Danfoss DWH Installation guide

Danfoss
Brand
Danfoss
Model
DWH
Type
Installation guide
VMBNB72J
EN – Installation/Maintenance ..........................2
EN – UK-specific appendix ..............................4
DE – Installation/Wartung .............................11
DA – Installation/Vedligeholdelse ......................13
NL – Installatie/Onderhoud ............................15
FR – Installation/Maintenance .........................17
ES – instalación/Mantenimiento .......................19
PL – Instalacja/ Konserwacja . . . . . . . . . . . . . . . . . . . . . . . . . . .21
CS – Instalace/Údržba .................................23
ET – Paigaldamine/ Hooldus ...........................25
DWH Opti
DWH
2
VMBNB72J
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
455
596
690
40 ±10
1
23
4
5
6
7
H
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
13
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
3
VMBNB72J
Pipe installation must be carried out by an authorized installer.
The installation must be carried out according to the appli-
cable building regulations.
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
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
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.
Output temperature should be kept as low as possible, alt-
hough +45°C at the lowest at the tap.
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.
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.
If a safety valve does not work properly, it must be replaced.
CONTACT AN AUTHORISED TECHNICIAN!
If the safety valve is not checked regularly, the hot water tank
might be damaged.
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.
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.
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:
Sensor hot-water – 311-312
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.
4
VMBNB72J
EN – UK-specific appendix
Important information/Safety regulations1
E
For important information and safety regulations, please read the Danfoss DWH installation/maintenance manual.
E
Hard Water Areas; In areas where exceptional water conditions prevail, consideration may need to be given to the fitting
of a device capable of inhibiting scale. In such circumstances the advice of the local water authority should be sought.
E
Note! Leave this document with the end-user.
This document is an integral and essential part of the product. It should be kept with the appliance so that it
can be consulted by the user and our authorised personnel.
Please read carefully the instructions and notices about the appliance contained in this manual, as they pro-
vide important information regarding the safe installation, use and maintenance of the water heater.
Heat up time
The heat up time is measured when heating the water from 14°C to 60°C.
DWH 300: Heat up time 1 hour 53 min
DWH 200: Heat up time 1 hour 3 min
Re-heat time
The re-heat time is measured when 70% of the hot water has been drained and replaced by equal amount
14°C water and re-heated to 60°C.
DWH 300: Re-heat times 70% 1 hour 25 min
DWH 200: Re-heat time 70% 41 min
5
VMBNB72J
Manufacturer labels1.1
The water heaters are marked with durable, permanently fixed labels.
Manufacturer labels1.1.1
6
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Additional label1.1.2
Maximum water supply pressure 10 bar
Pressure reducing valve 3 bar
Expansion valve 6 bar
Expansion vessel charge pressure 3 bar
Operating pressure 5,5 bar
Temp and pressure release valve 10 bar; 90-95 deg
Maximum primary working pressure 1,5 bar
WARNING TO THE USER
(a) Do not remove or adjust any component part of this
unvented water heater. Contact the installer.
(b) If this unvented water heater develops a fault, such
as a flow of hot water from the discharge pipe,
switch the heater off and contact the installer.
WARNING TO THE INSTALLER
(a) This installation is subject to building regulation
approval, notify the Local Authority of intention to
install.
(b) Use only manufacturer's recommended
replacement parts.
(c) INSTALLED BY:
Name._________________________________
Address._______________________________
Tel No.________________________________
Completion date_________________________
This label will ensure that this product conforms to the
requirements of United Kingdom Building Regulations.
The information is entirely valid in a UK specific installation.
Weight when full (kg)
DWH-200 321
DWH-300 433
DWH-A 352
Product *)
*) Incl. DWH Opti
7
VMBNB72J
Piping installation1.4
Unvented package DHP and DWH2001.4.1
Danfoss code reference UNV0180.
Package contents:
Position Danfoss code
Number
Description
2 FITT0050 1 Expansion vessel 12 Litre
- FITT0052 1 Expansion vessel bracket
3 FITT0053 1 Flexible hose
- FITT0001 1 Tundish 15x22mm
5 FITT0054 1 Unvented manifold assembly
Unvented package DWH3001.4.2
Danfoss code reference UNV0300.
