Electric Connection; Fuse Change - Moehlenhoff B 50302 Mode D'emploi

5 Installation
1
2b 2b
1. Take off the cover.
2. Install the base. In case of wall mounting, fi x the base to the wall with 2 screws
Ø 4 mm and corresponding dowels according to the quality of the wall. In case
of installation on a mounting bracket, use a bracket TS 35/7.5.
3. Make the electric connection.
4. Install the cover.
5.1 Select and insert the fuse (only B 50302)
1 2
24 V
T2A
230 V
T4AH
5.2 Parametrization
The control direction is set with jumper 1:
NO
NO operation: Jumper 1 = ON
NC operation: Jumper 1 = OFF
0min 5min
The fi xed follow-up time of 2 minutes of the pump or the
boiler can be increased by further 5, 10 or 15 minutes
2 3 2 3
using jumper 2 and 3:
NC
10min 15min
2 3 2 3
10 minutes
15 minutes
6

Electric connection

The voltage supply of the 24 V version must come from a safety transformer according to EN 61558-2-6 or, for North America, from a Class II Transformer
according to UL.
For the connection of the voltage supply, the cable sections must be 0.75 mm² - 1.5 mm² for 24 V or 1.5 mm² for 230 V. Depending on the voltage version of the base, it
is possible to take L1 or L and L2 or N, as well as the protective conductor, from the base. A temperature limiter/dew point sensor can be connected to the contact TB/%H
in NC operation; this contact cannot be used in NO operation. If no temperature limiter is connected, the connection TB/%H must be bridged (provided for at the factory).
The bridge must be removed as soon as a temperature limiter is connected. The temperature limiter must be a normally closed contact.
The wiring of the ther-
mostats depends on the
present basis. For wiring
purposes, please observe
the instructions of the ther-
mostat or of the respective
component.
Digital controller
Analogous thermostat
Actuator
Boiler
Pump
~
Voltage source
Temperature limiter
System clock
Heating/cooling change-over
CO
Cooling
Heating
These instructions are protected by copyright. All rights reserved. It may not be copied, reproduced,
abbreviated or transmitted, neither in whole nor in parts, in any form, neither mechanically nor elec-
tronically, without the previous consent of the manufacturer.
4
2a
3
Depending on the fuse inserted
(included in the scope of deliv-
ery) the B 50302 can be oper-
ated at 24 V or 230 V voltage
sources.
The voltage used must
be marked on the iden-
tifi cation plate.
Time Jumper 2
0 min OFF
5 min OFF
ON
ON
24 V
L
N
7 LED signalling (only B 40x02, B 20x02)
Function
Pump/boiler
Mains voltage
Fuse
Change over
Heating zones
1 to x
8 Maintenance

8.1 Fuse change

WARNING Electrical voltage! Danger to life!
• Always disconnect the base from the mains network and secure against
unintended activation before opening.
• Disconnect external voltages and secure against unintended activation.
1
8.2 Cleaning
Only use a dry and solvent-free, soft cloth for cleaning.
9 Dismantling
WARNING!Electrical voltage! Danger to life!
• Always disconnect the base from the mains network and secure against
unintended activation before opening.
• Disconnect external voltages and secure against unintended activation.
Jumper 3
• De-energise the complete installation.
OFF
ON
• Remove the wiring to all externally connected components.
OFF
• Remove the base and dispose it of properly, if necessary.
ON
Mo Tu
0 6
~
%H
Colour Explanation
Green On: Pump/boiler active
Off: Pump/boiler inactive
Flashing: Temperature limiter/dew point sensor active
Green On: Device in operation
Off: Device not in operation
Flashing: Valve protection function active (Option)
Red On: Fuse defective
Blue On: Cooling mode active
Off: Heating mode active
Green On: Heating zone active
Off: Heating zone off
2
24 V
T2A
230 V
T4AH
We Th Fr Sa Su
12 18 24
CO
N
L
3
Cable bridge in
the parametrizati-
on NO operation
for all unused
thermostat con-
nections.