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7. Check the millivoltage output of the thermocouple
and milliampere dropout range at the BASO power
unit terminal to see that they meet the values in
Table 1 and Table 2. Step-by-step procedures for
these checks are included with the Y99AB BASO
Test Kit.
8. Relight the pilot.
9. Observe at least three complete operating cycles
to make sure that all components are functioning
correctly.
10. Reset the thermostat to a normal temperature
setting before leaving the installation.
Repairs and Replacement
Field repairs must not be made to the L62GB safety
shutoff device. If the thermocouple meets the output
listed in Table 1 and the valve does not function,
replace the entire device. Any attempt to repair this
assembly voids the manufacturer's warranty. For a
replacement safety shutoff device, contact the nearest
BASO Gas Productsdistributor.
Check the millivoltage output of the thermocouple and
milliampere dropout range at the BASO power unit
terminal to see that they meet the values in Table 1
and Table 2. If the readings do not meet these values,
replace the thermocouple and/or the safety shutoff
device.
Table 1: Thermocouple Output
Thermocouple
Lead Type
Turn
Down
K15
4 mV
K16
4 mV
K19
4 mV
Table 2: L62GB Dropout Range
mA Range of Power Unit Assembly
Low
100
Pilot Servicing
If pilot flame problems occur, check the following:
•
If the pilot flame burns yellow, it may be due to dirt
or lint covering the lower portion of the pilot
burner. Remove dirt and lint using a soft brush or
a vacuum cleaner.
mV Range
Not Less
Normal
Than
20-28
15
25-35
17
25-35
17
High
300
L62GB BASO Safety Shutoff Device Installation Instructions
•
A flame approximately 0.5 in. (12.7 mm) high must
surround the thermocouple tip (see Figure 2).
•
Because this is an electrical connection, the
thermocouple lead connection to the BASO power
unit must be clean and free of grease.
1/2 in. (12.7 mm)
Figure 2: Flame Position
Replacement Procedure
!
WARNING: Risk of Explosion or Fire.
Shut off the gas supply at the main manual shutoff
valve before installing or servicing the L62GB.
Failure to shut off the gas supply can result in the
release of gas during installation or servicing, which
can lead to an explosion or fire, and may result in
severe personal injury or death.
!
CAUTION: Risk of Electrical Shock.
Disconnect power supply before making electrical
connections to avoid electrical shock.
!
WARNING: Risk of Explosion, Fire, or
Electric Shock. Label all wires before they are
disconnected when replacing the L62GB. Wiring
errors can cause improper or dangerous operation
and may result in an electric shock, fire, or explosion
leading to severe personal injury or death.
When necessary, replace the safety shutoff device as
follows:
1. Turn off power to the appliance.
2. Close the main manual shutoff valve and the pilot
valve.
3. Disconnect the thermocouple lead from the safety
shutoff device.
4. Remove the cover.
Approximately
3
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