BROAD Clean Air SQ1000 User manual

2-YEAR WARRANTY
USER'S MANUAL
BROAD CLEAN FRESH AIR MACHINE
2022 11 En
SQ1000, SQ1500, SQ3000
Username:
400-883-9333

SAFETY INSTRUCTIONS
Contents
Controller Interface ……………………………………………………………01
Operation ………………………………………………………………………02
Information ………………………………………………………………………05
Product Composition …………………………………………………………06
Maintenance & Warranty ……………………………………………………09
Electrostatic Cleaner & Coarse Filter Cleaning ………………………10
HEPA Filter Replacement ………………………………………………………11
Troubleshooting of fresh air machine ………………………………………12
Optional air conditioning function …………………………………………13
Troubleshooting of A/C fan coil ……………………………………………14
Handling and installation ……………………………………………………15
Delivery scope and accessories list ………………………………………16
System installation example …………………………………………………17
Overall dimension drawing …………………………………………………18
After-sale service ………………………………………………………………20
1. Please read this manual carefully and retain for future use.
2. Make sure that the power voltage is consistent with the voltage indicated
in the label pasted on the machine.
3. The power cord shall comply with local standards. If it is damaged, it must
be repaired or replaced by the manufacturer or a qualified professional to
avoid electric shock.
4. The grounding wire shall well insulated.
5. When opening the machine door, do not press the safety switch with
hands or other objects to prevent electric shock and avoid scratching.
6. Clean the internal parts of the machine or cut off the power before
maintenance, and remove the baffle and protective cover for cleaning,
Water is not allowed inside.
7. Do not block the exhaust vent and air supply vents of the fresh air machine.
8. This product is not suitable for people with low physical function and
intelligence level (including children) to operate.
9. Do not dispose this product with ordinary garbage. Take it to a qualified
electrical waste station for recycling.

TO USERS
Dear Users,
Thank you for choosing BROAD Clean Fresh Air Machine.
Since its establishment, BROAD has been adhering to the service motto of
"Sincerity, Diligence and Strictness", and the philosophy of "Providing.
Unique Value for Customers". BROAD has been continuously improving our
service and our quality to ensure that all BROAD's clean fresh air systems provide
indoor air that is 100 times cleaner than outdoor air, and this commitment will
be fulfilled throughout the product’s lifespan.
In order to ensure the long-term stable operation of the product to create
a healthy and comfortable working and living environment, we have made
a Scope of Work for BROAD service engineers to follow. We appreciate your
support and supervision, and welcome your comments.
1. The engineer must make an appointment in advance with the user for on-site service.
If the engineer cannot keep the appointment for any reason, a call to the customer
should be made at least 15 minutes in advance.
2.The engineer must train the user on machine operation, and should demonstrate
electrostatic cleaner dust scraping and cleaning, as well as purification efficiency
testing during the first site service.
3.Air quality standard: The air from the fresh air outlet must be 1,000 times cleaner than
the outdoor air, and the indoor air must be 100 times cleaner than outdoor air (or up
to acceptance standard).
4.The engineer must conduct air detection after service. If not meeting the standard, a
written explanation and improvement recommendation should be made.
5.The working site must be cleaned after the service is finished.
6. All service work must be well recorded.
This manual serves as a maintenance guide book, which is of great significance
to the operation and management of the fresh air machine. Please keep it
handy.
Thank you again for your support. We appreciate your supervision and valuable
suggestions.

1
CONTROLLER INTERFACE
To turn on the Fresh Air Machine, press "On"
To turn off the Fresh Air Machine, press "Off"
Air Volume Frequency Adjustment press
Others: Press " " to return to the main interface (It will revert
automatically with no operation for 2 minutes. The same below)
Exhaust air
temperature
indoor
temperature
Fresh air
temperature
Fresh air
volume per
hour
Fan frequency
Outdoor
temperature
Freshness A.C.
1350
680
ppm
24.1
25.3 35.6
34.9 °
°
C
C
CO
2
45
Hz
m
3h
Power on: Press "All On", or enter the control interface of each
component to start up
Power off: Press "All Off", or enter the control interface of each
component to start down (only for linkage items)
Time
All On
On
All Off
Off
Fault
Fresh Air Unit
Help
Energy
Cosumption
Settings
A/C
09/11/2022 Saturday 11:45
Click here to set Self-controlled Freshness
Carbon
dioxide
concentration

