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SAFETY INTERLOCKS
This applies to the Gas 310 Eco Pro and to each module on the Gas 610 Eco Pro.
The boilers are supplied with two interlocks as standard.
SHUTDOWN INTERLOCK
A shutdown interlock carrying a 24 Volt AC boiler control circuit.
This input does not require manual reset. Any external devices
required to stop the boiler (e.g. limit switches of throttling valves,
minimum gas pressure switches) should be wired in series and
connected to terminals BL. Breaking the circuit will activate the
safety interlock and put the boiler into a shut off condition.
RELEASE INPUT
A lockout interlock carrying a 24 Volt AC boiler control circuit.
This input requires manual reset if activated. Any external devices
required to stop the boiler (e.g. maximum gas pressure switch)
must be volt free and should be wired in series and connected to
terminals RL. Closing the circuit will activate the safety interlock.
HYDRAULIC PRESSURE SENSOR (WPS)
The hydraulic pressure sensor registers the water pressure and
can shut the boiler down when the minimum water pressure is
reached. To activate this blocking option, a minimum pressure
must be set with parameter P 2 8 (Factory setting 0 = off).
Connect the hydraulic pressure sensor to the WPS terminals
of the terminal strip.
0 = Earth or neutral of the power supply
S = Signal or output from the sensor
+ = Supply voltage
OPERATION SIGNAL
As standard the boilers are supplied with internal relays to
indicate boiler run. Contact load:
Maximum voltage: 230 Volts
•
COMMON ALARM (LOCKOUT)
As standard, the boilers are supplied with an internal change
over relay to indicate common alarm. The relay contacts are volt
free and can be connected to confirm operation with closed or
open contacts. Contact load:
Maximum voltage: 230 Volts
•
EXTERNAL GAS VALVE CONTROL
If there is a heat demand, an alternating voltage of 230 VAC,
1 Amp (maximum) becomes available on the EgV terminals of
the connector to control an external gas valve. Additional external
interlocks (by others) may be required in a multi boiler installation.
IMPORTANT! This supply cannot be used to control an external
gas valve if it supplies other appliances. Contact load:
External gas valve voltage: 230 Volts
•
Maximum current: 1 Amp.
•
Maximum current: 1 Amp.
•
Maximum current: 1 Amp.
•
OPTIONAL ACCESSORIES
Hydraulic pressure sensor
•
Minimum gas pressure switch
•
Second return
•
Cleaning tool
•
Water pressure sensor adaptor
•
BOILER PUMP CONTROL
The Gas 310/610 Eco Pro boilers have terminals, which can be
used to connect an external boiler pump. This pump runs once
every 24 hours to prevent sticking (24-hour pump operation).
Two options are available:
1. System pump connect to pump
terminals on PCU – 06 max 300VA
2. Shunt pump connect to terminal on
PCU – S05 plug x 03 max 300VA.
INSTALLATION SHUTDOWN
If the central heating system is not used for a long
period, we recommend switching the boiler off.
Switch the on/off switch to off
•
Switch off the boiler electrical power supply
•
Shut off the gas supply
•
Ensure that the boiler and system are protected
•
against frost damage.
CAUTION: In the event of low temperatures, we recommend
that the installation continues to operate at a lower temperature.
This prevents freezing.
FROST PROTECTION
CAUTION: Drain the boiler and central heating system if you are
not going to use the building for a long time and there is a chance
of frost.
For shorter periods: if there is no demand for heat, the boiler will
only switch on in order to prevent frost damage. When the heating
water temperature in the boiler falls by too much, the integrated
protection system in the boiler starts up. This protection functions
as follows:
The circulation pump switches on if the water temperature is
•
lower than 7°C (if pump is electrically connected to the boiler)
If the water temperature is lower than 4°C, the boiler starts up
•
If the water temperature is higher than 10°C, the boiler shuts
•
down and the heating pump continues to run for a short time.
CAUTION: The integrated protection system only protects the
boiler, not the installation.
WIRING LAYOUT AND
SAFETY INTERLOCKS
25
Gas leak switch (VPS)
•
Air filter
•
Recom kit
•
Combined roof flue kit
•
for flue 250mm/200.
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