Jakka JRH72N Series User manual

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User’s Manual
for
JRH72N series

SEFETY
CONTROL LIST
COMPONENTS
DIMENSIONS
TECHNICAL SPECIFICATION
INSTALLATION
1
2
3
3
3
4-7
Contents
MAINTENANCE
TROUBLESHOOTING
8-10
11

1
Recuperator
SAFETY
•This product must not be disassembled under any circumstances. Only
authorized repair technicians are qualified to conduct disassembly and repairs.
•Failure to heed this warning may result in fire, electrical shock or injury.
•Do not install this product in a refrigerated warehouse, heated swimming pool or
other location where temperature and humidity are significantly different. (Failure
to heed this warning may result in electrical shock or malfunctioning.)
• Do not install this product where it will be directly exposed to rain.
(Failure to heed this warning may result in electrical shock or malfunctioning.)
•Do not install this product in a location where acid, alkali or organic solvent
vapors, paints or other toxic gases, gases containing corrosive components or
high concentrations of oily smoke are present. (Failure to heed this warning may
result not only in malfunctioning but also fire, power leakage and electrical shock.)
•Do not use this product outside the range of its rated voltage and control capacity.
JRH72N; Single phase, 220-240V, 50 Hz. (Failure to heed this warning may result in
fire or electrical shock.)
•Install this product in an environment where the temperature ranges from -10 °C
to +46 °C and the relative humidity is less than 80%. If condensation is expected
to form, heat up the fresh outside air by a duct heater etc.
• Select a position for introducing the outside air where no exhaust or combustion
gases will be sucked into the fresh air duct and where it will not be covered by
snow (Failure to ensure a supply of air can result in producing a state of Oxygen
deficiency inside the room.)
•Select an adequately sturdy position for installing the product and install it
properly and securely. (Injury may result if the product should fall.)
•Use the designated electrical wires for the terminal board connections and
connect the wires securely so that they will not be disconnected. (Failure to
ensure proper connections may result in fire.)
•When passing metal ducts through wooden buildings clad with metal laths, wire
laths or metal, these ducts must be installed in such a way that they will not
make electrical contact with metal laths, wire laths or metal sheets.
(Power leakage can cause ignition.)
• The outside ducts must be tilted at a gradient(1/30 or more) downwards toward
the outdoor area from the main unit, and properly insulated. (The entry of rain
water may cause power leaks, fire or damage to household property.)
•Gloves should be worn during installation.
(Failure to heed this warning may result in injury.)
•A dedicated circuit breaker must be installed at the origin of mains power supply.
This circuit breaker must be provided with a means for locking (lock and key).
•Connect the product properly to the ground. (Malfunctioning or power leaks can
cause electrical shock.)
•An isolator switch having a minimum contact gap of 3 mm in all poles
must be provided as a means of disconnecting the power supply.

2
CONTROL LIST
Recuperator
Control procedures required after commissioning and in case of
a malfunction are listed below. In the event of further malfunction
after initial controls, consult to our company.
NOTE
JRH72N 1500 / Air Flow Performance
01
02
03
04
05
06
07
08
09
10
Make sure the unit receives power and grounding is done!
Make sure the length of electric cables is correct!
(Check for overheating on cables!)
Check if the cables heading to the electrical box are shielded
(protected against magnetic field) and shield is grounded.
If not, replace!
Check if the exhaust and supply filters are clean and make sure they
do not prevent air flow!
Make sure the drain hose is connected and check for any blockages
through the drain line! If needed, clean it!
Please check that the duct dimensions used in the duct system are
correct and of the same dimension of the units duct connection. If
wrong correct it with appropriate one.
Make sure electrical connections are done as it is described in this
manual. Make necessary corrections if there is any faulty connection.
Make sure there is enough service space for installation.
If not, repeat installation.
In extremely cold climates in which freezing may occur on the heat
recovery unit, use electric pre-heater at the fresh air suction to raise
the air temperature to -8 °C or above.
Check for unusual noise or vibration after the installation. If there
is, control if anti-vibration pads are used.
√
JRH72N 1500 / Air Flow Performance

