Tjernlund PAI-1 & 2O Combustion Air In-Forcer 8504038 Rev A 05/01 - Manual (Page 9)

8
ELECTRICAL WIRING OF IN-FORCER MODELS PAI-1O & PAI-20 (OIL)
All wiring from the IN-FORCER to the appliance must be appropriate Class 1 wiring as follows: installed in rigid metal conduit, inter-
mediate conduit, rigid non-metallic conduit, electrical metallic tubing, Type MI Cable, Type MC Cable or be otherwise suitably protect-
ed from physical damage. The electrical contact rating for the
Fan Proving Switch is 3 Amps Inductive. The Fan Proving Switch is
not suitable for loads which exceed the above limit.
SEQUENCE OF OPERATION WITH IN-FORCER INTERLOCKED ON OIL FIRED APPLIANCES
As the thermostat /aquastat senses a call for heat the internal switch of the the thermostat/aquastat will close. The switch closure
sends current through the internal controls of appliance (i.e. high limit, low limit and all other safety controls the appliance is equipped
with) and continues through the R8184G primary control. Current will then flow out of the orange of the R8184G to the IN-FORCER
motor. After draft is established within the IN-FORCER, the damper opens closing Fan Proving Switch safety circuit contacts. This
completes the circuit to the 115V indicator light and the burner motor. It is important to remember that the electrical interlock of the
IN-FORCER is always done at the final signal which would normally start the burner motor. All thermostats, zones, limits and circula-
tors are to be wired as normally done on a chimney vented appliance.
If your appliance is not equipped with a R8184G as outlined in these diagrams, locate the wire from the primary control which is con-
nected to the black burner motor wire and follow the steps outlined at the top of page 9.
NOTE: The indicator light on the IN-FORCER signals that it is functioning properly. If the light is on and appliance will not fire, there
may be an appliance malfunction or wiring error in the interlock. See troubleshooting section for further details.
IN-FORCER MODELS PAI-10 & PAI-20 JUNCTION BOX LADDER DIAGRAM
CAUTION
ALL WIRING FROM THE
IN-FORCER TO APPLIANCE
MUST BE CLASS 1
NOTE:
For all wiring into IN-FORCER leave
approximately 10” or sufficient slack in
wiring for pull-down servicing feature of
IN-FORCER. See diagrams to right.
Remove six (6) screws from bottom front
and sides of IN-FORCER while holding
blower assembly firmly. Carefully slide
blower assembly down until stops hold in
place. See diagram on page 17.
NOTE:
For access to IN-FORCER electrical box, remove six
(6) screws from bottom front and sides of IN-FORCER
while holding blower assembly firmly. Carefully slide
blower assembly down until stops hold in place. See
diagram on page 17.