Applications - Northwind MAC1211 Engineering, Installation And Service Manual

FAN ONLY OPERATION
When fan only operation is desired, turn the thermostat dial to desired comfort level and switch fan cycle switch to
"constant" position. The fan cycle switch is located in the cord storage compartment on the unit's back panel. With the
switch in "constant" position, the evaporator fan will operate even when the call for cooling is satisfied. Select desired
fan speed from the control panel. To cycle (turn off) the evaporator fan with the compressor, switch the fan cycle
switch to "cycle".
COOLING CYCLE
To operate the unit for cooling, plug the electric cord into a proper power supply. The green "power ready " light
should be lit. If the green light is not illuminated, there is probably no power at the outlet. Turn the temperature dial to
the right (clockwise) to turn the unit on, selecting the desired comfort number. The unit will run until the call for cool-
ing is satisfied. The temperature sensing bulb is located behind the evaporator filter and in front of the evaporator coil.
This is the best position for sensing the room temperature. With the unit running, if the dial is turned to the left
(counterclockwise) to turn the unit off, and then immediately turned to the right (clockwise), to turn it back on, the unit
will not start. The time delay will not allow the unit to run until the delay period ends, usually 4 to 5 minutes. This is
normal and protects the compressor from damage. If there is a power failure, the unit will resume operation when
power is restored. No re-starting is required. Operation will be as though there was no power failure at all. No batteries
of any kind are required for the thermostat or any operating function of the unit.
NorthWind units may be used in open areas to cool specific "spots" through the evaporator grille, optional nozzles or duct
adapter. Spot cooling can be an economical and convenient method to air condition where cooling the entire space is not
practical, such as factory floors, warehouses, gyms, stadiums and similar large areas.
NorthWind units can be used as room air conditioners to cool a room or confined space. This application requires using a
CAP (Condenser Air Plenum) and a CDF (Condenser Duct Flange) to duct condenser air into the unit and duct condenser
hot air out of the unit. If this ducting is not used, the space temperature will increase.
By using the optional EAP (Evaporator Air Plenum) and EDA (Evaporator Duct Adapter) it is possible to cool a space
remotely. The Plenum and Duct Adapter permit ducting of the evaporator air. In drop ceiling applications the unit could
be located in one room while ducting the supply and return air to another room. The "equivalent feet" guidelines must be
observed.
When a unit is installed in an area that is not totally enclosed, the hot condenser air may be ducted out, allowing the
evaporator air to cool the space. Consideration must always be given to the negative pressure created by the condenser air
exhaust and its effect on space temperature.

APPLICATIONS

SPOT COOLER
ROOM AIR CONDITIONER
REMOTE COOLER
AREA COOLER
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