Adjustment Of The Floor Heating Flow Temperature; Limitation Of The Floor Heating Flow Temperature; Mode Of Operation Of The Control Unit; Technical Data / Materials - Watts FRG3020-F Notice De Montage Et D'utilisation

A
C
B
than 50 °C (120 °F). However, the data of the floor heating system can deviate and should be considered. The flow
temperature of the system is often lower than the adjustable maximum value of the thermostat. To avoid damages in
the floor structure caused by excess temperature, the flow temperature set value may be defined and limited on the
thermostatic head.
Therefore, it is most important to set the determined value and check it by means of thermometer during operation of
the floor heating system. If it is correct, place the blocking elements (Fig.7_B) right before and behind the pointer
(Fig.7_C).
Furthermore the temperature set value can be protected against inadvertent manipulation using the tamper-proof
cover (accessory: SE148GA).

7. MODE OF OPERATION OF THE CONTROL UNIT

The mixing valve is designed as a proportional controller and operates without auxiliary energy. The thermostat situ-
ated in the supply is in continuous contact with the flow temperature at all times.
Deviations from the target value result in an immediate change in valve stroke and, accordingly, a change in the
volume of the hot water injected from the boiler circuit.
The injected water volume is mixed with the return water from the manifold at the inlet to the circulation pump and, in
this way, keeps the flow temperature constant within a narrow temperature range.

8. TECHNICAL DATA / MATERIALS

Admissible ambient temperature range:
Admissible operating flow temperature range:
Maximum operating pressure:
Flow temperature setting range:
Rated heat output:
Power supply:
Fittings:
Pipes:
Plastic:
Gaskets:
O-Rings:
1) Please refer also to technical leaflets of the pump
2) The temperature set value can be protected against inadvertent manipulation using the tamper-proof cover (accessory: SE148GA)
MuB_10019872_FRG3020-F_(EN)
6.2.

ADJUSTMENT OF THE FLOOR HEATING FLOW TEMPERATURE

The flow temperature may be adjusted gradually between 20 to 70 °C (68 to 158
°F). The regulating hand wheel of the thermostat is supplied with a scale 1-7
(Fig.7_A). Please see the temperatures set on the scale in the table below:
1
20 °C
68 °F
Fig.7
6.3. L
IMITATION OF THE FLOOR HEATING FLOW TEMPERATURE
As a rule, the flow temperature in floor heating systems should not be higher
0...40 °C (32...104 °F)
0...80 °C (32...176 °F)
6 bar (87 psi)
20...70 °C (68...158 °F)
approx. 14 kW
230 VAC – 50 Hz
Brass Ms 58
Brass Ms 63 or stainless steel
Impact- and temperature resistant
AFM 34 or EPDM
EPDM
2 3
28 °C 37 °C 45 °C
82.4 °F 98.6 °F 113 °F
1)
1)
2)
Subject to technical modification
4 5 6
53 °C 62 °C
127.4 °F 143.6 °F
EN
7
70 °C
158 °F
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