Owner's manual

-15-
GB
5.1.1 Insulation of the pump in cooling/conditioning systems
When using the pump in cooling systems and want to insulate the hydraulic casing, it is
necessarytoimplementdiffusedisolationofthehydrauliccasing.
ATTENTION!
Thehydrauliccasingofthepumpcanbeinsulatedonlytothecleftbetweenthemotor
andthehydrauliccasing.Openingsforcondensatedrainageshouldremainuncovered
and enablethedrainage fromthestator housing.Similarly,the same openingsmust
beuncoveredalsoinheatingsystems,whenonlythermalinsulationofhydrauliccasing
isimplemented(Fig.1,2,POS. 15). Electric motor casing, onwhichtheopeningsfor
condensatedrainagearelocated,undernoconditionshoudnotbeinsulated!
Fig.1Fig.2
5.2 Electrical mains connections
GHN (basic, auto), GHND (basic, auto) pumps are provided with built-in, three
phase electric motor, to be connected with A.C. mains of 3~400 V, 50Hz.
GHNM (basic, auto), GHNMD (basic, auto) type pumps have built-in, single
phaseelectricmotor1x230V,50Hz.
The motor is internally protected with bimetal switch. The electric motor
haveabuilt-in,thermalcutout,thatwillswitchofftheelectricmotorwhenitis
overheated.
Thefuse for isolationofall poles fromthemains should beincorporatedin
accordance with the national electrical installation standards.
ThemotorprotectionswitchIskraMISMS25,SchrackALEAorsimilarswitches
areappropriatefuses.
The connecting wire has to be connected over a cable entry M20 (Fig.1 –
POS.7).