Mechanical Seal; Disassembling And Dismantling The Pump; 9.2.1 Dismantling - Wilo -VeroLine-IPH-O Einbau- Und Betriebsanleitung

9.1

Mechanical seal

9.2 Disassembling and dismantling
the pump

9.2.1 Dismantling

Installation and operating instructions Wilo-VeroLine-IPH-O, IPH-W
DANGER! Risk of fatal injury!
Failure to install safety devices on the motor, terminal box or on
the coupling can cause electrical shock or contact with rotating
parts, potentially resulting in life-threatening injuries.
• Before commissioning and after maintenance work, all safety
devices (such as terminal box covers or coupling covers) that were
removed must be reinstalled.
• Keep a safe distance during commissioning.
• Always wear protective clothing, protective gloves and protective
goggles when working.
WARNING! Risk of injury due to the weight of the pump!
The pump itself and pump parts can be extremely heavy. Falling
parts pose a risk of cuts, crush injuries, bruises or impacts, which
may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing.
• When performing installation and maintenance work, protect the
pump components against falling.
• Never stand underneath a suspended load.
DANGER! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
The mechanical seal is maintenance-free. There may be a slight
amount of drip leakage during the running-in period. Once in a while,
however, a visual inspection is required. If there is clearly detectable
leakage, the seal is to be changed. Wilo offers a repair kit which con-
tains the necessary parts for replacement.
See fig. 1 for disassembling/dismantling the pump:
• Disconnect the system from the power and secure it against being
switched on.
• Close the check valves in front of and behind the pump.
• Drain the pump.
WARNING! Danger due to extremely hot or extremely cold pressur-
ised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the venting screw is opened completely, extremely hot
or extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
• Take extra care when draining the unit.
• Loosen the screws (437a) on the flange between the pump and the
lantern (5b) and remove the motor, together with the impeller and
lantern, from the pump housing. The pump housing (201f) remains in
its installed position.
• Store the housing seal (411a) in a safe place.
• Loosen the impeller nut (49a) and remove the impeller disc (319k),
impeller (207a) and key (487b).
• Remove the housing cover (71c), circlip (481a) and radial bearing
(59a).
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