Carrier 50EN 480, 50EN 420, 50EH 415, 50EH 420, 50EH 480 Installation, Operation And Maintenance Instructions

INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS

Packaged rooftop units

and separated gas module option

50EN/EH 415-1200

Nominal cooling capacity 92.8 - 287.0 kW

Nominal heating capacity 99.3 - 290.7 kW

Translation of the original document 80049, 12.2018

CONTENTS

1 - INTRODUCTION .................................................................................................................................................. 3

2 - UNIT IDENTIFICATION ....................................................................................................................................... 3

3 - POSSIBLE TYPES OF ASSEMBLIES ................................................................................................................. 4

4 - SAFETY ADVISE ................................................................................................................................................. 5

5 - OPERATION LIMITS............................................................................................................................................ 5

6 - TRANSPORT AND HANDLING ........................................................................................................................... 6

6.1 Centres of gravity ......................................................................................................................................... 7

6.2 Weight overview (kg) .................................................................................................................................... 8

7 - POSITIONING AND INSTALLATION .................................................................................................................. 9

7.1 Choice of location ......................................................................................................................................... 9

7.2 Anchorage for antivibrators ........................................................................................................................ 10

7.3 Recommended service clearance .............................................................................................................. 12

8 - ELECTRICAL CONNECTION ............................................................................................................................ 13

8.1 Installation norms ....................................................................................................................................... 13

8.2 Power supply .............................................................................................................................................. 13

8.3 Wire sizing .................................................................................................................................................. 13

8.4. CARRIERrtc electronic control .................................................................................................................. 13

8.5 Electric panel .............................................................................................................................................. 14

8.6 Location of sensors (2 circuits) ................................................................................................................... 15

9 - FANS AND AIR DUCTS ..................................................................................................................................... 17

9.1 Checks in the axial fans .............................................................................................................................. 17

9.2 Checks in the EC plug-fans ......................................................................................................................... 17

9.3. Checks in the centrifugal fans (optional) .................................................................................................... 17

9.4 Air ducts connections ................................................................................................................................. 18

10 - CONDENSATE DRAIN ....................................................................................................................................19

11 - SAFETY ELEMENTS ....................................................................................................................................... 20

12 - FACTORY OPTIONS AND ACCESSORIES .................................................................................................... 22

12.1 Filters ....................................................................................................................................................... 22

12.2 Hot water coil ........................................................................................................................................... 22

12.3 Electrical heaters ...................................................................................................................................... 23

12.4 Dampers hoods ........................................................................................................................................ 24

12.5 Stop-drop ................................................................................................................................................. 24

12.6 Rotary heat exchanger ............................................................................................................................. 25

12.7 Gas burner. ............................................................................................................................................... 26

12.8 Pre-assembly roofcurb ............................................................................................................................. 26

13 - COMMISSIONING ........................................................................................................................................... 27

13.1 Checks prior to commissioning ................................................................................................................ 27

13.2 Possible problems at commissioning ....................................................................................................... 28

13.3 Operational checks .................................................................................................................................. 28

14 - MAINTENANCE ............................................................................................................................................... 29

14.1 General recommendations ....................................................................................................................... 29

14.2 Servicing .................................................................................................................................................. 30

14.3 access to the main components ............................................................................................................... 30

15 - CONTROL AND ANALYSIS OF BREAKDOWNS ........................................................................................... 33

16 - FINAL SHUTDOWN ........................................................................................................................................ 34

16.1 Shutting down .......................................................................................................................................... 34

16.2 Recommendations for disassembly ......................................................................................................... 34

16.3 Fluids to be recovered for treatment ......................................................................................................... 34

16.4 Materials to be recovered for recycling ..................................................................................................... 34

16.5 Waste electrical and electronic equipment (WEEE) ................................................................................. 34

2

1 - INTRODUCTION

The 50EN/EH range consist of autonomous and compact air-air

units of horizontal design, rooftop type.

They include inside all the components required for providing

the proper air conditioning to the installation.

● 50EN series: Units for cooling operation.

● 50EH series: Units for reversible heat pump operation.

The range of capacities of these units allows the air conditioning

of medium and large surface areas used for business or industry.

The unit is connected directly to an air distribution ductwork

without additional elements or equipment, pipes, cables, etc.

taking no fl oor space at all. This design reduces the cost of

installation, facilitates a quick connection and ensures reliable

operation.

After manufacturing, all units are charged with refrigerant

and are tested at the factory, verifying the correct operation

of all their components within the operating range for which

they are intended.

The units comply with European Directives:

● Machinery Directive 2006/42/EC (MD)

● Electromagnetic Compatibility Directive 2014/30/EU (EMC)

● Low Voltage Directive 2014/35/EU (LVD)

● Pressure Equipment Directive 2014/68/EU (Category 2) (PED)

● RoHS Directive 2011/65/EU (RoHS)

● Eco-design Directive 2009/125/EC (ECO-DESIGN)

● Energy Labelling Directive 2017/1369/EU (ECO-LABELLING)

● Harmonised Standard: EN 378-2:2012 (Refrigerating systems

and heat pumps - Safety and environmental requirements).

Technicians who install, commission, operate and service the

unit must possess the necessary training and certifi cations,

understand the instructions given in this manual and be familiar

with the specifi c technical characteristics of the installation site.

2 - UNIT IDENTIFICATION

Check the unit for any damage or missing components upon

delivery.

Check that the details on the label, the packing and the name

plate match the order.

If equipment has been damaged, or there is a shortfall in delivery,

notify accordingly.

All units bear, legibly and indelibly, a name plate located in a

prime space, as appears in the attached image: Check that this

plate matches the correct model.

1

Producto\Product\Produit

Ref. Produit\Item Nbr

56 7

89 10

11 12

13 14 15 17

Contient des gaz à effet de serre fluorés \ Contains fluorinated greenhouse gases regulated by the Kyoto protocol

Contiene gases fluorados de efecto invernadero regulados por el protocolo de Kyoto

Important: The serial number must be used in all

correspondence regarding the unit.

Markings (name plate, punch marks, labels) must remain visible.

They must not be altered, removed or modifi ed.

Ref\Reference No Serie\serial Nbr.Año\An.Year

Refrig.KG (Fábrica\Factory\Usine)/Co2 Teq.Refrigerant

CARRIER SCS
Route de Thil

01122 Montluel-FRANCE

23

4

Max.Intensidad\Intensité\CurrentKit Elec.Tension\Voltage

16

Fabricante\Fabricant\Manufacturer:
Compañía Industrial de Aplicaciones Térmicas, S.A.
P. Ind. Llanos de Jarata s/n. 14550 Montilla-SPAIN

NoBoPeso\Poids\WeightPSmax(AP\HP) Temp. Max./ IPPSmax(BP\LP)

Legend

1

Year of manufacture

2

Commercial product name

3

Serial number

4

Description of the product

5

Purchase order number

6

Sales order number

7

Work order number

8

Power supply

9

Power output of the auxiliary electrical heaters kit (optional)
(kW)

10

Maximum absorbed current under full load (A) ( including
the electrical kit)

11

Type of refrigerant

12

Refrigerant content (kg) and Environment impact (CO

13

Maximum service pressure in the high pressure side
(R-410A = 42 bar)

14

Maximum service pressure in the low pressure side
(R-410A = 24 bar)

15

Maximum operating temperature (refer to “Opration limits”)

Maximum shipment and storage temperature: +50ºC

Electrical protection rating: IP54

16

Operation weight (kg) (empty weight + fl uid + refrigerant)

17

Notifi ed Body number for surveillance of the Pressure
Equipment Directive

Teq.)

2

3

3 - POSSIBLE TYPES OF ASSEMBLIES

Depending on the indoor airfl ow direction

Mwxy

Assembly

Air supply (0 : standard, 1 : optional, 2 : optional)
Air return (0 : standard, 1 : optional, 2 : optional)
Type of assembly

Legend

I = Air supply
R = Air return
N = Fresh air inlet
E = Air extraction

Standard assembly

 M0 assemblies: Change of supply and/or return air position

in the indoor circuit.

I

M002

R

M012

I

R

I

M022

R

R

I

I

M000

M010

M020

M001

I

R

R

M011

I

R

M021

R

R

 MA assemblies: Axial return and air extraction fan (mixing

box of 3 dampers).

MA00

N

E

I

R

 MC0 assemblies: Electronic lower EC plug-fan (mixing box

MA01

N

I

E

R

MA02

I

N

E

R

of 3 dampers).

MC00

N

E

I

R

 MRC0 assemblies: Lower EC plug-fan (mixing box of 3

MC01

I

R

I

N

MC02

E

N

E

R

dampers) + cooling recovery circuit

MRC00

N

E

MRC01

N

I

E

I

MRC02

N

E

I

I

Assemblies with mixing box and free-cooling

 MS assemblies: Fresh air intake with damper, interlocked

with return damper (mixing box of 2 dampers).

I

MS02

N

R

MS12

I

N

R

I

MS22

N

R

I

MS00

MS10

MS20

MS01

N

I

RI

R

MS11

N

I

R

R

N

MS21

R

I

I

R

R

 MC1 assemblies: EC plug-fan or centrifugal fan in top box

(mixing box of 3 dampers).

MC10

R

N

I

E

R

N

 MRC1 assemblies: EC plug-fan or centrifugal fan in top box

MC11

E

N

I

(mixing box of 3 dampers) + cooling recovery circuit.

N

R

N

MRC10

R

I

E

N

MRC11

R

I

E

N

R

I

 ME assemblies: Axial air extraction fan (mixing box of 3

dampers).

ME00

N

ME01

I

E

RI

R

I

N

E

ME02

R

4

 MWC1 assemblies (models 415 to 960): EC plug-fan in top

box (mixing box of 3 dampers) + rotary heat exchanger.

MWC10

R

N

E

I

E

R

N

MWC11

E

I

N

4 - SAFETY ADVISE

To avoid any risk of accident during installation, commissioning

or maintenance, it is obligatory to take into consideration the

following specifi cations for the units: refrigerated circuits under

pressure, refrigerant presence, electrical voltage presence and

implantation place.

Because of all of this, only qualifi ed and experienced personnel

can perform maintenance tasks or unit repairs.

It is required to follow the recommendations and

instructions in this brochure, the labels, and the specifi c

instructions.

Compliance with the norms and regulations in eff ect is

mandatory. It is recommended to consult the competent

authorities regarding the applicable regulations for

users of units or components under pressure. The

characteristics of these units or components are

included on the plates of characteristics or in the

regulatory documentation provided with the product.

Caution: Before intervening in the unit, verify that the

main power to the unit is cut off . An electric shock can

cause personal damage. The main disconnect switch

is located in the unit’s electrical panel.

The compressor and line surfaces can reach

temperatures above 100ºC causing burns to the body.

In the same fashion, under certain conditions these

surfaces can reach very cold temperatures that can

cause freezing risks.

During any handling, maintenance or service operations,

the technicians involved must be equipped with safety

V-220005

gloves, glasses, shoes, insulating clothing, etc

Natural or propane gas leaks (optional burner)

● Do not operate electric switches or other objects which could

cause sparks.

● Improve the ventilation if located in a closed area.

● Close the gas supply valve.

● Ensure that there is no one in the vicinity of the leak and

request the intervention of installation staff .

Refrigerant

Important: These units contain R-410A, a fluorinated

greenhouse gas covered by the Kyoto protocol.

All interventions on the refrigerating circuit must be performed

in accordance with applicable legislation.

Within the European Union, it is necessary to observe regulation

(EU) No.517/2014, known as F-Gas, over Certain greenhouse

eff ect fl uoride gases.

Components of the R-410A R-32 R-125

Chemical formula

Weight ratio

Unitary global warming potential (GWP)

Global warming potential (GWP)

CH2F2 CHF2CF3

50% 50%

675 3.500

2.088

Ensure that refrigerant is never released to the atmosphere

when the equipment is installed, maintained or sent for disposal.

