Carrier 25HNA Infinity
Series Installation Instructions Manual page 6

ACCESSORY
Crankcase Heater
Evaporator Freeze Protection
Winter Start Control
Compressor Start Assist Capacitor
and Relay}
Low−Ambient Control
Support Feet
Liquid−Line Solenoid Valve
Ball−Bearing Fan Motor
Puron Refrigerant Balance Port
Hard−ShutOff TXV
* For tubing set lengths between 80 and 200 ft. horizontal or 20 ft. vertical differential (total equivalent length), refer to the Long Line Guideline Air Conditioners
and Heat Pumps using Puron® Refrigerant.
{Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
} Information is specific to 25HNA6 and 25HNA9 models.
Install Liquid−Line Filter Drier Indoor
Refer to Fig. 5 and install filter drier as follows:
1. Braze 5−in. liquid tube to the indoor coil.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to above 5−in. liquid tube. Flow arrow must
point towards indoor coil.
4. Connect and braze liquid refrigerant tube to the filter drier.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Installation of filter drier in liquid line is required.
Fig. 5 − Liquid−Line Filter Drier
Table 2—Accessory Usage
REQUIRED FOR
LOW−AMBIENT APPLICATIONS
(Below 55 5F)
Standard
Standard with Infinityt Control
(Low Ambient not allowed with non−
communicating thermostat)
Standard with Infinity Control
(Low Ambient not allowed with non−
communicating thermostat)
Standard on 25HNA6 models.
Not required on 25HNA9 models
since compressor always starts
unloaded.
Standard with Infinity Control
(Low
ambient not allowed with non−commu-
nicating thermostat)
Recommended
No
Standard
{
Yes
A05227
REQUIRED FOR LONG LINE
APPLICATIONS*
(Over 80 ft.)
Standard
No
No
Standard on 25HNA6 models.
Not required on 25HNA9 models
since compressor always starts
unloaded.
No
No
Yes
Standard
Yes{
Refrigerant Tubing connection Outdoor
Connect vapor tube to fitting on outdoor unit vapor service
valves (see Table 1).
Install Adapter Tube
1. Remove plastic retainer holding outdoor piston in liquid
service valve.
2. Check outdoor piston size with matching number listed on
unit rating plate.
3. Locate plastic bag taped to unit containing adapter tube.
4. Remove TeflonR washer from bag and install on open
end of liquid service valve.
5. Remove adapter tube from bag and connect threaded nut
to liquid service valve. Tighten nut finger tight and then
with wrench tighten an additional 1/2 turn (15 ft−lb).
DO NOT OVERTIGHTEN!
Sweat Connections
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Service valves must be wrapped in a heat−sink
material such as a wet cloth.
Use refrigerant grade tubing. Service valves are closed from
factory and ready for brazing. After wrapping service valve with
a wet cloth, braze sweat connections using industry accepted
methods and materials. Consult local code requirements.
Refrigerant tubing and indoor coil are now ready for leak testing.
This check should include all field and factory joints.
6
REQUIRED FOR SEA
COAST APPLICATIONS
(Within 2 miles)
Standard
No
No
Standard on 25HNA6
models.
Not required on 25HNA9
models since compressor
always starts unloaded.
No
Recommended
No
Standard
{
Yes