CRAWLER TRC 458, User Manual, Page: 61 / 77

- Open the hot water taps in the kitchen and bathroom (set the water regulator
or the single lever faucet to the “hot” position). Keep the faucets open until the
air in the boiler is completely emptied and the water flows uninterruptedly.
Even if only the cold water installation will be operated without a boiler, the
boiler will be filled with water. Even if the boiler is not to be used, it must be
emptied via the safety / drain valve to prevent damage due to freezing.
In case of frost, the filling process may not take place because the water is
frozen. The boiler can be defrosted by short-term operation (max. 2 minutes).
Frozen pipes can be thawed by heating the interior.
When connecting to a central water supply (country or city connection), a pressu-
re reducer must be used to prevent pressure above 2.8 bar in the boiler.
2.12 Draining the boiler
Caution: If the motorhome / caravan will not be used during the frosty period,
the boiler must be emptied!
- Turn off the power to the water pump (main switch or pump switch).
- Turn on the hot water taps in the kitchen and bathroom.
- Place a suitable container (10 liters) under the discharge port (d) of the safety/
drain valve to control the flowing water.
- Open the safety / drain valve (see section “Opening the safety / drain valve”).
- The boiler is emptied directly to the outside via the safety/drain valve. Check
whether the water in the boiler (10 liters) is completely drained into the container
via the safety / drain valve.
No warranty can be claimed for damage caused by freezing!
2.13 Commissioning
Combi E
(in conjunction with the CP plus control unit) The interior can be heated with or
without water in gas, electric and mixed operation, depending on the operating
position.
Check whether the protection fuse of the electricity supply in the campsite is suf-
ficient for the 900 W (3.9 A) or 1800 W (7.8 A) power set via the energy selection
switch.
The cable reel must be fully opened to prevent the power supply cable from
overheating.
- Check whether the chimney is open and has free air flow
- Open the gas cylinder and the quick shut-off valve on the gas supply pipe.
- If necessary, fill the boiler with water (see section “Filling the boiler”).
- Turn on the device using the control unit.
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