Danfoss iSave 21, Руководство пользователя

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User manual iSave 21
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180R9221 / 521B1174 / DKCFN.PS.003.A1.02
The electric motor must be shut of if the maximum torque of the iSave exceeds the defined
limit. The response time of the power shutoff to the iSave must be of maximum 1 second.
If more electric motors are powered by the same soft starter or VFD, each electric motor
must be equipped with “torque limit equipment” to protect the iSave against overload.
Below are examples of equipment which can measure the load on the electric motor or limit
the torque on the iSave.
1. VFD with integrated current monitoring relays.
2. External current monitoring relays.
3. Torque limiter coupling.
See also examples of “iSave overload protection” equipment in appendix 10.5
The electric motor and iSave must always be protected against overload.
Otherwise, the torque will exceed the maximum limit and may lead to an irreparable
fracture of the iSave’s internal parts.
7.1 Safety regulations
The operator ensures that all inspection and installation work is performed by authorised,
qualified specialist personnel who are thoroughly familiar with the manual.
Before starting up the iSave and the high pressure pump, make sure that the following
requirements are met:
• The iSave has been properly connected to the electric power supply and is equipped
with all protection devices in accordance with EN60204-1.
• Check that all motor protections are properly set.
• All safety equipment, auxiliary equipment and connections required are proper con -
nected and operational.
• Check all bolts in all connections and in the foundation of the iSave and the pumps.
7.2 Support
Danfoss A/S offers commissioning and service at system manufacturer’s location. Rate
quotes are offered upon request.
7.3 Commissioning
Before starting up the iSave and the high pressure pump make sure that the following
requirements are met:
• All pipes are flushed, free from debris and full of water.
• The iSave has been bled and is full of water.
• At pressure lower than 10 bars, check the system for leakage.
Slowly raise the pressure in the system and set all pressure switches to the correct limit
and continually check all connections for leakage.
• Set pressure relief valve on both low and high pressure at the maximum system pres -
sure.
• Check high pressure hoses for proper assembly and inspect for external leakage for all
connections.
• At low pressure, start the iSave and check direction of rotation.
• Start the system according to the “Start and stop procedure” instructions in appendix. 10.1
7 Commissioning, start-up and shutdown