.8 1.4

208/230–3–60 187 254 10.7 85 1.4 4

460–3–60 414 508 5.3 42 0.8 2

208/230–3–60 187 254 14.6 108 2.1 5

460–3–60 414 508 7.3 48 1.1 2.3

208/230–3–60 187 254 18.6 125 2.1 6.8

460–3–60 414 508 8.5 66.5 1.1 3.2

VOLTAGE

RANGE

Min Max RLA LRA FLA FLA Nominal Kw* FLA MCA Max Fuse orCkt Bkr MOCP

COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY

-/-

3.8/5.0

7.5/10.0

11.3/15.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

-

5
10
15

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/19.9

-

5
10
15
20

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/19.9

-

5
10
15
20

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/19.9

-

5
10
15
20

-/-

10.4/12 .0

20.8/24.1

31.3/36.1

-/-

10.4/12.0

20.8/24.1

31.3/36.1

-

6
12
18

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-

6
12
18

24.1

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-

6
12
18

24.1

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.6/48.0

-

6
12
18
24

13.2/13.2

15.5/17.5

28.6/32.6

41.6/47.6

17.8/17.8

16.5/18.5

29.6/33.6

42.6/48.6

9.5

9.5

16.8

24.3

18.8/18.8

31.1/35.1

44.1/50.1

57.0/65.0

9.4

10.0

17.5

25.1

32.6

25.4/25.4

25.4/25.4

32.3/36.3

45.3/51.4

58.2/66.2

12.5

12.5

17.9

25.4

32.9

32.2/32.2

32.2/32.2

34.6/38.6

47.6/53.6

60.5/68.5

14.9

14.9

19.0

26.6

34.1

20/20
20/20
30/35
45/50
25/25
25/25
30/35
45/50

15
15
20

25
25/25
25/25
35/40
45/60

—

15

15

20

30

35
30/30
30/30
35/40
50/60

—

15

15

20

30

35
40/40
40/40
40/40
50/60

—

20

20

20

30

35

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

60/70

—
—
—
—
—
—
—
—
—

60/70

—
—
—
—
—
—
—
—
—

70/70

—
—
—
—
—

sight from, the unit. Refer to the unit rating plate for maximum
fuse/circuit breaker size and minimum circuit amps (ampacity) for
wire sizing. See Tables 4 and 5 for electrical data.

The field-supplied disconnect switch box may be mounted on the
unit over the high-voltage inlet hole when the standard power and
low-voltage entry points are used. See Fig. 2 & 3 for acceptable
location.

See unit wiring label and Fig. 10 for reference when making high
voltage connections. Proceed as follows to complete the high­voltage connections to the unit.

1. Run the high-voltage (L1, L2, L3) and ground leads into the
control box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the lines
side of the contactor.

4. Connect field L1 to black wire on connection 11 of the
compressor contactor.

5. Connect field wire L2 to yellow wire on connection 13 of
the compressor contactor.

6. Connect field wire L3 to Blue wire from compressor.

B. SPECIAL PROCEDURES FOR 208-V OPERATION

WARNING: Make sure that the power supply to the unit

is switched OFF and lockout tag installed before making
any wiring changes. Electrical shock can cause serious
injury or death.

C. CONTROL VOLTAGE CONNECTIONS

NOTE: Do not use any type of power-stealing thermostat. Unit

control problems may result.
Use no. 18 American Wire Gage (AWG) color-coded, insulated
(35° C minimum) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than 100 ft. from the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded, insulated (35° C
minimum) wires.

