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RM7838B,C
7800 SERIES Relay Module
APPLICATION
The Honeywell RM7838B,C is a microprocessor based
integrated burner control for industrial process
modulating semiautomatically fired gas, oil, coal or
combination fuel single burner applications. The
RM7838B,C System consists of a relay module, wiring
subbase, keyboard display module (KDM), amplifier, and
purge card. Options include Data ControlBus Module™,
remote display mounting, and first-out expanded
annunciator.
Functions provided by the RM7838B,C include automatic
modulated High Fire and Low Fire proven Purge, burner
pilot startup with pilot valve hold, a special pilot valve hold
from the Run condition, flame supervision, system status
indication, system or self-diagnostics and
troubleshooting.
The RM7838C differs from the RM7838B as follows:
1. Alarms only on Safety Shutdown.
2. Requires ST7800C Purge Timer.
3. C1004 has 15 second MFEP. C1020 has 5 second
MFEP.
This document covers the following 7800 Series Relay
Modules:
RM7838C1020
RM7838C2020
RM7838C1004
RM7838C2004
RM7838B1013
RM7838B2013
This document provides installation and static checkout
instructions. Other applicable publications are:
Form
Number
32-00110 S7800A2142 4-line LCD Keyboard Display
Module Product Data
32-00166 204729A/C KDM NEMA4 Covers for 4-line
LCD KDM
65-0084
Q7800A,B 22-Terminal Wiring Subbase
Product Data
65-0089
ST7800A Plug-In Purge Timer Installation
Instructions.
65-0090
S7800A Keyboard Display Module Product
Data.
RM7838C1020 and
RM7838C2020 only
Description
SIL
3
Capable
0063
INSTALLATION INSTRUCTIONS
Form
Number
65-0101
S7830 Expanded Annunciator Product Data.
65-0109
R7824, R7847, R7848, R7849, R7851, 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 Product Data
65-0249
S7810M ModBus Module (For CE , Modbus
module S7810M1029 only).
65-0295
50023821-001/2 KDM NEMA4 Covers for
classic 2-line VFD KDM
SPECIFICATIONS
Electrical Ratings (See Table 4):
Voltage and Frequency: 120 Vac (+10/-15%),
50/60 Hz (±10%).
Power Dissipation:
RM7838B,C: 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, noncon-
densing.
Vibration: 0.5G environment.
SIL 3 Capable:
SIL 3 Capable in a properly designed Safety Instrumented
System. See form number 65-0312 for Certificate
Agreement.
Description
32-00199-01
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Need help?
Do you have a question about the 7800 Series and is the answer not in the manual?
Questions and answers
Los códigos de fallas que presenta el programador detalles
The Honeywell 7800 Series controller uses blinking fault codes to indicate errors. Some of the error codes include:
- Code 1-1: Low AC line detected.
- Code 1-2: AC quality problem (excessive noise, slow/fast device running, or AC line dropout).
- Code 2-1: Flame sensed when not expected.
- Code 3-2: Fault code 32 (specific details not provided in the context).
- Fault 110: Nonresettable system failure after 200 hours if a site-configurable jumper is removed.
For troubleshooting, refer to the LED blink patterns and recommended actions in the system manual.
This answer is automatically generated
How to remove 24 hour cycle? So that the controller does not stop the burners every 24 hours, but works continuously until the error is triggered