7.3 Parameters
Parameter Setting Factory
setting
Description
InterSystem
HE 26
0 Service code [15] - Access to installer settings. The service code must be entered
(=15).
1 System type 1 0 = standard
1 = heating only operation + indirect hot water tank
(Note: Factory setting is 1. Do not change this setting)
2 = n/a
3 = n/a
2 CH pump continuous 0 0 = pump normal with overrun
1 = pump on continuously; 2 = n/a
3 Set CH power 50 Setting maximum CH load, range c – 99% (or 100 if button
pressed again when 99 reached)
4 Set max power 50 Setting maximum power (can be increased to 99)
5 Min. supply temperature of
the control line
25 Setting range 10°C to 25°C (Weather-dependent control)
6 Min. outside temperature of
the control line
-7 Setting range -9°C to 10°C (Weather-dependent control)
7 Max. outside temperature of
the control line
25 Setting range 10°C to 30°C (Weather-dependent control)
8 CH pump overrun time after
CH operation
1 Setting range 0 - 15 minutes
9 CH pump overrun time after
external HW tank operation
2 Setting range 0 - 15 minutes (n/a)
A Position of three-way or two-
way valve
0 0 = output signal given for CH operation (n/a)
1 = output signal given for HW tank operation (n/a)
b (n/a)
C Step modulation 1 0 = step modulation off during CH operation
1 = step modulation on during CH operation
c Min speed in CH operation 25 Setting range 25 to 50% of fan speed (Note: For propane or
for appliances with flue non-return valve, set 40)
d (n/a)
E Min. supply temperature
during OT demand
10 Setting range 10°C to 60°C. (OT = OpenTherm stat)
E. OT response 0 0 = Ignore the OT demand if it is lower than parameter E
1 = Set the value at parameter E, if the OT demand is lower
2 = OT device is switched off and the room stat functions as
an on/off switch, with the supply temp set at the appliance.
F Starting speed CH 70 Setting range 50 to 99% (Note: For propane, set 50).
This parameter sets the fan speed for ignition and post purge.
F. Starting speed DHW
(not applicable to
InterSystem)
70 Setting range 50 to 99% (Note: For propane, set 50).
This parameter sets the fan speed for ignition and post purge
h Max. fan speed 45 Setting range 40 to 50 (40 = 4000 rpm, 50 = 5000 rpm) The
absolute maximum speed can be set through this parameter.
n (n/a)
o Heating delay after hw use 0 (n/a) (0 to 15 mins).
P Minimum switch off time
during CH operation
5 Setting range 0 to 15 minutes (anti cycling function)
37
