1-18
Pioneer Gold 3.00 Controller Technical Guide
operation, the WSE valve will disable. Following a 60 second
delay, the unit will resume normal compressor heating operation
until the heating input is removed. When this happens, the display
will signify the WSE was unable to meet the heating call.
Dual Operation
The Entering Water Temperature is monitored according to
the demand required (heating or cooling), as described in its
corresponding mode above.
Dehumidication Operation
Enable Setpoint minus the deadband.
will only be available when the Cooling and Heating demands
Fan Speed Dehumidication
to the Cooling sequence of operation, with the exception that
lieu of high/cooling speed (low speed for discrete speed ECMs
If a WSE is present, and the Entering Water Temperature falls
below the Cooling Entering Water Temperature Setpoint (default:
enabled and operate as described in the Waterside Economizer
Operation section.
For Freeze Protection, the Leaving Water Temperature and
Evaporator Coil Temperature will be monitored, and the unit
will be protected according to the selected setpoints.
Hot Gas Reheat Dehumidication
valve “HG” 24 VAC outputs are enabled. If the unit is equipped
with WSE, the Entering Water Temperature Setpoint for WSE
transition is ignored, and freeze protection is still monitored. The
For Freeze Protection, the Leaving Water Temperature and
Evaporator Coil Temperature will be monitored, and the unit
will be protected according to the selected setpoints.
requires cooling or heating, the cooling or heating calls will be
then requires Cooling Mode, the controller will disable reheat
but the Control Temperature Sensor then requires Heating Mode,
the controller will disable reheat and disable the reversing valve,
entering Heating Mode.
If the controller is transitioning from Cooling Mode directly to
priority, the compressors will remain enabled, reheat will be
enabled, and the Supply Fan will stage down.
Additional Feature Sequences
Outdoor Air Damper Operation
CO
2
Control Override
As the CO
2
(Space or Return Sensor) rises above the CO
2
Setpoint
be sent to the outside air damper to modulate open, and a General
Alarm will be displayed. As the CO
2
falls below the CO
2
Setpoint
minus the deadband (20ppm, non-adjustable), the signal to the
outside air damper will be removed.
SEQUENCE OF OPERATION
Space/Room Sensor Control Dehumidication
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