Eng
lish (US)
4
3.2 Delivery and handling
3.2.1 Delivery
The Hydro Multi-B booster system is delivered in packaging
specially designed for transport by fork-lift truck or a similar
vehicle.
The forks of the fork-lift truck must be at least 6 ft (2 m) long.
3.2.2 Handling
The Hydro Multi-B booster system is delivered attached to a
wood pallet. It is recommended to move the system on wood
pallet to installation location. Detach from wood pallet and slide
off wood pallet at final location of installation.
When lifting the booster system, only use suitable lifting
equipment that is in good condition and approved for the weight.
The weight is stated on the nameplate of the booster system.
3.3 Applications
Grundfos Hydro Multi-B booster systems are for constant
pressure boosting applications.
The Hydro Multi-B system is designed to maintain a constant
pressure on the discharge side of the pumps. Hydro Multi-B
systems for constant-pressure applications adjust the
performance according to the demand and keep a constant
pressure in the following ways:
•
by cutting the required number of pumps in and out
•
through continuous adjustment of the speed of the running
CME pumps.
3.3.1 Operating principle
The user enters the required pressure of the system (setpoint) via
the user interface of the CU 323 control unit. The CU 323 adjusts
the system performance according to the feedback received from
the pressure transmitter installed on the discharge manifold.
3.3.2 Control variants
Hydro Multi-B systems for constant-pressure applications are
available as control variant E. The systems works as described
below.
Warning
When lifting the booster system, never use the
eyebolts of the motors.
Do not lift the booster system by the manifolds.
Do not stand on the manifolds.
Control variant E
Two to three electronically speed-controlled CME pumps.
TM
0
3
0
9
93
0
905
One CME pump in operation.
TM
00 799
5 229
6
Three CME pumps in operation.
TM
00
79
96
22
96
•
Control variant E for constant-pressure applications
maintains a constant pressure through continuous adjustment
of the speed of the pumps.
•
The system performance is adjusted to the demand by cutting
the required number of pumps in and out and through parallel
control of the pumps in operation.
PT
Q
H
H
set
Q
H
H
set
