Viessmann Type B2HA Operations Instructions download pdf (Page 18)

Outside temperature sensor !

For fitting the wireless outside tempera-

ture sensor (wireless accessory):

Wireless base station installation

and service instructions

Fitting location for outside tempera-

ture sensor

■ North or north-western wall, 2 to

2.5 m above ground level; in multi

storey buildings, in the upper half of

the second floor

■ Not above windows, doors or vents

■ Not immediately below balconies or

gutters

■ Never render over

Outside temperature sensor connec-

tion

2-core lead, length max. 35 m with a

cross-section of 1.5 mm

External demand via switching contact

Connection options:

■ Extension EA1 (accessory, see sepa-

rate installation instructions).

■

Plug lH.

Burner operation is load-dependent if the

contact is closed. The boiler water is

heated to the value set in coding address

"9b" in group "General"/1. The boiler

water temperature is limited by this set

value and the electronic maximum limit

(coding address "06" in group "Boiler"/

2).

Please note

'Live' contacts lead to short cir-

cuits or phase failure.

The external connection must be

potential-free and comply with

the requirements of safety cate-

gory II.

Installation sequence

Electrical connections

(cont.)

5772 909 GB

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 187 188

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Viessmann Type B2HA Operations Instructions Page 18

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