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Installation
Figure 21: Remove the Escutcheon Plate and Control
Knob
8. While holding the control box in position, set the
escutcheon plate in place on the flanges beneath the
control door.
9. Using the two screws removed in Step 7, secure the
control box and escutcheon plate to the room cabinet.
10. Replace the thermostat control knob.
11. Connect the power cord from the heat section to the
bottom of the control box. Plug in the cord from the
control box to the receptacle in the cooling chassis.
12. Move the thermostat bulb to the cooling chassis and
secure it to the snap clips provided. Inspect the filter to be
sure it is securely in place.
13. Loosen the wing nuts on the nose piece that is attached
to the heat section. Slide the nose piece toward the room
cabinet until it makes contact. Tighten wing nuts to secure
the nose piece in place. This nose piece prevents air from
leaking back into the cabinet and giving the thermostat a
false reading.
14. Before replacing the front panel, replace the tie bar (if it
has been removed) and lock the latches. Then retrieve the
front panel and replace it by sliding it in and downward
into the room cabinet. See Figure 22.
Note: Tie bar latches must be in and locked before installing
the front panel.
15. Wipe cabinet with a soft cloth to remove smudges. If
required, use a mild, nonabrasive cleanser.
IM 1068-2 / Page 14 of 28
Figure 22: Unit Cabinet Assembly Details
Equipment Start-up
Initial start-up of the McQuay equipment by an experienced
person is usually the responsibility of the installing contractor.
This consists of inspecting and operating the equipment for
all functions at the time of initial installation, and making
adjustments as necessary. It also includes demonstrating its
proper operation to the owners or their agents.
Note: That unless otherwise specifically agreed to in writing,
there is no field labor or start-up service included in the
price of the equipment.
The Type K unit is furnished with a concealed fan cycle
rocker switch on the control box. Before start-up, open the
front panel and place this switch in the "cycle" position.
Continue start-up procedures as follows:
1. Check the main power supply to be sure there is power to
the unit.
2. Open the control access door and press the button labeled
F-Fan. The indoor fans should be energized.
3. Move the fan speed rocker switch from "Low Fan" to
"High Fan" and back again. The fan speed should change.
4. Depress the button marked H-Heat. Turn the thermostat
knob completely counterclockwise. The electric heat
elements or the hydronic valve should become energized
and noticeable heat should be felt at the discharge grille.
5. Depress the C-Cool button and move the thermostat
completely clockwise. The compressor and condenser fan
should come on and the air from the discharge should feel
cold.
6. Depress the S-Stop button and all functions of the unit
should stop.
The stop button does not disconnect power to the unit. Before
servicing the equipment, disconnect the unit from the power
source.
CAUTION
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