iWorx® HPU3
505-035, Effective: June 30, 2015
29
© 2015 Taco Electronic Solutions, Inc.
Compressor Stages
This screen displays HPU3 settings related to this topic and allows access to all of these settings from a single screen.
Auxiliary Heat
This screen displays HPU3 settings related to this topic and allows access to all of these settings from a single screen.
Dehumidification
This screen displays all the dehumidification settings and provides access to edit these parameters from a single
screen.
Humidification
This screen displays all the humidification settings and provides access to edit these parameters from a single screen.
Modulated Fan
This screen displays all the Mod Fan settings and provides access to edit these parameters from a single screen.
Setting
Range
Default
Description
Stages
1 to 2
2
Number of compressor stages.
Control Band
0 to 10.0
°F (0 to 5.56
°C) 1 °F (0.6
°C)
Heating and cooling stage control band.
Stage Time
0 to 255 minutes
5 minutes
Compressor control cycle timer.
Setting
Range
Default
Description
Setpoint
-459 to 621
°F
(-273 to 327
°C)
20.0 °F
(-6.7 °C)
The outside air temperature (OAT) that trig-
gers auxiliary heating.
Temperature Offset
-10 to 10.0
°F
(-5.56 to 5.56
°C)
2.0 °F
(1.1 °C)
The temperatre offset above the setpoint
when auxiliary heating ends.
Setting
Range
Default
Description
Type
Normal Occupied,
Normal Always
Normal Occu-
pied
Available dehumidification types
Setpoint
0.00% to 100.00%
0% (disabled)
Humidity Setpoint
Shutoff Offset
0 to 10°F (0 to 5.56°C)
2.0°F (1.1°C)
Heating Setpoint offset to shut off dehumidifi-
cation
Mode
External,
Internal
External
Internal = use compressor staging (S1, S2)
and dehumidify output (DHUM) to dehumidify.
External = dehumidify output (DHUM) only.
Setting
Range
Default
Description
Type
Occupied
Always Enabled
Occupied
Type of humidification
Space RH Setpoint
0.00% to 100.00%
0% (disabled)
Humidity Setpoint
Supply RH Limit
0.00% to 100.00%
80%
Maximum allowed SAH
Purge Time
0 to 65535 seconds
120 seconds
Purge time before and after humidification
Setting
Range
Default
Description
Kp
0.0% to 100.0%
5.0%
Proportional band control constant
