Reznor F25-165, F200-250, F 300-400, B 300, B 40 Installation Manual
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Form CP-F/B-IGN (Version B)
Obsoletes Form CP-F/B-IGN (Version A)
Ignition Conversion Kit Instructions
Apples to: Models F and B
Ignition Conversion Kits to Convert Models F and B with Standing Pilot to
Spark-Ignited, Intermittent Safety Pilot System With or Without Lockout
WARNING: Improper installation, adjustment, alteration, service or maintenance can
cause property damage, injury, or death. Read the installation instructions thoroughly
before installing this equipment.
Description/
Application
IMPORTANT
NOTE: These
are not gas
conversion
kits, ignition
conversion only.
NOTE: A unit with a
vent damper (Option
AV7) requires P/N
257010, an ignition
controller for
intermittent spark
pilot with lockout
The ignition conversion kits in this form are for Model F and Model B unit heaters equipped
with standing pilot and single stage gas valve. Before beginning conversion, determine
that your kit is compatible with your heater. Spark-ignited, intermittent safety pilot systems
without lockout are not available with propane gas; propane gas requires 100% lockout.
IGNITION CONVERSION KIT SELECTION CHART for Models F and B
Kits to convert from standing pilot to spark-
ignited, intermittent recycling safety pilot
Model Gas Type Kit P/N Model Gas Type Kit P/N
F/B 25-165
F/B 200-250 100526 F/B 200-250 100529
F 300-400; B 300 100527 F 300-400; B 300 100530
B 400 102348 B 400 102349
(without lockout)
100525 F/B 25-165
Natural
See pages 7-8 for a parts
listing of each kit.
Kits to convert from standing pilot to
spark-ignited, intermittent safety
with 100% lockout
100528
Natural
F/B 25-200
F 250-400; B 250-300 100532
B 400 102350
Propane
100531
(Option AH3)
WARNING: This ignition conversion kit is to be installed by a qualied agency in
accordance with these instructions and in compliance with all codes and requirements
of authorities having jurisdiction. Failure to follow instructions could result in death,
serious injury, and or property damage. The qualied agency performing this work
assumes responsibility for this installation.
Instructions for
Installing Ignition
Conversion Kit
1. Turn off the gas supply at a shutoff valve upstream of the combination valve and turn
off the electrical supply.
2. Change Combination Valve
Disconnect the main gas line, the wires and the pilot tubing from the valve and remove the
valve. Install the valve provided with the kit being sure that the gas ow through the valve
is in the proper direction and that the valve is in an allowable orientation. Follow the valve
manufacturer’s instructions and, if applicable, the replacement valve kit instructions for
details on installing the valve.
Reconnect the main gas line. Do not reconnect the pilot tubing or wires at this time.
WARNING: The operating valve is the primary safety shutoff.
The gas supply line must be free of dirt or scale before connecting the unit to ensure positive closure.
3. Install the Ignition Controller (See FIGURE 1 for location.)
Attach the ignition controller mounting bracket to the rear of the heater using the holes in
the cabinet and the #10x3/8” screws in the kit. Position the ignition controller on the bracket
with the wire terminals across the bottom. Use the #8x5/8” screws to attach the ignition
controller to the bracket.
Form CP-F/B-IGN, P/N100550 (Rev 3), Page 1
Instructions
(cont’d)
Replacement Controller, either
P/N 257009 or 257010
FIGURE 1 - Ignition
Control Location
FIGURE 2 - Bottom
Access Panel Open
FIGURE 3 - Pilot
Spark Gap
Transformer
Ignition
Terminal Strip
4. Change Pilot
Remove the two screws located at the rear bottom of the
heater that retain the bottom access panel. Allow the bottom panel to hinge down from the front.
The bottom of the pilot is now visible (See FIGURE 4A,
below.) Remove the screws holding the match-lit pilot
and remove the pilot assembly.
The match-lit pilot consisted of the pilot with hood and the ame-sensing thermocouple.
The new spark pilot assembly has a hooded pilot, a ame sensor rod, and an ignitor. Before
installing the pilot, verify the correct spark gap between the pilot hood and the ignitor. See
FIGURE 3. The spark gap must be maintained at .100”. The spark gap is set by the manufacturer and should be correct, but it is wise to recheck before installation. If adjustment is
required, hold the ceramic base with a pair of pliers while adjusting the rod.
