Product description
en
Installation and operating instructions Wilo-Atmos TERA-SCH
11
Wilo control devices allow
ƒ
Optimisation of the pump output for the demands of the installation
ƒ
Particularly economically efficient pump operation
4.1.1
Hydraulics
The pump consists of axially divided spiral housing (with replaceable wear rings) and
cast-on pump support feet. The impeller is a double suction closed radial impeller. The
high head hydraulic presents a double volute design to minimise the radial forces on the
shaft assembly. The pump shaft bearings are greased for life lubricated radial ball bear-
ings.
4.1.2
Motor
The system is driven by IEC standard motors in a three-phase current version.
NOTICE
Use a heat-resistant mains connecting cable in systems where fluid temperatures
exceed 90 °C!
4.1.3
Seal
The fluid pump is sealed via mechanical seals in accordance with EN 12756 or by stuff-
ing box packings.
4.2
Operation with frequency con-
verter
Operation on the frequency converter is permitted. Refer to the documentation from
the motor manufacturer for the relevant requirements and observe its contents.
4.3
Type key
Example: Wilo-Atmos TERA-SCH 250/360-75/4-L1
Atmos
Product family
TERA
Series
SCH
Construction (splitcase pump, horizontal)
250
Nominal diameter DN of pressure port
360
Nominal diameter of the impeller in mm
75
Rated motor power P
2
in kW
4
Number of poles
L1
Material configuration : Bronze impeller
4.4
Technical data
General
Date of manufacture [MFY]
See rating plate
Mains connection [U/f]
See motor rating plate
Power consumption [P
1
]
See motor rating plate
Rated power [P
2
]
See motor rating plate
Rated speed [n]
See rating plate
Max. delivery head [H]
See rating plate
Max. volume flow [Q]
See rating plate
Permissible fluid temperature [t]
-20 °C to +100 °C
Permissible ambient temperature
[t]
+40 °C
Permissible operating pressure
[P
max
]
10/16 bar (depending on type)
Flanges
PN 16 in accordance with EN 1092-2
Permissible fluids
– Heating water in accordance with VDI 2035
– Cooling/cold water
– Water-glycol mixture up to 40 % vol.
– Raw water
Protection class
IP55
