Gree FHBQ-D8-K User manual

Energy-Recovery Ventilation System
Service Manual
( GC201202-I )

II
Energy-Recovery Ventilation
System Service Manual
CONTENTS
PRODUCT ...................................................................................................................2
1 MODELS LIST ........................................ ............................................................2
2 NOMENCLATURE........................................ .......................................................2
3 FEATURES........................................ ..................................................................3
4 PRODUCT DATA........................................ .........................................................3
5 PIPING DIAGRAM........................................ .......................................................5
CONTROL....................................................................................................................7
1 OPERATION FLOWCHART.................................................................................7
2 MAIN LOGIC........................................................................................................8
3 WIRED REMOTE CONTROLLER........................................ ...............................8
INSTALLATION..........................................................................................................17
1 DIMENSION DATA ............................................................................................17
2 INSTALLATION SITE ........................................................................................18
3 UNIT INSTALLATION.........................................................................................18
4 CAUTIONS FOR INSTALLATION .....................................................................19
5 ELECTRIC WIRING WORK...............................................................................20
MAINTENANCE.........................................................................................................23
1 TROUBLE TABLE ........................................ .....................................................23
2 FLOW CHART OF TROUBLE SHOOTING ........................................ ..............24
4 DISASSEMBLY AND ASSEMBLY OF MAIN PARTS........................................ .27
5 EXPLODED VIEWS AND PART LIST........................................ ........................29

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Energy-Recovery Ventilation
System Service Manual
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PRODUCT

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System Service Manual
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1 MODELS LIST
1.1 Outdoor Unit
Model Product code Air ow (m3/h) External static
pressure (Pa) Power supply Appearance
FHBQ-D8-K(D) EH01100030
(EH01100100)
H 800 H 50/100
220V-50Hz
(208-230V-60Hz)
M 600 M 40/85
L 480 L 30/65
FHBQ-D10-K(D) EH01100040
(EH01100080)
H 820/1000 H 50
M 620/750 M 40
L 500/600 L 30
FHBQ-D15-M(D) EH01100050
(EH01100110) 1500 150 380VAC 3N 50Hz
(208-230VAC
3N 60Hz)
FHBQ-D20-M(D) EH01100060
(EH01100110) 1800/2000 50/150
FHBQ-D30-M EH01100070 2800 125 380VAC 3N 50Hz
2 NOMENCLATURE
FH B Q - D 3.5 - K
1 2 3 4 5 6
No. Description Options
1 Unit code FH: energy recovery unit
2 The structure of heat exchanger B: plate-type
3 The diathermanous mode Q: total heat exchange
4 The mode of installation D: ceiling mounted type
5Nominal Air Flow
3.5: 350m3/h;
5: 500 m3/h;
...
30: 3000 m3/h
6 The phase of power supply K: single-phase
M: three-phase

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Energy-Recovery Ventilation
System Service Manual
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3 FEATURES
3.1 Description
Our living environments are more and more affected by modern civilization. As the application of air-conditioning system
and various composite materials, popularization of ofce equipments and development of closeness of constructions and for
the purpose of energy saving and reduction of cost which cause decrease of fresh air volume, harmful gas and pollution of
creature won’t be diluted properly and replaced. Healthy, energy-saving, simple and reliable fresh-air system and equipment
has been the focus for engineers and users. Gree energy recovery ventilation system has solved this problem. This kind of
system has two-way air exchange function so that the change of indoor temp is little during air exchange. The indoor air can
be efciently ltered by the air lter. New technology and new materials and special technique applied in the unit can ensure
low energy consumption, great performance ,low noise and easy installation.
3.2 Standard Features
(1) Replacement and ventilation function
It introduces fresh air into room and discharges indoor airout of room to make you feel comfortable as in the nature.
(2) Energy-recovery function
Internal heat exchanger makes the discharged air and introduced air for cooling and heating exchange. Energy-recovery
rate above 70% keeps heat preservation and ventilation realized.
(3) Low-noise design
Special low-noise ventilation fan is set.
(4) Air ltration and purge function
Internal air lter keeps the fresh air introduced into room pure and dustless.
(5) Various series and multiple specications
There are various series to match with the buildings of various structures.
4 PRODUCT DATA
4.1 Product Data at Rated Condition
Model FHBQ-D8-K(D) FHBQ-D10-K(D)
Power supply 220VAC 50Hz (208-230VAC 60Hz)
Air ow volume (m3/h)
H 800 820/1000
M 600 620/750
L 480 500/600
External statics pressure (Pa)
H 50/100 50
M 40/85 40
L 30/65 30
Temperature exchange efciency (%)
H 70 70/72
M 72 72/74
L 74 74/75
Enthalpy exchange
efciency (%)
Heating
H 63 63/66
M 65 65/68
L 67 67/70
Cooling
H 58/57 58/56
M 60/59 60/58
L 62/61 62/60
Recommended wiring mm21.0mm2×3 1.0mm2×3
Power input (W) 400(500) 440(500)
Sound pressure level [dB(A)] 45(50) 46(53)
Dimensions
(WXDXH)
Unit (mm)
H 380 380
M 832 832
L 1016 1016
Packaging (mm)
H 415 415
M 1090 1090
L 1323 1323
Net weight (kg) 57 57

