Intergas Heating Ltd
33
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
rpm. See table Setting CH power.
This table shows the relationship between the fan rpm and the appliance power.
Setting CH power
Desired CH power
(in kW approx.)
Setting on service display
(in % of
max. rpm)
18 OV
24 OV
30 OV
17,8
22,8
26.3
± 83
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
Note
The power during burning is increased slowly and is reduced as soon as the set
supply temperature is reached (modulate on T flow).
10.5
Adjusting pump setting
If an external pump is used, dependend on the type used the pump setting can be
adjusted. Consult the manual of the external pump for advice.
Check the temperature difference between the appliance supply and return: this
must be approximately 20°C.
The minimum flow quantity
Power setting
155 l/h
5,4 kW
510 l/h
17,8 kW
650 l/h
22,8 kW
750 l/h
26,3 kW
Appliance pressure loss graph, CH side
A.
Compact HRE 18 OV
B.
Compact HRE 24 OV
C.
Compact HRE 30 OV
X
Flow in l/h
Y
Pressure loss / water head in mH
2
O
10.6
Weather– compensation adjustment
When an external sensor is connected the supply temperature is adjusted
automatically depending on the outside temperature, in accordance with the heating
line set.
The maximum supply temperature (Tmax) is set via the temperature display. If
desired, the heating line can be changed in the parameter list. See § 10.3.
Heating line graph
X.
Outside T in °C
Y.
Supply T in °C
A.
Factory setting
(Tmax CH = 80°C, Tmin CH = 25°C, Tmin out = -7°C, Tmax out = 25°C)
B.
Example
(Tmax CH = 60°C, Tmin CH = 25°C, Tmin out = -7°C, Tmax out = 25°C)