Weil-McLain WTGO 4 Series Manual page 17

WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —
Connect breeching
Figure 7
Back Outlet Breeching Vent Damper for
models which require a vent damper
OVD Damper
(Required)
BVSS
(WMO-1)
(Integrated with damper)
BVSS must be installed
upstream of the barometric
damper
Figure 8
Top Outlet Breeching for models which require
a vent damper
BVSS
(WMO-1)
(Integrated with damper)
BVSS must be installed
upstream of the
barometric damper
0250-056_OVD
Part number 550-142-332/0421
SERVICE TECHNICIAN ONLY — read and follow completely.
(continued)
Typical location for
barometric control
(Also see control
manufacturer's
instructions)
Flue pipe
bracket
(One on each
side of pipe)
0251-056_OVD
OVD
Damper
(Required)
Typical location for
barometric control
(Also see control
manufacturer's
instructions)
Flue pipe
bracket
(One on each
side of pipe)
Boiler Manual
Figure 9
Back outlet breeching connection for models
which do not require a vent damper
Typical location for
barometric control
(Also see control
manufacturer's
instructions)
Flue pipe
bracket
(One on each
side of pipe)
Figure 10
Top outlet breeching connection for models
which do not require a vent damper
Typical location for
barometric control
(Also see control
manufacturer's
instructions)
Flue pipe bracket
(One on each
side of pipe)
17