Danfoss DWH 200, Installation & Maintenance

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3
VMBNB72J
Ÿ
Pipe installation must be carried out by an authorized installer .
The installation must be carried out according to the appli-
cable building regulations .
Ÿ Cold and hot water lines and overflow lines from safety valves
must be made of heat resistant and anti-corrosive material,
e .g . copper . The safety valve’s overflow lines must have an
open connection with the outlet and be visible in a frost free
environment .
⚠ NOTE! The tank must be connected to an expansion tank
and safety valve in such a way that the connection cannot
be shut off .
1.5 Temperature
Ÿ Highest permitted temperature on DWH primary side is 100°C .
On the secondary side the temperature is limited to 90-95°C
due to the factory installed safety valve for temperature and
pressure .
2 Maintenance
2.1 Water temperature
Ÿ According to the building regulations, output hot water tem-
perature must not exceed 65°C . At higher tank temperatures
the mixing valve can be installed to limit the output hot water
temperature .
Ÿ
Output temperature should be kept as low as possible, alt-
hough +45°C at the lowest at the tap .
Ÿ
The lower the temperature in the system the lower the heat
losses from the pipes and valves .
2.2 Safety valve
The safety valve is protection against the over pressure in the
closed hot water tank and must therefore be regularly inspected .
Ÿ
The safety valve can be checked by turning the cap until the
valve lets out some water through the overflow pipe . This
must be carried out at least four times a year .
Ÿ If a safety valve does not work properly, it must be replaced .
CONTACT AN AUTHORISED TECHNICIAN!
Ÿ If the safety valve is not checked regularly, the hot water tank
might be damaged .
Ÿ It is quite normal for the safety valve to let out small amounts
of water when the hot water tank is being charged, especially
if a lot of hot water was used previously . The opening pressure
of the safety valves is not adjustable .
Ÿ The safety valve is mounted on the cold water inlet line, hori-
zontally with its outlet opening facing downwards .
2.3 Water quality
The indirect heating of the water for consumption is an advan-
tage, which makes Danfoss DWH suitable in areas with high cal-
cium levels in the water . In installations where the water comes
from a well the water should be checked to ensure that it cannot
cause damage to the hot water installation .
Ÿ Stainless steel tanks and pipes should not be exposed to water
with high chloride levels .
⚠ With very poor water quality, a water filter must be instal-
led in the installation . A water analysis will provide indica-
tion of any necessary remedial actions .
2.4 Sensors
When DWH is installed in conjunction with DHP-L connect the
sensors in the water heater to the following connections:
Ÿ
Sensor hot-water – 311-312
Ÿ
Sensor hot-water top – 325-3262 .4 Minimum headroom
2.5 Minimum headroom
1905 1620
DWH 300
DWH 200
Figure 3: Minimum headroom .
2.6 Installation carried out by:
PIPE INSTALLATION
Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tel . No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL INSTALLATION
Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tel . No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
If these instructions are not followed during installation, ope-
ration and maintenance, Danfoss AS’s liability according to the
applicable warranty is not binding .
Danfoss AS retains the right to make changes to components
and specifications without prior notice .