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EC7823A;RM7823A 7800 SERIES RELAY MODULES
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 property damage, severe injury or
death.
To prevent possible hazardous burner operation, verify
safety requirements each time a control is installed on
a burner.
WARNING
Electrical Shock Hazard/Equipment Damage
Hazard.
Can cause severe injury, death or property
damage.
Disconnect the power supply before beginning
installation. More than one power supply disconnect
may be required.
IMPORTANT
1. Wiring connections for the relay modules are unique;
refer to Fig. 2 or the correct 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 Voltage)
wiring.
4. Loads connected to the EC/RM7823A must not
exceed those listed on the EC/RM7823A label or the
Specifications; see Table 3 or 4.
5. All external timers must be listed or
component-recognized by authorities who have
proper jurisdiction.
6. 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).
7. Two flame detectors can be connected in parallel
with the exception of Infrared Flame Detectors
(C7015).
8. 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.
9. 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 Canadian
Department of Communications.
66-1086—2
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 could 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, the relay module must be protected by an
approved weather-tight enclosure.
Mounting Q7800 Wiring Subbase
1. Mount the Q7800 Subbase in any position except
horizontally with the bifurcated contacts pointing down.
The standard vertical position or with the bifurcated
contacts point up is recommended. Any other position
decreases the maximum ambient temperature rating.
2. Select a location on a wall, burner or electrical panel.
The wiring subbase can be mounted directly in the
control cabinet. Be sure to allow adequate clearance
for servicing, installation, access or removal of the
EC/RM7823A, dust cover, flame amplifier, flame
amplifier 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. Securely mount the subbase using four no. 6 screws
(not provided).
Wiring Subbase
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or equipment/
control damage.
Disconnect the power supply before beginning
installation. More than one power supply disconnect
may be required.
1. For proper subbase wiring, refer to Figs. 2, 3, 4 or 5.
2. For proper remote wiring of the Keyboard Display
Module, refer to the Specifications for the Keyboard
Display Module (65-0090), Network Interface Unit
(63-2278), Data ControlBus Module™ (65-0091) or
Extension Cable Assembly (65-0131).
3. Disconnect the power supply from the main disconnect
before beginning installation to prevent electrical shock
and equipment damage. More than one disconnect may
be required.
4. All wiring must comply with all applicable electrical
codes, ordinances and regulations. Wiring must comply
with NEC, Class 1 (Line Voltage) wiring.
5. For recommended wire size and type, see Table 1.
6. For recommended grounding practices, see Table 2.
2
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