It is prohibited to deliberately release refrigerant into the

atmosphere. The operator must ensure that any refrigerant

recovered is recycled, regenerated or destroyed.

The operator is bound by the obligation to perform periodical

sealing tests on the refrigerating circuit according to the

regulation (EU) No.517/2014. Please, consult the frequency of

tests in chapter of “Maintenance”.

In case of a leak:

● Toxicity: According to EN 378-1, R-410A belongs to the A1/

A1 group, i.e. with high safety both in the mix and also in the

case of a leak.

● Although it is not toxic, in case of a leak to atmospheric

pressure the liquid phase evaporates. The resulting vapours

are still hazardous because they are heavier than air and

can force the latter out of the machine rooms. If refrigerant is

accidentally released, ventilate the room with fans.

● Although it is not fl ammable, keep them away from open

fl ames (e.g. cigarettes) as temperatures of over 300°C cause

their vapours to break down and form phosgene, hydrogen

fl uoride, hydrogen chloride and other toxic compounds. These

compounds may produce severe physiological consequences

if accidentally inhaled or swallowed.

● To detect leaks, an electronic leak detector, an ultraviolet lamp

or soapy water must be used . Flame detectors do not help.

● Immediately repair any refrigerant leak, using a recovery

unit specifi c for R-410A that avoids a possible mixture of

refrigerants and/or oils.

5 - OPERATION LIMITS

Inlet air conditions Cooling Heating

Indoor coil

Outdoor coil

Minimum

Maximum

Minimum

Maximum

13ºC WB 10ºC

24ºC WB 27ºC

12ºC  -12ºC WB 

48ºC 15ºC WB



With a condensation pressure control operating down to

-10ºC.



When the outdoor temperature is usually below 5ºC WB

it is recommended installing a support element.

5

6 - TRANSPORT AND HANDLING

These machines must be unloaded and positioned by a specialist

handling company using the appropriate, standardised tools.

Before handling, check that the path leading to the installation

location is accessible and free from obstacles.

The unit must be handled with care to avoid transport damage.

Thus we recommend:

- Do not dispose of the pallet or the packaging materials until

the unit is in its fi nal location.

- For transport in a container, one must be selected that has

an easy load and unload to the installation location.

Optionally, the unit may have skids that allow the units to

be slid over the fl oor so that the container would be easily

removable (except with assemblies MC1, MWC1 and MRC1).

These skids make transport pallets unnecessary.

● Discharging to the same plane using skids (optional):

This method will be used only when it is possible to place the

transport box (trailer, maritime container, etc.) at the same

height as the discharging platform (for example, a dock).

To do so, each skid will be gripped by the points indicated in

the previus image, so that it can be pulled from the unit to be

extracted from the box.

Once the unit is discharged, it must be freed from the grips

and the skids so that the inserts available for the silent-blocks

can be accessed. Both are fi xed to the crossbar using M10

screws (hex. key 17).

● Discharge via crane:

A rocker arm, as well as approved cloth slings, both suitable for

the dimensions and weight of the unit, must be used in order

to carry out the work safely and without causing damage to the

units or to workers.

These slings will be hooked to the two grips located on each

crossbar. Make sure that the unit is protected from contact

with the hooks to prevent damage to the housing.

Gripping point

The unit can be discharged using a crane with a rocker arm

and cloth slings by using a forklift truck if it is done on the side

of the transport box. If the unit has transport skids at the same

height of the transport box, the unit can be discharged simply

by pulling on the skids at the points set out for them.

When using any of the three above methods, it is always

mandatory to grasp the unit by the points intended for that

purpose, as described in this chapter.

Any handling of the unit by other means or by gripping points

diff erent from those described here may be dangerous for both

the unit and the personnel who are carrying out the discharging

or transport work.

Always check the weight of the unit and verify that the

discharging method used is approved for handling

that weight.

● Discharge via forklift truck:

The unit is designed to be transported safely by using a forklift

truck. The forks of the forklift truck must come in on the side of

the unit, ensuring that the centre of gravity of the unit remains

within the forks, because a misbalance in the transport may

cause the unit to turn over and fall from the forklift truck.

Note: please see the weight and the gravity centre coordinates

of each model stated in the following page.

The recommended length for the forks will be bigger than the

unit width, so that the entire weight-bearing structure of the

unit can be supported on the forklift truck. This also prevents

the possible introduction of the truck’s fork into functional parts

of the unit that may cause damage to the unit.

The standards and recommendations of the forklift truck

must also be respected with regards to the maximum load,

inclination of the fork carriage, elevation of the load for

transport, and, in particular, the maximum speed.

Skid

Cloth slings with rings

Do not raise any of the units by points outside of
those specifi ed here. In particular, do not raise them
by the traction points of the skids.

The unit must be lifted and fixed with care and without

inclination (maximum inclination 15º), since it could harm its

operation.

The centre of gravity is not necessarily in the middle of the unit

and the forces applied to the slings are not always identical.

Please consult the weight and the centre of gravity of each

model stated in the following page.

After the placing of the unit, it is recommended to remove the

grips as they can be a hindrance for maintenance. Put the

grips back in case of unit transport. The grips are fi xed to the

crossbar using M10 screws (hex. key 17).

Unit with condensates pan in the outdoor circuit:

With the optional condensates

pan in the outdoor circuit, the

units have 2 special grips

(in the outdoor unit), which

project 98 mm on the crossbar,

whereas they preserve the

original grips in the indoor unit.

6

6 - TRANSPORT AND HANDLING

6.1 Centres of gravity

M0 assembly

50EN/EH

415

420

480

485

540

600

650

720

840

960

1100

1200

50EN/EH

415

420

480

485

540

600

650

720

840

960

1100

1200

Centre of gravity

X(mm) Y(mm) Z(mm)

1.449 1.069 810 1.703

2.135 1.056 667 1.926

1.435 1.057 783 1.726

2.107 1.057 665 1.951

2.097 1.060 654 1.950

2.063 1.062 643 1.999

2.135 1.025 783 2.213

2.041 1.028 740 2.264

2.075 1.020 772 2.390

2.081 1.024 764 2.487

2.933 1.097 763 2.998

2.895 1.094 742 3.111

Weight

(kg)

MS assembly MA / ME assemblies

Centre of gravity

X(mm) Y(mm) Z(mm) X(mm) Y(mm) Z(mm)

1.491 1.113 815 1.779 1.528 1.146 799 1.856

2.200 1.104 690 2.019 2.242 1.089 655 2.247

1.477 1.100 790 1.802 1.513 1.132 775 1.879

2.174 1.106 689 2.043 2.212 1.093 652 2.230

2.162 1.107 677 2.042 2.201 1.095 642 2.222

2.127 1.107 666 2.091 2.167 1.095 630 2.319

2.230 1.001 823 2.325 2.239 1.060 771 2.617

2.135 1.099 780 2.377 2.147 1.064 727 2.667

2.172 1.102 821 2.503 2.179 1.056 760 2.790

2.169 1.092 802 2.600 2.186 1.059 753 2.885

2.954 1.094 743 3.131 3.047 1.137 747 3.368

2.994 1.094 758 3.244 3.009 1.133 726 3.481

Weight

(kg)

Centre of gravity

Weight

(kg)

50EN/EH

415

420

480

485

540

600

650

720

840

960

1100

1200

MC0 assembly MRC0 assembly MC1 / MWC1 assemblies MRC1 assembly

Centre of gravity

X(mm) Y(mm) Z(mm) X(mm) Y(mm) Z(mm) X(mm) Y(mm) Z(mm) X(mm) Y(mm) Z(mm)

1.566 1.181 785 1.954 1.528 1.214 764 2.051 1.625 1.119 1.073 2.105 1.528 1.142 1.060 2.173

2.242 1.081 645 2.273 2.170 1.039 628 2.383 2.507 1.156 924 2.459 2.545 1.151 929 2.560

1.552 1.168 763 1.977 1.515 1.200 744 2.074 1.610 1.108 1.047 2.128 1.570 1.131 1.035 2.196

2.212 1.085 642 2.298 2.142 1.043 626 2.406 2.492 1.158 926 2.483 2.531 1.154 931 2.586

2.201 1.088 632 2.297 2.282 1.089 617 2.404 2.472 1.158 910 2.500 2.519 1.153 917 2.605

2.167 1.088 620 2.345 2.256 1.089 605 2.450 2.470 1.148 891 2.542 2.516 1.144 899 2.649

2.239 1.050 758 2.621 2.307 1.054 740 2.772 2.429 1.136 1.065 2.723 2.476 1.134 1.057 2.842

2.147 1.054 715 2.671 2.217 1.058 701 2.828 2.346 1.129 1.019 2.823 2.397 1.127 1.015 2.949

2.179 1.046 747 2.794 2.217 1.051 729 2.965 2.375 1.129 1.032 2.946 2.393 1.127 1.026 3.088

2.186 1.049 740 2.889 2.223 1.054 721 3.071 2.372 1.124 1.029 3.076 2.391 1.122 1.023 3.231

3.047 1.127 734 3.378 3.192 1.126 717 3.587 3.313 1.184 3.378 3.532 3.419 1.178 3.166 3.711

3.009 1.123 713 3.491 3.154 1.123 698 3.700 3.279 1.183 3.403 3.645 3.385 1.178 3.195 3.824

Weight

(kg)

Centre of gravity

Weight

(kg)

Centre of gravity

Weight

(kg)

Centre of gravity

Weight

(kg)

7

6 - TRANSPORT AND HANDLING

6.2 Weight overview (kg)

Weight of the various assemblies (kg)

50EN/EH 415 420 480 485 540 600 650 720 840 960 1100 1200

M0 assembly (standard)

MS assembly

MA / ME assemblies

MC0 assembly

MRC0 assembly

MC1 / MWC1 assemblies

MRC1 assembly

Weight supplement from the main options (kg)

50EN/EH 415 420 480 485 540 600 650 720 840 960 1100 1200

Pre-assembly roofcurb

PCH065

PCH080

Gas
burner
module

Wheel
recovery
module

Water coil (empty)

Supply plug-fan

Supply centrifugal fan

Return plug-fan

Return centrifugal fan (MC1 / MRC1)

Insulation
M0 50mm

Opacimetric fi lters

PCH105

PCH130

PCH160

PCH210

Wheel 1500

Wheel 1800

Wheel 2000

High pressure

Low pressure

Extra low pressure

Extra extra low pressure

High pressure

Low pressure

M0

MC0 / MRC0 / MA / ME

MC1 / MRC1 / MWC1

MS

Burner module

Wheel recovery module

1.703 1.926 1.726 1.951 1.950 1.999 2.213 2.264 2.390 2.487 2.998 3.111

1.779 2.019 1.802 2.043 2.042 2.091 2.325 2.377 2.503 2.600 3.131 3.244

1.856 2.247 1.879 2.230 2.222 2.319 2.617 2.667 2.790 2.885 3.368 3.481

1.954 2.273 1.977 2.298 2.297 2.345 2.621 2.671 2.794 2.889 3.378 3.491

2.051 2.383 2.074 2.406 2.404 2.450 2.772 2.828 2.965 3.071 3.587 3.700

2.105 2.459 2.128 2.483 2.500 2.542 2.723 2.823 2.946 3.076 3.532 3.645

2.173 2.560 2.196 2.586 2.605 2.649 2.842 2.949 3.088 3.231 3.711 3.824

290 385 290 385 385 385 385 385 385 385 475 475

-- 414 -- 414 414 -- -- -- -- -- -- --

-- 440 -- 440 440 440 440 440 440 440 -- --

-- 468 -- 468 468 468 468 468 468 468 -- --

-- 504 -- 504 504 504 504 504 504 504 520 520

-- 555 -- 555 555 555 555 555 555 555 571 571

-- 600 -- 600 600 600 600 600 600 600 616 616

715 880 715 880 880 880 896 896 896 896 -- --

-- 901 -- 901 901 901 917 917 917 917 -- --

-- 928 -- 928 928 928 945 945 945 945 -- --

43 67 43 67 67 67 82 82 82 82 82 82

-- -- -- -- 132 104 41 41 65 65 40 40

-29 -29 -29 -29 -23 -16 -16 -16 -14 -14 -15 -15

-23 -23 -23 -23 -- -23 -23 -23 -23 -23 -40 -40

-- -- -- -- -- -- -- -- -- -- -51 -51

-105 -81 -105 -81 -68 -96 -120 -112 -113 -113 24 24

22 22 22 22 -- 33 33 44 44 44 -- --

-- -- -- -- -23 -23 -- -23 -23 -- -41 -41

-17 -16 -17 -16 -34 -27 -15 -44 2 2 96 96

297 319 297 319 319 319 361 361 361 361 404 404

228 245 228 245 245 245 272 272 272 272 302 302

311 325 311 325 325 325 368 368 368 368 406 406

262 282 262 282 282 282 316 316 316 316 353 353

-- 81 -- 81 81 81 108 108 108 108 124 124

14 17 14 17 17 17 17 17 17 17 -- --

87 84 87 84 84 84 116 116 116 116 137 137

Electrical heaters (kW)