D. STANDARD CONNECTION

Remove knockout hole located in the electric heat panel adjacent
to the control access panel. See Fig.2&3.Removetherubber
grommet from the installer’s packet (included with unit) and install
grommet in the knockout opening. Provide a drip loop before
running wire through panel.
Run the low-voltage leads from the thermostat, through the inlet
hole, and into unit low-voltage splice box.
Locate five 18-gage wires leaving control box. These low-voltage
connection leads can be identified by the colors red, green, yellow,
brown, and white (See Fig. 10). Ensure the leads are long enough

—10—

TABLE 5—ELECTRICAL DATA—702A

UNIT 702A

SIZE

030 208/230–3–60 187 253 9.0 63.0 0.8 2.1

036

042

048

060

(See legend following Electrical Data charts)

V-PH-HZ

208/230–3–60 187 253 11.2 75.0 0.8 3.6

460–3–60 414 506 5.4 37.5 0.9 1.9

208/230–3–60 187 253 12.4 88.0 1.6 4.1

460–3–60 414 506 6.1 44.0 0.9 2.0

208/230–3–60 187 253 13.0 93.0 1.5 4.1

460–3–60 414 506 6.4 46.5 0.9 1.9

208/230–3–60 187 253 17.3 123.0 1.6 6.2

460–3–60 414 506 9.0 62.0 0.9 3.2

VOLTAGE

RANGE

Min Max RLA LRA FLA FLA Nominal Kw

COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY

-/-

3.8/5.0

7.5/10.0

11.3/15.0

-/-

3.8/5.0

7.5/10.0

11.3/15.0

-

5
10
15

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-

5
10
15
20

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-

5
10
15
20

-/-

3.8/5.0

7.5/10.0

11.3/15.0

15.0/20.0

-

5
10
15
20

*

FLA MCA Max Fuse orCkt Bkr MOCP

10.4/12.0

20.8/24.1

31.3/36.1

10.4/12.0

20.8/24.1

31.3/36.1

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

6.0

12.0

18.0

24.1

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

6.0

12.0

18.0

24.1

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

6.0

12.0

18.0

24.1

14.2/14.2

-/-

15.7/17.7

28.7/32.7

41.7/47.7

-/-

18.4/18.4

18.4/19.5

30.6/34.6

43.6/49.6

-/­6

12
18

-/-

-/-

-/-

-/-

-/-

-/-

9.6

9.9

17.4

24.9

21.2/21.2

21.2/21.2

31.2/35.2

44.2/50.2

57.2/65.3

10.5

10.5

17.5

25.1

32.6

21.9/21.9

21.9/21.9

31.2/35.2

44.2/50.2

57.2/65.3

10.8

10.8

17.4

24.9

32.4

29.4/29.4

29.4/29.4

33.8/37.8

46.8/52.9

59.9/67.9

15.4

15.4

19.0

26.6

34.1

20/20
20/20
30/35
45/50
25/25
25/25
35/35
45/50

15
15
20

25
25/25
25/25
35/40
45/60

—

15

15

20

30

35
30/30
30/30
35/40
45/60

—

15

15

20

25

35
35/35
35/35
35/40
50/60

—

20

20

20

30

35

—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

60/70

—
—
—
—
—
—
—
—
—

60/70

—
—
—
—
—
—
—
—
—

60/70

—
—
—
—
—

LEGEND

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

—

Circuit Breaker

®

NOTES:

1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. Canadian units may be
fuse or circuit breaker.

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

3. Unbalanced 3-Phase Supply Voltage

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

the percentage of voltage imbalance.

Use the following formula to determine

% Voltage imbalance

= 100 x

max voltage deviation from average voltage

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

452 + 464 + 455

3

1371

=

3

= 457

Determine maximum deviation from average voltage.

(AB) 457
(BC) 464
(AC) 457

452=5v

457=7v
455=2v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.

—11—

HIGH VOLTAGE
POWER LEADS
(SEE UNIT WIRING
LABEL)

CONTROL BOX

LOW-VOLTAGE
POWER LEADS
(SEE UNIT
WIRING LABEL)

Field Control-Voltage Wiring
Field High-Voltage Wiring

SPLICE BOX

LEGEND

GND

FIELD-SUPPLIED
FUSED DISCONNECT

YEL(Y)

GRN(G)

RED(R)

BRN(C)

Y

G

R

C

POWER
SUPPLY

THERMOSTAT
(TYPICAL)

C99010rev2

Fig. 10—High- and Control-Voltage Connections

to be routed into the low-voltage splice box (located below right
side of control box). Stripped yellow wire is located in connection
box. Route leads through hole in bottom of control box and make
low-voltage connections (See Fig. 10). Secure all cut wires, so that
they do not interfere with operation of unit.

