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Preparing for boiler installation
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Fig. 3
(cont.)
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.
2. Prepare the connections on the DHW side. Install
the safety assembly (accessories or on-site provi-
sion) in accordance with EN 806 [or local regula-
tions] in the cold water supply. See the following
chapter.
Recommendation:
Install the safety valve above the DHW cylinder to
protect it against contamination, scaling and high
temperatures.
: According to W3 "Principles for creating pota-
c
ble water installations", safety valves must be
drained directly via a visible unrestricted drain or
via a short outlet line to the drain network.
Note
Do not connect the DHW cylinder safety valve to
hose
(used for ventilation).
3. Route condensate hose
(see diagram on page 12).
Connect condensate hose with a fall to the on-site
waste water pipe or trap.
Note
■
The on-site waste water pipe must have min.
Ø 40 mm to allow inflow with no risk of backing
up.
■
Keep the drainage route from the appliance as
short as possible.
Do not connect the drain hose directly to the on-
■
site waste water pipe. To prevent bacterial con-
tamination from the drain network, observe a
minimum clearance of 20 mm (see diagram).
!
Note
Route the onward drain line inside the building as
far as possible.
If the onward drain line is routed outside the build-
ing:
■
Use a min. Ø 30 mm line.
■
Protect the line from frost.
Keep the line as short as possible.
■
Preparing for installation
. Do not change the position of hose
L
M
to side opening
Please note
The drain hose is used to route away any
hot water discharged from the safety valve.
Lay and secure the drain hose in a way that
prevents any risk of scalding.
L
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13
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