Overview of Primary Product

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SYSTEM INSTALLATION
In this section, the necessary procedures are detailed to integrate a Multi-Burner Control into a
burner system; Figures 5 and 6 illustrate the various terminal strips mentioned followed by suggested
wiring diagrams.
Shut off the power supply before any module is removed or replaced from the unit, including the
remote display.
POWER SUPPLY
All input power must be single phase 120 VAC, 60 Hz. All circuits must have a common 15 amp fuse
and disconnect. The neutral must be grounded. Do not use solid-state triac output devices in any of
the input circuits. 120 VAC wiring must be at least 90°C 16 AWG minimum and satisfy all applica-
ble codes.
INTERLOCKS AND LIMIT SWITCH INPUT
Interlocks are generally pressure or temperature switches which, when activated, start the burner.
Limit switches are generally pressure, temperature and other switches which, when activated, stop
the burner. The interlocks and limit switches are wired in series. A break in this circuit will shut the
burner down, but will not produce an alarm. This input is considered the normal operation control
input to the Multi-Burner Control System.
COMBUSTION AIR SWITCH INPUT
This input is for monitoring the combustion air switch separately from other interlocks and limits.
When wired to this input, the air switch will be proven open before start-up and after shutdown. It
will also be proven closed 10 seconds after the combustion air blower is energized.
If the air switch opens during the main firing cycle, the system will either lockout or recycle, depend-
ing on the DIP switch selection.
If this terminal is not used, place a jumper between the combustion blower output (terminal 3 on ter-
minal strip J2) and the air switch input (terminal 2 on terminal strip J1).
If the combustion air blower is controlled outside of the Multi-Burner Control System, then the air
switch must be wired between the combustion blower output and the air switch input. Connecting the
air switch in this manner will prevent the open contact (air short) check on the switch.
MAIN VALVE PROOF-OF-CLOSURE
The system can be wired to check for the proof of valve closure (POVC) switch on the main gas
valve prior to start-up and after the end of the burner cycle. To use this feature the POVC switch
must be connected to the POVC switch input (terminal 3 on terminal strip J1). If this feature is not
used, a jumper must be placed between terminals 2 on terminal strip J2 and 3 on terminal strip J1.
IGNITION WIRING
Route ignition wiring a sufficient distance from all sensors and other low voltage wiring to avoid
electrical interference, which may cause erratic operation of the Multi-Burner Control System. Do
not connect multiple ignition coils in excess of output relay contact rating.
LOW FIRE INPUT
It is possible to wire the system for checking low fire start position prior to pilot ignition. To use this
feature, the low fire start switch must be connected to the low fire start input (terminal 4 on terminal
strip J1). If this feature is not used, a jumper must be placed between terminals 1 and 4 on terminal
strip J1.
Caution: Installation and maintenance must conform with the National Electrical Code and
all other national and local codes and authorities having jurisdiction.