2
OPERATION
• To get the energy
consumption data of
the current year, current
month and current day
• "Heat recovery" refers
to the heat recovery
efficiency of fresh air
• Press "Settings" in the
main interface to enter
the corresponding setting
interface
• Set up auto on / off, select
the linkage component,
correct the time, set up the
screen display time, and
calibrate the touch screen
Timer
Linkage selection
Date and time
ECO mode
Screen timeout selection
Touch calibration setting
Bypass valve setting
E&F air rate setting
Energy consumption
Energy consumption
Settings
Time
Time
This year
Last year
Real time
Today
Month
Heat
Heat
Fan
Fan
A/C
A/C
2.43
（55.10
% ）0.751 0
0
0496821
11.2718.26
kWh
kWh
kW
430711982 0
771421948
kWh
kWh
0

3
• Only one timing mode can be
selected each time (The black
dot in the center of the circle
indicates valid selection)
• Multiple time periods can be
selected for the on/ off timing
mode (The "√" in the box
indicates valid selection)
• Press the time in the box and
a numeric keypad will pop up.
Complete the time modification
• When setting the timing, the
Clean Fresh Air Machine icon
must be selected in the linkage
selection interface
Time mode
Everyday Once only
Working days (from Monday to Friday)
Everyday On~off time
Timing1
Timing2
Timing3
08:00 ～12:00
14:00 ～18:00
20:00 ～23:30
Confirm
Confirm
• The On/Off, All On, All Off, Timing
and other controlling systems
are only effective for those items
selected for linkage control
• The unselected items will not be
functioning simultaneously
• After the linkage items are
selected, go to the main
interface for "All On" or "All Off"
to run the machine
• Please go to the engineer
interface for linkage setting
Linkage selection
Broad clean fresh air machine
A/C coils
Humidifier
• The modification of date and
time value is the same as
"Timing"
• Only one language can be
selected each time (the black
dot in the center of the circle
indicates valid selection)
• "Engineer Password" is for service
engineers only
Date and time
Time
Date
Leaguage 中文
English
Engineer´s password
08:40
2022/11/09
* * * * * * OK
OPERATION

4
Confirm
Confirm
OPERATION
• Set up the screen display time
• Only one of the above times
can be selected each time
(the black dot in the center
of the circle indicates valid
selection)
• Press Confirm for confirmation
Screen timeout selection
10 Seconds
30 Seconds
60 Seconds
2 Hours
• The Fresh Air Machine will
automatically stand by on
auto-off mode and resume
operation immediately when
detecting people
• The postpone time can be set
as per actual need
• Press the time value to
enter the setting interface.
After entering the value,
press Confirm to save the
modification
Energy conservation mode
Shut down when no person
Shut down when no person around
h
8
• For touchscreen deviation
• If you do not want to continue
after entering the calibration
interface, press the "Back" key
• Press the prompt cursor "■" to
complete all operations and
save the parameters
Touch calibration setting
Touch the box

5
INFORMATION
• Press "Help" to enter this
interface
• "Brief Description" introduces
matters that need attention
during operation
• Press the left button to return,
press the right button for
troubleshooting query. See
page 12 for details
• Go to the page after "Brief
Description in the " Help"
interface
• Seek specific solution for
troubleshooting
• Press the left button to return,
press the right button for more
troubleshooting solutions(See
page 12 for details. For items
marked with *, please seek
immediate help from BROAD
or a BROAD authorized service
provider)
Troubleshooting
Phenomena
Big noise 1. Pan speed is
too high
2. Fan bearing or
rotor failuer
3. Wall or ground
is uneven
1. Lower fan frequency
2. Repair*
3. Fasten the bolts
or level the wall or
ground *
1.Close the door again
2.Replace it *
No blow
Causes Solutions
• If a fault occurs, the
"Fault" button on the main
interface will turn into a white
background automatically,
press "Reset" to clear the alert
• If the CO2concentration
exceeds the upper limit, please
immediately increase the air
volume of the fresh air machine
• If the electrostatic cleaner
cleaning prompt appears,
clean or replace as soon as
possible
• For fresh air machine
component failure, please seek
immediate help from BROAD
or a BROAD authorized service
provider
Fault
Reset
1. The door is not
properly closed
2. Fan motor failure
Fresh air machine Indoor air temperature probe fault
Brief description
1. The automatic freshness control refers to the control
of CO2concentration. When the CO2concentration
is too high, the air speed will increase automatically
to reduce the CO2concentration below the set
value. Vice Versa.
2. On the automatic freshness control mode, the fan
frequency rises and falls automatically to ensure the
freshness and comfort of the indoor environment,
while at the same time saving energy.

