Reznor LDAP Unit Installation Manual - Manual (Page 39)

Form I-LDAP, P/N 207733R6, Page 39
10.1.7 Fan Motor(s),
Fan Blades, and
Guard(s)
FIGURE 28 - Fan
Blade Position on
the Shaft
3”
(76mm)
Fan
Motor
Fan
Blade
Remove dirt and grease from each motor, fan guard, and blades. Use care
when cleaning the fan blades to prevent causing misalignment or imbalance.
Check that the hub of the fan blades is secure to the shaft.
Follow these instructions for replacement of the fan guard, fan motor and/or fan
blades. Repeat the procedure for each heater section.
1. If the heater is installed, turn off the gas and disconnect the electric power.
2. Open the access door and disconnect the fan motor wires, capacitor wires
at the capacitor, and ground screw.
3. Remove the assembled parts (the fan guard, the motor and the fan blade).
4. Disassemble and replace whatever parts are needed and reassemble
using whatever part(s) are being replaced and the original parts.
Be sure the fan blade is in the proper position on the shaft; refer to the
illustration in FIGURE 28.
10.1.8 Operating Gas
Valve(s)
Carefully remove external dirt accumulation and check the wiring connec-
tions. Size 400 has one valve; Size 800 has two valves; Size 1200 has three
valves.
WARNING: The
operating valve is
the prime safety
shutoff. All gas
supply lines must
be free of dirt
or scale before
connecting to the
heater to ensure
positive closure.
See Hazard Levels,
page 2.
The combination gas valve must be checked annually to ensure that the valve
is shutting off gas flow completely.
Instructions:
1) Locate the 1/8” NPT pressure tap on the combination valve.
Single-Stage Valve
1/8” Outlet
Pressure Tap
1/8” Outlet
Pressure Tap
Two -Stage Valve (optional
on Model LDAP 400 only)
NOTE: Operational
pressure settings and
instructions for checking
pressure settings are in
Paragraph 12.
FIGURE 29 - Pressure Tap for Checking Gas Flow Shutoff
Position the assembly on the heater. Attach
the fan guard.
Rotate the fan blade to check for adequate
clearance. If adjustment is required, loosen
the mounting screws, re-position the fan
guard, and tighten the screws. Rotate
the fan blade and re-check for adequate
clearance. Repeat this procedure until the
assembly is positioned properly.
5. Reconnect the fan motor wires according to the wiring diagram and close
the access panel.
6. When finished with all sections, restore power to the heater and turn on the
gas. Light, following the instructions on the lighting instruction plate. Check
for proper operation.