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HP ONLY
COOLING ONLY
A09545
Fig. 25 -- Thermostat Wire Connection for 40QAC
Heating Only
Fig. 26 -- Thermostat Wire Connection for 40QAQ
Reassemble Indoor Unit
1. Reinstall filters and inlet grilles
2. Reinstall the side panels
START--UP
Preliminary Checks
1. Check condensate drainage system; on the opposite side of
the drain connection, insert a water bottle up into the fan
coil unit and fill the drain pan (see Fig. 27). Water must
flow steadily; if not, check the pipe slope or inspect for any
pipe restrictions.
A09538
Fig. 27 -- Inserting Water Into Drain Pan
2. Make sure all wiring connections are correct and they are
tight.
3. Field electrical power source must agree with unit name
plate rating.
4. Check that all barriers, covers, and panels are in place. En-
sure that the filters and return--air grilles on the indoor unit
have been installed and that the discharge louvers are posi-
tioned correctly.
5. All service valves must be closed.
6. On units with crankcase heaters, ensure belly--band heaters
are tight around the compressor.
Evacuate and Dehydrate the System
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Never use the system compressor as a vacuum pump.
Using Vacuum
Pump
1. Completely tighten flare nuts A, B, C, D, connect manifold
gage charge hose to a charge port of the low side service
valve. (See Fig. 28.)
2. Connect charge hose to vacuum pump.
3. Fully open the low side of manifold gage. (See Fig. 29.)
4. Start vacuum pump
5. Evacuate using either deep vacuum or triple evacuation
method.
6. After evacuation is complete, fully close the low side of
manifold gage and stop operation of vacuum pump.
7. The factory charge contained in the outdoor unit is good for
up to 25 ft. (8 m) of line length. For refrigerant lines longer
than 25 ft (8 m), add 0.3 oz. per foot of extra piping up to
the maximum allowable length.
8. Disconnect charge hose from charge connection of the low
side service valve.
9. Fully open service valves B and A.
10. Securely tighten caps of service valves.
Outdoor Unit
Indoor Uni
t
Refrigerant
Service Valve
Low Side
High Side
A
B
C
D
A07360
Fig. 28 -- Service Valve
40QAC/38HDR -- 40QAQ/38QR
R