Honeywell R7120D Installation Instructions Manual page 2

R7120D BURNER CONTROL MODULES
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.
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous condi-
tion.
2. Installer must be a trained, experienced, flame safe-
guard service technician.
3. After installation is complete, perform the System
Checkout provided in these instructions.
IMPORTANT
1. Two flame detectors can be connected in parallel
with the exception of Flame Detectors C7915,
C7927,C7961 and C7952.
2. 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.
3. 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.
GENERAL INSTRUCTIONS
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Close all manual fuel shutoff valve(s) before starting
the replacement of these controls.
Use extreme care while testing the system. Line voltage is
present on most terminal connections when power is on.
Ensure proper selection of configuration jumpers before
starting the burner operation.
CAUTION
Electrical Hazard.
Can cause equipment damage or failure.
Do not perform a dielectric test with the relay module
installed. Internal surge protectors can break down,
allowing relay module to fail the dielectric test and
destroy the internal lightning and high current
protection.
66-1196EF—01
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.
1. 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.
2. Loosen the mounting screw to remove the Fireye Con-
trol from the wiring base.
3. Check all wiring at the subbase for correct connections,
tight terminal screws, correct wire, and proper wiring
techniques. Replace all damaged or incorrectly sized
wires.
4. Replace faulty controllers, limits, interlocks, actuators,
valves, transformers, motors and other devices, as
required. Do not bypass limits and interlocks.
5. Be sure loads do not exceed the terminal ratings. Refer
to the label on the R7120D.
6. See Table 1 for recommended grounding practices. The
R7120D is a microprocessor based control and proper
grounding is important for safe, reliable operation.
Installing Honeywell Flame
Detectors
1. Fireye Infrared and Ultraviolet flame detectors SHOULD
NOT be used with the R7120D.
2. See the Honeywell instruction sheets for proper installa-
tion of the flame detector. NOTE: the wire for the Hon-
eywell F terminal is connected to the Fireye Subbase
terminal S1. The G terminal wire is connected to the Fir-
eye S2 terminal.
3. Applications that require shutter type flame detectors:
Connect one of the shutter leadwires to the terminal
screw found on the back of the R7120D. See Fig. 1.
TERMINAL SCREW
Fig. 1. R7120D terminal screw.
2
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