FIGURE 1
MIS-4078
CONTROL
BOX
4''
12.5"
Manual 7960-847B
Page
2 of 8
Installation
1. Disconnect all power to the unit. Remove control
panel inner and outer covers, upper front panel and
both right-side and left-side condenser inlet grilles.
2. Mount the fan speed control box as shown in
Figure 1 using the three self-tapping screws.
The dimensions for mounting the control box are
provided in Figure 1.
3. Remove service cap and attach the pressure
transducer and flare tee to the liquid line as shown
in Figure 2; re-install the service cap on the end of
the service tee. Check for leaks.
4. Attach the plug from the fan speed control box to the
pressure switch as shown in Figure 2.
5. Install outdoor temperature switch assembly to the
fan shroud and route wires through the bushing
and up to the control panel as shown in Figure 3
on page 4. This switch defeats Balanced Climate
airflow when the temperature falls below 50°F to
help prevent evaporator freeze up. Refer to the
unit installation manual for more information on
Balanced Climate operation.
6. Install freeze protect thermostat to the evaporator
coil as shown in Figure 4 on page 5. Route the
wires down through the copper bushing and into the
control panel with the blower motor wires.
7. Run all wires from the low ambient control
(LAC) box (except the ones going to the pressure
transducer) up through the bushing in the bottom
of the unit control box as shown in Figure 5 on
