System air HRU 1500 User manual

USER’S MANUAL
User's Manual
HRU 1500/2500/3500
New Zealand

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CONTENTS
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the HRU
1500/2500/3500 unit and all its modications.
Technical and maintenance staff must have theoretical and practical training in the eld of ventilation systems and should
be able to work in accordance with workplace safety rules as well as construction norms and standards applicable in the
territory of the country.
Safety requirements ....................................................................................................................3
Purpose..........................................................................................................................................5
Delivery set ...................................................................................................................................5
Designation key............................................................................................................................ 5
Technical data ...............................................................................................................................6
Unit design ....................................................................................................................................7
Mounting and set-up...................................................................................................................9
Wiring Diagram.......................................................................................................................... 10
Technical maintenance..............................................................................................................11
Storage and transportation regulations .................................................................................12
THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.

HRU 1500/2500/3500 User Manual 3
SAFETY REQUIREMENTS
• All user’s manual requirements as well as the provisions of all the applicable local and
national construction, electrical, and technical norms and standards must be observed
when installing and operating the unit.
• Disconnect the unit from the power supply prior to any connection, servicing, maintenance,
and repair operations.
• Only qualied electricians with a work permit for electrical units up to 1000 V are allowed
for installation and maintenance. The present user’s manual should be carefully read
before beginning works.
• Check the unit for any visible damage of the impeller, the casing, and the grille before
starting installation. The casing internals must be free of any foreign objects that can
damage the impeller blades.
• While mounting the unit, avoid compression of the casing! Deformation of the casing may
result in motor jam and excessive noise.
• Misuse of the unit and any unauthorised modications are not allowed.
• Do not expose the device to adverse atmospheric agents (rain, sun, etc.).
• Transported air must not contain any dust or other solid impurities, sticky substances,
or brous materials.
• Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
• Do not close or block the intake or extract vents in order to ensure the efcient air ow.
• Do not sit on the unit and do not put objects on it.
• The information in this user’s manual was correct at the time of the document’s
preparation.
• The Company reserves the right to modify the technical characteristics, design, or
conguration of its products at any time in order to incorporate the latest technological
developments.
• Never touch the unit with wet or damp hands.
• Never touch the unit when barefoot.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent,
or similarly qualied persons in order to avoid a safety hazard.
• Ensure that the appliance is switched off from the supply mains before removing
the guard.
• Precautions must be taken to avoid the back-ow of gases into the room from the open
ue of gas or other fuel-burning appliances.

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PURPOSE
DELIVERY SET
DESIGNATION KEY
Name Number
Air handling unit 1
User's manual 1
Technical data sheet 1
Wiring diagram 1
Automation system user’s manual 1
Packing box 1
The heat recovery air handling unit is designed for installation in centralized mechanical ventilation systems.
It is rated for continuous operation.
Transported air must not contain any ammable or explosive mixtures, evaporation of chemicals, sticky substances, brous
materials, coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic
substances, dust, pathogenic germs).
The corrosion resistance of the unit is class C4 according to ISO 12944.
HRU X P B EC RА**
Automation type
Service side
L – left
R – right
Motor type
EC – electronically commutated
Additional components
B – bypass
Spigot orientation
P - suspended mounting, horizontal spigot
orientation.
Rated air ow [m3/h]
Unit type

HRU 1500/2500/3500 User Manual 5
TECHNICAL DATA
OVERALL DIMENSIONS OF THE UNIT
A
B
A3 A4
A1
A1
A2 A2
Ø D
Ø D2
B1
B2
B3
Model AA1 A2 A3 A4 BB1 B2 B3 DD2
HRU 1500
600 676 713 1340 1610 350 520 1726 1700 9 16
HRU 2500
HRU 3500 1350 670 1960 1932
See the complete list of the technical data for the unit in the technical data sheet included in the delivery set.
The unit is designed for indoor or sheltered use. The installation conditions must prevent ingress of atmospheric
precipitations and direct solar radiation at the ambient temperatures from -35 °C up to +50 °C.
At sub-zero ambient temperatures, frost protection must be provided for the drainage and pipelines connected to the unit.
The heat medium temperature in water heaters (if available) must be sufcient to prevent its freezing.
Hazardous parts access and water ingress protection rating:
• IP54 for the motors
• IP40 for the assembled unit connected to the air ducts
• IP00 for the unit not connected to the air ducts
The unit design is constantly being improved, thus some models may be slightly different from those described in
this manual.

