resideo S8600B - User Manual

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INSTALLATION INSTRUCTIONS

69-1954-05

S8600B,C,H,M; S8610B,C,H,M;

S8670D,E,J,K Intermittent Pilot Gas

Ignition Control

APPLICATION

The S8600 family of ignition controls provide ignition sequence, flame monitoring and safety shutoff for intermittent

pilot gas fired heating appliances. These controls provide flame sense and operating sequences suitable for the

application.

Table 1 describes the main features of each available model.

All models provide:

• Natural or LP gas.

• Pilot burner ignition using a high voltage spark.

• Flame rectification circuit to monitor flame presence.

• Monitoring of 24 Vac, pilot, and main gas valve.

• LED indicator for flame presence/strength and

system status/errors.

• Connections for flame reading via standard micro-

ammeter or voltmeter.

SPECIFICATIONS

Control Voltage: 24V (18-30 Vac) 50/60 Hz

Current Draw: 0.1 A plus valve load @ 24Vac

Trial for Ignition: Dependant on model ordered.

Prepurge: See Table 1.

Ignition Sequence: See figures 10 and 11.

Retry Delay: 5 minutes (C, M, E, and K models only)

Flame Failure Response Time: 2 seconds maximum

LED: The green status LED provides system status, error

codes, and flame strength indication when in run

mode.

Gas Control: Resideo models VR8204 and VR8304

Operating Temperature:

Minimum ambient temperature rating is -40°F

(-40°C).

Maximum ambient rating for S8600 used with 1.0A main

valve is 175°F (79°C).

Maximum ambient rating for S8610 and S8670 used with

2.0A main valve is 165°F (74°C).

Relative humidity: 0% to 95% noncondensing

Approvals: UL 60730-1, UL60730-2-5

Table 1. Intermittent Pilot Ignition Models.

Model Igniter-Sensor Type Valve Current Rating @ 24 Vac Prepurge Timing Ignition Sequence Type

Trial for Pilot Ignition timing dependent on model ordered

S8600B

Separate

Separate: two rod; remote flame sensing.

1.0 A Pilot and 1.0 A Main None Lockout

S8600C Separate 1.0 A Pilot and 1.0 A Main None Continuous Retry

S8600H

Combination

Combination: one rod; local flame sensing.

1.0 A Pilot and 1.0 A Main None Lockout

S8600M Combination 1.0 A Pilot and 1.0 A Main None Continuous Retry

S8610B Separate 1.0 A Pilot and 2.0 A Main None Lockout

S8610C Separate 1.0 A Pilot and 2.0 A Main None Continuous Retry

S8610H Combination 1.0 A Pilot and 2.0 A Main None Lockout

S8610M Separate 1.0 A Pilot and 2.0 A Main None Continuous Retry

S8670D Combination 1.0 A Pilot and 2.0 A Main 30 seconds Lockout

S8670E Combination 1.0 A Pilot and 2.0 A Main 30 seconds Continuous Retry

S8670J Separate 1.0 A Pilot and 2.0 A Main 30 seconds Lockout

S8670K Separate 1.0 A Pilot and 2.0 A Main 30 seconds Continuous Retry

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The S8600B,C,H,M; S8610B,C,H,M; S8670D,E,J,K Intermittent Pilot Gas Ignition Control is a crucial component for gas-fired heating appliances, providing comprehensive ignition sequence management, flame monitoring, and safety shutoff. This family of controls is designed to ensure reliable and safe operation of heating systems by managing the pilot ignition process and continuously monitoring the flame.

Function Description:

The primary function of these controls is to initiate and supervise the ignition of a pilot flame, which then ignites the main burner in gas-fired heating appliances. They achieve this through a high-voltage spark for pilot burner ignition and a flame rectification circuit to confirm the presence of the flame. The controls also incorporate safety features, including a safety shutoff mechanism that activates if the pilot flame is not established or is lost during operation.

Different models within this family offer variations in their ignition sequence and retry capabilities:

Lockout Models (S8600B,H; S8610B,H; S8670D,J): These models provide a single trial for pilot ignition. If the pilot flame is not lit and sensed within the specified ignition trial time, the control shuts off the pilot valve (100% shutoff) and enters a lockout state. The system remains in lockout until power is cycled by the thermostat or by removing and restoring system power.
Continuous Retry Models (S8600C,M; S8610C,M; S8670E,J): These models offer multiple trials for ignition. If the pilot is not lit or sensed within the ignition trial time, the control shuts off the spark and pilot gas, waits for a 5-minute delay, and then initiates another ignition sequence. This pattern continues until the pilot lights and is proved, or until the "Call for Heat" ends. The 5-minute delay can be bypassed by cycling the system thermostat or power.

