Airmark GAS Series, Руководство по установке

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IO-123114 Effective 12-04-2014 7
If the TXV sensing bulb is mounted verti-
cally, the capillary MUST be directed up-
wards. The bulb must be mounted on the
wall opposite to that being directly hit by the refrigerant and
oil leaving the distributor tubes.
CAUTION
!
II. TXV Bulb Vertical Mounting
Fig 8B-3. Recommended location
for vertical TXV bulb mount
As recommended in Section
8B-I, the TXV sensing bulb
should be mounted in a hori-
zontal plane in relation to the
suction/vapor line. However,
some installation configura -
tions may require that the
sensing bulb be mounted ver-
tically. In this instance, place
the bulb opposite the piping
wall being hit by refrigerant
and oil leaving the distributor
tubes, and with capillary tubes
directed upwards as shown in
Fig. 8B-3.
Note: Photos are for basic illustration purposes only. Actual equip-
ment configuration may differ from that shown.
III. Field-Installed TXV Retrofit
When installing an expansion valve, it is not necessary to slide the
coil out of the housing.
III-1. Inspect the TXV box to confirm that the valve is compatible
with the refrigerant in the system.
Male
(Inlet)
Female
(Outlet)
III-2. Remove the valve from
the box and note the loca -
tion of the inlet side (threaded
male port) and the outlet side
(female swivel nut port).
III-5. Braze the stub-out portion to the liquid line and let cool.
III-4.
Slide the attachment nut onto the liquid line stub out
(See 8A, I-3)
Do not attempt to touch brazed joints
while hot. Severe burns may result.
!
WARNING
III-3. After ensuring that the
Teflon O-ring seal is still in place
inside the flowrator body, screw
the female swivel nut onto the
flowrator body.
III-6. Remove the additional Tef -
lon O-ring seal from the box and
place on the shoulder just inside
the TXV inlet port. Screw the nut
attached to the stub-out portion of
the flowrator body onto the inlet
port of the TXV.
A. Remove the valve stem from
the Schrader port mounted on the
suction line.
III-7. Tighten all connections taking care to use proper back up.
III-9a. Some Aspen coils come with a Schrader valve on the suction
line. If a Schrader port is present:
III-8. Remove the valve identification sticker from the valve and
place it adjacent to the Aspen model number on unit name plate.
For disassembly and piston removal refer to section 8A-I.
B. Screw flare nut on TXV equal -
ization tube on to the Schrader
valve stem.
III-9b. In some cases, a suction line schrader port may not be pres -
ent.
If a Schrader port is NOT present:
When handling or manipulating the equal-
izer tube, take great care not to kink or
make extreme bends in the tubing.
CAUTION
!
A. Install a field-supplied braze-on schrader
valve like that shown on the suction line near the
intended sensing bulb mounting location. Fol-
low valve manufacturer instructions and recom-
mendations for installation.
B. Attach equalizer tube to valve as described in
section III-9a above.
III-10. Mount the sensing bulb as described in section 8B-I or 8B-II.