Carrier 38MGQ Installation Instructions Manual page 17

INSTALL ALL POWER, INTERCONNECTING
WIRING, AND PIPING TO INDOOR UNIT
1. Run interconnecting piping and wiring from the outdoor
unit to the indoor unit.
2. Run interconnecting cable through the hole in the wall
(outside to inside).
3. Lift the indoor unit into position and route the piping and the
drain through the hole in the wall (inside to outside). Fit the
interconnecting wiring into the back side of the indoor unit.
4. Put an upper claw at the back of the indoor unit on the
upper hook of the Mounting Plate. Move the indoor unit
from side to side to ensure it is securely hooked.
5. Open the front cover of the indoor unit and remove the field
wiring terminal block cover.
6. Pull the interconnecting wire up from the back of the indoor
unit and position in close to the terminal block on the
indoor unit.
7. Push the lower part of the indoor unit up on the wall, then
move the indoor unit from side to side, up and down to
ensure it is hooked securely (see Fig. 20).
Fig. 20 --- Indoor Unit Installation
8. Connect wiring from the outdoor unit per connection
diagram.
9. Replace the field wiring cover and close the front cover of the
indoor unit.
Upper hook
Lower hook
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10. Connect the refrigerant piping and the drain line outside of
the indoor unit. Complete the pipe insulation at the flare
connection then fasten piping and wiring to the wall as
required. Completely seal the hole in the wall.
11. Connect the drain line. The drain line must not have a trap
anywhere in its length, must pitch downwards, and must be
insulated up to the outside wall (see Fig. 21).
Proper Do not form a rise
Fig. 21 --- Proper Drain Hose Installation
NOTE: For proper orientation of the refrigerant piping,
electrical cable and drain lines, refer to Fig. 22.
Indoor unit
Interconnecting
Wiring
Drain Piping
Fig. 22 --- Proper Orientation
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Do not put drain end into water
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Refrigerant Piping
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Tape
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