2 - 2 Wiring
8
Chapter 2. MOUNTING AND WIRING
WARNING
Wire terminals 1 and 2 so that they receive power continuously whenever the
power switch is turned on. This is absolutely necessary to ensure operation
of the self-check circuits at startup.
Therefore, do not wire a thermostat between the power switch and terminal 1
or 2. Doing so might cause a serious combustion equipment accident.
Connect loads (ignition transformer, solenoid valve, etc.) directly to the output
terminals of this device. If they are not directly connected, combustion safety
cannot be ensured.
CAUTION
If timers and auxiliary relays are needed for additional functions, select ones
with high reliability, and be sure to design the circuit correctly
Make sure the load connected to each terminal does not exceed the rating
indicated in the specifications.
When installing and wiring, be sure to follow the instructions in this manual
and in the user's manual for the combustion equipment.
Follow all applicable regulations when doing the wiring work.
Run the high-voltage ignition transformer cable separately and keep it at
least 10 cm away from this device.
Make sure that ignition transformer high-voltage cables are properly
connected to prevent faulty contact. Faulty contact might generate high-
frequency radio waves which can cause malfunction.
The ignition transformer ground lead should be connected directly to the
burner body or to a metallic part electrically connected to the burner body.
Keep power lines and ignition transformer high-voltage cables separate from
the flame detector wires.
Always supply electric power at the voltage and frequency stated on the
model label of this device.
Always connect the power supply last. Otherwise, touching a terminal
accidentally could result in electric shock or damage.
In keeping with technical standards for electrical equipment, the burner body
must have an earth ground connection with a resistance of less than 100
Ω
.
After the wiring is complete, be sure to check that it is correct. Incorrect
wiring may cause damage or faulty operation.
