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ELECTRICAL CONNECTION
Power supply
The boiler operates with a 230 V - 50 Hz single phase supply.
A double pole isolator with a 6 amp fuse or a 6 amp MCB must be
fitted outside the boiler to allow power to be shut off during servicing
and before any repairs are carried out on the boiler.
Conformity
Boiler installation must comply with the prevailing local standards
and legislation.
Safety
The stainless steel tank must be earthed separately.
The power to the boiler must be switched off before
any work is carried out.
Alarm - module
• Connect the flat ribbon cable from the alarm-module “X7” to MCBA
connector “X8”.
The volt free relays mounted on the alarm module will now be
actived as described below:
1 - Alarm:
This contact closes if the MCBA is in lock out.
2 - External gas valve / burner - run indication:
This contact closes if a heat request is present and the fan is running.
3 - Domestic Hot Water pump:
This contact closes if a Domestic Hot water heat request is present.
• Technical data:
-Ambient temperature: 0…60 °C
- Contact ratings: I
RMS
≤ 1A
230 V (+10% / 15%) 50 Hz
If inductive loads are connected, take precautions over
these loads against peak voltages (e.g. RC-network).
INSTALLATION
Connection
for transformer
1 2
3
Alarm - moduleInternal MCBA connections
MCBA
X8:
Ribbon cable
connection for
alarm module
(option)
X7:
Display
connection
X1
X4
X5X3X2
X1: Connection MCBA 230 Volt
X2: 24 Volt connector
X3: NTC - connector
X4: NTC 5 - analogue in connector
X5: Communication / NTC 4 - connector