7800 seRIes Relay Modules
RM7890A, B/eC7890B
Contents
1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
9 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
oPeRAtInG InstRUCtIons
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.
S7800A2142 4-line LCD Keyboard Display
32-00110
32-00167
Q7800A/B Wiring Subbase Product Data
204729A/C KDM NEMA4 Covers for 4-line
32-00166
S7800A 2-line Keyboard Display Module
65-0090
S7810A Data ControlBus Module™ Product
65-0091
65-0095
S7820 Remote Reset Module Product Data.
65-0097
221729C Dust Cover Packing Instructions.
Flame Amplifiers for the 7800 SERIES Product
65-0109
221818A Extension Cable Assembly Product
65-0131
7800 SERIES Relay Modules Checkout and
65-0229
65-0249
Q7800F Adapter Subbase for Connecting 7800
32-00261M
· Edition 12.23 · 32-00157 · EN
Description
Module Product Data
LCD KDM
Product Data.
Data.
Data.
Data
Troubleshooting.
S7810M ModBus Module.
SERIES to Q270 Subbase