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UNIT DESIGN
1 1
4
5
6
7
8
2
4
3
1 – drain pipe
2 – supply fan
3 – extract lter
4 – heat exchanger
5 – extract fan
6 – bypass damper
7 – supply lter
8 – control unit
Service panels
Removable service panels are located on the unit casing for accessing the unit assemblies.
1
5 5 6
6
2 3 4
1 – panel for access to the lter (located on the service side)
2 – panel for access to the heat exchanger and the bypass damper (located on the service side)
3 – panel for access to the control unit and the terminal block (located on the service side)
4 – panel for access to the lter (located on the service side)
5 – panels for access to the fans (located at the bottom of the unit)
6 – panels for access to the lters (located at the bottom of the unit)
Panels 1-5 are xed with screws. Panels 6 are secured with thumbscrews.

HRU 1500/2500/3500 User Manual 7
Additional equipment
(purchased at the request of the customer)
HRU 1500 HRU 2500 HRU 3500
Control panel
А22
А22 WiFi
А25
Electric heater
HE 600x350-5.1-1 A21
HE 600x350-9.0-3 A21
HE 600x350-12.0-3 A21
DX cooler CDX 600х350-3
Water cooler CW 600х350-3
Water heater HW 600x350-2 A21
Air damper RRV P600x350
G4 lter SF 196x384x40 SF 253x603x48
Air damper actuator TF 230
Three position ball valve with an
electric actuator
Belimo R3020-4-B1+
LR24A-SR
Belimo R3020-
6P3-B1+ LR24A-SR
Liquid mixing kit for the water heater USVK 3/4-4 USVK 3/4-6
Differential pressure switch DTV 500
Flexible connector VVG AV 600x350
Silencer SR 600x350

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MOUNTING AND SET-UP
ALL OPERATIONS DESCRIBED IN THIS USER’S MANUAL MUST BE PERFORMED BY QUALIFIED
PERSONNEL ONLY, PROPERLY TRAINED AND QUALIFIED TO INSTALL AND MAINTAIN
VENTILATION EQUIPMENT.
DO NOT ATTEMPT TO INSTALL THE PRODUCT YOURSELF.
IT IS UNSAFE AND IMPOSSIBLE WITHOUT SPECIAL KNOWLEDGE.
The units are manufactured in left and right versions, i.e. they can be serviced from the right or left side. Choosing the
right arrangement can improve the ease of installation, shorten the length of the ducts and reduce the number of air
duct bends.
Left-handed modication (top view) Right-handed modication (top view)
Supply air
Exhaust air
Intake air
Extract air
Supply air
Exhaust air
Intake air Extract air
While mounting the unit provide enough access for maintenance or repair work. The minimum recommended clearances
between the unit and the adjoining walls are given in the gure below.
B
B
650
350
To attain the best performance of the unit and to minimise turbulence-induced air pressure losses, connect the straight air
duct section to the spigots on both sides of the unit while mounting.
Minimum straight air duct length:
• equal to 1 air duct diameter on the intake side
• equal to 3 air duct diameters on outlet side
If the air ducts are too short or not connected, protect the unit parts from ingress of foreign objects. To prevent
uncontrollable access to the fan, the spigots may be covered with a protecting grille or other protecting device with mesh
width not more than 12.5 mm.
Fasteners for fan mounting are not included in the delivery set and should be ordered separately.
While choosing fasteners consider the material of the mounting surface as well as the weigh of the unit.
Fasteners for installation should be selected by a qualied technician.
When installing the unit, it is necessary to ensure its slope of at least 3° towards the drainage pipes.

HRU 1500/2500/3500 User Manual 9
Recommended installation diagram
1
2
3
3
4
5
min 3°
1 – threaded rod
2 – nut
3 – washer
4 – vibration absorbing rubber
5 – nut and lock nut
Condensate drainage
The unit is equipped with drain spigots for condensate drainage outside the casing. U-traps must be connected to the
drain spigots.
The dimensions of the U-trap are selected depending on the pressure in the section, shown in the table.
H
h
Fan full pressure [Pa] Dimension H
[mm]
Dimension h
[mm]
<600 100 50
600-1000 140 70
1000-1400 190 95
1400-1800 240 120
1800-2200 290 145
2200-2600 340 170
Connect the spigot, U-trap and the sewage system with metal, plastic or rubber connecting pipes.
min 3°
1
2
3
2
4
1 – drain spigot
2 – connecting pipe
3 – U-trap
4 – sewage system
Make sure that the water ows into the sewage system before starting operation. Fill up the U-trap with water before
using it.

