Reznor LDAP Unit Installation Manual - Manual (Page 37)

Form I-LDAP, P/N 207733R6, Page 37
Ignitor - Refer to FIGURE 22 and locate the ignitor. Disconnect the wire;
remove the screw and the ignitor. Clean the ignitor assembly with an emery
cloth.
CAUTION: Due to
high voltage on
the spark wire and
electrode, do not
touch when ener-
gized. See Hazard
Levels, page 2.
FIGURE 25 -
Ignitor showing
required Spark
Gap measurement
1/8 inch
(3.2mm)
FIGURE 24 -
DSI Integrated
Control Module
(Circuit Board)
Only replaceable
part is a Type
ATC or ATO 3
amp fuse (Color
Code Violet), P/N
201685
10.1.4 Ignition
System
DSI Integrated Control Module (circuit board) - See FIGURE 24. The mod-
ule monitors the operation of the heater including ignition. The only replace-
able component is the 3 amp Type ATC or ATO fuse. If the fuse is blown, the
problem is most likely an external overload.
Correct the problem and replace the
fuse.
Do not attempt to disassemble the con-
trol module. However, each heating sea-
son check the lead wires for insulation
deterioration and good connections.
Size 400 has one control module; Size
800 has two control modules; and Size
1200 has three control modules.
Proper operation of the direct spark igni-
tion system requires a minimum flame
signal of 1.0 microamps as measured by
a microampmeter.
Burner Orifice(s) A burner orifice usually only needs to be replaced when installing a gas conver-
sion kit. If ordering replacement orifice(s) only, give BTUH content and specific
gravity of gas, as well as the model and serial number of the heater. When
removing or replacing a burner orifice, use two wrenches being careful not to
damage the venturi tube and/or the bracket.
Instructions to Re-Install the Burner (Refer to FIGURE 23.)
1. Attach the Burner Assembly - Holding the venturi tube, slide the entire
burner assembly into position. Align the supports on the bottom with the
slots in the burner shield; sliding the supports into the slots. On the top, re-
attach each burner body support to the burner shield.
2. Attach the Gas Train - Slide the gas train so that the orifice adapter is
through the bracket. Fasten the gas train to the bracket with the locking
nut. Install the gas orifice. Re-connect the wires to the gas valve. Re-
connect the union(s) inside of the control compartment.
3. Reconnect the gas supply at the union outside of the cabinet. Turn on the
gas supply and leak test the connections with leak detecting solution.
4. Close the access panel.
5. Turn on the electric. Check for proper operation.
Re-Install the Burner
For further information and check out procedure on the direct spark ignition
system, refer to Paragraph 8 and the Troubleshooting Flow Chart in Paragraph
10.
Spark gap must be maintained to 1/8”. See FIGURE 25.
IMPORTANT: When re-assembling, the brown ground wire must remain
attached to the ignitor.
Ignitor