Gas Connection; Water Connection - Truma Combi E CP plus ready Einbauanweisung

Gas connection

The operating pressure of the gas supply (30 mbar)
must be the same as the operating pressure of the
device (see type plate).
The ducts must be routed in such a way that the device is
easy to remove for service work.
The gas supply line (8-mm dia.) must be attached to the gas
connection (20) with an olive screw fitting (19, included in
delivery depending on version). Carefully counterhold with
another wrench when tightening!
The gas connection (20) on the device may not be shortened
or bent.
20
19
Fig. 13
Before connecting to the device, please ensure that the gas
ducts are free of dirt, swarf and the like!
The number of separation points in the gas supply line in
rooms used by persons must be limited to the technical
minimum.
The gas system must comply with the technical and admin-
istrative regulations of the respective country of use (e.g.
EN 1949 in Europe).
The national legislation and regulations (e.g. DVGW Work
Sheet G 607 for vehicles in Germany) must be observed.

Water connection

Any pressure or immersion pump up to 2.8 bar can be used to
operate the boiler, as can any mixing battery with or without
an electric switch.
When connecting to a central water supply (regional or public
connection) or when powerful pumps are being used a pres-
sure reducer must be deployed to prevent pressures exceed-
ing 2.8 bar from occurring in the boiler.
Before the pressure relief valve triggers, warming of the
water and its resulting expansion may cause pressure of
up to 4.5 bar to occur (also possible with immersion pumps).
The water lines for connecting to the boiler and the safety/
drain valve must be drinking water safe, pressure resistant
(up to 4.5 bar) and hot water resistant up to +80 °C.
If using immersion pumps, a non-return valve (21, not
included in delivery) must be installed between the pump and
the first branch. Observe the direction of flow when install-
ing the non-return valve. (See fig. 14 – Example of installation
with flexible hoses Ø 10 mm.)
28
29 27 25
Fig. 14
When pressure pumps with a large switching hysteresis are
being used, hot water can flow back via the cold water valve.
We recommend installing a non-return valve (22, not included
with delivery) between the outlet to the cold water valve and
the safety/drain valve to prevent return flow. Observe the
direction of flow when installing the non-return valve. (See fig.
15 – Example of installation with flexible hoses Ø 10 mm.)
28
29 27 25
Fig. 15
Installation with flexible hoses (Ø 10 mm)
The elbow fittings (27 + 28) and the safety/drain valve (24)
have a connection with Ø 10 mm. All hose connections
must be secured with hose clamps (including the cold water
connection).
Installation with fixed duct routing (Ø 12 mm)
The elbow fittings (27 + 28) and the safety/drain valve (24)
have an inner connection with Ø 12 mm. We recommend the
use of John Guest ducts, insertion sleeves and locking rings.
Appropriate adapters are available for connecting ducts with
different diameters (not included in scope of delivery).
26
23 21
24
26
23
22
24
15