Package contents:
Position Danfoss code
Number
Description
2 FITT0051 1 Expansion vessel 19 Litre
- FITT0052 1 Expansion vessel bracket
3 FITT0053 1 Flexible hose
- FITT0001 1 Tundish 15x22mm
5 FITT0054 1 Unvented manifold assembly
Unvented manifold assembly1.4.3
E
A
B
C
D
Unvented manifold assembly.Figure 3.
Position Name
A Pressure reducing valve
B Non-return valve
C CW to house
D To expansion vessel
E Safety relief valve
Temperature and pressure relief valve1.4.4
Factory fitted temperature and pressure relief valveFigure 4.
8
VMBNB72J
Unvented package installation, DWH 200, DWH 3001.4.5
CW to
house
HW to
house
Return line
heating system
Supply line
heating system
Heat pump
CW
1
2
10
6
7
8
6
9
11
6
5
3
Unvented manifold assembly
(see figure 1)
DWH 200
DWH 300
3
The principal installation solution of the unvented package on a DWH.Figure 5.
Position Name
1 Factory fitted combined Temperature and Pressure Relief Valve
*
2 Expansion Vessel
3 Flexible hose
5 Unvented manifold assembly: Pressure Reducing Valve, Safety Relief Valve,
Non-return Valve
6 Shut-off Valve
7 Double Check Valve with Shut-off Valve
8 Flexible hose
9 Safety Relief Valve
10 Expansion Vessel Heating System
11 Strainer
*
) The water heater tank in DWH is factory fitted with a Temperature and Pressure Relief Valve. The connec-
tion from this valve must not be used for other purposes other than discharge pipe connection. Please see
next page for Discharge Pipe Arrangement.
E
Note! No valve should be fitted between the safety relief valve and the storage cylinder.
9
VMBNB72J
Discharge pipe arrangement
B
The tundish must be positioned away from any electrical devices.
D
The tundish must be installed so that it is visible to the occupants.
3
4
5
6
1
2
500mm max
300mm min
The principal installation solution of the discharge pipe assembly.Figure 6.
Position Name
1 Safety device (for example, temperature relief valve)
2 Metal discharge pipe from safety device to tundish
3 Tundish
4 Metal discharge pipe from tundish, with continuous fall
5 Discharge below fixed grating
6 Trapped gully
Sizing of copper discharge pipe (4) for common temperature relief valve outlet sizes
Valve
outlet
size
Minimum
size of
discharge
pipe (2)
Minimum size of
discharge pipe
(4 from tundish)
Maximum resistance allo-
wed, expressed as a length
of straight pipe (that is, no
elbows or bends)
Resistance created
by each elbow or
bend
G1/2 15mm
22mm Up to 9m 0.8m
28mm Up to 18m 1.0m
35mm Up to 27m 1.4m
G3/4 22mm
28mm Up to 9m 1.0m
35mm Up to 18m 1.4m
42mm Up to 27m 1.7m
G1 28mm
35mm Up to 9m 1.4m
42mm Up to 18m 1.7m
54mm Up to 27m 2.3m
10
VMBNB72J
How to flush the tap water system
When the tap water and the heating system have been filled up, the unit shall be running at maximal, normal
operating temperature for a minimum of one hour. After that the tap water system shall be flushed out and
re-filled.
How to drain the tap water system
After the tap water system has been flushed out, the cold and hot water pipes and the water heater tank
need to be drained. To drain the system follow the instructions below:
1. Close the shut-off valve on the incoming water supply.
2. Open both cold and hot water taps which are situated as low as possible in the building to depressu-
rise the system.
E
Please note that there can be some water remaining in the cold water pipe which must be taken care of when loosening
the pipe.
3. Loosen and remove the cold water pipe at the top of the heat pump.
4. Insert a plastic hose to use as a siphon into the cold water connection and bring it to the bottom of the
water heater tank.
5. Place the other end of the hose near a gully.
6. Use the siphon effect to empty the water heater tank.
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Danfoss DWH Installation guide

Danfoss
Brand
Danfoss
Model
DWH
Type
Installation guide
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