Start-Up; Switching Off; Maintenance; Solar Systems - Truma Combi Operating Instructions Manual

Start-up

Combi
The interior can be heated either with or without water, de-
pending on the setting.
Combi E (in conjunction with CP plus control panel)
The interior can be heated in gas, electric or mixed mode,
either with or without water depending on the setting.
Check whether the power supply fuse protection at
the camp site is adequate for the 900 W (3.9 A) or
1800 W (7.8 A) that have been selected using the
power selector switch.
The cable drum must be fully unwound in order to pre-
vent the power cable from overheating.
– Check to make sure the cowl is unobstructed. Be sure to
remove any covers that may be present.
– Open the gas cylinder and the quick-acting valve in the gas
supply line.
– Fill boiler with water if necessary (see "Filling the boiler").
– Switch on the appliance on the control panel.

Switching off

– Switch the heater off on the control panel.
– The switch-off procedure may be delayed by several min-
utes because of internal heater operations.
Always drain water contents if there is a risk of frost!
If the appliance is not used for a long period, close the quick-
acting valve in the gas supply line and the gas cylinder.

Maintenance

Maintenance, repairs and cleaning must not be done by
children.
Work by experts
– Have an expert check the appliance for dirt and clean it if
necessary.
Work to be done by the user
– Clean the compartment where the appliance is installed at
least once annually.
– The safety/drain valve must be operated regularly (at least
twice annually) to remove limescale deposits and to be cer-
tain that it is not blocked.
Notes on cleaning, sterilising and care
We recommend the use of suitable commercially available
products to clean, sterilise and maintain the boiler. Products
containing chlorine must not be used.
The effectiveness of the use of chemicals to combat micro-
organisms in the appliance can be increased by heating the
water in the boiler to 70 °C at regular intervals.
Only Combi E heater in conjunction with CP plus control panel
– Select "Gas mode" on the CP plus control panel.
– Set the water temperature to 60 °C.
– Switch on the appliance.
Once the water in the boiler has reached a temperature
of 60 °C, the burner will switch off. The appliance must
stay switched on for at least 30 minutes and no hot water
may be removed. The residual heat in the heat exchanger will
heat the water up to 70 °C.

Solar systems

When a solar system is used, EN 1648 stipulates that
a battery (with charge regulator) or a voltage regulator
(output voltage 11 V – 15 V; alternating voltage ripple < 1.2 Vss)
must be connected between the solar system and the heater at
all times. Otherwise, the heater electronics can be damaged by
an irregular voltage supply from the solar system.
– When disconnecting the battery, always disconnect the
charge regulator from the battery first.
– When connecting the battery, always connect the charge
regulator to the battery last.
We provide no warranty on heater electronics that have
been damaged by an irregular voltage supply from the
solar system.

Fuses

Electrostatic charging can destroy the electronics.
Ensure that potential compensation is present before
touching the electronics.
Fuse 12 V
Before opening the connection cover, disconnect the
appliance at all poles from the 12 V voltage supply.
The fuse is in the electronics beneath the connection cover.
Always replace the fuse of the appliance with an identical
fuse.
Appliance fuse: 10 A – quick-acting – 5 x 20 mm (F 10 A)
Figure 5
230 V

fuse (Combi E)

Risk to life from electric shock when changing the
fuse or the power supply lines.
– The fuse and the power supply lines must only be replaced
by an expert.
– The appliance must be disconnected from the mains at all
poles the electronics cover is opened.
The fuse is in the power electronics (14) beneath the electron-
ics cover.
This fine wire fuse must always be replaced with a fuse of the
same type: 10 A, quick-acting, interrupting capacity "H".
Figure 6
F 10 A
14
F 10 A
9