Commissioning
5
RC35 programming unit - Technical specifications are subject to change without prior notice.
21
5.6 Shut-down / switching off
The RC35 programming unit is supplied with power via the heating system and is perma-
nently switched on. It is only switched off if the heating system is switched off, such as for
maintenance purposes.
z To switch the heating system on or off: set the ON/OFF switch on the boiler to position
1 (ON) or 0 (OFF).
5.7 Operating tips
Devices on the EMS bus
In a bus system, only one device can carry out the calculations for a heating circuit.
Therefore only one RC35 can be installed in a heating system. If additional room control-
lers are required (such as the RC20), they must be installed as remote control units
1
with
a set heating circuit address (page 26).
Thermostatic radiator valves in the reference room
Thermostatic valves on radiators in the reference room
2
are not required for room temper-
ature control. If there are thermostatic radiator valves in the reference room, they must be
fully open.
Pump anti-seize
3
In all operating modes, all heating circuit pumps are switched on for 10 seconds every
Wednesday at 12 noon to prevent pump damage. The mixers are then set to "OPEN" for
10 seconds. After 10 seconds, all pumps and mixers then return to their normal, regulated
operation.
After switching the unit off or in the event of a power failure, the date and time
are retained for up to 8 hours. All other settings are retained permanently.
1) This function is not available for boilers with DBA.
2) Room in which an RC35 or RC20/RC20RF is installed
3) This function is not available with boilers with UBA1.x and DBA.
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