REMEHA Gas HP 35 A HT, Service Manual

Page: 36 / 48

Remeha Gas HP 35 A
(LT/HT)
36
‡ The lengths shown in the table include the pre-wired CAN-
bus cable parts in the skid.
The lengths of the pre-wired parts on the skid are as
follows:
‡
12 m for a skid with two units
‡ 18 m for a skid with three units
‡ 24 m for a skid with four units
‡ PIRUDVNLGZLWK¿YHXQLWV
‡ )RUWRWDOGLVWDQFHV”PDQGQHWZRUNVZLWKDPD[LPXP
of six nodes (e.g. three GAS HP units and three CAN-
OpenTherm interfaces), a single, protected 3 x 0.75 mm
FDEOHLVVXI¿FLHQW
‡
The CAN-connection requires a CAN-bus cable with three
wires. If the available cable has more than three coloured
ZLUHVXVHWKHZLUHVZLWKWKHFRORXUVDVVSHFL¿HGLQWKH
WDEOHDQGFXWWKHRWKHUVXSHUÀXRXVZLUHVRII
The entire length of the CAN-bus cable must be protected with
a casing that meets the following requirements:
‡
Nominal diameter 17 mm
‡ T-section
‡ Max. operating temperature 105°C
‡
Flame retardant
‡
Resistant to acid, oil, solvents and fuels
The TEAFLEX PAS T 17S casing meets these requirements.
7.5.2 Connecting the CAN-bus to the GEP connectors -
single skid
The CAN-bus cable must be connected to the special
connectors that are located on the general switch box (GEP).
Proceed as follows:
m
WARNING
Make sure the skid has been disconnected from the power
supply before starting work on the electrical panel.
1. Open the GEP with the supplied key and remove the closed
panel (A) by unscrewing the four screws ( see Fig. 20 ).
2. Cut off a piece of cable that is long enough for the
connection without any loops forming.
3. Remove approximately 70-80 mm of the cable casing and
the wires within it. Make sure you do not cut into the cable
protection (plaited metal or aluminium foil and, if present,
the bare connection in contact with the plait).
CABLE NAME SIGNAL/COLOUR* MAX. LENGTH
Honeywell SDS 1620 standard
BELDEN 3086A H = BLACK L = WHITE GND = BROWN 450 m
TURCK type 530
DevideNet Mid Cable
TURCK type 5711 H = BLUE L = WHITE GND = BROWN 450 m
Honeywell SDS 2022 standard
TURCK type 531 H = BLUE L = WHITE GND = BROWN 200 m
* In all cases: do not use the fourth wire.
Table 07 CAN-bus cable types