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Get Your Parts Fast! Place your order before 4PM EST and it will ship on the same or next business day.
The Series 35-75 controls are designed to perform many gas-fired 120 VAC appliance functions in a single control resulting in lower system cost. The Series 35-75 monitors the demand for heat, ignites and monitors the flame during heating.
The microprocessor circuit design provides precise, repeatable timing sequences for ignition times and purge times as well as multiple tries for ignition. The control will accommodate a variety of ignitor models up to 5 Amps.
| Input Power Voltage Current | Control: 102 to 138 VAC 50/60 Hz (Class 2 Transformer) Line: 120 VAC Current: 100 mA max. @ 120 VAC at 25 deg. C (Control only) |
| Output (Contact Ratings) | Gas Valve: 1.5 A max. @ 120 VAC Hot Surface Element: 5.0 A max. @ 120 VAC |
| Operating Temperatures | -40 to +176 deg. F (-40 to +80 deg. C) |
| Flame Sense Voltage | 50% of line voltage minimum |
| Flame Sensitivity | 1.0 mA minimum |
| Types of Gas | Natural, LP, or manufactured |
| ignitor | 120 VAC hot surface ignitors up to 5 A |
| Moisture Resistance | Open Board: Conformal coated to operate non-condensing to 95% R.H. Care must be taken to protect module from direct exposure to water Potted: To operate up to 100% R.H |
| Size (LxWxH) | See Figures 2a or 2b |
| Weight | Open 2.3 oz Board:Potted: 6.1 oz |
CONTROL CONFIGURATION | |
PACKAGING | Potted |
HEAT-UP TIME AND ignitor OPTIONS | 20 Seconds, Norton 271 |
Tries for Ignition | Three Tries - Remote Sense without Automatic Reset |
Pre-Purge | None |
Inter-Purge | 30 Seconds |
Trial for Ignition | 7 Seconds |
Upon applying power (120 volts), the control will reset, perform a self-check routine, monitor the flame sense input to verify no flame is present and enter the thermostat scan state.
When a call for heat is received from the thermostat supplying 120 volts to the TH terminal, the control will perform a self-check routine, the safety timing sequence and flame check. After an optional pre-purge period, the hot surface ignitor is energized for a heat-up period, followed by the gas valve for the trial for ignition (TFI) period. If flame is detected during purge, the gas valve will remain de-energized.
When a valid flame is detected during the TFI period, the ignitor is de-activated and the gas valve remains energized. The thermostat and main burner flame are constantly monitored to assure that the system operates properly. The control will continuously monitor the flame during the heating period. (If flame is lost, the gas valve will be shut off within 0.8 seconds.) When the thermostat is satisfied and the demand for heat ends, the gas valve is de-energized imme- diately.
The robust design of our gas ignition controls is demonstrated by their ability to respond to flame failures in a safe manner and provide re-ignition options for the appliance designer
Should the main burner fail to light or the flame is not detected during the TFI, the control will lockout. The gas valve will be turned off immediately. With the 1 hour reset option, if the thermostat is still calling for heat, the control will automatically reset and attempt a new TFI after one hour.
Should the main burner fail to light or the flame is not detected during the first TFI, the gas valve is de-energized and the control performs an optional inter-purge delay before attempting another TFI. The control will attempt 2 additional TFIs before locking out. In lockout, the gas valve will be turned off immediately. With the 1 hour reset option, if the thermostat is still calling for heat, the control will automatically reset and attempt a new TFI after one hour.
If the established flame signal is lost while the burner is operating, the control will respond within 0.8 seconds and de-energize the gas valve. The control performs an optional inter-purge delay before attempting a new TFI. If the burner does not re-light, the control will lockout as previously described in the 'Failure to Light - Lockout' section. Multi-try models will make 2 more attempts to light the burner. If flame is re-established, normal operation resumes.
After single or multiple attempts to light the burner have failed or flame is not established, the control automatically enters lockout mode. The control will not open the gas valve unless there is intervention by the user. See Lockout Recovery.
Recovery from lockout requires a manual reset by either resetting the thermostat or by removing the 120 volts for a period of 5 seconds.