Weight of module (kg)

8

27 36 45 54 72 90

19 24 29 34 48 58

Centrifugal fans (kW)

Weight of motor (kg)

0,75 1,1 1,5 2,2 3 4 5,5 7,5 11 15 18,5 22

10 13 16 21 24 27 40 48 75 94 124 141

7 - POSITIONING AND INSTALLATION

7.1 Choice of location

When choosing the location, whatever may be the selected
fashion, the following precautions have to be taken into
consideration:

● It is mandatory to comply with norm EN 378-3 on Safety and
Environmental Requirements. Part 3: “In situ” installation and
protection to people.

● It is necessary to check that the structure supports the unit’s
weigh (please consult the weight in paragraph “ Weight
overview”).

● The area where the unit will be located must be perfectly
accessible for cleaning and maintenance operations (please
consult the “Recommended service clearance”). Leave
enough space for air circulation around the unit.

● Since the unit is designed to work outdoors, some specifi c
installation norms must be followed:

- The unit will be located on the roof of the premises. If it is

foreseen that it will work more on heating than on cooling, it
is preferable to direct the coil towards the sun. If little work
on heating is foreseen, choose North direction.

- Avoid placing obstacles in the air supply or return. No

obstacle may impede the air aspiration into the coils. Do not
fi x the outdoor coil side in the predominant wind direction.

- Do not install the unit in a closed enclosure or in conditions

that originate air recirculation.

- The chosen location must not fl ood and must be above the

average height the snow reaches in that region.

always in observation of the handling standards that have been
described, below is a proposed assembly sequence that may
facilitate the operation, keeping in mind that the sequence
performed in the installation shall be the one most suitable to th e
solution chosen for each particular case based on the existence
(or lack thereof) of brick frames, type of silent-blocks used, etc.

In the event of assembling directly on silent-blocks to the ground,
it is recommended that a template of the unit’s footprint with the
anchoring points of the silent-blocks be made, as described in
the paragraph “Preparation of the ground”.

With the help of the crane or the forklift truck, the unit will be
raised to a suffi cient height that the silent-blocks can be screwed
into its base. The 4 silent-blocks of the corners must remain
oblique and the interiors perpendicular to the unit.

M12 metric threads have been provided for their placement in
the supports indicated in the following section “Anchorage for
antivibrators”. A hex key 19 or Allen wrench 10 will be used for
this operation based on the type of screw used.

This image shows how
the silent-block option
that can be supplied for
this unit is fi xed to the unit.

Preparation of the ground

It is necessary to ensure that the surface where the unit is going
to be installed in completely fl at. Any defect in the preparation of
the unit support surface translates into stresses on the structure,
which may result in its deformation. The unit must be perfectly
level when installed.

These units can be installed on the fl oor or on a brick curb or steel
profi le. Based on the fi xing solution defi ned in the installation
project, it will be necessary to plan the placement in the base of
threaded rods in the expectation that the unit supports can be
fi xed later on. To do so, it is recommended that a template be
made with the heights corresponding to the fi xings.

Foresee appropriate damping devices in these fi xings
to ensure that noise and vibration transmission
is avoided (refer to the section “Anchorage for
antivibrators”).

Sound Level

These units are designed to work with a low acoustic level. In any
case, the following must be taken into account for the design of
the installation: the outdoor environment for acoustic radiation,
the type of building for the noise transmitted by air, the solid
elements for the transmission of vibrations.

To reduce transmission through solid surfaces to the maximum, it
is very advisable to install shock absorbers between the ground
or structure and the unit frame. If necessary, a study must be
commissioned to an acoustic technician.

Note: Sound levels can be found in the technical brochure of
this series.

Antivibrators assembly (silent-blocks)

Although the installer is the one who must decide on a case-by­case basis the best way to place the unit in the ultimate location,

Preassembly roofcurb (optional)

Optionally, standardised pre-assembly roofcurb made of
galvanised steel panelling with polyester paint and thermally
insulated with adjustable heights can be supplied.

Levelling
system

Important: All of the necessary information for the installation of
these roofcurbs is available in the specifi c instruction brochure
on roofcurbs, No. 12.62 (supplied with the roofcurb).

9

7 - POSITIONING AND INSTALLATION

7.2 Anchorage for antivibrators

50EN/EH 415 to 960

R4

B

R1

R2

M12 (rivet nut)

A

R5

50EN/EH A (mm) B (mm) C (mm)

415 / 480

420 / 960

1.545 2.095 104

2.290 2.095 104

A

R6

C

R3

Reactions in the supports for the various assemblies (kg)

50EN/EH

415

420

480

485

540

600

650

720

840

960

50EN/EH

415

480

420

485

540

600

650

720

840

960

M0 Assembly MS Assembly MA Assembly ME Assembly

R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6

290 417 172 272 399 154 278 423 179 284 429 185 269 432 188 295 458 214 269 432 188 295 458 214

322 476 208 294 447 179 308 483 217 309 484 217 338 543 257 328 533 247 338 543 257 328 533 247

301 426 174 276 401 149 290 432 181 288 431 180 281 441 190 299 459 208 281 441 190 299 459 208

332 481 204 304 453 176 317 488 213 319 491 215 342 538 246 335 531 239 342 538 246 335 531 239

333 480 201 307 454 175 319 488 210 322 491 213 342 535 242 337 530 237 342 535 242 337 530 237

349 492 198 323 466 172 335 500 207 338 502 210 366 558 244 360 553 238 366 558 244 360 553 238

381 557 249 327 503 195 385 594 295 310 520 220 407 645 310 371 609 275 407 645 310 371 609 275

412 569 231 359 516 177 382 571 240 379 568 237 440 655 288 407 623 255 440 655 288 407 623 255

429 604 256 367 541 193 390 600 262 390 600 261 454 689 314 412 648 273 454 689 314 412 648 273

423 598 254 364 539 195 411 627 275 402 619 267 466 711 326 425 671 286 466 711 326 425 671 286

MC0 Assembly MRC0 Assembly MC1 / MWC1 Assemblies MRC1 Assembly

R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6

261 444 199 310 493 248 275 455 186 348 528 259 282 499 256 293 510 267 317 507 222 344 534 249

345 552 262 330 537 247 396 595 272 348 547 224 273 568 326 314 610 367 275 593 352 315 633 391

272 453 201 314 494 243 288 465 188 352 529 253 293 508 257 297 512 261 309 516 243 329 536 263

355 557 256 342 544 244 406 599 266 360 554 221 279 573 324 323 617 368 281 598 350 323 641 393

356 556 253 346 545 242 351 581 285 341 571 275 286 577 321 330 621 365 286 603 350 329 645 392

372 567 249 362 556 238 365 592 283 355 582 273 295 591 330 332 627 367 296 617 358 331 652 394

411 650 315 368 606 271 413 685 352 370 643 309 334 638 346 363 667 375 335 667 377 363 695 405

444 660 292 403 619 251 447 698 329 407 657 289 375 664 337 399 688 361 376 695 369 399 718 392

459 694 319 409 644 269 472 734 348 424 686 300 382 693 361 407 718 385 395 728 385 419 752 409

471 717 331 422 668 282 485 759 362 438 712 314 402 727 378 423 747 399 417 764 404 437 784 425

10

7 - POSITIONING AND INSTALLATION

7.2 Anchorage for antivibrators

50EN/EH 1100 and 1200

R5

A

B

R1

M12 (rivet nut)

50EN/EH A (mm) B (mm) C (mm)

1100 / 1200

Reactions in the supports for the various assemblies (kg)

50EN/EH

1100

1200

R1 R2 R3 R4 R5 R6 R7 R8 R1 R2 R3 R4 R5 R6 R7 R8

326 520 409 252 322 515 405 248 338 538 433 268 332 532 427 262

346 550 415 256 340 544 409 250 343 547 460 285 337 541 453 279

R2

2.027 2.095 104

M0 Assembly MS Assembly

R6

R3

A

R7

A

R8

C

R4

50EN/EH

1100

1200

50EN/EH

1100

1200

50EN/EH

1100

1200

MA Assembly ME Assembly

R1 R2 R3 R4 R5 R6 R7 R8 R1 R2 R3 R4 R5 R6 R7 R8

330 536 475 288 357 564 502 316 330 536 475 288 357 564 502 316

349 567 481 292 375 592 507 318 349 567 481 292 375 592 507 318

MC0 Assembly MRC0 Assembly

R1 R2 R3 R4 R5 R6 R7 R8 R1 R2 R3 R4 R5 R6 R7 R8

334 542 480 293 354 562 500 313 327 533 553 340 347 553 573 361

355 572 487 297 372 590 504 315 346 563 560 345 364 580 578 363

Montaje MC1 MRC1 Assembly

R1 R2 R3 R4 R5 R6 R7 R8 R1 R2 R3 R4 R5 R6 R7 R8

274 465 555 334 343 534 624 403 269 459 618 375 336 526 685 442

290 491 563 338 360 561 633 408 285 484 627 380 353 552 695 448

11

7 - POSITIONING AND INSTALLATION

7.3 Recommended service clearance

50EN/EH units are not designed to have overhead obstruction.

50EN/EH - 415, 420, 480, 485, 540, 600, 650, 720, 840 and 960

2000m m

2 2

1500m m 1500m m

3

1

4

50EN/EH - 1100 and 1200

2

3000m m

2

2500mm

LEGEND

Indoor air coil



Outdoor air coil



Air supply



Air return



Condensates outlet



1500m m 1500m m

5

3

1

5

4

3500mm

12

8 - ELECTRICAL CONNECTION

8.1 Installation norms

Important: All connections in the site are the

responsibility of the installer. These connections are

always made as per the current regulation. Always refer

to the wiring diagram provided with the unit.

The installer must provide electrical circuit protections

according to the eff ective legislation.

V-220005

To prevent electrical shocks, make all electrical

connections before energizing the unit. Check that the

automatic switch is closed. Omitting this can cause

personal damage. Make the ground connection before

any other electrical connection.

8.2 Power supply

Verify that power supply agrees with the unit name plate and

that the voltage remains constant.

Warning: Operation of the unit with an incorrect supply voltage

or excessive phase imbalance constitutes misuse which will

invalidate the manufacturer’s warranty. If the phase imbalance

exceeds 2% for voltage, or 10% for current, contact your local

electricity supplier at once and ensure that the unit is not

switched on until corrective measures have been taken.