3
Recuperator
COMPONENTS
1 Heat Recovery Exchanger
2 Fresh air and Exhaust Air Fans
3 Fresh air and Exhaust Air Filters
4 Filter and Fan Service Cover
5 Electrical Box
6 Sub Hangers
7 Duct Connectors
8 Alternative Duct Connections
3
4
2
5
6
4
23
7
1
8
8
DIMENSIONS
C
D
F
G
E
A
B
TECHNICAL SPECIFICATION
Model A B C D E F G
800 660 1230 355 795 1312 200 200
1000 660 1230 355 795 1312 200 200
1500 910 1430 360 1045 1510 170 270
2000 910 1430 430 1045 1510 250 300
2500 1170 1790 425 1300 1870 300 300
3000 1170 1790 515 1300 1870 370 370
4000 1170 1890 515 1300 1970 370 370
5000 1380 1990 645 1455 2070 430 432
6000 1380 1990 645 1455 2070 430 432
800 1000 1500 2000 2500 3000 4000 5000 6000
Mains Connection
Working range
Air flow rate [m³/h] 800 1000 1450 1900 2400 2970 3730 4700 5700
Sound level [dB(A)] 44 45 46 48 49 50 52 53 59
Fan motor power [W] 390 624 790 1050 1050 1080 1300 1780 2540
Maximum current [A] 1,6 2,6 3,4 4,8 4,8 4,6 5,4 7,6 10,6
1~230 V 50 Hz
-12°C ~ 46°C and RH ≤80%
Performance date
Electrical data

4
INSTALLATION
Recuperator
CAUTION
•Do not install the unit, remote controller and cable within approximately 3 meters
from strong electromagnetic wave radiators.
WARNING
• Do not perform installation work and electrical wiring connection without referring to
the Installation and Operational Manual.
•Check that the ground wire is securely connected.
•Connect a fuse of specified capacity.
bolt (provided by user)
Duct
Elbow
(To prevent rain
water from
duct system)
entering into the
EA
(exhaust air
SA
(Supply
air)
RA
(Return
air)
OA
(outside air
Maintenance
cover
Fresh air
air
Mounting the Appliance
JRH72N series appliances can directly be mounted on a vibration-free solid wall with the
suspension parts supplied for installation purpose. The screws must be applied in a torque
enough to secure a rigid connection. The other part is mounted to the wall and used as a
hanger to fix the unit. Following aspects must be considered during mounting of the unit.
1 The appliance must be mounted level.
2 The installation space must be freezing free.
Checking Product Received
After receiving the product, inspect for any shipping damage. Claims for damage, either
apparent or concealed, should be files immediately with the shipping company.
Check for the model number and electrical properties like power supply, voltage and frequency
whether they fit your demand or not.
The installation and operation of the unit must be done as explained in this manual; the
utilization of the unit other than those indicated in these instructions is not recommended.
Please contact your local agent for any discrepancy.
Our liability shall not cover any defects arose from the alterations performed by a customer
without our written approval.

5
Recuperator
INSTALLATION
The duct connections in the unit are made of ABS material hence do not need
additional insulation. After connecting the unit; make sure that there is no leakage
between the duct connections of the unit and the duct. Use a duct tape where necessary.
Connecting the ducts
Fresh air grille
EA
(exhaust
air
outlet)
OA
(outside
air
intake)
Service area Exhaust
air
grille
Service space
SERVICE AREA
A
Model Dimensions
A (mm)
800 300
1000 300
1500 430
2000 430
2500 570
3000 570
4000 570
5000 650
6000 650

6
INSTALLATION
Recuperator
CAUTION
Air Inlet
Outside Air)
(Return Air or
Air Inlet
(Return Air or
Outside Air)
Air Outlet
Fresh Air)
(Exhaust Air or
Air Outlet
(Exhaust Air or
Fresh Air)
Alternative
Air Outlet
Alternative
Air Outlet
Air Inlet
(Return Air or
Outside Air)
Air Outlet
(Exhaust Air or
Fresh Air)
Air Inlet
(Return Air or
Outside Air)
Air Outlet
(Exhaust Air or
Fresh Air)
Alternate
Air Outlet
Alternate
Air Outlet
RIGHT HAND SIDE
INSTALLATION
LEFT HAND SIDE
INSTALLATION
Install the drain plug on the side of the fresh air

7
Recuperator
•Before connecting the ducts, check that no sawdust or any other foreign material
(scaps of paper, vinyl, building material etc.) exist in the ducts.
• Make sure service doors open easily and fan/ filter can be pulled out.
•Pay attention to the warnings before connecting the units to ducts.
INSTALLATION
CAUTION
Preparation of roof bolts
Hang the rubber anti-vibration pad to the bolt and balance the unit so that it remain
horizontally. Make sure the unit is attached securely with a lock nut.
Bolt (M10 or M12)
Anti-vibration pad
(vibration absorber)
Lock nut
Nut
Washer
CAUTION
Control the strength of the bolts before installation.
CAUTION
Do not install the ducts as shown on the following figures. Doing so will
increase the pressure drop, decrease the air volume from the unit and
give rise to abnormal sounds.
sharp bends
Extremely Multiple
Bends
Bends right next
to the outlet.
Sudden contraction and/or
expansions in duct diameter
The distribution ducts should be connected to the unit through rigid or semi flexible ducts
in order to avoid abnormal sounds and vibration. Flexible ducts may also be used ensuring
that the structure of the duct does not block the air stream and cause vibration. The unit is
equipped with pre-drilled duct flanges made of ABS for distribution duct connections.
1 Set the supplied ABS-made duct adapter to each duct connection to assure a good junction
of the ducts.
2 Fit the ducts securely into the duct connection flanges and wind Aluminum tape to prevent
air leakages.
3 Suspend the ducts from the ceiling so that their weight will not be applied to the unit.
4 The outdoor ducts must be covered with heat insulating material in order to prevent
forming of condensation.