6
COMPONENTS
Human detection
sensor (optional)
Controller
Indoor CO2
sensor
HEPA Filter
Filters PM2.5 by 99.9%
(power efcient and
low noise design)
Fresh air blower
Electrostatic
cleaner
Filters small
particles by 98%
Exhaust air
blower
(power efcient and
low noise design)
Coarse lter
Filters big dust by 70%
Fresh air from
outdoors
Fresh air temp.
probe
T3
Outdoor air
temp. probe T4
T2
Exhaust air
temp. probe
C
T1
Indoor air
temp. probe
Clean fresh air outlet
To the bedrooms, living room and ofces
Exampled Mode: SQ1000
Air heat
exchanger
From the kitchen and toilet
Exhaust air inlet

7
COMPONENTS
Exampled Mode: SQ1500
T3
T4
T2
C
T1
Indoor
CO2
sensor
Fresh
air from
outdoors
Outdoor
air temp.
probe
Indoor
air temp.
probe
From the kitchen
and toilet
Exhaust air inlet Clean fresh air outlet
To the bedrooms
living room and ofces
HEPA Filter
Filters PM2.5 by
99.9%
Human detection
sensor (optional)
Fresh air temp.
probe
Controller
Electrostatic
cleaner
Filters small
particles by 98%
Air heat
exchanger
(power efcient and
low noise design)
Fresh air blower
Exhaust air
blower
(power efcient
and low noise
design)
Coarse lter
Filters big dust by 70%
Exhaust air
temp. probe

8
COMPONENTS
Exampled Mode: SQ3000
T3
T4
T2
C
T1
Indoor CO2
sensor
Fresh
air from
outdoors
Outdoor
air temp.
probe
Indoor air
temp. probe
From the kitchen
and toilet
Exhaust air inlet
Clean fresh air outlet
To the bedrooms
living room and ofces
HEPA Filter
Filters PM2.5 by
99.9%
Human
detection
sensor
(optional)
Fresh air
temp.
probe
Controller
Electrostatic
cleaner
Filters small
particles by 98%
Air heat
exchanger
(power
efcient
and low
noise
design)
Fresh
air
blower
Exhaust air
blower
(power
efcient and
low noise
design)
Coarse lter
Filters big dust
by 70%
Exhaust
air temp.
probe

9
Note: the ventilation function
will eteriorate if the HEPA filter
is plugged up
Filter Cleaning and
Replacement
MAINTENANCE & WARRANTY
1. Electrostatic cleaner cleaning
• Frequency: 1~3 months, depending on
dust thickness
2. Coarse filter cleaning
• Frequency: Every 1~3 months, depending
on dust thickness
3. HEPA replacement
• Frequency: Every 1~2 years, depending
on dust thickness
• Record the next replacement time on the
new HEPA filter
4. Air heat exchanger cleaning
• Frequency: Every 2~4 years
• Remove the exchanger, clean with
detergent and then rinse with clean
water (Air dry)
5. Internal component cleaning
• Frequency: Every 1~3 years
• Wipe the fan and the machine's inner
case with a wrung wet towel, be careful
Lifetime Service
BROAD provides optional lifetime service
for its clean air products, since the date of
purchase, free 2-year product warranty.
After the warranty expires, the user can
sign an annual maintenance agreement
with BROAD, who will provide various
value-added services such as cleaning,
maintenance, and testing. The service cost
is about 5% of the equipment price
Warranty
BROAD clean air products take "Best
Purification Effect", "Minimum Energy
Consumption", "Zero Downtime" and "40-
Year Lifespan" as its maintenance goals.
For cleaning and maintenance, please refer
to "Operation and Cleaning" posted on
the machine and the user manual for more
details. Each maintenance must strictly
follow the maintenance procedures and
record the steps in detail.
The maintenance work for commercial users
is suggested to be completed or supervised
by BROAD service engineers (or BROAD
authorized service providers).
Domestic users can perform maintenance
by themselves or entrust BROAD
Precautions
1. It is recommended to keep the fresh air
machine running at 30 ~ 40Hz, which can
be tuned higher when the number of
people increases. Do not run it at full load
if not necessary
2. Keep the doors and windows closed
tightly to ensure a slight positive pressure
indoor
3. Turn off the range hood and exhaust fan
immediately after cooking
4. Note that smoking and incense burning
will affect air quality
5. When there is no one in the room for a
long time, set an automatic 15-minute
running for every morning and evening to
ensure the basic cleanliness of the room