Voltage phase imbalance (%)

% imbalance =

Example:

On a 400 V - 3 ph - 50 Hz power supply, the individual phase

voltages were measured with the following values:

AB = 406 V; BC = 399 V; AC = 394 V

Average voltage = (406+399+394)/3=1199/3 = 399.7 i.e. 400 V

Calculate the maximum deviation from the 400 V

average:

(AB) = 406 - 400 = 6 -> % = 100 x 6 / 400=1.5

(BC) = 400 - 399 = 1 -> % = 100 x 1 / 400=0.25

(CA) = 400 - 394 = 6 -> % = 100 x 6 / 400=1.5

Important: It is the responsibility of the installer to protect the

unit from overvoltage coming from the mains or voltage spikes

caused by lightning. Depending on the geographic location

and the type of mains network (buried or overhead), a lightning

rod needs to be installed. Check the local electrical codes and

regulations. Failure to comply with the requirements of standards

in force in the country of installation will void the warranty.

100 x max. deviation from average voltage

average voltage

Moteur

Motor

8.3 Wire sizing

Wire sizing is the responsibility of the installer to suit the

characteristics of the installation site and comply with applicable

regulations.

To perform the electric installation of the unit (cable glands,

wire sizing and their calculations, protections, etc.), refer to the

information provided in:

● The technical brochure of this series.

● The name plate data.

● The wiring diagram included with the unit.

● Norms in eff ect that regulate the installation of air conditioning

units and electrical receivers in the country of installation.

Wiring must be selected based on:

● The maximum power input, taking into account all the options

it features (refer to the technical brochure and the name plate).

● The distance between the unit and its power source.

● The protection to be placed at the power source.

● Neutral operating conditions.

● The electrical connections (refer to the wiring diagram

provided with the unit).

● The temperature the wiring is exposed to;

● The fi tting method.

After wire sizing has been completed, the installer must verify the

appropriate means of connection and defi ne any modifi cations

necessary on site.

Power cable access routing

The power cables can be routed into the electrical box for the

units:

● Via the panel located under the electric panel.

● Via the base of the unit

It is important to check that the power cable bend radius is

compatible with the connection space available inside the

electric panel.

8.4. CARRIERrtc electronic control

The CARRIERrtc control is basically composed of a μPC

MEDIUM control plate, a pGD1 graphical terminal, a TCO user

terminal (optional), and sensors.

Please refer to this control brochure to obtain more detailed

information about its operation.

pGD1 terminal:

This terminal, installed in the electric panel of the machine,

allows for:

● The initial programming of the unit.

● The modifi cation of the operating parameters.

● Stopping/starting the unit.

● The selection of the operating mode.

● Setting the setpoints.

● The on-screen view of the controlled variables and the values

measured by the sensors.

● The on-screen view of the description of the active alarms

and the alarms log.

13

8 - ELECTRICAL CONNECTION

TCO user terminal (optional):

This terminal can be installed on the electric panel, instead of

pGD1 terminal. In this case, the remote connection of the pGD1

terminal is posible.

Optionally, these units can change the electronic control to

CARRIERrtc medium (available for models 415 to 720). This

control is fi tted with the TCO terminal as standard, and the pGD1

terminal as an option. Consult the technical brochure.

Note: for more detailed information on these controls, please

refer to their brochures.

Customer connection

8.5 Electric panel

All units include a fully wired electrical panel, with forced

ventilation.

The access door is insulated to prevent condensation. This door

has hinges + quarter-turn latches.

These latches of stainless steel have triangular

insert 8 mm (supplied wrench). The closing is

done by rotating 90º (anti-clockwise): it brings

the latch to the locked position.

Position of the electric panel in the units

● Models 650 to 1200 include two fully wired electric panels:

- a main panel to which there is an electrical power supply,

- an auxiliary panel in which the optional elements of the

indoor circuit are connected.

Note: all models have a plug of 230 Vac in the main electric
panel.

50EN/EH - 415, 420, 480, 485, 540 and 600

No. 50EN/EH 415 to 1200

Main power

1

supply

Remote connection of pGD1

2

terminal (by default installed
on the electrical cabinet)

Connection of TCO user

3

terminal on the electrical
cabinet (optional)

4 Remote off /on (optional) 2 wires

5 General fault signal (optional) 2 wires

Circulation pump signal for

6

HWC (antifreeze sec.) (opt.)

Ambient

7

probe

8 Air quality sensor (opt.) 3 wires

400 III (±10%)





NTC (std) 2 wires

RS485 (opt.)

3 wires + ground

telephone cable 6 wires standard

(RJ12 connector)

2 wires for power supply 230V + 1

shielded cable for communication

type AGW20 / 22 (1 braided pair

+ drainwire + shielding)

1 wire

5 wires



Electric power supply inputs

50EN/EH - 650, 720, 840, 960, 1100 and 1200

Main panel

Main panel

Auxiliary panel

 In this case, it´s posible to install the TCO terminal on the electrical cabinet.
 It’s necessary that the terminal uses the same power supply that the

control board.

 Up to four RS485 ambient sensors can be connected in series on the

fi eld-bus of the control board.

14

Electric power supply inputs

8 - ELECTRICAL CONNECTION

p

)

8.6 Location of sensors (2 circuits)

B2

Outdoor temperature probe

Outdoor fan

Outdoor coil

B7
Press. transducer
in the outdoor
coil cir. 1

Indoor coil

CIRCUIT 1 CIRCUIT 2

Reversing
valve
(heat pump)

Discharge T
klixon switch

Compressor

Low pressureHigh pressure

B3

Supply
air probe

Indoor fan

Fresh

air

B4

Mixing
probe

Extraction

B1

Return air probe

B5

Ambient air probe

B10

Air quality

robe (opt.

Note: If the unit needs the outdoor humidity probe (used with

enthalpic or thermoenthalpic free-cooling), this one will be

connected in B5 in the place of the NTC ambient probe. In this

case it is necessary to use a RS485 ambient temperature probe

connected on the Field-bus.

The outlet probe (B3) and the mixing probe (B4) can be replaced

by RS485 enthalpic probes for calculation of the cooling and

heating capacities (optional).

Outdoor fan

Outdoor coil

Press. transducer

Indoor coil

Compressor

Low pressure High pressure

B12

in the outdoor

coil cir. 2

Reversing
valve
(heat pump)

Discharge T
klixon switch

● Fasten the rear of the sensor case to the panel or the wall (for

fastening the case, use the screws supplied with the fastening

kit, paying attention to use the proper spacers, to not damage

the sensor’s electronics).

● This probe must be fastened to the panel or the wall of the
room to be conditioned, at ca. 1.5 m height.

● Close the sensor with the top cover by pressing lightly.

Electrical connection

● Make the electrical connection according to the unit
confi guration:

- NTC probe (B5 - connector J3) : with 2 x 1,5 mm

2

section

cable, within a maximum distance of 30 meters.

- 1 to 4 RS485 probes of temperature or temperature+

humidity (connector J10): with AWG20 section cable, single
braided pair preferably shielded with drain wire + Power
supply 24 Vac (2 wires).

Note: in the case of more than one probe, connection of the
probes in series, in the RS485 network. Please, refer to the

CARRIERrtc control manual.

Connection of the outdoor humidity probe (optional)

The outdoor humidity probe (optional on B5 - connector J3),

necessary for the enthalpic and thermo-enthalpic free-cooling,

must be installed on-site, on the hood of the fresh air intake.

● Open the case by turning the top cover anticlockwise (fi g1).

● Fasten the rear of the sensor case to the side panel of the

hood (use the screws supplied together with the probe) placing

the screws in the holes provided (fi g.2).

● Make sure that the screws that hold the board protective cover

are fastened tightly (fi g.3).

● Close the sensor by turning the cover clockwise (fi g.4).

8.7 Sensors connection by the costumer

The client must connect on-site the following probes:

● Ambient NTC (standard) or RS485 (optional).

● Air quality (optional).

● Outdoor humidity (optional).

These probes are supplied inside the main electric panel of the

50EN/EH unit.

Please refer to the wiring diagram and the CARRIERrtc

control brochure, both provided with the unit.

Connection of the ambient probe

● Open the case using a fl athead screwdriver in the slot, paying

extra care not to damage the electronic parts.

(fi g.1)

(fi g.2)

(fi g.3) (fi g.4)

15

8 - ELECTRICAL CONNECTION

Then the electrical
connection of the probe
should be made.

The installer only has to
insert the cable through
the feedthrough for
wiring it in the PVC box
located inside the unit,
next to the servomotor.

● It should never be mounted:

- On outside walls.

- In niches or behind curtains.

- Above or near heat sources or shelves.

- On walls covering heat sources such as a chimney.

- In the radiation range of heat sources and lighting bodies
e.g. spotlights.

- In areas exposed to direct solar radiation.

Duct-mounted

This version can be connected to the air duct in these two ways:

The position of the
terminal box depends
on the assembly
selected for the unit.

Connection of the air quality probe

Installation in the environment

● This probe must be fi xed to the interior wall of the room to be
conditioned, at ca. 1.5 m height in the room and at least 50
cm from the next wall.

±0.3

90

mm

±0.11

“

3.54

Ø > 13mm

Ø > 0.51“

5mm

0.2“

19mm

0.75“

M16x1,5

Ø > 16mm

Ø > 0.63“

60

2.36

±0.3

mm

±0.11

“

6mm

0.24“

Electrical connection

This CO

probe (S13) is confi gured as analogue output 4…20

2

mA (0..2000 ppm), in the analogue input B10 of the control
board (connector J18).

Recommended cable section : 1,5 mm

2.

Environment: Duct-mounted:

Electric

panel

B10 (J18)

22

21

23

S13

+V

1

2

GND

3

RH

4

T

5

CO2

6

GND

Electric

panel

22

21

23

B10 (J18)

1

2

3

4

5

6

7

S13

+V
GND
GND
CO2
NC
Tpassive
Tpassive

16

9 - FANS AND AIR DUCTS

9.1 Checks in the axial fans

● Before commissioning, check the blade rotation direction and

that the axis turns without strokes nor vibrations.

● Once running, check the operation conditions: pressures,

fl ows and consumptions.

● With electronic fans (standard), check that they adapt their

rotational speed based on the condensation or evaporation

pressure.

Note: Optionally these units can be supplied with two-speed

fans. Models 840 to 1200 do not comply with ErP regulation

(only for countries outside the European Union).

● Closing mode:

First rotate 90º (anti-clockwise): closing brings

the latch to the locked position. The door

cannot be opened.

9.3. Checks in the centrifugal fans (optional)

If the unit is equipped with centrifugal fans for the supply and/

or return air:

● Before commissioning, check the blade rotation direction and

that the axis turns without strokes nor vibrations.

● Once running, check the operation conditions: pressures,

fl ows and consumptions.

● The overlapping of characteristic curves of the fan and the

room is very important, so that the fl ows and pressures

provided to the duct network are as required.

9.2 Checks in the EC plug-fans

● Before commissioning, check the blade rotation direction and

that the axis turns without strokes nor vibrations.

● Once running, check the operation conditions: pressures,

fl ows and consumptions.

● The coupling of characteristic curves of the fan and the room

is very important, so that the fl ows and pressures provided to

the duct network are as required.

● The variable-speed plug-fans, both supply and return, have a

fl ow control pressostat. This pressostat comes from the factory

adjusted to the indicated fl ow. However, the fl ow for diff erent

conditions can be readjusted on site from the pGD1 graphic

terminal (please refer to the CARRIERrtc control brochure).

Note: The centrifugal supply fans do not comply with ErP

regulation (only for countries outside the European Union).

● Soft starter detail (optional):

The soft starter of the outlet fan extends the time to reach its

regular speed. This is mainly intended for installations with

fabric ducts however is always compulsory with motors with

an output of 15 kW and higher.

