Installation - Honeywell 7800 Series Installation Instructions Manual

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
Explosion or Fire Hazard.
Can cause severe injury, death or property
damage.
To prevent possible hazardous burner operation,
verify safety requirements each time a control is
installed on a burner.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Disconnect the power supply before beginning
installation. More than one power supply
disconnect can be required.
IMPORTANT
1. Wiring connections for the relay modules are
unique; refer to Fig. 4 or the appropriate Specifica-
tions for proper subbase wiring.
2. Wiring must comply with all applicable codes,
ordinances and regulations.
3. Wiring must comply with NEC Class 1
(Line Voltage) wiring.
4. Loads connected to the RM7838B,C must not
exceed those listed on the RM7838B,C label or the
Specifications; see Table 4.
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).
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 Infrared Flame Detectors
(C7015, C7915) Ultraviolet Flame Detectors
(C7927, C7961), and Visible Light Detector
(C7962).
RM7838B, RM7838C 7800 SERIES RELAY MODULES
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 can 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.
See Fig. 3 for the internal block diagram of the
RM7838B,C Relay Module.
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
horizontally with the bifurcated contacts pointing
down. The standard vertical position is
recommended.
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
service, installation, access or removal of the
RM7838B,C, Expanded Annunciator, KDM, flame
amplifier, flame amplifier signal voltage probes,
Run/Test Switch, 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, then
drill the pilot holes.
4. Securely mount the subbase using four no. 6 screws.
3 32-00211—01