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
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