Juwent OptiMax-10, OptiMax-30, OptiMax Series, OptiMax-40, OpitMax-20 Original Instruction Manual

Szymański, Nowakowski General Partnership

31 Lubelska Str., 08-500 Ryki

phone [phone], fax [phone]

OPTIMAX

COMPACT AIR HANDLING UNIT

I. CONTACTS
II. ORIGINAL INSTRUCTION MANUAL
III. SAMPLE EC DECLARATION OF CONFORMITY
IV. WARRANTY TERMS
V. DEVICE COMMISSIONING REPORT
VI. INSPECTION AND MAINTENANCE CHART
VII. SERVICE REQUEST
VIII. ADDITIONAL DOCUMENTS

» » Technical Data Sheet
» » Declaration of Conformity
» » List of Components Installed in the Device;
» » Specication of Automatic Equipment Components;
» » List of Elements Attached to the Unit;

POLAND

Please read this instruction manual carefully before beginning any work.

RYKI 2016

ISSUE 1 EN

I. CONTACTS

Szymański, Nowakowski General Partnership

phone [phone], fax [phone]

31 Lubelska Str., 08-500 Ryki

POLAND

Export department

mob.[phone]
mob.[phone]

[e-mail]

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II. ORIGINAL INSTRUCTION MANUAL

OPTIMAX

COMPACT AIR HANDLING UNIT

in sizes 10÷50

AIR HANDLING UNITS ARE MADE IN ACCORDANCE WITH EN 1886 AND EN 13053.

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1. INTRODUCTION 5

TABLE OF CONTENTS

2. INTENDED USE 5

3. DESIGNATION 5

4. SERVICE SIDE 6

5. WORKING PARAMETERS 6

6. WORKING CONDITIONS 6

7. UNIT VERSION 7

8. DESIGN 7

8.1. BASE SECTION 7

8.2. WATER HEATING COIL SECTION 8

8.3. WATER HEATING COIL AND WATER OR FREON COOLING COIL SECTION 9

8.4. SILENCER SECTION 10

8.5. OPTIONAL COMPONENTS 10

9. TECHNICAL DATA 11

9.1. AIR CAPACITY RANGE 11

9.2. DIMENSIONS AND WEIGHTS 12

10. HANDLING AND STORAGE 14

11. SETTING, ASSEMBLY, CONNECTION OF RELATED SYSTEMS 15

11.1. SETTING 15

11.2. SETTING LOCATION 15

11.3. CONNECTING SECTIONS 16

11.4. CONNECTING VENTILATION DUCTS 16

11.5. CONDENSATE DRAINAGE 17

11.6. CONNECTING HEATING AND COOLING COILS 18

11.7. ELECTRICAL CONNECTION 19

12. AUTOMATIC EQUIPMENT 21

12.1. AUTOMATIC EQUIPMENT COMPONENTS 22

13. PREPARING FOR START-UP 26

13.1. WIRING SYSTEM 26

13.2. FILTERS 26

13.3. WATER HEATING COIL 27

13.4. WATER COOLING COIL 27

13.5. FREON EVAPORATION COIL 27

13.6. ROTARY HEAT EXCHANGER 27

13.7. FAN UNIT 27

14. START-UP AND ADJUSTMENT 28

14.1. MEASURING AIR QUANTITY AND ADJUSTING EFFICIENCY OF THE UNITS 29

14.2. ADJUSTING WATER HEATING COIL 29

14.3. ADJUSTING WATER COOLING COIL 29

14.4. ADJUSTING FREON EVAPORATION COIL 30

15. USE AND MAINTENANCE 30

15.1. AIR DAMPERS 31

15.2. FILTERS 31

15.3. WATER HEATING COIL 32

15.4. WATER COOLING COIL 32

15.5. FREON EVAPORATION COIL 33

15.6. ROTARY HEAT EXCHANGER 33

15.7. SILENCING SECTION 33

15.8. FAN UNIT 34

15.9. FANS 34

15.10. FANS MOTORS 34

16. CONTROL MEASUREMENTS 35

17. DISPOSAL 35

18. OHS INSTRUCTIONS 35

19. INFORMATION 35

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1. INTRODUCTION

To ensure correct and safe operation of the device thoroughly learn the contents of the herein
documentation, assembly and use of the units in accordance with the descriptions herein and

respect all safety conditions.

Works related to unloading of pallets with components of the unit, handling of pallets, elements and
unit blocks, connecting the systems within the unit, as well as maintenance must be performed by
qualied personnel or supervised by authorized personnel.
The qualied personnel shall be considered people, who in respect of the completed training, working
experience and knowledge of essential standards, documents and regulations on occupational
safety and working conditions have been authorized to perform the necessary works and are able to
recognize and avoid potential hazards.

Assembly of the unit, connection of the related systems, commissioning, use and
maintenance must be conducted in accordance with relevant directives and regulations
valid in a country of the device installation.

It is recommended to use services of JUWENT Authorized Service Points when installing,
commissioning, performing post-warranty repairs, inspections and maintenance of the

devices.

Make sure that the documentation is always placed nearby the device and is easily
accessible to the Service personnel.

2. INTENDED USE

Air handling units are designed for use in ventilation and air conditioning systems, both in public
utility and residential as well as industrial buildings. The applied sub-assemblies enable:

» ltering of the fresh air and the air being exhausted from the handled rooms;
» all year long energy recovery which allows for fresh air pre-heating in winter, and fresh air

pre-cooling in summer;

» heating of ventilation air in heating season;
» cooling of ventilation air in summer;
» silencing of noises generated by operating fan assemblies.

3. DESIGNATION

Compact air handling unit OptiMax

Unit size

10, 20, 30, 40, 50

Service side

P – right, L – left

Version

W - indoor
ZK - 4 exible connectors, ZC - 3 exible connectors + air intake cowl
ZW - 3 exible connectors + air exhaust cowl
ZV - 2 exible connectors +air exhaust cowl + air intake cowl

Motor type

AC - asynchronous, EC - electronically commutated

Silencers

TZ - at external air side, TW - at internal air side,
TW - TZ silencers at external and internal air side

Additional sections

NLW – water heating coil, NLWCLW - water heating coil + water cooling coil,
NLWCF - water heating coil + freon evaporation coil

50- P-W -EC/ TZ-TW - NLWCLW

-

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4. SERVICE SIDE

LEFT SERVICE SIDE RIGHT SERVICE SIDE

5. WORKING PARAMETERS

Casing parameters conform to EN 1886:2008:

» heat inltration coefcient - class T3
» heating bridges inuence coefcient - class TB1
» mechanical strength of the casing - class D2
» leak tightness - class L2

Working parameters of n water heating coil:

» min. temperature of supply medium 30°C
» max. temperature of supply medium 110°C
» max. working pressure 1.5MPa

Working parameters of n water cooling coil:

» min. temperature of supply medium 1°C
» max. temperature of supply medium 16°C
» max. working pressure 1.5MPa

Temperatures of air being transferred:

» min. temperature of air being transferred -35°C
» max. temperature of air being transferred +35°C

Ambient temperature:

» min. ambient temperature -35°C
» max. ambient temperature +50°C

6. WORKING CONDITIONS

The units must not be used when:

» the air being transferred may contain solid, pasty, bre and aggressive substances

causing corrosion or decomposition of zinc, copper, steel and aluminium;

» temperature and humidity values for external air in summer or winter are outside

limits determined for Europe;

» operation in maritime or tropical climate is expected;
» the air is excessively dusted and involves very often replacement of air lters within

the unit;

» power supply of water heating coil is unreliable for a long period of time that even
operable automatic equipment would not protect the exchangers against freezing
and possible resulting losses (damage to the heating coil, damages due to room
ooding).

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7. UNIT VERSION

Individual elements of the unit are made of the following materials:

» external side panels, oor panels, feet – galvanized sheet DX51D,
» external side panel – aluzinc type sheet DX51D+AZ185-A-SE,
» drip trays – stainless steel X5CrNi18-10 (1.4301),
» casing structure - aluminium,
» blades of the air dampers – aluminium,
» lling of rotary heat exchanger – aluminium,
» heating, cooling coil ns – aluminium,
» heating, cooling coil tubes and collectors - copper,
» all the slots on the contact with casing elements are lled with silicone,
» door panels seals are made of EPDM,
» drainage of condensate protected against drawback with siphons,
» surfaces of removable splitters of silencers resistant to abrasion,
» ne lters, at least F5 class,
» very ne lters - F7 class,
» fans with direct drive.

8. DESIGN

Series of types includes 5 sizes of units (10, 20, 30, 40, 50) within the capacity from 500 up to
18,000 m3/h. Series of types includes:

» base section;
» water heating coil section;
» common water heating and water cooling coil section;
» common water heating and freon evaporation coil section;
» silencing section.

