10
1.
Prepare the connections on the heating water side.
Thoroughly flush the heating system.
Note
Should an additional expansion vessel be required
on site, connect this vessel in the heating return.
M
L
>200
N
Fig. 3
L
Trap air vent valve
M
Condensate drain hose
N
Cable holder
2.
Prepare the connections on the DHW side. Install
the safety assembly (accessories or on-site provi-
sion) in the cold water line to DIN 1988 and
EN 806 (see page 11).
Recommendation:
install the safety valve above the DHW cylinder to
protect it against contamination, scaling and high
temperatures.
c
: according to W3 "Principles for creating pota-
ble water installations", safety valves must be
drained directly via a visible unrestricted drain or
via a short outlet line to the drain network.
3.
Prepare the condensate connection to the on-site
drain line or trap:
■
Drain towards the back:
see dimensions for condensate hose
M
and
position
G
in diagram on page 9.
■
Drain towards the side aperture:
see position
H
in diagram on page 9.
Note
Do
not
connect the DHW cylinder safety valve to
hose
L
. Do
not
change the position of hose
L
(used for ventilation).
Route the condensate hose with a U-bend. Con-
nect it with a fall to the on-site drain line or a trap.
4.
Prepare the gas connection according to TRGI or
TRF [or local regulations].
5.
Prepare electrical connections.
■
The appliance is delivered fitted with an approx.
1.5 m long power cable. Route the cable out-
wards through the cable holder in area
N
. Max.
MCB/fuse rating 16 A, 230 V~, 50 Hz (duct rout-
ing, see page 18).
■
Accessory cables: 0.75 mm² flexible cable with
required number of cores for external connec-
tions
Preparing for installation
Preparing for boiler installation
(cont.)
5789 302 GB
Installation
Summary of Contents for B2TB
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