Danfoss Air Heating Surfaces Installation guide
MAKING MODERN LIVING POSSIBLE
Installation Guide
Danfoss Air Heating Surfaces
www.heating.danfoss.com
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)
© 2012 Copyright Danfoss A/S
50 cm 50 cm
230V, 50 Hz
A
B
C
D
EF
G
H
I
J
K
Installation Guide Danfoss Air Heating Surfaces
Table of Contents
1 Electrical Heating Surfaces .......................................................... 3
1.1 Electrical pre-heating surfaces ..................................................... 3
1.2 Electrical after heating surfaces .................................................... 4
1.3 Placing an electrical heating surface ................................................. 4
1.4 Connecting an electrical heating surface .............................................. 4
1.5 Overview - System with one heating surface ............................................ 5
1.6 Overview - System with two heating surfaces ........................................... 6
1.7 Troubleshooting .............................................................. 7
2 Waterborne Heating Surfaces ........................................................ 7
2.1 Waterborne after heating surfaces .................................................. 7
2.2 Placing a waterborne heating surface ................................................ 8
2.3 Connecting a waterborne heating surface ............................................. 8
2.4 Call for Heating .............................................................. 9
2.5 Troubleshooting .............................................................. 10
3 Geothermal Heating Surfaces ........................................................ 11
3.1 Geothermal heating surfaces ...................................................... 11
3.2 Dimensioning of ground collectors .................................................. 11
3.3 Laying ground collectors ........................................................ 12
3.4 Filling with brine .............................................................. 12
3.5 Placing a geothermal heating surface ................................................ 13
3.6 Connecting a geothermal heating surface ............................................. 13
3.7 Troubleshooting .............................................................. 14
4 Technical Data .................................................................. 15
4.1 Electrical heating surfaces ........................................................ 15
4.2 Waterborne heating surfaces ...................................................... 16
4.3 Geothermal heating surfaces ...................................................... 17
1 Electrical Heating Surfaces
1.1 Electrical pre-heating surfaces
An electrical pre-heating surface is used to keep the Air system temperature above the freezing point.
Air systems without pre-heating will gradually reduce the air intake volume during long term operation at outside temperatures below
-3°C in order to prevent freezing. In a standard house this is an excellent solution, but in airtight buildings (typical low-energy constructions), the imbalance can cause a non-desirable negative pressure inside the house. Installing a pre-heating surface is therefore recommended here.
The electrical pre-heating surface is built into the duct system on the outdoor air side.
Extract air.
A:
B: Supply air.
C: Outdoor air.
D: Exhaust air.
E: Sensor before heating surface.
F: Sensor after heating surface.
G: Supply cable to heating surface
H: Supply cable to automatic function.
I: Communication cable HRV unit -> external controller.
J: Post-heating (to be insulated with 50 mm glass/mineral wool).
K: External controller (must not be insulated).
Note! The electrical heating surface must be installed by a certified electrician.
Danfoss Heating Solutions VIFKB502
3
50 cm
50 cm
230V, 50 Hz
A
B
C
D
E
F
G
H
I
J
K
min. 2 x A mm
A mm
min. 2 x A mm
45 mm
Rubber sleeve
Insulation
PT-1000 sensor
Installation Guide
Danfoss Air Heating Surfaces
1.2 Electrical after heating surfaces
An electrical after heating surface is used to slightly raise the supply air temperature to prevent discomfort in the room.
The electrical after heating surface is built into the duct system on the supply side.
A: Extract air.
B: Supply air.
C: Outdoor air.
D: Exhaust air.
E: Sensor before heating surface.
F: Sensor after heating surface.
G: Supply cable to heating surface
H: Supply cable to automatic function.
I: Communication cable HRV unit -> external controller.
J: Post-heating (to be insulated with 50 mm glass/mineral wool).
K: External controller (must not be insulated).
Note! The electrical heating surface must be installed by a certified electrician.
1.3 Placing an electrical heating surface
The heating surface must be placed at a minimum distance of 2 x the diameter of the duct size to the nearest obstacle (pipe bends,
external filters or unit).
An arrow on the heating surface indicates the air flow direction.
The heating surface must be placed at least 30 mm from any wooden building components.
