Atmos Energy HE26 - Manual (Page 38)

7.4 Setting maximum CH power
The maximum CH power is set to 50% 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
Press loss/pump lift (m head)
Flow (litres/hr)
Required CH power Setting on service display
InterSystem HE26
(approx kW) (% of the maximum speed)
26.2 83
23.5 75
21.9 70
20.4 65
18.9 60
17.4 55
15.8 50
14.2 45
12.7 40
11.1 35
9.5 30
8.0 25
Caution
The power slowly increases while burning (modulation by time) and
decreases as soon as the set supply temperature is reached.
7.5 Setting pump position
The switch for setting the pump position is located on the connecting box
of the CH pump
1. Set the pump position on the basis of the set maximum power and
the resistance of the system on the water side. See diagram:
Pressure loss and pump lift, type Ups 50-130, positions 1, 2 and 3.
2. Check the temperature difference between the supply and return of
the appliance: this should be about 20°C.
The minimum flow-through Set power
200 l/h 7.0 kW
750 l/h 26.2 kW
A. (Not
applicable)
B. InterSystem HE26
I Pump position 1
II Pump position 2
III Pump position 3
X Flow-through in litres/hr
Y Pressure loss / pump lift in metres head
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