User Manual

4 H19 Series BASO Automatic Shutoff Pilot Gas Valve Installation Instructions
6. Check the millivoltage output of the thermocouple
and milliampere dropout range at the BASO
power unit terminal to be sure 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
(Part No. 24-8711-838).
7. If the heater is equipped with a thermostat, return
it to the desired setting after the catalytic reaction
has been established for at least one hour.
Pilot Gas Adjustment
A rotor B valve is provided on certain models to
manually adjust pilot flame size. Off and On positions
are indicated on the valve. By slowly turning the
adjustment knob, a desirable flame can be obtained.
ON OFF
Reset
Button
Inlet
On/Off
Positions
Thermocouple
Connection
Pilot Tap
Connection
Outlet
Rotor B Valve
Figure 3: Typical H19 Valve with Rotor Valve
Pilot Servicing
If pilot flame problems occur, check the followin g:
• If the pilot flame burns yellow, it may be due to
dirt or lint covering the lower portion of the pilot
burner. Remove this using a soft brush or a
vacuum.
• A flame approximately 1/2 in. (12.7 mm) high
must surround the thermocouple tip (Figure 4 ).
• Because this is an electrical connection, the
thermocouple lead connection to the BASO
power unit must be clean and free of grease.
Approximately
1/2 in. (12.7 mm )
Figure 4: Flame Position
Repairs and Replacement
!
WARNING: Risk of Explosion or Fire.
Shut off the gas supply at the main manual shutoff
valve before installing or servicing the H19. 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.
Field repairs must not be made to the H19 valve. If
the thermocouple meets the output in Ta ble 1 and the
valve does not function, replace the entire valve. Any
attempt to repair this assembly voids the
manufacturer’s warranty. For a replacement valve,
contact the original equipment manufacturer or the
nearest BASO Gas Products distributor.