Due to their design and materials used, the units do not emit non-ionising radiation.

8.1. BASE SECTION

The section has been designed as air-supply and exhaust type in double-deck conguration. The
section comprises: casing, dampers, lters, fans, rotary heat exchanger, condensate tray.

8.1.1. Casing

Casing construction bases on the spacious frame made of aluminium prole. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
there is hinged inspection door closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double seals.
To keep tightness between base section and other sections, air supply inlets and outlets have
insulation on their circuits. Additionally, in corners of the casings at air supply inlet and outlet sides
steel section connectors with oblong holes are tted. When connecting sections, this solution
enables to level any slight unevenness in surface for setting the unit both vertically, and horizontally.
To ensure the units are set properly on the ground, in casings of base sections in 10, 20, 30 sizes,
load-bearing feet are provided. In other sizes the casing is equipped with load-bearing base with
handles for vertical transportation, made from galvanized steel section.

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8.1.2. Air dampers

Base sections are equipped with 2 multi-plane dampers with seals. They are mounted inside the
casing. One is located at the fresh air inlet side, and the other at the inlet of the air being exhausted
from rooms. Thanks to such solutions damper actuators are also located inside the casing, and
protected against the precipitation.

8.1.3. Filters

Base sections are equipped with ne M5 panel lters at the air supply side and the removed air side,
and with very ne F7 bag lters at the air supply side. Between each lter section and along guides,
special seals are applied. Number of lter sections and their size depends on the unit size.

8.1.4. Fans

In base sections centrifugal fan with direct drive powered by AC or EC 3x400V motors have been
used. Depending on unit size, a total of 2 or 4 fans are used. Rotors in all unit sizes, except 10, are

made of plastic.

8.1.5. Rotary heat exchanger

In base sections, high-efciency condensing rotary heat exchangers are applied. In order to minimize
air leaks between air supply and exhaust parts, exible circumferential seal and horizontal brush seal
have been applied. The rotor is driven by a belt transmission with 3~230V/50Hz powered motor with
cylindrical gearmotor.

8.1.6. Condensate tray

Under the rotary heat exchanger rotor, in the casing oor a tray made of stainless steel has been used
to collect condensate with condensate drains, provided outside the casing. On the tray perimeter,
between the tray and the casing silicone seals are tted.

8.2. WATER HEATING COIL SECTION

The section has been designed as air-supply type in single-deck conguration. The section comprises:
casing, n water heating coil.

8.2.1. Casing

Casing construction bases on the spacious frame made of aluminium prole. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
inspection door is mounted; it is closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double gaskets.
To keep tightness between the connected sections, air supply inlets and outlets have insulation on
their circuits. Additionally, in corners of the casing at air supply inlet and outlet sides, steel section
connectors with oblong holes are tted. When connecting sections, this solution enables to level any
slight unevenness in surface for setting the unit both vertically, and horizontally.
In order to ensure proper setting of the section on the ground, the casing, in all sizes, is equipped
with load-bearing feet.

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8.2.2. Heating coil

Fin heat exchanger made of copper and aluminium is tted. It is supplied with heating medium as
water or water with ethylene or propylene glycol. The heat exchanger is accessible from the unit’s
service side. While the heating medium connectors are provided at the opposite side, on back of
the casing. Such solution allows the exchanger to be accessed freely from the service side. Thanks to
this removal of the exchanger, e.g. for cleaning or periodical maintenance does not require removal
of this part of the system that is mounted directly by the unit. It is only necessary to empty the heat
exchanger and unscrew unions on the exchanger connections and push out the exchanger from the
casing onto the service side.

8.3. WATER HEATING COIL AND WATER OR FREON COOLING COIL SECTION

The section has been designed as air-supply type in single-deck conguration. The section comprises:
casing, n water heating coil, n water cooling coil or freon evaporation coil, droplet eliminator, tray.

8.3.1. Casing

Casing construction bases on the spacious frame made of aluminium prole. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
there is hinged inspection door closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double gaskets.
To keep tightness between the connected sections, air supply inlets and outlets have insulation on
their circuits. Additionally, in corners of the casing at air supply inlet and outlet sides, steel section
connectors with oblong holes are tted. When connecting sections, this solution enables to level any
slight unevenness in surface for setting the unit both vertically, and horizontally.
In order to ensure proper setting of the section on the ground, the casing, in all sizes, is equipped
with load-bearing feet.

8.3.2. Water heating coil

Heat exchanger made of copper and aluminium is tted. It is supplied with heating medium as
water or water with ethylene or propylene glycol. The heat exchanger is accessible from the unit’s
service side. While the heating medium connectors are provided at the opposite side, on back of
the casing. Such solution allows the exchanger to be accessed freely from the service side. Thanks to
this removal of the exchanger, e.g. for cleaning or periodical maintenance does not require removal
of this part of the system that is mounted directly by the unit. It is only necessary to empty the heat
exchanger and unscrew unions on the exchanger connections and push out the exchanger from the
casing onto the service side.

8.3.3. Water cooling / freon evaporation coil

Heat exchanger made of copper and aluminium is tted. It is supplied with chilled water with
ethylene or propylene glycol or, freon. Heat exchangers are accessible from the unit’s service side.
While the chilled water connectors are provided at the opposite side, on back of the casing. Such
solution allows the exchanger to be accessed freely from the service side. Thanks to this removal of
the exchanger, e.g. for cleaning or periodical maintenance does not require removal of this part of
the system that is mounted directly by the unit. It is only necessary to empty the heat exchanger and
unscrew unions on the exchanger connections and push out the exchanger from the casing onto

the service side.

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8.3.4. Condensate tray

Under the cooling coil, in the casing oor a tray made of stainless steel sheet has been used to collect
condensate with condensate drains, provided outside the casing. On the tray perimeter, between
the tray and the casing silicone seals are tted. The tray is tted with guides, where the cooling coil
is mounted. This enables use of the whole volume, owing to which condensate is drained efciently
out of the section.

8.3.5. Droplet eliminator

Droplet eliminator comprises panels made of plastics. Labyrinth-type system to trap the air-entrained
water molecules provides efcient operation even up to 4 m/s. After opening the inspection door it
can be removed freely for maintenance or cleaning.

8.4. SILENCER SECTION

The section has been designed as air-supply and exhaust type in double-deck conguration. The
section comprises: casing, removable splitters.

8.4.1. Casing

Casing construction bases on the spacious frame made of aluminium prole. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
there is hinged inspection door closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double seals.
To keep tightness between the connected sections, air supply inlets and outlets have insulation on
their circuits. Additionally, in corners of the casing at air supply inlet and outlet sides, steel section
connectors with oblong holes are tted. When connecting sections, this solution enables to level
freely any slight surface unevenness of setting both vertically, and horizontally.
In order to ensure proper setting of the section on the ground, the casing, in all sizes, is equipped
with load-bearing feet.

8.4.2. Removable splitters

Removable splitters of 100 mm in thickness are tted. They are made of mineral wool and covered
with thin cloth “veil” type in order to eliminate inltration of mineral wool parts to the air. Removable
splitters are designed to be tted horizontally and can be removed by pushing them out down the
guides. This solution enables access to the section for easy cleaning, and connection of the silencer
section to other sections at the inner side of the casing.

8.5. OPTIONAL COMPONENTS

8.5.1. Flexible connector

Designed for connecting the unit to a duct system exibly so that possible unit vibrations are
not transferred onto ventilation ducts. Comprising strong fabric and mounting frames facilitating
connection to duct anges.

8.5.2. Air intake cowl

Designed for units in external version. Specially shaped drip with trays on the perimeter protect
the unit inlet against direct penetration of precipitation, e.g. snow or rain. Additionally, inside the
air intake cowl a droplet eliminator is built-in to provide protection of the units against possible
entrainment of rain drops or light snowakes. Air intake cowl inlet has an inlet grille protecting the
units against, e.g. birds.

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8.5.3. Air exhaust cowl

Designed for units in external version. Fitted with special ns forcing the labyrinth ow of the air
being exhausted. The air exhaust cowl inlet has an inlet meshing protecting the units against, e.g.
birds.

8.5.4. Roof

An additional component for the units in external version is a specially shaped sheet protecting the
unit roof against water penetration, e.g. due to melting of the snow collected on the roof. Moreover,
at the service side the extended drip protects inspection panels against water draining from the roof.

