Bryant 661C, 661S, 661G User Manual

installation and

661C, G

start-up instructions

10 SEER
SPLIT-SYSTEM
HEAT PUMP

NOTE: Read the entire instruction manual before starting the
installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thor­oughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.

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

Understand the signal words DANGER, WARNING, and CAU­TION. These words are used with the safety-alert symbol. DAN­GER identifies the most serious hazards which willresultinsevere
personal injury or death. WARNING signifies hazards 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.

661S

Cancels: II 661C-18-6 II 661C-18-7

2-02

.

A94355

Fig. 1—Models 661C

WARNING: Before installing, modifying, or servicing

system, main electrical disconnect switch must be in the
OFF position. There may be more than 1 disconnect
switch. Lock out and tag switch(es) with a suitable
warning label. Electrical shock can cause personal injury
or death.

INSTALLATION RECOMMENDATIONS

NOTE: In some cases noise in the living area has been traced to

gas pulsations from improper installation of equipment.

1. Locate unit away from windows, patios, decks, etc. where
unit operation sounds may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate
to capacity of unit.

3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.

4. Leave some slack between structure and unit to absorb
vibration.

5. When passing refrigerant tubes through the wall, seal
opening with RTV or other pliablesilicon-basedcaulk. (See
Fig. 3.)

A98524

Fig. 2—Models 661G and 661S

6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which comes in direct contact with
tubing. (See Fig. 3.)

8. Ensure that tubing insulation is pliable and completely
surrounds vapor tube.

9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 3.)

10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.

—1—

Avoid contact between tubing and structureNOTE:

OUTDOOR WALL INDOOR WALL

CAULK

INSULATION

THROUGH THE WALL

HANGER STRAP

(AROUND VAPOR

TUBE ONLY)

1″ MIN.

SUSPENSION

LIQUID TUBE

VAPOR TUBE

JOIST

INSULATION

VAPOR TUBE

LIQUID TUBE

A94208

Fig. 3—Connecting Tube Installation

When outdoor unit is connected to factory-approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
indoor unit of the same size when connected by 15 ft of
field-supplied or factory accessory tubing. For proper unit opera­tion, check refrigerant charge using charging information located
on control box cover.

IMPORTANT: Maximum liquid-line size is 3/8-in. O.D. for all
residential applications including long line.

IMPORTANT: Always install a liquid-line filter drier. Refer to
Product Data Sheet for appropriate part number. Obtain filter drier
from service parts or your distributor or branch.

INSTALLATION

I. CHECK EQUIPMENT AND JOB SITE
A. Unpack Unit

Move to final location. Remove carton taking care not to damage
unit.

B. Inspect Equipment

File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit service
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.

II. INSTALL ON A SOLID, LEVEL MOUNTING PAD

If conditions or local codes require the unit be attached to pad, tie
down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 4
to determine base pan size and knockout hole location.

On rooftop applications, mount on level platform or frame 6 in.
above roof surface. Place unit above a load-bearing wall and
isolate unit and tubing set from structure. Arrange supporting
members to adequately support unit and minimize transmission of
vibration to building. Consult local codes governing rooftop
applications.

Roof mounted units exposed to winds above 5 mph may require
wind baffles to achieve adequate defrost. Consult Low-Ambient
Guideline for wind baffle construction.

C

3

⁄8″D. (9.53) TIEDOWN

A

B

KNOCKOUTS (2) PLACES

A94199

DIMENSIONS (IN.)

UNIT
SIZE

018—030 22-1/2 X 22-1/2 3-11/16 18-1/8 14-3/8
042—060 30 X 30 6-1/2 23-1/2 20

MINIMUM

MOUNTING PAD

DIMENSIONS

TIEDOWN KNOCKOUT LOCATIONS

ABC

Fig. 4—Mounting Unit to Pad

NOTE: Unit must be level to within ± 2° (± 3/8 in./ft) per

compressor manufacturer specifications.

III. CLEARANCE REQUIREMENTS

When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a 6-in.
clearance on 1 side of unit and 12 in. on all remaining sides must
be maintained. Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.

