Wiring - Honeywell 7800 SERIES Product Data

IMPORTANT
1. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used
in accordance with these instructions, may cause
interference for radio communications. It has been
tested and found to comply with the limits of 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 user, at their own
expense, may be required to take whatever
measures are required to correct this interference.
2. This digital apparatus does not exceed the Class B
limits for radio noise, set out in the Radio Interfer-
ence Regulations of the Canadian Department of
Communications.
3. If a control, limit or interlock is not used with the
installation, a jumper must be installed in the S7830
wiring subbase. DO NOT PLACE JUMPER WIRES
ACROSS THE INSTALLATION CONTROL, LIMITS
AND INTERLOCKS. For example, if Auxiliary Limit #
1(Aux Limit#1) is not used, place a jumper wire
between terminals 6 and 7 on the S7830 wiring
subbase.
4. For straight gas burner applications, the oil limit and
interlock inputs DO NOT need to be jumpered.
5. For straight oil burner applications, the gas limit and
interlock inputs DO NOT need to be jumpered.
6. For combination gas-oil burner applications, a
double pole, double throw (dpdt) fuel select switch is
required. See Fig. 3.
7. For communications ControlBus connections in
excess of 100 feet (30 meters), a 120 ohm, 1/4 watt
minimum, termination resistor may be required
across terminals 1(a) and 2(b) of the electrical con-
nectors. Cable shield must be terminated to ground
at both ends. If shielded cable is NOT used, use
three-wire twisted cable.
8. The 7800 SERIES Relay Module control point can
be tied into the S7830:
• For dual fuel burners, from terminals 6 to 11,
inclusive.
• For single fuel burners, from terminals 6 to 9,
inclusive.
Humidity
Install the S7830 where the relative humidity never reaches
the saturation point. The S7830 is designed to operate in a
maximum 85% relative humidity, continuous, noncondensing,
moisture environment. Condensing moisture can cause
erratic operation.
Vibration
Do not install the S7830 where it could be subjected to
vibration in excess of 0.5G continuous, maximum.
Weather
The S7830 is not designed to be weather tight. If installed
outdoors, the S7830 must be protected by a weather-tight,
NEMA 4, enclosure.Mounting Wiring Subbase
NOTE: For installation dimensions, see Fig. 1 or 2.
7800 SERIES S7830 EXPANDED ANNUNCIATOR
1. Mount the subbase in any position except horizontally
with the bifurcated subbase contacts pointed down (on
the row F). A vertical mounting position is recom-
mended. Any other position decreases the maximum
ambient temperature rating.
2. Select a location on a wall, burner surface, or within an
electrical control panel. Be sure to allow adequate
clearance for electrical voltage probe tests, electrical
field connections, and wiring of the RS-485 ControlBus
to the 7800 SERIES Relay Module. The S7830 must be
within 1000 feet (305 meters) of the 7800 SERIES
Relay Module for proper communication of first-out
annunciation and current burner status information.
3. Use the back of the subbase as a template to mark the
four screw locations and drill pilot holes.
4. Insert four No. 6 screws for mounting, and tighten
securely.

WIRING

WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect the power supply from the main
disconnect before beginning installation to prevent
electrical shock and equipment damage. More than
one disconnect can be required.
1. Refer to Fig. 3 for proper subbase wiring. The system
wiring must follow the order shown in Fig. 3.
NOTE: With the S7800A1142 Keyboard Display Module, you
can name the limits and interlocks to match your
system.
2. All wiring must comply with all appropriate electrical
codes, ordinances and regulations. Wiring, where
required, must comply with NEC Class 1 (Line Voltage).
3. Recommended wire size and type:
a. Line Voltage:
(1) Use No. 14, 16 or 18 gauge (TTW60C or
THW75C or THHN90C), 600 volt insulation for
all line voltage terminals.
b. RS-485 ControlBus:
(1) Use three-wire twisted cable. Some installations
may require shielded cable; use Belden 8771 or
equivalent. For connections in excess of 100
feet (30 meters), a 120 ohm, 1/4 watt minimum,
termination resistor may be placed across
terminals 1(a) and 2(b) of the electrical
connectors.
4. Recommended grounding practices:
a. The earth ground provides for a connection between
the wiring subbase and the control panel or the
equipment. The earth ground wire must be capable
of conducting the current to blow the 15A type SC
fast blow fuse (or breaker) in the event of an internal
short circuit.
b. The S7830 needs a low impedance ground
connection to the equipment frame which, in turn,
needs a low impedance ground connection to earth
ground. For a ground path to be low impedance at
RF frequencies, the connection must be made with
minimum length conductors that have a maximum
5 65-0101—03