E. TRANSFORMER PROTECTION

The transformer is of the energy-limiting type. It is set to
withstand a 30-second overload or shorted secondary condition.

PRE-START-UP

WARNING: Failure to observe the following warnings

could result in serious personal injury:

1. Follow recognized safety practices and wear protective

goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric

power to unit unless 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 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.

Proceed as follows to inspect and prepare the unit for initial
startup:

1. Remove access panel.

2. Read and follow instructions on all 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, halide torch, or liquid­soap solution. If a refrigerant leak is detected, see Check
for Refrigerant Leaks section.

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

that connections are completed and tight.

d. Ensure electrical wiring does not contact refrigerant

tubes or sharp metal edges.

e. Inspect coil fins. If damaged during shipping and han-

dling, carefully straighten fins with a fin comb.

Verify the following conditions:

a. Make sure that condenser-fan blade is correctly posi-

tioned in fan orifice. Leading edge of condenser-fan
blade should be 1/2 in. maximum from fan orifice (See
Fig. 11).

b. Make sure that air filter(s) is in place.

c. Make sure that condensate drain trap is filled with water

to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose parts

have been removed.

START-UP

A. CHECK FOR REFRIGERANT LEAKS

Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:

1. Locate leak and make sure that refrigerant system pressure
has been relieved and reclaimed from both high- and
low-pressure ports.

MOTOR

1/8" MAX BETWEEN
MOTOR AND FAN HUB

MOTOR SHAFT

FAN GRILLE

1/2˝

C99009

Fig. 11—Fan Blade Clearance

2. Repair leak following accepted practices. NOTE: Install a
filter drier whenever the system has been opened for repair.

3. Add a small charge of R-22 refrigerant vapor to system and
leak-test unit.

4. Recover refrigerant from refrigerant system and evacuate to
500 microns if no additional leaks are not found.

5. Charge unit with R-22 refrigerant, using a volumetric­charging cylinder or accurate scale. Refer to unit rating
plate for required charge. Be sure to add extra refrigerant to
compensate for internal volume of filter drier.

—12—

B. START-UP COOLING SECTION AND MAKE AD­JUSTMENTS

CAUTION: 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 compressor when the outdoor temperature
is below 40°F (unless accessory low-ambient kit is
installed). Do not rapid-cycle the compressor. Allow 5
minutes between “on” cycles to prevent compressor
damage.

C. CHECKING COOLING CONTROL OPERATION

Start and check the unit for proper cooling control operation as
follows:

1. Place room thermostat SYSTEM switch in OFF position.
Observe that blower motor starts when FAN switch is
placed in ON position and shuts down after 30 second fan
time delay expires when FAN switch is placed in AUTO
position.

2. Place SYSTEM switch in COOL position and FAN switch
in AUTO position. Set cooling control below room tem­perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that compressor
and outdoor fan shut down when control setting is satisfied
and that indoor blower shuts down after 30 second fan time
delay expires.

3. When using an auto-changeover room thermostat, place
both SYSTEM and FAN switches in AUTO positions.
Observe that unit operates in heating mode when tempera­ture control is set to “call for heating” (above room
temperature) and operates in cooling mode when tempera­ture control is set to “call for cooling” (below room
temperature).

IMPORTANT: Three-phase, scroll compressor units (701A048,
702A030-060) are direction-oriented. These units 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, scroll compressors
emit elevated noise levels, and the difference between compressor
suction and discharge pressures may be dramatically lower than
normal.

D. CHECKING AND ADJUSTING REFRIGERANT
CHARGE

The refrigerant system is fully charged with R-22 refrigerant,
tested, and factory-sealed.

NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper R-22 charge.

