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8.7 Other inputs
8.7.1 Shut down input
As standard each boiler module is supplied with a shut
down interlock carrying a 24 Volt AC boiler control cir-
cuit. This input does not require manual re-set.
Any external devices required to stop the boiler mod-
ule (e.g. limit switches of throttling valves, minimum
gas pressure switches) should be wired in series and
connected to terminals X29-5 and X29-6, breaking the
circuit will activate the safety interlock and put the boiler
module into a shut-off condition with code b **. If
this input is being used, the wire bridge must first be
removed.
8.7.2 Lock-out input
As standard each boiler module is supplied with a lock
out interlock carrying a 24 Volt AC boiler control circuit.
This input requires manual re-set if activated.
Any external devices required to stop the boiler module
(e.g. maximum gas pressure switch) must be volt free
and should be wired in series and connected to termi-
nals X29-1 and X29-2. Breaking the circuit will activate
the safety interlock and put the boiler module into a lock
out condition, failure code 12 requiring manual inter-
vention to re-set it. If this input is being used, the wire
bridge must first be removed.
8.7.3 External interlock
As standard each boiler module is supplied with an
external interlock carrying a 24 Volt AC boiler control cir-
cuit. Any external devices required to prevent the boiler
module from operating (e.g. boiler room ventilation air
flow switch, or butterfly valve end switch) must be volt
free and should be wired in series and connected to
terminals X29-3 and X29-4, breaking the circuit will pre-
vent the boiler module from starting. Boiler module does
not go to lockout. If this interlock is being used, the wire
bridge must first be removed.
8.7.4 Other outputs
8.7.5 Analog output
Depending on the option settings in the service level
(see section 13.2.13), the analog output signal is able to
transmit the following values:
Output
Description
signal
0 volts
Boiler module off
0.5 volts
Alarm signal/lock-out
1.0 volts
Shut-off
3.0 - 10 volts Output between 30 and 100% or
flow temperature of 20 to 100 °
table 10 Analog output signal
This output relates to terminals X29-13 (+) and X29-14 (-).
Remeha Gas 610 ECO
8.7.6 Operation signal
As standard each boiler module is supplied with internal
relays to indicate boiler run and boiler on high fire.
The relay contacts are volt free and close to confirm
operation.
For the 'boiler on signal' connect to terminals X27-6 and
X27-7.
For the 'boiler high fire signal' connect to terminals X27-
4 and X27-5.
Contact load:
- Maximum voltage:
- Maximum current:
8.7.7 Common alarm (lock-out)
As standard each boiler module is 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.
For the alarm signal indication "closed contacts" connect
to terminals X27-3 and X27-1.
For the alarm signal indication "open contacts" connect
to terminals X27-3 and X27-2.
Contact load:
- Maximum voltage:
- Maximum current:
8.7.8 External gas valve control
As standard each boiler module is supplied with an
internal relay that is energised when there is a heat
demand, this applies a 230V supply to terminals X27-15
(live) and X27-14 (neutral). The relay is de-energised
when the gas valve multiblock closes at the end of the
heat demand. Additional external interlocks (by others)
may be required in a multi boiler installation.
g
Important!!
This supply cannot be used to con-
trol an external gas valve if it supplies other appliances.
Contact load:
- External gas valve voltage:
- Maximum current:
8.8 Options/ accessories
8.8.1 System pressure sensor
The system pressure sensor shuts down the boiler
module (with shut-off code b ^@) when the mini-
mum water pressure is reached (adjustable 0.8 to 6.0
bar - factory setting 1.0 bar, see section 13.2.12). The
hydraulic pressure sensor must be connected to the 5-
pin female plug X22 on the 24-volt terminal strip.
Press the s and e keys simultaneously for two sec-
onds to indicate the presence of the hydraulic pressure
sensor in the control unit.
g
Important!!
suitable for applications with a maximal operating pres-
sure of 4 bar.
28
230 volts.
1 Amp.
230 volts.
1 Amp.
230 Volts.
1 Amp.
The system pressure sensor is
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