Explanation Of The High Voltage Connections Vgh-Ch Boilers - Slant/Fin VHG-100-CH Installation And Service Manual

E
XPLANATION OF THE HIGH VOLTAGE CONNECTIONS
1-2-3-PE
This connection is internally connected to the 3-way valve in the appliance
4-5-PE
Connections for the power supply of a central heating system circulator P3, see paragraph 8.5.for detailed
electrical specifications. PARAMETER: boiler parameter 125, see paragraph 10.6
When using DHW mode 1 or 2 and the coil in the tank has a high pressure drop an extra DHW circulator can
be added. The pump can be connected to terminals 4-5-PE. Therefore the parameter on output 1 needs to be
changed from 4 (System circulator) to 3 (DHW circulator) (see paragraph 11.9.2).
4 = Line voltage (Hot) wire; 5 = Neutral wire; PE = Ground
6-7-PE
Connections for the power supply of the internal boiler circulator. (P1, see paragraph 8.5 for detailed
specifications).
8-9-PE-PE
The power supply connection of the unit. 8 = Line voltage wire; 9 = Neutral wire, PE = Ground wire
10-11
A semiconductor alarm output.
This is a triac output with an active voltage of 120 VAC, it can only handle resistive loads between 5 and 50
Watt. E.g. an incandescent bulb of 10-50 Watt can be connected. This alarm will be activated 60 seconds after
an error has occurred.
There are a few exceptions:
- Alarm output will not be activated for a service warning;
- Alarm output will not be activated for warning 202 (Appliance selection).
10 = Line voltage (Hot) wire; 11 = Neutral wire
PARAMETER: boiler parameter 127, see paragraph 10.6.
X1-X2-X3
A separate connector for an external igniter is located on the wiring harness, near the boiler controller and
labelled "High power ignitor". This is a connection for an external ignition transformer. Instead of the internal
igniter, an external igniter can be connected. Available as an accessory, see paragraph 5.1.
X1 = Neutral wire; X2 = not used; X3 = Line voltage (Hot) wire.
PARAMETER: boiler parameter 126, see paragraph 10.6.
Table 10.2
(Combined power consumption of internal circulator P1 and three way valve is 1 Amp)
NOTICE
BE AWARE in the software the description "General Pump" is used for "Boiler Circulator"
NOTICE
78
3 WAY VALVE (TWV)
SYSTEM PUMP / DHW CIRCULATOR / CH CIRCULATOR
BOILER CIRCULATOR / GENERAL PUMP
MAINS SUPPLY
ALARM RELAY
HIGH POWER IGNITER (external igniter)
To all outputs following applies: maximum current 2 A each output.
Total output of all currents combined maximum 3.5 A.
The inrush current of the 3-way valve and/or circulators is maximum 8 A.
The internal boiler pump/circulator is electrically connected to connections
6-7-PE Boiler Circulator (general pump)
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
VGH-CH
BOILERS