Description
The Fenwal 35-725911-117 is a 120 VAC microprocessor-based direct spark ignition (DSI) control that provides reliable, repeatable burner ignition for gas-fired equipment. Factory-configured for a three-try, 15-second trial-for-ignition sequence, it streamlines installation with compact packaging and multi-pin connector wiring.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Fenwal |
| Category |
Heating & Ignition Parts |
| Part Number |
35-725911-117 |
| Subcategory |
Ignition Modules |
| Input Power |
102–138 VAC, 50/60 Hz |
| Input Current |
50 mA @ 120 VAC (typ.) |
| Ignition Type |
Direct Spark Ignition (DSI), microprocessor-based |
| Ignition Trials |
3-try (this model); family supports 1 or 3 |
| Trial-for-Ignition Time |
15 seconds (this model); family supports 4/7/10/15 s |
| Reset Method |
Thermostat/power-off reset |
| Flame Sense |
Single spark & sense or remote sense; ≥ 1.0 µA required |
| Flame Failure Response |
≤ 0.8 s |
| Gas Valve Rating |
1.5 A @ 120 VAC |
| Gas Types |
Natural, LP, manufactured gas |
| Spark Rate |
Line frequency (50/60 Hz) |
| Moisture Resistance |
Conformal coated to 95% RH; potted versions to 100% RH |
| Mounting Options |
Open board with stand-offs or potted module |
| Diagnostics |
On-board LED (fault codes) + flame current test pins |
| Certifications |
CSA/ANSI (Automatic Ignition Systems) |
| Shipping Weight |
3.0 lb |
| Weight |
2.3 oz (integral stand-offs) / 6.1 oz (potted), module only |
Information About 35-725911-117
The 35-725911-117 is part of Fenwal’s Series 35-72 family of 120 VAC DSI controls for natural, LP, and manufactured gas appliances up to 400 K BTU. It supports common mounting formats (open board with stand-offs or potted) and offers thermostat/power-off lockout reset. The controller’s microprocessor manages pre-/inter-purge timing, multiple ignition attempts, and flame sensing, while on-board diagnostics and flame-current test pins simplify commissioning and service. Typical applications include commercial cooking equipment, ceramic/black-body infrared heaters, and construction heaters.
Key Features:
- 120 VAC DSI Control: Direct spark ignition for gas valves and burners on line-voltage appliances.
- Configured Sequence (This Model): 3-try ignition with 15 s trial-for-ignition for dependable light-off.
- Flexible Mounting: Open board with stand-offs or potted versions for harsh environments.
- Quick Wiring: Multi-pin connector speeds assembly and reduces wiring errors.
- Serviceability: Diagnostic LED with error codes and flame-current test pins for fast troubleshooting.
- Polarity Insensitive: Reduces risk of miswiring on installation.
- Certified Design: CSA/ANSI design certification for automatic ignition systems.
The 35-725911-117 delivers the reliability and precision required for commercial and industrial gas ignition control.
