1. Hydro Multi-B – (2) or (3) CME Pumps in Parallel
Common suction supply ( manifold )
Common discharge ( manifold )
The pumps are the same model
Flow & head are the same for each pump
Total head is the same as the head of the individual pumps
Total flow is the sum of the flows of the individual pumps

2. Hydro Multi-B Overview
Simple to use variable speed pumping system – (2) or (3) pumps
30% - 40% Less cost than comparably sized BoosterpaQ
Flows to 330 GPM
Heads to 231 FT ( 100 PSI boost )
232 PSI Maximum working pressure
Liquid temperatures up to 140 Degrees-F
Ambient temperatures up to 104 Degrees-F
CME3 – CME15 Pumps ( “I” version )
1.5 – 7.5 HP
AQQE seal
1½ “- 3” NPT or 4” ANSI flange manifold connections
UL Listed
NSF61 Approval

3. Hydro Multi-B Systems are Very Compact

4. CME Pumps on Hydro Multi-B Systems
CME “I” version – All 304 SS wetted components
Permanent magnet motors on some pumps
1 X 230V – Through 2 HP
3 X 460V – Through 3 HP
Asynchronous motors on some pumps
3 X – 2 HP, 3 HP, 5 HP & 7.5 HP
3 X 460V – 5 HP & 7.5 HP

5. Components of Hydro Multi-B Systems
Control Panel
Diaphragm Tank
Sold Separately
Discharge Manifold
316 SS
Discharge Pressure
Transducer
CME Pumps
304 SS
Suction Manifold
316 SS
Check Valve
(1) Per Pump
Pump Isolation Valves
(2) Per Pump
Base Pressure Switch – Suction Manifold

6. Grundfos CU323 Controller Controls the Hydro Multi-B
Developed & manufactured by Grundfos
Automatically insures the best operation in all situations
Number of pumps in operation
Energy optimized pump cascade control
No need for “system expert” to operate the system
Very low potential for improper use

7. Grundfos CU323 Controller Interface
Pump Status
Pump Controled by CU323
Pump is Off
System
On / Off Button
Increase Setpoint
Pump
On / Off Button
Setpoint & Other Information
Pump Number
Decrease Setpoint
Status of
Suction Pressure
Status of Discharge Pressure or Level
Alarm Reset
Actual Discharge Value,
Value Status & Status of Sensor
Power & System Status
Alarm & Warning Status

8. Hydro Multi-B Control Panel
Manufactured by Grundfos
Panel is NEMA 3R rated
Panel is UL listed
CU323
Emergency / Normal switch
One per pump
Normal setting – Controlled by CU323
Emergency Setting – Pump runs at full speed
CU323 is deactivated
Mains power disconnect

9. Hydro Multi-B Input / Output & Communication Capabilities
Grundfos PC Tools E-Products
(2) Analog inputs
(2) Digital inputs
(3) PTC sensors
or thermal switches
(2) Digital outputs
(2) Signal relays
BACnet
LON
Modbus
GSM
GENIbus
Grundfos CIM card

10. Hydro Multi-B Pump Cascade Control Constant Pressure Application
Insures that only the required number of pumps are running
Maintain setpoint pressure
Meet the flow demand
1st Pump starts when the actual discharge pressure drops below setpoint
Another pump starts if the other pump(s) can’t maintain the setpoint
When the flow demand drops, the pump(s) stop if not needed to meet demand

11. Hydro Multi-B Automatic Pump Changeover
Insures an equal number of running hours on each pump
Insures that another pump will start to meet an increased demand
Another pump must be available
There are (3) types of automatic pump changeovers
Operation-dependent pump change
Pump with lowest number of operating hours will start 1st
Pump with highest number of operating hours will stop 1st
Alarm-dependent pump change
Will stop a pump that faults, and start another pump
Pump with lowest number of operating hours will start
Time-dependent pump change
Comes into play if a pump or pumps are running continuously
Once every (24) hours, will check if another pump, with lower operating
hours, is available, and if so, will stop the pump and start the pump with
lower operating hours

12. Hydro Multi-B Standby Pumps Constant Pressure Application
Must use Grundfos PC Tools Industrial E-Products to set this function
(1) or (2) Pumps can be selected as standby pumps
A standby pump will not operate unless another pump faults
A standby pump is not a specific pump
Status as a standby pump alternates between all pumps

13. Hydro Multi-B Stop Function / Low Flow Operation Constant Pressure Application
The last pump in operation can be automatically stopped due to low / no flow demand
The CU323 continually monitors flow to determine a low flow demand
Low flow = flow < minimum flow
If low flow is detected, the system will go into start / stop operation
The system will cycle on / off with a low flow demand
The system will stop if the the actual discharge pressure is above the setpoint
The system will start if the actual discharge pressure is below the setpoint
If the low demand increases above minimum flow, the system will revert to normal constant
pressure operation

14. Hydro Multi-B Dry Run Protection
A pressure switch is supplied as standard
A float switch can be used
A level switch can be used
External electrode relay
Such as a Grundfos LiqTec
Analog sensor
Minimum pressure is preset at the factory
Minimum pressure can be changes using PC Tools Industrial E-Products

15. Hydro Multi-B Other Protection Functions
Maximum discharge pressure exceeded
Stops the system if discharge pressure is > 22 PSI above setpoint for (5) seconds
Indications are shown on the CU323
Automatically restarts the system if the discharge pressure falls below the setpoint
Minimum time between start / stop of pumps
Insures a delay between the start / stop of one pump and the start / stop of another pump
Prevents “hunting” when pumps start / stop continuously
Redundant discharge pressure sensor – Requires PC Tools Industrial E-Products
Motor protection
MLE motors have motor protection built in to them
Controller lock function
Press “Reset” & “Increase setpoint” or “Decrease setpoint” for (2) seconds to lock
Press “Reset” & “Increase setpoint” or “Decrease setpoint” for (2) seconds to unlock
H.L: 95 % of Tank height
H.L: 1,5 bar above SP
Minimum time between start stop 10 sek default
WS: 5 seconds delay!
Key