L.B. White Guardian with Smart Sense / Direct Connect - Spark Ignition (250K) - Manual (Page 14)

Follow steps 1 - 6 on initial start-up after heater installation
by a qualified gas heater service person. For normal start-
up, set the building controller to call for heat. The heater
will start.
1. Open all manual fuel supply valves and check for gas
leaks using approved leak detectors.
2. Connect the electrical cord to an approved electrical
outlet.
3. S e t t h e b u i l d i n g c o n t ro l l e r to d e s i r e d ro o m
temperature.
4. This heater includes a direct spark ignition control
(DSI) control module for purposes of controlling the
timing of the ignition process of the heater as well as
moniotoring safety functions. The controller is located
within the control box.
On the ignition control is a red light emitting diode
(LED). The LED indicates the staus of the heaters and
is visible external of the control box through the
plastic window on the box. A constant light from the
LED indicates the heater is functioning correctly. Any
blinking light pattern of the LED indicates a problem
in the operation of the heater.
Refer to the troubleshooting decal on the heater for
assistance in troubleshooting, or refer to the
troubleshooting flow charts within this manual. Only
qualified and properly trained personnel shall service
or repair the heater.
5. On a call for heat, the motor will start up and run for
five (5) seconds. This pre-purge is a safety feature
and a normal operational characteristic prior to
ignition taking place. After five seconds, the igniter
will begin to spark with ignition occuring shortly after.
NOTE: It is normal for air to be trapped in the gas
hose on new installations. The heater may
attempt more than one trial for ignition before
the air is finally purged from the line and
ignition takes place.
6. The ignition control will make up to three trials for
ignition. Each trial for ignition will take approximately
10 seconds. The first three trials for ignition will
occur within 40 seconds if ignition is not achieved. A
15 minute wait period will then begin after the third
trial for ignition has taken place. After the 15 minute
time span has elapsed, three more trials for ignition
will occur. If ignition is not achieved at this final trial,
the system will lock out, and a three flash pattern will
be indicated by the LED.
If the heater is to be shut down for cleaning, maintenance or
repair, follow steps 1 - 4. Otherwise, set the building
controller to off.
1. Close all manual fuel supply valves.
2. With the heater lit, allow heater to burn off excess
fuel in gas supply hose.
3. Set the building controller to off.
4. Disconnect the heater from the electrical supply.
13
Start-Up Instructions
Shut-Down Instructions