Connection Of Combustion Air Device - Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual

Connections of combustion air device adaptor (VD2/VD2A/CT3 only)
D
Installation
Connection of the Combustion Air
Device Adaptor
1. Disconnect power to control and
burners.
2. Install Combustion Air Device
Adaptor, Part No.: 7134 563
on DIN Rail inside connection
enclosure (refer to installation
manual of Combustion Air
Device Adaptor).
3. Remove jumper between
terminals 16 and 17.
4. Make connection as shown in
the diagram.
IMPORTANT
Wire BK2 must be connected to
terminal 16 and BK3 to terminal
17 - DO NOT reverse.
A Combustion Air Device Adaptor
B DIN Rail in connection enclosure
Connection of the combustion air
blower to adaptor
Rated voltage: 120 VAC
Rating current: max 5 FLA
Recommended connection
wire size: AWG 14
Note:
Assure that combustion air blower
device is suitable for this application.
For detailed instruction on
adaptor installation, please refer
to the adaptor's installation manual.
1. Make connection as shown in
the diagram at left.
A Combustion Air Device Adaptor
in connection enclosure
B Combustion air blower motor
C Proving switch - "normally open"
rated for 120 VAC
D Power supply, 120 VAC
CAUTION
Provide disconnect means and
overcurrent protection as required
by local codes.
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