Installation - Honeywell 7800 Series Product Data

First-out Annunciation and Self-Diagnostics
Sequence Status Lights (LEDs) provide positive visual
indication of the program sequence: POWER, PILOT,
FLAME, MAIN and ALARM. The green POWER LED blinks
every four seconds, signifying that the RM7896 hardware is
running correctly.
Optional multi-function Keyboard Display Module shows
elapsed time during PREPURGE, PILOT IGN and MAIN IGN.
As an additional troubleshooting aid, it provides sequence
timing, diagnostic information, historical information and
expanded annunciator information when a safety shutdown or
hold or normal operation occurs.
First-out Annunciation reports the cause of a safety shutdown
or identifies the cause of a failure to start or continue the
burner control sequence with an English text and numbered
code via the optional Keyboard Display Module. It monitors all
field input circuits, including the flame signal amplifier. The
system distinguishes 43 modes of failure and detects and
annunciates difficult-to-find intermittent failures.
Self-Diagnostics add to the First-out Annunciation by allowing
the RM7896 to distinguish between field (external device) and
internal (system related) problems. Faults associated within
the flame detection subsystem, RM7896 or Plug-in Purge
Card are isolated and reported by the optional Keyboard
Display Module. See 7800 SERIES System Annunciation
Diagnostics and Troubleshooting, form 65-0118.
Interlock Requirements
The following interlock input is provided:
Airflow Switch Interlock
This interlock is typically connected to an airflow switch. The
Airflow Interlock (ILK) input must close ten seconds into
PREPURGE or within the specified purge card timing;
otherwise, a recycle to the beginning of PREPURGE or
lockout will occur, depending on how the airflow switch
selectable jumper is configured (see Table 3 in the Operation
section). The RM7896B,D has an airflow switch safe-start
check feature. If the control input terminal 6 is energized and
the airflow switch is closed during STANDBY, RM7896B,D will
lockout after 120 seconds.

INSTALLATION

WARNING
FIRE OR EXPLOSION HAZARD CAN CAUSE
PROPERTY DAMAGE, SEVERE INJURY, OR
DEATH
To prevent possible hazardous burner operation,
verification of safety requirements must be performed
each time a control is installed on a burner.
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
7800 SERIES RM7896A,B,C,D RELAY MODULE
2. Check the ratings given in the instructions and marked
on the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced, flame
safeguard service technician.
4. After installation is complete, check out the product
operation as provided in these instructions.
CAUTION
1. Disconnect the power supply before beginning
installation to prevent electrical shock and
equipment damage. More than one power supply
disconnect may be involved. See Fig. 6.
2. Wiring connections for the RM7896 are unique;
therefore, refer to Fig. 7 or 8 or the correct
Specifications for proper subbase wiring.
3. Wiring must comply with all applicable codes,
ordinances and regulations.
4. Wiring, where required, must comply with NEC
Class 1 (Line Voltage) wiring.
5. Loads connected to the RM7896 must not exceed
those listed on the RM7896 label or the
Specifications, see Table 1.
6. Limits and interlocks must be rated to carry and
break current simultaneously to the ignition
transformer, pilot valve, and main fuel valve(s).
7. All external timers must be listed or components
recognized by authorities who have jurisdiction for
the specific purpose for which they are used.
IMPORTANT
1. For on-off gas-fired systems, some authorities who
have jurisdiction prohibit the wiring of any limit or
operating contacts in series between the flame
safeguard control and the main fuel valve(s).
2. Two Detectors can be connected in parallel with the
exception of Infrared Detectors (C7015).
3. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used
in accordance with the Instruction Manual, may
cause interference with radio communication. It has
been tested and found to comply with the limits for a
Class A computing device pursuant to Subpart J of
part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference
when operated in a commercial environment.
Operation of this equipment in a residential area is
likely to cause interference, in which case, users at
their own expense will be required to take whatever
measures may be required to correct the
interference. Any unauthorized modification of this
equipment may result in the revocation of the
owner's authorization to continue its operation.
4. This digital apparatus does not exceed the Class B
limits for radio noise of digital apparatus set out in
the Radio Interference Regulations of the Canadian
Department of Communications.
Humidity
Install the RM7896 where the relative humidity never reaches
the saturation point. The RM7896 is designed to operate in a
maximum 85% RH continuous, noncondensing, moisture
environment. Condensing moisture may cause a safety
shutdown.
9
65-0193