Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 5 / 148

C
DHW cylinder flow G1½"
D
Gas connection
E
DHW cylinder return G1½"
F
Heating return G1½"
G
Expansion vessel
H
Cable arrangement area
K
Recommended dimension
L
Condensate drain
1. Prepare the water connections.
Thoroughly flush the heating sys-
tem.
2. Prepare the gas connection
according to TRGI or TRF or all
local regulations.
3. Prepare the electrical connections.
& Mains cable: NYM-J 3 x 1.5 mm
2
,
fuse max. 16 A, 230 V~, 50 Hz.
& Accessory cables: NYM with the
required number of conductors
for the external connections.
& All cables in area
H
should pro-
trude 1200 mm from the wall.
Preparations for boiler installation
(cont.)
5
58
62
570
GB