NOTE: All motors on this product are programmed for 60 sec time delay on tap 1 and 30 sec time delay on tap 2.
There is no time delay on tap 3. The indoor fan will remain on for the set time delay after G or W2 is de-energized.
COOLING OPERATION With a call for cooling (Y), the indoor fan, compressor, and the outdoor fan motor are
energized. When the cooling demand is met, Y de--energizes, shutting off the compressor, indoor fan, and the
outdoor fan.
CONTINUOUS FAN - With the continuous Indoor fan option selected on the thermostat, G is continuously energized.
The continuous fan speed will be the same as the cooling fan speed.
ELECTRIC RESISTANCE HEATING - If accessory electric heaters are installed, the thermostat energizes W, which
energizes the heater relay and in turn energizes the electric heaters. The thermostat terminal G must be energized
which starts the indoor--fan motor. If the heaters are staged, W2 is energized when the second stage of heating is
required. When the need for heating is satisfied, the heater and IFM are de-energized.
Table 2 – Wet Coil Air Delivery*
50ZPM
Unit Size
Speed
Tap
External Static Pressure (in. wg.)
36
48
60
*Air delivery values are based on wet coil, without filter or electric heater. Deduct filter and electric heater pressure
drops to obtain static pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity.
Evaporator coil frosting may occur at airflows below this point.
2. Standard Cubic Feet per Minute.
MAINTENANCE
To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic
maintenance must be performed on this equipment. This cooling unit should be inspected at least once each year by a
qualified service person. To troubleshoot unit, refer to Troubleshooting Chart. NOTE TO EQUIPMENT OWNER:
Consult your local dealer about the availability of a maintenance contract.
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury or death and possible unit component damage.
The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills,
tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment,
other than those procedures recommended in the Owner’s Manual.
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