3-1
3. Configuration and overview of the water supply unit
This chapter describes standard specifications of the water supply unit. If you have purchased a customized
product, some information in this chapter may not be applicable to your unit. Refer to the separately supplied
delivery specifications and other documents to check the product specifications in such a case.
3.1
Specifications of the water supply unit
Caution
Do not use this unit under any conditions other than those provided in
the specifications. Otherwise, electric shock, fire, water leakage, or
property damage may occur.
Note
If the inflow pump head is 5m or more, contact Teral. for consultation.
Table 3-1 Standard specifications of water supply unit
Operation mode
Automatic alternate operation
Automatic alternate parallel operation
Control system
Constant control of estimated terminal pressure based on frequencies/
Constant control of discharge pressure
Liquid
property
Fresh water
Applicable
liquid
Temperature
0 to 40°C
Installation location
Indoors (0 to 40°C, Max. RH85%, no condensation), Altitude: Max. 1,000m
Suction conditions
Inflow (Inflow pump head: Max. 5 m)*
Pump
(Material)
Model NX-e stainless steel horizontal multistage centrifugal pump
(Impeller: SUS304, Casing: SCS13, Main shaft: SUS304)
Type
Totally-enclosed fan-cooled type for indoor use
Protection
class
IP44
Motor
Number of
poles
2 poles
Companion flange
Dedicated companion flange
Power supply
0.4 to 1.1 kW: Single-phase 200/200-220 V (50/60 Hz)
0.4 to 7.5 kW: Three-phase 200/200-220 V (50/60 Hz)
Paint color
Common base: Munsell N-5
Pressure tank: Munsell 10Y5.5/0.5
Pressure tank
Model DPT10 (10-L diaphragm tank)
Pressure detection
device
Pressure transmitter
Transmission system: 5 VDC, 3-wire system
Output voltage: 0.5 to 3.5 VDC
Model BQNXC
type
Motor
Protection
Inverter (with electronic thermal protection)
Normal
indications
Indicator status:
Power, Pump operation (for each), Pump operation blocked (for each),
Alarm (collective)
Other indications:
Discharge pressure, Voltage, Current (for each), Operating frequency
(for each), Cumulative operation time (for each), Cumulative number of
starts (for each), Number of starts of the unit on the previous day, Alarm
log (last 5 alarms)
Alarm
indications
Receiver tank full, Receiver tank low, Dry-run prevention, Electrode failure, Start frequency
failure, Pressure transmitter 1 failure, Control panel high temperature, EEPROM error,
Overload (for each), Discharge pressure abnormal drop (for each), Electric leak (for each),
High temperature (for each), Flow switch failure (for each), Overcurrent (for each),
Overvoltage (for each), Anti-stall (for each), Inverter overload (for each), Open-phase output
(for each), Inverter overheat (for each), Communication failure (for each), Inverter trouble 1
(for each), Inverter trouble 2 (for each)
External
outputs
Power for alarm (at power voltage), Inflow solenoid valve output (at power voltage),
Operation/alarm signal (No-voltage a-contact)
Control
panel
External
inputs
External stop signal (interlock): supports a/b-contacts
*
The lifting models support up to 4 m in the actual pump head and up to 6 m in the total pump head (at 20°C water temperature).
*
If a flush valve or the like is used, a sudden pressure drop may occur, thus leading to the problems such as insufficient water
supply, noise, premature damage of the pressure tank, or others. Contact us for such cases.
