HOLTOP ERVQ-D150-2A1 User manual

Models:
ERVQ-D150-2A1
ERVQ-D250-2A1
ERVQ-D350-2A1
Attention
Please read this manual carefully before using the equipment. For safety precautions,
please read carefully before construction or use, and use the equipment safely.
Beijing Holtop Air Conditioning Co., Ltd.
Technical Manual of Holtop
Energy Recovery Ventilator

Safety Considerations----------------------------------------------------------3-4
Unit Specifications-----------------------------------------------------------------5
Dimension--------------------------------------------------------------------------6
Installation Considerations------------------------------------------------------7-9
Electrical Installation----------------------------------------------------------10-11
Precautions for use---------------------------------------------------------------12
Controller Instructions--------------------------------------------------------13-20
Maintenance-----------------------------------------------------------------------21
Failure diagnosis------------------------------------------------------------------21
Contents

Please read the following safety instructions before installation. And ensure that the unit is installed
correctly.
Please observe all instruction in order to avoid any injury or damage to equipment or property.
The following symbols indicate potential levels of caution.
Situations with a risk or death or
serious injure. Situations with a risk of injury or equipment/property damage.
The following symbols indicate compliance which must be observed
Not allowed or Stop Must follow or obliged
Safety attentions
Installation to be carried out by qualified
person, End Users must not install, move or
re-install this equipment by themselves
An anti-bird net or similar device should be
installed to outside vents. Ensure there are
no obstructions to or in the ducts
Installation engineers must follow this man-
ual strictly. Improper action can create a
health hazard and reduce efficiency of the
unit
Fresh air vent must be far enough away
from any flue gas discharge or areas where
hazardous vapors are present
Unit must be installed strictly following this
manual and mounted to a weight bearing
surface for the weight of the unit
Electric engineering must follow national
regulations and the manual, use special ca-
bles. Less capacity cables and improper en-
gineering can cause electric shock or fire.
During maintenance or repair, the unit and
circuit breaker must be switched off. Other-
wise electric shock could occur.
Ground wire cannot be connected to gas
pipe, water pipe, lighting rod or telephone
line etc. Incorrect grounding can cause
electric shock.
3
Safety Considerations

Do not install the unit in an extremely hu-
mid conditions, as it may result in electric
shock and pose a fire risk.
Do not use the units as the primary kitchen
extract grease and fatty deposits can block
the heat exchanger, filter and pose a fire
risk.
Don not install the unit in areas there any
poisonous or caustic gases are present.
Do not install the unit near open flame as it
may result in over heating and pose a fire
risk
Acidic or alkali environments can cause poi-
soning or a fire Rated supply voltage must be maintained, otherwise this may cause fire.
Power cable and wires must be installed by
a qualified electrical engineer. Improper
connection can cause over heating. Fire and
loss of efficiency.
To avoid condensation, insulation should be
fitted to fresh air ducts. Other ducting may
also require insulation depending on dew
point conditions.
Insulation between the metal ducting and
wall penetration must be installed if the
ducting penetrates metal wall cladding, to
avoid risk of electric shock or current leak-
age.
The cover of wiring box must be pressed
down and closed to avoid dust and dirt en-
tering. Excess dust and dirt can cause over-
heating of terminals and result in fire or
electric shock.
Use only approved installation hardware
and accessories. Failure to observe can re-
sult in fire risk, electric shock and equip-
ment failure
Where the unit is positioned, at high level in
a hot humid situation. Please ensure suffi-
cient ventilation is available
The outdoor ducts must be installed facing
downwards to avoid rain water entering.
Improper installation can cause water leak-
age.
Correctly sized MCB must be fitted to the
unit suitable earth leakage protection
should also be installed to avoid risk of elec-
tric shock or fire.
4
Safety Considerations
Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
Means for disconnection must be incorpo-
rated in the fixed wiring in accordance with
the wiring rules.
Prior to cleaning or other maintenance, the
appliance must be disconnected from the
supply mains.
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved.

