Weishaupt WTC 60-A Operations Instructions download pdf (Page 18)

Unsuitable water results in scaling and

corrosion formation and can cause damage

to the condensing boiler.

4.4 Mains water connection

Hydraulic connection

1 Gas Ø 22 mm

2 Heating flow Ø 28 mm

3 Condensate outlet Ø 32 mm

4 Heating return Ø 28 mm

Application in sealed heating systems

☞ Connect flow and return (pipes should be rinsed

thoroughly before connecting).

☞ Install boiler, inlet and outlet valves

(available as an accessory).

☞ Install safety valve (available as accessories).

☞ Fit expansion tank.

☞ Fit sludge trap in return pipe (if required).

18,2

129

454

160

300

320

4.5 Filling with water

When filling the heating system, the requirements for the

heating system water (see also Ch. 3.5) should be

observed.

ATTENTION

☞ Check pre-pressure of the diaphragm expansion

vessel.

☞ Prior to first commissioning, the heating system

should be flushed with at least twice the amount of

the system content to remove contaminants. Swarf,

rust, scale, sludge etc. can influence the operational

safety.

☞ Open all thermostatic valves in the system.

☞ Loosen cap of quick action vent valve.

☞ Open service cocks for heating flow and return.

☞ Slowly fill heating system from tap connected to the

heating return (minimum system pressure >1.0 bar).

Observe all relevant regulations.

☞ Vent all radiators.

☞ Once the system has been vented, check system

supply pressure, if necessary repeat fill procedure.

☞ Seal joints and screwed unions should be checked to

ensure they are tight.

Note: The unit and any separately fitted pumps

must be switched off during filling.

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Weishaupt WTC 60-A Operations Instructions Page 18

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