Monitoring Devices; Operating Modes; Operation With Frequency Converter; Operation In An Explosive Atmosphere - Wilo Rexa FIT V05-Serie Einbau- Und Betriebsanleitung

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4.2

Monitoring devices

Monitoring of motor winding
The thermal motor monitoring protects the motor wind-
ing from overheating. Temperature limiter with bimetal-
lic strip is fitted as standard.
Thermal motor monitoring is self-switching for single-
phase current motors, i.e. if the motor is switched off
due to overheating and then cools down, it is automati-
cally switched on again.
For three-phase current motors, the thermal motor
monitoring must be connected in the switchgear or plug.
External monitoring of the sealing chamber
The sealing chamber can be equipped with an external
pencil electrode. The electrode registers fluid ingress
through the mechanical seal on the fluid side. An alarm
or deactivation of the pump can therefore take place by
pump control.
4.3

Operating modes

Operating mode S1: Continuous duty
The pump can operate continuously at the rated load
without exceeding the permissible temperature.
Operating mode S2: Short-time duty
The maximum operating period is specified in minutes,
e.g. S2-15. The pause must last until the machine tem-
perature no longer differs from the temperature of the
coolant by more than 2 K.
Operating mode S3: Intermittent periodic duty
This operating mode defines a switching cycle in a com-
bination of periods of operation and standstill. Specified
value (e.g. S3 25 %) relates to the operating time. The
switching cycle has a duration of 10 min.
If two values (e.g. S3 25 %/120 s) are specified, the first
value relates to the operating time. The second value
specifies the max. period of the switching cycle.
4.4

Operation with frequency converter

Operation on the frequency converter is not permitted.
4.5

Operation in an explosive atmosphere

Operation in an explosive atmosphere is not permitted.
4.6

Technical data

General
Date of manufacture See rating plate
[MFY]
Mains connection [U/f] See rating plate
Power consumption [P ] See rating plate
1
38
Product description
Rated power [P ] See rating plate
2
Max. delivery head [H] See rating plate
Max. volume flow [Q] See rating plate
Activation type [AT] See rating plate
Fluid temperature [t] 3...40 °C
Protection class IP68
Insulation class [Cl.] F
Speed [n] See rating plate
Max. switching fre- 30/h
quency
Max. immersion depth See rating plate
[8]
Cable length (standard 10 m
version)
Explosion protection -
Operating modes
Immersed [OTs] S1
Non-immersed [OTe] S2-15, S3 10%*
Pressure connection
FIT V05... DN 50, PN 10
FIT V06... DN 65/80, PN 10
FIT V08... DN 80/100, PN 10
FIT V10... DN 100, PN 10
Suction port
FIT V05... DN 50, PN 10
FIT V06... DN 65, PN 10
FIT V08... DN 80, PN 10
FIT V10... DN 100, PN 10
* Operating mode S3 25 % is permitted if the necessary
motor cooling is guaranteed before the motor is
switched on again! To ensure the required cooling, the
motor must be completely immersed for at least 1 min.
Statement of date of manufacture
The date of manufacture is stated in accordance with
ISO 8601: JJJJWww
▪ JJJJ = year
▪ W = abbreviation for week
▪ ww = calendar week
4.7

Type key

Example: Wilo-Rexa FIT V06DA-110/EAD1-2-T0015-540-P
FIT Series
V Impeller = vortex impeller
WILO SE 2019-02