A superheat charging chart is attached to the outside of the service
access panel. The chart includes the required suction line tempera­ture at given suction line pressures and outdoor ambient tempera­tures (See Fig. 14–23).

An accurate superheat, thermocouple- or thermistor-type ther­mometer, a sling psychrometer, and a gauge manifold are required
when using the superheat charging method for evaluating the unit
charge. Do not use mercury or small dial-type thermometers

because they are not adequate for this type of measurement.

NOTE: Allow system to operate in the cooling mode for a
minimum of 10 minutes before checking or adjusting refrigerant
charge.

CAUTION: When evaluating the refrigerant charge, an
indicated adjustment to the specified factory charge must
always be very minimal. If a substantial adjustment is
indicated, an abnormal condition exists somewhere in the
cooling system, such as insufficient airflow across either
coil or both coils.

Proceed as follows:

1. Remove caps from low- and high-pressure service fittings.

2. Using hoses with valve core depressors, attach low- and
high-pressure gauge hoses to low- and high-pressure service
fittings, respectively.

3. Start unit in Cooling mode and let unit run until system
pressures stabilize.

4. Measure and record the following:
a. Outdoor ambient-air temperature (°F db).

b. Evaporator inlet-air temperature (°F wb).

c. Suction-tube temperature (°F) at low-side service fitting.

d. Suction (low-side) pressure (psig).

5. Using “Cooling Charging Charts” compare outdoor-air
temperature (°F db) with the suction line pressure (psig) to
determine desired system operating suction line tempera­ture. See Fig. 14-23.

6. Compare actual suction-tube temperature with desired
suction-tube temperature. Using a tolerance of ±3°F, add
refrigerant if actual temperature is more than 3°F higher
than proper suction-tube temperature, or remove refrigerant
if actual temperature is more than 3°F lower than required
suction-tube temperature.

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

E. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

CAUTION: For cooling operation, the recommended

airflow is 350 to 450 cfm for each 12,000 Btuh of rated
cooling capacity.

Tables 8 and 9 show cooling airflows at various external static
pressures. 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.

WARNING: Disconnect electrical power to the unit and
install lockout tag before changing blower speed. Elec­trical shock can cause serious injury or death.

Airflow can be changed by changing the lead connections of the
blower motor.
Unit 701A two- or three-speed motors (except size 030) are factory
wired for low speed operation. Unit 701A030 is factory wired for
medium speed.
All 702A units are factory wired for low speed and may need to be
wired for medium or high speed in the field.

F. For 208/230V

For color coding on the 208/230V motor leads, see Table 6.
To change the speed of the indoor fan motor (IFM), remove the fan
motor speed leg lead from the time delay relay (TDR). This wire
is attached to terminal–3 of TDR for single-phase and 3-phase
units. To change the speed, remove and replace with lead for
desired blower motor speed. Insulate the removed lead to avoid

contact with chassis parts.

—13—

Fig. 12—Wiring Diagram (208/230-3-60)

—14—

C99004

Fig. 13—Wiring Diagram (460-3-60)

—15—

C99005

TABLE 6—COLOR CODING FOR 208/230–V MOTOR

LEADS

3-SPEED 2-SPEED

black = high speed black = high speed

blue = medium speed -

red = low speed red = low speed

G. FOR 460-V GE MOTORS

For color coding on the 460-v GE motor leads, see Table 7.

TABLE 7—COLOR CODING FOR 460-V GE MOTOR

LEADS

3-SPEED 2-SPEED

black = high black = high

violet = jumper blue = jumper

orange = medium -

red=low red=low

To change the speed of the indoor fan motor (IFM), remove fan
motor speed lead from the time delay relay (TDR) and replace with
the lead for the desired blower motor speed. The motor speed lead
is attached to terminal–3 of TDR. For low and medium speeds
black must be connected to the jumper wire. Insulate removed lead
end to avoid contact with chassis parts. To select high speed on
460-v GE motors, separate the black female quick connect (QC)
from the jumper lead male quick connect (QC) and connect the
black lead to the BR. Insulate the jumper to avoid contact with any

chassis parts.

