Service manual
AOS WPC - Technical Literature Dept 3 of 72 Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent
VF BOILER SERVICE MANUAL
Tools Required
• Instruction Manual that came with the boiler.
• Hand tools common to installation and service of commercial water heaters and boilers.
• TORX® T40 or 5mm hex wrench - for setting gas mixture at gas valve.
• 3mm or 7/64in hex (allen) wrench - for setting gas mixture at gas valve.
• One - U tube manometer for measuring supply gas pressure.
• One (optionally two) digital Manometers range -15.00 to +15.00" W.C., resolution 0.01"
W.C. Recommend UEI model EM200, TPI model 620 or equivalent. Used to measure
manifold gas pressures and to test performance of air pressure switches. Optional second
digital manometer can be used in place of U tube manometer for measuring supply gas
pressure.
• True RMS Digital Multi Meter DMM, recommend UEI model DL289 or Fluke equivalent.
Capable of measuring:
AC/DC Voltage
VAC Frequency (Hz)
Ohms
DC micro amps µA
• AC amp meter- recommend UEI model DL289 or equivalent.
• Combustion analyzer
Capable of measuring:
CO2
CO
Draft Pressure
Exhaust Temperature
Efficiency