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Page 18
B: Special Section for KWIB120 Systems
Compressor Priority Switch - For KWIB12023 and KWIB12043. These KwiKool
models have 2 compressors and refrigerant circuits that operate independently of each
other and are staged to come on at different intervals as needed for cooling. Your
KwiKool KWIB120 is equipped with a Compressor Priority Switch located on the top of
the control box in the evaporator access compartment. The rocker switch is factory set
to use compressor 1 as the first stage compressor or lead compressor on start up, and
compressor 2 as the second stage or lag compressor. The lag compressor comes on
when the demand requires it. The rocker switch when moved to the compressor 2
position reverses the order of the lead and lag compressors. This allows for rotation of
the compressors for even wear. Change this switch position at regular intervals. Factory
recommendation is approximately every 6 months. Turn off the power to the unit
before changing this switch position.
Evaporator Fan Rotation - On KWIB120 models without the optional factory
installed phase monitor, you will have to visually confirm the rotation direction of the
cold air supply fan and correct if needed. As you face the front control panel of the
KwiKool unit, open the left side evaporator access door with the system in the OFF
position. Secure the door from closing and keep clear any objects from the moving or
rotating parts. Select FAN mode on your control pad and turn the system ON briefly
and then OFF. The supply air fan should be rotating in a clockwise direction from this
view. If rotating counterclockwise, qualified personal should disconnect power at the
source and exchange any incoming line voltage wire with any other line voltage wire and
repeat the previous instructions. Operating your KwiKool unit with the supply air fan
rotating incorrectly will cause low performance and evaporator coil freezing.
Note: KwiKool units with a factory installed phase monitor have already been set for
rotation. Users will be notified of incorrect rotation by an audio and visual alarm that will
clear automatically when the phase issue is corrected by exchanging the line voltage
wire as described above in this section.
Supply Air Fan Speed - KWIB120 models are 2 stage systems and have a fan
speed for each stage. This is not user settable. This system always start on 1st stage
fan speed (low) in COOL or FAN MODE, second stage fan speed (high) only operates
in COOL MODE when the second stage compressor is running.
Conditioned Air Supply Drive Belts - Your KwiKool KWIB120 models moves air
over the evaporator coil to remove heat and moisture from the conditioned space by
way of a motor attached to a blower wheel, this wheel turns by way of a pulley and belt
system. Inspect/adjust these belts every 60 days of operation, replace as needed.
Failure to maintain the drive belts will cause low performance, coil freezing or in extreme
cases damage to the blower/motor in the event of a belt breaking. The belts are located
in the left side evaporator access door as you face the control panel. When adjusting
the belts, adjust the tension using the base adjustment screw. Never adjust the sheave
(pulley) as it can cause damage to your system and/or make the system have poor
performance.
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