Arzel Heat PumPro - Cooling LAT Low Limit; Type of Back-up Heat; Dehum Caller Voltage; Secondary Purge Time

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Cooling LAT Low Limit Cooling leaving air temp low limi
t
Set the minimum supply air temperature in the cooling
cycle to prevent the coil from freezing.
34-46 degrees F,
1 degree F steps
42 degrees F
Type of back-up Specify type of Aux “Back-Up” heat
Select the type of heat that will be initiated when the heat
pump can no longer maintain the setting of the heat stage
threshold.
Electric or Fossil
Fuel
Fossil Fuel
Back-up controls fan
G output for fossil fuel heat operation True=”W” False=”W”, “G”
Select true if the back-up heat source controls the fan
internally or false if the Heat PumPro needs to initiate the
fan.
True or False True
Dehum Caller
Voltage
Required voltage to energize a dehumidification call. (Note:
Leave setting at 24v when not used.)
Set to the dehumidifcation control voltage out put on the
dehumidistat control, Y
0 Volt or 24 Volt 24 Volt
Secondary Purge Time End-of-cycle purge time to diffuse residual heating or cooling
Set the amount of time in seconds to run the pump after a
cycle to open all the dampers. Typically 5 seconds per
damper.
0-180 seconds, 10
sec increments
60 seconds
Dehumid Cycle Time Dehumidification “On Cycle” time limit to prevent over-cooling of
space once cooling set-points are reached (off cycle is fixed at
10 min)
Set the maximum “ON” time for the dehumidification cycle to
prevent over cooling of the space. The “OFF” cycle is set at
a fixed time of 10 minutes.
5-15 minutes, 5
minute increments
10 mintues
CLG Low Ambient
Lock
Minimum OAT that mechanical cooling is allowed to operate (locks
out Y output)
Set the outdoor temperature at which the cooling will no
longer come on.
20-60, 1 degree F
increments
50 degrees F
Rev Valve Energized
Heat pump rev valve energize in heating or cooling (Zone 1 HP
stat always callls “O” for clg call”)
Set the mode in which the reversing valve is energized.
Note: If the heat pump thermostat has a setting for
reversing valve in the configuration mode, set the
thermostat to energize the reversing valve in cooling.
Cooling or Heating Cooling
Use Bal Pt for Elec
Allow Balance Point to be used on all electric system. True heat
pump will shut down when ODT is below Balance Point setting.
True or False False
Demo Mode Enabled Demo mode speeds up all timing sequences by a factor of 12.
Used for demonstrations and for initial system commissioning.
True or False False
Parameter Description Options Factory
Default