E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
51
Circulators: maximum electrical power
General
•
The inrush current of a conventional circulator is approximately 2½ x its nominal current.
•
The maximum switch current of the PCB is 4 A.
•
The total current of PCB and gas valve is approx. 0.5 A. All circulators and valves for the boiler loop, DHW,
and the system that are connected to the boiler should not exceed 3.5 A. (Combined power consumption of
internal circulator P1 and three way valve is 1 Amp) Use separate relays if higher currents are needed. The
fan is separately connected to the main supply and has a fuse of 3.15 A.
Boiler circulator (circulator P1)
This circulator is part of the appliance. The maximum combined current for the boiler loop circulator and any
additional circulators and valves should not exceed 2 A.
The internal boiler pump/circulator is electrically connected to connections
6-7-PE Boiler Circulator (general pump)
BE AWARE in the software the description “General Pump” is used for “Boiler Circulator”
DHW indirect tank circulator (circulator P2) – VGH-CH only
The circulator (circulator P2) is a DHW indirect tank circulator, meaning it is not part of the appliance. The maximum
combined current for the indirect tank circulator and any additional circulators and valves must not exceed 2 A.
Only
Heating Only
(CH)
boilers can use a DHW indirect tank circulator; Combi boilers
never
use a DHW indirect
tank circulator.
3-way valve – VGH-CH only
The combined nominal current of circulator P1 and the 3-way valve should not exceed 2 A.
System circulator (circulator P3)
The maximum combined current of circulator P3 and the other connected circulators should not exceed 2 A.
Warning (ECM circulators)
An ECM circulator cannot be powered directly by the boiler. Use a relay to isolate the boiler from the circulator.
C
IRCULATOR POWER CORD POSITIONING
Be aware to connect the power cord right when replacing the circulator or after disconnecting the power cord for
service. See pictures below:
Use an external relay if
nominal circulator currents
exceed 2 A.
To all outputs following applies: maximum
current 2 A each output. Total output of all
currents combined maximum 3.5 A.
(Combined power consumption of internal
circulator P1 and three way valve is 1 Amp)
The inrush current of the 3-way valve and/or
circulators is maximum 8 A.
Picture 8.1
Picture 8.1
Picture 8.2
NOTICE
NOTICE
WARNING
FLAT
ROUND
RIGHT CONNECTOR AND CORD POSITIONING
Summary of Contents for VHG-100-CH
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