andrews R18 Series, Technical Documentation Manual

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18IP22B
34
6 COMMISSIONING
6.1 General COMMISSIONING OF THE WATER HEATER MUST BE
Electrical connection
CARRIED OUT BY PROPERLY QUALIFIED AND AUTHOR-
ISED PERSONNEL. OTHERWISE, THE GUARANTEE WILL
BECOME VOID.
Never deviate from the instructions in this manual.
Flushing the system
To prevent damage from rust, sealing compounds, sand, metal
particles etc., the system must be flushed thoroughly, before
the system is switched on. Also ensure that the heat exchanger
is free of any such deposits after flushing the system.
Water heating system
- fill the system up to the standard set pressure
- bleed the system
- switch on all pumps and check for correct direction of rota-
tion
- close the stop-valves in the secondary groups.
- check the water heater electrical connection
- switch on the water heater with the ON/OFF switch
- adjust the temperature regulator to the desired flow water
temperature.
Gas connection
- open the gas service cocks
- bleed the gas pipe.
NB: Ensure adequate ventilation during bleeding
- connect the measuring equipment to check:
* pre-pressure
* burner pressure
* water heater ionisation