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11.7.2 Engineer Parameter List
Parameter number Description Units Range Default Value
P 00 CH Anti-Cycle time mins 0-10 0
P 01 CH Pump Overrun time secs 0-240 60
P 02 DHW Pump Overrun time secs 0-240 0
P 03 DHW min flowrate l/min/10 15-40 15
P 04 CH Pump Speed % 50-100 100
P 05 DHW Tank Pump Speed % 50-100 100
P 06 DHW Programmer Type N/A 0-1 0
P 07 CH Programmer Type N/A 0-1 0
P 08 DHW Tank setpoint offset °C 0-30 6
P 09 DHW Tank Differential °C 1-10 6
P 10 CH Temp Differential °C 2-10 5
P 11 Low pressure shutdown bar/10 2-10 6
P 12 High pressure shutdown bar/10 24-28 28
Detailed descriptions of the Engineer Parameters can be found below:
Parameter
Description
P00
Used to prevent the burner firing in CH mode for a period after it last
stopped, to prevent inefficient short cycling of the burner CH mode.
P01
Keeps the circulating pump running for a period after the last CH cycle, to
distribute heat within the primary heat exchanger after a CH cycle.
P02
Keeps the circulating pump running for a period after the last DHW cycle,
to distribute heat within the primary heat exchanger after a DHW cycle.
P03
Minimum DHW flow rate for activation of the DHW Instantaneous cycle,
measured in litres/minute/10. For example P03=15, means 1.5
litres/minute.
P04
Circulating pump speed during CH cycle, this can be reduced depending
on system requirements.
P05
Circulating pump speed during DHW Tank cycle, this should be kept at
100% for fastest tank re-heat.
P06
DHW Programmer Type. 0 = External Time Programmer Control
1 = Internal Time Programmer Control
P07
CH Programmer Type. 0 = External Time Programmer Control
1 = Internal Time Programmer Control
P08 Temperature above DHW setpoint the Tank Cycle switches off at.
P09 Temperature differential on DHW Tank cycle.
P10 Temperature differential on CH cycle.
P11
Minimum allowable system water pressure in bar/10. For example P11=6,
means 0.6 bar.
P12
Maximum allowable system water pressure in bar/10. For example
P12=28, means 2.8 bar.
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