Specifications
5
Model ERVQ-D150-2A1 ERVQ-D250-2A1 ERVQ-D350-2A1
Airflow(m3/h)
L 120 210 240
M 150 250 350
H 150 250 350
External pressure(Pa)
L 45 35 40
M 70 50 110
H 90 100 130
Enth. Eff (%)
Cooling
L 61 57 62
M 59 55 57
H 59 55 57
Heating
L 75 70 73
M 73 68 68
H 73 68 68
Temp. Eff (%)
L 82 75 81
M 80 73 76
H 80 73 76
Noise dB(A)
L 23 26.5 31
M 31 33.5 36.5
H 35 35 37
Voltage (V) 220 220 220
Input Power (W)
L 93 123 209
M 98 148 230
H 102 150 233
Weight (Kg) 29 32 42
Duct Size (mm) Φ100 Φ150 Φ150

Dimensions
Model A B C D E F I M N
ERVQ-D150-2A1 685 860 70 122 920 618 405 220 Φ98
ERVQ-D250-2A1 700 930 70 122 990 633 425 220 Φ144
ERVQ-D350-2A1 820 1070 70 132 1130 753 550 230 Φ144
Dimensions
6
DI
A
E
M
N
C
52
13
17
R6.5
Detailed dimensions of lifting parts
20.5
F
SA
RA
EA
OA
B
Model：ERVQ-D150-2B1～ERVQ-D350-2B1
ERVQ-D150-2A1 to ERVQ-D350-2A1

2. Be sure the ceiling height is no less than the Figures in above table B column。
B
ERVQ-D150-2A1/ERVQ-D250-2A1 ERVQ-D350-2A1
Model Inner ceiling height B
ERVQ-D150-2A1 270
ERVQ-D250-2A1 270
ERVQ-D350-2A1 280
Installation Considerations
1.Protect the unit to avoid dust or other obstructions entering the unit and accessories during installa-
tion, or whilst in storage on site. Service ports should be installed to allow access for filter maintenance.
Installation Considerations
7
SERVICE PORT
RA
SA
OA
EA
215 500
500
245
580
580
SA
RA 0A
EA
SERVICE PORT

3. Unit must not be installed close to boiler flues.
4. Following phenomenon should be avoided in the ducting installation.
Serve bends Multiple reducers/ crimped duct
Multiple direction changes
5. Exessive use of flex-duct and long flex-duct runs should be avoided.
6. Fire dampers must be fitted as per national and local fire regulations.
7. Unit must not be exposed to ambient temperature above 40℃and should not face an open fire.
8. Take action to avoid dew and frost.
As shown by drawing below, unit will produce dew or frost when saturation curve is formed from A to C.
Use pre-heater to ensure conditions are kept to right of the curve (B to B＇,to move C to C) to prevent
condensation or frost formation.
9. To avoid the outdoor exhaust air cycling back to indoor, the distance between the two vents installed
on the outside wall should be over 1000mm.
10.If heater is equipped to the unit, operation of heater should be synchronous with the unit, so that the
heater starts to work only when unit starts.
11.Duct muffler may be considered if user wants indoor noise to be minimized.
天花板吊装螺杆
(Φ10-Φ12)
螺母
垫圈
吊装部件
垫圈
螺母
Suspending screw pole
Nut
Gasket
Suspending Part
Gasket
Nut
Physical Installation
1.Installer to prepare suitable threaded hangers with adjustable nuts and gaskets.
2.Install as shown by the image above. Installation must be level and securely fastened.
3.Failure to observe proper fixing could result in injury, equipment damage and excessive vibration.
Uneven installation will also effect damper operation.
4.Notes for reverse installation of the unit, Reverse labeling shows the unit is upside down.
Installation Considerations
8

Ducting
1. Connection of unit vents and ducts should be taped or sealed to prevent air leakage, and should com-
ply to relevant guidelines and regulations.
2. The two outdoor vents should face downward toward the outside to prevent any rain water ingress.
(angle 1/100 1/50).
3. Insulation must be with the two ducts outside to prevent condensation.
Material: glass cotton, Thickness: 25mm
坡度1/100-1/50
Gradient1/100-1/50
Installation Diagram
OA Return Air
SA
RA
Return Duct
Outside Fresh Air Duct
insulation
EA
Exhaust Duct
Supply Duct
Supply Air
Suspending Pole
Installation Considerations
9

Power must be isolated during installation and before maintenance to avoid injury by electric shock. The
specifications of cables must strictly match the requirements, otherwise it may cause performance fail-
ure and danger of electric shock or fire.
Power supply is AC220-240V/50HZ/1 Phase. Open the cover of electrical box, connect the 3 wires (L/N/
PE) to the terminals and connect the cable of the control panel to the board according to the wiring dia-
gram, and join the control panel to the cable. A cable fixing device offered by installer is recommended
to fix the power cable on the wall/ventilator.
We do not accept any liability for any problems caused by the user’s self and non-authorized re-
engineering to the electrical and control systems.
Model Spec. of power supply cable Spec. of normal controller cable
ERVQ-D150-2A1
3×1.5mm2 2×0.5mm2
ERVQ-D250-2A1
ERVQ-D350-2A1
Electrical Installation
10

