BASO L61LL - Manual (Page 3)

L61LL BASO Safety Shutoff Device Installation Instructions 3
Setup and Adjustments
Checkout
!
WARNING: Risk of Explosion or Fire.
Follow this or an equivalent checkout procedure
after installation. Before leaving the installation,
verify that the L61LL functions properly and that the
system has no gas leaks. Gas leaks can lead to an
explosion or fire, and may result in severe personal
injury or death.
Make sure all components are functioning properly by
performing the following test.
1. Open the main manual shutoff valve (A valve).
2. Test all joints and connections for leaks with a
soap solution.
3. Set the thermostat to the lowest temperature
setting.
4. Close the main manual shutoff valve (A valve) and
the pilot valve (B valve [see Figure 2]) and wait at
least five minutes for unburned gas to escape from
the appliance.
5. Reopen the B valve and ignite the pilot gas. In
approximately one minute, the L61LL device
closes, establishing a circuit to the main gas valve.
6. When the circuit to the main gas valve is
established, open the A valve. The main burner
will ignite from the pilot burner when the
thermostat calls for heat.
7. Disconnect the thermocouple from the L61LL. The
main valve should close immediately. If it closes,
reconnect the L61LL. If it does not close, check for
wiring errors and repeat
Steps 1 through 5.
8. Make sure brass hex nut is tight for good
continuity. Do not over tighten.
9. 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-4
BASO® Test Kit Application Note.
10. Relight the pilot.
11. Observe at least three complete operating cycles
of the appliance to make sure all components are
functioning correctly.
12. Reset the thermostat to a normal temperature
setting before leaving the installation.
Repairs and Replacement
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,
Table 2 and Table 3. If the reading does not meet
these values, replace the thermocouple and/or the
safety shutoff device.
Table 1: Thermocouple Output
Thermocouple mV Range
Lead
Type Turn
Down
Normal
Not Less
Than
K15 4 mV 20-28 15
K16 4 mV 25-35 17
K17 4 mV 30-40 25
K19 4 mV 25-35 17
Note: In high temperature locations, use
K15 or K16 Series.
Table 2: L61LL Dropout Range
mA Range of Power Unit Assembly
Low High
75 200
Table 3: L61LL Pull-In Range
mA Range of Power Unit Assembly
Low High
220 400