Electrical Connections - Truma Combi eco Installation Instructions Manual

Electrical connections

The furnace must be electrically grounded in ac-
cordance with local codes or, in the absence of
local codes, with the National Electrical Code,
ANSI/NFPA 70, and/or the Canadian Electrical
Code, CSA C22.1, Part 1, if an external electrical
source is utilized.
Hazard due to electrical current!
Improper installation can cause property dam-
age, personal injury or loss of life.
• Installation must be performed by a
licensed electrician as per national/local
regulations.
• Before work can begin, the power sup-
ply must be switched off and all poles
disconnected.
Fire hazard and risk of short circuit due
to unsuitable or improperly installed
connector cables!
• Due to temperatures in excess of 221 °F
(105 °C), never attach or run connector
cables near
– metal surfaces of equipment,
– aluminum frame feet,
– exhaust tubes, or
– warm air ducts.
• Install connector cables in a way that they
cannot fray. In the case of sharp edges
(such as leadthroughs of metal walls) use
leadthrough bushings or edge protectors.
• All lines that extend outside the RV must
be splash-proof at the RV's side wall.
• Use the specified cable cross-sections only.
• Never connect additional electrical compo-
nents to the connector cables.
• Connector cables and lines must be se-
curely fastened; they must not become
loose or be disconnected due to vibration.
• Electric lines, switching equipment, and
control units for the Combi furnace must
be arranged in such a way in the RV that
they will function flawlessly under normal
operating conditions.
24
Electrical connections are underneath the fur-
nace's connection cover (Fig. 35 – 39). While
detaching or reattaching the connection cover,
take care to neither dislodge nor pinch the con-
nector cables.
1. Remove the connection cover by simultane-
ously depressing and sliding it as indicated
by the arrow.
39
40
12 V
Fig. 35
39 Connection cover
40 Input voltage +12 V
41 Input voltage ground
42 Unassigned
43 T10A time-delay fuse, 12 V
44 Wire bridge
45 Unassigned
46 Room temperature sensor
47 CP plus control panel / Diagnostic connector*
48 CP plus control panel / Diagnostic connector*
* Alternative connections
• All electrical connections to the furnace
must consist of sagging connector cables.
This will prevent condensation from water
seeping into the furnace via the connector
cables.
Fig. 36
• The connector cables and connectors must
not be subjected to any strain.
– Use a cable tie to bundle each set of con-
nector cables and secure them to the hous-
ing to provide strain relief (Fig. 37).
open
42 44 48
46
41 43 45 47