ERAF 0921A - Water pump GREE - Free user manual and instructions

Product Type	Water Pump
Brand	Gree
Model	ERAF 0921A
Pump Type	Centrifugal
Dimensions (W x H x D)	30 cm x 25 cm x 20 cm
Weight	8 kg
Power Rating	750 W
Voltage / Frequency	220-240 V / 50 Hz
Max Flow Rate	60 L/min
Max Head	30 m
Inlet / Outlet Diameter	1 inch (25 mm)
Housing Material	Cast Iron
Impeller Material	Stainless Steel
Protection Class	IPX4
Noise Level	70 dB
Features	Thermal overload protection, dry-run protection
Maintenance	Clean inlet filter monthly; check seals annually
Safety	Do not operate without water; keep away from children
Spare Parts	Available from Gree authorized service centers
General Information	Suitable for garden irrigation and water transfer

Frequently Asked Questions - ERAF 0921A GREE

What type of liquid can this pump handle?

This pump is designed for clean water only. Do not use with abrasive, corrosive, or flammable liquids.

How do I prime the pump before first use?

Fill the pump casing and suction line with water through the priming plug. Ensure no air is trapped before starting.

What is the maximum suction lift?

The maximum suction lift is 8 meters. For optimal performance, keep the suction line as short and straight as possible.

Can the pump run dry?

No, running the pump dry will damage the seals and impeller. The pump has a dry-run protection feature, but it should not be relied upon continuously.

How often should I clean the filter?

Clean the inlet filter every month under normal use. More frequently in dirty water conditions.

What should I do if the pump loses prime?

Check for air leaks in the suction line, ensure the strainer is not clogged, and re-prime the pump. If the problem persists, inspect the foot valve.

Is the pump suitable for rainwater harvesting?

Yes, it is suitable for clean rainwater. Ensure the water is free of debris that could clog the impeller.

How do I winterize the pump?

Drain all water from the pump and pipes, and store the pump in a frost-free location. Remove the plug and turn the shaft manually to prevent freezing.

What is the warranty period?

Gree offers a 2-year warranty against manufacturing defects. Keep your purchase receipt for service claims.

Can I use an extension cord?

Use only a heavy-duty extension cord with a ground conductor, rated for the pump's amperage. Keep the cord as short as possible to avoid voltage drop.

USER MANUAL ERAF 0921A GREE

Exterior view of a Schneider Electric industrial control unit (no visible text or symbols beyond branding)

Water Input Reg. SetP. On C 07.0 Mode: Set Point Standard

Auto E/I com.

On Ext. Temp.:No

On Hot to: °C 00.0

On Cold to: °C 00.0

Commutation delays

in Hot in min 000

in Cold in min 000

I/O via Contact	N
I/O via Serial	N
E/I via Contact	N

(From Remote Control)

Hours/Minutes 12:00 TT/MM/JJ 01/01/13 Day of the week Fri

Clock

Daylight savings time: OFF

Trans. Time 000min

Start: ---

in --- at ---.00

End: ---

in --- at ---.00

Clock
Daylight savings time:
Trans. Time	060min
Start:	Last Sunday
in March at	02.00
End:	Last Sunday
in October at	03.00

Unit on cycles

Enable:	YES
SetPoint 1	7.0
SetPoint 2	10.0

Unit on cycles

MON copy to TUES: NO00.00 + 00:30

00-08:_ _ _ _ _ _ _ _

08-16:_ _ _ _ _ _ _ _

16-24:_ _ _ _ _ _ _ _ _

EINSTELLUNGEN

NO	MODBUS MASTER
MOD_MB_Protocol_MNG
Version:2.3 04/11/10
1st Master
Sublist number:	00
Sublist trigger:	■
General trigger:	■
Polling time:	000ms

Circulation Pumps: 2 Variable Speed: Y

Control Type: Modbus

UNIT CONFIGURATION

Fans Type: EC

EINSTELLUNGEN

Danfoss ETS 12.5 0 25B

(IG Slave Address:21)

Aux:Main

12:00 01/01/15 LAN 01

T.Water OUT°C 7.0

Energy Power Meter: Y

Type=S= PM3250

(Slave Address:20)

UNIT CONFIGURATION
Isolating Valve	Y
CtrlMode:Y
ON Delay Time s	60

PUMP DOWN CONFIG.
Enable	N
Max.Time:	sec 20

SENSOR OPTIONAL
Water Pressure	N
Freigabe Remote	N
Wat. T.Sens	N
Refr. Liquid Temp.	N
Additional Temp.
	N

PRESSURE TRANSDUCERS
High Press.Sensor
Range Begin kPa	0
Range End kPa	3500

PRESSURE TRANSDUCERS
Water
Range Begin kPa	0
Range End kPa	1000

REMOTE CONTROL
I/O via Contact	N
I/O via Serial	N
E/I via Contact	N

EINSTELLUNGEN

Full Charge Last Power Fail. 000

Fan Speed Setting (summer)
On: 25 C	Off
Ramp begin.	(Aus):
Ramp ending	20°C
	28°C
Ultra Quiet(High Ramp45°C
Ramp2 begin.
Ramp2 begin.

