Danfoss FHM-C5, FHM-C6 Data sheet

Data Sheet

FHM-C5, FHM-C6

Mixing Shunts for Floor Heating

Application

Mixing shunt FHM-C5 and FHM-C6

The Danfoss compact mixing shunts are used
for regulation of flow and supply temperature in
hydronic floor heating systems.

The compact, flexible design allows mounting the
mixing shunt directly to the manifold on both left
and right side, with the primary pipe connection
from the side or below.

A self-acting proportional regulator is used to
regulate the supply temperature. The regulator
ensures that the desired supply temperature to
the underfloor heating system always remains
constant.

A built-in check valve ensures correct flow direction.

An air-vent on top and a thermometer completes
the mixing shunt. An optional thermostat protects
the floor against too high temperatures.

FHM-C5 and FHM-C6 have a standard 3-speed
pump (UPS).

FHM-C5 and FHM-C6 compact mixing shunts can
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.

Should water treatment be used it is essential that
dosing instructions of the manufacturer are strictly
observed. It is recommended that formulations
containing mineral oil are avoided.

Ordering

Accessories

Product

FHM-C5 4,5 kW 9 kW UPS 15-40 088U0093

FHM-C6 7 kW 13 kW UPS 15-60 088U0096

1)

Max. effect at Δt = 30K in primary (70/40) and Δt = 5K (10K) in secondary line with heatloss 50 W/m².

Product Type Code no.

Thermometer 0 °C to 60 °C, Ø 35 mm FHD-T 088U0029

Safety thermostat FH-ST55 088U0301

Temperature controller, 15 °C to 50 °C FTC 013G5081

Measuring set for needles FHM-MS 088U0304

Angle fittings (set of 2 pcs.) FHM-AF 088U0305

Max. effect at

sec. Δt = 5K

Max. effect at

sec. Δt = 10K

1)

Pump type,

Grundfos

Code no.

© Danfoss | FEC | 2020.06

AI304357196452en-000101 | 1

Data Sheet FHM-C5, FHM-C6 Mixing Shunts for Floor Heating

Technical specifications

FH-ST55
Safety thermostat

Supply voltage 230 V AC

Primary connection ½”

Max. differential pressure with Danfoss Floor
Heating manifolds

0,6 bar

Max. working pressure PN10

Max. flow temperature 90 °C

FTC flow temperature control 18 °C to 50 °C

FH-DT supply flow thermometer 0 °C to 60 °C

Integrated check valve POM / Stainless steel

Body, unions and other metal parts Brass / Stainless steel

O-rings and seals EPDM

Weight approx. 3,5 kg to 4 kg (depending on model)

230V / 16A

T

55°C

S

Electrical connection

The FH-ST safety thermostat is fixed on the tube
and protects floor and system against too high
temperatures, especially important for wooden
floors. The FH-ST thermostat switches off the pow-

By switching off the power supply of the floor
heating base unit, the actuators (NC) will close
automatically and the floor heating system is pro-

tected.
er supply of the floor heating base unit, when the
temperature reaches 55 °C.

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).

Code no. 088U0301

Shut-off temperature 55 °C

Switch difference 4 K

Classification IP 40 (mounted)

2 | © Danfoss | FEC | 2020.06

AI304357196452en-000101