Wiring - Honeywell 7800 Series Manual

!
CAUTION
1. Disconnect the power supply before beginning
installation to prevent electrical shock, equip-
ment and control damage. More than one power
supply disconnect may be involved.
2. Wiring connections for the RM7840 are unique;
therefore, refer to Figs. 6, 7, 8, 9 or 10 or the cor-
rect 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 RM7840 must not ex-
ceed those listed on the RM7840 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.
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 safe-
guard control and the main fuel valve(s).
2. Two detectors can be connected in parallel with the
exception of Infrared detectors (C7015A).
3. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause interfer-
ence 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 interfer-
ence 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 mea-
sures are required to correct this interference.
1. a. For proper subbase wiring, refer to Figs 7, 8, 9,
or 10.
b. For proper remote wiring of the Keyboard Display
Module, refer to the Specifications for the Key-
board Display Module (65-0090), Communica-
tion Interface Base Unit (63-2278), DATA CON-
TROLS MODULE™ (65-0091) or Extension
Cable Assembly (65-0131).
2. Disconnect the power supply from the main discon-
nect before beginning installation to prevent electrical
shock and equipment damage. More than one disconnect
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 De-
partment of Communications.
HUMIDITY
Install the RM7840 where the relative humidity never
reaches the saturation point. The RM7840 is designed to
operate in a maximum 85% RH continuous, noncondensing,
moisture environment. Condensing moisture may cause a
safety shutdown.
VIBRATION
Do not install the RM7840 where it could be subjected to
vibration in excess of 0.5G continuous maximum vibration.
WEATHER
The RM7840 is not designed to be weather tight. If
installed outdoors, the RM7840 must be protected by an
approved weather-tight enclosure.
MOUNTING WIRING SUBBASE
NOTE: For installation dimensions, see Figs. 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 de-
creases 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 servicing,
installation, access and removal of the RM7840, Dust
Cover, 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. Drill the
pilot holes.
4. Securely mount the subbase using four no. 6 screws.
may be involved.
3. All wiring must comply with all appropriate electrical
codes, ordinances and regulations. Wiring, where required,
must comply with NEC, Class 1 (Line Voltage) wiring.
4. Recommended wire size and type:
a. All line voltage terminals use no. 14, 16, or 18 cop-
per conductor (TTW60C or THW75C or THHN90C)
600 volt insulation wire. For high temperature
installations, use wire selected for a temperature
rating above the maximum operating temperature.
All leadwires should be moisture resistant.
11
RM7840E,G,L,M
INSTALLATION • WIRING

Wiring

65-0087—2