The connection box should face upwards or horizontally - never downwards.
The heating surface must be insulated with non-flammable insulating material. The cover of the surface’s external controller must NOT
be insulated, but must remain visible so that the manual over-heating protection can be deactivated if this is triggered unexpectedly.
The two factory mounted PT-1000 sensors must be placed in the duct system 50 cm in front of and 50 cm behind the surface. Each
sensor is marked if it should be placed before or after surface. If the sensors face the wrong way, the required operations cannot be
achieved.
Drill Ø8 mm holes in the duct and install the supplied rubber grommets, then place the sensors into the duct. Fix the sensors to the pipe
with duct tape and insulate together with the rest of the duct system and heating surface.
1.4
Connecting an electrical heating surface
The mains lead from the supplied external controller (marked “supply voltage 230 V, 50 Hz”) is connected to the mains power, using a
suitable junction box. We recommend that the heating surfaces be supplied from a separate group.
The power cable from the external controller (marked “to heating surface”) is connected to the electrical heating surface, cf. electrical
diagram.
The supply cable for the heating surface is fed through the pre-punched holes in the heating surface junction box. A cable gland must
be used to provide strain relief.
The communication cable is mounted between the external controller and the ventilation system’s serial input (also see the following
pages).
4
VIFKB502 Danfoss Heating Solutions
Solid state relæ
3 4 5 6
Gråt modbus stik, set
fra tilslutningsside
2021
N L PE
+
-
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1
24 26
N
L1
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Klemme 1: Orange
Klemme 2: Blå (+modstand)
Klemme 3: Hvid/blå (+modstand)
Klemme 4: Tom
OBS:
120 Ohms modstand
mellem klemme 2 & 3
1
2
3
4
5
6
New
device
found
Installation Guide Danfoss Air Heating Surfaces
1. PT 1000 sensor, behind surface (control sensor).
2. PT 1000 sensor in front of the surface.
3. Communication cable between the HRV unit and mounting
case (10 m, twisted pair, 2 pairs + display).
4. The power cable, 230 V, 50 Hz, should be connected to a separate 10 A group (3 m, 3G1.5).
5. Heating surface connection (3 m 3G1.5).
6. Over-heating thermostat with automatic re-closure (70°C).
7. The over-heating thermostat with manual closure (120°C).
8. Element.
Note! The control box must not be insulated.
1.5 Overview - System with one heating surface
1. Unit.
2. Heating surface controller.
3. CCM module.
4. Air Dial.
5. Serial cable, heating surface controller / unit.
6. Serial cable, CCM module / unit.
Mounting sequence - carried out on the serial socket in the unit
Twist together in pairs the serial
1.
cables with same colour.
2. Crimp-on ferrules are recom-
mended.
3. Insert the cable pairs into the
unit connector.
4. 1. White / Orange
2. Orange
3. Black
4. White / Blue
5. Blue
6. Remove jumper between terminals 5 and 6
5. Insert the connector into the
unit. Within four minutes the Air
Dial will recognise the connected heating surface and automatically register it with the system.
Danfoss Heating Solutions VIFKB502
5
1
2
3
4
5
6
New
device
found
Installation Guide Danfoss Air Heating Surfaces
1.6 Overview - System with two heating surfaces
1. Unit.
2. Heating surface 1 controller, without termination resistance.
3. Heating surface 2 controller, with termination resistance
4. CCM module.
5. Air Dial.
6. Serial cable, CCM module / unit.
7. Serial cable, controller 1 / unit.
8. Serial cable, controller 2 / controller 1.
Mounting sequence
Heating surface external con-
1.
troller 1 is mounted as shown in
chapter 1.5.
Remove the termination resistance T on heating surface 1.
2. Connect surface 1 to surface 2:
1. Orange / Orange
2. Blue / Blue
3. White-Blue / White-Blue
4. Empty
3. 1. White / Orange
2. Orange
3. Black
4. White / Blue
5. Blue
6. Remove jumper between terminals 5 and 6
4. Insert the connector into the
unit. Within four minutes the Air
Dial will recognise the connected heating surface and automatically register it with the system.
6
VIFKB502 Danfoss Heating Solutions
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