9. TECHNICAL DATA

9.1. AIR CAPACITY RANGE

UNIT SIZE

AIR FLOW [m3/h]

Size Vmin [m3/h] Vmax[m3/h]

OptiMax-10 500 2000

OpitMax-20 1500 5000

OptiMax-30 3000 8000

OptiMax-40 6000 13000

OptiMax-50 10000 18000

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9.2. DIMENSIONS AND WEIGHTS

9.2.1. Base section

Size

OptiMax-10 900 800 300 800 700 1600 230

OpitMax-20 1200 1100 450 1100 1000 2000 413

OptiMax-30 1500 1400 600 1400 1300 2000 631

OptiMax-40 1870 1750 750 1750 1650 2200 931

OptiMax-50 2170 2050 900 2050 1950 2400 1236

Hc

[mm]H[mm]Hw[mm]B[mm]Bw[mm]L[mm]

9.2.2. Heating coil section

Size

OptiMax-10 500 400 300 800 23

OpitMax-20 650 550 300 1100 35

OptiMax-30 800 700 300 1400 49

OptiMax-40 970 850 300 1750 65

OptiMax-50 1120 1000 300 2050 79

Hc

[mm]

H

[mm]

L

[mm]

B

[mm]

*In weights given, cooling / heating media are not included.

Weight ±10%

[kg]

* Weight ±10%

[kg]

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9.2.3. Water heating and water cooling or freon evaporation coil section

Size

OptiMax-10 500 400 750 800 65

OpitMax-20 650 550 750 1100 114

OptiMax-30 800 700 750 1400 164

OptiMax-40 970 850 750 1750 224

OptiMax-50 1120 1000 750 2050 282

Hc

[mm]

H

[mm]

L

[mm]

B

[mm]

*In weights given, cooling / heating media are not included

9.2.4. Silencing section

* Weight ±10%

[kg]

Size

OptiMax-10 900 800 800 750 82

OpitMax-20 1200 1100 1100 750 133

OptiMax-30 1500 1400 1400 750 198

OptiMax-40 1870 1750 1750 750 300

OptiMax-50 2170 2050 2050 750 393

Hc

[mm]

H

[mm]

B

[mm]

L

[mm]

Weight ±10%

[kg]

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9.2.5. Flexible connector

Size

OptiMax-10 300 700 3

OpitMax-20 450 1000 4

OptiMax-30 600 1300 5

OptiMax-40 750 1650 6

OptiMax-50 900 1950 7

10. HANDLING AND STORAGE

Air handling unit is delivered in sections. The delivered units become a Customer’s
property once the packing list has been signed by the Customer’s representative.

Immediately after the reception of the devices, check the condition of the packaging
and whether the delivery is complete on the basis of the attached specications and
packing lists.

Unloading of the unit section after their delivery or their transportation to the site must
be carried out with a specialized equipment by properly trained personnel.

The unit section must be stored on a hardened, dry area under a roof. A hardened area
should be considered at, horizontal, hard surface the properties of which shall remain
unchanged under the weather conditions.

Unit sections should be stored away from areas where machine trafc (vehicles, lifts and
other construction machinery) is present, in a place where they are not exposed to
mechanical damages, moisture, aggressive chemical agents, dusts, sands and other
external factors which may affect the condition of the units and components stored.

Hw

[mm]

Bw

[mm]

Weight ±10%

[kg]

Unloading of sections from means of transport and their handling to the site should be
carried out with a forklift truck or a lift.

Unit sections should be transported only in position of their normal operation, and must
not be stacked when stored.

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During the storage period the foil must be unsealed.

Any damages resulting from improper handling in the facility, unloading and storage

are not covered by the warranty, and any claims in this respect shall not be considered.

Sections of the unit should be stored in rooms, where:

-relative humidity;

-ambient temperature -40°C < t < +60°C

-o prevent the devices against exposure to dusts, caustic gases and vapours, and
other chemical agents causing corrosion to the equipment and structural elements

of the device.

11. SETTING, ASSEMBLY, CONNECTION OF RELATED SYSTEMS

11.1. SETTING

The unit should be set on:

» » foundation screed,
» » steel foundation framework embedded in the oor,
» » specially prepared rigid steel structure,

Foundation, framework or steel structure must be at and level to ensure that stability is kept
throughout the entire period of use and be of sufcient strength adequate to the weight of the unit.

11.2. SETTING LOCATION

The unit should be set so as connections of the related systems (ventilating ducts, pipeworks, cable
routing) create no collision with inspection panels. In order to have an efcient assembly, use and
service of the units, keep a minimum distance equalling at least to the unit width between the service
panel and the structural elements (walls, supports, pipeworks, etc.) existing in the assembly site. For
sections equipped with heating coil or heating and cooling coil, keep min. 50cm distance between
the back of the unit and any xed structural elements on the site (walls, supports, pipeworks, etc.)
to enable media connections for heat exchangers. Within the operational space it is permitted to
install systems, pipeworks, support structures only if their disassembly and assembly can be done
problem-free for the time when service and repair works are performed.

Fig. 1. Setting location

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11.3. CONNECTING SECTIONS

Level the adjacent unit sections so that blocks t tightly vertically and horizontally. Before anchoring
of the unit on the setting site, screw individual unit sections together following the dimensional
drawing delivered with the unit documentation. At contact points of section structure proles,
before screwing, check:

» whether self-adhesive seal delivered with the unit is provided,
» whether it is tted properly,
» whether there are no visible breaks on its perimeter.

When sealing between sections shows any irregularity, correct it before screwing of sections so that
maximum tightness between them is kept.
In all sections have connectors to be screwed together to achieve maximum tightness between the
unit sections. If within the unit a silencing section is provided, before screwing of the sections remove
removable splitters to have an easy access to connectors mounted in casing structure corners.
If other elements of the unit equipment, such as heating, cooling coils, droplet eliminator make the
access to connectors difcult, carefully, remove the above elements and protect against damage.
Once all sections are screwed, re-t the above elements in place.

Before screwing of sections and installing them in the correct sequence, do not connect
any cooling / heating media, ducts, condensate drains and associated system, e.g.
electrical power.

Fig. 3. Connecting ventilation ducts

11.4. CONNECTING VENTILATION DUCTS

Ventilation ducts should be connected to the unit using exible connections preventing transmission
of vibrations and eliminating slight alignment deviations between a duct and the unit exhaust. Ducts
connected to the unit must be supported or suspended on own support elements. Method of
routing the ducts with ttings should eliminate the possibility of increase in noise levels within the

ventilation system.

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Fig. 3. Connecting ventilation ducts

11.5. CONDENSATE DRAINAGE

Condensate collection connections are routed to outside of the casing from drip trays on water
cooling coil, freon evaporation coil and rotary heat exchanger. These connections should be
connected to siphons for draining the condensate from the device. The required height of siphons
is 100 mm.

Due to different pressures in sections when operating the unit, it is allowed to connect

few condensate draining connections to a single siphon. Siphons of different sections

can be connected by a single outow drain on condition the drain has contact with the

ambient air (vent).

Before starting the unit ll the siphons with water. In cool environment insulate the water drain and
possibly use an adequate system for protection of the condensate drainage against freezing.

Fig. 4. Connecting condensate drainage

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11.6. CONNECTING HEATING AND COOLING COILS

Connecting heat exchangers should be completed so as to protect them against possible stresses
which could cause mechanical damages or leaks. Connections on heat exchangers should not
be affected by weight of the pipework or thermal stresses. Depending on local conditions use
compensation in pipework system on supply and return in order to reduce length-wise expansion of
pipeworks. During installation of the supply system to heat exchangers with threaded connection,
heat exchanger connection should be locked using an additional wrench. The supply system should
be arranged so that it creates no interference in access to other sections of the unit. Supply and
return connections on heat exchangers should be connected so as the heat exchanger operates in
counter-ow system. Operation in counter-ow system reduces average difference in temperature
which determines the heat exchanger efciency.

Connection of freon cooling coil to the supply system with refrigerating unit should be
carried out by a qualied cooling system technician in accordance with valid rules for
freon condensation equipment.

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Fig. 5. Location of connecting pipes

11.7. ELECTRICAL CONNECTION

Electrical connections of elements of the unit equipment should be carried out by properly qualied
and authorized personnel in accordance with standards and regulations valid in a country of
the device installation. Sections and types of cables (e.g. screened cables) feeding the individual
functional equipment components should be selected according to current rating and conditions
specic for the unit location (e.g. ambient temperature, method of cable installation, distances from
the power cubicle). Before connecting the power supply make sure the voltage and frequency values
of the mains are compatible with the data given on data plates of the devices. Admissible tolerances
in values of the supply voltage and its frequency in relation to the values given on the data plate are
±5%. If any incompatibilities are found, do not connect the devices.

