Robertshaw 780U-Ds20 Universal Direct Spark Ignition Module

Description

ROBERTSHAW 780U-DS20 UNIVERSAL DIRECT SPARK IGNITION MODULE. ✔ Universal24V Direct Spark Ignition Module. Spark Gap 0.150 in ± 0.050 in (3.8 ± 1.2 mm). Input Current 0.25 A + valve (2.0 A max). No spark present at the igniter. Burner lights but shuts down shortly after ignition. 780U-DS20 ROBERTSHAW Universal Direct Spark Ignition Module – 24V Replacement Control The 780U-DS20 Universal Direct Spark Ignition Module by Robertshaw is a highly configurable 24-volt ignition control designed to replace 700+ OEM ignition modules. With up to 32 preloaded configurations, this module dramatically simplifies inventory while ensuring fast, reliable installation across a wide range of gas-fired equipment. Engineered for gas furnaces, boilers, water heaters, unit heaters, and commercial cooking equipment, the 780U-DS20 delivers consistent ignition performance, advanced diagnostics, and broad compatibility with both Natural Gas and LP systems. ✅ Key Features & Benefits ✔ Universal 24V Direct Spark Ignition Module ✔ Replaces 700+ OEM ignition controls ✔ Up to 32 selectable configurations ✔ Supports single-rod (local) and two-rod (remote) flame sensing ✔ Compatible with Natural Gas and LP Gas ✔ High-energy 15 kV spark output for reliable ignition ✔ LED diagnostics for flame strength, system status, and fault codes ✔ Vent damper ready (Molex 03-06-2061 connection) ✔ Auto restart after 60 minutes ✔ Designed for residential and commercial applications 📋 Technical Specifications Specification Details Part Number 780U-DS20 Control Type Universal Direct Spark Ignition Input Voltage 24 VAC ±4 VAC Frequency 50 / 60 Hz Input Current 0.25 A + valve (2.0 A max) High Voltage Output 15 kV (50 pF load) Spark Gap 0.150 in ± 0.050 in (3.8 ± 1.2 mm) Flame Sense Current 0.5 µA minimum Flame Failure Response 2 seconds max Flame Failure Re-Ignition ≤ 1 second Auto Restart Time 60 minutes Valve Current Rating 2.0 A Pilot / 2.0 A Main @ 24 VAC Operating Temperature -40°F to 176°F (-40°C to 80°C) Humidity Rating Up to 95% RH (non-condensing) 🔁 Replacement & Cross Reference The 780U-DS20 is a direct universal replacement for ignition modules from multiple manufacturers: OEM Manufacturer Series / Part Number Baso C107U Honeywell / Resideo S87 White-Rodgers 50D50-842 Fenwal 35-60, 35-61, 35-63 Johnson Controls G60, G65, G67, G77 ⚠️ Common Symptoms / When to Replace Burner fails to ignite or ignites intermittently No spark present at the igniter Burner lights but shuts down shortly after ignition Lockouts or repeated ignition retries Diagnostic LED indicates ignition or flame-sense fault ❓ Frequently Asked Questions (FAQ) Q: How many ignition modules does the 780U-DS20 replace? A: It replaces 700+ OEM part numbers, making it one of the most versatile ignition modules available. Q: Can it be used with LP gas? A: Yes. It supports Natural Gas and LP Gas applications. Q: Does it support remote flame sensing? A: Yes. It supports both single-rod and two-rod flame sensing. Q: Is a vent damper supported? A: Yes. A vent damper can be connected using Molex 03-06-2061. Q: What applications is it designed for? A: Gas furnaces, boilers, water heaters, unit heaters, and commercial cooking equipment. 🛒 Shopping Tips Always confirm 24V control voltage before ordering Match flame-sense configuration (single vs. two-rod) Use LED diagnostics to verify proper setup during installation Ideal universal replacement to reduce truck stock and downtime Professional installation recommended for gas-fired equipment