210.100-IOM (JUL 2018)
Page 38
ACUAIR
®
HYGIENIC AIR UNITS
OPERATION
Examine your environment. If structure, equipment, or other
elements of your facility show rust or corrosive effects, the
evaporator coils are not likely to be impervious to the same
effects of the environment. Consider this when formulating
your maintenance program.
GAS HEAT START-UP
1. Close the manual gas shutoff valve external to the burner.
2. Turn off the electrical power to the furnace.
3. Set the temperature to the lowest possible setting.
4. Set the burner controls to the OFF position.
5. Wait five minutes to clear out any gas. Then smell for gas,
including near the floor.
6. Set the burner controls to the ON position.
7. Close the door on the front of the gas manifold.
8. Open the manual gas valve external to the furnace.
9. Turn on the electrical power supply to the furnace.
10. Set the controls to the desired temperature.
NOTICE
This heater is equipped with an ignition device which
automatically lights the burner. Do not try to light the
burner by hand.
NOTICE
There is an approximate 30 second delay between
controls energizing and burner firing.
Figure 45 - AcuAir Direct Fired Gas Burner
GAS HEAT SHUTDOWN
1. Set the controls to lowest setting.
2. Turn off the electrical power supply to the furnace.
3. Set the burner controls to the OFF position.
4. Close the manual gas shutoff valve external to the furnace.
Figure 46 - AcuAir Gas Burner Wrapper
24-Hour Run-In
After 24 hours of operation under load, the following services
should be performed:
1. Examine the unit for any unusual noise or vibration.
2. Readjust fan belt tension if required.
START-UP AFTER PROLONGED SHUTDOWN
It is imperative that maintenance personnel conduct a
thorough start-up before running the unit after a prolonged
shutdown.
At minimum, the following checks must be preformed:
1. Clean any debris from guards, fans, eliminators, heat
transfer coils, and filters.
2. Turn the fan(s) by hand to ensure rotation without
obstruction.
3. Verify and, if necessary, adjust the fan belt tension. (See
Belt Replacement and Tensioning
section)
4. Prior to start-up, lubricate the fan shaft and motor
bearings. The ball bearings are factory lubricated, but should
be relubricated if the unit has been sitting on site for more
than a year before start-up.
5. Check the locking collar on each fan shaft bearing and
tighten if necessary.
6. Verify the voltage and current of all three legs of the fan
motors. The current should not exceed the rated service factor.
After prolonged shutdowns, the motor insulation should be
checked with a Megger Tester prior to restarting the motors.
7. Start the fan(s) and verify proper rotation as indicated by
sticker on unit.
Summary of Contents for AcuAir
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