IV Produkt Envistar Top Series Installation guide

Operation and maintenance
Translation of the original instructions
Order number :
Project:
Air Handling Unit
Envistar Top and Home Concept FTX Top 04-21
Envistar®Top

Size
04 
06 
10 
12 
16 
21 
Filter, supply air
ePM10-65% (M5) 
ePM1-50% (F7) 
Black Ridge BR 
Excl. filter 
Filter, extract air
ePM10-65% (M5) 
ePM1-50% (F7) 
Aluminium filter AL 
Excl. filter 
Unit type
ATEM 
ATER 
ATCR 1V  2V 
Home Concept model 
Control equipment
MX 
UC 
MK 
US   
HS   
Unit parts and accessories
Recovery rotor ATRR 
Counter-flow exchanger ATMM 
Air heater water ATEV ATTV 
Air heater electric ATEE
Output var. 1  2  3 
Air heater electric ATET-EV
Output var. 1   2  3  4 
Air cooler water ATET-VK 
Damper ATET-UM, ETET-UM,
ETET-TR, ATET-09 
Sound attenuator ETET-LD 
Unit specifications

Table of Contents
1 Safety precautions
1.1 Lockable safety switch ...........................................................................................................6
1.2 Inspection doors .........................................................................................................................6
1.3 Electrical connection ................................................................................................................6
1.4 Cooling unit .....................................................................................................................................6
2 General
2.1 Intended use ..................................................................................................................................7
2.2 Manufacturer ..................................................................................................................................7
2.3 Designations ..................................................................................................................................7
2.4 CE marking and EU Declaration of Conformity ....................................................8
2.5 Maintenance ...................................................................................................................................9
2.6 Handling of refrigerant ............................................................................................................9
2.7 Extended warranty ..................................................................................................................10
2.8 Spare parts ...................................................................................................................................10
2.9 Dismantling and decommissioning ............................................................................10
3 Technical description
3.1 Envistar Top air handling unit ..........................................................................................11
3.2 Home Concept model ..........................................................................................................11
3.3 Cooling unit (code ATCR) ................................................................................................... 12
4 Wiring instructions and fuse protection
4.1 MX – Complete control equipment and
UC – Complete electrical connection to terminal (without DUC). ........15
4.2 MK – Fans and heat exchangers electrically connected to terminal 16
4.3 HS, US - Without control and without electrical connection ................... 16

Table of Contents, cntd
5 Operation
5.1 Hygiene inspection .................................................................................................................18
5.2 Actions in case of standstill ............................................................................................. 18
5.3 Commissioning .........................................................................................................................19
5.4 Cooling Status – Cooling unit, size 04 ..................................................................... 20
5.5 Cooling Status – Cooling unit, size 06-12 ............................................................. 23
5.6 Cooling Status – Cooling unit, size 16-21 ............................................................. 25
6 Maintenance instructions
6.1 Service schedule ......................................................................................................................27
6.2 Filter ...................................................................................................................................................29
6.3 Rotary heat exchanger (code ATRR) ......................................................................... 33
6.4 Counter-flow exchanger (code ATMM) ...................................................................37
6.5 Air heater water (code ATEV) ........................................................................................... 39
6.6 Air heater Electric (code ATEE, ATET-EV) ...............................................................41
6.7 Air cooler water (code ATET-VK) ...................................................................................42
6.8 Fan unit (code ELFF) .............................................................................................................43
6.9 Damper (code ATET-UM, ETET-UM, ETET-TR, ATET-09) ...........................48
6.10 Sound attenuator (code ETET-LD) .............................................................................49
6.11 Cooling unit (code ATCR) .................................................................................................50
7 Alarm management and troubleshooting
7.1 Cooling unit – sizes 04 and 16-21 ...............................................................................51
7.2 Cooling unit – size 06-12 ....................................................................................................53

