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
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PRODUCT
PRODUCT

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Energy-Recovery Ventilation
System Service Manual
PRODUCT
PRODUCT
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
PRODUCT
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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PRODUCT
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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PRODUCT
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
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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.

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CONTROL
■Turn On / Off the Unit
(1) Press ON/OFF button to start the unit. (Fig.2)
(2) Press ON/OFF button once again to stop the unit.
(3) Under the “Off” status, pressing the “Mode” key for 5 seconds can activate the memory function upon power failure,
In this case, when 01 is displayed at the temperature set point area, it indicates the memory function has been activated.
When 02 is displayed, the memory function has been deactivated. Then, by pressing the ‘On/Off” key, this setting can exit.
At the setting page, if there is not any operation during 20 seconds, the control will back to the normal “Off” status. The
memory function is defaulted to be deactivated.
Fig.2
■Fan Speed Control (Fig.3,4) (The gures about relative display area, the same as below.)
As shown in the gure 3, under the fresh air mode, by pressing the “Fan” key, the fan speed will change circularly from
low speed to medium speed to high speed, which however is unavailable for FHBQ-D15 and FHBQ-D20.
Fig.3

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CONTROL
As shown in the figure 4, under discharge or supply air modes, by pressing the “Fan” key, the fan speed will switch
between low and high speed, which is also unavailable for FHBQ-D15 and FHBQ-D20.
Fig.4
■Humidity Adjustment (Fig.5)
For the unit with humidifying function, pressing the “▲” key will increase the humidity set point; while pressing the “▼”
key will decrease the humidity set point. Each press will make the set point change by 5%.
When pressing the “▲” and “▼” keys at the same time for ve seconds, “EE” and a lock icon will be displayed. In this
case, all key operation will be deactivated. Then, by pressing the “▲” and “▼” keys at the same time for ve seconds again,
the lock function will be deactivated.
When the control is deactivated by remote monitoring or central control, “CC” will be displayed and all key operation and
remote signals are invalid.
The humidity range is 30%-70% (RH).
Fig.5

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CONTROL
■Reset/ Switch Function Setting (Fig.6)
When it is required to clean the unit, the beeper will raise an alarm for 30s. In this case, by pressing the “Reset” key for
ve seconds, the runtime for cleaning will become zero, the beeper will stop and the cleaning symbol will disappear.
When the unit is turned on, by pressing the “Timer” key and then quickly pressing the “Switch” key, it will switch to timer
for stopping the unit, timer for activating energy saving, timer for deactivating energy saving, and timer for cleaning circularly.
Fig.6
■Running Mode Setting (Fig.7)
By pressing the “Mode” key, the run mode will change circularly from automatic to bypass to heat exchange.
Under the automatic mode, “AUTO” will light on and the system will operates base on indoor and outdoor temperatures
as well as the temperature difference.
Under the bypass mode, “BYPASS” will light on. When the damper is opened, the fan will work based on the air mode
and fan speed settings. This mode is generally applicable to transitional seasons and will extend the service life of the heat
exchanging core.
Under the heat exchange mode, “HEAT EXCHANGE” will light on. When the damper is closed, the fan will work based
on the air mode and fan speed settings. In this mode, it can realize all heat exchange for fresh air, saving more energy and
being much healthier.
Fig.7

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CONTROL
■Timer Setting (Fig.8)
In off status of the unit, timer on can be set and in on status, timer off, energy-saving on and energy –saving off and air
clear can be set.
Press Timer button into timer setting status. TIMER,Hr and letters corresponding setting will blink.
(E.g.during timer off setting, Timer,Hr and OFF will ash).In this case, the user can press ▲or ▼to increase or decrease
setting time. Repress Timer button to make the timer valid and the timing will be Fig.9 calculated after that. When the unit is
under timer state, press theTimer button to cancel it. The time interval is 0.5 hr.
The setting range of Timer on/off is 0.5-24hr.
The setting range of Energy Saving On is 2-5hr and the default is 2hr.
The setting range of Energy Saving Off is 1-4hr and the default is 1hr. (Note: press FAN and ▼ at the same time for 5s
only after energy saving timer setting, the energy saving function can operate.
The setting range of Timer Clear is 1250hr, 2500hr and a variable to be determined. The default is 1250hr.
Fig.8
■Ambient Humidity Display
Under normal state, only indoor ambient humidity is display at ENV.
Notice: For the unit with humidifying function, the humidity will be displayed only when this function is activated.
■Humidifying ON/OFF Display
Press MODE and ▼at the same time for 5s to switch between humidifying ON/OFF.
Note:The unit with humidifying function can normally run. The indoor humidity and setting humidity can be displayed only
If this function is on. The default is OFF. It is recommended to ON in dry period. The ttings are optional.
■Fan Mode Display
Press FAN and ▲ at the same time for 5s to switch among half-half air exchange, discharge and supply. Refer to Fig.1
for details. The fan mode is selected by the users. E.g. plus pressure is needed in the room, fan mode can be adopted and
if negative pressure is needed, air discharge mode can be adopted. Half-half air exchange is for normal station.
■Energy Saving Mode Display
Press FAN and ▼ at the same time for 5s to switch between energy saving on/off. If under energy saving on state,
Energy Saving will be displayed. Refer to Fig.1 for details. If the unit needn’t operate for a long time, energy saving mode
can be adopted to meet the demands of both function of fresh air exchange and quality of indoor air by users.
■Intelligent Start/Stop
It is also called the central control for dampers, which are used for multiple rooms but are under the control the one unit.
It can totally control eight dampers. A patching board is required.

