Weil-McLain SERIES 7 PFG - Manual (Page 6)

6
PFG S
erieS
7 G
aS
-
Fired
W
ater
B
oiler
– U
niverSal
C
ontrol
S
yStemS
Part Number 550-110-643/0605
These boilers must have vent dampers:
• PFG 5 (U.S. only)
These boilers may have vent dampers:
• PFG 6-8 (U.S. only)
• PFG 5-7 (Canadian)
These boilers must not have vent damper:
• PFG 8 (Canadian)
If not installing damper, proceed to page 7.
1.
Once damper is installed on boiler,
boiler will not operate without
damper installed.
Only dampers listed on page 16 are
approved for use on PFG Series 6 &
7 boilers. Any other damper installed
can cause severe personal injury or
death.
2. Effikal and Johnson dampers - install plug (packed in damper
carton of 4” thru 8” dampers) in hole in damper blade.
3. Minimum clearances:
PFG - 48” between jacket top and combustible ceiling.
DO NOT modify draft hood or
damper, or make another connection
between draft hood and damper
or boiler. This will void C.S.A.
certification and will not be covered
by Weil-McLain warranty. Any
changes will cause severe personal
injury, death or substantial property
damage.
4.
PFG - Damper must be installed directly on top of draft
hood so that it serves only one boiler and so that damper
blade indicator is visible to homeowner. See Figure 1 or 2
and Figure 3 or 4.
Where screws or rivets are used to secure damper to draft
hood, they must not interfere with free movement of damper
blade.
5. Install damper harness between damper actuator and knock-
out in jacket top panel. Use strain relief connectors and
locknuts to secure both ends of damper harness. See Figure
1 or 2.
Keep wiring harness clear of all hot
surfaces.
6. Remove dummy receptacle from damper plug in boiler wiring
harness. Plug damper harness receptacle into damper harness
plug. See Figure 1 or 2.
Bypassing (jumpering) damper will
cause flue products such as carbon
monoxide to escape into house. This
will cause severe personal injury or
death.
After boiler has operated once, if
either end of harness is disconnected,
system shutdown will occur. Boiler
will not operate until harness is
reconnected.
7. Effikal damper - damper “Hold Open” switch must be in “Au-
tomatic Operation” position for system to operate properly.
8. Apply label shown in step 5 to damper, so that it is visible
after installation.
9. Proceed to page 7.
Johnson Damper
Figure 4
Effikal Damper
Figure 3
Section B: Damper Installation