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S89E,F DIRECT SPARK IGNITION CONTROL MODULE
instructions, and service procedures for their appliance. If the
manufacturer instructions are not available, use the general
guidelines that follow.
Mount the S89
Select a convenient location on the burner or furnace chassis
or cabinet, protected from moisture due to splashing, dripping,
or condensation. Allow room to easily reach the S89 terminals
for wiring and servicing. Do not exceed the ratings given in the
Specifications section.
The S89 may be mounted in any position. See Fig. 1 for
mounting dimensions. Mount with 1 in. (25 mm) long, no. 6-32
machine screws or no. 8 sheet metal screws. Fasten securely.
Mount Auxiliary Controls
Mount the spark generator, igniter, flame sensor, thermostat,
transformer, gas control, and any other auxiliary controls
according the control manufacturer instructions.
WIRING
CAUTION
Equipment Damage Hazard.
Can cause equipment malfunction or damage.
1. The sensor leadwire must be no more than 3 ft
(0.9m) long. Do not allow the wire to touch
grounded metal surfaces.
2. A common ground is required for the S89, the spark
ignitor and the main burner. The 24V (GND)
terminal internally grounds one side of the
transformer. Auxiliary controls or limits must be in
the ungrounded leg.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect the power supply before beginning wiring.
More than one disconnect may be required.
Use wiring diagrams and instructions provided by the
appliance manufacturer, if available. Otherwise, follow the
general procedures and diagrams outlined below.
All wiring must comply with all applicable electrical codes and
ordinances.
1. Make sure the transformer has adequate power (VA)
rating. See Table 1 in Specifications section.
2. If you are replacing an S89 that was used with an
external valve on delay timer, you must disconnect the
external timer and use an S89F to provide the delay
function. External timers cannot be used with either
S89E or S89F controllers because the safety circuit in
68-0066—4
the controls may repeatedly set the timer to zero,
preventing burner start. Always disconnect the external
timer when using an S89E or F. To disconnect the timer:
a. Turn off power.
b. Cut the two leadwires at the external timer.
c. Strip the ends of the wires 1/2 in. (13 mm) and
connect with a solderless connector.
d. Restore power.
3. Wire system components and S89 as shown in Fig. 2
and 3. Refer to appliance manufacturer instructions for
connections to other auxiliary controls.
4. Make sure the L1 (Hot) and L2 (Ground) leads are
connected to the right leads. If they are reversed, the
S89 will not detect the flame and will go into safety
lockout.
5. Connect spark igniter, flame sensor, main burner, and
S89 to a common ground. Use thermoplastic insulated
wire with a minimum rating of 221°F (105°C) for the
ground wire. Connect the ground wire as follows:
a. Connect one end of the ground wire to the
quick-connect GND (burner) terminal on the S89,
using a 1/4 in. (6 mm) quick-connect (AMP 41772 or
equivalent).
b. Strip the other end of the wire and fasten it under the
igniter bracket mounting screw.
c. If necessary, install a shield to protect the wire from
radiant heat generated by the burner.
d. The burner serves as the common ground. If
metal-to-metal contact between the burner and the
appliance cabinet is poor, run a lead from the burner
to the cabinet. The cabinet must be earth-grounded.
START-UP AND CHECKOUT
If this is a replacement application, refer to the specific
instructions provided by the heating appliance manufacturer
(if available). Also, since the auxiliary controls used on any
system may differ, refer to the control manufacturer
instructions for start-up and checkout procedures for other
system components.
Perform Gas Leak Test
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
1. Never use a flame to check for gas leaks, only a
soap and water solution.
2. Test for gas leaks whenever work is done on a gas
system.
3. Soap and water must not touch the S89.
With the main burner in operation, paint the pipe joints and
gas control gasket edges with a rich soap and water solution.
Bubbles indicate a gas leak. To stop the leak, tighten joints
and screws, or replace the gas control. Never use a flame to
check for gas leaks.
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