REMEHA W40 Installation And Maintenance Instructions Manual page 26

8.3.2 Room thermostat 24V
The remeha W40/60-m ECO is suitable for a 2- or 4-
wire standard room thermostat.
Proceed as follows:
a. Connect the room thermostat to terminals 1 and 2 of
the 16-pole wire connector.
b. Set the anticipated current of the room thermostat at
0.11 A.
8.3.3 Room thermostat in combination with an out-
door temperature sensor
In order to use the modulating operation of the appliance
throughout the entire heating season using a room
thermostat, it is possible to install an outdoor tempera-
ture sensor (0S). Connect the wires to terminals 10 and
11 of the 16-pole wire connector. The earth slider should
be connected to the earth lip on the instrument panel.
The appliance will now modulate at a flow temperature
relative to the outdoor temperature (see stoking line
graph para. 10.3.3) in the event of heat demand (from
the room thermostat).
Installation of the outdoor temperature sensor
Fit the outdoor sensor on a north or northwest facing
wall, at a height of at least 2.5 metres from ground level.
Do not install close to windows, doors or air vents,
kitchen extractor, etc. and make sure the sensor is pro-
tected from direct sunlight.
Lay the cable to the boiler. The cable is supplied in a
standard 15 metre length, and may not be extended. If
the cable is extended, problem-free operation cannot be
guaranteed.
8.3.4 Two-stage external weather compensator
The remeha W40/60-m ECO can be connected to a two-
stage external weather-compensator. The boiler can run
on high/low.
Proceed as follows:
a. Connect the first stage (low) to terminals 1 and 2 of
the 16-pole wire connector and the second stage
(low/high) to terminals 8 and 9.
b. Set the internal control to high/low (see para 10.3.6).
8.3.5 D.H.W. control
The D.H.W. can be connected in two different ways:
Either with a standard D.H.W. thermostat (Tdhw) or with
a Remeha temperature sensor (Sdhw).
The installation procedure is as follows:
A. Installation with a D.H.W. thermostat
a. Connect the D.H.W. thermostat to terminals 3 and 4 of
the 16-pole wire connector.
b. Connect the three-way valve (230V) to the Euro-con-
nector at the side of the terminal box.
c. Set the D.H.W. control (see para. 10.3.7 - 10.3.11).
B. Installation with a D.H.W. sensor
a. Connect the D.H.W. sensor to 11 and 12 of the 16-
pole wire connector. Connections may be inter-
changed.
b. Connect the three-way valve (230V) to the Euro-con-
nector at the side of the terminal box.
c. Set the D.H.W. control (see para. 10.3.7 - 10.3.11).
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remeha W40/60-m ECO