Viessmann BWT 241.A Series, Installation And Service Instructions Manual

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8
E Primary circuit flow (heat pump
brine inlet)
F Secondary circuit flow (heating
water)
G Secondary circuit return (heating
water)
H Solar circuit flow
K
Solar circuit return
1. Prepare the connections on the heat-
ing water and the DHW side.
Flush the heating system.
Connection of hydraulic pipes
D
to
G
:
■ On-site connection:
Use straight pieces of pipe (stand-
ard delivery).
■ With the connection set primary cir-
cuit/secondary circuit (accesso-
ries):
Use pipe bends from the connec-
tion set.
2. Prepare the electrical connections.
Pipe lengths:
■ Required pipe length inside the appli-
ance plus wall clearance
2.25 m
■ Height, wall outlet:
2100 mm (see "Technical guides for
heat pumps")
Recommended power cables:
Type BWT/BWT-M
242.A06 242.A08 242.A10
Heat pump control unit 230 V~
Cable cross-section
■ Without power-OFF
3 x 1.5 mm
2
3 x 1.5 mm
2
3 x 1.5 mm
2
■ With power-OFF
5 x 1.5 mm
2
5 x 1.5 mm
2
5 x 1.5 mm
2
Compressor
Cable cross-section
■ 400 V~
5 x 2.5 mm
2
5 x 2.5 mm
2
5 x 2.5 mm
2
■ 230 V~
3 x 4 mm 2 3 x 4 mm 2 3 x 4 mm 2
Max. cable length 25 m 25 m 25 m
Instantaneous heating water
heater
8.8 kW
Cable cross-section
■ 400 V~
5 x 2.5 mm 2 5 x 2.5 mm 2 5 x 2.5 mm 2
■ 230 V~ 7 x 2.5 mm 2 7 x 2.5 mm 2 7 x 2.5 mm 2
Max. cable length 25 m 25 m 25 m
Preparing for installation
Requirements concerning on-site connections
(cont.)
5601 598 GB