Page 6
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
1 Safety precautions
Observe warning labels on the unit as well as the following safety precautions:
1.1 Lockable safety switch
WARNING!
High voltage, risk of personal injury.
Working on/servicing the unit –Shut down the unit via the ser-
vice switch in the control equipment, then turn the safety switch
to the 0 position and lock it.
NB:
The safety switch is not designed for starting/stopping the unit. Always
use the control equipment to start and shut down the unit.
1.2 Inspection doors
WARNING!
Positive pressure inside the unit, risk of personal injury.
Allow the pressure to drop before you open the inspection
doors.
WARNING!
Rotating fan impeller, risk of personal injury. Shut down the unit
via the service switch in the control equipment, then turn the
safety switch to the 0 position and lock it. Wait at least 3 min-
utes before opening inspection doors.
NB:
The doors in front of moving parts should normally be locked; there are
no safety guards. Before carrying out work, unlock the doors with the
key provided.
1.3 Electrical connection
WARNING!
Rotating fan impeller, risk of personal injury. The unit must not
be energised until all ducts have been connected.
NB:
Wiring of connections and other electrical work may only be carried out
by a qualified electrician or by service personnel recommended by IV
Produkt.
1.4 Cooling unit
WARNING!
Hot surfaces, risk of personal injury. Shut down the unit via the
service switch in the control equipment, then turn the safety
switch to the 0 position and lock it. Wait at least 30 minutes
before opening the compressor inspection doors.

Page 7
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
2 General
2.1 Intended use
The air handling units in the Envistar Top series are intended for comfort ventila-
tion in buildings.
2.2 Manufacturer
The Envistar air handling units (AHUs) are manufactured by:
IV Produkt AB
Sjöuddevägen 7
SE-350 43 VÄXJÖ
2.3 Designations
The unit and cooling unit (if selected) have a model type plate affixed to the
front.
The model type plate shows the series number and the requisite designations to
identify the unit.
Kodnyckel
Code key
Beteckning
Project name
Ordernummer
Order number
Max. varv
Max. rev.
Tillv. ort
Made in
Tillv. månad
Manuf. month
YYMM
ATER-04-AA-0-00
Modell
Model Envistar Top
TA1 FA1 POS 1
1234-567
– –
VÄXJÖ, SWEDEN
Max. temp. °Cr/m
1805
Art. Nr. 19121-1001
Example of model type plate

Page 8
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
2.4 CE marking and EU Declaration of Conformity
The air handling units and cooling unit (if selected) are CE marked, which means
that upon delivery they conform to applicable provisions in EU Machinery Direc-
tive 2006/42/EC as well as to other EU Directives applicable to the types of air
handling units, e.g. Pressure Equipment Directive PED 2014/68/EU.
As certification confirming that the requirements have been met, we pro-
vide an EU Declaration of Conformity, which is available under Documenta-
tion at ivprodukt.docfactory.com, or under Order Unique Documentation at
docs.ivprodukt.com.
The CE marking applies to units that IV Produkt AB manufactures and supplies
in the form of a unit without additional control equipment. For the CE marking
of IV products to apply, the applicable requirements of the EU Machinery Direc-
tive 2006/42/EC and related directives for control equipment shall be met when
installed for the unit.
0
1
Art. Nr. 19194-0001_01
12 3
180
s
Typical CE label for air handling units
0409
Cooling unit
Order number
Code Key
Model
Name of project
Date of manufacture
PS Max allowable pressure
PT Test pressure
TS Temperature range
Protection level - low
Protection level - high
Refrigerant / Fluid group
GWP
Refrigerant charge Circuit 1
Refrigerant charge Circuit 2
Refrigerant charge Circuit 3
IV Produkt AB
VÄXJÖ, SWEDEN
Contains fluorinated greenhouse gases
covered by the Kyotot protocol.
bar (e)
bar (e)
°C
bar (e)
bar (e)
kg
kg
kg
ton CO2e
ton CO2e
ton CO2e
Typical CE label for cooling units

