28
D
E
F
1.
Remove plug
C
(
7
40 mm) from the
inside of the thermal insulation
block.
2.
Insert sight glass twin connector
D
into the boiler door.
3.
Insert hose barb
E
into sight glass
twin connector.
4.
Push vent hose
F
onto the hose
barb and connect with the burner.
Operation with third party burners (187 to 635 kW) without ventilation option
G
1. Do not
remove plug
C
(
7
40 mm)
from the inside of the thermal insula-
tion block.
2.
Insert sight glass twin connector
D
into the boiler door.
3.
Tightly seal the vent aperture on the
sight glass twin connector with the
plug R ¼
G
supplied, otherwise
there may be secondary ventilation
and condensate may form.
Danger
Leaks can result in a risk of
poisoning through escaping
gas.
Seal in plug carefully.
Boiler door for Unit version
Viessmann MatriX radiant burners (187
to 314 kW) have no inspection port.
Fitting the thermal insulation
(cont.)
5614 451 GB