11.7.1. ROTARY HEAT EXCHANGER

The rotary heat exchanger is driven by a drive unit comprising a gearmotor and a frequency
converter. The drive unit can be connected to a standard 0-10V control signal. Frequency converter
is powered by 1~230VAC/50Hz. Rotary speed control signal (0-10V) should be connected with a
two-wire screened control cable.

11.7.2. FAN MOTOR

In OPTIMAX air handling units it is possible to install fans with asynchronous - AC or electronically
commutated - EC motors. Depending on the size, units are equipped with one or two fans for the
air supply and exhaust, respectively. Parameters are given for a single fan.
Asynchronous - AC motors of fans can be used in dusted and humid environments (IP54), and
their insulation (F class) is suitable for operation with frequency converters. No additional means to
provide protection of the motor against conditions in the fan section are required. Fan motors with
direct drive as standard are supplied from frequency converter with 3-phase voltage. 3~400V/50Hz
motor windings should be connected to corresponding terminals of the frequency converter.
Connection should be done through short-circuit protection for rated current of the motor type
used. Overload protection should be implemented on the frequency converter by activating specied
rated parameters of the motor in accordance with manual delivered with the frequency converter.
When supplying the motor from the frequency converter, currents of high frequencies or harmonic
components of voltages in motor powering cables may cause electromagnetic interferences.
Connection between the frequency converter and the motor should be carried out using screened
cables, in accordance with the guidelines as given in the frequency converter’s Operation and
Maintenance Manual (DTR). Before commissioning and after a long storage or idle period, make
sure to measure the insulation resistance between the casing and the windings, by applying direct
current. Minimum insulation resistance for a new, cleaned or repaired winding should be 10 Ω in

relation to earth.

Rated parameters for single fans with asynchronous - AC motors

Air supply Air exhaust

Power

Unit size

OptiMax-10 1,1 2,4 400 1 1,1 2,4 400 1

OpitMax-20 3,0 6,0 400 1 2,2 4,53 400 1

OptiMax-30 2,2 4,53 400 2 1,5 3,19 400 2

OptiMax-40 4,0 7,83 400 2 3,0 6,36 400 2

OptiMax-50 5,5 11,1 400 2 4,0 8,3 400 2

Current

[kW]

[A]

Voltage

[V]

Number of

fans

Power

[kW]

Current

[A]

Voltage

[V]

Number of

fans

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EC motors: single 1~230V (OTIMAX-10) and 3-phase 3~400V (other sizes) feature a very high
efciency, low noise level and high durability and reliability. Control signal dependant rotation
adjustment enables accurate and optimum adjustment of the unit’s operation within a particular
ventilation system. Within the motor housing all electronic control elements are integrated:

» motor thermal protection system PTC (requires no additional external thermal protection);
» rotation adjustment system, which can be controlled by an external controller with 0…10V

DC analogue signal (option 4…20mA). Analogue signal can be achieved also by means of a

potentiometer (10kΩ) connected to adequate terminals;
Unit fans are equipped with terminal blocks installed in fan motor box. Power and control cable
should be inserted into terminal box of the motor box casing, with previously removed cover and
blinded holes. Connection of the cables should be carried out according to the diagram in Fig. 1
(fan control outputs cannot be connected in parallel). The cables may also be are already wired by
JUWENT (for orders including automatic equipment).
In order to avoid any interferences, pay attention to sufcient clearance between supply and control
cables. Length of control cables should be max. 30m, and if longer than 20m they must be screened.
When a screened cable is used, the screen should be one-side connected to protective conductors,
i.e. only to a device with protective conductor.

Fig. 1 Connection diagram for EC fan

Rated parameters of single fans with EC motors

Unit size

OptiMax-10 0,78 4,0 230 1 0,78 4,0 230 1

OpitMax-20 3,9 6,2 400 1 2,5 4,0 400 1

OptiMax-30 3,0 4,8 400 2 2,5 4,0 400 2

OptiMax-40 5,2 8,4 400 2 2,9 4,8 400 2

OptiMax-50 6,0 9,4 400 2 3,5 5,6 400 2

Power

[kW]

Air supply Air exhaust

Current

[A]

Voltage

[V]

Number of

fans

Current

[kW]

Prąd

[A]

Voltage

[V]

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Number of

fans

Do not route supply cables through inspection panels. Do not start motors if they are
not provided with short circuit and overload and voltage drop protection according to
PN-89/E-05012.

In order to ensure safe operation of the device make sure to install a service switch outside the fan

section to cut off the power supply to the fan motor during service works. Service switch should

be placed nearby inspection panel of the fan section. In standard air handling units are tted with

service switches and wiring from the motor to the service switch. Connection to the switch terminals

are carried out by installer.

Service panel of the fan section is additionally secured by a clamp operated with a hex wrench. Thus

there is no possibility of any accidental opening of the service panel while the device is in operation.

Disconnection of the power supply circuit with the service switch must take place with
the de-energized device. Do not install the service switch on inspection panels.

Never start and operate a motor without natural or protective grounding.

Route power cables from the fan motor through rubber bushings located in the unit
casing panel. When openings for guiding power cables in the motor terminal boxes are
blanked with a thin layer of cast iron, remove it carefully.

12. AUTOMATIC EQUIPMENT

The below plug & play automatic equipment system diagrams provide operation and protection

control, as well as comfort while maintaining low operation costs of the device. With these systems

it is only required to set the desired air parameters. All the rest is ensured by automatic adjustment

system which adjusts to both the internal, and external conditions.

Automatic equipment enables operation control of standard and optional OPTIMAX air handling

unit equipment:

» Standard equipment for OPTIMAX air handling units:

• air supply / exhaust fans (adjustable within 0...100%);

• rotary heat exchanger (adjustable within 0...100%);

• duct temperature sensor (air supply, exhaust, external and for rotary heat exchanger);

• damper actuator for supply / exhaust (ON/OFF);

• pressure switch for supply / exhaust lter (ON/OFF);

» Optional equipment for OPTIMAX air handling units:

• heating / cooling coil valve actuator (adjustable within 0...100%);

• heating / cooling coil pump (ON/OFF);

• freon evaporation coil (ON/OFF or 0...100%);

• heating anti-freezing thermostat (ON/OFF).

For orders on JUWENT automatic equipment, its box is integrated into the air handling section and

wired to the installed automatic equipment. The user needs to connect the power supply (1~230V)

and wiring, and connect optional components with duct temperature sensor for air supply.

All functions of the device operation are supervised by the controller (placed inside the cabinet), and

remote control is possible via external HMI panel.

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Built-in automatic equipment components

and power supply and control box.

Box for connecting optional automatic equi-

pment components and main switch with

power supply connection.

OPTIMAX air handling units delivered without the JUWENT automatic equipment have no
built-in power supply and control box in the unit section and wiring.

12.1. AUTOMATIC EQUIPMENT COMPONENTS

HMI REMOTE PANEL

Main functions provided by the panel:

» 8 lines of text with blue or white backlight
» simple operation with knob:

• changing air parameters

• air ow control (stepless/with dened speed)

• setting of work calendar

• start/stop

» alarm acknowledgement button
» information button:

• air parameters

• •states of failures
» dening passwords for each level of access
» support for multiple languages
» remote or local connection to the controller;
» powering via process bus
» possibility of mounting on the wall
» rmware update via USB
» BMS - ModBus (LON / ETHERNET)

Supply voltage

Width [mm]

Height [mm]

Depth [mm]

Connection type

Wire type

Maximum wire length

[m]

Protection level

24V AC/DC from controller

144

96

26

KNX RS-485

One twisted-pair

700 50

Four twisted-pair

IP31

(Ethernet)

ANTI-FREEZE THERMOSTAT

Protects the heating coil against freezing. Mounted on the unit side wall, and the capillary is laid on
the heat exchanger’s surface.
Setting a limit temperature (recommended from 4 up to 5°C) is possible thanks to a union on
the thermostat.When ordering a complete automatic equipment set with the unit, thermostats are
mounted inside the unit as standard.

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O

C

Measuring range

Factory set-point

Contact type

Capillary length

Protection level

-5...+15

O

C

5

switching

3 or 6m

IP54

1-2 Alarm freezing

1-4 Normal operation mode

DIFFERENTIAL PRESSURE SWITCHES

The pressure switch is a component designed for indicating of air lter contamination.

Measuring range

Contact type

Protection level

20...1000Pa

switching

IP54

Filter monitoring

3-1 Closed contact at

pressure drop

3-2 Closed contact at

pressure

AIR DAMPER ACTUATORS

To control air dampers actuators are used, and they are intended to set an air damper in a desired
position. Depending on control method for dampers within the units, actuators of the following
types are used:

•open/close (on/off) with return spring.

•open/close (on/off) without return spring.

Actuator type

Supply voltage

Close / open time

Protection level

on/off

24V AC

150 sec.