Some S8670 models also include a prepurge phase for fan-assisted combustion systems. In these systems, the combustion air blower starts on a call for heat, and upon proof of airflow, the S8670 module initiates a 30-second delay for system prepurge before starting the trial for pilot ignition. For atmospheric systems, the "Call for Heat" directly energizes the module, leading to the trial for pilot ignition.

All models continuously monitor the pilot flame during main burner operation. If the pilot flame goes out, the control senses the loss of flame and shuts off both the pilot and main valve relays, stopping gas flow to both burners.

Important Technical Specifications:

Control Voltage: 24V (18-30 Vac) 50/60 Hz.
Current Draw: 0.1 A plus valve load @ 24Vac.
Valve Current Rating @ 24 Vac:
- S8600 models: 1.0 A Pilot and 1.0 A Main.
- S8610 and S8670 models: 1.0 A Pilot and 2.0 A Main.
Trial for Ignition: Dependent on the specific model ordered (e.g., 90 seconds for S8670 models).
Prepurge Timing: None for S8600/S8610 models; 30 seconds for S8670 models.
Ignition Sequence Type: Lockout or Continuous Retry, depending on the model.
Retry Delay: 5 minutes (for C, M, E, and K models only).
Flame Failure Response Time: 2 seconds maximum.
Operating Temperature:
- Minimum ambient temperature rating: -40°F (-40°C).
- Maximum ambient rating for S8600 with 1.0A main valve: 175°F (79°C).
- Maximum ambient rating for S8610 and S8670 with 2.0A main valve: 165°F (74°C).
Relative Humidity: 0% to 95% noncondensing.
Approvals: UL 60730-1, UL60730-2-5.
Igniter-Sensor Type:
- "Separate" models (e.g., S8600B, S8610B, S8670J,K) use two rods for remote flame sensing.
- "Combination" models (e.g., S8600H, S8610H, S8670D,E) use one rod for local flame sensing.
Gas Type: Suitable for Natural or LP gas.
Flame Current Measurement: The device provides connections for measuring flame current using a standard micro-ammeter or voltmeter. A steady 1µAmp DC or 1V DC minimum is recommended for pilot flame current.

Usage Features:

LED Indicator: A green status LED provides visual feedback on system status, error codes, and flame strength when in run mode. This is a key diagnostic tool for technicians. Flash codes indicate specific issues such as retry, recycle, flame out of sequence, internal error, flame rod shorted, or low input voltage.
Diagnostic Connections: Dedicated connections (FLAME probes) allow for direct measurement of flame current in μAmp DC or VDC, aiding in troubleshooting and ensuring proper flame sensing.
Robust Design: The controls are designed to operate in various environments, but specific precautions are outlined for challenging conditions such as frequent cycling, water/steam cleaning, high humidity, corrosive chemicals, and dust/grease accumulation. For severe environments, a NEMA 4 enclosure is recommended for the ignition module.
Compatibility: Designed to work with Resideo gas control models VR8204 and VR8304.
Wiring Flexibility: Detailed wiring diagrams are provided for different system configurations, including atmospheric burners and power-assisted combustion systems, with options for remote or local flame sensing.

Maintenance Features:

Troubleshooting Guide: The manual includes a comprehensive troubleshooting guide, starting with LED status codes and progressing to detailed checks of the ignition system, pilot and main burner lightoff, and gas leak tests.
Ignition System Checks: Specific steps are provided to check the ignition cable, ignition system grounding, and spark ignition circuit, which are common sources of nuisance shutdowns.
Flame Inspection: Guidance on identifying unsatisfactory pilot flames (e.g., small blue, lazy yellow, waving blue, noisy lifting blowing, hard sharp) and their causes (e.g., clogged orifices, dirty lint screens, excessive draft, high gas pressure) helps in diagnosing and correcting pilot flame issues.
Regular Maintenance: For applications with frequent cycling, a monthly checkout is recommended to prevent premature control failure.
Component Replacement: The ignition module cannot be repaired and must be replaced if it malfunctions. Similarly, damaged wires, cracked ceramic insulators, or faulty igniter-sensors should be replaced.
Gas Leak Test: Instructions for performing a gas leak test downstream of the gas control are provided to ensure system integrity and safety after installation or service.
Professional Service: Emphasizes that installation and service should only be performed by trained, experienced service technicians.