Installation guide

_10 O'CLOCK
2 O'CLOCK 7
__ _ SENSING BULB
TRAP
SUCTION TUBE
8 O'CLOCK 4 O'CLOCK
7/8 IN, OD & SMALLER LARGER THAN 7/8 IN. OD
A81032
Fig, 4 - Position of Sensing Bulb
Replacing TXV on Puron Indoor Coil
1. Pump system down to 2 psig and recover refrigerant.
2. Remove coil access panel and fitting panel from front of
cabinet.
3. Remove TXV support clamp using a 5/16-in. nut driver.
Save the clamp.
4. Remove Puron TXV using a backup wrench on flare
connections to prevent damage to tubing.
5. Using wire cutters, cut equalizer tube off flush with vapor
tube inside cabinet.
6. Remove bulb from vapor tube inside cabinet.
7. Braze equalizer stub-tube dosed. Use protective barrier as
necessary to prevent damage to drain pan.
IMPORTANT: Route the equalizer tube of R-22 TXV through
suction line connection opening in fitting panel prior to replacing
fitting panel around tubing.
8. Install TXV with 3/S-in. copper tubing through small hole
in service panel. Use wrench and backup wrench, to avoid
damage to tubing or valve, to attach TXV to distributor.
9. Reinstall TXV support clamp (removed in item 3).
10. Attach TXV bulb to vapor tube inside cabinet, in same
location as original was when removed, using supplied
bulb clamps (nylon or copper). See Fig. 4 for correct
positioning of sensing bulb.
11. Route equalizer tube through suction connection opening
(large hole) in fitting panel and install fitting panel in
place.
12. Sweat inlet of TXV, marked "IN" to liquid line. Avoid
excessive heat which could damage valve.
13. Install vapor elbow with equalizer adapter to vapor line of
line set and vapor connection to indoor coil. Adapter has
a 1/4-in. male connector for attaching equalizer tube.
14. Connect equalizer tube of TXV to 1/4-in. equalizer fitting
on vapor line adapter. Use backup wrench to prevent
damage to equalizer fitting.
15. Proceed with remainder of unit installation.
STEP 6 --Make Piping Connections
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could result in personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal. Use all service
ports and open all flow-control devices, including
solenoid valves.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper 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. Do not
bury lines more than 36-in.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipnmnt
damage or improper 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. Rated tubing diameters
shown in Table 1 are recommended up to 80 ft. See Product
Data for acceptable alternate vapor diameters and associated
capacity losses. For tubing requirements beyond 80 ft.,
substantial capacity and performance losses can occur. Following
the recommendations in the Longline Guideline will reduce these
losses. Refer to Table 1 for field tubing diameters. Refer to Table
2 for accessory requirements.
There are no buried-line applications greater than 36-in. allowed.
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 Factolw Approved Indoor Unit
OuMoor unit contains correct system refrigerant charge for
operation with factory approved ARI rated indoor unit when
connected by 15 ft. of field-supplied or factory-accessory tubing,
and factory supplied filter drier. Check refrigerant charge for
maximum efficiency.
Refrigerant Tubing Connection Outdoor
Connect vapor and liquid tubes to fittings on vapor and liquid
service valves (see Table 1.) Use refrigerant grade tubing