Viessmann B2TB, Installation And Service Instructions For Contractors, Page: 9 / 156

9
Use a connection set or connection kit, available as an
accessory, to make the connection on the gas and
water sides.
Fitting accessories
Fit all accessories that are installed at the back of the
boiler (e.g. connection sets).
Preparing connections on site:
Connection set installation instructions
or
Assembly kit installation instructions
Note
Fit safety equipment in accordance with the national
regulations.
!
Please note
Avoid damaging the appliance.
Connect all pipework free of load and torque
stress.
The following diagram shows sample connection sets
for installation on finished walls, with connection to the
top or side.
100
569
46
40
50
c d
e f
g h
k
l m n p
a b
140
50
320
361
398
410
80
A
C
D
F
E
B
E
F
B
A
D
C
K
G
H
G
Ø 60,5
+0,8
Ø 96
-0,5
Fig. 1
q
50
595
50
600
55
220
330
G
C
A
B
F
D
E
Fig. 2
A
Heating flow R
¾
B
DHW R
½
C
Gas connection R
¾
D Cold water R
½
E
Heating return R
¾
F
DHW circulation R
½
(separate accessory)
G
Condensate drain facing backwards into the wall
H
Condensate drain to the side
K
Wiring area
Rated heating output 13, 19, 26
kW
35 kW
a (mm) 745 945
b (mm) 750 950
c (mm) 972 1172
d (mm) 1027 1227
e (mm) 1082 1302
f (mm) 1137 1337
g (mm) 1191 1391
h (mm) 1247 1447
k (mm) 1302 1562
l (mm) 1437 1637
m (mm) 1466 1666
n (mm) 1465 1665
p (mm) 1526 1726
q (mm) 201 224
Note
All height dimensions have a tolerance of +7 mm on
account of the adjustable feet.
Preparing for installation
Preparing for boiler installation
5789 302 GB
Installation