ALUTHERM
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Boilers 27
ALUTERM A 170 - 300
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Installation, user and service manual
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instructions for user
Heating
Alutherm A 170 - 300
6.3
Water connection
6.3.1 Pump
The boiler does not have a built in CH-pump. Therefore, a CH-pump must be mounted separately . Select a pump that matches the hydraulic
resistance of the boiler and the installation.
The graph shows the resistance characteristics for the different boiler models.
For electrical connections see chapter 6.6.
6.3.2
Minimum flow
The minimum flows as indicated in the table beneath must be guaranteed.
Minimum flow
Type
Flow [m3/h] @ delta T 25 full load
Flow [m3/h] @ delta T 30 Start=20%
Flow [m3/h] @ delta T 30 part load
A 170
5,8
1,73
0,96
A 210
7,2
2,16
1,20
A 260
8,7
2,60
1,45
A 300
10,0
3,03
1,69
We recommend to keep the minimum flow at least above 50% of the nominal flow in all cases. When the actual flow is lower than nominal adjust
the hysteresis to prevent hunting.
Hydraulic pressure drop Alutherm series A 170 - A 210 - A 260 - A 300
A 170
A 210
A 260
A 300
