Viessmann Vitocal 300-G BW, Инструкция по установке и обслуживанию

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170
q¢R Fault message, lag heat source,
zero volt contact closed: Appliance
operational (delivered condition:
jumper fitted)
q¢T Brine pressure limiter, frost stat
(insert jumper, if no safety ele-
ment is connected)
q¢Z Power-OFF (jumper fitted in the
delivered condition, remove
jumper if making this connection,
contact closed: Safety chain has
continuity, appliance operational)
q¢U Flow limiter (jumper fitted in the
delivered condition, remove
jumper if making this connection,
outside the safety chain)
q¢I Appliance fuse F1 ( 6,3 A (slow))
q¢O Mains power directly from the
mains terminal (test point)
Connection markings
■ Terminal strip X1:
Terminals 1X1.1 to 1X1.
?
■ Terminal strip X2:
Terminals 1X2.1 to 1X2.N
■ Terminal strip X3:
Terminals 1X3.1 to 1X3.18
For PCB overview, see from page 59.
Note
■ Total load of all electrical connections
max. 1000 W.
■ Neutral conductor and earth conductor
are connected to terminal strips X1
and X2.
■ Terminals may already have been
allocated (subject to appliance ver-
sion). If this signal is required exter-
nally, completely remove the core or
remove and insulate the core end;
alternatively use a twin wire ferrule.
Message and safety connections at PCB 1 (cross connect circuit board)
Function
Explanation Connection
Fault message, lag heat
source Connect zero volt contact on site:
■ Closed = no fault
■ Open = fault
■ Breaking capacity 230 V, 0,1 A
■ Delivered condition: Jumper fitted 1X3.11
1X3.10
External demand to the
heat pump; mixer OPEN;
operating mode change-
over Connect zero volt contact on site:
■ Closed = demand
■ Open = no demand
■ Breaking capacity 230 V, 0,1 A 1X3.13
1X3.12
or to external
extension
H1
Connection and wiring diagrams
PCB 1: Message and safety components
(cont.)
5368 522 UAE