BASO H19 Series High Pressure Safety Pilot Valve - Manual (Page 3)

H19 Series BASO High Pressure Safety Pilot Valve Installation Instructions 3
3. Push the reset button and light the burner being
served. (If the appliance is equipped with a pilot
burner, light the pilot burner.) Continue to hold
the reset button for 30 to 45 seconds or until the
burner flame continues to burn when the button is
released.
IMPORTANT: Pilot burners designed for
low-pressure applications cannot be used without
suitable pressure regulation.
4. Extinguish the burner by closing the main
upstream manual shutoff valve. Verify that the
valve drops out within 90 seconds.
5. Relight the burner.
6. Check the millivoltage (mV) output of the
thermocouple and the milliampere (mA) dropout
range of the BASO power unit to ensure that they
meet the values listing in Table 1 and Table 2.
Step-by-step procedures for these checks are
included with the Y99AB-4 BASO Test Kit
Application Note.
7. Observe at least three complete operating cycles
to make sure that all components are functioning
properly.
8. Reset the thermostat to the desired setting before
leaving the installation.
Table 1: Thermocouple Output
Thermocouple mV Range
Lead
Type TurnDown Normal Not Less
Than
K15 4 mV 20-28 15
K16 4 mV 25-35 17
K19 4 mV 25-35 17
Table 2: Dropout Range
mA Range of Power
Unit Assembly Part Number
Low High
H19LA-1, H19NA-4,
H19RA-2, and H19TA-3
100 300
H19TB 50 165
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. This can be removed with a soft brush or a
vacuum.
• A flame approximately 1/2 in. (12.7 mm) high must
surround the thermocouple tip (Figure 2).
• Because this is an electrical connection, the
thermocouple lead connection to the BASO power
unit must be clean and free of grease.
Approximately
1/2in. (12.7 mm)
Figure 2: 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 listed in Table 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.