10
Open the door with machine key and
take out the dust remover
HEPA
Filter
Electrostatic
Cleaner
Coarse
Filter
Clean the electrostatic cleaner every 1~3 months. If the electrostatic cleaner has collected
over 1.5 mm of dust, it must be cleaned immediately
ELECTROSTATIC CLEANER CLEANING
Remove the electrostatic
cleaner
Cleaning Method: Detergent
Cleaning
1. Spray the detergent over the
electrostatic cleaner
2. Use the special brush to brush clean
the grille（Pay attention not to
scrape off the tungsten filament）
3. Rinse the electrostatic cleaner
with clean water (cool or warm)
Dry the water and dry it
completely (or sun dry)
and put it back
Clean the fan and the
inner case every1~3 years
Blow dry after cleaning
Fan Cleaning

11
Take out the old filter Load the new HEPA filter
The Coarse filter must be replaced every 1~3 months, the HEPA filter should be replaced every
1~2 years. If the indoor air quality is not up to standard, replace filter immediately
COARSE FILTER/HEPA FILTER REPLACEMENT
• The steps of loading a new filter are
opposite to those of taking out an old
filter
• Keep the arrow direction marked on the
filter same as before (as shown in the left
figure)
• Hold the new filter with both hands and
push it vertically and parallel
• Turn the knob clockwise to make the
pressure block press the HEPA filter (pay
attention to keeping the long side of the
pressure block press the HEPA filter)
• Write the next replacement date on the
identification strip of the new filter
• After the new filter is installed, the
dust concentration at the fresh air
inlet must be tested according to the
"Indoor Air Quality Checklist". If the dust
concentration of fresh air exceeds the
standard, check whether the filter is
damaged or firmly installed
Note: Please consult BROAD before
replacing the HEPA filter. You can replace
the filter by ordering from BROAD or call
400-883-9333 for on-site service
2. Turn the knob clockwise to
loosen the pressure block
(2 pressure blocks per filter)
3. Hold the HEPA filter evenly
with both hands, pull it out
1. Open the door
Knob
Pressure
block

12
No. Problem Cause Solution
1 The fan is
making noise
1.Fan speed is too high
2.The fan bearing or rotor
is faulty
3.The wall/floor surface is
uneven
1.Turn down the fan speed
2.Examine and repair *
3.Fasten the blots or smooth the wall/floor
surface
2 There is no
air coming
out from the
machine
1.The door is not closed
2.The fan is faulty
1.Close the door
2.Examine and repair *
3 The screen is
messy
Electrostatic interference Open the door once and then close it to
restore
4 The
electrostatic
cleaner does
not absorb dust
1.The tungsten filament is
broken
2.The electrode grid is
bent
3.Power failure
Repair or replace the electrostatic
cleaner *
5 Bad dust
absorption
performance
The electrostatic cleaner
or the power connection is
faulty*
Replace the electrostatic cleaner or
power supply*
6 electrostatic
cleaner，Poor
purification
effect
The dust collector is full of
dust
If the dust thickness of the dust collector
reaches 1.5mm, it
should be cleaned immediately
7 The
electrostatic
cleaner does
not fit
The electrostatic cleaner is
installed backward
Install in the direction of the arrow
8 The cleaning
prompt
appears
repeatedly
If the dust collector does
not suck much dust, but
the cleaning reminder is
too frequent
Reset the "cleaning cycle"
9 There is a
cracking sound
1.The electrostatic cleaner
is installed after washing
2.after running for a while
1.The electrostatic cleaner is not dried
thoroughly, remove it and blow dry
2.The electrostatic cleaner has collected
too much dust, clean it
10 The heat
exchange
effect is not
obvious
Small indoor and outdoor
temperature difference
This is a normal condition
11 The fresh air
volume is
insufficient
1. Wrong frequency setting
2. The air inlet/outlet is
blocked
3. The coarse filter has
collected too much
dust
4. The HEPA filter has
collected too much
dust
1. Reset
2. Clear the inlet/outlet immediately
3. Clean or replace the coarse filter
immediately
4. Replace the HEPA filter with a new one
TROUBLESHOOTING
Note: for items marked with *, seek help from BROAD or a
BROAD designated service provider immediately