Page 9
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
2.5 Maintenance
Continuous maintenance of this unit can be carried out either by the person
normally in charge of maintaining the building or through a contract with a well-
reputed service company.
2.6 Handling of refrigerant
The following information summarises the requirements and guidelines for han-
dling the refrigerant used in cooling units. For further information, see the F-gas
Regulation (EU/517/2014 on fluorinated greenhouse gases) and the Swedish
Refrigerant Regulation (SFS 2016:1128). The purpose of the regulations is to
contribute to achieving EU goals for reduced climate impact in accordance with
the Kyoto Protocol.
Operator responsibilities
Generally speaking, the unit operator must:
• Minimise and prevent leakage
• Take corrective action to remedy any leakage that arises
• Ensure that leak inspection, service and repair of the refrigerant circuit are
carried out by a certified refrigeration technician
• Ensure that refrigerant is handled in an environmentally secure manner and
in accordance with national regulations.
By operator, we refer to the European Parliament’s definition: “...the natural or
legal person exercising actual power over the technical functioning of the equip-
ment and systems...”.
The levels for the various actions to be taken for a system are calculated using
carbon dioxide equivalents, CO2e (tonnes). This figure is calculated by multiply-
ing the refrigerant’s GWP value (Global Warming Potential) by the filling amount
in kilos. GWP for R410a is 2088. A filling amount of 1.1 kg R410a therefore cor-
responds to
(1.1×2088)/1000 = 2.30 CO{0>2<0}e(tonnes). Refer to table on page 12.
Leakage inspection and registration
For Envistar Top with cooling unit (ATCR) in size 16-21, with 5 CO2e(tonnes) or
more refrigerant content per circuit, the following applies:
• Leakage inspection must be carried out by a certified refrigeration techni-
cian:
– When installing/commissioning the unit
– Periodically at least once per 12 months,
i.e. no more than 12 months between inspections
– within one month of any work being performed (e.g. sealing a leak, replac-
ing a
component).
• The operator must record events, such as the volume and type of refrigerant
topped up, refrigerant taken into possession, results of inspections and work
done, person and company who carried out service and maintenance.
If the total refrigerant content is below 5 CO₂ e (tonnes), no periodic leak detec-
tion or record keeping is needed, but the requirement for leak inspection during
installation does apply.

Page 10
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
2.7 Extended warranty
In cases in which the equipment delivered falls under a 5-year warranty, in ac-
cordance with ABM 07 with supplement ABM-V 07 or in accordance with NL 09
with supplement VU13, the IV Produkt Service and Warranty Manual is supplied
with the product.
In order to lay claim to an extended warranty, a complete, documented and
signed IV Produkt Service and Warranty Manual must be presented.
2.8 Spare parts
Spare parts and accessories for this unit are ordered from your nearest IV
Produkt sales representative. When ordering, state the order number and
designation. These are stated on a model type plate, affixed to each component.
There is a separate spare parts list for the unit, refer to Order Unique
Documentation at docs.ivprodukt.com.
2.9 Dismantling and decommissioning
When an air handling unit is to be dismantled, separate instructions must be fol-
lowed, see Air handling unit, dismantling and decommissioning under Documen-
tation at ivprodukt.docfactory.com.

Page 11
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
3 Technical description
3.1 Envistar Top air handling unit
Envistar Top with counter-flow exchanger (code
ATEM)
Envistar Top with rotary heat exchanger (code ATER)
Envistar Top is manufactured as a compact unit or modularly, depending on the
size and version selected.
The unit is available in different sizes and in right-hand or left-hand versions. All
units have duct connections in the top (up). The units are equipped with either a
counter-flow exchanger (code ATEM) or rotary heat exchanger (code ATER).
The units are usually supplied with integrated control equipment, but can also be
obtained without control equipment.
* Envistar TOP sizes 04, 06, 10 and 12 with counter-flow exchanger can be sup-
plied modularly.
3.2 Home Concept model
Units with a rotary heat exchanger or counter-flow exchanger in the
Home Concept versions have, among other things, specialised control
equipment such as automatic defrosting. Units with rotary heat exchangers are
also equipped with a pressure balance function for optimal rotor operation.
A filter cabinet for aluminium or carbon filters is available as an optional extra.

Page 12
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
3.3 Cooling unit (code ATCR)
The integrated cooling unit with EcoCooler (code ATCR) cooling recovery
is available as an optional extra in an Envistar Top unit with a rotary heat
exchanger. Cooling recovery means that the heat exchanger starts up when the
extract air/room temperature drops below the outdoor temperature and cooling
is required.
The unit has an electronic expansion valve and refrigerant R410a size 04-12 and
refrigerant R134a size 16-21.
Size Compressor type Refrigerant volume CO2e (tonnes)
04 Rotary compressor 1.1 kg 2.30
06 Scroll compressor 1.7 kg 3.55
10 Scroll compressor 2.1 kg 4.38
12 Scroll compressor 2.38 kg 4.97
16 Piston compressor 5.0 kg 7.15
21 Piston compressor 5.2 kg 7.47
Compressor
Power control takes place with a speed-controlled compressor. When
increased cooling is required, the frequency inverter increases the speed of the
compressor.
Compressor protection
In the event of an alarm initiated by the frequency inverter or the safety circuit,
the compressor stops and an alarm indication is given. If the unit is equipped
with control equipment, the alarm can be read on the Climatix display.
In the event of an alarm, correct the fault and then reset the alarm. If the safety
circuit alarm trips repeatedly, an authorised refrigeration service company must
be called in.

