15
®
WIRING - UV SCANNERS
To connect the scanner to the control, the UV1AL scanner is supplied with 36" or 72"
(0.9 m or 1.8 m) of flexible cable. The UV90L is supplied with a terminal block. Use two #18 AWG
conductors to connect the UV90L to the control. The UV5 is supplied with 80” (2m) of flexible
cable (detachable).
If it is necessary to extend the scanner wiring, the following instructions apply:
There is no polarity associated with the scanner wiring, except for the UV5. Scanner wires must be
installed in a separate conduit. The wires from several scanners may be installed in a common con-
duit.
1.
Selection of Wire
a. Wiring: For extended scanner wiring up to 500 feet (152 M), and for shorter lengths to reduce
signal loss, use a shielded wire (Belden 8254-RG62 coaxial cable, or equal) for each scanner
wire. The ends of the shielding must be taped and not grounded.
b. Avoid asbestos insulated wire.
c. Multi-conductor cable is not recommended without prior factory approval.
2.
High voltage ignition wiring must not be installed in the same conduit with flame detector
wires.
SYSTEM OPERATION
The fixed series timings determine the functional operation of the BurnerPRO control (e.g. purge
timing, trial for ignition timings, etc.) The BurnerPRO offers a single multi-functional button and its
functions are as follows:
RESET
The BurnerPRO control provides two methods of resetting the control in the event of a safety lock-
out: The push button reset and terminal 21 remote reset. Both reset methods can be used to stop the
control in its firing sequence at anytime to force a user/emergency lockout. A reset of the control can
be accomplished by momentarily pressing the reset button or engaging the remote reset terminal.
CHECK MODE
The push button reset switch has an added feature that allows the user to freeze the operational
sequence at certain times (Purge, Ignition, PTFI, and MTFI). This is known as CHECK MODE and
it is designed to aid in set-up, start-up and check-out of the burner and its associated interlocks. This
feature is very useful in pilot aiming and adjustment during commissioning or maintenance.
The check mode rules are:
•
If the push button reset is held for at least 3 seconds, the status LED changes from green to yel-
low to signal that the control is in check mode.
•
Momentarily pressing the push button reset while in check mode transitions the control into nor-
mal operating sequence, thus disabling check mode.
•
The control locks out during Purge, Ignition, or PTFI states if check mode is active longer than
30 minutes
•
The control allows check mode in MTFI for 2 minutes. The control automatically cancels check
mode after 2 minutes in MTFI state and resumes normal operation.
•
When in check mode during PTFI or MTFI states, the control uses the
open, close, auto, igni-
tion, and flame
LEDs to annunciate the flame signal strength. Every illuminated LED (starting
with the flame LED) represents a 20% signal strength.