Install the spark pilot assembly being sure that the pilot burner is extended toward the
burner tube. Be sure to include the pilot shield that is used only with the spark pilot assembly. (See FIGURES 4A, 4B, and 4C.)
Controller
location
Valve
FIGURE 4A - (1) Remove the
match-lit pilot assembly.
FIGURE 4C (3) Spark Pilot
Installed
Form CP-F/B-IGN, Page 2
FIGURE 4B - (2) Install the pilot shield and spark pilot
assembly with pilot burner extending toward the
burner tube.
Pilot
Shield
Pilot
Burner
Pilot Shield
Pilot Assembly with Flame Probe
CAUTION:
Control, P/N
257010, with
lockout is
required with
a vent damper.
The controller
has a safety
feature that
once it is used
with a vent
damper, it
will no longer
operate a unit
without a vent
damper.
Attach one end of the ame sensor wire (150°C red silicone wire) to the ame probe on
the pilot assembly. Attach the other end of the ame sensor wire to Terminal “SENSE” on
the ignition controller. Attach the free end of the high tension spark wire (wire attached to
the ignitor on the pilot assembly) to the spike (“SPARK”) terminal on the ignition controller.
Push the wire rmly so that the spike is fully inserted and the wire secure.
Connect the pilot tubing to the gas valve. Position the tubing, high tension wire and ame
sensor wire in a location where they will not interfere with gas or air entering the burner or
be pinched by the bottom panel. Do not wrap the high tension wire and the ame sensor
wire together. The tubing and the wires may be routed through the opening for the manifold
pipe.
5. Wiring (Follow the appropriate new wiring diagram label in the kit.)
Remove the outer left heater side panel (left when facing the rear of the heater), revealing
the wiring.
Using the wires on the heater and the new wire assemblies in the kit, make the connections according to the instructions below and the new wiring diagram label in the kit.
(a) Replace transformer – Models with standard 115 volt supply require a transformer
change when converting to spark ignition. Models with optional 208, 230 or 460 supply voltage do not require a transformer change. If your unit requires a transformer
change, disconnect the wires from the transformer and remove the transformer from
the heater. (See FIGURE 1.) To install the new transformer, through the “large” hole in
the side panel for mounting the transformer, slide the Tinnerman clips over the transformer screw holes. Insert the new transformer in the mounting hole and fasten with
the 1-3/4” long screws included in the kit. Reconnect the brown wire from the terminal
strip and the line voltage yellow and black wires. Do not reconnect the blue wire.
(b) ECO (Energy Cutoff) Wiring – The ECO wiring on a unit with a standard pilot is
routed through the rear of the heater. When the unit is converted to spark, the ECO
wiring must be re-routed through the side panel. Follow these instructions to re-route
and reconnect the ECO wires (Refer to Wiring Diagram on page 6):
(1) On the rear of the heater (fan panel), remove the Heyco device (strain relief bush-
ing) that holds the two red wires going through the fan panel. (These wires were
disconnected from the gas valve in Step 2.)
(2) On the side of the heater, remove the small fan/limit control access panel (See
FIGURE 5). Reach through the access hole and pull both red wires completely
through the fan panel into the heater where the ECO is located. One of these
wires will be used on the converted heater, but the other must be replaced with
the longer red wire in the conversion kit. Carefully disconnect one of the wires
from the ECO control and discard that wire. The red ECO wire in the kit has two
different terminals. Connect the end with the straight insulated terminal to the
ECO control.
(3) Remove the Heyco device (See FIGURE 5) from the inner side panel. Add the two
red ECO wires to the fan and limit wires that are already there. Using pliers, rein-
FIGURE 5 - Outer
Side Panel Removed
Showing Access to
ECO Wiring through
the Fan/Limit
Control Access
Panel (panel is
removed)
Add the ECO wires
to the Heyco device
holding the fan and
Limit
Control
Fan
Control
limit wires.
ECO Device
FIGURE 6 - Rear View of
a Model F showing ECO
Wire Conguration after
Conversion
Fan
Control
Form CP-F/B-IGN, P/N100550 (Rev 3), Page 3
ECO
Device
Limit
Control
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