© 2020 Carrier
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3. MOUNTING TUBES
For fixing the pilot burner to a burner plate there are two types of mounting tube (material: carbon steel), offered as
an optional accessory and to be ordered separately (see Fig. 2):
- a flange mounting tube allowing the fixing of a gas pilot without the use of welding, to be fixed with bolts to the
burner plate. After inserting the pilot into the mounting tube its position is determined and secured with a
clamping ring located at the end of the tube assembly. This ring also provides the necessary sealing for the
connection.
- a mounting tube for welding, has a free tube section left to be welded to the burner plate. Pilot fixing inside the
mounting tube as in p. 7.1. There are two lengths A available: 150 and 600 mm.
4. IGNITION SOURCES FOR GAS IGNITER LIGHT-OFF (SETTING METHOD)
Sources of ignition in the gas pilot
SP-48-ND
are electrical high energy spark igniters (HESI) or high tension igniters
(HTI) equipped with the ignition rods of outer diameter up to 16 mm and coaxial electrode arrangement (see Fig. 3):
- for the high energy spark igniter (HESI): this type of device creates single sparks of a high energy of 12J. With
frequency of 4 to 5 sparks per second it ensures reliable ignition of a gas/air mixture under dirty and moist
conditions. The secondary circuit voltage is nominally 2 000 VDC at primary supply 230 or 110 VAC,
-
for the high tension igniter (HTI): this type of device creates an electrical arc of low energy which allows for
ignition of a gas/air mixture in clean environment and repeatable conditions. The secondary circuit voltage is 8
000 VAC at primary supply 230VAC or 110 VAC.
FIGURE 3.
Gas pilot type SP-48-NG/PG-ND with examples of electrical ignition devices
