Current through Register 1531, September 27, 2024
(1) For gas
equipment with an input of one million BTU's or more per combustion chamber, an
authorized representative of the equipment or burner manufacturer shall perform
the initial start-up, final adjusting and testing of the burner and controls in
the presence of the gas inspector. Additionally, the serving gas supplier must
be notified at least 48 hours in advance of the initial startup to be given the
opportunity to attend the startup.
(2)
Purging of Gas
Equipment. The furnace, passes, and connected flue piping shall be
thoroughly purged before lighting of pilots or burners. This shall be done by
creating air flow through the setting by fully opening flue dampers and air
shutters and by operation of induced and forced draft fans, if
present.
(3)
Control
Operating Tests.
(a) All
controls shall be thoroughly checked for proper operation and sequencing before
the burner is put into operation. Manufacturer's instructions shall be
followed.
(b) All safety shutoff
gas valves shall be tested for gas tightness while in the closed position
before being placed in service. During this test, gas shall be shut off to all
burners downstream from the safety shutoff gas valve.
(4)
Pilot Operation
Tests.
(a) After the gas piping
has been thoroughly cleared of air and any foreign materials, the pilot burner
shall be lighted and adjusted with the main burner manual and automatic valves
in the closed position. Adjustment to the pilot shall be made in accordance
with manufacturer's instructions.
(b) Pilots shall not deposit carbon when
adjusted according to the manufacturer's instructions.
(c) When escapement or bleed pilots are used,
the discharge shall be in a fixed position and shall be freely ignited by the
continuous burning pilot or vented to a safe location.
(5)
Burner Operation
Tests.
(a) The main burner shall
be put into operation and tested only after 248 CMR 7.04(2) through (4) have
been completed. Manufacturer's instructions shall be followed for light-off and
adjustment of the main burner.
(b)
Pilots shall reliably effect immediate ignition of the main burner even when
the gas supply to the pilot(s) is reduced to a point where the pilot flame is
just sufficient to actuate or energize the flame detection device. Follow the
manufacturer's instructions in conducting this test.
(c) Continuously burning pilot flames shall
not become extinguished: when the main burners are turned on or off in a normal
manner, either manually or by automatic controls, when the air flow through the
burner is rapidly changed from maximum to minimum or vice versa after the main
burners are shut off following operation of the equipment at its maximum
capacity, nor during any normal operating conditions that will occur. The above
tests shall be repeated three times.
(d) The pilot burner shall reliably ignite
the main burner under any normal condition of operation.
(e) The arrangement of burners, valves, and
pilots shall be such that when only the pilots supervised by the flame
safeguard equipment are in operation, any burner or combination of burners
shall be effectively ignited without delayed ignition or flash back.
(f) Burner flames shall not flash back when
fired at any rate within the installed operating range of the burner.
(g) Burner flames shall not flash outside the
equipment when the gas is turned on or off by the automatic control
mechanism.
(h) Proper air-gas ratio
shall be maintained and combustion shall be complete over the full installed
operating range of the burner.
(6)
Test for
Venting. A check shall be made for proper venting with the burner
operating at maximum installed input and with all building exhaust fans
operating which are in communication with the room containing the equipment and
with all outside closeable boiler room openings shut.
(7)
Instructions to the
Operator.
(a) Complete written
or printed instructions including wiring diagrams shall be supplied and made
conveniently available or posted in a permanent form in a prominent place near
the equipment. These instructions shall include complete start up as well as
normal and emergency shutdown procedures. Start up shall be from the methods
provided by the control system for that purpose.
(b) To guard against malfunctioning all
controls should periodically be tested on a scheduled basis.
(c)
Extended
Shutdown. When equipment is shut down for an extended period it is
recommended that in addition to closing all gas valves, as a further
precaution, gas be prevented from leaking into the equipment by blocking off or
disconnecting and capping or plugging the gas supply pipe.
