Connection Diagram - Dimplex Dhw 301P Montage- Und Gebrauchsanweisungen

English
8.2. Technical water connection
It is essential to install a safety mechanism in the cold
water inlet (not supplied – special accessories SVK 825
- 326660).
This safety group must adhere to the national stand-
ards and comply with DIN 1988, Part 2;
DIN 4753, Part 1 and DIN EN 1488.
The safety group must be installed as close as possi-
ble to the cold water inlet on the device and the water
flow must not be obstructed by any fittings (valves,
pressure reducers etc.).
The drainage outlet from the safety group must be in-
stalled in a frost-free environment and have a down-
ward slope.
The drainage outlet from the safety group must be
designed in accordance with DTU regulations (stand-
ardised technical documents) 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
diameter that corresponds at least to that of the
connection line of the device.
If the pressure in the cold water inlet is more than
5 bar, a pressure reducing valve must be installed up-
stream of the safety group at the infeed to the main
system (a pressure of 3 to 4 bar is recommended).
We recommend fitting 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.

Connection diagram

Domestic
hot water (dhw)
Condensate drain hose
Cold water
(CW)
1 Isolation valve
2 Pressure reducing valve
3 Check valve
4 Insulating dielectric sleeve, optional
5 Diaphragm safety group
7 Drainage siphon
8 Expansion vessel
EN-10
9 Thermostatic mixer
(scalding protection)
10 Drain valve
The following materials must be used for the domestic
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
domestic hot water pipes must be carried out with a
cast or steel connection or using dielectric connec-
tions, which prevent any galvanic bridge (iron/copper).
The supply line upstream of the device connection to
the sanitary installation must be flushed well so that
no metal parts or other foreign bodies are transported
into the device.
The standards applicable at the installation location
must be complied with, in particular with regard to the
sanitary conditions and the pressure safety condi-
tions.
NOTE
The maximum domestic hot water temperature value
must not exceed 60 °C at the tapping points. Suitable
thermostatic mixers must be installed in the domestic
hot water flow to rule out any risk of scalding.
The device operates with water with a total hardness
of less than 17 °dH. For particularly hard water (total
hardness >14 °dH), we recommend using a water sof-
tener.
Failure to observe the conditions outlined above will
void the warranty for the use of the cylinder (the val-
ues apply for a water temperature of 20 °C).
Specific resistance
Water hardness
Free CO2
++
Calcium (Ca )
Sulphate (SO --)
4
Chloride (Cl-)
Sulphate and chloride
-- -
(SO + Cl )
4
FD 0303
Connection
2200 V.cm < R < 4500 V.cm
> 1.6 l eq. < 17 °dH
<15 mg/l –
> 1.6 l eq. > 4.5 °dH
< 2 l eq. > 5.6 °dH
< 2 l eq. > 5.6 °dH
< 3 l eq. > 5.6 °dH
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