Electrical Installation
Model Power supply Panel type
ERVQ-D150-2A1
220V~50Hz HDK-CK-AC
ERVQ-D250-2A1
ERVQ-D350-2A1
Wiring Diagrams
11
Valve
Heater1
1059
Heater2
Error
RUN
Temp3 Temp4
RH
Input1 Input2 Input3 Input4 A B
C02
Temp1 Temp2
Display
L N PE
FAN2
FAN1
N
H
AC220V
ML
N
HML
SA temp.
FR(EA) temp.
OA temp.
RA temp.
Electrical preheating
Electrical heating
Running signal
Fault signal
CO2 sensor
Bypass control switch
Differential pressure signal input
External ON/OFF signal Fire signal input
Reserved port for RS485 connection
Temperature and humidity sensor
Control panel
Exhaust
fan Supply
fan
Blue
Yellow White Black Blue
Yellow White Black
PCB Board
Master slave panel communication
L N PE
(Default is short circuit)

Loose or incorrect wiring connection can
cause explosion or fire when the unit starts
to work. Use only rated power voltage.
Don’t put fingers or objects into vents of
fresh air or exhaust air supply. Injury may
be caused by the rotation of the impeller.
Don’t install, move or re-install the unit by
yourself. Improper action may cause unit
instability, electric shock or fire.
Don’t change, disassemble or repair the
unit by yourself. Improper action may cause
electric shock or fire.
Running the unit continuously in an abnormal
status may cause failure, electric shock or
fire.
Switch off the power and breaker when you
clean the exchanger.
Don’t site intake supply vent in hot and hu-
mid
conditions , as it may cause failure, current
leakage or fire.
Don’t put any burner directly facing the
fresh air discharge, otherwise it may cause
an insufficient burning.
Isolate power during extended off periods
Isolate power and take care when cleaning
unit. (Risk of electric shock)
Observe guidelines and regulations relating
to incomplete combustion when use is asso-
ciated with fuel burning appliances.
Clean the filter regularly. A blocked filter may
result in poor indoor air quality.
Commissioning
1. Check the wiring after the installation works are completed, and there must be commissioning.
2. Turn on the power supply, and carry out the commissioning and operation according to controller
instructions. Check the working conditions of the blower, exhaust fan and bypass. The motor will stop
running for more than 10 seconds when the bypass valve of the ventilator is operating.
3. When abnormalities occur in commissioning, it can be thought that the connection is wrong. To
prevent electric shock, please turn off the special circuit breaker immediately and reconnect the wire
correctly
Precautions for Use
12
Precautions for Use

Display screen and Buttons
Repair
MODE Button UP Button DOWN Button SET Button ON/OFF Button
Auto mode
Filter alarm
Bypass on/off
sleep Fan speed Temperature display
Weekly timer on/off
Week
Communication
Clock
Temperature type
Operation Instructions
1. On/off button: turn on or turn off the equipment. When it is turned on, the back light of the display
screen will be on, and it will be off if there is no operation within 30 seconds ;when the back light is off
under the power on state, press any button and it will be on again ; press On/off button for more than 6
seconds to lock the screen, and press it again for more than 6 seconds to unlock it. Do not operate un-
der the lock state. When the equipment is off, the display screen goes out. The air volume mode is kept
as that before the machine is off when it is turned on again.
2. Press MODE to switch to display the detected items: the default interface in starting up is RA. Press-
ing lightly the MODE button, the users can choose or switch to the state of other detected items. The
sequence is RA-OA-FR(EA)-SA-Setting-CO2-Humidity (indoor temperature - outdoor temperature - ex-
haust temperature - supply temperature - setting temperature - concentration of carbon dioxide - hu-
midity) - timer on/off mode - sleep mode, which will be switched in cycle.
Interface display of timer on/off mode: time, week, timer on, timer off, air volume and indoor tempera-
ture.
Interface display of sleep mode: sleep icon, time, week and indoor temperature.
13
Touch Screen Controller Introduction

RA temperature OA temperature
COMM COMM
COMM COMM
SA temperature
FR temperature
SA temperature setting CO2 concentration
COMM
HUMI. Setting humidity
Current humidity
Humidity control
Timing on/off mode Sleep mode
14
Touch Screen Controller Introduction

