Table of Contents
Advertisement
S
XT I
, O
ERIES
NSTALLATION
PERATION AND
Pilot Trial for Ignition
• Jumpers JP6 and JP7 are used by the factory
only to select the PTFI for the M4RT1. The factory
set, default PTFI time is 10 seconds (JP6
installed, JP7 not installed). The PTFI time may
only be set by the factory.
Recycle/Non-recycle Operation
• Jumper JP8 is used to select either Recycle or
Non-Recycle operation of the M4RT1. The factory
set, default is Recycle operation (JP8 installed).
To select Non-Recycle operation, cut jumper JP8.
17.3.2.3 Fireye® M4RT1 Flame Safeguard Opera-
tion (FM ≥ 2.5MBH and XL ≥ 1MBH)
The following will describe the internal operation of a
flame safeguard control (that has had its jumpers
changed to comply with the agency requirements)
and the external functions that will take place. Refer
to the drawing below to follow the steps. We will just
trace the electromechanical steps and not the
electronic network.
• All interlocks, control relays and safety limits are
closed. Power is supplied to terminal #7 of the
flame safeguard.
• The Operating Control LED illuminates.
• The electronic network is now powered up which
illuminates the Air Flow LED.
• Following a time delay period (purge cycle) 7
seconds. The electronic network closes a contact
that powers up terminal #3 and terminal #4 in the
safeguard control.
• Terminal #3 powers up the equipment's pilot gas
solenoid valve which opens allowing gas to flow.
• Terminal #4 powers up the ignition module
creating the spark at the burner.
• This lasts for 10 seconds. This cycle is called trial
for ignition. During this time period, the PTFI LED
is illuminated.
• When the flame sensor detects a pilot flame, the
signal is sent back to the safeguard control. The
electronic network illuminates the FLAME LED.
• It closes an internal contact, which powers up
terminal #5 in the control. This terminal powers up
the main gas valves allowing the main burner to
come on.
54
S
M
ERVICE
ANUAL
• At the same time that the contact in step b closes,
the electronic network opens a contact, which
powers terminal #4. This shuts off the power to
the ignition module, which stops the spark at the
burner. The safeguard control at this point
monitors the flame.
NOTE: If a pilot flame is not detected during the 10
second trial for ignition, the pilot gas solenoid valve
and the ignition module are turned off. A safety
lockout occurs which shuts down the electronic
network. The only LED that will be illuminated at this
time will be the OPERATING CONTROL. 30 seconds
after the lockout has activated, the alarm circuit is
powered up, illuminating the ALARM LED. Manual
reset is now required. Wait 10 seconds before
resetting the control to allow the lockout switch to
cool down.
Advertisement
Table of Contents
