Pressure Switch-Max-Oil (Psmax-Oil) X5-02; Start Release-Oil (Start) X6-01; Direct Heavy Oil Start (Ho-Start) X6-01; Fan Contactor Contact (Fcc) Or Fgr-Ps X4-01 - Siemens LMV51 Series Basic Documentation

Pressure switch-max-
Oil (PSmax-Oil)
X5–02
Start release-oil
(START)
X6–01
Direct heavy oil start
(HO-START)
X6–01
Fan contactor contact
(FCC) or FGR-PS
X4–01
Siemens Building Technologies
HVAC Products
The input is used for connecting an oil pressure switch-max. It is active only when firing
on oil.
The maximum oil pressure may not be exceeded. If exceeded, at least one safety shut-
down will occur.
The input can be deactivated.
Parameter:
OilPressureMax (activated / deactivated)
There is a delayed reaction to loss of oil pressure during «TSA1» and «TSA2» to pre-
vent shutdown caused by pressure shocks when the valves open.
Parameter:
PressReacTme
The input is used for connecting a start signal, e.g. from the release contact of an ex-
ternal outside air damper. It is only active when firing on oil.
The signal is anticipated in Phase 21. If the signal is not delivered, or if it is lost, shut-
down will occur.
The input can be deactivated.
Parameter:
StartReleaseOil (activated / deactivated)
The input is used for connecting a heavy oil direct start signal with which circulation
Phase 38 with HO or Phase 44 with HOgp can be shortened.
In the circulation phase, the waiting time for the signal is a maximum of 45 seconds. If
the signal is not delivered, a home run will take place, followed by → repetition. The in-
put is only active when firing on heavy oil (HO or HOgp).
The input can be deactivated.
Parameter:
HeavyOilDirStart (activated / deactivated)
2)
(activated / deactivated)
The input is used for connecting a fan contactor contact (FCC) or a flue gas recircula-
tion pressure switch (FGR-PS).
a) Parameter:
Config_FGR-PS/FCC (FCC)
The input is active when firing on oil and gas. It serves for checking the position of the
fan contactor.
A signal is anticipated at this input after the fan has received a control command.
b) Parameter:
Config_FGR-PS/FCC (FGR-PS)
The input has been designed for the connection of an air pressure switch for flue gas
recirculation (only from LMV52...).
c) Parameter:
Config_FGR-PS/FCC (deactivated)
The function of the input can be deactivated.
Basic Documentation LMV5...
4 Burner control
Active inputs are checked for signal inputs.
41/301
CC1P7550en
13.08.2004