H. COOLING SEQUENCE OF OPERATION

With the room thermostat SYSTEM switch in the COOL position
and the FAN switch in the AUTO position, the cooling sequence
of operation is as follows:

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
and G. These completed circuits through the thermostat connect
contactor coil (C) (through unit wire Y) and time delay relay
(TDR) (through unit wire G) across the 24-v secondary of
transformer (TRAN).

The normally open contacts of energized contactor (C) close and
complete the circuit through compressor motor (COMP) to con­denser (outdoor) fan motor (OFM). Both motors start instantly.

The set of normally open contacts of energized relay TDR close
and complete the circuit through evaporator blower (indoor) fan
motor (IFM).

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 a point that is slightly below the cooling control setting of the
room thermostat. At this point, the thermostat “breaks” the circuit
between thermostat terminal R to terminals Y and G. These open
circuits deenergize contactor coil C and relay coil TDR. The
condenser and compressor motors stop. After a 30-second delay,
the blower motor stops. The unit is in a “standby” condition,
waiting for the next “call for cooling” from the room thermostat.

MAINTENANCE

To ensure continuing high performance, and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This cooling unit should be
inspected at least once each year by a qualified service person. To
troubleshoot heating or cooling of units, refer to tables at the back
of the book.

The following are 701A Cooling Charging Charts:

The following are 702A Cooling Charging Charts:

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 PER­SONAL INJURY AND POSSIBLE DAMAGE TO THIS
EQUIPMENT.

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

1. Turn off electrical power to the unit and install lockout
tag before performing any maintenance or service on
the unit.

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

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

CAUTION: Errors made when reconnecting wires may
cause improper and dangerous operation. Label all wires
prior to disconnection 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 at least
each cooling season for cleanliness. Clean when necessary.

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

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

5. Ensure electric wires are not in contact with refrigerant
tubing or sharp metal edges.

A. AIR FILTER

CAUTION: 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 Tables 1 and 2 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 heating and cooling season or whenever the filter(s) becomes
clogged with dust and lint.

B. EVAPORATOR 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.

—16—

TABLE 8—WET COIL AIR DELIVERY (DEDUCT 10 PERCENT FOR 208V)*

HORIZONTAL AND DOWNFLOW DISCHARGE

UNIT 701A030-060

230 AND 460 VOLT

Unit

030

036

042

048

060

* Air delivery values are based on operating voltage of 230v or 460v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drops to obtain static
pressure available for ducting.

NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below
this point.

2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

Motor
Speed

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Watts280275270267264262260----