Page 13
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
For size 04-12
The safety circuit consists of a high pressure switch (HP), which protects by trip-
ping when there is high pressure in the system. Use the manual reset button on
the pressure switch to perform a reset.
For size 16-21
The safety circuit consists of a low pressure control and a high pressure switch
with a manual reset button. The safety circuit can trip for two different faults:
• High pressure in the system, HP (manual reset on the pressure switch)
• Low pressure in the system, LP (resets itself automatically)
Cooling function
For integrated control equipment (MX), the cooling unit is interlocked across
the ventilation unit. If any of the fans stop, the cooling unit will also stop. The
interlock and demand signal is sent via Modbus.
For external control equipment (US, UC, MK), the interlock signal must be sent
via a potential-free relay. The demand signal must be sent via 0–10 V.
The cooling unit has internal communication between the frequency inverter and
the expansion valve’s control equipment. Communication takes place through
the Modbus protocol.
Circuit board
The circuit board in the cooling unit is internally prewired and tested at the fac-
tory.
The circuit board contains:
Size 04:
Control centre with integrated expansion valve controller
Size 0 6-12:
• Compressor inverter
• Expansion valve controller
• Contactor
Size 16-21:
• Main switch
• Fuse
• Control unit
• Control unit for expansion valve

Page 14
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
Cooling circuit function
From the compressor, the refrigerant is compressed as hot gas to the condenser, where heat is emit-
ted. The refrigerant condenses from gas to liquid when it is cooled by the extract air.
The refrigerant passes the pressure reducing expansion valve and undergoes a phase transformation
in the evaporator from liquid to gas (the refrigerant evaporates).
Inside the evaporator, the refrigerant absorbs the heat required for phase transformation. The heat is
taken from the supply air which is thus cooled.
The cold refrigerant in gaseous form is drawn back into the compressor, where it is compressed and
thus heated. The gas is also used for cooling the compressor’s electric motor. The refrigerant now con-
tains the heat from the supply air, the compressor’s motor heat and the compression heat.
15
13
14
10
411
2
12
5
6
1
9
7
8
3
1 Compressor
2 Condensor
3 Extract air fan
4 High pressure switch
4 High pressure switch
5 Measurement tapping, high pressure
6 Drying filter
7 Expansion valve
8 Evaporator
9 Supply air fan
10 Measurement tapping, low pressure
11 Low pressure switch
12 Controller
13 Temperature sensor after evaporator
14 Pressure sensor
Flow chart for refrigerant system size 04-12
14
12
13
8
39
11
10
4
1
7
5
6
2
1 Compressor
2 Condensor
3 Extract air fan
4 High pressure switch
5 Measurement tapping, high pressure
6 Drying filter
7 Expansion valve
8 Evaporator
9 Supply air fan
10 Measurement tapping, low pressure
11 Low pressure switch
12 Controller
13 Temperature sensor after evaporator
14 Pressure sensor
Flow chart for refrigerant system size 16-21

Page 15
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
4 Wiring instructions and fuse protection
4.1 MX – Complete control equipment and UC – Complete electrical
connection to terminal (without DUC).
Applies to:
• units supplied prewired with complete, integrated Siemens Climatix control
equipment (code MX).
• units supplied without process unit (DUC) but with sensor and damper ac-
tuator connected electrically to the terminal (code UC). Fans and heat ex-
changers are fused and connected electrically to the terminal. The terminal
connections are positioned at a shared place in the unit. For further con-
nection to an external process unit, we recommend using a multi-conductor
cable.
Safety switch
A safety switch must be fitted and wired on each power supply.
Wiring diagrams
For wiring diagrams for units with control equipment, see the order-unique wiring
diagram supplied with the unit at docs.ivprodukt.com (Control Diagram).
Unit functions, power supply and fuse protection
For recommended fuses, refer to Order Unique Documentation at
docs.ivprodukt.com (Technical Data and Control Diagram), or the product
program IV Produkt Designer.
• Top 04-16 have a shared power supply for all unit functions as standard, but
can be ordered with separate power supplies on special order.
Top 21 have separate power supplies as standard.
• Electric heaters (air heater electric) have a power supply 3x400 V as
standard.
A special coil or a transformer is required for a 230 V power supply.
• Fuses with type C characteristics are recommended.

