Danfoss Shunt FHM-DK1 Installation guide

Brand: Danfoss

Model: Shunt FHM-DK1

Type: Installation guide

InstructIon

Shunt FHM-DK1/ -DK2

VI.UL.B1.02 Produced by Danfoss Floor Heating Hydronics · 08.2005

Instruction Shunt FHM-DK1/-K2

Design: The shunt is delivered assembled and can be

mounted directly on the manifold. As standard,

the shunt is delivered for left-side mounting.

However, it can be reversed.

Connection for ow and return ow is marked

with arrows on the shunt. Connection from below

(standard), from the side or from the top.

We recommend that, especially in connection

with district heating substations for direct heat-

ing, a dirt collector be mounted before the shunt

together with a possible dierential pressure

controller, (e.g. Danfoss AVPL).

Wiring diagram: All electric connections must be performed by

authorised personnel according to current rules

and regulations.

The Danfoss AT thermostat is a safety thermostat

for the protection of e.g. wooden oors against

NB: Cut o the power supply before opening/

setting the AT thermostat!

To set the AT thermostat, loosen the two screws

and lift o the housing.

In the top haIf, you will nd a temperature selec-

tor (see arrow), and the temperature scale is

marked on the base plate. Change the tempera-

ture by turning the selector.

The shut-down temperature should be 5-10 °C

over the operational temperature for the shunt.

This, however, depends on the ooring and pip-

ing. The recommended maximum temperature

of the supplier must be observed.

Screw the house back on when you have com-

pleted the setting.

Setting the AT

safety thermostat

(only FHM-DK1):

To check the temperature setting, e.g. on service

visits, remove the dark grey cover.

Example of system:

high temperatures. In the event of over tempera-

ture, the AT thermostat cuts o the oor-heating

control so as to close the thermal actuators.

If no controls are connected, the AT thermostat

will shut down e.g. the boiler or pump.

FHM-DK1

FHM-DK2

VI.UL.B1.02 Produced by Danfoss Floor Heating Hydronics · 08.2005

Instruction Shunt FHM-DK1/-DK2

Capacities for RA-C valve:

Presetting of

RA-C valve:

The calculated settings values can be chosen easily,

precisely and without the use of special tools.

- Remove the protective cap or the sensor unit.

- Lift the setting ring.

- Turn the setting ring clockwise until the preferred

scale value is against the reference point.

- Let go of the setting ring and check the setting.

Presetting

area

RA-C valve: The RA-C valve is placed on the return outlet for

the heat supply and is adjustable to the preferred

ow quantity that is to be fed to the shunt.

If there is more than one building, the maximum

available capacity is thus ensured. Furthermore,

the correct presetting will limit noise in the heat-

ing system.

The possible presetting values are:

1, 2, 3 and N. If you chose “N”, the valve will be

fully open (factory setting). Setting within the

hatched areas on the drawing should be avoided.

Once the sensor has been mounted, the presetting

is locked and thus secured against any changes.

VI.UL.B1.02 Produced by Danfoss Floor Heating Hydronics · 08.2005

Instruction Shunt FHM-DK1/-K2

The preferred general ow in the shunt is preset

with the MSV-C valve. This valve moreover en-

ables documentation of ow and pressure loss.

MSV-C

(only FHM-DK1):

The shunt is equipped with a Grundfos Alpha+

pump for automatic variable speed, which

ensures constant pressure over the oor-heating

circuits and thus reduces power consumption.

Pump setting: The pump can be set as described in the instruc-

tions enclosed with the pump.

Dimensioned sketch:

FTC:

The FTC must be set to the preferred temperature in

the shunt, which is typically 30 °C – 40 °C depending

on the oor construction, insulation and ooring.

The maximum and minimum settings can be

limited as shown below:

Se enclosed instruction for the setting/use of the

MSV-C valve.

Danfoss Shunt FHM-DK1 Installation guide

Danfoss Shunt FHM-DK1 Installation guide

Danfoss Shunt FHM-DK1 Installation guide

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