Data Sheet
FHM-CNx series
Pre-assembled Mixing Shunts
Application
FHM-CN1 (without bypass) FHM-CN2 (with bypass)
Ordering
Accessories
The Danfoss FHM-CNx series pre-assembled
mixing shunts are used for regulation of flow and
supply temperature in hydronic floor heating
systems with individual gas boiler (household).
The compact, flexible design allows mounting
the mixing shunts directly to the manifold on
right side, with the primary connection from the
side or below by bends (088U0821) which can be
ordered separately.
A self-acting proportional regulator (type FTC +
RA-C control valve) is used to regulate the supply
Product Pump type
FHM -CN1 Grundfos UPSO 15-60 - 35 - 70° C 088U0681
FHM-CN2
1)
Recommended for use without wiring center.
2)
Setting range (0.05~0.5 bar).
Product Type Code no.
1)
Grundfos UPSO 15-60 AVDO DN15
temperature. The regulator ensures that the
desired supply temperature to the underfloor
heating system always remains constant.
The FHM-CN mixing shunt scan be mounted
directly to the Danfoss manifold system without
the use of special equipment.
By using Danfoss floor heating controls all expectations of a professional floor heating system are
fullfilled.
Bypass control
valve
2)
Temperature
setting range
35 - 70° C 088U0682
Code no.
VDIKD302
Bend ¾”, 1x FHM-CB 088U0821
Safety thermostat FH-ST55 088U0301
© Danfoss | FHH | 2016.10 | 1
Data Sheet FHM-CNx series Pre-assembled Mixing Shunts
Technical specifications
Materials
Capacity
Primary connection ¾” internal thread
Max. differential pressure 0.6 bar
Max. working pressure PN10
Max. flow temperature (primary side) 90 °C
Body, unions and other metal parts Brass
O-rings EPDM
Heat capacity
[kW]
24 70/40 50/40 12.6
28 80/40 50/40 9.6
* based on kv (Xp = 4K) with FTC
T
/T
supply
at primary side
return
[°C]
T
at secondary side
supply
/T
[°C]
return
∆P at RA-C DN20*
[kPa]
FH-ST55
Safety Thermostat
230V / 16A
TS 55°C
Electrical connection
The FH-ST safety thermostat is fixed on the supply pipe and protects floor and system against
too high temperatures, especially important for
wooden floors. The FH-ST thermostat switches off
the power supply of the floor heating base unit,
when the temperature reaches 55° C.
By switching off the power supply of the floor
heating base unit, the actuators (NC) will close
Code no. 088U0301
Shut-off temperature 55° C
Switch difference 4 K
Classification IP 40 (mounted)
automatically and the floor heating system is
protected.
The FH-ST55 can also be connected to a pump or
a zone valve.
Note! The electrical installation must be carried out
by an authorized installer only (230 V DC).
2 | © Danfoss | FHH | 2016.10
VDIKD302
Data Sheet FHM-CNx series Pre-assembled Mixing Shunts
H [m]
Q [m
/h]
System
FHM- CN1
FHM- CN2
Pump curve
7
6
5
4
3
2
1
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
2
VDIKD302
© Danfoss Danfoss | FHH | 2016109 | 3
Dimensions
ISO228/
121
252
G1 ISO228/1
G¾
1
G¾ ISO228/1
G¾ ISO228/1
119
G¾
ISO228/1
223
213
G1 ISO228/1
25
78
FHM- CN1
G1 ISO228/1
213
G1 ISO228/1
25
78
FHM-CN1 with bend
306
50
23
121223
306
50
23
96
213
150 80 68 120
51.5
292
FHM- CN2
Danfoss A/S
Floor Heating Hydronics • Ulvehavevej 61 • DK-7100 Vejle • Denmark
Phone: +45 7488 8500 • Fax: +45 7488 8501
heating@danfoss.com • www.floorheating.danfoss.com
Danfoss ca n accept no respons ibility for pos sible errors in ca talogues, bro chures and other pr inted material. Da nfoss reserve s the right to alter its p roducts with out notice. This als o applies to produ cts
already o n order provided t hat such alteratio ns can be made with out subsequenti al changes being n ecessary in sp ecifications alr eady agreed.
All trade marks in this mate rial are proper ty of the respec tive companies . Danfoss and the Danf oss logotyp e are trademark s of Danfoss A/S. Al l rights reserv ed.
4 | © Danfoss | Danfoss | FHH | 2016.10
VDIKD302
Loading...