IP54

On/off with the spring

1 - Potential

2 - Ground

On/off without the spring

6 - Control signal open
7 - Control signal close

VALVES

Three-way valves applied within the system are intended to mix, and therefore should be installed
on the return due to lower temperatures of return ducts within the heating system.

Symbol DN kVS, m3/h t[OC] PN

V20-110 20 4 1...110 16

V25-110 25 6,3 1...110 16

V32-110 32 16 1...110 16

V40-110 40 25 1...110 16

V50-110 50 31 1...110 16

S: Supply
R: Return
H: Heat exchanger
Z: cut-off valve manually operated
P: circulation pump
MV: 3-way control valve operated
by valve actuator

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VALVE ACTUATORS

For direct installation on the valves electric power actuators are used, and they provide a step-less

valve control.

The actuator is mounted on the valve using a connecting nut, and during the installation the actuator
must be set in 0 position. It is recommended to install the valve in such position so that the actuator
is above the valve in an accessible location.

Actuator type

Supply voltage

Close / open time

Protection level

0...10V continuous
signal

24V AC

150 sec.

IP40

1 - Potential
2 - Ground
8 - Control signal 0..10V

* optional elements

Fig.1 Connection diagram for OPTIMAX automatic equipment components to power supply box.

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AUTOMATIC EQUIPMENT SYSTEM DIAGRAMS

Automatic equipment system for air supply and exhaust AHU with rotary heat exchanger

Automatic equipment system for air supply and exhaust AHU with rotary heat exchanger and
water heating coil

Automatic equipment system for air supply and exhaust AHU with rotary heat exchanger,
water heating and cooling coil

DESIGNATIONS:

M1 - supply air damper actuator M2 - exhaust air damper actuator
MV1* - 3-way heating coil valve with actuator F1 - supply lter pressure switch
MV2* - 3-way cooling coil valve with actuator F2 - exhaust lter pressure switch
B1* - duct supply temperature sensor B5 - external temperature sensor
B2* - duct sensor for exhaust temperature B3* - anti-freeze thermostat
Pw - water pump Nw - water heating coil
CHw - water cooling coil

* installed optionally depending on the unit system

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Automatic equipment system for air supply and exhaust AHU with rotary heat exchanger,
water heating and cooling coil

DESIGNATIONS:

M1 - supply air damper actuator M2 - exhaust air damper actuator
MV1* - 3-way heating coil valve with actuator F1 - supply lter pressure switch
MV2* - 3-way cooling coil valve with actuator F2 - exhaust lter pressure switch
B1* - duct supply temperature sensor B5 - external temperature sensor
B2* - duct sensor for exhaust temperature B3* - anti-freeze thermostat
Pw - water pump Nw - water heating coil
CHw - water cooling coil

* installed optionally depending on the unit system

13. PREPARING FOR START-UP

The unit start-up when commissioning the ventilation system must be carried out by properly
qualied and skilled personnel only. Before the start-up thoroughly clean the equipment and
ducting inside. Check whether:

» during assembly works there have been no damages to equipment and system parts, and

automatic equipment and automatic equipment components,

» all ventilation devices are mechanically installed and connected to the ventilation system,
» earthing conductors connecting the unit with ventilating ducts are mounted,
» hydraulic and freon system is completely installed and prepared for operation, and heating or

cooling medium is available during the start-up,

» electric power receivers are wired and ready for operation,
» traps and drain system for condensate from drip trays are installed,
» all automation elements are installed and wired.

13.1. WIRING SYSTEM

Before electric power receivers junction boxes are closed, check:

» on the basis of available wiring diagrams, compatibility of wiring connections and terminal

connections,

» whether the applied protections of all electric power receivers work properly,
» whether all bolts are tightened, and support elements and electric connections (also unused

auxiliary terminals, if present) are properly mounted,

» whether wires and cables conform with all requirements for protection, routing, section, etc.,
» whether earthing and protecting connections are correct,
» whether inside junction boxes there are no wire scraps,
» condition of gaskets and sealing surfaces.

13.2. FILTERS

Air lters in air conditioning units prevent penetration of dust and dirt into a ventilated room. Apart
from that they provide an effective protection against soiling of other functional elements of the
unit, and heat exchangers in particular. When using thee unit lters must always be tted. Before

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the unit is closed:

» remove the lter protective foil,
» t the lters in their guides,
» check condition of the lters and tightness of their tting in the guides,
» check settings of differential pressure switches (if any) indicating the accepted difference

in static pressure exceeding of which signals the need of replacing the lter. According to EN
13053, this value is 200Pa for M5 & F7 lters.

13.3. WATER HEATING COIL

Check:

» condition of heating coil panels,
» supply and exhaust pipework for correct connection,
» whether capillar of the thermostat protecting the heat exchanger against freezing is rmly

attached to the heating coil casing,

» set point of the thermostat protecting the heat exchanger against freezing (factory set point

+ 5°C),

» whether control valve on heating coils is installed in accordance with markings on its housing.

13.4. WATER COOLING COIL

Check:

» condition of cooling coil panels,
» supply and exhaust pipework for correct connection,
» setting of droplet eliminator in relation to air ow direction,
» siphon for correct mounting – before starting the unit ll the siphon with water,
» serviceability of condensate drain system.

13.5. FREON EVAPORATION COIL

Check:

» condition of cooling coil panels,
» supply and exhaust pipework for correct connection,
» setting of droplet eliminator in relation to air ow direction,
» siphon for correct mounting – before starting the unit ll the siphon with water,
» serviceability of condensate drain system,
» after completed installation of the cooling system, and before its lling with a cooling medium,

rst perform pressure test, and end-to-end leakage test. The test pressure depends on working
pressure of the medium used,

» pressure test may only be performed with use of dried nitrogen (air or standard nitrogen for

commercial use brings in too much moisture into the system),

» leakage test should be carried out very carefully, and if during the subsequent vacuum
production in the system it is impossible to maintain the vacuum conditions, take the pressure
test again.

13.6. ROTARY HEAT EXCHANGER

Check whether:

» rotor locks are removed,

» transverse and circumferential seal does not block (interferes with) the rotor operation,

» motor, controller, speed sensor are properly connected.

13.7. FAN UNIT

Check whether:

» around the fan there are no objects which could be sucked into rotor once started,

» fan rotor rotates freely, without rubbing housing parts,

» motor is properly set and whether the system and operating conditions are compatible with

the data plate (supply voltage, current, frequency, winding connections,

» motor rotor rotates freely, without rubbing the stator,

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» air for motor cooling can be freely supplied and exhausted from the motor housing,
» earthing and protecting connections are correct,
» the designed fan rotary speed would not be exceeded (see the unit specications),
» all bolts, support elements and electric connections are tightened,
» supply cables inside the fan section are away from all movable drive parts and xed with

adequate holders to electric wires,

» all dampers on ventilating duct system are arranged as designed,
» direction of rotor rotation is compatible with the arrow on the fan housing,
» impulse-activate the fan, in case of reverse rotation direction replace any two phases in the

motor terminal box or change rotation direction on the frequency converter,

» after all the above inspection procedures have been completed, carefully close all inspection

panels on the device,

Do not operate the device if any inspection panel is opened.

14. START-UP AND ADJUSTMENT

Start-up is intended to assess whether the unit conforms with the design and is suitable for use.
The start-up procedure and adjustments of ventilation and air conditioning systems can only be
performed by a qualied crew of personnel competent in start-up, and equipped with a set of basic
measuring instruments. Once the procedure described in “Preparing for start-up” chapter has been
completed, it is possible to approach the rst start-up. It is advised to perform the start-up without
the F7 secondary lter cartridges on.
The fan should be started at reduced load and run to reach parameters as near the assumed
operating point as possible. Reduced load can be achieved by decreasing rotational speed thus
using the frequency adjustment on the frequency converter (for AC motors). While increasing the
load, pay attention to constantly control level of the current drawn by the motor.

Make sure that for the design air parameters, the fan motor supplying current is within
its rating.

It is recommended, in the automatic equipment system, to ensure that dampers are pre­opened on the unit inlet before the fan is started. This has an effect on damper durability

and operation.

Failure to follow the recommendations for the rst start-up may lead to the fan motor overload and
its serious damage. Once started check whether:

» there are no alarming noises and unnatural mechanical sounds,
» there are no vibrations of the unit that can be considered to be excessive.

Let the unit operate for about 30 min. Then turn it on and inspect individual sections. Pay special
attention to:

» lters (for damages),
» efciency of condensate drainage,
» fan unit.

Once the start-up is complete, replace or clean primary lters. To achieve the presumed effects,
among others make sure to carry out adjustments and control measurements.

