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There are several options to set the required flow tempe-
rature and the start command to the boiler.
A1. Start/stop through a volt free contact.
Select in the service level the option 'Input selection:
relay contacts'.
The start command to the boiler comes free when relay
contacts close. The power for this input is supplied by the
boiler at a level of 24V DC.
This start command should be connected to the termi-
nals 23 and 24 of the terminal strip in the boiler control
panel (behind the front casing, underneath the instru-
ment panel). This input is indicated by the following sym-
bol:
The current through the contacts is approx. 6 mA
(see the electrical wiring dia gram at para. 10.9).
The required flow temperature can be set manually by
means of the in stru ment panel. Go to the fifth menu of
the user level, using the ' ' button, for setting the maxi-
mum flow temperature (see para. 7.3.2).
A2. Start/stop through the option 'analog'.
Select in the service level the option 'Input selection:
analog". This analog signal (0-10V) should be connected
to the terminals 27 (-) and 28 (+) on the ter mi nal strip in
the boiler control panel and is indicated by the following
symbol:
The input resistance at the analog input is approx. 10 k
(see also electrical wiring dia gram at para. 10.9).
This signal represents the start command and the
required flow temperature according to fig. 15.
A3. Start/stop through the RS 232 bus.
Select in the service level the option 'Input selection:
computer'. Through a PC or BMS the start/stop com-
mand and the required flow temperature are now trans-
mitted to the boiler.
Contact our technical department for more information
about RS 232 connection.
B. External control
Select in the service level the option 'Control selection:
External' (see para. 7.3.3). Now you can choose the
output of the boiler, there are two choices.
B1. Through an analog signal
Select in the service level the option 'Input selection:
analog'. This analog signal (0-10V) should be connected
to the terminals 27 (-) and 28 (+) on the ter mi nal strip in
the boiler control panel and is indicated by the following
symbol:
10. ELECTRICAL SUPPLY
10.1 General
The electrical installation must be conform to the I.E.E.
regulations and also to the local authority requirements.
10.2 Electrical connections
The boiler is entirely prewired. The installation con trac tor
only has to provide for the electric power supply (230V,
50 Hz) and the external wiring (cut-in commands, mes-
sages, etc.). The electrical connections must comply with
the supplied wiring diagram.
On top of the boiler local to the connections (standard
left) a passage for the cabling (cable trunking 40x40 mm)
is provided.
10.3 Electrical data
Power supply: 230V-50 Hz (phase/neutral)
Maximum input power:
7 300 VA (250 W) 140 VA (100 W)
9 310 VA (260 W) 120 VA (70 W)
11 580 VA (380 W) 140 VA (90 W)
13 725 VA (490 W) 150 VA (100 W)
15 800 VA (550 W) 140 VA (90 W)
17 820 VA (570 W) 150 VA (100 W)
19 880 VA (610 W) 170 VA (110 W)
Installed fuse value:
Weather-compensated control 6,3 A, slow blow
Electronics 1 A, fast blow
Fan/gas block 4 A, slow blow
Connecting cable: 1
1
/
2
mm
2
VMvK.
When using an automatic fuse, the following minimum
values have to be used:
- 7 to 15 sections: 10A
- 17 and 19 sections: 16A .
Reference to good earth connections required.
10.4 Boiler control
10.4.1 General
The Remeha Gas 3002 ECO can operate fully modula-
ting (between 33 and 100%) or high/low.
10.4.2 Modulating
The Remeha Gas 3002 ECO modulation can be control-
led internally or externally.
A. Internal control
The control unit has an advanced PI control, which can
modulate the boiler control, based on the desired flow
temperature. To do so select in the service level the
option 'Control selection: internal' (see para. 7.3.3).
Number
of sections
Maximum load Minimum load
23


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