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Pioneer Gold 3.00 Controller Technical Guide
Reversing Valve Operation
For a single stage compressor, the Reversing Valve will enable
if the controller calls for compressor cooling and the compressor
valve in changing positions. Once the mode of operation has been
the Reversing Valve will stay in the last mode until the mode
changes and (one second later) the compressor will be disabled.
valve will change positions, and following an additional three
seconds, the compressor will stage down to “Y1” operation.
The default Reversing Valve position is for Heating operation.
NOTE: The Pioneer Gold energizes its reversing valve
for cooling. If the Pioneer Gold is used in a unit
where the reversing valve energizes for heating,
you will need to install a normally closed pilot
relay to control the reversing valve.
Electric Heat Operation
External Duct Heaters
The W1 Heat Output is designed to be used with duct heaters.
The duct heaters will provide any staging, delays, and safety
protections required.
additional heat staging output will not be used for external duct
heat.
W1 heat output will be used as a supplemental stage of heating
to the compressors. It will be the last stage of heating enabled
Supply Air Temperature Setpoint. Auxiliary Heat is enabled
when the Supply Air Temperature is below the active Supply
and the PID staging and interstage delays have been met.
Additionally, if the compressor is locked out, the Electric Duct
Heat will be used in an attempt to maintain the active Supply
Air Temperature Heat Setpoint.
W1 heat output will be enabled when compressor heating is
locked out and there is a demand for heating. Emergency heat
will not operate in addition to compressor heating. There is no
supply air control.
Waterside Economizer Operation
On/Off Waterside Economizer (WSE)
Coil Operation
In this operation, the Waterside Economizer (WSE) can be
• O: Default. No condenser water loop function.
• Cool Only: WSE Valve cycles on based on Cooling
Entering Water Temperature Setpoints.
• Heat Only: WSE Valve cycles on based on Heating
Entering Water Temperature Setpoints.
• Dual: WSE Valve cycles on based on Entering Water
Temperature Setpoints of corresponding mode demand.
Cool Only Operation
Entering Water Temperature drops below the Cooling Entering
call for the compressor, if enabled, will be removed once the
will be enabled, sending the cold loop water through the air coil to
utilize “free cooling”. Once the Entering Water Temperature rises
above the Cooling Entering Water Temperature Setpoint plus the
compressor cooling will be utilized following a 60 second delay.
operation, the WSE valve will disable. Following a 60 second
delay, the unit will resume normal compressor cooling operation
until the cooling input is removed. When this happens, the display
will signify the WSE was unable to meet the cooling call.
For Freeze Protection, the Entering Water Temperature will be
monitored.
Heat Only Operation
Entering Water Temperature rises above the Heating Entering
if the compressor is enabled, the call for the compressor will
the WSE 24 VAC output will be enabled, sending the hot loop
water through the air coil to utilize “free heating”. Once the
Entering Water Temperature falls below the Heating Entering
adjustable), the WSE will be disabled, and compressor heating
will be utilized following a 60 second delay.
NOTE: The max allowable Entering Water Temperature
as listed in the WH/WV operating limits is 90°F
when the unit is in Heating Mode.
SEQUENCE OF OPERATION
Space/Room Sensor Controller Electric Heat and WSE
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