© 2021 Carrier
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3. MOUNTING TUBES
For fixing the pilot burner to a burner plate there are two types of mounting tubes available (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.
FIGURE 3.
Gas pilot type SP-32-NG/PG-FD with examples of electrical ignition devices
4. IGNITION SOURCES FOR GAS PILOT LIGHT-OFF (SETTING METHOD)
Sources of ignition in the gas pilot
SP-32-FD
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 all conditions. The
secondary circuit voltage is nominally 2000 VDC at primary supply 230 or 110 VAC,