Page 16
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
Ziehl EC 1×230 V 1.35 kW fan
impeller 031 / 035
Size 10 and 12
INKOPPLING / WIRING
Ziehl 1×230 V - DC
PE
L1
N
Kraftmatning 1×230 V ~ 50 Hz
Power supply 1×230 V ~ 50 Hz
Art. Nr. 19151-0431_00
MX
IVP-styr
IVP Controls
MK
UC
US
Extern styr
External
controls
A (D+)
B (D-)
Brun/Brown
GND
Vit/White
Blå/Blue
E1 +
+
-
GND -
A (D+)
B (D-)
11
14
Styrning 0-10 V =
Control 0-10 V =
RS-485 Modbus
D1
24 V
Brandfunktion
Fire mode
LARM (Bryter vid larm)
ALARM (Opens when triggered)
Ref.
Vit/White
Brun/Brown
Grå/Grey
Rosa/Pink
Gul/ Yell ow
Grön/Green
4.2 MK – Fans and heat exchangers electrically connected to terminal
For units supplied without control equipment but with fans and heat exchangers
connected electrically to terminals (code MK).
Connections to terminal blocks are located on each unit section.
For wiring instructions and recommended fuses, refer to Order Unique Docu-
mentation at docs.ivprodukt.com (Terminal Connection and Technical Data).
Safety switch
A safety switch must be fitted and wired on each power supply.
4.3 HS, US - Without control and without electrical connection
• For units without control equipment and without electrical connection (code
HS), control diagrams are available for the heat exchanger and cooling unit
(code ATCR) at docs.ivprodukt.com, for other connection instructions, see
below.
• For units without control equipment and without electrical connection (code
US), refer to the connection instructions below.
Recommended fuse protection refers to fuses with type C characteristics.
Safety switch
A safety switch must be fitted and wired on each power supply.
Fans (code ELFF)
Ziehl EC 1×230 V 0.50 / 0.78 kW fan
impeller 025 / 028
Sizes 04 and 06
A (D+)
B (D-)
Brun/Brown
GND
Vit/White
Blå/Blue
E1 +
+
-
GND -
A (D+)
B (D-)
11
14
Styrning 0-10 V =
Control 0-10 V =
RS-485 Modbus
D1
10 V
Brandfunktion
Fire mode
LARM (Bryter vid larm)
ALARM (Opens when triggered)
Ref.
Vit/White
Brun/Brown
Grå/Grey
Rosa/Pink
Gul/Yellow
Grön/Green
PE
L1
N
Kraftmatning 1×230 V ~ 50 Hz
Power supply 1×230 V ~ 50 Hz
INKOPPLING / WIRING
Ziehl 1×230 V - BD
MX
IVP-styr
IVP Controls
MK
UC
US
Extern styr
External
Controls
Art. Nr. 19151-0430_00

Page 17
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
Ziehl EC 3×400 V 2.40 / 2.90 kW fan
impeller 040 / 045
Sizes 16 and 21
INKOPPLING / WIRING
Ziehl 3×400 V - DC, DG
PE
L1
L2
Kraftmatning 3×400 V ~ 50 Hz
Power supply 3×400 V ~ 50 Hz
Art. Nr. 19151-0432_00
MX
IVP-styr
IVP Controls
MK
UC
US
Extern styr
External
controls
L3
A (D+)
B (D-)
Brun/Brown
GND
Vit/White
Blå/Blue
E1 +
+
-
GND -
A (D+)
B (D-)
11
14
Styrning 0-10 V =
Control 0-10 V =
RS-485 Modbus
D1
24 V
Brandfunktion
Fire mode
LARM (Bryter vid larm)
ALARM (Opens when triggered)
Ref.
Vit/White
Brun/Brown
Grå/Grey
Rosa/Pink
Gul/Yellow
Grön/Green
Rotary recovery unit (code EMX-P)
Size 04-16
+
–
33
34
36
37
41
42
43
L
N
PE
CONTROL
0-10 V DC
POWER SUPPLY
1×230 V AC
ALARM (CLOSES IN
EVENT OF ALARM)
COOLING RECOVERY
(CLOSED CONTACT
GIVES FULL SPEED)
Rotary recovery unit (EMX-B)
Size 21
+
–
36
35
34
41
42
43
L
N
PE
CONTROL
0-10 V DC
POWER SUPPLY
1×230 V AC
ALARM (CLOSES IN
EVENT OF ALARM)
COOLING RECOVERY
(CLOSED CONTACT
GIVES FULL SPEED)
Air heater Electric (kod ATEE*, ATET-
EV**)
For power supply, output variant and
recommended fuse, refer to Order Unique
Documentation at docs.ivprodukt.com (Technical
Data).
Y
G0
1
2
PE
L3
L2
L2
L1 L1
3
4
7
8
PE
NC
NO
+
–
CONTROL
0-10V=
OPERATION
1×230V~
ALARM (CLOSES
BETWEEN 3-4 IN
EVENT OF ALARM)
POWER SUPPLY
*For unit mounting, selectable for counter-flow exchanger
**For duct mounting, selectable for counter-flow
exchanger