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Gross weight (kg) 66.5 66.5
Loading quantity
20'GP 40 40
40'GP 85 85
40'HQ 104 104
Standard wired remote controller Z4E35M Z4E35M
Model FHBQ-D15-M(D) FHBQ-D20-M(D) FHBQ-D30-M
Power supply 380VAC 3N 50Hz (208-230VAC 3N 60Hz)
Air ow volume (m3/h)
H
1500 1800/2000 2800M
L
External statics pressure (Pa)
H
150 50/150 125
M
L
Temperature exchange
efciency (%)
H
73 71 70M
L
Enthalpy
exchange
efciency (%)
Heating
H
65 62 62M
L
Cooling
H
60/55 58 57M
L
Recommended wiring mm21.5mm2×5 1.5mm2×5 1.5mm2×5
Power input (W) 900(1200) 1200(1450) 2800
Sound pressure level [dB(A)] 48(60) 50(61) 62
Dimensions
(WXDXH)
Unit (mm)
H 452 452 572
M 1210 1210 1340
L 1215 1215 1550
Packaging (mm)
H 485 485 700
M 1543 1543 1610
L 1553 1553 1710
Net weight (kg) 110 110 215
Gross weight (kg) 130 130 236
Loading quantity
20'GP 15 15 9
40'GP 37 37 24
40'HQ 44 44 24
Standard wired remote controller Z4E35M Z4E35M Z4E35M
Notes:
(a) The models of 220V power supply type has 3 types of fan speed and the models of 380V have one fan speed.
(b) The temperature exchange efciency and enthalpy exchange efciency are tested under these testing conditions as
below:
Cooling efciency:Indoor air 27°C DB, 19.5°C WB, outdoor temperature 35°C DB, 28°C WB.
Heating efciency:21°C DB, 13°C WB. Outdoor air temperature: 5°C DB, 2°CWB.
(3) Sound power level according to ISO 5151-sound pressure calculated at 1.5m distance.
(4) Operation condition:ambient temperature-15°C-50°C,relevate humidity less than 80％RH.

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4.2 Electrical Data
Model
Power supply Fan motor Max. fuse breaker size Min. disconnect size
V, Ph, Hz FLA Each Amperes Amperes
FHBQ-D8-K(D) 220V-50Hz
(208V-230V-60Hz)
1.0A×2 3.25A 2.25A
FHBQ-D10-K(D) 1.0A×2 3.25A 2.25A
FHBQ-D15-M(D)
380V 3N-50Hz
(208V-230V 3N-60Hz)
1.4A×2 4.55A 3.15A
FHBQ-D20-M(D) 1.4A×2 4.55A 3.15A
FHBQ-D30-M 4.2A×2 13.65A 9.45A
Notes:
(a) RLA: Rated load amperes
(b) LRA: Locked rotor amperes
(c) FLA: Full load current
5 PIPING DIAGRAM
Fresh air
Outdoor
Air discharge
Heat
exchanger
Indoor
Air supply
Room air

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Energy-Recovery Ventilation
System Service Manual
CONTROL
CONTROL

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Energy-Recovery Ventilation
System Service Manual
CONTROL
CONTROL
1 OPERATION FLOWCHART

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Energy-Recovery Ventilation
System Service Manual
CONTROL
2 MAIN LOGIC
2.1 Auto Mode
Detect the temperature indoor and outdoor for durative a period of time.
(1) The system will operate under by pass mode according to temperature and temperature difference between room and
outdoors is little in transient season.
The system will operate as such request:
By Pass air valve opens, the air discharge fan and air supply fan will operate according to setting fan speed.
(2) The system will operate under heat exchange mode according to temperature and temperature difference between
room and outdoors is large in transient season.
The system will operate as such request:
By Pass air valve closes, the air discharge fan and air supply fan will operate according to setting fan speed.
(3) The system will operate according to the primary mode before the system was off.
2.2 By-pass Mode
(1) Under By pass mode, air valve is open.
(2) The system will operate as such request:
If the air valve is close, the air discharge fan and air supply fan will stop. When the air valve is open , the fan will operate
according to setting fan speed.
2.3 Heat exchange Mode
(1) Under Heat Exchange mode, the air valve is close.
(2) The system will operate as such request:
Electrify the air valve motor, judge the position of the air valve. The air discharge fan and air supply fan will stop if the air
valve is open, or they will operate according to setting fan speed.
3 WIRED REMOTE CONTROLLER
3.1 Operation View
Fig.1 Front panel of wired controller
1 Timing set point 10 Mode key
2 Energy saving status 11 Humidity increasing key
3 Humidity set point 12 Humidity decreasing key
4 Environment temperature 13 Fan speed key
5 Air mode status (fresh air,
discharge air, supply air) 14 Switching key
6 Fan speed status (hi/medium/low) 15 Timing key
7 Mode status (Auto, Bypass,
Heat exchange) 16 On/Off key
8 Error status 17 Reset key
9 Filter cleaning status 18 Child lock icon
Notice: For FHBQ-D15 and FHBQ-D20, there is no discharge air and supply air modes for the item number 5 and fan
speed is uncontrolled for the item number 6.