Honeywell RM7890B1030 - User Manual

CONTENTS
1 APPLICATION
The Honeywell RM7890A,B,C/EC7890B Relay Modules are
microprocessor based integrated burner controls for on/off auto-
matically fired gas, oil, or combination fuel single burner applica-
tions. The RM/EC7890 Relay Module is intended to replace the
RA890F,G, H Protectorelay® Primary Control. The RM/EC7890
System consists of a relay module, subbase, and amplifier. Op-
tions include: 2- line VFD (see document 65-0090) or 4-line LCD
(see document 32-00110) Keyboard Display Module, and remote
display mounting.
Functions the RM/EC7890 provides include automatic burner
on/off sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting.
This document provides installation and static checkout instruc-
tions. Other applicable publications are:
Publication
No.
Description
32-00110
S7800A2142 4-line LCD Keyboard Display
Module Product Data
32-00167 Q7800A/B Wiring Subbase Product Data
32-00166
204729A/C KDM NEMA4 Covers for 4-line
LCD KDM
65-0090
S7800A 2-line 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.
65-0109
Flame Amplifiers for the 7800 SERIES Product
Data.
65-0131
221818A Extension Cable Assembly Product
Data
65-0229
7800 SERIES Relay Modules Checkout and
Troubleshooting.
65-0249 S7810M ModBus Module.
32-00261M
Q7800F Adapter Subbase for Connecting 7800
SERIES to Q270 Subbase
EN – www.docuthek.com
7800 SERIES Relay Modules
RM7890A, B/EC7890B
1 Application ...................................1
2 Specifications.................................2
3 Installation ...................................2
4 Static Checkout ...............................6
5 Principal Technical Features .....................10
6 Operation ...................................10
7 Settings and Adjustments.......................11
8 Safety and Security ...........................11
9 Disposal ....................................11
OPERATING INSTRUCTIONS
· Edition 12.23 · 32-00157 · EN

Honeywell RM7890B1030 Specifications

General

Brand	Honeywell
Model	RM7890B1030
Category	Relays
Language	English

Summary

Specifications

Electrical Ratings

Specifies voltage, frequency, power dissipation, and load ratings for the relay modules.

Installation

Installation Location Guidelines

Mounting the Wiring Subbase

Wiring Instructions

Details wiring practices, including wire routing, lengths, and NEC compliance.

Final Wiring Check

Static Checkout

General Static Checkout Instructions

Mounting the Relay Module

Instructions for vertically or horizontally mounting the RM/EC7890 relay module on the subbase.

Principal Technical Features

Safety Shutdown Conditions

Details all conditions that trigger a safety shutdown or lockout for the relay module.

Operation

Sequence of Operation Overview

Explains the operating sequences, including Initiate, Standby, Safe Start Check, and Run.

Initiate Sequence

Normal Start-Up Safe Start Check

Ignition Trials

Covers Pilot Flame Establishing Period (PFEP) and main valve energization.

Settings and Adjustments

Selectable Site-Configurable Jumpers

Details the two jumper options for configuring PFEP and flame failure response action.

Safety and Security

Physical Device Protection