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WIRING DIAGRAM
HRU 1500-3000
L1
1
N
2
PE
3
X1
NC
1
C
2
NO
3
C
4
NO
5
C
6
GND
1
0-10V
2
24V
3 4
X2
GND 0-10V 10V
5 6
GND A B 24V
78910
NO
7
C
8
GND 0-10V
11 12
230V/2A
230V/2A
230V/2A 230V/2A
230V/1PH NKD
PK1 PK2 PK3
DESIGNATION NAME
CONTACT FROM FIRE PANELPK1 2X 0.75 NC 2A, 230V, AC
CABLE TYPE CONTACT TYPE SWITCH VOLTAGE
FIREPLACE MODE INPUTPK2 2X 0.75 NO 2A, 230V, AC
PK3 2X 0.75 NO 2A, 230V, AC
HEATER RELEASE OUTPUTNKD 2X 0.75 NO 2A, 230V, AC
BOOST MODE INPUT
X1
CO2 IN 10V IN NKD 10V CONTROL PANEL
DESIGNATION NAME
CO2 SENSOR 0-10VCO2 IN CAT ANALOGUE 0-10V, DC
CABLE TYPE SIGNAL TYPE SIGNAL VOLTAGE
EXTERNAL 0-10V10V IN
PANEL MODBUS 24V, DC
HEATER OUTPUT 0-10VNKD 10V
CONTROL PANEL CONNECTION
X2
ANALOGUE 0-10V, DC
ANALOGUE 0-10V, DC
CAT
CAT
CAT
HRU1500 - 3500
— ELECTRIC SHOCK HAZARD!

HRU 1500/2500/3500 User Manual 11
TECHNICAL MAINTENANCE
The unit operation requires regular inspection, dry cleaning of inner components, check-up and replacement of air lters in
case of lter clogging.
3-6 months after commissioning of the unit it must be inspected by a service expert for planned preventive maintenance
of the unit.
Subsequent maintenance should be carried out at least once every 6-12 months. The frequency of maintenance is
determined by the service technician, depending on the operating conditions of the unit. Dust deposits on the inner parts
of the unit, especially in the electric heater, may lead to unpleasant odours. This is not a malfunction. Clean the unit to
eliminate odours.
Access to lters through side service panels
Remove the service panels.
Unscrew the two thumbscrews securing the
retaining plate.
Remove the lter elements.
Access to lters through lower service panels
Remove the service panels. Remove the lter elements.
OPEN THE UNIT FOR INSPECTION AND SERVICE AT LEAST TWO MINUTES AFTER
COMPLETE DE-ENERGIZATION OF THE UNIT.
FANS MAY CONTINUE ROTATING.
IN CASE OF ANY ABNORMAL NOISE, SMELL AND COMPONENT DEFORMATION,
IMMEDIATELY CUT OFF POWER SUPPLY TO THE UNIT AND CONTACT A SERVICE
PROVIDER OR THE UNIT SELLER.

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Remove the service panel to access the heat exchanger. Remove the heat exchanger. Disconnect the connector from the
bypass damper actuator. Remove the bypass unit, then remove the second heat exchanger.
STORAGE AND TRANSPORTATION REGULATIONS
• Store the unit in the manufacturer’s original packaging box in a dry closed ventilated premise with temperature range
+5...+40 ˚С and relative humidity up to 70 %.
• Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and
sealing deformation.
• Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
• Follow the handling requirements applicable for the particular type of cargo.
• The unit can be carried in the original packaging by any mode of transport provided proper protection against
precipitation and mechanical damage. The unit must be transported only in the working position.
• Avoid sharp blows, scratches, or rough handling during loading and unloading.
• Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating
temperature for at least 3-4 hours.

HRU 1500/2500/3500 User Manual 13

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HRU 1500/2500/3500 User Manual 15

Systemair New Zealand Ltd
Ph 0800 100 326
[e-mail]
www.systemair.nz
Systemair NZ · April 2023 · SYSNZ10010