RM7885A
7800 SERIES Relay Modules
APPLICATION
The Honeywell RM7885A are microprocessor-based
integrated burner controls for semi-automatically fired
gas, oil, or combination fuel single burner applications.
The RM7885A Relay Modules are intended to replace the
R485B Protectorelay™ Primary Control and the
R4075C,D,E Industrial Flame Safeguard Primary Controls.
The
RM7885A System consists of a relay module, subbase and
amplifier. Options include Personal Computer Interface,
keyboard display module (KDM), Data ControlBus
Module™, remote display mounting, expanded
annunciator and Combustion System Manager
The RM7885A are adaptable to continuous firing, high-
low or modulating firing rate for semi-automatic burner
sequencing.
This document covers the following modules:
RM7885A1015
RM7885A2015
Functions the RM7885A provide include flame
supervision, system status indication, system or self-
diagnostics and troubleshooting.
The RM7885A operates with any of the following types of
ignition:
1. Torch-ignited main burner using the S445A Start-
Stop Station, or any conventional knee- or foot-oper-
ated start-stop station.
2. Torch-ignited pilot using the S445A Start-Stop Sta-
tion, or any conventional knee- or foot-operated
start-stop station.
3. Direct-ignition oil burner or electrically-ignited pilot,
using the S445A Start-Stop Station, which main-
tains electric ignition as long as the Start Switch is
depressed (up to 15 minutes).
This document provides installation and static checkout
instructions. Other applicable publications are:
Form
Number
63-2278
65-0084
65-0090
65-0091
®
Software.
65-0095
65-0097
65-0101
65-0131
65-0229
65-0295
32-00110
32-00160
32-00166
32-00235
SPECIFICATIONS
Electrical Ratings (See Table 3):
Voltage and Frequency:
120 Vac (+10/-15%), 50/60 Hz (± 10%).
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 15A maximum, type S/C or
equivalent.
SIL
3
Capable
INSTALLATION INSTRUCTIONS
Description
Q7700A Network Interface Unit Product
Data
Q7800A,B 22-Terminal Wiring Subbase
Product Data
S7800A Keyboard Display Module Product
Data.
S7810A Data ControlBus Module™
Product Data
S7820 Remote Reset Module Product
Data
221729C Dust Cover Packing Sheet
S7830 Expanded Annunciator Product
Data
221818A Extension Cable Assembly
Product Data
7800 SERIES RELAY MODULES Checkout
and Test
NEMA4 covers for 2-line VF KDM,
50023821-001 w/o reset, 50023821-
002 with reset
4-line LCD KDM S7800A2142
Tester for 2000 Series Flame Relays
A7800A2010, (accommodates grounding
pin)
NEMA4 covers for 4-line KDM, 204729A
w/o reset, 204729B with reset
R7824, R7847, R7848, R7849, R7851,
R7861, R7886 Flame Amplifiers for the
7800 SERIES Product Data
32-00215-01