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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 3 Fuel train applications (examples) 13.08.2004
HO
IV1V2V3
ts 1
ts 2
Operation
Air damper
position
V3 (= stage 2)
Multistage operation
7550f01cE/0200
MIN
MAX
Heavy oil
(direct trafo ignition)
Phase 38
max. 45 s
**)
Modulating burner
Circulation from Phase 38, max. 45 s
as soon as direct heavy oil start
= ON in Phase 38:
→ Phase change in Phase 40
Direct heavy oil start = OFF
at the end of Phase 38
→ Repetition (max. 3 times in total)
Gas trains G, Gp1 and Gp2
1)
can be randomly combined with oil trains LO and HO for
operation with dual-fuel burners since these fuel trains operate independently.
Oil trains LOgp and HOgp are designed for ignition with a gas pilot. They
must always be combined with a special gas train Gp2 for operation with a
dual-fuel burner.
1) With Gp2 permitted with
HW 01.C0 and SW V01.40 or higher
Fuel valve
control program
Note on dual-fuel burners
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