Pub. No. 11-AC14D1-6
PAGE 3
INSTALLER'S GUIDE
8. Close valve on HCFC-22 supply cylinder. Close valves on
manifold gauge set and remove refrigerant charging hoses from
liquid and gas pressure tap ports.
NOTE: A 3/16" Allen wrench is required to open liquid line
service valve. A 1/4" Open End or Adjustable wrench is
required to open gas line valve. A 3/4" Open End wrench is
required to take off the valve stem cap.
9. The liquid line shut-off valve can now be opened. Remove shut-
off valve cap. Fully insert hex wrench into the stem and back out
counterclockwise until valve stem just touches rolled edge (ap-
proximately five [5] turns) observing
WARNING
statement on
page 2. See Figure 3.
10. Replace liquid service pressure tap port cap and valve stem
cap. These caps
MUST BE REPLACED
to prevent leaks. Re-
place valve stem and pressure tap cap finger tight, then tighten an
additional 1/6 turn.
11. The gas valve can now be opened. For a ball type gas valve,
open the gas valve by removing the shut-off valve cap and turning
the valve stem 1/4 turn counterclockwise, using 1/4" Open End or
Adjustable wrench. See Figure 4. For brass gas line service valve
opening, follow 9 and 10 above. See Figure 5.
12. The gas valve is now open for refrigerant flow. Replace valve
stem cap to prevent leaks. Again, these caps
MUST BE RE-
PLACED
to prevent leaks. Replace valve stem and pressure tap
cap finger tight, then tighten an additional 1/6 turn. See Figure 4.
If refrigerant lines are longer than 15 feet and/or a different
size than recommended, it will be necessary to adjust system
refrigerant charge upon completion of installation. See the unit
Service Facts.
E. ELECTRICAL CONNECTIONS
▲
WARNING:
When installing or servicing
this equipment, ALWAYS exercise basic safety precau-
tions to avoid the possibility of electric shock.
1. Power wiring and grounding of equipment must comply with
local codes.
2. Power supply must agree with equipment nameplate.
3. Install a separate disconnect switch at the outdoor unit.
4. Ground the outdoor unit per local code requirements.
5. Provide flexible electrical conduit whenever vibration trans-
mission may create a noise problem within the structure.
6. The use of color coded low voltage wire is recommended to
simplify connections between the outdoor unit, the AccuLink™
control and the indoor unit.
Table 1 — NEC Class II Wiring
NOTE: The maximum total cable length for the entire Comfort
Control communicating system is 500 ft. 18 AWG.
7. Mount the AccuLink™ control in accordance with instruction
included with the AccuLink™ control. Wire per appropriate hookup
diagram (included in these instructions).
F. COMPRESSOR START-UP
After all electrical wiring is complete, SET THE ACCULINK™
CONTROL SWITCH IN THE OFF POSITION SO COMPRES-
SOR WILL NOT RUN, and apply power by closing the system
Use soap bubbles or other leak-checking methods to see that all field
joints are leak-free! If not,
release pressure
; then repair!
SYSTEM EVACUATION
NOTE: Since the outdoor unit has a refrigerant charge, the gas and
liquid line valves must remain closed.
1. Upon completion of leak check, evacuate the refrigerant lines and
indoor coil before opening the gas and liquid line valves.
2. Attach appropriate hoses from manifold gauge to gas and
liquid line pressure taps.
NOTE: Unnecessary switching of hoses can be avoided and
complete evacuation of all lines leading to sealed system can be
accomplished with manifold center hose and connecting branch
hose to a cylinder of HCFC-22 and vacuum pump.
3. Attach center hose of manifold gauges to vacuum pump.
4. Evacuate until the micron gauge reads no higher than
350 microns.
5. Close off valve to vacuum pump and observe the micron gauge.
If gauge pressure rises above 500 microns in one (1) minute, then
evacuation is incomplete or system has a leak.
6. If vacuum gauge does not rise above 500 microns in one (1)
minute, the evacuation should be complete.
7. With vacuum pump and micron gauge blanked off, open valve
on HCFC-22 cylinder and charge refrigerant lines and indoor coil
with vapor to tank pressure of HCFC-22 supply.
NOTE: DO NOT VENT REFRIGERANT INTO THE
ATMOSPHERE.
CAP
1/4 TURN ONLY
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
UNIT SIDE
OF VALVE
PRESSURE TAP PORT
GAS LINE BALL SERVICE VALVE
4
GAS LINE SERVICE VALVE
5
AccuLink™ Control Wiring
WIRE SIZE
MAX. WIRE LENGTH
18 AWG
250 FT
