206210-10235
Notes.
1. The boiler will automatically configure
itself to a Switched Live input.
2. The Switched Live must be from the
same phase as the boiler mains supply.
3. A Frost Thermostat can be connected
into the CH Call Input.
Pump
Boiler
Fused
Spur
Switched
Live
External Controls
LN E
EXTERNAL CONTROLS
VIA OPENTHERM
EXTERNAL CONTROLS
VIA 0-10V INPUT
EXTERNAL CONTROLS
VIA SWITCHED LIVE
Note that the boiler requires a 4 minute pump overrun
period.
The boiler warranty will be invalid if this is not provided.
It is recommended that the pump overrun functionality is
achieved by connecting the pump to the boiler CH Pump
connections (see diagram), although this functionality can
be replicated with external controls (for example a Building
Management System).
If the CH Pump connection is used and the electrical current
draw is 1.3A inductive or less then the pump can be connected
directly into the CH Pump connection (a Grundfos 40/50 UPS is
OK).
If the current draw is more than this (eg a Grundfos 40/120
UPS) then an external relay should be operated by the CH
Pump connection, with the external relay then powering the
pump.
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