26
P/N 42-9551
KN Series Gas-fired direct vent cast iron boilers – Field assembly instructions
Step 74
Connect wires to air box
components
See the wiring diagrams,
Figure 1, page 28
and Fig-
ure 2, page 30
for detailed
information.
1. Connect the wires from the air pres-
sure switch and relief valve switch to
the control panel.
2. See callout 3 in schematic wiring
diagram, Figure 1, page 28.
Step 75
Connect wires to air box
components
See the wiring diagrams,
Figure 1, page 28
and Fig-
ure 2, page 30
for detailed
information.
1. Connect wires from remote LWCO,
gas valve molex, LGPS and pilot gas
valve.
2. See callouts 1, 2, 4, 5 and 6 in
schematic wiring diagram, Fig-
ure 1, page 28.
Step 76
Connect motor wires
See the wiring diagrams,
Figure 1, page 28
and Fig-
ure 2, page 30
for detailed
information.
1. Attach the BX conduit fitting on
the motor conduit to the top of the
control panel.
2. Connect the wires to the matching
color coded/numbered wires in the
control panel.
3. See callout 7 in schematic wiring
diagram, Figure 1, page 28.
Step 77
Install the air filter
1. Place the air filter in the air box as
shown.
2. The left top edge of the filter must go
against the inside left of the air box.
3. The bottom right of the filter goes
against the bottom right of the air
box.
