Installation guide

HEX BODY
_-COPPERTUBE
A01164
Fig. 4_AccuRater® Components {38EZG Use)
Remove indoor coil piston if unit is to be installed on system
with a TXV metering device.
INPORTANT: The TXV should be mounted as close to the
indoor coil as possible and in a vertical, upright position. Avoid
mounting the inlet tube vertically down. Valve is more susceptible
to malfunction due to debris if inlet tube is fScing down. A factoQ"
approved filter-&ier must be installed in the liquid line.
INSTALLING TXV IN PLACE OF PISTON
1. Pump system down to 2 psig and recover refi'igerant.
2. Remove hex nut from piston body. Use backup wrench on fhn
coils.
3. Remove and discard _Sctoryoinstalled piston. Be sure Teflon
seal is in place.
4. Reinstall hex nut. Finger tighten nut plus 1/2 turn.
NOTE: If the piston is not removed flora the bo@, TXV will not
function properly.
H
: 0 J
To prevent damage to the unit, use a brazing shield and wrap
TXV with wet cloth or use heat sink material
5. Install TXV on indoor coil liquid line. Sweat swivel adapter to
inlet of indoor coil and attach to TXV outlet Use backup
wrench to avoid damage to tnbing or valve Sweat inlet of
TXV, marked _'IN" to liquid line Avoid excessive heat which
could damage valve.
6. Install vapor elbow with equalize* adapter to suction robe of
line set and suction connection to indoor coil Adapter has a
1/4 in. male connector _br attaching equalize* tube
7. Connect equalizer robe of TXV to 1/4 in. equalizer fitting on
vapor line adapter.
8. Attach TXV bulb to horizontal section of suction line using
clamps provided. Insulate bulb with fieldosupplied insulation
tape. See Fig. 5 tbr con'ect positioning of sensing bulb.
9. Proceed with remainder of unit installation.
REPLACING TXV ON Ro22 INDOOR (OIL
1. Pump system down to 2 psig and recover refi'igerant.
2. Remove coil access panel and fitting panel fiom front of
cabinet.
3. Remove TXV support clamp using a 5/16-in. nut driver. Save
the clamp.
4. Remove Ro22 TXV using a backup wrench on flare conneco
tions to prevent damage to tubing.
5. Using wire cutters, cut equalizer robe off flush with vapor robe
inside cabinet.
6. Remove bulb flora vapor robe inside cabinet.
7 Braze equalizer stub-robe closed. Use protective bmTier as
necessary to prevent damage to drain pan.
ff_PORTANT: Route the equalizer tube of Puron¢<; TXV through
suction line connection opening in fitting panel prior to replacing
fitting panel around tubing.
8. Install TXV with 3/8oin. 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 robe inside cabinet, in same
location as original was when removed, using supplied bulb
clamps (nylon or copper). See Fig. 5 for con'ect positioning of
sensing bulb.
11 Route equalizer robe through suction connection opening
(large hole) in fitting panel and install fitting panel in place
12 Sweat inlet of TXV, marked IN, to liquid tine Avoid
excessive heat which could damage valve.
13 Install vapor elbow with equalizer adapter to vapor tine oftine
set and vapor connection to indoor coil. Adapter has a 1/4 in
male connector for attaching equalizer robe.
14 (onnect equalizer robe of TXV to 1/4 in. equalize*" fitting on
vapor line adapter. Use backup wrench to prevent damage to
equalizer fitting.
15. Proceed with remainder of unit installation.
with a TXV metering device
Step 7--Making Piping Connections
Relieve pressure and recover all refi'igerant before system
repair or final unit disposal to avoid personal iriim'y,,-or death.
Use all service ports and open all flow-control devices,
including solenoid valves.
Do not leave system open to atmosphere any longer than
nainimum required _br installation POE oil in compressor is
extremely susceptible to moisture absorption Always keep
ends of robing sealed during installation.