Liquid pipe
Gas pipe
Valve
cap
Vacuum
gauge
Vacuum pump
Fig. 5
Chassis
Outdoor drain
fitting
Electrical Wiring
1. Disassemble handle on front or right-hand side plate of
outdoor unit.
2. Remove wire clamp. Connect power connection cable to
line bank. Connections should be same as for indoor
unit.
3. Use the wire clamp to connect the power connection
cable on heating and cooling units, then the signal
control wire. Then connect the corresponding
connectors.
4. Verify that all connections are secure.
5. Reinstall the handle.
NOTE:
• Incorrect wiring can cause malfunction.
• Be sure there is adequate spacing between the wires.
INSTALLING THE OUTDOOR UNIT
Leakage Test
1. Connect the charging hose of the manifold valve to
charge the end of the low-pressure valve.
NOTE:
Both high- and low-pressure valves must be
tightly closed.
2. Add dry nitrogen to a pressure of 200 lbs and leak test
fl are fi ttings with soap bubbles. If no leak is detected,
release nitrogen and evacuate system to below
500 microns.
3. Connect the joint of the charging hose to the vacuum
pump.
4. Open the handle of the Lo manifold valve.
5. Open the vacuum pump to evacuate the hose. When
the charging is beginning, loosen the joint nut on the low-
pressure valve to check airfl ow. If readings are accurate
(0 on the multi-meter), retighten the nut.
6. Continue evacuating for at least 15 minutes. Be sure the
reading on the vacuum gage is 500 microns or less.
7. Remove the charging hose from the low-pressure end of
the low-pressure valve.
8. Tighten the bonnet of the low-pressure valve.
(See Fig. 5.)
Check for Leaks
Use soapy water or leak detector to verify joints,
connections and couplings are not leaking.
Outdoor Condensation Drainage
When the unit is heating, the condensing water and
defrosting water can be safely drained off through the drain
hose.
INSTALLATION:
Install the outdoor drain fi tting in the hole on the base plate;
then connect the drain hose, directing it so that the water
drains out safely.
19
Fig. 6
Indoor unit checkpoint
Indoor unit checkpoint
