Space Ray RSTP Series - Manual (Page 35)

Form 43206000
-34- Sept 2011
21.4)
IGNITION SYSTEM CHECKS
TO CHECK TO CHECK TO CHECK TO CHECK IGNITION CABLE IGNITION CABLE IGNITION CABLE IGNITION CABLE....
a. Make sure that the ignition cable does not touch any metal surface.
b.
Make sure that connections to the stud terminal and the igniter/sensor are clean and tight.
c.
Make sure that the ignition cable provides good electrical continuity.
TO CHECK
TO CHECK TO CHECK TO CHECK IGNITION SYSTEM GROUNDING IGNITION SYSTEM GROUNDING IGNITION SYSTEM GROUNDING IGNITION SYSTEM GROUNDING....
(Nuisance shutdowns are often caused by a poor or erratic ground.) A common ground is required for the module,
igniter, flame sensor and main burner.
a.
Check for good metal-to-metal contact between the igniter bracket and the main burner.
b.
Check the ground lead from the GND (BURNER) terminal on the module to the igniter bracket. Make sure
connections are clean and tight. If the wire is damaged or deteriorated, replace it.
c. Replace igniter/sensor with factory replacement part if insulator is cracked.
TO CHECK
TO CHECK TO CHECK TO CHECK SPARK IGNITION CIRCUIT SPARK IGNITION CIRCUIT SPARK IGNITION CIRCUIT SPARK IGNITION CIRCUIT....
▲WARNING: ▲WARNING: ▲WARNING: ▲WARNING: The ignition circuit generates a 20,000 Volt open circuit and electrical shock can result.
a.
Check ignition cable.
b. Check external fuse on the module.
c. Verify power (24V) at module input terminals and output terminal to gas valve.
d. Replace spark module if fuse and power are OK.
TO CHECK FLAME SENSOR CIRCUIT. TO CHECK FLAME SENSOR CIRCUIT. TO CHECK FLAME SENSOR CIRCUIT. TO CHECK FLAME SENSOR CIRCUIT.
a.
Turn off heater at thermostat.
b. Connect a meter (dc microammeter scale) in series with the ground lead as shown in the diagram. Connect
the meter as follows:
• Disconnect the ground lead at the electronic control.
• Connect the black (negative) meter lead to the electronic control GND terminal.
• Connect the red (positive) meter lead to the free end of the ground lead.
c. Restart the system and read the meter. The flame sensor current must be steady and measure at least 1.5
microamps.
d. If the meter reads less than the minimum or if reading is unsteady:
• Make sure burner flame is capable of providing a good rectification signal.
• Make sure fasteners securing igniter/sensor are tightened to assure correct positions. DO NOT DO NOT DO NOT DO NOT relocate
igniter/sensor.
• Check for excessive (over 1000ºF) temperature at ceramic insulator on flame sensor. Excessive
temperature can cause short to ground. DO NOT
DO NOT DO NOT DO NOT relocate igniter/sensor.
• Check for cracked ceramic insulator, which can cause short to ground, and replace sensor if necessary.
• Make sure that electrical connections are clean and tight. Replace damaged wire.
e. If the meter reads below “0” on the scale, meter leads are reversed. Disconnect power and reconnect meter
leads for proper polarity.
f. Remove microammeter. Return system to normal operation.