Flue Gas Damper/Ventilation Air Damper Electrical Connection - Wolf CGB-2 Series Installation Instructions For Contractors

Flue gas damper/ventilation air damper electrical
connection
- Isolate the system from the power supply before opening.
- Check that the appliance is isolated from the power supply.
- Swivel the front panel to one side.
- Remove the front casing.
- Open the lower casing cover of the HCM-2.
- Remove the insert from the HCM-2 casing.
- Strip approx. 70 mm of insulation from the connecting cable
of the damper motor and signal contact.
- Pull the Rast5 plug out from output A1.
- Push the connecting cable of the flue gas damper/ventilation
air damper motor through the strain relief (insert) and secure.
- Terminate the cores at the Rast5 plug A1 and insert the plug.
- Pull the Rast5 plug out from input E1.
- Push the limit switch lead of the flue gas damper/ventilation
air damper motor through the strain relief (insert) and secure.
- Terminate the cores at the Rast5 plug E1 and insert the plug.
HCM-2 electrical connection
LP
L1 N
Damper function test
•
Start the appliance
•
Inspect visually to ensure damper is open
•
Unplug E1 for 2 minutes during operation.
Boiler must lockout with fault code 8, with the fan continuing to run at low speed.
•
Reconnect E1
•
Acknowledge fault message
•
Inspect visually to ensure flue gas damper is closed
32
16 Flue gas damper/ventilation air
damper electrical connection
A1 (programmable output)
E1 (programmable input, e.g. flue gas damper)
A1
E1 E2 AF
a b
L1 a b 1 2
1 2 1 2
1 2
Flue gas damper motor/venti-
lation air damper motor
Note:
The contractor parameter
HG13 (input 1) must be set to
Fl. gas damper
and
HG14 (output 1) must be set to
Fl. gas damper.
When the limit switch is open, the burner
is blocked both for DHW and central heat-
ing as well as for emissions test and frost
protection.
SF
eBUS
-
+
1 2
1 2 1 2
M
230V~
Limit switch
Please note:
The limit switch for the flue gas
damper/ventilation air damper
must be potential-free.
Otherwise the HCM-2 control unit
PCB will be destroyed.
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