Viessmann AWS 104, Installation And Service Instructions For Contractors

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7
Symbol Explanation Connection
Refrigerant lines from/to the
external unit:
■ Hot gas line ■ 4 kW:
7
12 mm
■ 7 kW:
7
16 mm
■10 kW:
7
16 mm
■13 kW:
7
16 mm
■ Liquid gas line ■ 4 kW:
7
6 mm
■ 7 kW:
7
10 mm
■10 kW:
7
10 mm
■13 kW:
7
10 mm
DHW cylinder flow (heating
water side) G 1¼
+
Heating water return and DHW
cylinder return G 1¼
Heating water flow G 1¼
Safety valve —
1. Prepare the connections on the heat-
ing water and the DHW side.
Flush the heating system. 2. Prepare the electrical connections.
Note
You can route the BUS cable along-
side and can be secured to the refrig-
erant line.
Cable lengths inside the internal/external unit plus wall clearance:
Cables
Internal unit External unit
Power cables:
Heat pump control unit (230 V~) 2.0 m —
Compressor (230 V~) — 1.5 m
Additional connecting cables:
230 V~, e.g. for pumps
2.0 m —
< 42 V, e.g. for sensors 2.0 m —
Connecting cables between the internal/external units:
12 V BUS
1.0 m 1.5 m
43 V BUS 1.5 m 1.5 m
Preparing for installation
Requirements of on-site connections
(cont.)
5724 152 GB
Installation