Wilo 2819142, Installation And Operating Instructions Manual

4

4.2 MHIE DM (Three Phase Variable Speed)
4.2.1 Operating Mode

CAT 5 DM is a variable speed booster set which is 

controlled via an integrated motor mounted drive 

and pressure transducer. Once the pressure is set 

on the drive the speed of the pump will ramp up 

and down according to the demand of the system 

(see pump manual for the setting of the system 

pressure)

NOTE – No flow cut off time can be changed in 

the drive via menu 5.2.7.0 and is factory set at 

30 seconds

4.2.2 Operating Features

•0-20mA pressure transducer monitors system 

pressure
•SBM Volt Free Contact (VFC) – Can be configured 

to switch on power up or run (see menu 4.7.6.0)
•SSM Volt Free Contact (VFC) – Switches when 

pump goes into fault conditions
•Low water cut out switch – Turns the booster off 

instantly once the water level drops below a set 

level to stop air from entering the pump

4.3 MHI EC-EM (Single Phase Variable Speed) 
4.3.1 Operating Mode

CAT 5 EC-EM is a variable speed booster set 

which is controlled via a water cooled inverter. 

The pressure is set in the drive by holding down 

the menu button (Table 1) and cycling through 

the drive settings by pressing the ‘Enter’ button 

and changing the settings with the up and down 

arrows. For full programmable settings see Table 

2. Once the pressure is set on the drive press the 

‘Automatic Mode’ button and the speed of the 

pump will ramp up and down according to the 

demand of the system. 
To run the pumps at a constant 50Hz press and 

hold the ‘Manual Mode’ button

4.3.2 Operating Features

•Low water cut out switch – Turns the booster off 

instantly once the water level drops below a set 

level to stop air from entering the pump
•Programmable electronic menu with alarm log 

and run timer (Table 2)

4.4 MHIE-EM (Single Phase Variable Speed) 
4.4.1 Operating Mode

MHIE-EM is a variable speed booster set which is 

controlled via an integrated motor mounted drive 

and pressure transducer. System pressure is set 

via the variable speed dial on the side of the motor 

(Fig8). System pressure is approximately 1 bar for 

every 10% on the dial. Set the system pressure by 

starting at 0% on the dial and slowly raising until 

required setpoint is reached.

ATTENTION! Test pressure setpoint, by isolating 

the system via isolation valve to reduce the risk 

of over pressure in the system
4.4.2 Operating Features

•Programmable electronic menu with alarm log 

and run timer (Table 2)
•Pump fail volt free contact 230V 1A (Fig4)

5 Installation

5.1 Hydraulic Connections (Fig5)

The mains water is connected directly onto the ½” 

male BSP thread equilibrium ball valve. The booster 

discharge is connected directly onto the isolation 

valve which has a 1” female BSP thread. All CAT 

5 sets must be fitted with the supplied 8 litre 

diaphragm pressure vessel onto the vessel valve 

provided next to the isolation valve. Once the tank 

is filled the pump must be properly vented before 

use.

ATTENTION! Connections must be made 

according to local water authority regulations

5.2 Electrical Connections (Fig1-4)

Please use the correct wiring diagram provided 

with the booster for connection of mains voltage. 

Pay close attention to the terminals used and that 

the correct voltage is applied. Failure to do so may 

cause damage to pump or drives and will void the 

warranty.

DANGER! The electrical connections and testing 

must be carried out by a qualified electrician and 

in accordance with locally applicable standard 

specifications.