Danfoss WT-C Installation guide

Danfoss
Brand
Danfoss
Model
WT-C
Category
Water heaters & boilers
Type
Installation guide

Danfoss WT-C is an advanced hot water heater that provides efficient and reliable water heating for various applications. With its durable copper construction and high-quality components, the WT-C ensures longevity and optimal performance.

The device features multiple connections for seamless integration with your existing plumbing system, including inlets and outlets for hot and cold water, as well as connections for an expansion vessel and a temperature sensor. The WT-C is also equipped with an immersion heater connection, allowing for additional heating if desired.

The WT-C is designed with safety in mind. It includes a built-in safety valve to release excess pressure and prevent damage to the unit. The overflow pipe must be connected to a visible drain to ensure proper discharge of excess water.

Danfoss WT-C is an advanced hot water heater that provides efficient and reliable water heating for various applications. With its durable copper construction and high-quality components, the WT-C ensures longevity and optimal performance.

The device features multiple connections for seamless integration with your existing plumbing system, including inlets and outlets for hot and cold water, as well as connections for an expansion vessel and a temperature sensor. The WT-C is also equipped with an immersion heater connection, allowing for additional heating if desired.

The WT-C is designed with safety in mind. It includes a built-in safety valve to release excess pressure and prevent damage to the unit. The overflow pipe must be connected to a visible drain to ensure proper discharge of excess water.