8
MAINTENANCE
Recuperator
For best performance, clean up the air filters periodically. Best on every 3 operating
months, or at least once per year. Change filters after cleaning them 6 times, or earlier
if necessary
WARNING
• Disconnect all electric power, including remote disconnects before servicing.
Follow proper lockout / tagout procedures to ensure the equipment cannot be
inadvertently energized. Secure drive sheaves to ensure rotor cannot freewheel.
Failure to secure drive sheaves or disconnect power before servicing could result
in death or serious injury.
Filter Maintenance
WARNING
Do not start system without air filters properly installed and inspection doors screwed.
Otherwise, blockages in heat exchanger may occur.
HOW TO ACCESS FILTERS
STEP 1 To open the service door, remove out 4 screws on the service cover.
STEP 2 air filter will be visible.
STEP 3
With the opened service door, the filter service holes for fresh air filter(s) and return
this manual.
Remove the filter(s) as shown in the figure and do the maintenance as described in

9
Recuperator
MAINTENANCE
NOTE
•JAKKA Controllers for this units have a preset timer to monitor filter occupancy
according to factory set timer. Remote controller informs the user to check the
filters. After the filters are cleaned by the user, filter warning alarm must be reset.
Clean the filter with a vacuum cleaner. To remove dense dust build-ups, prepare
a solution with cold water and natural detergent or soap powder and submerge
the filter in the solution. Later pull out the filter from the solution and leave it to dry.
In any case, do not scrub or apply force on the filter material. After it is completely dry,
mount the filter to the unit, close the service door and tighten the screws thoroughly.
Filter
Vacuum Cleaner
NOTE
It may be handy to keep spare clean and dry filters for quick replacement of dirty filters
to minimize unit downtime for filter maintenance.
Exchanger Maintenance
For best performance, clean up the air exchanger periodically.
If the filters are maintained regularly, clean exchanger at least once in every two years.
HOW TO ACCESS EXCHANGER
STEP 1
To open the service cover that is located on the bottom side of unit, unscrew and
remove out 4 screws that secure the heat recovery exchanger service cover.
STEP 2
While performing removal of service cover make sure heat recovery exchanger
does not fall down.

10
MAINTENANCE
Recuperator
NOTE
Minimum mass of exchanger is 12 kg, and maximum mass of excjanger is 22 kg
Heat
recovery
exchanger
Clean with
hot water or steam
Clean the heat recovery exchanger with hot water or steam. Use natural
detergent or soap powder if need be. Leave it to dry after cleaning and
mount it to the unit after it is completely dry. Tighten the service cover
screws thoroughly and make sure the heat recovery exchanger does not
fall down.

11
Recuperator
TROUBLESHOOTING
FAULT REASON SOLUTION
a. Power supply off a. Turn on the power supply
b. No signal from the
control panel
b. Press the correct buttons of the
control panel
c. Incorrect or loose
electrical connection
c. Connect connections correctly
d. Motors in thermaprotection
mode
*e. No signal from the
frequency inverter
d. Check motor current
*e. Check the error code on the
frequency inverter’s screen
FANS RETURN
TO REVERSE
DIRECTION
a. Phase connection is
not correct a. Make the correct phase connection
a. Filters clogged or
dirty.
a. Change or clean filters
b. Air duct is clogged b. Check the air ducts
c. Channel connections
are incomplete
c. Check the duct system for leaks and
complete the connections
a. Channel connections
are incomplete.
a. Check the duct system for leaks and
complete the connections
b. Supply voltage is low
b. Measure the current drawn by the
motor against overloading
c. Grilles are not
mounted
c. Mount the grilles
d. Filters are not
mounted
d. Mount the filters
a. Drainage plugged a. Clean drain pipe
b. Incorrect installation
of drainage pipe.
b. Mount the drain pipe correctly
FANS DO NOT
WORK
LOW AIR FLOW
HIGH AIR FLOW
DRAINAGE
WATER
CAN NOT BE
DISCHARGED

Bulevar Zorana Đinđića 80,
11070 NOVI BEOGRAD
www.jakkagroup.com
[email protected]
[phone]
[phone]