UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual page 76

• METRIC GAS METERS
Natural Gas
127,116 x
MBH =
Seconds
For exam ple: Gas Met er m easures 0.1 cubic Met ers in
100 seconds
127,116 x 0.1
MBH =
100
Propane Gas (LP)
383,482 x
MBH =
Seconds
• NATIONAL BOARD OF BOILER AND PRESSURE
VESSEL INSPECTORS - Group com posed of boiler
and pressure vessel inspect ors represent ing st at es,
cit ies and provinces enforcing pressure equipm ent
laws and regulat ions.
• PRESSURE TEST - Operat ion perform ed t o verify gas
t ight int egrit y of gas piping following it s inst allat ion or
modification.
• PURGE - To free gas conduit of air or gas, or m ixt ure
of gas and air.
• PURGE TIME - Period of t im e int ended t o allow for
dissipat ion of any unburned gas or residual product s
of com bust ion.
• QUALIFIED AGENCY - Any individual, firm,
corporat ion, or com pany engaged in and responsible
for:
• I nst allat ion, t est ing, or replacem ent of gas piping,
o r co n n ect i o n , i n st al l at i o n , t est i n g , r ep ai r o r
ser v i cing of appliances and equipm ent .
• Experienced in such work.
• Fam iliar wit h all precaut ions required.
• Com plies wit h all requirem ent s of aut horit y
having j urisdict ion.
• SAFETY RELIEF VALVE - Valv e designed t o relieve
pressure in hot wat er supply syst em when pressure
exceeds pressure capabilit y of equipm ent .
• SAFETY SHUTOFF DEVICE - Device t hat will shut
off gas supply to controlled burner in event source of
ignit ion fails.
• SEDIMENT TRAP - Gas piping arrangem ent designed
t o collect any liquid or solid cont am inant before
reaching gas valve.
• SERVICE - Supply, inst allat ion, or m aint enance of
goods carried out by a Qualified Installer / Service
Technician.
cu m eters
= 127 MBH
cu m eters
1 4 - GLOSSARY
• TWO PIPE SYSTEM - Type of vent ing t hat allows
for exhaust flue and intake air piping to be separated
from each ot her. Fresh air m ay be drawn in at a
different area from where flue terminal is located.
• VENT - Passageway used to convey flue gases from
appliance vent connect or t o out doors.
• VENTING SYSTEM - Cont inuous open passageway
from of appliance vent connect or t o out doors for
purpose of removing flue or vent gases.
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240013503 REV A, [ 03/ 15/ 2022]