13
OPTIONAL A/C FUNCTION
7.2
1.12 9.9 kWm3/h
14.8
A/C coils
2624
On Off
℃℃
℃℃
cooling mode
heating mode
electric water
valve
Indoor
temperature
A/C water
inlet
temperature
A/C water
outlet
temperature
Real-time
cooling (heating)
capacity
A/C water flow
Set temperature
Next page
Note: This interface is equipped with a heat meter
Turn on A/C Press "ON", the button will be highlighted
Turn off A/C Press "OFF", the button will be highlighted
Temperature adjustment Press or , adjustment range:
5～35℃
Others:Press " " to enter the A/C mode selection interface, as
follows
Cooling mode, heating mode, "auto switch" mode:The
system automatically switches cooling/heating modes according
to the water temperature of the A/C
On
Off
A/C functions
Confirm
Cooling
Heating
Auto switch
• "Cooling", "Heating" ，"Auto switch" only choose one
• Auto switch: the system automatically switches between
cooling and heating modes according to the water
temperature of the A/C (Turn on only once)
• Press "Confirm" to save changes

14
Note: For items marked with *, seek help from BROAD or a BROAD designated service
provider immediately
No. Problem Cause Solution
1Only air, no
cooling/
heating
1.When the room
temperature reaches
the set value, only the
fresh air function
2.A/C is not turned on
3.The A/C valve
(automatic valve) is stuck
1.This is a normal condition
2.Turn on the A/C (or outdoor unit)
3.Check the circuit or replace the A/C
valve*
2The cooling/
heating of the
air outlet is
obviously not
enough
1. The automatic exhaust
valve is blocked
2.The water filter is
clogged
1.Unscrew the exhaust valve, if there is
still no air, then close the two manual
valves and check the exhaust valve*
2.Close 2 manual valves, remove and
wash the water filter
3The room
temperature
cannot drop
down/rise up
1. The temperature setting
is wrong
2.The air volume is too
small
3.The water temperature
of the A/C is not low/high
enough
1.Reset
2.Increase the wind speed
3.Lower/increase the water
temperature of the A/C
4Condensation
nearby after
a period of
shutdown
The A/C valve cannot shut
off the water
check the circuit or replace the A/C
valve*
5The effect
of the A/C is
getting worse
1.The filter is too dirty
2.Coil vent valve blocked
3.The water filter is blocked
4.Other room pipe traffic
adjustment valve is too
large
1.Washed or replaced immediately
2.Open the exhaust valve, if still no air,
turn off 2 manual valves and repair
the exhaust valve *
3.Turn off 2 manual valves, remove and
wash water filter
4.Turn down flow control valves on coils
in other rooms
6Water stains
outside the A/C
pipeline
1.The pipeline insulation
is not strict, resulting in
condensation
2.Cracks and leaks in the
pipeline
1. Re-insulation, ensure no gaps at the
interface, and the insulation material
should be airtight (rubber and plastic
materials)*
2.Check pipes and repair*
A/C COIL TROUBLESHOOTING

