HONEYWELL RA890G1260 | RA890G1336 Combustion Controller

Description

🔹 Product Introduction

The HONEYWELL RA890G series is a legacy Protectorelay® flame safeguard and combustion control product family used for burner and combustion equipment. It provides flame supervision and safety control functions for industrial burner applications.

For the two models listed here, RA890G1260 is a 120 VAC, 50/60 Hz model with a 3.0-second flame-failure response time and 15-second safety-switch timing. RA890G1336 is also a 120 VAC, 50/60 Hz model with a 3-second flame-failure response time and 15-second safety-switch timing. Honeywell’s current cross-reference identifies RA890G1336 with RM7890A1015 and R7849A1023 as replacement components.

The RA890 line has reached end-of-life, with Honeywell providing replacement paths based on the RM/EC7800 series. For RA890G1260, Honeywell lists the RA890K1260 replacement kit using RM7890A1015, Q7800F1004/U and R7849A1023. RA890G1336 is listed as a component-by-component replacement rather than a standard kit.

 

🔹 Product Datasheet

Honeywell documentation confirms the 120 VAC, 50/60 Hz rating, 3-second flame-failure response and 15-second safety-switch timing for RA890G1260. Honeywell’s cross-reference gives the same 120 VAC, 3-second and 15-second characteristics for RA890G1336.

 

🔹 Main Features

🔥 Flame Safeguard Control
Designed to supervise burner flame conditions and provide safety-related combustion control.

⚡ 120 VAC Supply
Both RA890G1260 and RA890G1336 versions listed here are 120 VAC, 50/60 Hz models.

⏱️ 3-Second Flame Failure Response
Both models use a 3.0-second flame-failure response specification.

🚨 SPDT Alarm Contacts
The RA890G series provides SPDT alarm relay contacts for associated burner-control circuitry.

🛡️ 15-Second Safety Switch Timing
The specified safety-switch timing for these two models is 15 seconds.

🔦 Ultraviolet Flame Detection
The RA890G configuration is associated with ultraviolet flame detection. Honeywell documentation lists compatible UV flame detectors such as C7012A/C for the RA890 family.

 

🔹 Operating Procedure — How to Use

⚠️ This is a combustion safety controller. Installation, adjustment and commissioning should be performed by qualified burner-service personnel following the applicable Honeywell documentation and local safety requirements.

1. 🔍 Verify the complete model number and voltage before installation.
2. 🧩 Confirm the correct mounting base and associated flame amplifier.
3. 🔦 Verify that the installed UV flame detector is compatible with the control configuration.
4. 🔌 Inspect all burner-control wiring, interlocks and safety circuits.
5. ⚡ Install the controller on the correct base with power isolated.
6. 🔥 Verify the burner fuel train, ignition system and safety interlocks before startup.
7. ⚡ Energize the controller according to the burner manufacturer’s startup procedure.
8. 🔦 Confirm that the flame detector correctly recognizes the flame.
9. 🚨 Verify flame-failure shutdown and alarm functions during commissioning.
10. ✅ Return the burner to normal automatic operation only after all safety checks have passed.

 

🔹 Power-Up / Burner Start Sequence

A typical sequence should be coordinated with the complete burner management system:

1. 🔒 Confirm all safety interlocks are satisfied.
2. 🔌 Confirm correct 120 VAC supply.
3. ⚡ Energize the combustion controller.
4. 🔄 Complete the required purge/pre-purge sequence.
5. 🔥 Initiate the ignition sequence.
6. 🔦 Confirm flame detection.
7. ⏱️ Confirm flame establishment within the permitted timing.
8. ⛽ Permit the burner fuel valves to remain energized only when the required safety conditions are satisfied.
9. 📊 Monitor flame status during operation.

Honeywell notes that RA890-related systems can require external purge-timing equipment, such as the ST7800A, depending on the application.

 

🔹 Shutdown Sequence

1. 🛑 Initiate the normal burner shutdown command.
2. ⛽ De-energize the fuel valves according to the burner sequence.
3. 🔥 Confirm that the flame is extinguished.
4. 🔄 Complete the required post-purge or shutdown sequence if installed.
5. ⚡ Remove controller power only when maintenance isolation is required.
6. 🔒 Apply the plant’s lockout/tagout procedure before servicing.

