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Siemens Building Technologies Basic Documentation LMV51... CC1P7550en
HVAC Products 3 Fuel train applications (examples) 01.10.2003
LMV start release - oil input
V2
V3
No
2)
Ph
Ï‘
Ï‘
7550s09E/0202
HE
HO
Program
V1
1)
2-stage burner
LMV start release - oil input
V2
1)
V1
LMV direct heavy oil start input
Pmax
2)
M
Ph
Ï‘
Ï‘
7550s12E/0202
Program
HO
Ï‘
Ph
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)
Direct ignition with heavy
oil, multistage
Direct ignition with
heavy oil, modulating
Fuel valve
control program
**)