For motors up to 15 kW it is installed in the factory in the

relevant auxiliary or main electric panel (according to the

model). For larger motors it is installed next to the ventilation

group.

Motor output up to 15 kW Motor greater than 15 kW

Note: the access panel to the supply fan(s) is fi tted with hinges +

quarter-turn latches of stainless steel and triangular insert 8 mm.

Starter

17

9 - FANS AND AIR DUCTS

Pulley and belt calibration

Attention: Before performing these operations, it is

necessary to verify that the unit is disconnected from
mains.

The centrifugal motorfans are coupled through pulleys and belts.
In these fans, the following must be taken into consideration:

Pulley alignment:

● The pulleys must be on the same plane, so it is important to
check them with the help of a ruler or a laser aligner.

● In case they are not aligned, remove the pulley screws, and
after removing the taper pin, the set of pulley and taper can
be slided over the axis (this action can be performed both in
the motor as well as in the fan).

Pulleys must stay on the same plane

Tensor
screw

- e = pulley centre distance in mm

- E = see table below for the value

- f = force applied

● At the centre of the centre distance “e”, apply a force “f”, as
determined in the table below, to each belt. Set the belt tension
to obtain the calculated defl ection “Ea”.

Belt type

SPZ 25

 d (mm)  E (mm) 

f(N)

56 ≤ 71 2.45

< 71 ≤ 90 2.20

< 90 ≤ 125 2.05

125 1.90

 Load to be applied per belt f (N)

 Small pulley diameter (mm)

 Belt deformation for a pulley centre distance of 100 mm - E (mm)

Important: During commissioning, the belt tension
must be checked after 48 hours of operation.

The belt tension must be checked in all cases and
before system start-up.

Pulley
screws

Taper pin

Belt tension:

After fi xing the pulleys on the same plane, the belt tension is
made by tightening the tensor screw.

Excessive tension on the belt can lead to premature wear on
the assembly. Insuffi cient belt tension can cause slippage,
overheating and premature wear of the belt.

It is essential to tension the belts using the “Defl ection test”
described below:

● The belt tension must be checked and corrected using a
suitable measuring instrument (tensiometer or dynamometer).

● “Ea” calculation:

- Ea = (e x E)/100 = deformation in mm for a pulley centre

distance of 100 mm

9.4 Air ducts connections

The air supply and return ducts must be calculated in accordance
with the nominal fl ow and the unit’s available pressure (refer to
the technical characteristics table).

The duct calculation and design must be made by qualifi ed
technical personnel.

It is advisable to take into consideration the following
recommendations:

● Curves in the fan supply outlet(s) must be avoided. It is
recommendable to have a straight section of duct measuring
approximately 1 metre. If it is not possible, they must be as
smooth as possible, using indoor defl ectors when the duct is
of large dimensions.

● When making the ducts, direction sharp changes must be
avoided since they can generate occasional pressure drops,
which aff ect the available pressure and the fl ow. The location
of discharge and aspiration grilles must be studied carefully to
avoid the air recirculation and the transmission and generation
of noises to the interior.

● Consideration should be given to the need to install fi lters
on the return ducts, taking into account any particles in
suspension existing which could settle inside the machine
(e.g. textile fi bres).

● Flexible connections must be made between the ducts and
the unit that avoid the noise and vibration transmission.

● No matter the type of ducts used, they must be isolated and
not be composed of materials that propagate fi re nor expel
toxic gases in the event of a fi re. The internal surfaces must
be smooth and should not pollute the air that circulates within
them. In any case, the eff ective legislation about this issue
must be respected.

18

10 - CONDENSATE DRAIN

All models are equipped with a condensate drain pan in the

indoor circuit, with a bronze, gas threaded 1 1/4” M drain junction.

Outdoor circuit
pans (optional)

With outdoor temperatures which are lower than 0ºC

the necessary precautions must be taken to prevent the

water in the drain ducts from freezing.

In units where the outdoor condensates pan is optional, the
outdoor circuit drain (junction 1” M) is independent from the
indoor circuit drain. Do not connect both drains.

Important: the water drain pipe must be provided with a siphon

to avoid bad smell and water spills.

CONNECT SIPHON

METTRE SIPHON

PONER SIFON

Siphon installation norms

● Check that the condensate outlet is not clogged.

● Perform the assembly as per the scheme of the attached

starting diagram:

● Pan in overpressure:

It is installed to avoid the access through the drain piping of

bad smells.

● Pan in underpressure:

Besides the previous application, water must be sucked from

the pan:

- For the correct siphon design, the “A” height must be at

least twice that of the underpressure (mm.w.c) where the

condensate pan is placed.

- The drain piping must be slightly sloped to ease circulation

towards the drain.

- The original diameter of the piping must be respected. No

reduction can be made.

V220014

Indoor circuit
condensate
drain pan

Outdoor circuit
condensate drain
pan (optional)

Some options have their own pan with independent drain

junction, gas threaded:

● Cooling recovery circuit: 3/4” M in bronze.

● Rotary heat exchanger: 1” M in bronze.

● Gas burner: consult in the specifi c instruction brochure of

burners Nb 09.100 (supplied with the burner).

Condensates pan

in depression

Check the connection watertightness.

A

A

Siphon drain

Slight slope

5/1000

To drainage

19

11 - SAFETY ELEMENTS

Low pressure pressostat

When connected to the compressor suction, it will stop its

operation when the pressure at that point goes down below the

tare value (caused by obstructions in the circuit, excessive dirt

in the fi lters, fan stop or ice formation in the evaporator).

This pressostat disconnects at 2 bar and is automatically

reactivated.

High pressure pressostat

Connected to the compressor discharge, it will stop its operation

when the pressure at that point reaches the setpoint. It

disconnects at 42 bar and it is automatically reactivated.

Magnetothermals for line protection

They are located at the beginning of the power lines for the

compressors and motor fan(s) to protect them.

Safety at the compressor

Temperature probe for the discharge from the compressor to

protect the unit with discharge temperatures greater than 135ºC.

Condensation and evaporation pressure control

This safety device, integrated in the control, enables managing

the outdoor fans when the units are working in cooling mode with

low outdoor temperatures (condensation control) or in heating

mode with high outdoor temperatures (evaporation control). This

aids the unit’s operation in all the seasons.

In the case of EC electronic fans, such as those that are found in

these units by default, speed control will be proportional based

on the average pressure measured by the pressure transducers

in the outdoor coils.

Anti-fi re safety

The electronic control can activate an anti-fi re safety device that

detains the unit when the return air surpasses a temperature

of 60°C (by default).

It cannot return to operation until the temperature has dropped

to below 40ºC.

Smoke detector (optional)

In accordance with standard NF S 61-961, this smoke detection

station uses a LED to indicate the installation status, and if the

probe detects the presence of smoke in the installation, it stops

the operation of the unit.

The station is installed in the factory in the main electric panel

or in the auxiliary electric panel (depending on the model). The

probe is placed on a pillar next to the supply fans.

Main door switch

By using a mechanical device, it impedes access to the electric

panel when the unit is with voltage.

Automatic switch in the control circuit

Magnetothermal switch that protects the operation circuit against

continuous surges as well as against high currents of short

duration (short circuits).

Defrost control

This safety device is intended to eliminate ice which could

accumulate in the outdoor coil when the unit is working in the

heating cycle. Defrosting is carried out by the control depending

on the value measured by the sensors on the outdoor coils and

the time set between defrosting operations.

Air inlet tube

Smoke detecting station Smoke detecting probe

Control of air fl ow

- The supply plug-fans (standard) adapt their speed to the

average fl ow measured by the diff erential pressure sensor

and the value set as a setpoint in the electronic control.

- For those units with centrifugal supply fans (optional), a

diff erential pressostat can be incorporated in order to measure

the variation in air fl ow. This pressostat allows the detection of

fan belt breakages, since the fan relay only detects operating

faults that have arisen in the motor. This pressostat is installed

in the factory in the main electric panel or in the auxiliary

electric panel (depending on the model). This safety device

is mandatory for units with electrical heaters and with gas

burners if the unit does not have the supply plug-fans.

20

11 - SAFETY ELEMENTS

Clogged fi lter detector (optional)

Diff erential pressostat for detection of the fi lter clogging level.
The value for alarm signalling is set in factory, depending on
the fi lters selected for the unit.

The electronic control allows the settings selection for the
clogged fi lter alarm: only indication (by default) or unit stoppage.
Manual reset.

Pressure reading is done thanks to two intakes within the air
fl ow before and after the fi lter, such that a comparison is made
between the pressure of the inlet air
to the fi lter (positive) and the supply
air of the same to the other side of the
evaporating coil (negative).

This safety device is particularly
recommended with gas burner.

+

This pressostat is installed in the
factory in the main electric panel or in
the auxiliary electric panel (depending
on the model).

_

Remote alarm (optional)

CARRIERrtc control allows the management of a relay for
remote alarm signalling.

Refrigerant leak detector (optional)

The gas detector sensor is a device that signals leaks in
refrigerant.

When the loss of a certain concentration is detected, the sensor
sends the alarm to the control, which stops the unit and locally
activates a acoustic and visual signal.

This off ers the advantage of acting immediately to gas leaks,
guaranteeing the safety of persons who are in the proximity
thereof. Its installation complies with European regulations
F-GAS, EN378, and ASHRAE 15.

This sensor is installed next to the supply fan. In case of alarm,
it is reset manually.

Anti-freeze protection for low outdoor temperatures

(opcional equipment for GREAT COLD)

● Electrical heater for protecting the components of the electric
panel. This safety device is mandatory for an outdoor
temperature lower than -8°C WB. A reinforced electrical heater
is mandatory for a temperature lower than -16°C WB.

The electrical heater(s) is(are) activated when the thermostat

installed inside the electric panel detects that the temperature

drops below 5°C.

● Compressor with low-temperature protection using an
additional crankcase heater: mandatory for an outdoor
temperature lower than -8ºC WB.

Activation temperature: -8ºC WB.

● Dampers for the mixing box (optional) with springs for
automatic closing in the case of a cut in power. Mandatory
for an outdoor temperature lower than -8ºC WB.

Activation temperature: -8ºC WB.

● Electrical heater for anti-freeze protection of the mixing box
dampers (optional): mandatory for an outdoor temperature
lower than -12ºC WB.

Activation temperature: -12ºC WB.

● Hot water coil circuit (optional) with anti-freeze technology
based on the water temperature: mandatory for an outdoor
temperature lower than -20ºC WB.

This protection is made up of a circulation pump as well as

two probes inserted in the input and the output of the coil

Operation of the pump with GREAT COLD:

- Antifreeze protection: if the water temperature in the coil

drops below 4ºC, the control activates the pump and the
3-way valve opens to 100%. The pump stops when 7°C are
reached.

- Safety of minimum outdoor temperature: if the outdoor

temperature drops below 4ºC, the control activates the pump
and the 3-way valve opens to maintain, in the water coil,
a water outlet temperature of 10ºC in ON operating mode
and 15ºC in OFF operating mode.

21

12 - FACTORY OPTIONS AND ACCESSORIES

12.1 Filters

All model types can substitute the fi ltering mesh that the units

include regularly with G4 rating, mounted on the same frames.

Creased opacimetric fi lters classifi ed M6 to F9, as well as double

stage F+F creased opacimetric fi lters, can also be added.

● Assembly inside the unit. The inlet/outlet connections of the

hot water coil are located inside the unit. The connection can

be established via the unit base using fl exible piping or via

the side panel.

In the diagram below the position of the sheet metal precuts

is shown on the side panel.

2

1

C

B

A

LEGEND

1

Water outlet

Water inlet

2

Creased opacimetric fi lters Gravimetric fi lters

Note: The access panel to the fi lters is fi tted with hinges +
quarter-turn latches of stainless steel and triangular insert 8 mm.

