Installation guide

NOTE: FK4 and FC4 _hn coils are equipped with an R=22 TXV
If an FK4 o1"an FC4 fire coil is used with a Puron;R; air conditioner,
the R=22 TXV must be replaced with a Puron® TXV or with the
accessory piston body kit and piston shipped with outdoor unit.
STRAINER
FLARE
ADAPTOR
LIQUID LINE STRAINER
_APPROX 2" LONG
L STRAINER LABEL
(AFFIX TO LIQ. LINE
NEAR STRAINER LOCATION)
A95615
Fig. 4--AccuRateNg) Components
(38TXA, 38TZA, 38TPA Only)
To avoid improper per%finance and possible equipment
failme, remove indoor coil piston if"unit is to be installed on
system with a TXV metering device,
IMPORTANT: 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 dne to debris if inlet tube is fi_cing down. A
factory=approved filter drier 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 _n
coils
3. Remove and discard _Sctory=installed 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 body, TXV will not
function properly.
l
t . * 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 robing or valve Sweat inlet of
TXV, marked "IN" to liquid line Avoid excessive heat which
could damage valve.
6 Install vapor elbow with equalizer adapter to suction tube of
line set and suction connection to indoor coil. Adapter has a
1/4-in. male connector fbr attaching equalizer tube
7 Connect equalizer robe of TXV to li4-in equalizer fitting on
vapor line adapter.
g Attach TXV bulb to horizontal section of suction line using
clamps provided Insulate bulb with field=supplied insulation
tape See Fig. 5 for correct positioning of sensing bulb.
9 Proceed with remainder of unit installation.
SENSING
4 O'CLOCK
7/8IN. OD & SMALLER LARGER THAN 7/8 IN. OD
A81032
Fig. g--Position of Sensing Bulb
Replacing TXV on R-22 Indoor Coil
1 Pump system down to 2 psig and recover refrigerant
2 Remove coil access panel and fitting panel flora _?ont of'
cabinet.
3. Remove TXV support clamp using a 5/16-in. nut &iver. Save
the clamp.
4. Remove R=22 TXV using a baclcup wrench on flare connec-
tions to prevent damage to tnbing.
5. Using wire cutters, cut equalizer robe offflush with vapor robe
inside cabinet.
6. Remove bulb fi'om vapor robe inside cabinet.
7. Braze equalizer stub-robe closed. Use protective battier as
necessary to prevent damage to drain pan.
IMPORTANT: Route d-_e equalizer tube of Puron TXV through
suction line connection opening in fitting panel prior to replacing
fitting panel around tubing.
8. Install TXV with 3/8=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 suppolq _ 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 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 robe.