BASO BGH2UNCNTRLHT-01 - Manual (Page 10)

10 BGH2UNCTRLHT-01 Universal Hot Surface Ignition Control Installation Instructions
Checkout
!
WARNING: Risk of Explosion or Fire.
Verify that there are no gas leaks by testing with
appropriate equipment. Never use a match or lighter
to test for the presence of gas. Failure to test
properly can lead to an explosion or fire and may
result in severe personal injury or death.
Make sure all components function properly by
performing the following checks.
1. Before starting the appliance, perform a safety
inspection of piping, burners and venting. Check
for gas leaks, etc. Check all wiring for proper
connections. Be sure the system is properly
grounded, including ground connection to the
burner ground (Terminal 1).
2. With the gas and thermostat off, turn on power to
the appliance.
3. Turn the thermostat to a high setting and verify
that the control goes through the operating
sequence to a shutoff condition.
Note: The burner does not light because the
gas is off.
4. Turn off the thermostat.
5. Turn on the gas and purge gas lines of all air.
6. Check for gas leaks on all pipe joints upstream of
the gas valve with a soap solution.
7. Turn the thermostat to the highest setting and
verify successful ignition and a normal run
condition for at least 5 minutes. If the appliance
fails to run, see the Troubleshooting section.
8. Check for gas leaks on all pipe joints
downstream of the gas valve with a soap
solution.
9. Turn the thermostat down for at least 30 seconds
and then back up again. Verify successful
ignition at least five times.
10. Return the thermostat to a normal temperature
setting before leaving the installation.
!
WARNING:
The control module can not be serviced by user. If
any faults are detected, the control module must be
replaced. If control module has been opened or any
attempts to repair are done, the warranty is void.
Operation
Operating Mode Definitions
The following definitions describe the operating
conditions.
• Pre-Purge: Initial time delay between the
thermostat contact closure (Call for Heat) and the
HSI (Hot Surface Igniter) and pilot valve are
activated. The controls “LED” will flash green
“ON” and “OFF” at 0.5 s rate.
• Igniter Warmup (Timed Ignition): The time
allowed for the hot surface igniter to heat up
before the Trial-For-Ignition sequence is
activated. The controls “LED” will flash green
“ON” and “OFF” at 0.5 s rate.
• Trial-For-Ignition (TFI): This is the total time the
pilot valve and hot surface igniter are “ON”
(energized), and flame sense sequence is
activated in an attempt to light the pilot. The
control attempts to prove flame within the Trial-
For-Ignition time. The “LED” will flash green at
0.5 second “ON” and 0.5 second “OFF”.
• Flame Sensed: With a flame present, a current
path is connected between the “Igniter” and “Main
Burner” ground on “Internal Flame Sense”
Models, or between a “Flame Sense Rod” and
“Main Burner” ground on “Remote Flame Sense”
Models. The “Main Burner” and gas valve remain
on as long as a flame is present. When the
thermostat opens (Call for Heat ends) the control
turns “OFF” (de-energizes) the gas valve, there by
extinguishing the flame.
• 100% Shutoff (Flame Not Sensed) With 1
Ignition Trial (Bad Flame/No Flame): If the
control does not prove the presence of pilot
burner flame within the “Trial-For-Ignition” time,
then both gas valve relays are turned “OFF”
(de-energized) and the control goes into Lockout
mode. See Troubleshooting Guide for possible
faults.