Danfoss WL Fact sheet

Fact Sheet

Instantaneous water heater for large apartment houses or large properties

FEATURES AND BENEFITS

•• Instantaneous water heater with highly efficient heat exchanger – suitable for large apartment houses comprising between 29-130 apartments

•• Self-acting thermostatic or Danfoss ECL electronic control of DHW temperature

•• Equipped with A-labelled lowenergy pump for DHW circulation

•• Capacity: 135-300 kW

•• Insulated heat exchanger

•• Pipes and heat exchangers are made of stainless steel AISI 316

•• The water heater is very service-friendly due to practical piping and assembly

Application

The WL is an instantaneous water heater featuring high performance and simple operation. The WL is especially suitable for large apartment houses comprising between 29-130 apartments or a large property/sporting association comprising bathing facilities for 10-20 persons.

Construction

The WL water heater is prefabricated with a brazed, insulated Danfoss plate heat exchanger for domestic hot water production, thermostat/thermostats or Danfoss ECL 110 electronic controller for domestic hot water control, shut-off valves, thermometers, balancing valve, safety and non-return valves as well as A-labelled low-energy pump. Alternatively the water heater can be supplied with a Danfoss ECL 310 controller as replacement for the ECL 110 controller. It is recommended to installa a differential pressure controller in fron of the water heater, if the differential pressure from the district heating plant exceeds 0.8 bar, to avoid cyclic variations.

Design

The WL substation is designed for wallmounting and it is made in a compact design for quick and simple installation and it can be delivered with a white-lac- quered steel sheet cover with door.

Domestic hot water (DHW)

The domestic hot water is prepared in a high-performance heat exchanger based on the flow principle. Supreme ease of operation is obtained via thermostatic control of the domestic hot water through two self-acting thermostatic valves connected in parallel. Alternatively the water heater can be supplied with Danfoss ECL 110 electronic control fitted in the water heater from factory for DHW temperature control.

Domestic hot water circulation

The WL is supplied with connection for DHW circulation as a standard, and is supplied with an A-labelled circulation pump, non-return valve and balancing valve. Pump, balancing valve and

non-return valve are fitted as standard on the circulation pipe so that the pump flow direction is towards the water heater. The WL is applicable only on systems with DHW circulation and if the household installation does not feature domestic hot water recirculation, internal recirculation must be established in the technical control room, ensuring a constant flow on the secondary side. Hot water installations with DHW circulation ensures tapping of hot water without any delay, – ensuring the best possible efficiency and economy.

Service and maintenance

Proper piping and connections made by nuts and gaskets makes the water heater very service-friendly and easy to install. It is mounted on the wall and as all connections are placed in pipe bracket distance from the wall, it is possible to establish a nice piping.

www.danfoss.com

CIRCUIT DIAGRAM – EXAMPLE WITH DANFOSS ECL CONTROLLER

Note:

Plate heat exchanger

12.

Safety valve

It is recommended to install a differential pressure

Non-return valve

13.

Thermometer

controller in front of water heater, if the differential

6a.Non-return valve

20.

Balancing valve

pressure from the district heating plant exceeds 0,8

Ball valve

25.

Controller Danfoss ECL 110*

bar, to avoid cyclic circulation.

Circulation pump A

28.

Sensor

31.

Actuator

32.

Valve**

Can be ordered with Danfoss ECL 310

DHW

as replacement for ECL 110 at an

Supply

additional charge

**)

Alternatively with self-acting

thermostat(s)

DCW

Return

= G 1“ (ext. thread)

DCW, DHW = 5/4“ (int. thread)

Circ.

