Dunkirk Excelsior EXB Series - Manual (Page 16)

16
16. Connect Field Wiring. See “13 - Electrical
Connections” on page 34.
A. Route wire harness from burner to Limit control
through rear jacket panel. See Figure 15, Page 17.
Connect molex plug on burner wire harness to its
receptacle on limit control.
B. If optional manual reset high temperature limit is not
used, ensure supplied jumper is installed.
C. Connect the wiring harness from limit control to
circulator. See Figure 15, Page 17.
D. 120 volt power supply field wiring connects to limit
control. Provide appropriate overcurrent protection
and service disconnect switch.
E. Wire power supply. See Figure 15, Page 17.
Connect green wire to grounding lug. When
installing wiring through hole in Limit, use anti-
abrasion cable clamp. Connect black “hot” wire to L1
of terminal block, white “N” wire to L2 of terminal
block.
17. Install top panel. Place on top of side panels. Position
tabs in top panel into slots in side panels. Push top
panel toward back of boiler. Install rear panel screws.
18. Install drain valve. Install drain valve with hose
connection facing right or left. This allows clearance
for swing door to open and close with drain and
hose attached. Verify connection is water tight. See
Figure 16, Page 17.
19. Close burner swing door.
A. Use one hand to hold door in position by applying
pressure directly to door while re-installing securing
hardware with your opposite hand. Always install
non-hinged side latching hardware first, then install
hinged side hardware. Apply additional pressure
while hand tightening hardware as far as possible,
then release pressure.
Table 4 - BAFFLES & LINERS
Sections Liner
Liner
Length
Baffles
4 Oval 4” 9”
5** V SHAPE 9” 12”
6 V SHAPE 12” 15”
7 V SHAPE 14” NONE
** 9” V liner used only on Models 5115 and 5135
and only with Beckett NX burner. All other 5 section
models and burner combinations use no liner.
Figure 11 - Oval Liner
Figure 12 - V-Shaped Liner
Figure 13 - 3rd Pass Baffles
8 - BOILER ASSEMBLY