1) Fan speed setting in manual mode: under SA or FR temperature interface, press the arrow keys of
“△” and “▽” to set the fan speed. The speed of exhaust fan can be set in "FR" interface, while the
speed of the supply fan can be set in "SA" interface. There are 3 speeds of AC controller. For DC con-
troller, there are 10 speeds.
2) Fan speed setting in automatic mode: four periods timer
It is allowed to set 4 periods per day, 7 days per week, under every time period, user can set a fan
speed, then when the ventilator enter the very time period, it will automatically change the fan speed
according to the setting.
Time setting,
In the timer setting interface, long press the SET button to start time setting, at this time “hour” flash-
es. Press the up and down buttons to adjust the hours, after hours setting one, short press the SET but-
ton again to enter “minute” and “week” setting, under the same way to set “minute” and “week”, then
press Mode button or On/off button to exit the setting.
Timer setting
In the timer mode interface,
short press the SET button to start timer setting. At this time “week” flashes, press the UP and DOWN
button to select the “week”,
short press SET button to set the first period “hour”, press the UP and DOWN button to select the hour
Short press SET button to set the “minute”, press the UP and DOWN button to select the minute
Short press SET button to set the SA fan speed, press the UP and DOWN button to select the fan speed
Short press SET button to set the EA fan speed, press the UP and DOWN button to select the fan speed
After the first period setting is done, system will automatically change to be the second period setting.
After 4 periods setting is done, then system will automatically change to be week setting again. Repeat
the setting like the above way then press the MODE button or On/off button to exit setting.
Note: if without operation for over 10 seconds, the system will exit setting automatically.
3. Fan speed setting:
Time setting Timer setting
15
Touch Screen Controller Introduction
4. Temperature setting function: in temperature setting interface, press the arrow buttons of
“△” and “▽” to adjust the setting temperature within the range of 15 to 30℃. If the supply air tem-
perature is higher than the setting temperature, the electric heater will stop, and the p-heat and r-heat
icons will disappear. If the supply air temperature is equal to or lower than the setting temperature
(temperature difference within 5 celsius), the first stage electric heater will start and the p-heat icon
appear, If the supply air temperature is 5 celsius lower than the setting temperature, the first and the
second stages electric heater will both start and the p-heat and r-heat icons appear. If the supply air
temperature is 2 celsius lower than the setting temperature, the second stage heater will stop, If the
supply air temperature is higher than the setting temperature, 2 stage heaters stop. Please note that
this function is only effective when the electric heater is connected to the PCB. And parameter number 5
(heater function) is set to be value 1 to active this function.

5. Setting parameters: long press the "MODE" button for more than 6 seconds under the power
on state to enter into the interface for parameters setting.
COMM
Parameter number
Parameter value
And then shortly press the "SET" button, the parameter number will increased accordingly. After choos-
ing the corresponding parameter item, press the arrow buttons of "△" and "▽" to adjust the parameter
values. When all setting is done, press the "SET" button to switch to the next item.
Attention:
1) After parameters setting, system need around 15 seconds to record, during this period power should
not be off.
2) Please refer to below valid parameters table to set the suitable parameters according to different re-
quests.
No. Contents Range Default Unit Record Position
1 Power to auto restart 0 - invalid, 1-valid 1 Main control
2 Automatic bypass function 0 - invalid, 1-valid 0 Main control
3 Bypass opening tempera-
ture X 5-30 19
℃Main control
4 Bypass opening tempera-
ture range Y 2-15 3
℃Main control
5 Electric heating setting 0 Electric heating off
1 Electric heating on 0 Main control
6 Conventional defrosting 0 - invalid, 1-valid 1 Main control
7 Defrost interval 15-99 30 Minute Main control
8 Defrost entering tempera-
ture +5~-9 - 1 ℃Main control
9 Defrosting duration time 2-20 10 Minute Main control
10 CO2 display/ valid/ invalid 0 - invalid, 1-valid 0
11 CO2 sensor function CO2 concentration 1500 800-2000
12 Humidity display 0 - invalid, 1-valid 0
13 Humidity sensor function humidity setting 70 50-100
14 IP address 1-66 1
15 Fan speed control 1=3 speeds(AC)
2=10 speeds (DC) 1
16
Touch Screen Controller Introduction

