Honeywell RM7895A1014 7800 Series On-Off Primary Burner Controller

Overview

The Honeywell RM7895A1014 serves as a microprocessor-based burner control module. This advanced 7800 Series primary burner controller manages automatic burner operation in single-burner applications. Engineers rely on the RM7895A1014 to maintain safety during ignition and firing cycles.

This Honeywell unit integrates flame supervision with purge timing control. The RM7895A1014 controller automatically sequences prepurge, pilot ignition, and main burner operation. Advanced internal diagnostic circuits constantly monitor critical safety interlocks throughout the operational sequence.

Technical Specifications

Basic Identification & Electrical Setup

• Brand: Honeywell
• Model Number: RM7895A1014
• Product Series: 7800 Series Burner Controls
• Module Type: On-Off Primary Burner Controller
• Operating Voltage: 120 Vac (+10%, -15%)
• Line Frequency: 50 Hz / 60 Hz (±10%)

Functional Performance & Operational Timing

• Prepurge Timing: Configured via ST7800A Plug-in Purge Timer Card
• Pilot Flame Establishing Period: Selectable 4 seconds or 10 seconds
• Main Flame Establishing Period: Intermittent operation
• Delayed Main Valve: No
• Pilot Type: Intermittent pilot ignition
• Safety Interlocks: Field selectable configuration

Environmental Limits & Robustness

• Operating Temperature Range: -40°F to +140°F (-40°C to +60°C)
• Storage Temperature Range: -40°F to +140°F (-40°C to +60°C)
• Vibration Tolerance: 0.5 G continuous operating environment
• Interference Resistance: High immunity to industrial electromagnetic interference

Physical Dimensions & Enclosure Data

• Dimensions with Q7800A Subbase: 5 in. W x 5 in. H x 5 1/4 in. D (127 mm x 127 mm x 133 mm)
• Dimensions with Q7800B Subbase: 5 in. W x 5 in. H x 6 3/32 in. D (127 mm x 127 mm x 155 mm)
• Net Weight: 1 lb 15 oz (0.9 kg)

System Compatibility & Required Sub-components

The RM7895A1014 operates as a modular control assembly. Operators must select matching sub-components for full functionality:

• Wiring Subbases: Requires Honeywell Q7800A or Q7800B universal subbase.
• Flame Signal Amplifiers: Compatible with 7800 Series amplifiers (R7847, R7848, R7849, R7851, R7852, R7861, or R7886).
• Purge Timer Card: Requires dedicated ST7800A plug-in timer card to establish prepurge duration.

Installation Guidelines

Follow standard engineering electrical practices when installing the Honeywell RM7895A1014:

• Disconnect all power supplies before touching terminal connections.
• Mount the Q7800A or Q7800B subbase securely in your control panel.
• Verify correct line voltage of 120 Vac before energizing circuits.
• Insert the ST7800A purge card directly into the controller slot.
• Plug the chosen 7800 Series amplifier into the controller body.
• Press the RM7895A1014 firmly onto the subbase until latches engage.

Commissioning & Maintenance Convenience

The RM7895A1014 simplifies maintenance through clear visual status reporting:

• Light-emitting diodes provide real-time sequence and fault diagnostic status.
• Plug-in architecture allows module replacement without rewiring the subbase.
• Integrated test points enable fast flame signal voltage readings during startup.

Global Standards & Regulatory Approvals

• UL Approval: Component Recognized, File No. MP268; Guide No. MCCZ.
• CSA Certification: Certified under File No. LR95329-3.
• FCC Compliance: FCC Part 15, Class B Emissions standard.
• FM Approval: Factory Mutual Approved, Report No. OX4A5.AF.
• CSD-1 Compliance: Acceptable for Control Safety Devices standard CSD-1.
• Insurance Approvals: Acceptable under Swiss RE standards.

Package Standard Contents

Each shipment standard packaging includes:

• 1 x Honeywell RM7895A1014 Control Module
• 1 x Installation & Operating Manual Leaflet

Selection & Purchasing Guide

When selecting your 7800 Series primary burner control setup, ensure complete hardware matching:

• Purge Timer Selection: Match your process prepurge time requirement using the corresponding ST7800A card rating.
• Sensor & Amplifier Pairing: Select an R78XX amplifier matching your flame detector type (Rectification, Infrared, or UV).
• Wiring Base Setup: Choose Q7800A for flush mounting or Q7800B for knockouts.

Frequently Asked Questions (FAQ)

Q: Does the Honeywell RM7895A1014 package include the purge timer card or subbase?

A: No. The RM7895A1014 is the primary control module only. You must order the Q7800 subbase, ST7800A purge card, and flame amplifier separately.

Q: How do field technicians select the prepurge timing on the RM7895A1014 controller?

A: Prepurge timing depends entirely on the selected ST7800A plug-in card installed into the controller chassis.

Q: What flame detectors work with the RM7895A1014 burner control system?

A: Compatibility depends on your selected 7800 Series amplifier, supporting optical flame sensors, UV detectors, or flame rods.

Q: Can I replace an RM7895A1014 module without rewiring the system?

A: Yes. You can remove the controller from the Q7800 wiring subbase directly without disconnecting field wiring.

Q: What field symptom indicates a missing ST7800A purge timer card during startup?

A: The RM7895A1014 module will lock out or refuse sequence initialization if the ST7800A card is missing.

Tags