Reznor SHH (Indoor PreevA) Unit Installation Manual - Manual (Page 61)

Form I-PDH/SDH/PEH/SHH/PXH, Page 61
FIGURE 53 -
Integrated
Control Module
(Circuit Board),
P/N 260252,
for Deep
Modulation
Options AG58
and D12G
3-Character Display
ID Plug
(unique by
size and
type of gas)
IMPORTANT: The control
module is P/N 260252 for
all sizes of Model SHH
heat sections. However,
the ID plug on each board
is unique for each size and
type of gas. A replacement
board will require either
a new ID plug or reuse of
the ID plug from the board
being replaced. Except for the replaceable parts shown, do not attempt to disassemble either board.
Each heating season, check the lead wires for insulation deterioration and good con-
nections.
If replacement is required, these boards must be replaced with identical parts.
The control has a built-in, self-diagnostic capability. The control continuously monitors
its own operation and the operation of the heat section including direct spark ignition,
safety and modulating valves, and venter motor speed. The 3-digit display on the con-
trol indicates the current system state, warnings, failures, and test modes.
LED 3-Character Display (displayed on power up)
Display Info (example only) Description
SHH Furnace series or model name
350 Heat Section Size
nAt or LP Fuel type
1.01 Software version
NOTE: Operating and
Lockout Error Codes
displayed on the ignition
controller 3-character
display ( FIGURE 53) are
listed in Troubleshooting
Paragraph in the
Operation/Maintenance/
Service Manual, Form
O-PREEVA.
FIGURE 54 - Spark Ignition Board, P/N 257975, is located on the
removable shield at the end of the burner.
CAUTION: Due to high voltage on the spark
wire and electrode, do not touch when
energized. See Hazard Levels, page 2.
8.4.3 Ignitor Location Proper location of the ignitor to the burner is shown in FIGURE 55A. Ignitor spark gap
is shown in FIGURE 55B. The ignitor is the same for all gas control options.
.436 (centerline of ignitor to top of ribbon)
1/8 inch
(3.2mm)
FIGURE 55A - Ignitor Location
FIGURE 55B - Ignitor Spark Gap