Intergas Heating Ltd
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8.4 Setting maximum CH power
The maximum CH power is set to 70% in the factory. When the CH system
requires more or less power, the maximum CH power can be changed by
adjusting the fan speed. See table: Setting CH power.
This table gives the relation between the fan speed and the appliance power.
Setting CH power
Setting on service display
Caution
The power slowly increases while burning (modulation by time) and decreases as
soon as the set supply temperature is reached.
8.5 Setting pump position
1. Adjust the pump setting dependent on the maximum power set and the
water resistance of the installation by setting the parameters 3. (3 dot) and c.
(c dot).
The pump speed will now modulate between the minimum and maximum
value proportional to the fan speed.
2. Check the temperature difference between the appliance supply and return:
this must be approximately 20°C.
Make sure the flow does not undershoot the values mentioned in the table
below.
A. Not applicable
B. Rapid 25
C. Rapid 32
X Flow-through in litres/hr
Y Pressure loss / pump lift in metres head
8.6 Weather-dependent control
When the outside sensor is connected, the supply temperature is automatically
controlled dependent on the outside temperature in accordance with the set
control line.
The T set CH (= CH supply temperature) is set via the temperature display. If
required, the control line can be adjusted by the service code. See § 8.3.
X. T outside °C A Factory setting
Y. T supply °C B Example
Press loss/pump lift (m head)
Flow (litres/hr)
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