● Closing mode:

First rotate 90º (anti-clockwise): closing brings

the latch to the locked position. The door

cannot be opened.

12.2 Hot water coil

● Hot water coil with a three-way valve managed by the

electronic control of the unit. The water coil could be activated

in the following cases:

- As a support in HEATING mode, as the fi rst stage or

subsequently with the input of all the available compressors.

- As support in HEATING mode in accordance with the outlet

temperature.

- During the defrosting operation if selected as support.

- With the unit running or shut down if an anti-freeze alarm

is triggered.

- With the unit stopped when the outdoor temperature drops

below 4ºC. In this case the circulation pump of the water

circuit will be connected.

- As support in COOLING mode in accordance with the return

and the oultlet temperatures.

The pump of the water circuit has to be activated whenever

the 3-way valve is switched on. It is the installer’s responsibility

to connect the pump to the electronic control, except with the

factory-installed GREAT COLD option. Consult the electrical

scheme supplied with the unit.

Note: Refer to the operation mode of the pump with the

GREAT COLD option in the chapter “Safety elements”.

50EN/EH

415 / 420 / 480 / 485 / 540 / 600

650 / 720 / 840 / 960

1100 / 1200

A

(mm)B (mm)C (mm)

302 250 222 2”

302 250 222 2”

302 250 222 2 1/2”

Ø hydraulic

connections: I/O

● Coil fi lling:

- The coil fi lling must be made with the bleeder valve open

until water runs through it, which is when it is time to close it.

- Cut off the water supply and let the bubbles generated go

up to the highest coil point, which is the same as the bleeder

valve, and eliminate by opening the purger.

- Pour more water into the circuit and repeat the previous

steps.

- Activate the water pump (to be foreseen by the installer)

and repeat the previous steps until no air noises are heard

in the piping, which is when the fi lling of the installation will

have been fi nished successfully.

● In case of long unit stops, and forcibly if they happen in the

winter season, the coil must be emptied.

● To prevent the water from freezing, with this option the unit

always has an anti-freezing thermostat. Add glycol to the water

if necessary. With the GREAT COLD option, it is necessary

to consult for glycol percentages higher than 20%.

● The direction of the water fl ow must be correct and so the

following indications must be observed:

HOT WATERCOIL

BATTERIE D’APPOINT

BATERÍADE APOYO

HOT WATERCOIL

BATTERIE D’APPOINT

BATERÍADE APOYO

Note: The hot water coil is not compatible with the stop-drop in

the indoor air coil.

22

12 - FACTORY OPTIONS AND ACCESSORIES

12.3 Electrical heaters

● The auxiliary electrical heaters are ready for operation in two

power stages. This heaters are managed by the electronic

control of the unit that can activate them in the following cases:

- As support in HEATING mode, following the input of all the

available compressors.

- In HEATING mode, instead of compressors.

- During the defrosting operation if selected as support.

- As support in COOLING mode in accordance with the return

and outlet temperatures.

● Assembly and connection inside the unit. The electrical heaters

acquired with the unit will be incorporated to it modifying the

electric panel in the factory, so that it is compatible with the

electronic control.

● The electrical heaters requested for units already shipped will

be sent in a kit, and the installer will need to assemble the

necessary elements for the operation of the unit to assemble

and for the compliance with the legal regulations that are

applied to the modifi ed unit in terms of safety.

Note: Consult the available capacities in the technical brochure.

Kit assembly:

To attach these frames to the unit, four supports are provided.

In the case of 2 frames, screw each one of them to 2 supports

with the 4 Allen M4 screws included in the kit.

The height of the frame on the support will depend on the position

of the discharge, since it should never be behind the fan volute.

For example, in the following diagram, the frame location will

be valid for lower and side discharge.

Step 2: attach the supports with the frames linked inside the

unit. To that extent, drills have been made in the unit to which

the supports must be screwed.

Supports attached to the unit

When the frame with the electrical heaters is provided in a kit,

follow the steps below for connecting it:

Step 1: the resistors are sent divided into 1, 2 or 4 frames,

depending on the required power, as shown in the following

table:

Output (kW)

Stages (kW)

No. of frames

Safety thermistor
location

Holes for M4
screws for
attaching to the
unit

Electric power
supply outlet

27 36 45 54 72 90

9 + 18 18 + 18 18 + 27 27 + 27 36 + 36 45 + 45

122244

Holes for screws M4 for

attaching to the unit

Supports
attached to
the unit

Access panel

Supports for
attaching to the
unit

Holes for M4
screws for
attaching to the
unit

Step 3: Take the hoses with the electric power supplies to the

main electric panel of the unit. On the wiring diagram supplied

with the unit an illustration is included with the implantation in

the platen of all the components.

Important: The connection of the necessary elements for the

adequacy to the operation of the unit must be performed by the

installer. The kit is supplied with the required electric material:

thermistors, contactors, hoses, etc.

23

12 - FACTORY OPTIONS AND ACCESSORIES

12.4 Dampers hoods

The fresh air and exhaust air damper hoods (depending on the

assembly chosen) are supplied disassembled. The installer have

to assemble them on site, and then, attach them to the unit.

The three parts that make up the visor (1), (2) and (3) are joined

by self-tapping screws (supplied with the unit).

The upper grip of the hood must be inserted below the panel of

the upper box or the lid in order to prevent water from entering.

Each hood is attached to the unit with Allen M4 screws (supplied

with the unit).

1

3

2

12.5 Stop-drop

The stop-drop can be installed in the indoor air coil and on the

fresh air intake.

● Indoor air coil (available

for models 415 to 960 and

included in models 1100

and 1200): recommended

in cases where a high

moisture content in the air

is foreseen or when the air

fl ow is high.

Note: The stop-drop in

the indoor air coil is not

compatible with the hot

water coil.

This optional is easily

removable from the side of

the unit.

Stop-drop in

the indoor coil

● Fresh air intake: the frames with the stop-drop have to be

placed after the hood (both supplied separated from the unit).

1

3

2

The frames must be inserted behind the top fl ap of the hood,

and then, they must be dropped over the rail.

Top fl apRail

24

12 - FACTORY OPTIONS AND ACCESSORIES

12.6 Rotary heat exchanger

The rotary heat exchanger, available for models 415 to 960,

consists of a module attached to one side of the 50EN/EH unit

(MWC1 assembly).

● This module incorporates washable fi lters in the fresh air
intake and in the output of the extraction air. Optionally, they
can be replaced by G4 or G4 with low pressure drop.

● The MWC1 assembly can be supplied, in option, with a speed
drive for the wheel which avoids the risk of icing on the wheel
during the defrost operation.

Handling and transport

● Both the recovery module and its curb are supplied separately
from the machine. The curb must be fi xed to the module using
4 screws M8, in the points indicated in the following image.

● The module can be handled with a forklift truck. For this
purpose, the module base incorporates 2 guide rails in which
the truck’s fork will be inserted to prevent any sliding.

Weight and centre of gravity of module + curb:

The set of module + curb must be lifted and fi xed with care and
without inclination (maximum inclination 15º). Please consult
the coordinates of the centre of gravity and the weight in the
attached table.

50EN/EH

415 / 480

420 / 485
540 / 600

650 / 720
840 / 960

Wheel

confi guration

 1500, Aluminium

Cross section: 1,7mm

 1800, Aluminium

Cross section: 1,7mm

 2000, Aluminium

Cross section: 1,7mm

Centre of gravity of

module + curb (mm)

XYZ

987 418 1594 751

1297 393 1163 901

1296 396 1438 945

Weight

Attachment of the recovery module to the machine:

The attachment is made using the profi les that incorporates the
module at the two sides and at the top. The module is secured
using M6 Allen screws (supplied with the unit).

Profi les for the attachment of the module

Z

Y

X

Guide rails
for forks

Lifting holes

for slings

● For the transport and lifting to the roof using a crane cloth
slings with rings will be used, with the appropriate resistance,
separated by a strut to avoid damaging the casing.

These slings will be hooked onto the four lifting holes
availables on the base of the module.

Condensate
drain 1”M

The installer must also place the damper hoods. To do this,
follow the steps described in paragraph 12.4.

Note: the access to the inside of the module can be found in the
chapter “Maintenance”.

Electrical connection to be made by the costumer:

For the electrical connection of the module, the cable located in
the interior of the 50EN/EH unit must be connected in the box
located inside the module.

Note: see the wiring diagram included with the unit for a more
detailed information about the wiring.

It is mandatory to make all electrical connections

before energizing the unit.

25

12 - FACTORY OPTIONS AND ACCESSORIES

12.7 Gas burner

● Natural gas or propane gas burner with proportional actuator

0-10V designed in accordance with the standards in force in

compliance with the Gas Directive 90/396 EEC.

EC certifi cation: 0694CP1457.

● The electronic control of the 50EN/EH unit will only be

managed by the burner connection as support for the heating

depending on ambient conditions. The control will also receive

from the burner a safety signal in the event of failure.

● The burner module is fi tted with a controller installed inside

as standard. This controller is used to manage, confi gure and

diagnose all the operating parameters and safeties in the

burner.

12.8 Pre-assembly roofcurb

The 50EN/EH unit can be attached to a standardised pre-

assembly roofcurb with adjustable height, built in galvanised

steel panelling with polyester paint and thermal insulation.

The burner module includes a name plate featuring the main

gas characteristics as well as the 50EN/EH unit serial number

on which it is to be mounted.

GAS INFORMATION

COUNTRY

GAS

CATEGORY

PIN

50EN/EH unit with
burner CE certifi cate No.

CONSUMPT.

PRESSURE

TYPE

WO

Burner
model

m3/h

mbar

50EN/EH unit

identifi cation No.

The serial number must be used in all communication
regarding the unit.

Important: All the necessary information about the

installation, commissioning and maintenance of the burner

module is available in the specifi c instruction brochure on

gas burner No. 09.100, as well as in the manufacturer’s

(APENGROUP) installation and maintenance brochure

for the burners in the PCH series (both supplied with the

burner).

The following image shows a detail of the installation of the

roofcurb on a roof. The levelling system uses angle pieces that

allow adjustments in the X and Y axes.

The roofcurb is supplied thermally isolated, the installer must

only do a sealing upsweep around the roofcurb to ensure that

water does not penetrate the roof.

Important: All the necessary information about the

installation of the roofcurb is available in the specifi c

instruction brochure on roofcurb No. 12.62 (supplied with

the roofcurb).

26

13 - COMMISSIONING

13.1 Checks prior to commissioning

● It is advisable to make a complete sketch of the installation

including the location of the unit and all the components used.

This will be very helpful for maintenance and repairs to the

installation.

● The following must be verifi ed:

- That the electrical power supply remains constant and that

it corresponds to that featured on the unit data plate.

- That the electric installation has been carried out according

to the electric wiring diagram provided with the unit (consult

the chapter on “Electrical connection”).

- The correct connection of the sensors supplied with the unit

(consult the chapter on “Electrical connection”).

- That they are no cables close to heat sources.

● Once the above verifi cations have been carried out, the control

circuit is supplied with voltage by the automatic control switch.

Attention: the compressor crankcase heater must be put

under voltage for 24 hours before starting the compressor.

WICHTIG: WIEDERBEHEIZUNG DER

OLWANNE

BEIDER ERSTEN INBETRIEBSETRUNZ ORDER NACH EINER
LANGEN STROMUNTER-BRECHUNG BRINGEN SIE DIE
MASCHINE UNTER SPANNUNG 24 STRUNDERLANG
BEVOR SIE DEN(DIE) KOMPRESSOR(EN) EINSCHALTEN
KOENNEN.