No. Contents Range Default Unit Record Position
16 DC type selection
0：150 air volume
1 : 250 air volume
2: 350 air volume
3: 200 air volume
4: 300 air volume
5: 400 air volume
6: 600 air volume
7: 800/1500 air volume
8: 1000/2000 air volume
9: 1300/2000 air volume
0
17 Filter alarm 0 useless
1 clear filter alarm, and recount time 0
18 Filter alarm set-
ting
0:45 days
1:60 days
2:90 days
3:180 days
0
19
Differential pres-
sure switch func-
tion
0 - invalid, 1-valid 0
20 Reserve
A. Description of Parameter Item 06, 07, 08 and 09 (Conventional defrosting)
Conventional defrosting: when the EA temperature lower than the setting defrost temperature (the pre-
set value is 1℃) and lasts for 1 minute, and it has been exceed the defrosting interval (the preset value
is 30 minutes), the supply fan will stop and exhaust fan run at high speed, until the EA temperature is
+15℃and lasts for 1 minute, or the defrosting has been lasting for a certain time (i.e. defrosting dura-
tion, whose preset value is 10 minutes), then the ventilator will turn back to the original operation
state.
B. Description of Parameter Item 10 and 11 (CO2 sensor function)
When the ventilator is in stand by condition or any speeds that are not the highest speed, if CO2 sen-
sor detects that the CO2 concentration is higher than the setting value for more than 5 seconds, the
ventilator will start up automatically and run at high speed. Only when the CO2 concentration is lower
than the setting value for more than 5 seconds. Ventilator will return to previous condition.
C. Description of Parameter Item 12 and 13 (Humidity sensor function)
When the ventilator is in stand by condition or any speeds that are not the highest speed, if humidity
sensor detects that the humidity concentration is higher than the setting value for more than 5 se-
conds, the ventilator will start up automatically and run at high speed. Only when the humidity concen-
tration is lower than the setting value for more than 5 seconds. Ventilator will return to previous condi-
tion.
17
Touch Screen Controller Introduction

6. Filter alarm, Parameter 18 to set the filter alarm time. When the operation time of the ventila-
tor exceeds the setting time, the filter icon will flashes to remind user clean the filter. After cleaning,
set Parameter 17 to be 1 to recount the time.
COMM COMM
Filter alarm On Filter alarm Off
7. Restore factory setting: In the power on state, press the buttons of “△” and “▽” simul-
taneously for more than 6 seconds to restore the product parameters to the factory default, ventilator
will turn off after restore to factory default.
8. Error code checking: under the main interface, press the SET button for short, user can check
the error code of ventilator, refer to below table. In fault display interface, press the buttons of “△”
and “▽”to exit.
No Error Error alarm
Code Error
E1 OA temperature sensor error
E2 Memory error
E3 RA temperature sensor error
E4 EA temperature sensor error
E5 communication error
E6 SA temperature sensor error
E7 Fire alarm error
18
Touch Screen Controller Introduction

Modbus Protocol
Baud rate 9600bps,
Even/Odd No,
Date bit 8,
Stop bit 1,
communication interval > 200ms.
Support function code: 0x03, 0x06
Register
address readable writable range of value function description remarks,
0(0x0000) √ √ 0-1 on-off state
0 - off 1 - on
1(0x0001) √ √ 1-10 Supply fan speed
2(0x0002) √ √ 1-10 Exhaust fan speed
3(0x0003) √ √ 15-30 Setting temperature
4(0x0004) √ 0-100 Humidity %
5(0x0005) √ 0-2000 CO2 ppm
6(0x0006) √ 0-120 Fresh air temperature Positive tempera-
ture,
When reading value
equal to or over 20,
then actual tempera-
ture is “reading tem-
perature minus 20”
Negative tempera-
ture,
When reading value
less than 20, then
actual temperature
is “20 minus reading
temperature”
7(0x0007) √ 0-120 Exhaust air temperature
8(0x0008) √ 0-120 Supply air temperature
9(0x0009) √ 0-120 Return air temperature
10
(0x000a) √ 0 --
11
(0x000b) √ 0-255
Bit0 fire alarm protection
Bit1 OA temperature sensor error
Bit2 EA temperature sensor error
Bit3 RA temperature sensor error
Bit4 SA temperature sensor error
Bit5 humidity sensor error
Bit6 CO2 sensor error
Bit7 filter alarm
19
Touch Screen Controller Introduction

12(0x000c) √ 0-1 Bypass switch, 1=on 0=off
13(0x000d) √ 0-1 P-heating state 1=on 0=off
14 √ 0-1 R-Heating state 1=on 0=off
15 √ 0 0
16 √ 0 0
17 √ 0 0
18 √ 0 0
19 √ 0 0
20 √ 0 0
21 √ 0 0
22 √ √ 0-23 System time: hour
23 √ √ 0-59 System time: minute
24 √ √ 1-7 System time: Week
25 √ √ 1-99 IP address
20
Touch Screen Controller Introduction