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CONTROL
■Address Setting
Fig.9
When the unit is off, by pressing the “Mode” and “Switch” keys at the same time for ve seconds, it is able to set the
address of the control (1~16). At this point, address can be increased or decreased by pressing the “▲” or “▼” key. This
address intends to distinguish different dampers. The default address is 16. By pressing the “On/Off” key, this setting will
exit. When there is no any key operation in 20 seconds, this setting ends and becomes valid.
3.2 Dimension
6
Panel dimension and installation dimension

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CONTROL
Bottom panel dimension and installation dimension
3.3 Installation
Locate the installation position rstly, and then reserve a groove or hole for embedding of communication wire according
to its dimension.
If wired controller and indoor communication wire are mounted visibly, 1 ＃PVC pipe can be used and corresponding
grooves should be set in the wall. If in hidden, 1 ＃PVC pipe can be used.
Whether mounted visibly or in hidden, drill two holes (keep level) in the wall as the distance (60mm)between the two
holes in underplate of wired controller, and then inset stopper into the holes through which the wired controller can be xed.
Insert communication wire in the control board. At last, clasp the controller panel.
Note: During installation of underplate of wired controller, pay attention to its direction. The side with 2 breaches must be
kept downwards.
PVC pipe

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CONTROL
No. Name Remarks
1 Wall
The appearance of the controller
should be subject to entity.
2 Underplate of wire controller
3 Screw M4X10
4 Controller panel

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INSTALLATION

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Energy-Recovery Ventilation
System Service Manual
INSTALLATION
1 DIMENSION DATA
Fresh air
outlet
Room air
inlet
Fresh
air inlet
Room air
outlet
Uint: mm
Model A A1 B B1 C C1 D E F G H N
FHBQ-D8-K(D) 1016 960 832 884 380 165 90 150 230 155 372 246
FHBQ-D10-K(D) 1016 960 832 884 380 165 90 150 230 155 372 246
FHBQ-D15-M(D) 1215 1159 1210 1262 452 200 100 190 277 178 737 297
FHBQ-D20-M(D) 1215 1159 1210 1262 452 200 100 190 277 178 737 297
WL
W2
B2
B1
B
W1
Fresh air inlet
Room air inlet
Room air outlet
L1
Electric
box
H
H1
A2
A
A3
A1
Flange dimension
Fresh air outlet
Uint: mm
Model L L1 W W1 W2 H H1 A A1 A2 A3 B B1 B2
FHBQ-D30-M 1550 1650 1340 1310 670 572 249 346 386 180 366 332 372 352

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2 INSTALLATION SITE
Room air outlet Fresh air inlet
Service space
Fresh air outlet Room air inlet
During installation, the two ducts (fresh air inlet and indoor air outlet) outside the room must be installed with anti-
condensate and heat insulating materials, and the ones inside the room should also be installed with them if temperature
and humidity in the ceiling is high. The ducts outside the room should be kept inclined 1/50~1/30 to avoid water into room.
In order to clean and maintain the lter and heat exchanger core in the system, do keep service space, as shown in the
picture above.
3 UNIT INSTALLATION
A
ir discharge duct
Room air inlet Fresh air outlet
Indoor air suppl
y
Indoor air
return
Room air outlet
Insulation material
Exhaust air duct
Fresh air duct
Fresh air inlet