IMPORTANT: CRANKCASE HEATING

FOR THE FIRSTSTART OR AFTER ALONG TIME OUT OF
VOLTAGE PUT THE MACHINE ON LIVE 24 HOURS BEFORE
TO ALLOW THE COMPRESSOR(S) STARTING

IMPORTANT: SURCHAUFFE CARTER D’HUILE

AU PREMIER DÉMARRAGE OU APRÈS UNE ABSCENCE
DE COURANT PROLONGÉE, METTRE LA MACHINE SOUS
TENSION 24 HEURES AVANT D’AUTORISER LE
DÉMARRAGE DU(DES) COMPRESSEUR(S).

SCROLL COMPRESSOR.

CHECK SENSE OF ROTATION

COMPRESSEUR SCROLL.

VÉRIFIER LE SENS DE ROTATION

COMPRESOR SCROLL.

COMPROBAR SENTIDO DE GIRO

● Check the unit operation and verify the safety devices.

Control of the refrigerant charge

● Each unit is shipped with an exact charge

of refrigerant for proper operation.

● To make sure that the unit is fi lled with the correct charge of

refrigerant, check the values of overheating and subcooling,

circuit by circuit, with the system running at full capacity.

If the refrigerant charge is lower than required, the suction

pressure will drop and overheating on the compressor inlets

will be high. This can cause an interruption in operation due

to activation of the refrigerant charge safety device.

To adjust the refrigerant charge, a schrader type valve is built

into the unit on the liquid line for each circuit. This changing

valve is located inside the compressor box.

● Verify the absence of any leaks of the refrigerant. In case of

a leak:

- Completely drain the refrigerant charge using a specifi c

recovery machine for R-410A and repair the leak.

- Next, reload the refrigerant into the unit according to charge

data provided in a table of the chapter on “Maintenance”

and in the unit’s data plate.

- Add the refrigerant via the charging valve using the

appropriate equipment and tools, with the compressors

stopped, monitoring the pressures to control any anomaly.

R 410A

IMPORTANTE: RISCALDARE IL CARTER

DELL’OLIO

AL PRIMO AVVIAMENTO U DOPO UNA INTERRUZIONE
PROLUNGATA DELLA ALIMENTAZIONE ELETTRICA,
LASCIARE LA MACCINA SOTTO TENSIONE PER 24 ORE
PRIMA DI AUTORIZZARE L’AVVIAMENTO DEL(DEI)
COMPRESSORE(I).

IMPORTANTE: RECALENTAMIENTO DE

ACEITE DEL CÁRTER

ANTES DEL PRIMER ARRANQUE O DESPUÉS DE UNA
AUSENCIA DE CORRIENTE POR UN LARGO PERIODO DE
TIEMPO, CONVIENE QUE LA UNIDAD ESTÉ CONECTADA
UN MÍNIMO DE 24 HORAS.

Important: As a safety feature to ensure heating of the

crankcase heater, if there is a power cut lasting over 2 hours,

the compressors will be locked. The unit must be powered for

8 hours to unlock them. The pGD1 terminal unit display will

shows the time remaining until they can be unlocked.

● All the units are equipped with scroll type compressors and a

phase control relay. Verify that they rotate in the correct sense

and, if not, reverse the power wires.

Access to the compressors
enclosure of circuit 1 and
recovery circuit (optional)
Note: in units with 4 circuits:
access to the circutis 1 and 2

Models 415 and 480

Access to the compressors
enclosure of circuit 2

Note: in units with 4 circuits:
access to the circutis 3 and 4

27

13 - COMMISSIONING

13.2 Possible problems at commissioning

All indications given in this manual must be respected and

complied with to guarantee a correct operation of the units.

Next, several possible operation problems are stated which

could happen if the conditions of the commissioning are not

appropriate.

● Air fl ow lack: very high diff erences between inlet and outlet

temperatures, originated by a high pressure drop in the ducts,

or by other causes that impede the correct circulation.

● Air recirculation in the unit, originated by some obstacle in the

air aspiration or outlet.

● Noise problems because of excessive air fl ow in the grille.

● Water overfl owing to the pan problems, originated by an

excessive fl ow, an incorrect siphon installation or because a

defective unit level.

● Refrigerant circuit humidity problem, because of an incorrect

vacuum realization.

13.3 Operational checks

Check the unit operation by verifying the electronic control and

the safety devices.

It is also recommendable to create a report, taking note of the

date, which includes the following information:

● the nominal voltage,

● current absorbed by the compressors, fans and other electrical

components,

● signifi cant temperatures in the cooling circuit (see attached

table),

● other aspects considered interesting such as alarms detected

by the electronic control of the unit.

The recording of these parameters whilst the unit is running

allows controlling the installation performance and it is the

best possible way to avoid breakdowns since the analysis of

these data makes early detection of anomalies possible or the

provision of the necessary means available to ensure that they

do not take place.

Operating readings

Cooling MODE

Suction pressure bar

Compressor

Air
condenser

Air
evaporator

Subcooling (2) - (3) ºC

Overheating (4) - (1) ºC

Heating MODE

Compressor

Air
evaporator

Air
condenser

Subcooling (2) - (3) ºC

Overheating (4) - (1) ºC

Suction temperature (1) ºC

Condensation pressure bar

Condensation temperature (2) ºC

Gas inlet temperature ºC

Liquid outlet temperature (3) ºC

Air inlet temperature ºC

Outdoor temperature ºC

Air outlet temperature ºC

Air inlet temperature ºC

Air outlet temperature ºC

Liquid inlet temperature ºC

Evaporation outlet temperature (4) ºC

Suction pressure bar

Suction temperature (1) ºC

Condensation pressure bar

Condensation temperature (2) ºC

Liquid inlet temperature ºC

Gas outlet temperature (4) ºC

Air inlet temperature ºC

Outdoor temperature ºC

Air outlet temperature ºC

Air inlet temperature ºC

Air outlet temperature ºC

Gas inlet temperature ºC

Liquid outlet temperature (3) ºC

28

14 - MAINTENANCE

The minimal maintenance operations and their periodicity
will be made in accordance with national regulations.

All work on the unit’s electrical or refrigerant systems must
be carried out by a qualifi ed authorised technician. See the
standard EN 378-4.

It is advisable to sign a maintenance contract with the installer
or an approved maintenance company.

14.1 General recommendations

Safety instructions

● Technicians working on the unit must wear the necessary
safety gear (e.g. gloves, eye protection, insulating clothing,
safety shoes).

● Similarly, it is recommended that personnel working close
to sources of high noise emission wear ear defenders. The
ear defenders should in no way impede the wearing of other
protective equipment.

● The surfaces of the compressor and pipes may reach
temperatures of over 100°C and cause burns if touched.
Likewise, the surfaces of the compressor may in some cases
drop to freezing temperatures which can cause frostbite. It is
therefore important to take special care when carrying out
maintenance work.

● Do not climb on the machine; use a platform to work at the
necessary height.

● Do not climb on the copper refrigerant pipes.

Caution: Do not work on any electrical components
without fi rst turning off the main door switch in the
electric panel.

Preliminary advise

● Keep the unit clean.

● To avoid accidents and ensure proper ventilation of the coil,
keep the unit and the space around it clean and clear of clutter.

● Check the fouling level of the coil.

Oil

Oils for refrigeration units do not pose any health risks if they

are used in compliance with the precautions for use:

● Avoid unnecessary handling of components lubricated with

oil. Use protective creams.

● Oils are fl ammable and must be stored and handled with care.

Disposable rags or cloths used in cleaning must be kept away

from open fl ames and disposed of in the appropriate manner.

● Containers must be stored with their caps on. Avoid using oil

from an opened container stored under incorrect conditions.

● Check the oil level and aspect. In case of a colour change,

check the oil quality using a contamination test.

● In the case of the presence of acid, water or metallic particles,

replace the aff ected circuit oil, as well as the fi lter dryer.

● If all the oil must be emptied, replace it imperatively with new

oil of the same grade as the original oil which has been stored

in a hermetically sealed container until its time of use.

The oil type recommended for these units is:

Copeland 3MAF 32cST, Danfoss POE 160SZ, ICI Emkarate
RL 32CF, Mobil EAL Artic 22CC.

The following table indicates the required volume:

Main circuits:

50EN/EH 415 420 480 485 540 600 650 720 840 960 11001200

Volume (l)

Recovery circuit (optional):

50EN/EH 415 420 480 485 540 600 650 720 840 960 11001200

Volume (l)

4 x 3,3 4 x 6,2

3,0 3,3 4 6,2 6,2

Refrigerant

Only qualifi ed personnel must perform a periodic leak testing, in
accordance with the regulation (EC) No. 517/2014.

● The frequency of checks is no longer related to the refrigerant
charge but to its global warming potential:

Charge kg x GWP = t CO2e

Carbon dioxide equivalency (t CO2e) is a quantity that
describes, for a given mixture and amount of greenhouse
gas, the amount in tonnes of CO2 that would have the same
global warming potential (GWP).

The number of tonnes of CO2 equivalent (t CO2e) can be
consulted in the following table:

Main circuits:

50EN/EH 415 420 480 485 540 600 650 720 840 960 1100 1200

2 x

2 x

2 x

2 x

2 x

2 x

2 x

2 x

4 x

4 x

4 x

Charge
(kg)

Environ.
impact
(t CO2e)

Recovery circuit (optional):

50EN/EH 415 420 480 485 540 600 650 720 840 960 1100 1200

Charge
(kg)

Environ.
impact
(t CO2e)

17,0

17,0

14,5

17,0

21,0

21,5

26,5

26,0

14,5

14,5

71,0 71,0 60,6 71,0 87,7 89,8 110,7 108,6 121,1 121,1 119,4 129,5

8,0 8,5 8,2 9,0 10,0 10,0 10,0 10,0 9,5 9,5 10,5 10,5

16,7 17,7 17,1 18,8 20,9 20,9 20,9 20,9 19,8 19,8 21,9 21,9

● Operators shall ensure that the unit is checked for leaks ad
minima according to the following frequency:

• t CO2e < 5 ......... not subjected

• t CO2e 5 to 50 ... every year

• t CO2e 50 to 500 every 6 months

• t CO2e > 500 ...... every 3 months

● Where a leakage detection system has been installed the
frequency of checks is halved.

Note: These machines use R410A. It is essential that technicians
use equipment which is compatible with R410A with a working
pressure which is approximately 1.5 times higher than that of
units using R407C.

● Always remember that refrigeration systems contain
pressurised liquids and vapours. All necessary provisions
must be made when the system is partially opened: ensure
the part of the circuit concerned is not pressurised.

● Partial opening of the primary refrigerating circuit will
cause a certain quantity of refrigerant to be released into
the atmosphere. It is essential to keep the amount of lost
refrigerant as low as possible by pumping the charge and
isolating it in another part of the system.

14,3

4 x

15,5

29

14 - MAINTENANCE

● The refrigerant and lubricating oil, and the low-temperature

liquid refrigerant in particular, may cause infl ammatory lesions

similar to burns if they come into contact with the skin or eyes.

Always wear protective eyewear, gloves and other protective

equipment when opening pipes or tanks liable to have liquids

in them.

● Store unused refrigerant in the appropriate containers and

limit the amounts stored in mechanical rooms.

● Cylinders and tanks of refrigerant must be handled with care

and signs warning users of the related poisoning, fi re and

explosion hazards must be clearly visible.

Refrigerant that reaches the end of its life must be collected

and recycled in accordance with applicable regulations.

14.2 Servicing

It’s recommended to note down the operating readings and
perform the following checks at least twice a year and mandatory
after each time a unit is started for seasonal use.

Weekly checks

With the unit running at full capacity, check the following values:

● LP compressor suction pressure and HP compressor
discharge pressure.

● The oil level and its appearance. If the colour changes, check
the quality.

● Also check whether the safety devices operate correctly.