Fan Speed Setting (summer)
DT.Ext-Cond Min.	7.0°C
Integral Time	100s
Derivat. Time	0s
Time Pulse Start	120s

Fan Speed Reg. (Winter)
On:17°C	OFF:18°C
Ramp begin.	16°C
Ramp ending	12°C

Water Flow FS Alarm:N

Cond.Temperature Limit

HEAT RECOVERY

Water Flow FS Alarm

FS Start Delay

s00

FS Run Delay

s00

EINSTELLUNGEN

• 0–10Vdc
• 0–20mAmp
• 4–20mAmp
• Digital Input
  • R S 4 8 5 O M I
  • LAN from Unit 1

SETPOINT REMOTE Offset Enable: Y 0-10V Signal

Opt.SetP. °C 00.0 Zero Adj. mV 00

Signal \$ 0.0

SETPOINT REMOTE Offset Enable: Y RS485 OMI Signal

Max Offset 9C: 5.0

Signal § 0.0

SETPOINT REMOTE Offset Enable: Y LAN From Unit 1

Max Offset 2C: 5.0

Signal § 0.0

(Autoadaptive oper.)

Act.Head Pres.kPa 0000

Al.Max Speed 100.0%

Set Head Press.kPa 150

Pump Inverter

CTRL Head Press:Y

(Flexible operat.)

Act.Head Pres.kPa 0000

Speed request 000.0%

Pump PID Regulation

Act.Head Pres. kPa 000

Set Head Press.kPa 000

Prop.Band 0000

Int.Time s 000

Der.Time s 000

Usage of Pres.Values

Local

EINSTELLUNGEN

(Read only) Min frequency: 0.0Hz Max frequency: 0.0Hz

Accel.time: 0.0s decel.time: 0.0s

Power Supply Settings Thresh. Failure V20.0 I.G. Time Ch. Over s20

UCAP Recharge Time s300 Max Time Life s60 Delay Work Alarm s10

Emergency Recovery

Enable: Y

Activ.At Power ON If Temp wout>SetP+9C 6.0

DELAY SETTINGS

Power On Delay s 000 Start Trans. s 20 Temp.Al.Delay min 15

DELAY SETTINGS

FS Start Delay s 10 FS Run Delay s 5 Pump Changeover h 12

COMPRESSOR TIMING

Cycle minimum s 360 Minimun Run Time s 120 Minimun Off Time s 180 Between 2 diff. s 75 Betw.2 diff.min. s 30

F.C. K Multipl. 2.0

EINSTELLUNGEN

Sample Time: 00:00:00

Reset graph: N

Autoscale: N

Low limit: 000

High limit: 000

EINSTELLUNGEN

Sensorkalibrierung

Read Value 9C 000.0 Adjustment 9C 00.0

SPEICHERVORGÄNGE

Program Set up N A1.Page Clear-up N

PROGRAM SETUP [Programm-Setup]:

Default installation running....

Please wait

switch-off and back on the controller

WARNING: Too many BMS Write from BMS

Legend: N.O.: Normally Open N.C.: Normally Close

Water Flow = A Water Flow Serious AR Pump Therm. Switch = A

Antifreeze B Antifreeze Serious AR High Ev.Water IN T. B Low Ev.Water In T. B

High Pressure AR Compr.Thermal =B Compr.Thermal Ser. AR Low Pressure =B Low Pressure SeriousAR

I.G. Offline =B Too Much ChangeOver A

Unit IN Sensor =-- Unit OUT Sensor =AR Ext.Air Sensor =B Water Tank Sensor =B Cond.Press.Sensors A Evap.Press.Sensors AR T.Liquid Sensors =B Additional Probe =B

Phases Sequence =B Phases Sequence Ser. AR EEPROM =AR Supply Frequency =AR Wrong Password =-- Fan Thermal =B Fan Thermal Serious AR Fuse Fault =A

Pumps Run Hours =-- Compr. Run Hours =--

LAN Interrupted =A BMS Error =--

Heat Recovery: - Not Possible =B - Locked =AR

Water IN/OUT Sensor A Exp.Board Offline =AR

Water Press.Sensors B Hi/Low Water Press. A Inverter P. Offline AR Inv. P. Not Serious B Inverter P. Serious A

