Check Cooling Operation - Aprilaire 8570 Safety & Installation Instructions

9. CHECK COOLING OPERATION

Notes:
• To avoid the minimum on and off times during system
checkout, always start and end the check out
procedure in the OFF mode.
• Do not operate air conditioning at low outdoor
temperatures. Refer to equipment manufacturer
recommendations for safe operating temperatures.
1. Set the thermostat to the OFF mode.
Single/Multi
HP/HC
Configuration Settings
Elect/Gas
Aux. Ht. Stages
1st Stage Cool
Outputs Energized
2nd Stage Cool
2. Set the thermostat to the COOL mode.
• With the O/B configuration setting in the O position (OFF),
the O/B terminal will be on in the Cool mode. In the
B position (ON), the O/B terminal will not be on in the
Cool mode.
3. Lower the temperature setting below the room temperature to
activate the desired stages of cooling. The mode display will
change from "COOL MODE" to "COOLING", which will flash,
when the thermostat is calling for cooling. Fifteen (15) seconds
must elapse between each stage. Verify the correct outputs
are on according to the configuration settings shown below:
Single Multi
The same outputs come on
regardless of how these are set.
Y1, G Y1, G
Y1, Y2, G
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TROUBLESHOOTING – COOLING OPERATION
Symptom Cause
Minimum-off times. Change the mode to OFF first, then change the mode
Thermostat does not call for cooling
to COOL and make a call for cooling.
RC terminal not connected – see wiring diagrams.
Cooling does not come on at all
Cooling equipment power not on.
O/B dip switch not set properly. See Step 2, page 32.
Heat comes on instead of cooling
Miswiring – check wire colors at thermostat and HVAC equipment.
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