Honeywell RM7824A Manuel D’Utilisation

7800 SERIES RM7824A RELAY MODULE

65-0155—1

6

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 39 modes of failure and detects and
annunciates difficult-to-find intermittent failures.

Self-diagnostics add to the First-out Annunciation by allowing
the RM7824A to distinguish between field (external device)
and internal (system related) problems. Faults associated
within the flame detection subsystem or RM7824A are
isolated and reported by the optional Keyboard Display
Module. See the 7800 SERIES System Annunciation
Diagnostics and Troubleshooting, form 65-0118.

FIRE OR EXPLOSION HAZARD CAN CAUSE
PROPERTY DAMAGE, SEVERE INJURY, OR
DEATH.
To prevent possible hazardous burner operation,
perform verification of safety requirements 

each time

a control is installed on a burner.

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous
condition.

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.

To prevent electrical shock and equipment damage,
disconnect the power supply before beginning
installation. More than one power supply disconnect
may be involved.

1. To prevent electrical shock and equipment damage,

disconnect the power supply before beginning
installation. More than one power supply disconnect
may be involved.

2. Wiring connections for the RM7824A are unique;

therefore, refer to Fig. 6 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

wiring.

5. Loads connected to the RM7824A must not exceed

those listed on the RM7824A 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 component

recognized by authorities who have jurisdiction for the
specific purpose for which they are used.

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 C7024E,F Detectors can be connected in

parallel.

3. This equipment generates, uses and can radiate

radio frequency energy, and if not installed and
used in accordance with the instructions, may
cause interference to radio communications. It has
been tested and found to comply with the limits for
a Class B computing device 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 may cause
interference, in which case the users, at their own
expense, may be required to take whatever
measures are required to correct this interference.

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.

Install the RM7824A where the relative humidity never
reaches the saturation point. The RM7824A is designed to
operate in a maximum 85 percent relative humidity,
continuous, noncondensing moisture environment.
Condensing moisture can cause a shutdown.

Do not install the RM7824A where it could be subjected to
vibration in excess of 0.5G continuous maximum vibration.

The RM7824A is not designed to be weather tight. If installed
outdoors, the RM7824A must be protected by an approved
weather-tight enclosure.

NOTE:

For installation dimensions, see Fig. 1 or 2.

1. Mount the subbase in any position except horizontally

with the bifurcated contacts pointing down. The standard
vertical position is recommended. Any other position
decreases the maximum ambient temperature rating.

2. Select a location on a wall, burner or in an electrical

panel. The Q7800 can be mounted directly in the
control cabinet. Be sure to allow adequate clearance for
servicing, installation, access and removal of the
RM7824A, dust cover, flame amplifier, flame amplifier
signal voltage probes, electrical signal voltage probes
and electrical field connections.

3. For surface mounting, use the back of the subbase as a

template to mark the four screw locations. Drill the pilot
holes.

4. Mount the subbase securely using four No. 6 screws.