For a flame safeguard system, do not bypass flame detection, safety interlocks or fuel-valve protection merely to keep the burner running.

 

🔹 Product Usage

The RA890G series is designed for combustion equipment where flame supervision and burner safety are required.

Typical applications include:

• 🔥 Industrial gas burners
• 🏭 Industrial furnaces
• ♨️ Heating equipment
• 🛢️ Boiler burner systems
• 🏗️ Process heating equipment
• 🔧 Burner management panels
• 🧪 Process combustion systems
• ⚙️ Gas-fired industrial equipment

The RA890 family supports gas, oil and combination gas/oil burner applications within the broader Honeywell legacy combustion-control portfolio.

 

🔹 Important Replacement Information

RA890G1260 → Recommended Honeywell replacement configuration:

RM7890A1015 + Q7800F1004/U + R7849A1023

Honeywell identifies this combination as the replacement for RA890G1260 and lists the complete replacement kit as RA890K1260.

RA890G1336 → Recommended Honeywell replacement configuration:

RM7890A1015 + Q7800F1004/U + R7849A1023

Honeywell’s cross-reference lists these components for RA890G1336, with the replacement components ordered separately.

⚠️ Although the replacement components are similar, the original controller should not be replaced solely by matching the voltage. Verify the burner application, flame detector, amplifier, subbase, wiring and safety sequence before conversion.

 

🔹 Common Questions & Answers

Q1: What is HONEYWELL RA890G1260?

A: It is a Honeywell RA890 Protectorelay flame safeguard/combustion controller designed for burner flame supervision.

Q2: What is the voltage of RA890G1260?

A: RA890G1260 is rated for 120 VAC, 50/60 Hz.

Q3: What is the flame failure response time?

A: RA890G1260 has a 3.0-second flame-failure response time.

Q4: What is RA890G1336?

A: RA890G1336 is another 120 VAC RA890G flame-safeguard model with a 3-second flame-failure response and 15-second safety-switch timing.

Q5: Are RA890G1260 and RA890G1336 interchangeable?

A: They should not be assumed to be directly interchangeable. Even though their basic voltage and timing specifications are similar, the complete burner application and system configuration must be checked.

Q6: Is the RA890 series still manufactured?

A: The RA890 product line has reached end-of-life. Honeywell documentation provides RM/EC7800-series replacement options.

Q7: What replaces RA890G1260?

A: Honeywell lists the RA890K1260 replacement kit using RM7890A1015, Q7800F1004/U and R7849A1023.

Q8: What replaces RA890G1336?

A: Honeywell lists RM7890A1015, Q7800F1004/U and R7849A1023 as replacement components for RA890G1336.

Q9: What flame detector is associated with the RA890G configuration?

A: The RA890G family is associated with ultraviolet flame detection, with Honeywell documentation referencing C7012A/C UV detectors.

Q10: What should I provide when ordering a replacement?

A: Provide the exact controller model, supply voltage, flame detector model, flame amplifier model, subbase model and photographs of the existing installation. This helps prevent selecting an apparently similar but incompatible combustion controller.

 

🔹 Recommended HONEYWELL Models / Series

1. HONEYWELL RM7890A1015 | Burner Control Relay Module
2. HONEYWELL R7849A1023 | UV Flame Amplifier
3. HONEYWELL Q7800F1004/U | Subbase Adapter
4. HONEYWELL RA890K1260 | RA890G1260 Replacement Kit
5. HONEYWELL RM7890B1063 | Burner Control Module
6. HONEYWELL EC7890B1028 | Flame Relay Module
7. HONEYWELL R7849A1015 | UV Flame Amplifier
8. HONEYWELL R7847A1025 | Flame Amplifier
9. HONEYWELL R7847A1033 | Flame Amplifier
10. HONEYWELL ST7800A | Purge Timer / Burner Sequencing Component

These models are related to the RA890 replacement and burner-management ecosystem; exact substitution depends on the original RA890 model and application.

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