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14.1. MEASURING AIR QUANTITY AND ADJUSTING EFFICIENCY OF THE UNITS

Before any measurement and adjustment check whether dampers and adjusting elements at all
grilles or diffusers and on ducts are set as designed. Air handling unit has measuring points intended
to measure pressure difference between fan inlet funnel and chamber in front of the fan. On the
basis of this value and a xed factor dedicated for a given fan size, it is possible to calculate current
air ow using the below formula:

Qv=k * √dP

Qv - volume air ow rate [m3/h]. When, the unit is equipped with 2 fans for the same air ow, multiply the Qv value by 2
k - given on each device’s data plate; the k value is given for air density of 1.2 kg/m
dP - measured pressure difference [Pa]

3

When the calculated value is different from the designed, re-adjust the frequency set-points on
the frequency converter so as to achieve the desired air ow. When adjusting the fan rotary speed
to higher, control the motor power consumption and do not let the rated current to be exceeded.
If necessary, contact any JUWENT Authorised Service Point or directly the Technical Department
to determine possible max. fan rotational speed or max. current that can be set on the frequency
converter for a given fan size.

If, based on the design, measurement uncertainty for air ow for the whole system has
not been dened otherwise than in PN-EN 12599-2002 this value shall be considered
correct, even if it exceeds ±15% of the designed value.

14.2. ADJUSTING WATER HEATING COIL

Water heating coil adjustment involves checking the effect of its operation from the air side
through air temperature measurements in front and behind the heating coil, with supply and return
temperatures, and quantity of the heating medium ow as designed.

Water heating coil efciency adjustments are carried out after having determined the
adequate air capacity owing through units.

The heating coil efciency is adjusted by the change in water supply temperature. This is achieved
by mixing the supply water at high temperature with water at lower temperature returning from the
heating coil, in a 3-way valve. Once mixed the heating coil supplying water reaches an adequate
temperature depending on the degree of mixing. External conditions close to measuring conditions
occur in a year-cycle within a relatively short time. In most cases, this involves adjustments to be
carried out in intermediate conditions, for which adequate conversion rate to design parameters
should be used.

If, based on the design, measurement uncertainty for air temperature behind heating
coil has not been dened otherwise than in PN-EN 12599-2002 this value shall be
considered correct, even if it exceeds ±2°C of the designed value.

Checking function of the thermostat protecting the heat exchanger against freezing is only possible
when the temperature of air approaching the heat exchanger is lower than the set-point on the
thermostat (factory set-point +5°C). The safest way is to take this step, if supply air temperature is
by 1-2 degrees above zero. Then with the unit operating, close off the heating medium supply and
observe the thermostat function. Do this before commissioning the unit to be normally used.

14.3. ADJUSTING WATER COOLING COIL

Water cooling coil adjustment involves checking the effect of its operation from the air side through
air temperature measurements taken in front and behind the cooling coil, with supply and return
temperatures, and quantity of the cooling medium ow as designed.

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Cooling coil efciency adjustments are carried out after having determined the adequate
air capacity owing through units.

The cooling coil efciency is adjusted by the change in water supply temperature. This is achieved
by mixing the supply water at low temperature with water at higher temperature returning from
the cooling coil, in a 3-way valve. Once mixed the cooling coil supplying water reaches an adequate
temperature depending on the degree of mixing. External conditions close to measuring conditions
occur in a year-cycle within a relatively short time. In most cases, this involves adjustments to be
carried out in intermediate conditions, for which adequate conversion rate to design parameters
should be used.

If, based on the design, measurement uncertainty for air temperature behind cooling
coil has not been dened otherwise than in PN-EN 12599-2002 this value shall be
considered correct, even if it exceeds ±2°C of the designed value.

14.4. ADJUSTING FREON EVAPORATION COIL

Coil adjustment involves checking the effect of its operation from the air side through air temperature
measurements taken in front and behind the coil, cooling medium evaporation temperature, as
designed.

The coil efciency adjustments are carried out after having determined the adequate air
capacity owing through units.

The coil efciency is adjusted by the change in cooling medium evaporation temperature. External
conditions close to measuring conditions occur in a year-cycle within a relatively short time. In most
cases, this involves adjustments to be carried out in intermediate conditions, for which adequate
conversion rate to design parameters should be used.

If, based on the design, measurement uncertainty for air temperature behind cooling
coil has not been dened otherwise than in PN-EN 12599-2002 this value shall be
considered correct, even if it exceeds ±2°C of the designed value.

15. USE AND MAINTENANCE

Personnel in charge of the unit operation should learn the instruction manual herein
before any use and maintenance. If no personnel of the required technical qualications
is available, on-going inspections of the units should be carried out by JUWENT
Authorized Service..

Any and all damages to the unit and its parts resulting from failure to follow the
guidelines in the documentation shall not be subject to repairs under the warranty. Basic
technical data of the units such as type, types and dimensions of components (lters,
heat exchangers, fans, electric motors) are included in the data sheet delivered with any

and all devices.

Any service works on the unit should be carried out only with the device shut off. In
order to ensure safe operation of the device make sure to install a service switch outside
the base section to cut off the power supply to fan motors during service works.

Disconnection of the power supply circuit must take place with the de-energized device.

Careful, regular maintenance and control of technical condition of the unit and its
equipment is necessary to nd any incompatibilities on an early stage before major
damages occur.

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The herein documentation includes only general instructions for control intervals to
ensure correct operation of the unit due to various external conditions of their
functioning and use. Therefore control intervals must be adjusted to the current
conditions (contamination, number of starts, load, etc.). Personnel in charge of the unit
operation should, from the moment of its starting, run on-going records in “Inspection
and Maintenance Chart”, where any works resulting from normal, routine operation of
the device should be included. A carefully run record is the only valid document to
conrm condition of the device operation, terms of current inspections, and any
potential device malfunctions found.

When it is necessary to contact JUWENT representations always give the device’s serial
numbers which can be found both on the housing and in the documents delivered with
the unit.

Time intervals between particular activities are dened for the unit non-stop operation
and for the system with low dusting and absence of other conditions which would
interfere with normal operation of the device. In environments where high dusting is
present on the supply and/or exhaust it is advisable to carry out inspection more
frequently.

Spare parts and accessories for the unit can be ordered at the local JUWENT Authorised
Service Point. When placing an order, give the device type and its serial number. This
information can be found on the base section’s data plate.

15.1. AIR DAMPERS

If excessive soiling and improper operation is found, clean it using either of these:

» using industrial vacuum cleaner with soft suction nozzle,

» blow with compressed air,

» clean with pressurized water with mild detergents which cause no corrosion to aluminium,

» pay particular attention to the damper tightness after it is closed, particularly from the external

air side, as otherwise water heating coil may be frozen.

15.2. FILTERS

With standard conditions of the unit operation, lters should be replaced approximately once every
half year. An indication when lters need to be replaced (apart from visual assessment of their
function) is an increase in the pressure above 200 Pa for M5 & F7 lters.
Degree of ltration is different for each types of lters, therefore when replacing them it is particularly
important to install lters of the same ltration class.
Pleated and bag lters are intended for a single use. When replacing a lter also remember to clean
the ltration section by dusting or wiping it with use of a damp cloth. If a new set of lters needs
to be ordered at a JUWENT Authorised Service Point, give the lter type and class and size of the
unit, and possibly size and number of lters. This data is given each time on data plate on the unit
located in base section.
The units must be operated with installed air lters, as otherwise power consumption of the fans
may exceed the set points, and thus result in burning of motor windings.
The table below includes lter dimensions for a given unit size. For M5 lters the capacity in litres is
given as total for supply and exhaust side.

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Unit size

OptiMax-10 695x300x48 2 695x300x360 1

OpitMax-20 495x450x48 4 495x450x500 2

OptiMax-30 645x600x48 4 645x600x500 2

OptiMax-40 545x775x48 6 545x775x600 3

OptiMax-50 645x925x48 6 645x925x600 3

Preliminary lter M5 Very ne lter F7

Dimensions No. of pieces Dimensions No. of pieces

15.3. WATER HEATING COIL

Water heating coil in use should be equipped with automatic anti-freeze protection system.
Alternatively, in the winter period, the heating coil can be supplied with a non-freezing agent (e.g.
glycol solution). If the supply of a non-freezing agent is cut or during the unit idle period and
possibility of decreasing air temperature below +5°C, the heating coil should be emptied.
At least every 6 months check whether heating coil panels are not contaminated. Dust deposits on
the heating coil surface reduce its heating capacity and increase in pressure drop at the air side.
Even if the unit is equipped with lters, it is natural that at the air supply side dust will deposit on the
heating coil panels. If excessive soiling is found, clean using the following methods:

» using vacuum-cleaner with soft nozzle from the air supply side,
» blowing compressed air jet in the direction opposite to the normal air ow, directing the air

jet in line with panel arrangement,

» washing with water with cleaning agents which cause no corrosion to aluminium and copper.

