16
5:0 SAFETY CHECK
The safety check must be carried out after every service.
Check:
• That the intake/exhaust hoses and ue are tight and
undamaged.
• That the LPG pipes are tight. Pressure test the system.
• That the 230 V~ earth cable is connected.
• That the safety valve on the water heater is not blocked.
• That the heating system is lled with glycol mixture
up to the mark on the expansion vessel.
Fig 28.
A
White
Red
Blue
4:10 REPLACING THE PRESSURE SWITCH
1. Remove the cover and end-plate from the boiler.
2. Detach the blue, white and red cables on the pressure
switch.
3. Push back the metal securing plate and pull out the
pressure switch (g. 28 A).
4. Detach the rubber hoses (g. 28 B) from the pressure
switch (do not pull the hoses, unscrew them).
5. Ret the hoses to the new pressure switch before
pushing it into place.
6. Fasten the pressure switch and t the cables to the at-
pin contacts in accordance with g. 28.
7. Fit the cover and end plate to the boiler. Test-start the
boiler.
B
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