= ¾“

(int. thread)

Design specifications

500

Code No’s:

Nominal pressure (prim/sec.): PN 16 / PN 10

270

WL with HEX type:

Cover:

Code No.:

<![if ! IE]>

<![endif]>25

Max. supply temperature:

120 ºC

XB 37M-1 601

004B6069

Min. ΔP:

See capacity examples

Chloride compounds:

Max. 300 mg/l

600

XB 37M-1 701

Without

004B6057

Weight incl. cover:

Max. 80.0 kg (incl. packing)

XB 37M-1 802

004B6061

Cover:

White-lacquered steel sheet

<![if ! IE]>

<![endif]>905

XB 37M-1 603

144B2046

Dimensions (mm)

H 1017 × W max. 580 × D 320

XB 37M-1 703

144B2047

Without cover:

XB 37M-1 803

Without

144B2048

With cover:

H 1000 × W 600 × D 400 mm*

H 1200 x W 840 x D 450 mm**

XB 37M-1 1003

004U8414

* Cover for code no’s 004U6069, 004U6057, 004U6061, 144B2046,

<![if ! IE]>

<![endif]>112

XB 37M-1 1203

004U8415

144B2047, 144B2048

** Cover for code no. 004U8414 and 004U8415

90 80 80 110 90

1)Temperature control:TermostatT°C200 / Danfoss AVTB

Connections:

2)Temperature control:TermostatT°C200 / Samson 43-1

2 3

3)Temperature control: Danfoss ECL 110

1. District heating (DH) supply

25 90 80 80110 90

Options:

Code No.:

2. District heating (DH) return

Wall

3. Blow-off pipe from safety valve

Cover, w/door H1000 x B600 x D400

4. Domestic cold water (DCW)

<![if ! IE]>

<![endif]>52

2 3

For code No’s 004U6069, 004U6057,

004U8416

5. Circulation

<![if ! IE]>

<![endif]>400

004U6061, 144B2046, 144B2047, 144B2048

6. Domestic hot water (DHW)

Note:Two covers are available for WL.

Top view

Cover, w/door H1200 x B840 x D450

This drawing illustrates the smallest -

004U8417

width 600 and depth 400 mm.

600

For code No’s 004U8414 + 004U8415

DHW: CAPACITY EXAMPLES

Heat exchanger

Temperature

Capacity

Supply flow

Return flow

DHW

Tap load

Pressure loss

Primary flow

Type

control

[kW]

Primary [°C]

[°C]

[l/min]

Primary [bar]

[l/min]

XB 37M-1 60		135	60	18,4	10 / 45	55,3	0,55	2790
XB 37M-1 60	TC + AVTB	150	65	19,9	10 / 50	54,1	0,57	2860
XB 37M-1 70	TC + AVTB	160	60	18,4	10 / 45	65,5	0,68	3310
XB 37M-1 70		160	60	18,4	10 / 45	65,5	0,68	3310
XB 37M-1 70		175	65	19,8	10 / 50	62,7	0,69	3330
XB 37M-1 80	TC + Samson	185	60	18,4	10 / 45	75,8	0,57	3820
XB 37M-1 80	TC + Samson	200	65	19,8	10 / 50	71,7	0,56	3810
XB 37M-1 80		200	65	19,8	10 / 50	71,7	0,56	3810
XB 37M-1 60		135	60	18,4	10 / 45	55,3	0,34	2790
XB 37M-1 60		150	65	19,9	10 / 50	54,1	0,36	2860
XB 37M-1 80	ECL 110	185	60	18,4	10 / 45	75,8	0,37	3820
XB 37M-1 80	ECL 110	200	65	19,8	10 / 50	71,7	0,37	3810
XB 37M-1 80		200	65	19,8	10 / 50	71,7	0,37	3810
XB 37M-1 120		290	60	18,5	10 / 45	118,8	0,41	6010
XB 37M-1 120		300	65	19,6	10 / 50	107,5	0,36	5680

Danfoss Redan A/S · District Heating · Omega 7 · DK-8382 Hinnerup

Tel.: +45 87 43 89 43 · Fax: +45 87 43 89 44 · redan@danfoss.com · www.redan.danfoss.dk

VC.LA.S3.02