Viessmann VD2 Series Informations techniques télécharger pdf (Page 64)

Control Overview—Combustion Air Control

Common Combustion Air Device Interface—System Boiler Connections

Applicable for Vitotronic 100, GC1

1 Call for heat demands from

individual boiler combustion

modules.

Note: All demand connections

are paralleled together

terminated in common

combustion air device interface.

2 Individual proving switch

signals provide damper/blower

status.

All individual connections come

from common combustion air

device interface.

3 Individual boiler combustion air

device adaptor. Mounted on

each boiler control DIN rail.

4 Air proving switch terminals on

each adaptor module. The

marking NO refers to Normally

Open.

5 Terminals which provide call for

combustion air device demand.

4 5

NO NO L L

Proving

Switch

Dry Contact

Activation

Section 3.5.6

Section 3

Connection Overview

IMPORTANT

Ensure that combustion air device is

suitable for intended application.

CAUTION

Provide disconnect means and over

current protection as required by local

codes.

IMPORTANT

A four-wire interconnection

between each boiler and the

common combustion air device

interface is required. This is a

120VAC circuit.

CAUTION

When making connections with

individual boiler interface adaptors,

ensure the power is turned off at the

boiler control.

5346540 v1.0 09/2006 Technical information subject to change without notice

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Viessmann VD2 Series Informations techniques Page 64

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