63
TRIAD Boiler Systems, Inc.
West Chicago, IL
www.triadboiler.com
For setting and testing the high AND lOW gas pressure switches:
Close the main manual gas shutoff valve and install a manometer or calibrated gage in test port that will
see the same pressure as the switch. Reopen the main manual gas shutoff valve. When finished, close the
main manual shutoff valve, remove calibrated gage or manometer, and restore the test plug. Restore the
main manual gas valve to full open.
Setting and testing the low gas pressure switch:
Cycle the burner to high fire and a gas pressure reading. Using the main manual gas shutoff valve, throttle
down the gas flow to a point there the reading is approximately 10% below the full open reading. Then
adjust the low gas pressure switch until it breaks and shuts down the burner. Restore main manual gas
shutoff valve to full open.
Set the burner to high fire and use the main manual gas shutoff valve to throttle the gas flow. The low gas
pressure switch should immediately break and shut down the burner at about 10% reduced pressure.
For setting and testing of the high gas pressure switch:
If the high gas pressure switch (HGPS) is located downstream of the metering valve, adjustment and
testing of the HGPS is performed at high fire. If the HGPS is located upstream of the metering valve, then
adjustment and testing is performed at low fire.
Cycle the burner to firing rate, and take gas pressure reading. Slowly adjust the switch until it breaks and
shuts down the burner, then reverse the adjustment so that setting is approximately 10% greater than
the reading at which the switch broke.
8.4.2 Electrical Limit Controls.
All electrical current limiting or overload devices, including fuses and thermal overload elements, should
be inspected to determine that they are properly sized and in good condition. Switches, starters, and
relays should be checked for proper operation.
9 TROUBLESHOOTING
If burner does not start, check the controller fault code in the burner manual.
1.
Check all electric fuses.
2.
Check water level in boiler.
3.
Check limit controls to make sure they are making circuit.
4.
Push motor or starter reset button.
5.
Push reset button on the programming control.
6.
Push reset on high and low gas pressure switches.
7.
Push reset button(s) on LWCO and temperature devices.
8.
If burner then fails to start, call a qualified service technician.
Summary of Contents for Triumph 1000
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Page 20: ...20 TRIAD Boiler Systems Inc West Chicago IL www triadboiler com Model 300 500 Model 750 1000 ...
Page 27: ...27 TRIAD Boiler Systems Inc West Chicago IL www triadboiler com 2 6 Example wiring diagrams ...
