Carrier Base 25HBR Installation And Start-Up Instructions Manual page 4

ACCESSORY
Crankcase Heater
Evaporator Freeze Thermostat
Accumulator
Compressor Start-Assist
Capacitor and Relay
MotorMaster® Control,
or
Low-Ambient Pressure Switch
Support Feet
Liquid-Line Solenoid Valve
or
Hard-Shutoff TXV
Ball-Bearing Fan Motor
* For tubing line sets between 80 and 200 ft horizontal or 20 ft vertical differential (Total Equivalent Length), refer to Application Guideline and Service Manual.
† Required for low-ambient controller (full-modulation feature) and MotorMaster® Control only.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper unit operation.
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.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper unit operation.
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 80 ft, substan-
tial 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. Refer to Table 2 for
accessory requirements.
There are no buried line applications greater than 36 in.
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.
OUTDOOR UNIT CONNECTED TO FACTORY APPROVED
INDOOR UNIT
Outdoor unit contains correct system refrigerant charge for opera-
tion with indoor unit of same size when connected by 15 ft of
field-supplied or factory accessory tubing and a factory-supplied
filter drier. Check refrigerant charge for maximum efficiency.
REFRIGERANT TUBING AND SWEAT CONNECTIONS
Connect vapor tubing to fittings on outdoor unit vapor service
valves. (See Table 1.) Connect liquid tubing to adapter tube on
liquid service valve. Use refrigerant grade tubing.
Table 2—Accessory Usage
REQUIRED FOR
REQUIRED FOR
LOW-AMBIENT
APPLICATIONS IN
APPLICATIONS
SNOW BELT REGION
(BELOW 55°F)
Standard (if required)
No
Standard
No
No
Yes Recommended
No
No
REQUIRED FOR
LONG-LINE
APPLICATIONS*
Yes Yes
Yes No
No Yes
Yes Yes
Yes No
No
See Long-Line
No Application
Guideline
Yes† No
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
To avoid valve damage while brazing, service valves must be
wrapped in a heat sink 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.
PISTON BODY
Fig. 6—Liquid Service Valve
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.
4
REQUIRED FOR
SEA COAST APPLICATIONS
(WITHIN 2 MILES)
No
No
Standard
No
No
Recommended
No
No
PISTON
PISTON
RETAINER
SWEAT/FLARE ADAPTER
A05226