Gas Detector = B Gas Det. Run Months B

Display address
Setting......:11
I/O Board address: 01 

Display address
Setting.....:00 

Display address
Setting......:11
I/O Board address: 01 

Display address
Setting.....:00 

Display address
Setting......:12
I/O Board address: 02 

P:02 Adr Priv/Shared Trm1 12 Pr Trm2 32 Sh Trm3 None --

graph TD
    A["pLAN 32 GEMEINSAM"] --> B["6.54.3.2.10"]
    B --> C["1231.2.3"]
    C --> D["8.5.4.3.2.10"]
    D --> E["1231.2.3"]
    E --> F["1231.2.3"]
    F --> G["1231.2.3"]
    G --> H["1231.2.3"]
    H --> I["1231.2.3"]
    I --> J["1231.2.3"]
    J --> K["1231.2.3"]
    K --> L["1231.2.3"]
    L --> M["1231.2.3"]
    M --> N["1231.2.3"]
    N --> O["1231.2.3"]
    O --> P["1231.2.3"]
    P --> Q["1231.2.3"]
    Q --> R["1231.2.3"]
    R --> S["1231.2.3"]
    S --> T["1231.2.3"]
    T --> U["1231.2.3"]
    U --> V["1231.2.3"]
    V --> W["1231.2.3"]
    W --> X["1231.2.3"]
    X --> Y["1231.2.3"]
    Y --> Z["1231.2.3"]
    Z --> AA["1231.2.3"]
    AA --> AB["1231.2.3"]
    AB --> AC["1231.2.3"]
    AC --> AD["1231.2.3"]
    AD --> AE["1231.2.3"]
    AE --> AF["1231.2.3"]
    AF --> AG["1231.2.3"]
    AG --> AH["1231.2.3"]
    AH --> AI["1231.2.3"]
    AI --> AJ["1231.2.3"]
    AJ --> AK["1231.2.3"]
    AK --> AL["1231.2.3"]
    AL --> AM["1231.2.3"]
    AM --> AN["1231.2.3"]
    AN --> AO["1231.2.3"]
    AO --> AP["1231.2.3"]
    AP --> AQ["1231.2.3"]
    AQ --> AR["1231.2.3"]
    AR --> AS["1231.2.3"]
    AS --> AT["1231.2.3"]
    AT --> AU["1231.2.3"]
    AU --> AV["1231.2.3"]
    AV --> AW["1231.2.3"]
    AW --> AX["1231.2.3"]
    AX --> AY["1231.2.3"]

Standby Unit Mode ON:

Standard

Sustain Unit OFF s 00

LAN CONFIGURATION Reg.Step Calling Mode: Standalone

Usage of Temp.Values Mode: Local

LAN CONFIGURATION Reg.Step Calling Mode: Standalone

Usage of Temp.Values Mode: Mean Mean/Loc.Diff. °C 0.0

EXV-EINSTELLUNGEN

HINWEIS

COMPR.	EXV
25%	60%
50%	75%
75%	90%
100%	100%

EXV Power Cooling

Press.Prob. Failure:

At Comp.Start

At Normal Working

ALARMAUSGABEN

Pump 1 Stopped Check Motor protection/ Contactor

Input Water Temp. Over Maximum Limit

Input Water Temp. Over Minimum Limit

Compr. 1 Overload Check Absorption/

ALARMAUSGABEN

with Incorrect Pass-word

(At least 3 Attempts)

Interrupted or Fault:

Check Probe/Connect

Flow switch fault Check commutation contacts/Connect

Antifreeze Circ. 1 Check Evap. Clean/ Load Refrigerant

(Automatic Reset)

Driver EXV Circ.1: No communications Tlan Interrupted

EXV1: Suct. T. Probe Interrupted or Fault: Check Probe/Connect

Driver EXV Circ.1: MOP Prot. Failed

Driver EXV Circ.1: LOP Prot. Failed

Driver EXV Circ.1: LowSSH

ALARMAUSGABEN

⚠️ Heat recovery not possible (out of limits)

pCOe: Expansion board Not Connected

⚠️ Fan Overload protection

Low P.Hydraulic Circ.

High P.Hydraulic Circ.

Fuse 230V F1 Electrical Resistance Fault

ALARMAUSGABEN

Freecooling Driven Valve Blocked (Full Open)

OMI Not Connected Check RS485 Line

Emergency Recovery
Parameter Einht DEF.
Twout > SetP+ °C 6,0
Power OFF Time	s	0
Maximum Em. Rec. Time	s 0
Timed ON	s	10
DT Rated Water	°C 0,0

Verzögerungseinstellungen
Parameter Einht DEF.
Power On Delay	s	0
Start Trans.	s 20
Temp.Al.Delay	Min.	15
FS Start Delay	s 10
FS Run Delay	s 03
Pump Changeover	h 12

Compressor Timing
Parameter Einht DEF.
Cycle Minimum	s 360
Minimum Run Time	s 180
Minimum Off Time	s 60
Between 2 diff.	s 75
Betw.2 diff.min.	s 30
F.C. K Multipl.	s 20
LP-Start Delay	s 90
LP-Run Delay	s 10

Offset Adjustment
Parameter Einht DEF.
Adjustment	°C 0,0