Advertisement
RM7890A,B,C/EC7890A,B
7800 SERIES Relay Modules
APPLICATION
The Honeywell RM7890A,B,C/EC7890A,B Relay Modules are
microprocessor based integrated burner controls for on/off
automatically fired gas, oil, or combination fuel single burner
applications. 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. Options include keyboard display module (KDM),
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
instructions. Other applicable publications are:
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.
65-0109: Flame Amplifiers for the 7800 SERIES Product
Data.
65-0131: 221818A,C Extension Cable Assembly Product
Data.
65-0229: 7800 SERIES Relay Modules Checkout and
Troubleshooting.
65-0249:S7810M ModBus Module.
SIL
Capable
3
INSTALLATION INSTRUCTIONS
SPECIFICATIONS
Electrical Ratings (See Table 3):
Voltage and Frequency:
RM7890: 120 Vac (+10/-15%), 50/60 Hz (±10%).
EC7890: 220/ 240 Vac (+10%/-15%), 50/60 Hz (±10%).
Power Dissipation: 10W maximum.
Maximum Total Connected Load: 2000 VA.
Fusing Total Connected Load: 15A maximum, type SC or
equivalent, fast blow.
Environmental Ratings:
Ambient Temperature:
Operating: -40°F to +140°F (-40°C to +60°C).
Storage: -40°F to +150°F (-40°C to +66°C).
Humidity: 85% relative humidity continuous, noncondensing.
Vibration: 0.5G environment.
SIL 3 Capable
SIL 3 Capable in a properly designed Safety Instrumented
System. See form number 65-0312 for Certificate Agree-
ment.
Approvals:
RM7890A,B:
Underwriters Laboratories Inc. Listed: File No. MP268,
Guide No. MCCZ.
Canadian Standards Association Certified: LR9S329-3.
Factory Mutual Approved: Report No. J.I.1V9A0.AF.
Swiss RE (formerly IRI) : Acceptable.
Federal Communications Commission: Part 15, Class B,
Emissions.
RM7890C:
Underwriters Laboratories Inc.: Component Recognized.
EC7890:
Factory Mutual: Approved.
EC7890A1037, RM7890A1064:, RM7890B1055
Gastec—EN268, Report 115679/1.
Note: RM7890B1055 is rated cULus and CE.
EC7890A1037,
RM7890A1064 or
RM7890B1055 only.
Put Bar Code Here
66-1089-11
Advertisement
Table of Contents
Related Manuals for Honeywell ec7890a
Summarization of Contents
Specifications
Electrical Ratings
Details voltage and frequency for RM7890 and EC7890 models.
Environmental Ratings
Specifies operating and storage temperature and humidity limits.
SIL 3 Capable
States SIL 3 capability in a Safety Instrumented System.
Approvals
Lists certifications from UL, CSA, FM, FCC, and others for models.
Installation
When Installing this Product...
Emphasizes reading instructions, checking ratings, and technician qualifications.
Important Wiring Notes
Highlights wiring connection uniqueness, codes, and load limitations.
Location Considerations
Discusses environmental considerations for module placement.
Humidity Requirements
Specifies maximum humidity for operation to prevent shutdown.
Vibration Limits
Sets the limit for continuous vibration exposure.
Weather Protection
Notes the need for enclosure if installed outdoors.
Mounting Wiring Subbase
Provides instructions for mounting the subbase.
Wiring Procedures
Electrical Shock Hazard Warning
Warns of electrical shock risk and the need to disconnect power.
Subbase and Remote Wiring
Refers to figures and specifications for wiring and sequence charts.
Wire Routing Guidelines
Provides guidance on routing high-voltage and detector wires.
KDM and Power Supply
Discusses KDM mounting and power supply requirements.
Maximum Wire Lengths
Lists maximum wire lengths for various connections.
Recommended Wire Sizes
Refers to a table for recommended wire specifications.
KDM/Data ControlBus Wiring
Details wiring configuration for KDM/Data ControlBus with termination resistors.
Grounding Recommendations
Refers to a table for grounding recommendations.
Terminal Rating Checks
Advises checking terminal ratings against loads.
Final Wiring Check
Explosion Hazard Warning
Warns of explosion hazards and the need to close fuel shutoff valves.
Equipment Damage Hazard Caution
Warns against dielectric testing with the unit installed to prevent damage.
Recommended Equipment
Lists recommended equipment for static checkout, like a voltmeter.
Static Checkout General Instructions
Provides step-by-step instructions for performing the static checkout.
Static Checkout Post-Test Caution
Equipment Damage Hazard Caution
Instructs to remove jumpers and bypasses after testing to prevent damage.
Mounting Relay Module
Mounting Other System Components
Refers to applicable specifications for mounting other system components.
Principal Technical Features
Safety Shutdown Conditions
Lists conditions that trigger a safety shutdown or lockout.
Operation Sequence
Sequence of Operation Overview
Explains the program sequence and LED indications.
Initiate Sequence
Describes the initial power-up sequence and its tolerances.
Standby State
Explains the conditions for entering the standby state.
Normal Start-Up Safe Start Check
Details the safe start check procedure before ignition.
Ignition Trials
Covers Pilot Flame Establishing Period (PFEP) and ignition.
Run Mode
Explains the conditions for the burner to be in the run state.
Settings and Adjustments
Selectable Site-Configurable Jumpers
Explains the function and selection of site-configurable jumpers.
Need help?
Do you have a question about the ec7890a and is the answer not in the manual?
Questions and answers