Pioneer Gold 1.10 & 2.05 Controller Technical Guide
INPUTS & OUTPUTS
1-21
Controller Input and Output Descriptions
MWV - Hot Water Valve (Future)
HWT - Entering Hot Water Temperature
This input is a 10kΩ Type 3 Thermistor input. It monitors the
temperature of water entering the Hot Water Heat Coil. It is currently
for monitoring only and not used for control.
WSE - Waterside Economizer Valve
This 24VAC relay output signal is used to energize the Water Side
Economizer valve during Water Side Economizer operation.
EWT - Entering Water Temperature
This input is a 10kΩ Type 3 Thermistor input. It is the temperature
of water entering the unit. The only time it is used for control is
to determine if the water temperature is sufficient for Water Side
Economizer (WSE). If you do not have WSE configured, this input
is for status only.
FAN 2 - Supply Fan High Speed
This 24VAC relay output signal is used to engage the Fan to run at
high speed.
RV - Reversing Valve
This 24VAC relay output signal is used to energize the Reversing
Valve (to cooling position).
FAN - Supply Fan Low Speed
This 24VAC relay output signal is used to engage the Fan to run at
low speed.
Y1 - Compressor Stage 1
This 24VAC relay output signal is used to energize the Compressor
contactor (i.e. step 1 of 2-step compressor).
SFS - Supply Fan Speed Analog
This 0-10VDC output signal is used to provide the speed command
for an electronically commutated motor (ECM). The VDC level
outputted corresponds with the Supply Fan Minimum Percentage
Setpoint value when the Supply Fan Low Speed command is active,
and increases to the Supply Fan Maximum Percentage Setpoint value
when the Supply Fan High Speed command is active.
Y2 - Compressor Stage 2
This 24VAC relay output signal is used to energize the solenoid for
the 2nd step of the Compressor for full capacity.
Y3 - Compressor Stage 3 (Future)
PUMP - Variable Speed Pump (Future)
HGR - Hot Gas Reheat Valve
This 24VAC relay output signal is used to energize the HGRH valve
during Dehumidification.
MV - Motorized Water Valve/Pump
This 24VAC relay output signal is used to energize the Water Valve/
Pump during normal Compressor operation, unless the “Full Reheat”
during Dehumidification option is enabled. Please use the H8 Har
-
ness to wire-in an open/closed 24 VAC Water Valve.
HPS - High Pressure Switch
This input is used to monitor the High Pressure Switch. If the
Compressor is running and the signal is removed from this input,
a High Pressure Switch Alarm will be generated. It will also
immediately disable the Compressors and the Fan will remain
running. The Compressor will not be allowed to start if this input
signal is missing. This input is a 24VAC wet input.
LPS - Low Pressure Switch
This input is used to monitor the Low Pressure Switch. If the
Compressor is running and the signal is removed from the input for
more than 10 seconds, a Low Pressure Switch Alarm is generated. It
will also disable the Compressors and the Fan will remain running.
If this alarm is generated 2 times within 2 hours, the unit will “hard”
lockout and require a power cycle to continue operation.
COF - Condensate Overflow 1
This is a factory wired Condensate Overflow Alarm input. An alarm
will be generated any time the resistance between this input and
ground is less than 100K Ohm. This Alarm disables the Compressor
outputs as well as the Main Fan. This is a dry input (contact closure
to COM).
LLT - Liquid Line Temperature
This is a 10kΩ Type 3 Thermistor input. It is the temperature of the
refrigerant liquid line. If the liquid line temperature drops below a
dangerous level, the Low Leaving Water Temperature Alarm will be
generated and the compressors will be disabled. When the liquid line
temperature rises above the safe limit again, this alarm will be reset.
The temperatures for triggering and clearing this alarm are based on
the glycol % programmed into the board. See
Table 10
,
page 36
.
ECT - Evaporator Coil Temperature
This is a 10kΩ Type 3 Thermistor input. It is the temperature of the
Suction Line. If the Suction line Temperature drops below 30 degrees,
a Low Evaporator Coil Temperature Alarm will be generated. The
Compressors will be disabled and the Fan will remain energized.
The alarm will clear when the Suction Line Temperature rises above
45 degrees.
WFS - Flow Switch (Future)
