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RM7897A,C 7800 SERIES RELAY MODULES
Humidity: 85% relative humidity continuous, noncon-
densing.
Vibration: 0.5G environment.
SIL 3 Capable:
SIL 3 Capable in a properly designed Safety Instru-
mented System. See form 65-0312 for Certificate
Agreement
Approvals:
Underwriters Laboratories Inc. Listed: File No. MP268,
Guide No. MCCZ.
Factory Mutual Approved: Report No. 1V9A0.AF.
Swiss RE (formerly IRI): Acceptable.
Federal Communications Commission: Part 15, Class
B, Emissions.
INSTALLATION
When Installing this Product...
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 the 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.
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Follow applicable safety requirements when
installing a control on a burner to prevent death or
severe injury.
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or equipment
damage.
Disconnect power supply before beginning
installation. More than one disconnect may be
required.
IMPORTANT
1. Wiring connections for the relay modules are
unique; refer to Fig. 2 and 3 or the appropriate
Specifications for proper subbase wiring.
2. Wiring must comply with all applicable codes,
ordinances and regulations.
3. Wiring must comply with NEC Class 1 (Line Volt-
age) wiring.
4. Loads connected to the RM7897A,C must not
exceed those listed on the RM7897A,C label or the
Specifications; see Table 1.
5. Limits and interlocks must be rated to simultane-
ously carry and break current to the ignition trans-
former, pilot valve, and main fuel valve(s).
32-00158—03
6. All external timers must be listed or
component-recognized by authorities who have
proper jurisdiction.
7. 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).
8. Two flame detectors can be connected in parallel
with the exception of Flame Detectors C7015,
C7915, C7927, C7961 and C7952.
9. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and
used in accordance with the instructions, can
cause interference with 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.
10. This digital apparatus does not exceed the Class B
limits for radio noise for digital apparatus set out
in the Radio Interference Regulations of the Cana-
dian Department of Communications.
Location
Humidity
Install the relay module where the relative humidity never
reaches the saturation point. The relay module is designed
to operate in a maximum 85% relative humidity
continuous, noncondensing, moisture environment.
Condensing moisture can cause a safety shutdown.
Vibration
Do not install the relay module where it can be subjected
to vibration in excess of 0.5G continuous maximum
vibration.
Weather
The relay module is not designed to be weather tight.
When installed outdoors, protect the relay module in an
approved weather-tight enclosure.
Mounting Wiring Subbase
1. Mount the subbase in any position except horizon-
tally 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 electrical panel.
The Q7800 can be mounted directly in the control
cabinet. Be sure to allow adequate clearance for ser-
vicing, installation, access or removal of the relay
module, Expanded Annunciator, Keyboard Display
Module, flame amplifier, flame amplifier signal volt-
age probes, Run/Test Switch, electrical signal volt-
age probes and electrical field connections.
2
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