Startup
40
RRU-SVX01F-EN
Settings and Adjustments
The relay module has three site-configurable jumper
options.
If necessary, clip the site-configurable jumpers with side
cutters and remove the resistors from the relay module.
Notes:
•
Clipping and removing a site-configurable jumper
enhances the level of safety.
•
Clipping and removing a jumper after 200 hours of
operation causes a non-resettable fault 100. The relay
module must then be replaced.
Operation of the Direct Spark Ignition
Control Gas Valve
On a call for heat, a 30-second pre-purge is initiated. Upon
completion of the pre-purge, the gas valve and 60 Hz spark
are energized. When flame is detected, the control enters
the steady state heating condition. Steady state heating
will continue until the call for heat is satisfied.
If ignition is not achieved within 10 seconds, the control
valve shuts off the gas and locks out. If the trial for ignition
has been accomplished without ignition, the control shuts
off all outputs and enters lockout. Reset is accomplished
by cycling the power off for a minimum of 5 seconds.
If flame is lost once it has been established, the control will
shut off the gas valve within 0.8 seconds and locks out.
If flame is sensed during a purge period when no flame
should be present, the control will remain in a purge with
the gas valve off until the false flame disappears.
If the gas valve is found to be powered when it should be
off, or not powered when it should be on, the control will
Figure 21.
Sequence status LEDs
Figure 22.
Selectable site-configurable jumpers
Table 7.
Jumper options
Jumper #
Description
Intact
Clipped
JR1
Pilot Flame Establishing
Period (PFEP)
10 seconds
4 seconds
JR2
Flame Failure Action
Recycle
Lockout
JR3
Airflow Switch (1LK) Failure
Recycle
Lockout
Figure 23.
Relay module plug-in diagram
WARNING
Combustible Materials!
Failure to maintain proper clearance between the unit
and combustible materials could cause a fire which
could result in death, serious injury, or property
damage.
Refer to unit nameplate and installation instructions for
proper clearances.
