REMEHA W40 Installation And Maintenance Instructions Manual page 25

8. ELECTRICAL INSTALLATION
8.1 General
The remeha W40/60-m ECO is equipped with electronic
control and safety equipment, and flame ionisation
control. A microprocessor is at the heart of the remeha
W40/60-m ECO.
The boiler is pre-wired as shown in the wiring diagram in
para. 8.10. All controls on the boiler are 24V.
8.2 Electrical supply
The remeha W40/60-m ECO must have a permanent
240V-50Hz single phase supply.
8.3 Connection to the control system
8.3.1 Modulating control
Using a modulating control, the modulating character of
the boiler is used to the optimum level. The control
continuously demands a flow temperature from the
boiler, on the basis of the room and/or outdoor
temperature, and the boiler then modulates at this
temperature.
As a result, the number of operating hours increases
and the number of start-ups is drastically reduced. In
combination with the gas/air ratio control, on balance
this means a higher yield and lower maintenance costs.
Two types of modulating controls can be connected:
1. Modulating weather-compensated boiler control.
2. Modulating room control.
The communication between the modulating control and
the protection system is always via an interface PCB.
The appliance is equipped as standard with an interface
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for one of the rematic
ted controls: SR 5240 C1, 2945 C1 UMU and 2945 C1
MUMU.
When using a modulating room control (Honeywell
Chronotherm Modulation), the interface must be
exchanged.
modulating weather-compensa-
Installation and connection
1a. rematic ®
SR 5240 C1 (no possibility for post-regula-
tion of central heating groups)
Installation in the boiler or in a reference room. In
the latter case, room compensation can be applied.
Connection via a two-core cable to plug K2 in the in-
strument box.
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1b. rematic 2945 C1 UMU (in addition to weather-com-
pensated pre-regulation of the boiler, also control of
one mixed and one unmixed central heating group)
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and rematic 2945 C1 MUMU (in addition to weath-
er-compensated pre-regulation of the boiler, control
of two mixed central heating groups).
Installation in the boiler. Connection via the rematic
adapter supplied.
2. Honeywell Chronotherm Modulation.
Installation in the reference room. Connection via a
two-core cable on terminals 13 and 14 of the X15
16-pole wire connector.
The standard interface should be exchanged.
For detailed information: see the documentation relating
to the control in question.
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