Connection - Dimplex DHW 250P Installation And Operating Instructions Manual

Connection

8. Connection
8.1. Air-technical connection
The device is designed for use without an air duct.
When using an air duct for intake, a total length of 2 m
with a maximum of two 90° elbows is permitted. Fail-
ure to observe these regulations will void the manu-
facturer warranty
Without an air duct, the device must be installed in an
unheated room (at least 20 m²) separate from neigh-
bouring heated rooms.
If the clear height under the ceiling over the device is
less than 60 cm, it is advisable to install an elbow on
the air outlet and to direct it to the rear or to the sides.
The domestic hot water heat pump can also be used
in unheated workshops and garages if the parameters
listed in chapter 7 are complied with.
The domestic hot water heat pump enables dehumid-
ification and cooling of rooms such as laundry rooms
and storerooms.
8.2. Connecting the water pipes
A new safety group (not included in the scope of sup-
ply) must be installed that is set to 6 bar on the cold
water inlet of the device. We recommend installing a
safety assembly.
This safety group must correspond to the national
standards and comply with DIN 1988, Part 2;
DIN 4753, Part 1 and DIN EN 1488.
The safety group must be mounted as close as possi-
ble to the cold water inlet of the device and
the water flow must never be obstructed by an acces-
sory (valve, pressure reducer etc.)
The drainage outlet of the safety group must be in-
stalled in a frost-free environment and have a down-
ward slope.
The drainage outlet of the safety group must be de-
signed according to the standard and must never be
blocked. It must be connected via a funnel (at least
20 mm to free air) to a vertical outlet line with a diam-
eter that corresponds at least to that of the connec-
tion line of the device.
If the pressure on the cold water inlet is more than
5 bar, a pressure reducing valve must be installed up-
stream of the safety group on the flow.
We recommend mounting an isolation valve before
the safety group.
For systems
with pipes with a small diameter,

with a ceramic ball cock

valves must be installed as close as possible to the
cocks, or an expansion vessel adapted to the system,
to prevent pressure surges.
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Connection diagram
1 Isolation valve
2 Pressure reducing valve
3 Check valve
4 Dielectric insulation sleeve, optional
(not included in the scope of supply)
5 Safety assembly (SVK 825)
(not included in the scope of supply)
7 Siphon drain
8 Expansion vessel
9 Thermostatic mixer
10 Drain valve
The following materials must be used for the domes-
tic hot water circuit:
Copper

Stainless steel

Brass

Plastic

NOTE
Depending on the materials used for the domestic hot
water circuit, corrosion-related damage may occur
due to incompatibilities.
For this reason, connection of the device to copper do-
mestic hot water lines must be carried out with a cast or
steel connection or using dielectric connections (not in-
cluded in the scope of supply), which prevent any gal-
vanic bridge (iron/copper).
FD 0207
English
EN-9