Details, Symbols And Abbreviations; Safety Instructions; Design; Installation And Electrical Connection - Watts FRG3020-F Notice De Montage Et D'utilisation

2. DETAILS, SYMBOLS AND ABBREVIATIONS

For better understanding in this document references are used in the form of symbols and abbreviations, which are
described below:

Reference to resuming documents.
Important information and application hints
Safety instructions or important note to the function.
Shut-off: no flow
Open: flow with indication of flow direction
AG male thread
EUKO male thread with euro cone
FBH floor heating
FH radiant heating (generally)
FH/K radiant heating/cooling
FK radiant cooling
FRG floor heating control unit

3. SAFETY INSTRUCTIONS

WARNING: Always disconnect the power supply prior to performing any installation or connec-
tion operations!
All installation and wiring work at the unit must be carried out only in an idle condition.
The appliance may be connected and put to operation by qualified personnel only. Make sure to adhere
to valid safety regulations, in particular to VDE 0100 (German standard governing power installations
with nominal voltages ≤ 1000 VAC).
The control units are neither splash- nor drip-proof. Therefore, they must be mounted in a dry place.

4. DESIGN

1: Floor heating/cooling supply (1" UM)
2: Floor heating/cooling return (1" UM)
3: Primary supply (1" AG)
4: Primary return (1" AG)
5: Circulation pump
6: Thermostatic head
7: 3-way-mixing valve
8: Check valve (RV)
9: Supply temperature thermometer
10: Temperature limiter (optional)
11: Z-type fitting with immersion sleeve for supply temperature sensor.

5. INSTALLATION AND ELECTRICAL CONNECTION

5.1. M
OUNTING OF THE CONTROL UNIT
The unit is dedicated for flat sealing connecting to a manifold with 1" male thread and distance between supply and
return branch of 210 mm.
Please pay attention not to damage or break the cables of the pump and temperature limiter as well as the capillary
pipe of the thermostatic heads remote sensor while assembling. The cables must be installed without tension.
The correct installation of supply and return has to be ensured (Fig.2 and Fig.3.1 – 3.4).
MuB_10019872_FRG3020-F_(EN)
HK heating control unit
HKM heating control unit with mixing valve
HKV manifold
IG female thread
MuB installation leaflet
RV check valve
KFE fill and drain cock
Subject to technical modification
SKB gravity flow stop
TB temperature limiter
UM union nut
UWP circulation pump
WDS heating insulation box
WE boiler / heat generator
WP heat pump
ca. 270 mm
10
5
6
7
3
EN
9
11
1
8
2
4
Fig.2
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