Before cleaning provide protection of the adjacent unit sections against released dirt and dust.
In order to achieve full thermal efciency, the heating coil must be well deaerated. Therefore air
vents plugs are used. They should be placed in the top most point of the supply system.
When the device remains in standstill condition, the heating medium ow should be limited to a
minimum so that the temperature inside the device is no more than +60°C. Increase in temperature
above this value may cause damage to some components or sub-assemblies (motor, bearings,
plastic parts, etc.) installed in sections adjacent to the heating coil.
For heating coil supplied with a solution of glycol, additionally check the contents and density of
glycol in the circuit.

15.4. WATER COOLING COIL

At least every 6 months check whether cooling coil panels are not contaminated. Dust deposits on
the cooling coil surface reduce its capacity and increase pressure drop at the air side. Even if the unit
is equipped with lters, it is natural that at the air supply side dust will deposit on the cooling coil
panels. If excessive soiling is found, clean using the following methods:

» using vacuum-cleaner with soft nozzle from the air supply side,
» blowing compressed air jet in the direction opposite to the normal air ow, directing the air

jet in line with panel arrangement,

» washing with water with cleaning agents which cause no corrosion to aluminium and copper.
Before cleaning provide protection of the adjacent unit sections against released dirt and dust.
In order to achieve full efciency, the cooling coil must be well deaerated. Therefore air vents plugs
are used. They should be placed in the top most point of the supply system.
When inspecting cleanliness, also make sure to check whether droplet eliminator is clean and
condensate tray drainage is operable, and so as the water siphon. Before the unit is started, ll
the water siphon with water. When contaminated, wash droplet eliminator with warm water with
detergents.
For cooling coil supplied with a solution of glycol, additionally check the contents and density of
glycol in the circuit.

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15.5. FREON EVAPORATION COIL

At least every 6 months check whether cooling coil panels are not contaminated. Dust deposits on
the cooling coil surface reduce its capacity and increase pressure drop at the air side. Even if the unit
is equipped with lters, it is natural that at the air supply side dust will deposit on the cooling coil
panels. If excessive soiling is found, clean using the following methods:

» using vacuum-cleaner with soft nozzle from the air supply side,
» blowing compressed air jet in the direction opposite to the normal air ow, directing the air

jet in line with panel arrangement,

» washing with water with cleaning agents which cause no corrosion to aluminium and copper.

Before cleaning provide protection of the adjacent unit sections against released dirt and dust.
When inspecting cleanliness, also make sure to check whether droplet eliminator is clean and
condensate tray drainage is operable, and so as the water siphon. Before the unit is started, ll
the water siphon with water. When contaminated, wash droplet eliminator with warm water with
detergents.
When washing freon evaporation coil with warm water remember to empty cooling system by
means of suction of freon into a tank. Otherwise high risk of uncontrolled increase in freon pressure
and damage of cooling system may be present.

15.6. ROTARY HEAT EXCHANGER

Servicing of the exchanger only involves an inspection of its technical condition and soiling of the
rotor to be carried out every six months. During service works related to the rotary heat exchanger
check whether:

» the rotor runs freely; noticeable resistance may be caused by excessive pressure on seal
brushes and their rubbing against the rotor’s edge. Thus position of brushes should be corrected.
Replace any worn brush seals. If the previously removed brush seal needs to be remounted, pay
attention to install it so that its position against the rotor rotary direction remains unchanged.
Once seal brushes are replaced or adjusted, the heat exchanger should operate for 30 minutes
so that brushes can t into the rotor surface. After that time measure the motor current and
compare it with the rated current to check whether the motor is not overloaded

» drive belt is not damaged and whether it is clean and does not slide on the rotor cylindrical
part. If, despite maximum tension ensured by tensioning system, there is belt slack, shorten or
replace the belt,

» air inlets are not covered with dust or otherwise contaminated. In order to clean the rotor use
one of the methods described above regarding other heat exchangers.

Rolling bearing on the rotor and drive motor are constantly lubricated while in use. The amount of
lubricant in bearings as for the moment the heat exchanger is being mounted, is enough to secure
their long service life and it is not necessary to lubricate them while in use. It is recommended to
clean the motor and gears of the dust deposits so that on the motor surface no insulation layer is
present causing increase in the drive working temperature.

15.7. SILENCING SECTION

Silencing section is tted with removable splitters lled with non-ammable mineral wool absorbing
acoustic energy. In this case, maintenance works involve inspection whether cartridges on silencing
systems are not soiled. Cleaning should be carried out using a vacuum cleaner or by wet wiping of
all surfaces. To clean this section rst remove removable splitters from the casing.

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15.8. FAN UNIT

Before any works (fault, maintenance, servicing) on the unit, and particularly before opening
inspection panels of the fan section and removing guards from live parts, make sure that:

» the device is properly disconnected from the power supply. This applies to both main and

auxiliary circuits,

» rotor is in standstill,
» fan is cooled down, and the temperature on its surface presents no risk of suffering a burn,
» fan is protected against an accidental start.

15.9. FANS

Fans are intended to transfer dust-free or slightly dusted air. They are not intended for use with
aggressive gases, vapours or highly-dusted air. Fan operation in non-compatible environment may
lead to damaging bearings, corrosion, unbalance of rotor and vibrations. For fan servicing check
whether:

» rotor rotates freely,
» is balanced and shows no run-out,
» rotor is securely mounted on the axle,
» rotor is not shifted against entry funnel,
» exible connection (if present) is not damaged,
» all bolts securing the fan unit components are tightened.

Loss of rotor balance may be caused by:

» dust deposits on rotor blades,
» loss of additional balance weights,
» damage to rotor blades.

Inspect contaminations in the housing interior, rotor and motor once every 6 months, and if needed
clean:

» the housing interior with vacuum-cleaner,
» rotor with vacuum-cleaner or using wet cleaning with a mild detergent.

15.10. FANS MOTORS

Careful, regular maintenance and control of motor condition is necessary to nd any incompatibilities
before major damages occur Before any works related to the motor or other motor equipment, and
particularly before removing guards provided for protection against contact with movable or live
parts, make sure that the motor is correctly disconnected from the power supply. Moreover, also
disconnect additional and auxiliary circuits. Follow the below safety rules:

» disconnect the power supply,
» use protection against accidental activation,
» check functionality of safe isolation of power supply,
» use guards on adjacent live parts.

All the above precautions should be kept until all maintenance works are not completed and the
motor is not fully assembled and ready to be started. For fan motor servicing check:

» whether dened specications are met (power consumption, temperature of windings,

bearings),

» whether there are no grease leaks,
» whether the motor operates properly and noises coming from the motor and bearings do

not get louder,

» all mechanical and electrical connections for proper xing,
» resistance of insulation of the windings,
» whether wires and insulations are in good condition and there are no discolourations.

All changes and incompatibilities should be removed immediately. Moreover:

» inspect whether the motor is properly mounted and mounting bolts are tightened,
» check whether the motor housing is not contaminated.

Excess contamination hampers the motor cooling, what in consequence may lead to overheating of
the motor windings and its damage. The motor can be dry cleaned with a brush or blown with dry

compressed air.

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16. CONTROL MEASUREMENTS

After having completed maintenance inspections and works, check and adjust functional parameters
of the device in accordance with recommendations in “Start-up and adjustment”. Any conducted
maintenance and control measurements must be recorded in Inspection and Maintenance Chart.

17. DISPOSAL

The device should be disposed of by a company specialized in dismantling and disposal of such

devices.

18. OHS INSTRUCTIONS

Connection and start-up of the units should be carried out by qualied personnel in
conditions compliant with valid regulations, particularly in use of electrical equipment.

Do not power the system before connecting the unit to protective system.

Do not carry out any repairs and maintenance without having previously turned off the
unit power supply.

Do not operate the unit with removed inspection panel from any unit section.

Person in charge of operation, repair or maintenance must be properly qualied and
authorised in accordance with regulations valid in a country of the device installation.

Location of the unit installation must be equipped with the required protective
equipment providing safe operation and necessary re protection equipment in
accordance with local provisions

Despite the fact that the device has been designed and manufactured in accordance with the
standards valid as for the moment of the manufacture start, injury and damage to health when
using the device is likely. This likeliness is related to frequency of accessing the device when using,
cleaning and repairing it, presence of people within the danger area, and failure to respect the
safety rules as set out in the instruction. Severity of the bodily injury and deterioration of health is
dependant on numerous conditions which can be foreseen partially only by considering them when
designing the device and by providing descriptions and warnings as pictograms in the instruction
manual and on the device. Therefore residual risk is present if recommendations and advices in the
instruction manual and warnings as pictograms placed on the machine are not followed.