● Check the entire system for traces of water or oil under or
around the unit and for any unusual noises.

14.3 access to the main components

Quarter-turn latches

The access panels to fi lters, supply fans, compressors and

electric panel are fi tted with hinges + quarter-turn latches. These

latches of stainless steel have triangular insert 8 mm.

● Closing mode:

First rotate 90º (anti-clockwise): closing brings

the latch to the locked position. The door

cannot be opened.

Air coil

● Check that the coil is free from dust and grease.

● Cleaning the accumulated dust on the coil can be performed

using a soft-bristled brush or a vacuum cleaner perpendicular

to the fi ns or with a low-pressure water cleaner. Grease can

be removed with water with degreaser. Do not put stress on

the fi ns as they could deform.

Use safety gloves for this task. Take care with the sharp

parts of the coil.

V-220005

Outdoor coil protective grille (optional)

All the models can include a protection grille for this coil. This

grille is fi xed by modules in the holes made for this goal in

the unit’s support.

Monthly checks

● Check all the values listed in the table “Operating readings“
on chapter 13.

● Check for corrosion on all metal surfaces (chassis, casing,
exchangers, electric panel, etc.).

● Make sure that the insulating foam is neither detached nor
torn.

● Check the coolants for any impurities which could cause
wearor corrosion in the exchanger.

● Check the circuits for leaks.

● Check whether the safety devices and the expansion valve(s)
operate correctly.

Annual checks

● Carry out the same inspections as during the monthly checks.

● Carry out an oil contamination test (every year or every 5000
hours). If acid, water or metal particles are found, replace
the oil in the circuit concerned and the dryer. Follow the
recommendations of paragraph 14.1.

● Check the electrical connections to ensure they are tight and
in good condition.

● Check the condition of the contacts and the current at full load
on all three phases.

● Check the electrical box for water seepage.

N.b.: The intervals for cleaning are given as a guide and should
be adapted to each unit.

Holes

Grille
module

Condensate drainage pan

● Check that the condensate pan is suffi ciently clean.

● Check that the drain is not clogged.

● Cleaning of the pan can be done with water and non-abrasive

detergent.

Centrifugal fan (optional)

● Verify that the turbine and the motor remain clean.

● Foresee having a spare belt set for the fans.

● The motors and the fans have bearings that have been

lubricated and sealed and, thus, do not need further lubrication

(except in the case of fans with a reinforced shaft).

30

14 - MAINTENANCE

Compressor

In the case of compressor replacement:

● Disconnect the unit from power supply.

● Completely empty the refrigerant charge using a specifi c
recovery unit for R-410A

● Disconnect electrically the compressor.

● Carefully unsolder the suction and discharge piping.

● The compressor is fi xed onto the platform with 4 screws.

● Unscrew the fi xings.

● Place the new compressor and check that it has a suffi cient
oil charge.

Warning: when tightening the compressor screws, please
consult the maximum torque that can be applied.

If a torque wrench is not available,tighten them until they are
snug then tighten a further ¾ turn.

● Solder the suction and discharge piping.

● Connect the compressor in accordance with the wiring
diagram.

● Make vacuum and next, reload the gas into the unit according
to charge data provided in the table of paragraph 14.1
“General recommendations” and in the unit’s data plate.

Active recovery (optional)

Dryer fi lter

● The fi lter function is the preserve the cooling circuit clean and
without humidity, neutralizing the acids that can be found in
the cooling circuit.

● Measure the diff erence in the temperature of the pipes at the
dryer inlet and outlet.

● If necessary, replace.

Compressor

Filter drier

Particle
separator

Mixing boxes and free-cooling (optional)

● A cooling recovery circuit is optionally available for these units
(MRC0 and MRC1 assemblies). It is a complete circuit with
independent electronic control.

● The same recommendations for the maintenance of the
components of the main circuits must be followed for the
components of this circuit.

Recovery
circuit
compressor

Refrigerant leak detector (optional)

Maintenance:

● Annual testing: it is necessary
to carry out testing every year to
comply with the EN378 and F-GAS
regulations.

● Every 3 years: a taring test is
recommended.

● Every 5/6 years: it is recommended that the gas detection
element be replaced and calibration performed.

Note: Check the documentation attached to the leak detector
for taring and calibration testing.

In units with mixing box assemblies with motorised dampers it
is advisable to check the condition of the servomotors.

● Assemblies with 2 dampers-> 1 servo

● Assemblies with 3 dampers -> 2 servos

Note: The available
assemblies can be
consulted in chapter 3.

Damper locked
with the mixing
damper

Motorised
dampers

Servomotors

Air fi lters in the grids of the electric panel

● The appearance of the fi lters located
inside of the grids must be examined
periodically, because the clogged
fi lters impede good ventilation.

● Cleaning can be done with a
household vacuum cleaner. Replace
them regularly.

115 x 115 mm G2 fi lters.

31

14 - MAINTENANCE

Air fi lters

● Depending on the installation conditions, the fi lter aspect must
be examined to defi ne the cleaning or replacing periodicity.
Spare parts should be planned for.

The pressure drop data are given on the technical catalogue.

Cleaning the fi lters is very important to maintain the required
available pressure of the unit.

On units with a clogged fi lter diff erential pressure switch, an
alarm is triggered on the electronic control when the factory-set
clogging threshold is exceeded depending on the combination
of fi lters selected.

● Gravimetric fi lters (G). Cleaning can be done with a household
vacuum cleaner. Replace them regularly.

● Creased opacimetric fi lters (F). It is necessary to replace them.

Filter removal:

● Filters G or G+F: the frames with each type of filters,
gravimetrics and opacimetric (if the unit has includes the
latter), are assembled over sheet steel profi les. By dragging
a tab, they slide along the corresponding rail.

Note: the access panel to the fi lters is fi tted with hinges + quarter­turn latches of stainless steel and 8 mm triangular insert.

Rotary heat exchanger (optional)

By the right panel (viewed from the front), it is possible to access
inside of the recovery module to carry out the maintenance work.

Quarter-turn
latches

Access panel
to the recovery
module

Tabs in displacement

● Filters F+F: the frames with the set of filters F+F are
assembled over a sheet steel profi le. By dragging a tab, they
slide along the rail.

The removal side panels of the module incorporate stainless
steel quarter-turn latches with 8 mm triangular inserts.

● Closing mode:

First rotate 90º (anti-clockwise): closing brings
the latch to the locked position. The door
cannot be opened.

Acces to the
servomotor of
the extraction
damper

Access to
gravimetric
fi lters in the
extraction air

Access to
gravimetric
fi lters in the
fresh air and
to the damper
servomotor

32

Tabs in
displacement

Wheel motor

The procedure for extraction and cleaning of fi lters is equal to
that described in the previous section.

15 - CONTROL AND ANALYSIS OF BREAKDOWNS

Symptom Cause Solution

Evaporation pressure very high in relation with

the air inlet

Very low condensation pressure a) Gas lack

Condensation pressure very high in relation to

the air outlet, high pressostat cutoff

Evaporation pressure too low (low pressure

safety cut-off )

Compressor does not start, does not make

noise (humming)

Compressor does not start, motor sounds

intermittently

Repeated compressor starts and stops a) Because of high pressure

The compressor makes a noise a) Loose attachment

Noisy operation a) Unit installed without antivibration protection a) Place base over shock absorbers

Cycle reversing is not carried out:

- No defrosting

- Does not change winter - summer cycles

Alarm or reading error in the humidity probe

(with enthalpic control)

a) Charge excess

b) High air temperature

c) Compressor suction not air tight

d) Cycle reversing valve in middle position

b) Compressor suction not air tight

c) Cycle reversing valve in middle position

d) Liquid circuit plugging

a) Insuffi cient air fl ow

b) Air inlet temperature very high

c) Dirty condenser (does not exchange)

d) Much refrigerant charge (fl ooded condenser)

e) The condenser fan is broken down

f) Air in the cooling circuit

a) Low fl ow in evaporator. Air recirculation

b) Frozen evaporator

c) Liquid line as diff erent temperatures at fi lter

inlet and outlet

d) Gas lack

e) Very low condensation pressure

f) Evaporator fan broken down

a) No power

b) The contacts of a control element are open

c) Timing of anti cycle short does not allow the

starting

d) Open contact

e) Contactor coil burnt

f) Indoor klixon open

a) Electrical power supply very low

b) Power cable disconnected

b) Control diff erential too short (short cycle)

c) Insuffi cient gas, cut-off because of low

pressure

d) Dirty or frosted evaporator

e) The evaporator fan does not work, cuts off the

low pressostat

f) Expansion valve damaged or clogged by

impurities (cuts off the low pressure safety)

g) Dehydrating fi lter clogged (cuts off the low

pressure safety)

b) Oil lack

c) Compressor noise

a) Electrical fault

b) Inversion valve coil defective

c) Defrost method not working

d) Cycle reversing valve in middle position

e) Control fault

a) Dirt in the humidity sensor a) Disassembly the probe encapsule.

a) Collect refrigerant

b) Verify overheating

c) Verify compressor state and replace

d) Check that the valve is not clogged. Replace

if necessary

a) Search for leaks, complete charge

b) Verify compressor state and replace

c) Check that the valve is not clogged. Replace

if necessary

d) Verify the dehydrating fi lter and expansion

valve

a) Verify the air circuits (fl ow, fi lter cleanliness...)

b) Verify the control thermostat readjustment

c) Clean it

d) Collect refrigerant

e) Repair

f) Make vacuum and charge

a) Verify the air circuits (fl ow, fi lter cleanliness...)

b) Verify defrost

c) Replace fi lter

d) Search for leaks, complete charge

e) Temperature of air or water in condenser very

low (air or water fl ow very high), adjust fl ow

f) Repair

a) Check diff erential, fuses

b) Verify the safety chain of the electronic control

c) Verify electronic control

d) Replace

e) Replace

f) Wait for reactivation, verify current absorbed

a) Control line voltage and locate voltage drop

b) Verify connections

a) Verify charge

b) Increase diff erential

c) Search for leak, reload unit

d) Clean, verify evaporator air circuit

e) Replace or repair

f) Replace, as well as fi lter

g) Replace

a) Fix

b) Add oil to recommended level

c) Replace

a) Locate and repair

b) Replace

c) Verify parameters

d) Tap with running compressor. Replace if

necessary

e) Locate and repair

Proceed to clean the sensor with some soft

cotton element and non-abrasive fl uid, without

pressing it.

Reassemble the casing, checking that the

cable is in contact externally with the metallic

mesh.

33

16 - FINAL SHUTDOWN

16.1 Shutting down

Separate the units from their energy sources, allow them to cool

then drain them completely.

16.2 Recommendations for disassembly

Use the original lifting equipment.

Sort the components according to their material for recycling or

disposal, in accordance with regulations in force.

Check whether any part of the unit can be recycled for another

purpose

16.3 Fluids to be recovered for treatment

● Refrigerant

● Energy transfer fl uid: depending on the installation, water,

glycol/water mix.

● Compressor oil

16.4 Materials to be recovered for recycling

● Steel

● Copper

● Aluminium

● Plastics

● Polyurethane foam (insulation)

16.5 Waste electrical and electronic equipment
(WEEE)

At the end of its life, this equipment must be disassembled and

contaminated fl uids removed by professionals and processed

via approved channels for electrical and electronic equipment

(WEEE).

Important: In order to recycle these units follow the

stipulations of Directive 2012/19/EU on Waste electrical

and electronic equipment (WEEE).

34

CARRIER participates in the ECP programme for RT
Check ongoing validity of certifi cate:
www.eurovent-certifi cation.com

Order No.: 10049, 12.2018. Supersedes order No.: 10.2016 Manufactured for CARRIER in Spain.
Manufacturer reserves the right to change any product specifi cations without notice. Printed in the European Union.