Honeywell RM7895A1048 User Manual

INSTALLATION INSTRUCTIONS
32-00156-03
SIL
3
Capable
Edition 03.20 · 32-00156-03 · EN
APPLICATION
The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D are micro-
processor-based integrated burner controls for automatically
fired gas, oil, or combination fuel single burner applications.
They are intended to replace the R4795 and R7795 Primary
Controls. The RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D
systems consist of a relay module, subbase, amplifier, and
purge card. Options include: 2-line VFD (see document 65-
0090-6) or 4-line LCD (see document 32-00110-01) Key-
board Display Module, Personal Computer Interface, Data
ControlBus™ Module, remote display mounting, expanded
annunciator and Combustion System Manager® Software.
Functions provided by the RM7895A,B,C,D/EC7895A,C;
RM7896A,B,C,D include automatic burner sequencing, flame
supervision, system status indication, system or self-diagnos-
tics and troubleshooting. The RM7896 provides a postpurge
function.
This document covers the following 7800 Series Relay
Modules:
1000-Series 2000-Series
• RM7895A1014 • RM7895A2014
• RM7895A1048 • RM7895A2048
• RM7895B1013 • RM7895B2013
• RM7896A1012 • RM7896A2012
• RM7895C1020 • RM7895C2020
• RM7895C1012 • RM7895C2012
• RM7895D1011 • RM7895D2011
• RM7896C1010 • RM7896C2010
• RM7896D1019 • RM7896D2019
• EC7895A1010 • EC7895A2010
• EC7895C1000 • EC7895C2000
RM7895A,B,C,D/EC7895A,C;
RM7896A,C,D
7800 SERIES Relay Modules
This document provides installation and static checkout in-
structions. Other applicable publications are:
Publication
No.
Product
32-00110 S7800A2142 4-line LCD Keyboard Display
Module Product Data
32-00166 204729A/C KDM NEMA4 Covers for 4-line
LCD KDM
32-00235 R7824, R7847, R7848, R7849, R7861,
R7886 Flame Amplifiers for the 7800
SERIES Product Data
65-0084 Q7800A,B 22-Terminal Wiring Subbase
Product Data
65-0090 S7800A Keyboard Display Module Product
Data
65-0091 S7810A Data ControlBus™ Module
Product Data
65-0095 S7820 Remote Reset Module Product Data
65-0097 221729C Dust Cover Packing Instructions
65-0131 221818A Extension Cable Assembly
Product Data
65-0228 S7810B Multi-Drop Switch Module
Product Data
65-0229 7800 SERIES Relay Modules Checkout
and Troubleshooting Product Data.
65-0249 S7810M ModBus Module (For CE ,
Modbus module S7810M1029 only).
65-0295 50023821-001/2 KDM NEMA4 Covers for
classic 2-line VFD KDM
65-0089 ST7800A,C Plug-In Purge Timer
SPECIFICATIONS
Electrical Ratings (See Table 3):
Voltage and Frequency:
RM7895/RM7896: 120 Vac (+10/-15%), 50/60 Hz (±
10%).
EC7895A,C: 220-240 Vac (+10%/-15%), 50/60 Hz
(±10%)
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 15A Fast Blow, type SC or equiv-
alent.

Honeywell RM7895A1048 Specifications

General

Model	RM7895A1048
Voltage	24 V AC
Application	Commercial/Industrial
Frequency	50/60Hz
Approvals	CSA, UL
Operating Temperature Range	-40°F to 150°F (-40°C to 65°C)

Summary

Product Application and Specifications

Product Overview

Describes the RM7895/RM7896/EC7895 series relay modules and their functions.

Related Publications

Lists other documents relevant to the 7800 Series Relay Modules.

Electrical Ratings

Details voltage, frequency, power dissipation, and load capacity.

Environmental Conditions and Installation

Environmental Conditions

Specifies operating temperature, humidity, and vibration limits.

Approvals and Certifications

Lists UL, CSA, EAC, and FCC compliance.

Installation Preparations

Key steps and warnings before installing the unit.

Location Considerations

Guidelines for choosing a suitable installation site.

Mounting the Wiring Subbase

Instructions for securing the subbase.

Subbase Compatibility and Wiring

Subbase Models and Compatibility

Details on Series 1000 and 2000 subbase compatibility.

Wiring Safety and Requirements

Crucial safety notes and wiring regulations.

Wiring Diagrams

Internal Wiring Schematic

Illustrates the internal connections of the relay module.

Subbase Wiring and Sequence Charts

Q7800 Subbase Wiring

Diagram showing connections to the Q7800 subbase.

Sequence Chart for RM7895A/B, EC7895A, RM7896A/B

Visualizes the operating sequence for specific models.

Model-Specific Wiring and Sequences

RM7895C/D, EC7895C, RM7896C/D Wiring

Wiring diagram for specific models.

Sequence Chart for RM7895C/D, EC7895C, RM7896C/D

Sequence states for specific models.

Wiring and Grounding Guidelines

Recommended Wire Specifications

Wire size and part number recommendations.

Grounding Practices

Proper grounding methods for system stability.

Final Wiring Check Procedure

Steps to verify all wiring before operation.

Terminal Functions and Ratings

Terminal Descriptions and Ratings

Details of each terminal and its electrical capacity.

Combination Examples

Illustrates terminal usage for different burner configurations.

Static Checkout Procedures

Recommended Equipment for Testing

Tools needed for pre-installation checks.

General Static Checkout Instructions

Guidelines for performing system checks.

Static Checkout Test Steps

Specific tests to verify component operation.

Relay Module Mounting and Features

Mounting the Relay Module

Instructions for physically installing the module.

Principal Technical Features

Highlights of the product's advanced functions.

Safety Shutdown Conditions

Scenarios that trigger a system lockout.

Relay Module Assembly and Operation

Exploded View of Relay Module

Visual breakdown of module components.

Operating Sequence Stages

Detailed descriptions of Standby, Pre-Purge, PFEP, MFEP.

Detailed Operational Sequences

Initiate, Standby, and Pre-Purge

Initial states and startup sequence phases.

Ignition Trials and Run Periods

Flame establishing and normal operation phases.

Post-Purge Operation

Actions taken after the burner cycle completes.

Settings, Adjustments, and Safety

Run/Test Switch Functionality

How to use the switch for testing and adjustments.

Site-Configurable Jumpers

Options for customizing module behavior.

Physical Device Security

Measures to prevent unauthorized access or tampering.

Interface Security and Agreements

Modbus & DDL Interface Security

Protecting communication lines from compromise.

License Agreement Terms

Legal restrictions on use and reverse engineering.