Installation Guide
WT-C 500
WT-C 750
© Danfoss A/S (Dept./Init.), 2017-10 VIBND302 1
2 VIBND302 © Danfoss A/S (Dept./Init.), 2017-10
Danfoss A/S is not liable or bound by warranty if these instructions are not adhered to during installation or service.
The English language is used for the original instructions. Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© Copyright Danfoss A/S
© Danfoss A/S (Dept./Init.), 2017-10 VIBND302 3
Installation
The hot water heater should stand on a solid surface and be levelled with assistance from the setscrews underneath the tank.
The tank models that come without setscrews can be levelled with assistance of a shim. This must be done before the tank is
connected to the pipes and lled with water. Connections not in use must be plugged appropriately. During water lling, con-
densed water may emerge on the outside of the tank. This will result in water underneath the tank, on the oor. This will cease
when the tank is heated. There must be a oor drain in the same room.
All connections (including those not used) must be insulated to minimize idle losses.
Commissioning
Start by lling the tank, then pressurize it. Continue to ll the radiator system (the enclosed water). The working pressure may
not exceed 3 bar (gauge), a safety valve with a releasing pressure of 3 bar must always be installed.
Maintenance
Check the safety valve annually by manually opening and closing the valve handle and making sure that water is released.
Check annually all connections for eventual leakage (also peripheral installations, i.e. a heat pump, etc.).
Technical data
WT-C 500 750
Corrosion protection, coil copper copper
Storage volume V litre 486 737
Volume, coil litre 4x3,5 6x3,5
Length, coil m 4x12 6x12
Max. pressure, hot water heater bar/MPa 3 3
Max. pressure, coil bar/MPa 10 10
Max. immersion heater length mm 670 850
Height (incl. feet) mm 1758 1831
Net weight kg 161 191
Immersion heater max. output kW 9 2x9
Standing loss S W 85,6 126,8
Energy eciency class C C
4 VIBND302 © Danfoss A/S (Dept./Init.), 2017-10
Electrical Installation
• The electrical installation must be performed by an authorized installer and follow applicable norms and regulations.
• When selecting electrical equipment, it must be selected with approved materials and enclosure class.
Pipe installation
The water heater must be supplied with:
• A safety valve
• A shut-o valve
• A drain valve
• A non-return valve
• A mixing valve
• A pressure gauge
• A vacuum valve as per applicable standards.
The water heater must be supplied with the prescribed safety equipment according to applicable local and national regulations.
The overow pipe from the safety valve must not be able to be shut-o and must run visibly above the oor drain.
Filling
Fill the water heater as follows:
1. Open a hot water tap in the system.
2. Open the shut-o valve on the incoming cold water. This valve should then be fully open during operation.
3. The hot water tap can only be shut o when the water heater is lled, which is when only water
comes out of the tap (initially an air-water mixture comes out of the tap).
© Danfoss A/S (Dept./Init.), 2017-10 VIBND302 5
Water temperature
Outgoing water temperature must not exceed applicable local and national regulations. At higher heater temperatures a mixer
valve can be installed to restrict the outgoing hot water temperatures according to country specic regulations. The lower the
temperature in the system, the less heat loss from lines and valves.
Safety valve
The safety valve must be inspected regularly.
Ease the safety valve lever slightly to release some water through the overow pipe. This must be carried out at least 4 times a year.
It is quite normal for the safety valve to let out small amounts of water when the water tank is being charged.
• If the valve does not work satisfactory, it must be replaced.
• If there is a risk of freezing, the water heater must be drained.
• In the event of malfunctions - contact the installer.
•
Disassembling the product
When disassembling the product, applicable laws and regulations must be observed. Contact your installer for more information.
6 VIBND302 © Danfoss A/S (Dept./Init.), 2017-10
1758
1710
1492
1217
1042
942
892
842
792
742
467
192
0
3
3
3
2
2
2
2
695
696
821
5
5
6
6
4
Dimensions
Technical data
WT-C 500
Storage volume V 486 litres
Test pressure 4,3 bar
Working pressure 3 bar
Rated temperature 100 °C
Weight 161 kg
Standing loss S 85,6 W
Energy eciency class C
Required ceiling height for tilting: min. 1850mm
WT-C 500
Height (mm) 1758
Dimensions (mm) 821 x 695
Connection WT-C 500
1 Expansion/Venting, DN25 ext.
2 Connections (8x), DN50 int.
3 Temperature sensor conn. DN20 int.
4 Immersion heater conn. DN50 int.
5 Hot water coil (2x12m), Ø22
6 Preheat coil/Hot water coil (2x12m), Ø22
1
© Danfoss A/S (Dept./Init.), 2017-10 VIBND302 7
Ø960
1831
1785
1515
965
765
490
215
0
2
2
2
2
4
5
5
6
6
3
3
3
1065
1240
815
865
915
Dimensions
Technical data
WT-C 750
Storage volume V 737 litres
Test pressure 4,3 bar
Working pressure 3 bar
Rated temperature 100 °C
Weight 191 kg
Standing loss S 126,8 W
Energy eciency class C
Required ceiling height for tilting: min. 2085mm
WT-C 750
Height (mm) 1831
Diameter (ømm) 960
Connection WT-C 750
1 Expansion/Venting, DN25 ext.
2 Connections (8x), DN50 int.
3 Temperature sensor conn. DN20 int.
4 Immersion heater conn. DN50 int.
5 Hot water coil (3x12m), Ø22
6 Preheat coil/Hot water coil (3x12m), Ø22
1
Ø780
1073
8 VIBND302 © Danfoss A/S (Dept./Init.), 2017-10
Danfoss Heat Pumps
Box 950
SE-671 29 ARVIKA
Phone +46 570 81300
E-mail: dhpinfo@danfoss.com
Internet: www.heating.danfoss.com, www.thermia.com
Danfoss assumes no responsibility whatsoever for any errors occurring in catalogues, brochures or other printed material. Danfoss
reserves the right to make changes to (the design of) its products with no prior warning. The same applies to products already on order
provided that the previously agreed specications remain unchanged. All trademarks in this material are the property of the respective
company. Danfoss and the Danfoss logotype are trademarks which belong to Danfoss A/S. All rights reserved.
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Danfoss WT-C Installation guide

Danfoss
Brand
Danfoss
Model
WT-C
Category
Water heaters & boilers
Type
Installation guide

Danfoss WT-C is an advanced hot water heater that provides efficient and reliable water heating for various applications. With its durable copper construction and high-quality components, the WT-C ensures longevity and optimal performance.

The device features multiple connections for seamless integration with your existing plumbing system, including inlets and outlets for hot and cold water, as well as connections for an expansion vessel and a temperature sensor. The WT-C is also equipped with an immersion heater connection, allowing for additional heating if desired.

The WT-C is designed with safety in mind. It includes a built-in safety valve to release excess pressure and prevent damage to the unit. The overflow pipe must be connected to a visible drain to ensure proper discharge of excess water.

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