PATH freewatt HDJ, Инструкция по установке, эксплуатации и обслуживанию, Страница: 33 / 68

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11.1 Check Gas Supply
Gas pipe to boiler must be correct size for length of run •
and for total BTU per hour input of all gas utilization
equipment connected to piping. See Tables in boiler
and HONDA MCHP installation manuals for proper
size. Verify gas line complies with authority having
jurisdiction.
freewatt PLUS
• Boiler and MCHP units’ individual
shutoff valves must be disconnected from gas supply
piping system during any pressure testing of system at
test pressures in excess of ½ psig (3.5 kPa).
freewatt PLUS
• Boiler and MCHP unit system must
be isolated from gas supply piping system by closing
respective individual manual shutoff valves during any
pressure testing of gas supply piping system at test
pressures less than or equal to ½ psig (3.5 kPa).
Recommend line pressure be within minimum and
•
maximum values in Table 11-1 for proper operation of
system.
Table 11-1 Gas Supply Pressures
Gas tyoe
Minimum
(in. w.c.)
Nominal
(in. w.c.)
Maximum
(in. w.c.)
Natural 4” 7” 10”
Propane 10” 12” 14”
Consult boiler and HONDA MCHP installation procedures for
leak testing and purging gas lines.
11.2 Gas Piping
Consult boiler and HONDA MCHP installation procedures for
specifi c instructions regarding gas piping.
11 - GAS SUPPLY PIPING
CAUTION
Units cannot operate properly or safely using fuels
outside normal commercial standards. Connect
boiler and HONDA MCHP units only to gas supplied
by commercial utility or supplier. Private gas
wells do not generally provide gas with consistent,
uniform and predictable heating values and
densities. Many non-commercial wells contain
impurities such as sulphur, which may damage
furnace or HONDA MCHP.