53
Operation
Unit operations must be controlled with
thermostat, or unit controller, never at the
main power supply, except for servicing,
emergency, or complete shutdown of the
unit.
Thermostat Operation
Heating
Thermostat system switch - "Heat"
Thermostat fan switch - "Auto" or "On"
Thermostat temperature set to desired point.
Cooling
Thermostat system switch - "Cool"
Thermostat fan switch - "Auto" or "On"
Thermostat temperature set to desired point.
Air Circulation
Thermostat system switch - "Off"
Thermostat fan switch - "Auto" or "On"
No change of the thermostat temperature.
With these settings, the supply blower will
run continuously but the supply air will not
be heated, cooled, or dehumidified.
System Off
Thermostat system switch - "Off"
Thermostat fan switch - "Auto"
No change of the thermostat temperature.
With these settings the system is shut down,
with the exception of control system power.
Night and Weekend Unoccupied Operation
To reduce the operating time of the unit when
the space is unoccupied, such as nights and
weekends, it is recommended that the
temperature setting be raised about 5°F while
unoccupied during the cooling season and
lowered about 10°F during the heating
season.
Packaged DX Cooling Operation and
Control
When a call for cooling (G and Y1, Y2, etc.)
is made the supply blower motors and
compressors will energize.
Note:
When using field controls any variable
capacity compressors must run at 100% for 1
minute when starting.
Gas Heater Operation
When heat (G and W1, W2, etc.) is called for
the combustion motor starts and the ignition
control is energized. The control sends 24
VAC to the main gas valve and high voltage
to the igniter. If a burner flame has been
detected within 10 seconds, the spark is
extinguished and the flame continues. If a
flame has not been detected after 10 seconds,
the gas valve closes, the spark ceases and the
induced draft blower continues to purge the
heat exchanger. After 45 seconds of purge,
the ignition system will attempt to light the
burners again. Should no flame be detected
after 3 tries, the ignition control will lock out
the system. Power to the ignition control
must be cycled to reset the heater control.
COMPRESSOR CYCLING
3 MINUTE MINIMUM OFF TIME
To prevent motor overheating
compressors must cycle off for a
minimum of 3 minutes.
5 MINUTE MINIMUM ON TIME
To maintain the proper oil level
compressors must cycle on for a
minimum of 5 minutes.
The cycle rate must not exceed 7
starts per hour.
WARNING
Summary of Contents for RQ NextGen Series
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Page 26: ...26 Figure 3 RQ Cabinet Standard and Power Exhaust Gasket Locations...
Page 40: ...40 Figure 23 Post Corner Hole Piping Figure 24 Post Back Hole Piping...
Page 88: ...88 Gas Heater Operating Instructions Figure 36 Gas Heater Instructions...
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Page 105: ...105 Maintenance Log E Coated Coil...
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