Cfm880825765693600450281----

Watts 380 375 365 360 355 350 344 335 312 - -

Cfm 1136 1085 1010 946 865 787 650 495 360 - -

Watts 485 475 470 460 455 445 437 430 415 385 -

Cfm 1415 1332 1266 1180 1100 1000 900 780 480 256 -

Watts 576 566 556 538 512 497 481 466 450 435 -

Cfm 1385 1297 1220 1165 1090 995 905 846 715 609 -

Watts 680 671 660 624 604 620 602 558 534 512 496

Cfm 1572 1460 1375 1305 1286 1192 1125 1046 891 800 730

Watts 810 800 790 782 766 742 723 709 688 661 627

Cfm 1685 1620 1560 1486 1389 1322 1284 1170 1000 897 800

Watts - 675 660 650 640 630 620 610 595 580 -

Cfm - 1387 1326 1275 1204 1142 1081 995 918 850 -

Watts - 886 855 825 795 778 765 750 735 718 700

Cfm - 1458 1406 1350 1285 1224 1163 1091 1013 932 870

Watts - - - 1000 950 925 910 890 875 855 833

Cfm - - - 1488 1424 1360 1296 1233 1148 1071 1005

Watts - 727 712 700 688 666 644 622 595 569 -

Cfm - 1640 1600 1575 1505 1450 1390 1300 1205 1145 -

Watts - 853 836 821 807 782 756 730 699 667 640

Cfm - 1860 1830 1770 1700 1642 1565 1482 1385 1290 1210

Watts - 979 959 943 927 897 868 838 802 766 730

Cfm - 2090 2048 1997 1922 1845 1750 1600 1550 1425 1380

Watts 1033 949 864 836 822 808 772 737 705 674 642

Cfm 2050 2000 1945 1905 1880 1820 1775 1695 1627 1530 1480

Watts 1084 1054 1024 994 971 955 928 897 867 835 803

Cfm 2248 2179 2110 2058 2000 1932 1885 1829 1740 1638 1569

Watts - - 1184 1152 1120 1102 1084 1056 1029 997 965

Cfm - - 2278 2207 2124 2041 2000 1960 1856 1748 1645

External Static Pressure (in. wg)

2. Remove and clean blower wheel as follows:

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

a. Ensure proper reassembly by marking wheel orientation.

b. Lift wheel from housing. When handling and/or cleaning

blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.

To clean the blower motor and wheel:

1. Remove and disassemble blower assembly as follows:
a. Remove unit access panel.

b. Disconnect motor lead from time delay relay (TDR).

Disconnect yellow lead from terminal L2 of the contac­tor.

c. On all units remove blower assembly from unit. Remove

screws securing blower to blower partition and slide
assembly out. Be careful not to tear insulation in blower
compartment.

d. Ensure proper reassembly by marking blower wheel and

motor in relation to blower housing before disassembly.

e. Loosen setscrew(s) that secures wheel to motor shaft,

remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.

c. Remove caked-on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from wheel
and housing with vacuum cleaner, using soft brush
attachment. Remove grease and oil with mild solvent.

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure setscrews are

tightened on motor shaft flats and not on round part of
shaft.

f. Reinstall unit access panel.

3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during heating and
cooling cycles.

C. CONDENSER COIL, EVAPORATOR COIL, AND CON­DENSATE DRAIN PAN

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

—17—

TABLE 9—WET COIL AIR DELIVERY (DEDUCT 10 PERCENT FOR 208V)*

HORIZONTAL AND DOWNFLOW DISCHARGE

UNIT 702A030-060

230 AND 460 VOLT

Unit

030

036

042

048

060

* Air delivery values are based on operating voltage of 230v or 460v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drops to obtain static
pressure available for ducting.

NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below
this point.

2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.

Motor

Speed

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

Low

Med

High

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Watts246244243241-------

Cfm910806749680-------

Watts343339336332328322317----

Cfm 1148 1104 1028 958 850 782 645 ----

Watts----441432421410400--

Cfm----1102 988 896 783 529 - -

Watts - 470 458 445 430 415 399 384 - - -

Cfm - 1352 1257 1240 1199 1107 1015 924 - - -

Watts - - 514 501 487 471 455 438 422 - -

Cfm - - 1338 1295 1288 1181 1111 968 813 - -

Watts - - - 646 636 626 614 602 589 - -

Cfm - - - 1385 1268 1196 1159 1032 948 - -

Watts - 625 614 605 593 574 549 518 485 454 -

Cfm - 1540 1510 1473 1396 1348 1288 1192 1124 1037 -

Watts----726695661625591561540

Cfm----1648 1593 1530 1446 1352 1237 1114

Watts-------7907667421 713

Cfm-------161614921394 1283

Watts - 588 577 572 566 556 539 517 491 - -

Cfm - 1514 1543 1467 1408 1374 1324 1237 1161 - -

Watts - 756 738 719 699 676 650 623 596 572 555

Cfm - 1785 1765 1706 1628 1577 1503 1421 1357 1298 1253

Watts----896862829800775752728

Cfm----1880 1804 1704 1547 1565 1406 1367

Watts 903 898 873 842 814 792 777 764 743 701 618

Cfm 2190 2158 2081 2026 1958 1866 1822 1744 1678 1535 1377

Watts - 1002 978 960 941 914 880 839 798 764 750

Cfm - 2389 2291 2216 2120 2020 1952 1852 1727 1617 1549

Watts - - - 1080 1080 1066 1041 1008 972 938 -

Cfm - - - 2316 2181 2122 2101 2000 1802 1672 -

External Static Pressure (in. wg)

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.

