Thermal Solutions EVO-500 Installation, Operating And Service Instructions page 22

4. Use thread joint compound resistant to the action of
liquefied petroleum gas.
WARNING
Failure to use proper thread compounds on all
gas connectors may result in leaks of flammable
gas.
5. All above ground gas piping upstream from field
supplied manual gas valve must be electrically
continuous and bonded to a grounding electrode.
Do not use gas piping as grounding electrode. Refer
to National Electrical Code, ANSI/NFPA 70 and /or
CSA C22.1 Electrical Codes.
WARNING
Gas supply to boiler and system must be
absolutely shut off prior to installing or servicing
boiler gas piping.
WARNING
Use an additional gas pressure regulator where
the gas pressure is greater than 5 psig. Using
one additional regulator for multiple boilers
may result in unsafe boiler operation. The
additional regulator must be able to properly
regulate gas pressure flow at the lowest input
of a single boiler. If the regulator cannot do this,
two or more additional regulators are required.
Consult regulator manufacturer's instructions for
minimum gas flow rate.
6. Pressure test. The boiler and its gas connection
must be leak tested before placing boiler in
operation.
a. Protect boiler gas control valve. For all testing
over ½ psig, boiler and its individual shutoff
valve must be disconnected from gas supply
piping. For testing at ½ psig or less, isolate
TABLE 3 - BOILER GAS TRAIN INLET PRESSURE
Boiler Model
EVO-1000*
EVO-1500*
EVO-2000*
* Available with optional gas train with min 4" w.c. inlet gas pressure.
EVO-500
EVO-750*
boiler from gas supply piping by closing the
boiler's individual manual shutoff valve.
b. Locate leaks using approved combustible
gas detector, soap and water, or similar
nonflammable solution.
Do not use matches, candles, open flames or
other ignition source to check for leaks.
MIN. ("w.c.)
5.0
7.0
7.0
7.0
9.0
22
DANGER
MAX.
5 psi-NG
2 psi-LP