9 Appliances
146
B-MC - 12/18-2 - EHG-0016-01EN
The boiler is equipped with a safety/drainage valve (Fig. 154). The
safety/drainage valve prevents water in the boiler from freezing, when there
is frost and the heater is not switched on.
When the vehicle is not used for a long period of time, open the
safety/drainage valve and empty the boiler.
At temperatures below 3 °C the safety/drainage valve opens automati-
cally. Only if the temperature of the safety/drainage valve lies above
7 °C can it be shut again.
The water pump and the water fittings are not protected against freezing
by the safety-/drainage valve.
The drainage neck of the safety/drainage valve has to be free of dirt
(e.g. leaves, ice) at all times.
Fig. 154 Safety/drainage valve (boi-
ler)
Fig. 155 Drain cock (water pipe)
Position of the safety/drainage valve, see section 10.6.
The boiler can be supplied with water from the water tank.
Switch on the 12 V power supply on the panel.
Close the safety/drainage valve. Turn the knob (Fig. 154,1) perpendicu-
lar to the safety/drainage valve and push the push button (Fig. 154,2) in.
Set all the water taps to "Hot" and open them. The water pump is turned
on. The warm water pipes are filled with water.
Keep the water taps open until the water flowing out of the water taps
has no bubbles in it. This is the only way to ensure that the boiler is full
of water.
Close all water taps.
Switch off production of hot water.
Open the safety/drainage valve. To do this turn the knob (Fig. 154,1)
parallel to the safety/drainage valve. The push button (Fig. 154,2) jumps
out. The boiler is drained to the outside by the safety/drainage valve.
Check whether the water has been drained completely from the boiler
(approx. 10 litres).
Close the drain cocks. In order to do this, turn the cap of the drain cock
(Fig. 155) in a clockwise direction.
Safety/drainage valve
Position
Filling/emptying the boiler
Filling the boiler with water:
Emptying the boiler:
Summary of Contents for BMC 550
Page 2: ...Instruction manual 2 B MC 12 18 2 EHG 0016 01EN...
Page 8: ...Checklist before first journey of the vehicle 8 B MC 12 18 2 EHG 0016 01EN...
Page 12: ...1 Introduction 12 B MC 12 18 2 EHG 0016 01EN...
Page 20: ...2 Safety 20 B MC 12 18 2 EHG 0016 01EN...
Page 54: ...4 During the journey 54 B MC 12 18 2 EHG 0016 01EN...
Page 140: ...8 Electrical system 140 B MC 12 18 2 EHG 0016 01EN...
Page 172: ...9 Appliances 172 B MC 12 18 2 EHG 0016 01EN...
Page 186: ...10 Sanitary fittings 186 B MC 12 18 2 EHG 0016 01EN...
Page 202: ...11 Care 202 B MC 12 18 2 EHG 0016 01EN...
Page 224: ...13 Wheels and tyres 224 B MC 12 18 2 EHG 0016 01EN...
Page 240: ...16 Technical data 240 B MC 12 18 2 EHG 0016 01EN...
Page 242: ...17 Instructions for the service partner 242 B MC 12 18 2 EHG 0016 01EN...