Viessmann Vitotronic 300 Installation And Service Instructions Manual page 80
Type gw5b, vitotronic 300, type gw5b weather-compensated, digital boiler control unit for boiler model cm2 - 400, 500, 620 and 620 tx
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Also See for Vitotronic 300:
- Installation and service instructions manual (164 pages) ,
- Operating instructions manual (73 pages) ,
- Technical data manual (8 pages)
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Designs
Connection and Wiring Diagram
PCB 120V~
sÖA1 High temperature circuit pump
DHW circulation pump
sA
DHW recirculation pump
sK
Accessories pump
sL
Power supply, 120V/60 Hz
fÖ
fA
Burner (call for heat)
Central fault message
gÖ
gSA1 Isolation valve
or
3-way mixing valve, primary store system (optional
accessory)
aBÖ
External connections, e.g. supplementary safety
equipment
Safety chain, potential free
aBA
aBH
Power supply for accessories
80
Vitotronic 300, GW5B Installation and Service
(continued)
F1, F2 Fuse/MCB
K1-K10 Relay
S1
ON/OFF switch
X
Electrical interfaces
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