Danfoss Shunt FHM-DK1 Installation Guide

Danfoss Shunt FHM-DK1 Installation Guide
Shunt FHM-DK1/ -DK2
Instruction
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 flow and return flow 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 heating, a dirt collector be mounted before the shunt
together with a possible differential pressure
controller, (e.g. Danfoss AVPL).
FHM-DK1
FHM-DK2
Example of system:
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 floors against
Setting the AT
safety thermostat
(only FHM-DK1):
NB: Cut off the power supply before opening/
setting the AT thermostat!
To set the AT thermostat, loosen the two screws
and lift off the housing.
In the top haIf, you will find a temperature selector (see arrow), and the temperature scale is
marked on the base plate. Change the temperature 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 flooring and piping. The recommended maximum temperature
of the supplier must be observed.
Screw the house back on when you have completed the setting.
VI.UL.B1.02
high temperatures. In the event of over temperature, the AT thermostat cuts off the floor-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.
To check the temperature setting, e.g. on service
visits, remove the dark grey cover.
Produced by Danfoss Floor Heating Hydronics · 08.2005
Instruction
Shunt FHM-DK1/-DK2
RA-C valve:
The RA-C valve is placed on the return outlet for
the heat supply and is adjustable to the preferred
flow 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 heating system.
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.
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.
Presetting
area
Capacities for RA-C valve:
VI.UL.B1.02
Produced by Danfoss Floor Heating Hydronics · 08.2005
Instruction
Shunt FHM-DK1/-K2
FTC:
The FTC must be set to the preferred temperature in
the shunt, which is typically 30 °C – 40 °C depending
on the floor construction, insulation and flooring.
The maximum and minimum settings can be
limited as shown below:
MSV-C
(only FHM-DK1):
The preferred general flow in the shunt is preset
with the MSV-C valve. This valve moreover enables documentation of flow and pressure loss.
Se enclosed instruction for the setting/use of the
MSV-C valve.
Pump setting:
The shunt is equipped with a Grundfos Alpha+
pump for automatic variable speed, which
ensures constant pressure over the floor-heating
circuits and thus reduces power consumption.
The pump can be set as described in the instructions enclosed with the pump.
Dimensioned sketch:
VI.UL.B1.02
Produced by Danfoss Floor Heating Hydronics · 08.2005
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