19. INFORMATION

Regular inspections carried out by qualied technical service or by JUWENT Authorised Service
Points shall ensure a reliable and problem-free operation for many years. At any time our service
technicians can be called up to conduct start-ups of the devices and maintenance works on them,
and are at your disposal in emergency situations.
At any JUWENT Authorised Service Point you can order spare parts and consumables for your unit.
When ordering the parts, always give the device type and size, and its serial number.

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1. JUWENT Szymański, Nowakowski Spółka jawna in Ryki, hereinafter referred to as Warrantor, gives warranty for own manufactured unit, on
condition however that the unit is used in accordance with conditions as set out in the herein instruction manual and arrangements as set out
below.

2. Warranty claims are considered only by the Warrantor or its Authorised Service Point (hereinafter referred to as: “Obligor”).

3. The Warranty is given on alternative conditions:

a) standard warranty – 24 months from the date of purchase, if the commissioning of the device is carried out on user’s own without the
participation of the Obligor,
b) extended warranty – 36 months from the date of purchase, on condition the Buyer concludes a service agreement with the Warrantor, and
the subject of the agreement is in particular:

– commissioning of devices by the Obligor (on charge),
– training a person to be in charge of supervision over the unit (on charge),
– periodic inspections and maintenance (on charge).

4. Notwithstanding the period of the Warranty given for the unit, the warranty for heating elements of electric heating coils shall be 12 months.

5. For a unit with gas heat exchanger, conditions of warranty for the component are dened in the Warranty Card issued by the respective
manufacturer.

6. Devices operating with the unit, but not being its components (e.g. refrigeration units, steam generators, etc.), are subject to warranty given
by the respective device manufacturer only.

7. The unit is under the Warranty if the following cumulative conditions are fullled:
a) Customer presents valid Device Commissioning Report along with Service Request form,
b) Customer carries out or orders carrying out of on-going and periodic inspections in accordance with the instruction manual, and conrms

that in Inspection and Maintenance Chart.

8. Within the extended warranty period (36 months), it is the Obligor who has the exclusive right to carry out periodic inspections. The perfor-

med works do not extend the warranty period for the unit or its components.

9. Physical defects that also include failure to provide clear specications for the unit by the Warrantor, which are found within the warranty

period, shall be removed (repaired) free of charge on the unit installation site within the period of no longer than 14 calendar days from the date
of reporting of the defect, unless it is necessary to immediately import a defective part, and then the above period should be extended by the
time required to deliver the part. If the repair cannot be carried out or due to its unreasonably high cost, the Obligor shall replace the unit or its
part for a new one.

10. The Warrantor shall decide how the defect is to be removed.

11. Parts replaced during the repair shall become a property of the Warrantor.

12. The Warrantor shall be relieved of responsibility for damages and/or the device’s malfunction in particular being the result of:

a) mechanical damages being consequence of improper assembly, and in particular improper installation of the supply system, handling
carried out by personnel other than the Warrantor or the Obligor,
b) improper storage of the unit, its use not in accordance with the unit instruction manual, tampering with the device or attempts to carry
out any repairs on user’s own,
c) replacement of parts without the consent of the Obligor, further use of the unit with the defect identied by the Buyer,
d) random incidents, Force Majeure including weather phenomena,
e) mistakes during operation, no or improper maintenance, adjustment or use not in accordance with guidelines herein,
f) use of non-original spare parts and components (motors, fans, lters, etc.) for the unit without consent of the Warrantor,
g) failure to follow terms of periodic inspections, i.e. every 6 months and no on-going maintenance between these inspections,
h) operation of the unit in the environment with aggressive chemical agents to the extent for which the unit has not been designed or in
environment the dusting of which requires de-dusting devices to be installed in rooms,
i) use of supply water and boiler water with parameters other than specied in PN-85/C-04601.

13. The following situations are excluded from the Warranty:
a) systems (units) of other origin, which the unit is a part of,
b) parts subject to tear and wear, consumables (lters, gaskets, light bulbs, V-belts, fuses, etc.),
c) activities taken in accordance with guidelines in the unit instruction manual within standard maintenance and inspections,
d) costs for travel of the Obligor’s or Warrantor’s service technicians,
e) compensation for losses or increased costs incurred by the Buyer due to stoppage of the units for the period of waiting for carrying out
of a warranty repair.

14. If the call for service is unfounded, the Buyer shall bear all the related costs.

15. To conrm keeping the terms and scope of activities intended for the unit servicing, records are made by qualied personnel in Inspection

and Maintenance Chart.

16. The Warrantor shall be responsible for physical defects of the unit within the normal value of the defective parts that shall be understood as

their value at prices of purchase valid at the Warrantor on the date of carrying out of a warranty repair.

17. The Warrantor shall not bear any responsibility for losses incurred by the Buyer or third persons being result of the motion of the unit caused

in particular by failure to keep conditions in item 12.

18. If a part or a component is replaced, the warranty period for the unit shall be extended by the time when the Customer had no possibility

to use the unit.

19. The Buyer shall provide the Obligor with a free access to rooms where the units are located. For units installed at considerable heights,

the Buyer shall, on his own, provide adequate scaffolds and lifting equipment. The Buyer is obliged to carry out hydraulic disassembly of heat
exchangers.

20. Any claims should be submitted at a local Representation in writing on the service request form by fax or e-mail along with a copy of Com-

missioning Report.

21. The Obligor shall refuse to carry out warranty activities (periodic maintenance or repair) if the Warrantor or the Obligor are not paid the dues

for the unit or for a service previously delivered.

IV. WARRANTY TERMS AND CONDITIONS

DATE OF SALE STAMP AND SIGNATURE

Special Warranty Terms and Conditions:

Warranty period extension up to ........... months.

Other:

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STAMP AND SIGNATURE

V. DEVICE COMMISSIONING REPORT*

USER OF THE DEVICE:

PLACE OF INSTALLATION:

DEVICE TYPE:

SERIAL NUMBER:

INSTALLATION AND COMMISSIONING

Action

Mechanical installation

Hydraulic connection

Electrical connection

Commissioning

Measurements

MEASUREMENTS OF WORK PARAMETERS TAKEN

Air ow capacity Air ow capacity

Designed

3

/h]

[m

Name and address of the

Contractor

stamp / full name / telephone no.

SUPPLY EXHAUST

Measured

[m3/h]

Date and

signature

Designed

[m3/h]

Remarks

Measured

[m3/h]

Motor Motor

Rated current [A] Measured current [A] Rated current [A] Measured current [A]

*Commissioning of the device should be carried out in accordance with corresponding chapter of the instruction manual.

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VI. INSPECTION AND MAINTENANCE CHART*

DEVICE TYPE:

SERIAL NUMBER:

Scope of

Date of

*Inspection of the device should be carried out in accordance with corresponding chapter of the instruction manual.

Inspected by

inspection

activity

Air dampers

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Check

Clean

Replace

Filters

coil

Air cooling

Air heating

coil

Heat

Fan unit

Silencer

recovery

Automatic

Remarks

equipment

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Date of completion:

VII. SERVICE REQUEST

Request type WARRANTY

User of the device (name)

Contact person:

User's address

Telephone, fax and e-mail

Device type

Serial No.

Year of manufacture

Commissioned by

Description of damage:

POST-WARRANTY CHARGED

NOTE:
ONCE COPIED AND FILLED IN SEND THIS SERVICE REQUEST BY FAX OR E-MAIL ALONG WITH A COPY OF
COMMISSIONING REPORT.

JUWENT shall only accept the requests which are lled in legibly and completely.
If warranty claim is unfounded the claimant shall bear costs of servicing.

Date of issuing of Warranty Order No. (Company Stamp)

......................................................... ...........................

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VIII. ADDITIONAL DOCUMENTS

Depending on the unit conguration, the following documents can be attached additionally as
separate charts:

Technical Data Sheet

Declaration of Conformity

List of Components Installed in the Device;

Specication of Automatic Equipment Components;

List of Elements Attached to the Unit;

Technical Data Sheet includes all information on designed and measured values for

parameters of air and selected components.

This document includes specied elements which are installed in the device, and
moreover clear information is provided to identify them with division to the supply and
the exhaust items.

This set provides a list of automatic equipment components installed in the device and a
gure attached on which these components are marked and their location is indicated.
If no JUWENT automatic equipment system is provided, this document shall not be

attached.

This set is attached only if apart from the unit other elements that are not installed
directly on or within the device are delivered, e.g. when the device is assembled at the
Customer. Such list concerns elements such as adhesives, gaskets, bolts and other.

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