Reznor ADFH Unit Installation Manual - Manual (Page 24)

Form I-ADF, Page 24
1. Prepare system for startup testing --
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Attach a slope gauge (0 to 1.0" scale) to the tubing connections in the control com-
partment. The two connections are located just left of the electrical box. Remove
the caps on the 1/8" NPT test connections and attach the slope gauge. (The
recommended method for attaching the slope gauge is to use field-supplied 1/8"
female NPT x 1/4" OD barbed hose connections.)
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Connect a "U" tube manometer to the main burner pressure tap
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Set BOTH the blower and burner service switches (located on the electronic circuit
board) to the OFF position.
2. Observe status lights on the electronic circuit board (assuming an optional
control relay is installed) --
□
Turn ON power to the system at the disconnect switch.
□
Check the electronic circuit board. One light should be lit - "Control Power".
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Turn OFF the disconnect switch.
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If the system has an optional relay (check wiring diagram), remove the wire from
Terminal 3 and Terminal 4 that connects the circuit to the optional "control relay"
contacts. Place a jumper wire from that Terminal 4 to empty Terminal 3.
□
Turn ON the disconnect switch. One or two lights should be lit - "Control Power" -
plus if equipped with a firestat - "Firestat Normal"
3. Check blower switch and blower rotation.

Place the blower switch (on the electronic circuit board) in TEST position. This will
bring on one or two additional lights - "Starter Energized" - and if equipped with a
freezestat - "Freezestat Normal".
NOTE: If unit is equipped with a discharge damper, the damper will begin to open.
When the damper reaches 80% open, the blower motor will be energized and
then the "Starter Energized" light will be actuated. After the blower obtains
normal speed (minimum .2" positive air pressure), the low air proving switch will
close and the following lights will be energized: "Low Air Pressure Normal";
"Limit Controls Normal"; and if these options are included, "High Air Pressure
Normal"; "Outside Air Cutoff Normal"; "Low Gas Pressure Normal"; "High
Gas Pressure Normal".
 Check blower rotation. If blower is turning backwards (see rotation arrows), do the
following.
 (A) Turn disconnect switch OFF and:
Single-phase units - rewire the motor per instructions on the motor plate.
Three-phase units - interchange any two motor leads at the motor contactor or starter.
 (B) Turn disconnect switch ON and verify correct blower rotation.
 Check blower operation to be sure there is no excessive vibration. If excessive
vibration is present, re-check belt tension, pulley alignment, bearing alignment,
blower wheel balance, and that components are attached securely. Determine and
eliminate the cause of excessive vibration before the system is put into operation.
4. Measure burner differential air pressure on the slope gauge Measure burner
differential air pressure on the slope gauge (connected to the unit in Startup
Step 1) .
 (A) If the system includes an optional discharge damper, before measuring burner
differential air pressure, check that the damper is fully open.
(1) Turn the disconnect switch OFF.
(2) Vertical Discharge - On the control side of the unit, open blower door.
(3) Horizontal or Vertical Discharge - Check damper. If not fully open,
adjust damper to the fully open position.
(4) Vertical Discharge - Close the door panel and secure the latches.
(5) Turn ON the disconnect switch.
 (B)With the blower operating, the pressure differential on the slope gauge should
read between .25" and .75" w.c. If the slope gauge reading is within those limits,
no adjustment is necessary. If the slope gauge reading is not within these limits, do
the following:
9.0 Commisoning
and Startup
(cont'd)
9.2 Startup
Diagnostic
Lights