CTRLMax Manual

6
CHAPTER 2
CHAPTER 2 - CH SETTINGS
Demand Type screen menu
Thermostat & Outdoor Curve – A central heating call from a dry contact
switch will enable the appliance and the setpoint will vary with the outdoor
temperature for central heating calls.
Thermostat & Setpoint - A central heating call from a dry contact switch will
enable the appliance and the setpoint will be xed for central heating calls.
Constant & Outd. Curve - The appliance will maintain setpoint and the central
heating circulators will be constantly enabled without an external call from a
dry contact switch. The central heating circulators will be disabled when the
outdoor temperature exceeds the Warm Weather Shutdown Temperature set-
ting. The setpoint will vary with the outdoor temperature for central heating
calls.
Constant & Setpoint - The appliance will maintain setpoint and the central
heating circulators will be constantly enabled without an external call from a
dry contact switch. The central heating circulators will be disabled when the
outdoor temperature exceeds the Warm Weather Shutdown Temperature set-
ting. The setpoint will be xed for central heating calls.
0 - 10V Modulation Signal - This option allows the appliance ring rate to be
controlled by an external control system with a 0-10 VDC signal. Based on the
control input voltage, the appliance will start to operate for heat demand. The
CH temperature is limited by the Absolute maximum temperature.
• 0 – 2V appliance is o.
• 2 – 10 V linear power increase from minimum to maximum output.
• 10 – 2 V linear power decrease from maximum to minimum output.
• 2 – 1 V appliance on minimum capacity.
• 1 - 0 V appliance o.
CH Settings
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH maximum capacity 100%
CH minimum capacity 0%
Abs. Max. CH Setpoint 186°F
CH1 Max. Setpoint 180°F
Demand Type
Thermostat & Outd. Curve
Thermostat & Setpoint
Constant & Outdoor Curve
Constant & Setpoint
0-10 V Modulation Signal
CH Settings
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH maximum capacity 100%
CH minimum capacity 0%
Abs. Max. CH Setpoint 186°F
CH1 Max. Setpoint 180°F
CH Maximum Capacity
100%
0%
100%
CH Maximum Capacity limits the maximum CH capacity.
The appliance capacity can be dened by adjusting this value,
100% means Maximum CH output, 0% means minimum CH
output. It is therefore possible to adjust the CH capacity to the
installation needs.
Example: when set to 60%, the real appliance capacity is the
appliance minimum capacity plus 60% of the dierence be-
tween the maximum and minimum capacity.
Adjust the CH Maximum Capacity value using the LEFT or
RIGHT keys to then store the setting with the OK key.
Default: 100%
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