HAMWORTHY HEATING LTD
43
MILBORNE
500001130/J
8.10.3 Setting high temperature heating circuit functions for constant temperature
Parameter Description
Setting
procedure
End user adjustable parameters
P.1
High temperature circuit set-
point
Set to required operating temperature.
Limited by setting at parameters 17 & 18.
Heating engineer adjustable parameters – code protected
P.14
High temperature circuit type
Set to 0 for constant flow temperature
P.16
Heating circuit priority
Set to 0 for shared priority
Set to 1 for high circuit priority
Set to 2 for low circuit priority
P.17
High temperature circuit
upper limit
Limits the end users set-point adjustment available at parameter
1. Max 80°C
P.18
High temperature circuit
lower limit
Limits the end users set-point adjustment available at parameter
1. Min 10°C
P.19
High temperature circuit
hysteresis on
Sets the temperature at which the burner will re-start after
reaching set-point at parameter 1.
Eg. For 80°C set-point. Setting to 7 will start the burner at 73°C
P.20
High temperature circuit
hysteresis off
Sets the temperature at which the burner will stop after reaching
set-point at parameter 1.
Eg. For 80°C set-point. Setting to 1 will stop the burner at 81°C
Circuit priority Parameter P.16 -
Prioritising one heating circuit over the other, allows the boiler management
system to provide that circuit with maximum available power at all times there is a heating demand.
The priority method may reduce the power available to other circuits if there is a high demand in the prioritised
circuit and the boiler sizing is lean.
If all circuits are required to operate without interruption the priority should be set to shared, ie setting ‘0’.
8.10.4 Setting low temperature heating circuit functions for constant temperature
End user adjustable parameters
P.3
Low temperature circuit set-
point
Set to required operating temperature.
Limited by setting at parameters 23 & 24
Heating engineer adjustable parameters – code protected
P.22
Low temperature circuit type
Set to 0 for constant flow temperature
P.23
Low temperature circuit upper
limit
Limits the end users set-point adjustment available at parameter
3. Max 70°C
P.24
Low temperature circuit lower
limit
Limits the end users set-point adjustment available at parameter
3. Min 10°C
P.26
Low temperature circuit
hysteresis on
Sets the temperature at which the burner will re-start after
reaching set-point at parameter 3.
Eg. For 50°C set-point. Setting to 7 will re-start the burner at 43°C
P.27
High temperature circuit
hysteresis off
Sets the temperature at which the burner will stop after reaching
set-point at parameter 3.
Eg. For 50°C set-point. Setting to 1 will stop the burner at 51°C
P.28
Mixing valve opening period
Set time taken for mixing valve to open from fully closed position.
Eg 5 secs.
Max 255 secs
P.29
Mixing valve closing period
Set time taken for mixing valve to close from fully open position.
Eg 7 sec.
Max 255 secs
P.30
Mixing valve static period
Set time mixing valve is to remain static after moving. Eg 5 secs.
Max 255 secs
