ACNF Air Handler Installation Manual

5
2 ½
A
B
4 3/8
5
C
11 3/8
TOP VIEW
LIQUID LINE
SUCTION LINE
CONTROL BOX
10
21
¾
D
1
THIS END: LOW VOLTAGE WIRING
OPPOSITE END: SUPPLY VOLTAGE WIRING
Figure 5
SPECIAL INSTRUCTIONS
This airhandler comes equipped with an evaporator coil with a
check style flowrator assembly, an indoor blower and all neces-
sary internal electrical wiring. For most installations with match-
ing applications, no change to the flowrator orifice is required.
However, in mix-matched applications, a flowrator change may
be required. See the piston kit chart or consult your local distribu-
tor for details regarding mix-matched orifice sizing. If the mix-
match application requires a different piston size, change the
piston in the distributor on the indoor coil before installing the
coil and follow the procedure shown below.
T HE EVAPORATOR COIL IS SHIPPED FROM THE FACTORY WITH
APPROXIMATELY 200 PSI TRACER GAS CHARGE . U SE CAUTION WHEN
RELIEVING
PRESSURE .
IMPORTANT NOTE: Torch heat required to braze tubes of various
sizes is proportional to the size of the tube. Tubes of smaller size
require less heat to bring the tube to brazing temperature before
adding brazing alloy. Applying too much heat to any tube can melt
the tube. Service personnel must use the appropriate heat level for
the size of the tube being brazed.
NOTE: The use of a heat shield when brazing is recommended to
avoid burning the serial plate or the finish on the unit. Heat trap
or wet rags should be used to protect heat sensitive components
such as service valves and TXV valves.
T O PREVENT FEEDER TUBE DAMAGE , HOLD THE DISTRIBUTOR BODY WITH
A
3/4" OPEN END WRENCH WHEN REMOVING OR REPLACING THE
13/16" FLARE NUT .
CAUTION
1. Remove the valve core to allow high pressure tracer gas to
escape. No gas indicates a possible leak.
2. Remove the 13/16" flare nut and tailpiece.
3. Unsweat the access fitting on the tailpiece
4. Remove the check piston to verify it is correct and then re-
place the piston. See piston kit chart in instructions.
5. Unsweat the cap on the suction line.
6. Slide the 13/16" flare nut over the tailpiece.
7. Braze tailpiece to the lineset liquid tube.
8. Insert the suction line into the connection, slide the insula-
tion at least 18" away from the braze joint. Braze suction
line.
9. AFTER THE TAILPIECE HAS COOLED, confirm position of the
white Teflon® seal and hand tighten the 13/16" flare nut.
10. Torque the 13/16" flare nut to 7-25 ft-lbs. or tighten 1/6 of a
turn. Do not overtighten.
E XCESSIVE TORQUE CAN CAUSE ORIFICES TO STICK . U SE THE PROPER
TORQUE
SETTINGS WHEN TIGHTENING ORIFICES .
CAUTION
11. Replace suction line insulation.
12. After installation, evacuation and charging of the low side
is complete, check fittings for leaks.
NOTE: With the piston in the distributor, the seal end should
point inside the distributor body and should not be seen when
looking into the end of distributor. Make sure the piston is free to
rotate, and move up and down in the distributor body.