Siemens LMV51 Series Basic Documentation page 17

Siemens Building Technologies
HVAC Products
1.4 Electrical connection of ionization probe and
flame detector
It is important to achieve practically disturbance- and loss-free signal transmission:
•
Never run the detector cables together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
•
Observe the permissible cable lengths
•
The ionization probe is not protected against electrical shock hazard. The mains-
powered ionization probe must be protected against accidental contact
1.5 Commissioning notes
•
Prior to commissioning, check to ensure that wiring is in an orderly state and that
the parameter are correctly set
•
When commissioning the unit, check all safety functions
•
There is no absolute protection against incorrect use of the RAST5 connectors. For
this reason, prior to commissioning the plant, check the correct assignment of all
connectors
•
Electromagnetic emissions must be checked on an application-specific basis
1.6 Setting and parameter setting notes
•
When adjusting the electronic fuel / air ratio control system integrated in the
LMV5..., allow for sufficient amounts of excess air since – over a period of time –
the flue gas settings will be affected by a number of factors (e.g. density of air,
wear of actuating devices, etc.). For this reason, the flue gas values initially set
must be checked at regular intervals
•
To provide protection against inadvertent or unauthorized parameter transmission
between the parameter backup memory of the AZL5... display and operating unit and
the LMV5... basic unit, the OEM (burner or boiler manufacturer) must enter an indi-
vidual burner identification (ID) for each burner. Compliance with this regulation is
mandatory to ensure that the LMV5... system will prevent parameter sets from other
plant (with unsuited and possibly dangerous parameter values) to be transmitted to
the LMV5... basic unit via the backup memory of the AZL5... (also refer to the de-
scription of burner identification in chapter 7 Display and operating unit AZL5...)
•
With the LMV5..., it is to be noted that the unit's characteristics are determined pri-
marily by the specific parameter settings rather than by the type of unit. This means
that, among other things, each time a plant is commissioned, the parameter set-
tings must be checked and the LMV5... must not be transferred from one plant to
another without adapting the parameter settings to the new plant
•
In the case of dual-fuel burners and oil-firing, the short preignition (Phase 38) pa-
rameter OnTmeOilIgnition is to be selected and a magnetic clutch is to be used,
ensuring that there will be no oil pressure until this phase is reached. Then, the
long preignition (from Phase 22) must be parameterized
•
When using the ACS450 PC software, the safety notes given in the relevant Oper-
ating Instructions (CC1J7550) must also be observed
•
A password protects the parameter setting level against unauthorized access. The
OEM allocates individual passwords to the setting levels he can access. The stan-
dard passwords used by Siemens BT must be changed by the OEM. These pass-
words are confidential and may only be passed on to persons authorized to access
such setting levels
•
The responsibility for setting the parameters lies with the person who – in accor-
dance with his access rights – has made changes to the respective setting level
In particular, the OEM will assume responsibility for the correct parameter set-
tings in compliance with the standards covering the specific applications (e.g.
EN 676, EN 267, EN 1643, etc.).
Basic Documentation LMV5...
1 Safety notes
17/301
CC1P7550en
13.08.2004