Zehnder Pumpen ZFS 71 Ex, Руководство по эксплуатации

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Materials:
Motor housing ............... GG 20 Motor shaft.......................1.4021
Pump housing ............... GG 20 Bearing flange ................... GG 20
Cutting flange…............1.4112 Impeller .............................. GG 20
Cutting knife…..............1.4112 Other seals ........................ NBR, FPM
Auxiliary bearing flange St 37-2 Floating-ring type shaft seal..........SiC (silicon carbide)
1.4 Range of application
The submersible waste water pumps of the type series ZFS 71 II 2G EEx d IIB T3 are used for the drainage of
sewage and wastewater shafts, excrement collection pits, sewage plants and the like in explosion-prone areas.
In this context, the following has to be pointed out (Excerpt from DIN VDE 0165):
For the installation of electrical systems in explosion-prone areas, the “directive about electrical installations in ex-
plosion-prone areas” (ElexV) applies. Amongst other things, this directive regulates the question of permitting ex-
plosion-protected electrical equipment and the responsibility (admission) of experts. (DIN VDE 0165 1.2)
When assessing the risk of explosion, that means when explosion-prone areas are defined, the „directives for the
avoidance of dangers caused by a potentially explosive atmosphere with collection of examples – guideline on pro-
tection against explosion – (EX-RL)“ are to be taken into account. If it is a matter of special cases, or if there are
doubts about the definition of explosion-prone areas, the supervisory authority has to decide. (DIN VDE 0165
1.1.2)
In case of medical areas, the DIN VDE 0107 (DIN VDE 0165 1.2) applies.
In case of the installation of electrical systems in areas which are endangered by explosive materials, the DIN VDE
0166 (DIN VDE 0165 1.3) applies.
In case of the operation of electrical systems in explosion-prone areas, the DIN VDE 0105 part 9 (DIN VDE 0165
1.4) applies.
This regulation does not apply for the installation of electrical systems in mine openings which can be endangered
by mine gas. Here, the norms of the set DIN VDE 0118 „Installation of electrical systems in underground mining
companies” (DIN VDE 0165 1.5) apply.
Terms:
„Explosion-prone areas“ are areas in which an explosive atmosphere can occur in endangering quantities (danger-
ous explosive atmosphere) due to the local and operational circumstances (explosion hazard) (DIN VDE 0165
2.1).
„Explosive atmosphere“ is a conglomerate of inflammable gases, vapours, mists or dusts including the common
additives (e.g. humidity) under atmospheric conditions, inside which a reaction independently reproduces itself af-
ter ignition. Atmospheric conditions are total pressures of 0.8 to 1.1 bar and conglomerate temperatures of -20 to
+60°C. (DIN VDE 0165 2.2)
1.5 Accessories
All pumps of the type series ZFS 71 are delivered with 10 m of cable and free
cable end. Switching devices for
pumps with explosion protection are available as standard or special models with various level control systems.
For the installation of the pump, a supporting ring (primarily for transportable operation) or a coupling device
(stationary operation) is available.
2. Safety:
( from: “VDMA-norm 24 292“)
The operation manual at hand provides basic notes which have to be taken into account during assembly, operation
and maintenance works. Therefore, before assembly and commissioning, this operation manual has to be read by
the assembler as well as the responsible personnel/operator at all costs. It always has to be available on site of
operation of the machine/plant.
The general safety notes listed under the main point safety are not the only notes to be taken into account. Please
also observe the specific safety instructions, such as those for private use, listed under other main points.