Installation guide

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SENSING
BULB
UALIZER
TUBE
EXPANSION
VALVE
A98533
Fig. 4_Accessory Support Feet
Step 6--Check Indoor Expansion Device
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For proper unit operation and reliability, units must be
installed with hard shutoff TXV specifically designed to
operate with Puron,_,P4.Do not use an R-22 TXV. Do not install
with evaporator coils having capillary tube metering devices
or pistons.
For TXV kit part number and charging instructions, refer to TXV
label in outdoor unit.
FURNACE (;OILS
If TXV installation is required, remove existing AccuRater® from
indoor coi!. Refer to Fig. 5 and 6 and install TXV kit (specifically
designed for PuronJ_0 as follows:
i. Install suction tube adapter.
2. Install liquid flare-to-sweat adapter.
3. Connect external equalizer tube to fitting on suction tube
adapter.
4. Position sensing bulb on horizontal portion of suction tube
adapter. Secure using supplied hardware.
5. Insulate bulb after installation. (See Fig. 6.)
6. Leak check all connections.
FAN COILS
If indoor unit (fan coil) comes factory equipped with a bi-flow
hard shut off TXV specifically designed for Puron_K, no TXV
change is required.
If TXV installation is required, refer to TXV kit Installation
Instructions for details on TXV installation.
Step 7--Check Defrost Thermostat
Check defi'ost 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 3 in.
A91277
Fig. 5--Typical TXV Installation
long. (See Fig. 7.) The defrost themlostat 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.
Step 8--In Long-Line Applications, Install Liquid-Line
Solenoid Valve (LSV)
For reliigerant piping an'angements with equivalent lengths
greater than 50 ft and.or when elevation difference between indoor
and outdoor unit is greater than ±20 It, follow all requirements of
the Long-Line Guideline section in the Application Guideline and
Service Manual Air Conditioners and Heat Pumps Using Pu-
ron'K Refi'igerant.
If required by Long-Line Application Guideline, install LSV kit
Part No. KHALS0401LLS specifically designed for Puron(P_ Heat
Pump. LSV should be installed within 2 ft of outdoor unit with
flow an'ow pointing toward outdoor unit Follow the Installation
Instructions included with accessory kit.
IMPORTANT: Flow arrow must point toward outdoor unit.
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7/8 IN. OD & SMALLER LARGER THAN 7/8 IN. OD
A81032
Fig. 6--Positioning of Sensing Bulb
Step 9--Make Piping Connections
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Relieve pressure and recover all refi'igerant 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.