Brochure

Constant Pressure Booster
CMBE Booster
2
8
2. Constant Pressure Booster
Fig. 4 CMBE Booster
The compact Grundfos CMBE Booster is suitable for
water supply in domestic applications. Thanks to the
integrated speed controller, the booster keeps a
constant pressure in the pipe system. A pressure
sensor monitoring changes in the water consumption
will signal to the speed controller to change the motor
speed to adapt the performance to the new situation.
The optional inlet pressure switch prevents the pump
from operating in case of low inlet pressure.
The CMBE Booster consists of these components:
• CME pump with integrated frequency converter
• 5-way fitting with non-return valve
• diaphragm tank
• pressure gauge
• pressure sensor
CMBE Booster Applications
The CMBE Booster is mainly used for domestic and
light commercial water supply or pressure boosting.
● Recommended
❍ Applicable.
Motor
No external motor protection is required. The MLE
motor incorporates thermal protection against slow
overloading and blocking (TP 211 according to IEC
34.11).
Features
• constant pressure via integrated speed control
•compact
• robust, stainless steel design
• easy installation
• low energy consumption
• dry-running protection
• noise level below 55 dBA and even lower at
controlled speed
Operating conditions
Electrical data
TM05 7512 3713
Application CMBE 1 CMBE 3 CMBE 5 CMBE 10
Single-family houses ●●
❍❍
Two-family houses
❍
●● ●
Cluster homes ●● ●
Blocks of flats ●● ●
Schools ●● ●
Small hotels/guest houses ●● ●
Small office buildings ●● ●
Agriculture
❍
●●
Irrigation
❍
●●
System pressure Max. 145 psi
Suction lift
Max. 23 ft. including suction-pipe
pressure loss at a liquid
temperature of 68 °F (+20 °C).
Liquid temperature 32 °F to 140 °F (0 °C to +60 °C).
Ambient temperature
Max. 113 °F (+45 °C) for 115V
Max. 122 °F (+50 °C) for 220V
Min. -4 °F (-20 °C).
Relative air humidity Max. 95 %.
Enclosure class IP55.
Insulation class F.
Sound pressure level
The sound pressure level of the
pump is below 55 dB(A).
Supply voltage 1 x 200-240 V, 1 x 115 V, 60 Hz
Start/stop frequency Max. 100 per hour.
Cut-in pressure 7 psi below setpoint.
Pump type
Voltage
[V]
I
max
[A]
P1
[W]
Motor
(Hp)
Nominal
CMBE 1-44 1 x 115 8 1100 1
1 x 200-240 3.4 - 2.9 685 1.5
CMBE 1-75 1 x 115 8 1100 1
1 x 200-240 6.55 - 5.45 969 1.5
CMBE 1-99 1 x 200-240 6.55 - 5.45 1050 1.5
CMBE 3-30 1 x 115 8 1100 1
1 x 200-240 6.55 - 5.45 815 1.5
CMBE 3-51 1 x 115 8 1100 1
CMBE 3-62 1 x 200-240 6.55 - 5.45 1220 1.5
CMBE 3-93 1 x 200-240 8.9 - 7.45 1300 2
CMBE 5-31 1 x 200-240 6.55 - 5.45 1300 1.5
CMBE 5-62 1 x 200-240 8.9 - 7.45 1400 2
CMBE 10-54 1 x 200-240 9.1 - 7.6 1250 2