EN – Installation/Maintenance
1 Installation
E
Directly after this chapter you will find a UK-specific appen-
dix which must be read before installing this product.
E
Danfoss hot water heaters are factory fitted with a safety
valve for temperature and pressure, 10 bar 90-95°C,
due to requirements in United Kingdom. The valve is placed
into the water tank and must not be used for other purposes
than discharge pipe connection.
Please also note that for DHP-H Opti Pro SP heat pumps
it is therefore imperative that the maximum hot water tem-
perature is altered from the default factory setting from
95°C to 85°C. Refer to chapter 14.2 menu Service – HGW
Parameter MAX TEMP in the heat pump installation manual.
1.1 Product description
Danfoss DWH is a modern and efficient storage tank with a very
wide range of uses for hot water production.
Hot water heater Danfoss DWH is specially designed to comple-
ment the Danfoss heat pumps.
Together they will be an aesthetically pleasing part of the new
room that you will obtain by removing your old boiler and oil
tank. Naturally, they also give the highest heating and water hea-
ting comfort.
Through a completely new technology - TWS- Danfoss has
created an optimised hot water tank. TWS stands for Tap Water
Stratificator. This technology results in more effective heat trans-
fer and more effective layering of the water in the hot water
tank.
Danfoss DWH is available in two sizes, 200 and 300 litre with a
stainless steel tank. The hot water tank is used in installations
where the hot water is produced by another heat source - any
energy forms can therefore be used with it.
The hot water tank is designed according to Pressure equipment
97/23/EC article 3.3.
1.2 Connections and dimensions
Danfoss DWHFigure 1.
Position Name
1 Return line Ø 22 mm
2 Hot water Ø 22 mm
3 Cold water Ø 22 mm
4 Supply line Ø 22 mm
5 Electric lead in
6 Ventilation
7 Combined temperature and pressure relief valve
Danfoss DWH 200 300
Volume Sec/Prim, l 180/7.5 286/10
Design pressure Sec/Prim MPa 1.0/0.3 1.0/0.3
Test pressure Sec/Prim MPa 1.43/0.43 1.43/0.43
Dry weight, kg 141 147
Filled weight, kg 321 433
Height, H*, mm 1538 1845
*) The height applies with the feet set at the lowest level
1.3 Assembling
To remove the front, carry out the following:
Remove the packaging.1.
Press against the front cover; and turn the catch 90° degrees 2.
anti-clockwise to release the front cover.
Tilt the front cover outwards.3.
Lift the front cover upwards to remove it from the heat 4.
pump.
Positioning
Locate the Danfoss DWH on a floor with sufficient strength.
The room must be equipped with a floor drain.
Danfoss DWH is intended for upright installation.
The hot water tank is positioned and then the pipes are con-
nected. If the tank is to be installed together with a heat pump
it must be positioned beside the heat pump and connected
with a flexible connection.
1.4 Pipe installation
General connection diagram Danfoss DWH.Figure 2.
Position Name
1 Supply line
2 Return line
3 Safety valve cold water
4 Safety valve heating system
5 Expansion vessel heating system
6 Strainer
7 Flexible hoses
8 Vacuum valve
9 Non-return valve
10 Shut-off valve
11 Cold water
12 Hot water
13 Heat pump
14 Danfoss DWH water heater
16 Combined temperature and pressure relief valve
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