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 tube with
clear water. Do not splash water on the insulation, motor, wiring,
or air filter(s). If the drain tube is restricted, clear it with a
“plumbers snake” or similar probe device. Ensure that the auxiliary
drain port above the drain tube is also clear

D. CONDENSER 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.

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

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

3. Inspect the fan blades for cracks or bends.

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

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).

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

7. Replace grille.

—18—

Fig. 14—Cooling Charging Chart, 701A030 Units

C99038

Fig. 15—Cooling Charging Chart, 701A036 Units

OUTDOOR TEMP
° F ° C

115 46

105 41

95 35
85 29
75 24

65 18
55 13

45 7

°

C99040

Fig. 16—Cooling Charging Chart, 701A042 Units Fig. 17—Cooling Charging Chart, 701A048 Units

C99041 C99042

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35
85 29
75 24
65 18
55 13

45 7

°

Fig. 18—Cooling Charging Chart, 701A060 Units

—19—

A99043

(030) 60HZ CHARGING CHART

OUTDOOR TEMP
° F ° C

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

(036) 60HZ CHARGING CHART

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35
85 29

75 24

65 18

55 13

45 7

°

Fig. 19—Cooling Charging Chart, 702A030 Units

(042) 60HZ CHARGING CHART

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35
85 29

75 24

65 18

55 13

45 7

C99046

°

Fig. 20—Cooling Charging Chart, 702A036 Units

(048) 60HZ CHARGING CHART

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35
85 29
75 24

65 18

55 13
45 7

C99045

°

Fig. 21—Cooling Charging Chart, 702A042 Units

C99047

°

C99048

Fig. 22—Cooling Charging Chart, 702A048 Units

—20—

(060) 60HZ CHARGING CHART

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35
85 29
75 24

65 18

55 13

45 7

°

Fig. 23—Cooling Charging Chart, 702A060 Units

C99049

E. ELECTRICAL CONTROLS AND WIRING

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

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 the
access panel. Start the unit, and observe at least one complete
heating cycle and one complete cooling cycle to ensure proper
operation. If discrepancies are observed in either or both operating
cycles, or if a suspected malfunction has occurred, check each
electrical component with the proper electrical instrumentation.
Refer to the unit wiring label when making these checkouts.

NOTE: Refer to the heating and/or cooling sequence of operation
in this publication as an aid in determining proper control
operation

F. REFRIGERANT CIRCUIT

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

WARNING: System under pressure. Relieve pressure
and recover all refrigerant before system repair or final
unit disposal to avoid personal injury or death. Use all
service ports and open all flow-control devices, including
solenoid valves.

If oil is detected or if low cooling performance is suspected,
leak-test all refrigerant tubing using an electronic leak-detector,
halide torch, 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 cooling performance is
suspected, refer to Checking and Adjusting Refrigerant Charge
section.

G. EVAPORATOR AIRFLOW

The heating and/or cooling air-flow 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.

H. METERING DEVICE — ACUTROL DEVICE

This metering device is a fixed orifice and is located in the header
to the evaporator coil.

I. LIQUID LINE STRAINER

The liquid line strainer (to protect metering device) is made of wire
mesh and located in the liquid line on the inlet side of the metering
device.

TROUBLESHOOTING

Use the Troubleshooting–Cooling guide (see Table 10) if problems
occur with these units.

START-UP CHECKLIST

Use the Start-Up checklist to ensure proper start-up procedures are
followed.

—21—

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Compressor will not start but condenser fan

Three-phase scroll compressor (701A048,

702A030-060) makes excessive noise, and

there may be a low pressure differential.

(other than normally satisfying thermostat).

Compressor operates continuously.

Excessive head pressure.

Head pressure too low.

Excessive suction pressure.