15
HANDLING AND INSTALLATION
1. Preliminary preparation
• The unit is better to be installed in the
machine room or indoors, sunshade and
rainproof measures are required for outdoor
installation
• The materials are complete without
damage, the tools are safe and reliable
• Prepare a film to avoid dust pollution in the
room
2.Open fresh air hole/exhaust air hole
• Holes opening should be kept away from
beams and load-bearing walls, and the
outer hole of the wall should be slightly lower
than the inner hole by 5~10mm to prevent
rainwater from flooding into the room
• The fresh air duct and exhaust air duct must
be firm and must be installed on the same
day (air duct are prepare by users)
3. Machine and component installation
• Use the bolts or plastic foot pads to raise the
four corners of the SQ unit, adjust the level,
and the inclination does not exceed 2°, so
that the unit is lifted off the ground
• It is conducive to indoor air circulation,
and all air outlets cannot be blocked by
obstacles
• The condensate pipe should be sloped to
ensure smooth discharge of condensate
• There is enough maintenance space around
(1.5 meters above, the door can be opened
back and forth)
4.Fresh air / exhaust air pipe installation
• Try to lay along the wall without damaging
the decoration
• There should not be too many elbows,
and try to avoid sharp bends and abrupt
changes in order to reduce wind pressure
loss along the way
• The bracket hanger is more than 200mm
away from the joint of the pipe mouth,
and the joint of the air pipe is sealed with a
rubber strip
• The air duct in the machine room shall be
installed after the unit and components are
installed, and all fresh air ducts (including
branch pipes) should be insulated
Test run
• After installation, check the controller
settings according to the "Operation"
guidance stipulated in this manual
• Focus on the particle purification effect,
temperature and carbon dioxide
concentration
• Take out the electrostatic cleaner for
inspection after one day of operation.
If the cleaner collected no dust, there
must be a fault. Please inform BROAD
immediately
Preliminary preparation
Determine the installation location
of the unit and air duct installation
line according to the design, put the
sample (scratch), prepare tools and
accessories, and prefabricate ducts
as required
Open fresh air hole/exhaust air hole
Open fresh air / exhaust holes and
unit fixing bolt holes according to the
installation dimension drawing
Unit and component installation
Move the unit in place, adjust the
4 M16 bolts at the bottom of the
machine (SQ1000 is a plastic foot pad)
to raise the unit horizontally, and install
HEPA filters and A/C coils (optional)
Duct installation
Drill holes to install brackets and
hangers, open holes in the wall and
ceiling where the air duct passes,
install the air duct, connect with the
unit, and install the air nozzle
Power supply, signal line connection
Connect the power cord to the indoor
electrical box or electric control
cabinet, pay attention to the forward
and reverse directions of the fan
Voltage：~220V 50Hz
installation process
Handling
• The lower part of SQ1500 and SQ3000
unit has steering casters, which can be
pushed slowly on the flat ground
• If the channel size is limited, SQ3000
can be moved in separately and then
assembled
• Before handling, the forklift must be
carefully inspected in accordance with
professional requirements to prevent
safety accidents, and must not be moved
recklessly to avoid irreparable losses
Precautions

16
No .Item Content Broad Customer Description
1Transportation From the factory to
the construction site
√BROAD can handle the
transportation as an agent
Transport equipment
in place
√BROAD provides guidance
2Installation of
equipment
pipelines
On-site assembly of
split units
√Charge 8% of the standard
price of equipment
A/C water pipes
to the side of the
equipment
√Water supply, return water,
and condensation water pipes
Fresh air outlet/
exhaust air outlet
(optional)
√Air outlet rain cover
Fresh air/exhaust air
main duct
√/
3Electrical
installation
Power supply to
the side of the
equipment
√~220V 50Hz
Building automation
connection
√RS485 interface, BROAD
protocol
Grounding wire
to the side of the
equipment
√Grounding resistance≤4Ω
Human body sensor
installation (optional)
√Installed in places where there
are always people (Automatic
start and stop by human body
sensor)
4Commissioning Cleanliness and other
inspections
√According to BROAD
standards
5Operation and
maintenance
User operator training √4~10人On-site training, user
assigns 4~10 people
Cleaning and
replacement of lters
√After 2 years of warranty, an
annual service agreement can
be signed with BROAD
DELIVEERY SCOPE AND ACCESSORIES LIST
Delivery scope
Model SQ1000 SQ1500 SQ3000
Sealant strip 1piece 1piece 1piece
Key 1piece 1piece 1piece
Dust collector special brush 6pieces 6pieces 9pieces
Bolts(M6) //4pieces
Parts Liast

17
SYSTEM INSTALLATION EXAMPLE
• This page takes the SQ3000 model as an example
• Installation type: oor installation, connected to the air duct
• The distance between the air inlet and the air outlet should be as far as possible, so
that the room area covered by the fresh air can be larger and more energy-saving
• If the height of the machine room is limited, the side air supply connection method
can be adopted (the HEPA lter and the coil are installed on the side of the
equipment)
• The room should be airtight and fully ventilated by fresh air machine
• Fresh air and exhaust air pipes must prevent rainwater from inltrating
Fresh air duct
A/C coil (optional)
Indoor Outdoor
Exhaust air
connector
Fresh air
connector
Exhaust air duct
Special Note: