Unit installation

8
2)
the supply air registers will need to be added;
3) the return air duct inner perimeter will need to be
enlarged;
4)
the return air duct will need to be shortened;
5)
all of the above.
It is strongly recommended that all air distribution systems be
tested in a floor mock-up prior to installation in the vehicle. In
doing so, the vehicle manufacturer can ensure that air volume,
distribution and noise levels can be determined.
Any ducting exposed to the outdoor environment must be
sealed and insulated to prevent heat transfer and decreased
system performance.
9. 115 VAC ELECTRICAL WIRING
1.
WARNING - SHOCK HAZARD
To prevent the possibility of severe personal
injury or equipment damage due to electrical
shock, always be sure the electrical power is
disconnected or off before beginning
installation.
2. This heat pump contains a dual compressor
refrigeration system. The two compressors can either
cycle independently or operate in tandem.
Each compressor is connected to a separate
refrigeration circuit and a separate electrical circuit.
The first compressor and refrigeration circuit to
operate when the thermostat is calling for cooling is
referred to as "1st Stage Cooling". The second
compressor and refrigeration circuit to operate is
referred to as "2nd Stage Cooling".
Both first and second stage cooling systems require
power from separate 115 volt electrical circuits. The
two separate circuits connect to a high voltage
terminal board in the air conditioner electrical box.
The high voltage terminal board is specifically labeled
for the two separate electrical connections. The
markings are for "CIRCUIT 1" and
"CIRCUIT 2".
"CIRCUIT 1" connections supply power for the 1st
stage cooling unit. "CIRCUIT 2" connections supply
power for the 2nd stage cooling unit.
On the terminal board, the termination point for
both circuit 1 and 2 is equipped with two high-
voltage wiring lugs. Each lug is identified with either
the word “BLACK” or “WHITE”.
DANGER - SHOCK HAZARD
To prevent electrical shock due to miswiring,
adhere to the following procedure:
1) Connect each circuit's black (115V to
GND) power lead to the "BLACK"
high voltage lug;
2) Connect each circuit's white (-0-V to
GND) power lead to the "WHITE"
high voltage lug;
3) Connect each circuit's green or bare
copper ground wire to the grounding
lugs located in the electrical box. The
high voltage grounding lugs for circuit
1 and 2 are located just left of the high
voltage terminal board.
3.
High Voltage Wiring Specifications
A) U.L. approval requires the power supply to
be copper conductors only with a minimum
size of #12 AWG.
B) To prevent voltage drops of greater than
10% during starting loads, adhere to the
following guideline:
For lengths greater than 50', use #10 AWG.
4. For circuit protection, adhere to the following
guidelines:
Time Delay Fuse - Maximum 20 AMP
Circuit Breakers -
(H.A.C.R. Type) - Maximum 20 AMP
(C.S.A.) - Maximum 20 AMP
5. High Voltage Routing Specifications
When routing the high voltage supply wiring for
both circuit 1 and 2, the following guidelines must be
followed:
A) Route all wiring per applicable local and
national electrical codes.