Page 18
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
5 Operation
5.1 Hygiene inspection
Envistar Top conforms to guidelines in VDI 6022 Part 1: Hygiene and Hygiene
Inspections of HVAC Systems.
For this to apply, a hygiene inspection of the system must be carried out and the
system must be cleaned thoroughly as needed before start-up.
For units (code MK, US,UC):
NB:
Pressure surges on filters and air ducts must be prevented through the
design of the duct system and the settings/configuration of the control
system (e.g. soft start of fans, open damper when the fans are in opera-
tion).
5.2 Actions in case of standstill
According to guidelines for hygienic design VDI 6022 Part 1:
In case of prolonged standstill in air treatment systems (more than 48 hours),
it should be ensured that no moist areas can be found downstream from the
cooling coils or humidifier.
In order to avoid the accumulation of moisture – turn off the cooling coils and
humidifier in good time and ventilate the air ducts dry (gradual shut-down). Also,
be sure to set up or program the required functions in the building’s automation/
control system for automatic dry blowing of air coolers and downstream
sections.

Page 19
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
5.3 Commissioning
Envistar Top (code ATEM, ATER) and Envistar Top with integrated EcoCooler
(code ATCR) cooling unti are factory built units that are tested and documented
in the factory.
Commissioning of the unit must be carried out by competent personnel in ac-
cordance with the Commissioning Procedure:
• For Envistar Top (code ATEM, ATER), refer to Commissioning Checklist for air
handling units at ivprodukt.docfactory.com.
• For Envistar Top with integrated cooling unit (code ATCR), refer to Envistar Top
med EcoCooler Commissioing Procedure at ivprodukt.docfactory.com.
The commissioning procedure applies to units that are supplied with control
equipment (code MX).
The validity of the product warranty is conditional on the system having been
correctly commissioned. Working on the cooling unit during the warranty period
without the approval of IV Produkt shall render the warranty void.
Prior to commissioning, the contractor must:
NB:
Wiring of connections and other electrical work may only be carried out
by a qualified electrician or by service personnel recommended by IV
Produkt.
1. Connect the unit to the power supply via a lockable safety switch.
2. Connect the heating/cooling coil, if relevant.
3. Connect the electrical quick-connectors between the unit parts, if relevant
(size 12,16 och 21).
4. Pressure and temperature sensor
5. Connect all ducts.
WARNING!
Rotating fan impeller. The unit must not be energised until all
ducts have been connected.
Follow the troubleshooting instructions in the troubleshooting chart before
contacting a service representative for servicing a unit under warranty. This will
prevent any unnecessary service calls.

Page 20
Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
5.4 Cooling Status – Cooling unit, size 04
With control equipment (code MX).
Status information can be read on the Climatix display (Main menu/Unit/
Cooling).
Information Value Explanation
Cooling unit status Unit ON Normal status for cooling mode if the
compressor is running depends on the cooling
load.
OFFbyALR Switched o caused by alarm.
OFFbyDIN Switched o due to interlock. Climatix interlocks
cooling operation.
OFFbyKey Switched o due to Carel’s ON/OFF menu.
High cond. temp. The compressor’s speed is limited due to high
pressure.
Cooling % Cooling load sent from Climatix to Carel.
Frequency inverter output %
Compr. no Compressor number, 1 x compressor (C1)
Compr. Sum alarm
Alarm management
* * * * * * * *
Compressor_C1 O/On Compressor operating mode.
Suction gas temp_C1 °C Measured suction gas temp.
Evaporating temp_C1 °C Calculated evaporation temp based on low pres-
sure.
Low pressure_C1 bar Relative pressure from low pressure sensor.
Overheating_C1 K Measured overheating.
Expansion valve_1 %Expansion valve position.