Heat Controller Water Source Heat Pump - Manual (Page 76)

Section 3 WattMaster WHP
3-28 Programming
Setpoint Screen #3
Setpoint Screen #4
Setpoint Screen #5
If the controlling water temperature drops below this Setpoint,
the Heat Addition or Boilers begin to stage on. As the
temperature continues to drop below the Setpoint by the
Deadband amount, an additional stage is added. Each
additional stage can only activate if the temperature drops
below the Setpoint by the number of active stages times the
deadband value.
Example: There are 2 stages on, a 3 ° deadband and the setpoint
is 79 °
79 ° - 2 x 3 ° = 73 ° before stage 3 can activate
WHP Loop Setpoints
HEATING ADDITION
Setpoint......: xx
°
F
Stage Deadband: xx
°
F
Minimum Default Maximum
Setpoint 50 ° F 76 ° F 99 ° F
Stage Deadband 1 ° F 3 ° F 10 ° F
The Staging Delay period must also be satisfied before an
additional boiler or heat addition stage can be activated.
The maximum number of heat addition stages are programmed
on this screen also. WHP Loop Setpoints
HEATING ADDITION
Stage Delay...: x M
Minimum Default Maximum
Stage Delay 1 Minute 1 Minute 60 Minutes
If the outdoor air temperature drops below this setpoint, the
pump will be energized to prevent the water lines from
freezing. WHP Loop Setpoints
OA FREEZE PROTECTION
Setpoint.....: xx ° F
Minimum Default Maximum
Setpoint -50
°
F 40
°
F 50
°
F