Installation Manual 5.1.2
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can be sped up or slowed down 300 CFM to achieve this
setting.
11.1.6 Calculated Degree per hour
This setting limits the rate the effective set points will
change if a set point change is made from the
thermostat. This is a critical setting to keep the
compressor from ramping up unnecessarily to high
speed when someone adjusts the thermostat set point
or the unit comes out of setback. The default value of 5
will allow the effective set points to change 5 degrees
per hour.
11.1.7 DHW Speeds
If the system is equipped with the optional Priority On-
Demand hot water generation system these two
settings set the two speeds the compressor will run to
make hot water if there is no call for heating or cooling.
The factory default setting of 50 and 100 mean that
when the tank temperature drops below the Priority
start temp the compressor will start at 50%. If the tank
temperature continues to drop the compressor will
ramp up to 100%. In a lot of cases these can be
adjusted to 40 and 75 to be more efficient. This is
useful for instances where the tank temperature has
fallen and only needs to top off the temperature of the
tank. The high speed is used when hot water is being
consumed and a faster recovery rate is required.
11.1.8 DHW Water Temperature Sampling.
This setting when turned on will force another setting
to appear in the installer setting screen labeled “Sample
every _____ sec / run for ___ sec” This setting allows a
DHW water temperature sampling to take place, for
example every 15 minutes turn on the DHW pump for 2
minutes then if the DHW temp is below the set point
turn on the system in Priority. This should only be used
if mounting the DHW tank sensor on the DHW water
line entering the system. It’s always best NOT to use
this function and mount the sensor directly on the DHW
tank.
11.1.9 AHW Speeds
If the system is equipped with the optional AHW
heating generation system these two settings set the
two speeds at which the compressor will run to heat
hot water. A DHW call will take priority over AHW. If
there is an AHW and a forced air heating call the
compressor will ramp up to the AHW stg 2 setting.
11.1.10 AHW Desuperheat in Heat & Desuperheat in
Cool.
When “ON” these settings will allow the system to
“Desuperheat” into the AHW when the system is
running in heating or cooling. These settings are
normally always off.
11.1.11 Thermostat Lock code
The Protostar touch thermostat can be locked so no
adjustment can be made. This setting sets the unlock
code needed to unlock the thermostat. This feature is
explained in more detail in the previous section under
the Protostar thermostat navigation instructions.
11.1.12 Aux heat # of zones to open
Any time an Aux heat call is initiated the system will
calculate the blower speed by adding together the
maximum air flow each zone calling for heat can handle
by using the zone limit percentage. The Aux heat #
setting allows for setting the number of zones to open if
Auxiliary heat is needed from any zone. This may be
needed to force open bigger zones if small zones call for
aux heat. A setting of 0 will only open the damper of
the zone calling for aux heat and all other zones that are
satisfied will be closed. A setting of 1 will open the zone
calling and open zone 1, whether it’s calling or not. A
setting of 2 will open the zone calling, zone 1, and zone
2. A setting of 3 will open zones 1 through 3 and a
setting of 4 will open all dampers if any zone calls for
aux heat. The factory setting for this parameter is 2 in
order to insure the strip heater gets plenty of air flow.
This setting has no effect on the dampers during an E-
heat call. When there is an E-heat call all dampers are
opened and the blower runs a the maximum speed
designed for the system.
11.1.13 Add Zone Output (Default 0ff)
This setting should always be “off” for best
performance. This setting decides how the controller
will react when two or more zones call for the same
mode. Each zone individually calculates a required
compressor percentage needed to maintain the set
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