On rooftop applications, locate unit at least 6 in. above roof
surface.

IV. OPERATING AMBIENTS

The minimum outdoor operating ambient in cooling mode is 55°F,
and the maximum outdoor operating ambient in cooling mode is
125°F. The maximum outdoor operating ambient in heating mode
is 66°F.

V. ELEVATE UNIT

CAUTION: Accumulation of water and ice in base pan

may cause equipment damage.

In areas where prolonged freezing temperatures are encountered,
elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of unit.

VI. CHECK INDOOR AND OUTDOOR CHECK-FLO­RATER® PISTON

Check indoor coil piston to see if it matches the required piston
shown on outdoor unit rating plate. If it does not match, replace
indoor coil piston with piston shipped with outdoor unit. The
piston shipped with outdoor unit is correct for any approved indoor
coil combination.

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TABLE 1—REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID AND VAPOR TUBE DIAMETERS (IN.)

UNIT
SIZE

018, 024 3/8 3/8 5/8 5/8 5/8 3/4
060, 036 3/8 3/8 3/4 3/4 3/4 7/8
042, 048 3/8 3/8 7/8 7/8 7/8 1-1/8

060 3/8 3/8 7/8 1-1/8 7/8 1-1/8

NOTES:

1. Tube Diameters are for lengths up to 50 ft or 20 ft vertical differential. For tubing lengths greater than 50 ft, consult the Application Guideline and Service Manual for Air
Conditioners and Heat Pumps Using R-22 Refrigerant.

Connection Diameter Tube Diameter Connection Diameter Tube Diameter Connection Diameter Tube Diameter

LIQUID VAPOR VAPOR (LONG LINE)

CAUTION: Remove indoor coil piston if unit is to be

installed on system with a TXV metering device.

Check outdoor unit piston. Remove retainer on liquid service valve
and check piston size with matching number listed on outdoor unit
rating plate.

VII. CHECK DEFROST THERMOSTAT

Check defrost thermostat to ensure it is properly located and
securely attached. 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. O.D. stub tube approximately 2 in.
long. (See Fig. 5.) 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

CAUTION: To prevent damage to unit or service valves
observe the following:

•Use a brazing shield.

•Wrap service valves with wet cloth or use a heat-sink

material.

Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 50 ft in length
or 20 ft vertical differential, substantial capacity and performance
losses can occur. Following the recommendations in the Residen­tial Split System Long-Line Application Guideline will reduce
these losses. Refer to Table 1 for field tubing equivalent line
length.

If refrigerant tubes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system.

A. Outdoor Unit Connected to Factory-Approved In­door Unit

Outdoor unit contains correct system refrigerant charge for opera­tion with indoor unit of same size when connected by 15 ft of
field-supplied or factory-accessory tubing. Check refrigerant
charge for maximum efficiency.

B. Refrigerant Tubing

Connect tubing to fittings on outdoor unit vapor and liquid service
valves. (See Table 1.) Use refrigerant grade tubing. Refer to
appropriate section below for type of service valves installed on
unit.

C. Sweat Connection

Fig. 5—Defrost Thermostat Location

VIII. MAKE PIPING CONNECTIONS

WARNING: 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.

CAUTION: If ANY refrigerant tubing is buried, provide
a 6 in. vertical rise at service valve. Refrigerant tubing
lengths up to 36 in. may be buried without further special
consideration. For lengths above 36 in., consult your local
distributor.

A97517

CAUTION: To avoid valve damage while brazing, ser­vice valves must be wrapped in a heat-sinking material
such as a wet cloth.

Remove plastic retainer holding outdoor piston in liquid service
valve and connect sweat/flare adapter provided to valve. (See Fig.

6.) Connect refrigerant tubing to fittings on outdoor unit vapor and
liquid service valves. Service valves are closed from factory and
ready for brazing. After wrapping service valve with a wet cloth,
tubing set can be brazed to service valve using either silver bearing
or non-silver bearing brazing material. Consult local code require­ments. Refrigerant tubing and indoor coil are now ready for leak
testing. This check should include all field and factory joints.

D. Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor

and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.

—3—