Product Overview
Table Of Contents
- Application
- Features
- Optional Features
- Specifications
- Principal Technical Features
- Safety Provisions
- Internal Hardware Status Monitoring
- Closed Loop Logic Test
- Dynamic AMPLI-CHECKTM Circuitry
- Dynamic Input Check
- Dynamic Safety Relay Test
- Dynamic Self-Check Safety Circuit
- Expanded Safe-Start Check
- Off Cycle (Standby) Flame Signal Check
- Tamper Resistant Timing and Logic
- Verified Spark Termination
- First-Out Annunciation and Self- Diagnostics
- Interlock Requirements (RM7895 Only)
- Installation
- Wiring
- Assembly
- Operation
- Initiate
- Standby
- Static Checkout
- Checkout
- Equipment Recommended
- Checkout Summary
- Preliminary Inspection
- Flame Signal Measurement
- Initial Lightoff Check for Proved Pilot
- Initial Lightoff Check for Direct Spark Ignition (DSI)
- Pilot Turndown Test (All Installations Using a Pilot)
- Ignition Interference Test (All Flame Rods)
- To Eliminate Ignition Interference
- Flame Signal with Hot Combustion Chamber (All Installations)
- Safety Shutdown Tests (All Installations)
- Troubleshooting
PRODUCT DATA
66-1195-01
RM7890; RM7895 100 Vac
7800 SERIES Relay Modules
APPLICATION
The Honeywell RM7890B; RM7895A Relay Modules are
microprocessor based integrated burner controls for
automatically fired gas, oil or combination fuel single burner
On/Off applications. The RM7890B; RM7895A System
consists of the relay module, wiring subbase, amplifier and
the RM7895A also requires a purge timer. Options include
Keyboard Display Module (KDM), Data ControlBus™ Module,
remote display mounting and Modbus communications is
available using the S7810M Modbus Module or configuring the
S7800 KDM.
The RM7890; RM7895 is programmed to provide a level of
safety, functional capability and features beyond the capacity
of conventional controls.
The RM7890; RM7895 provides on/off automatic burner
sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting. The RM7895
includes an output for the blower motor to provide purging.
This document provides installation and static checkout
instructions. Other applicable publications are:
FEATURES
• Safety features:
— Closed loop logic test.
— Dynamic AMPLI-CHECK™ circuitry.
— Dynamic input check.
— Dynamic safety relay test.
— Dynamic self-check logic.
Form
Number Description
65-0249 S7810M Modbus Module
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 Sheet
65-0109 R7824, R7847, R7848, R7849, R7851, R7852,
R7861, R7886 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
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Principal Technical Features ............................................. 6
Installation ........................................................................ 7
Wiring ............................................................................... 10
Assembly .......................................................................... 13
Troubleshooting ................................................................ 24