Danfoss WL Fact sheet

Fact Sheet

Instantaneous water heater for large apartment houses or large properties

FEATURES AND BENEFITS

• Instantaneous water heater with highly ecient 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-o 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 dierential pressure controller in fron of the water heater, if the dierential 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-lacquered steel sheet cover with door.

Domestic hot water (DHW)

The domestic hot water is prepared in a high-performance heat exchanger based on the ow 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 tted 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 tted as standard on the circulation pipe so that the pump ow 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 ow on the secondary side. Hot water installations with DHW circulation ensures tapping of hot water without any delay, – ensuring the best possible eciency 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.

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CIRCUIT DIAGRAM – EXAMPLE WITH DANFOSS ECL CONTROLLER

Note:

It is recommended to inst all a dierential pressure controller in front of water heater, if the dierential pressure fr om the district heating plant exce eds 0,8 bar, to avoid cycli c circulation.

DH Supply

DH Return

DH = G 1“ (ext. thread) DCW, DHW = /“ (int. thread) Circ. = ¾“ (int. thread)

Design specications

Nominal pressure (prim/sec.): PN 16 / PN 10 Max. supply temperature: 120 ºC Min. P: See capacity examples Chloride compounds: Max. 300 mg/l

Weight incl. cover: Max. 80.0 kg (incl. packing)

Cover: White-lacquered steel sheet

Dimensions (mm)

Without cover: H 1017 × W max. 580 × D 320 With cover: H 1000 × W 600 × D 400 mm* H 1200 x W 840 x D 450 mm**

* Cover for code no’s 004U6069, 004U6057, 004U6061, 144B2046, 144B2047, 144B2048 ** Cover for code no. 004U8414 and 004U8415

Connections:

1. District heating (DH) supply

2. District heating (DH) return

3. Blow-o pipe from safety valve

4. Domestic cold water (DCW)

5. Circulation

6. Domestic hot water (DHW)

Note: Two covers are available for WL.

This drawing illustrates the smallest -

width 600 and depth 400 mm.

2. Plate heat exchanger

6. Non-return valve 6a. Non-return valve

7. Ball valve

9. Circulation pump A

12. Safety valve

13. Thermometer

20. Balancing valve

25. Controller Danfoss ECL 110*

28. Sensor

31. Actuator

500

600

270

DHW

DCW

Circ.

Code No’s:

WL with HEX type: Cover: Code No.:

XB 37M-1 60 XB 37M-1 70 XB 37M-1 80

905

XB 37M-1 60 XB 37M-1 70 XB 37M-1 80 XB 37M-1 100

112

90 80 80 110 90

1 2 3 4 5

25 80 8011090

Wall

XB 37M-1 120

1) Temperature control: Termostat T°C200 / Danfoss AVTB

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

3) Temperature control: Danfoss ECL 110

Options: Code No.:

32. Valve** *) Can be ordered with Danfoss ECL 310

as replacement for ECL 110 at an additional charge **) Alternatively with self-acting thermostat(s)

Without

004B6069 004B6057 004B6061

144B2046 144B2047 144B2048 004U8414 004U8415

Cover, w/door H1000 x B600 x D400

54321

400

Top view

600

For code No’s 004U6069, 004U6057, 004U6061, 144B2046, 144B2047, 144B2048

Cover, w/door H1200 x B840 x D450

For code No’s 004U8414 + 004U8415

004U8416

004U8417

DHW: CAPACITY EXAMPLES

Heat exchanger

Typ e

XB 37M-1 60 XB 37M-1 60 150 65 19,9 10 / 50 54,1 0,57 2860 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 XB 37M-1 80 200 65 19,8 10 / 50 71,7 0,56 3810 XB 37M-1 60 XB 37M-1 60 150 65 19,9 10 / 50 54,1 0,36 2860 XB 37M-1 80 185 60 18,4 10 / 45 75,8 0,37 3820

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

Temperature

control

TC + AVTB

TC + Samson

ECL 110

Capacity

[kW]

Supply flow Primary [°C]

Return flow Primary [°C]

DHW

[°C]

Tap lo ad

[l/min]

Pressure loss Primary [bar]

Primary flow

135 60 18,4 10 / 45 55,3 0,55 2790

185 60 18,4 10 / 45 75,8 0,57 3820

135 60 18,4 10 / 45 55,3 0,34 2790

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

[l/min]

VC.LA.S3.02