Suction pressure too low.

runs.

Compressor cycles

TABLE 10—TROUBLESHOOTING—COOLING

Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker

Defective thermostat, contractor, transformer, or

Faulty wiring or loose connections in compressor

Compressor motor burned out, seized, or internal

Defective run/start capacitor, overload, start relay Determine cause and replace

Refrigerant overcharge or undercharge

Defective run/start capacitor, overload or start

Faulty condenser-fan motor or capacitor Replace

Condenser air restricted or air short-cycling Determine cause and correct

Metering device or low side restricted Remove source of restriction

Temperature too low in conditioned area Reset thermostat

Field-installed filter-drier restricted Replace

Power Failure Call power company

control relay

Insufficient line voltage Determine cause and correct

Incorrect or faulty wiring Check wiring diagram and rewire correctly

Thermostat setting too high

circuit

overload open

One leg of 3-phase power dead

Scroll compressor is rotating

in the wrong direction

Defective compressor Replace and determine cause

Insufficient line voltage Determine cause and correct

Blocked condenser Determine cause and correct

relay

Defective thermostat Replace thermostat

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

Leaking valves in compressor Replace compressor

Air in system

Condenser coil dirty or restricted Clean coil or remove restriction

Dirty air filter Replace filter

Dirty condenser coil Clean coil

Refrigerant overcharged Recover excess refrigerant

Air in system

Low refrigerant charge Check for leaks, repair and recharge

Compressor valves leaking Replace compressor

Restriction in liquid tube Remove restriction

High heat load Check for source and eliminate

Compressor valves leaking Replace compressor

Refrigerant overcharged Recover excess refrigerant

Dirty air filter Replace Filter

Low refrigerant charge Check for leaks, repair, and recharge

Insufficient evaporator airflow

Outdoor ambient below 40°F Install low-ambient kit

Correct the direction of rotation by reversing the
3-phase power leads to the unit. Shut down unit

Recover refrigerant, evacuate system, and re-

charge to capacities shown on nameplate

Recover refrigerant, evacuate system, and re-

Recover refrigerant, evacuate system, and re-

Replace component

Lower thermostat setting below

room temperature

Check wiring and repair or replace

Determine cause

Replace compressor

Replace fuse or reset circuit breaker

Determine cause

to allow pressures to equalize.

Determine cause and replace

charge

charge

Increase air quantity

Check filter- replace if necessary

—22—

I. PRELIMINARY INFORMATION

Model No .............................................................................................................................................................

Serial No ..............................................................................................................................................................

Date .....................................................................................................................................................................

Technician ...........................................................................................................................................................

Job/ Location...............................................................................................................................................

II. PRE-START-UP

____ Verify that all packing materials have been removed from unit
____ Verify that condensate connection is installed per installation instructions
____ Check all electrical connections and terminals for tightness
____ Check that indoor (evaporator) air filter is clean and in place
____ Verify that unit installation is level
____ Check fan wheel propeller for location in housing and setscrew tightness

III. START-UP

Supply Voltage: L1-L2(C-S) __________ L2-L3(S-R) __________ L3-L1(R-C) __________
Compressor Amps: L1(C) __________ L2(S) __________ L3(R) __________
Indoor (Evaporator) Fan Amps: __________

TEMPERATURE

Outdoor (Condenser) Air Temperature: __________ DB
Return-Air Temperature: __________ DB __________ WB
Cooling Supply Air: __________ DB __________ WB

PRESSURES

Refrigerant Suction __________ psig
Suction Line Temp*__________
Refrigerant Discharge __________ psig
Discharge Temp† __________
____ Verify Refrigerant charge using charging tables
____ Verify that 3-phase scroll compressor (701A048 and 702A030–060) is rotating in correct direction.

START-UP CHECKLIST

(REMOVE AND STORE IN JOB FILE)

* Measured at suction inlet to compressor

† Measured at liquid line leaving condenser

—23—

© 2006 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231

—24—

Printed in U.S.A. Catalog No. II 701A-30-1