Intergas Heating Ltd
35
10.4
Setting maximum CH power
The maximum CH power is set at 70% in the factory. If more or less power is
necessary for the CH installation, the maximum CH power can be changed by
changing the fan speed (rpm). See table “Setting CH power”.
This table shows the relationship between the fan speed and the appliance power.
Setting CH power
Desired CH power
(in kW approx.)
Setting on service display
(in % of max. rpm)
24
30
36
17,8
22,8
26,3
85
14,8
19,1
22,6
70
12,7
16,4
19,0
60
10,6
13,7
15,8
50
8,3
11,0
12,7
40
6,4
8,3
8,5
30
5,4
6,9
7,1
25
-
-
-
20
Note
The power during operation is increased slowly and is reduced as soon as the set
supply temperature is reached (modulate on T flow).
10.5
Adjusting pump setting
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.
Plesa
g
The minimum flow quantity (l/h)
Power setting (kW)
155
5,4
500
17,5
650
22,7
750
28,4
910
31.9
Appliance pressure loss graph, CH side
A.
Combi Compact ECO RF 24
B.
Combi Compact ECO RF 30
C.
Combi Compact ECO RF 36
X
Flow in l/h
Y
Pressure loss / water head in mH
2
O
6
7
100 %
75 %
50 %
25 %
Y
X
