Tjernlund PAI-1 & 2O Combustion Air In-Forcer 8504038 Rev A 05/01 - Manual (Page 11)

NOTES: The IN-FORCER is always interlocked with the primary control of the appliance. Wire all other furnace/boiler controls as nor-
mally done when conventional venting before continuing. Disconnect power from the appliance before attempting to interlock IN-FORCER.
The instructions below assume that the IN-FORCER and HST are installed at the same time.
Step 1: Disconnect the BLACK burner motor wire from the ORANGE wire on R8184G.
Step 2: Connect the BLACK burner motor wire to the YELLOW wire in IN-FORCER electrical box.
Step 3: Connect the ORANGE wire on R8184G to the ORANGE and BLUE wires in Power Venter electrical box.
Important: The ORANGE wire from R8184G should also be connected to the Ignition Transformer or Oil Valve.
Step 4: Connect the YELLOW wire in Power Venter electrical box to the BLACK wire in IN-FORCER electrical box.
Step 5: Connect the WHITE/BROWN wire in Power Venter electrical box to the WHITE wire in R8184G.
Step 6: Connect the GREEN wire in IN-FORCER electrical box to the GREEN or ground wire of burner motor.
Step 7: Connect the WHITE wire in IN-FORCER electrical box to the WHITE of R8184G.
ELECTRICAL WIRING IN-FORCER MODELS PAI-1G & PAI-2G (GAS)
The IN-FORCER PAI-G Series comes with a factory wired 25’ long 3 wire cable and 6’ long 120 VAC grounded wall plug. These are
all that is necessary to make all wire connections if IN-FORCER is interlocked with appliance only.
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 24V GAS 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 to IN-FORCER relay. When the relay receives current, the IN-FORCER motor is energized. After draft is estab-
lished, the IN-FORCER damper opens closing Fan Proving Switch safety circuit contacts. This completes the circuit to the 24V indi-
cator light and the 24V gas valve. It is important to remember that the electrical interlock of the IN-FORCER is always done at the
final signal which would normally control the gas valve. All thermostats, zones, limits and circulators are to be wired as normally done
on a chimney vented appliance.
If your appliance gas valve is not labeled TH, TR as outlined in these diagrams, determine the “HOT” and “COM” terminals on the gas
valve and follow the steps outlined on the middle of page 11.
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-1O & PAI-2O CONNECTED TO AN R8184G WITH TJERNLUND HST POWER VENTER
(BURNER MOTOR LESS THAN 3 AMPS INDUCTIVE @ 120 VAC)
10
NOTE:
For all wiring into IN-FORCER leave approxi-
mately 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.