Lochinvar CP-M Series, Installation, Commissioning & Maintenance Instructions

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12.10 OUTSIDE TEMPERATURE COMPENSATION
12.10.1 MAIN PARAMETERS FOR SETTING THE COMPENSATED HEATING CURVE
FIGURE 12.13 COMPENSATED HEATING CURVE – MAIN SETTINGS
When using this function the flow temperature is calculated based on the measured outdoor temperature. The
relation between the outdoor temperature and the flow temperature can be programmed with the following
parameters. This setting creates the so called “heating curve”.
P5 AA Outside present Config (1=on 0=off) *
To enable outside temperature compensation, this parameter must be set to a value of 1 and an outside
temperature sensor must be connected to the boiler. When a cascade of CP-M+ boilers is used, these changes
should be made to the master boiler only.
P5 AC Heat curve minimum outside temperature °C
This sets the minimum outside temperature at which the maximum flow temperature that is set.
P5 AD Heat curve flow temperature at minimum °C
This sets the desired maximum flow temperature at the set minimum outside temperature.
P5 AE Heat curve maximum outside temperature °C
This sets the maximum outside temperature at which the minimum flow temperature that is set.
P5 AF Heat curve flow temperature at maximum °C
This sets the desired minimum flow temperature at the set maximum outside temperature.
P6 BC Heat curve Parallel Shift °C
This parameter defines actual parallel shift that is set by the user. The bandwidth of the shift allowed is limited by
the control software.
OUTSIDE TEMPERATURE
FL
O
W T
EM
PE
R
AT
U
R
E
40 30 20 10 -40 -30 -20 0 -10
30
0
90
80
70
60
50
40
20
10
P5 AE
outside temp high
P5 AC
outside temp low
P5 AF - Flow temp at
outside temp high
P5 AD - Flow temp at outside temp low
P6 BC - Parallel shift
HEATING CURVE
- main settings