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7
M a i n t e n a n c e / s e r v i c e
The manufacturer recommends that annual maintenance be carried out by authorized spe-
cialist personnel.
Steps to Perform a maintenance:
Steps
1. Control of the pump
2. Activation of all ball valves
3. Control of the system pressure
4. Check water quality according to SWKI /
SIA
7.1
Pump replacement
The pump can be completely shut off, it can be changed without the water of the heating
circuit having to be completely drained.
Art.-Nr. 968.20.27.00
Last updated 2022/02/28
activities
adjust if necessary, hydraulic balance
adjust system pressure if necessary
Shut off the ball valves in the
supply and return lines.
Separate the expansion ves-
sel from the system and de-
pressurise it.
Pull the servo motor off the
mixer.
Turn the rotary valve of the
mixer so that the marking
point points upwards.
Position 12 o'clock.
The mixer is now sealed drip-
tight. Change the pump. Turn
the rotary valve 180 ° back to
the operating position, open
the marking point at the bot-
tom and the ball valves in the
flow and return lines.
Fill and bleed the heating
system to the required oper-
ating pressure.
- 15 -
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