Controller pack
Service Manual
106
Parameter tables
SMGB0066 rev.0 - 12/2009
Id
Parameter
Conf
description
Min
Max
Step
default
P27
Maximum allowed
DHW loading time
(not available if P1=0)
123-5
Sets the maximum time allowed for DHW
loading. After this time, if the DHW setpoint is not
achieved, the controller will nevertheless return to
heating.
1
12
0.5
1.5 hr
P30 No-load function enable 12345
Disables the heating in Zone 1 if the OTC
calculated supply setpoint falls below the room
temperature
0
1
1
1
P31 Heat Pump Sensor
Offset
12345
Compensates for differences in temperature
measurement between the Heat Pump and the
Supply Sensor.
0
5
1
3°C
P32 Supply-Return
Difference Control Limit -2345
Control parameter to help maximise running time
of the heat pump and minimise use of the electric
heater or boiler.
1, then
OFF
10
1
3°C
P33 Return Temperature
Limit Offset
-2345
Control parameter to prevent electric heater use
when the return temperature is too high for heat
pump operation.
1, then
OFF
15
1
OFF
P34
DHW Electric Heater
Waiting Time (not
available if P1=0)
12---
Sets the time to wait after starting to heat the
DHW tank before enabling the special output for
“DHW electric heater enable”
0
60
1
45min
P35 Mixing Valve Opening
Delay Time
---45
For solid fuel or oil fired boilers. Prevents the
mixing valve opening for the set delay time to
allow the boiler to heat up (minutes).
1, then
OFF
20
1
OFF
EP37
DHW offset for Heat
Pump maximum supply
temperature.
12345
The maximum DHW temperature able to be
supplied by the heat pump is the Heat Pump
maximum supply temperature minus this EP37
value
0
20
1
7 K
Conf: only parameters that are allowed in a particular configuration are shown on the display..
4.10.1. Engineering Parameters
function
•
Engineering Parameters (EP) are provided for service engineers or the manufacturer to make adjustments that may be
required to fix difficult or unusual problems. They are accessed in a similar way to the installer parameters via the front
panel keypad.
Setting Instructions
•
To enter Engineering Parameter Display mode from the Normal Operation mode, press the
SET
,
SEl
and buttons
together for at least one second. The display will show “EP1” (or “EP2” or “EP5” depending on the system configuration)
to indicate that the System Controller is in Engineering Parameter Display mode, and shows the parameter abbreviation
and its current setting.
Use the
1.
+
and
-
buttons to move up or down the parameter list according to the table.
To change a parameter setting, use the
2.
SET
button to enter Parameter Setting Mode. The value of the parameter will
flash to show that it can now be changed. Use the
+
and
-
buttons to change the value to the desired setting.
To store the parameter setting, press the
3.
SET
button. The flashing will stop to show the value has been saved. Instead,
to cancel the change, and retain the previously stored value, press the
SEl
button.
Continue to change the parameters as required. When finished, or at any time, pressing the
4.
button will return the
display to Normal Operation mode.
