ALFA ELECTRIC ARC050.002 Roof Mount Air Conditioner for Electrical Enclosure Indoor Application User Manual

ALFA ELECTRIC ARC050.002 Roof Mount Air Conditioner for Electrical Enclosure Indoor Application

TECHNICAL DATA

protection degree)

Design| casing| –| Galvanised sheet steel
cover| –| Galvanised sheet steel powder coated RAL7035
Weight| kg| 22
Conformity / Certifications| –| CE

INSTALLATION

PRODUCT HANDLING

AIR CONDITIONER ARC series must be handled in upright position and protected against accidental tipping over.

GENERAL CHECKS BEFORE INSTALLATION
Before the installation make sure that the cabinet is disconnected from the electrical supply.

GENERAL CHECKS

– electrical enclosure must be disconnected form power supply
– electrical data shown on rating label pasted on air conditioner side must be guaranteed
-Electrical enclosure must be sized according to air conditioner dimensions and weight.
– Electrical enclosure must have at least IP54 protection degree
– Internal and external components of electrical enclosure don’t have to affect the proper installation of air conditioner
– The installation site must be free from excessive dirt, aggressive ambient conditions and moisture.
– The installation site must be free from hot air flows
– The internal side of electrical enclosure must be free from dirt and moisture
– The environment temperature must be within the range specified on label pasted on air conditioner side
–  Inside of electrical enclosure there must not be components that could affect the proper ventilation
– the enclosure positioning with installed air conditioner must be carefully selected to ensure good ventilation (clearance between the air conditioner and the near walls must be at least 500 mm in each side).
– Proper disposing of condensate discharge

FITTING

1) Make the fixing hole on the enclosure as is shown in the drilling template

VIEW FROM EXTERNAL OF ELECTRICAL ENCLOSURE

Deburr all sharp edges to avoid accidental injuries

2) Lift the air conditioner by lifting eyebolt and place on the enclosure roof
3) Mount the air conditioner on the electrical cabinet according to the drilling template with adequate M6 screws and washers against unscrewing (not included in mounting kit)
4) Connect an adequate hose to the condensate drain pipe like is shown by picture below

Air conditioner produces condensate because the moist air inside of the enclosure meets cold heat exchanger (evaporator) and then it becomes water; water production decreases during air conditioner working because enclosure air becomes dry.

The condensate must be properly evacuated to avoid accidental damage to the electrical enclosure
The enclosure must be IP 54 protected, if enclosure is not airtight, condensate production could increase.
The enclosure IP54 degree is guaranteed only if the air conditioner is proper mounted.

ELECTRICAL INSTALLATION

The electrical installation must be carried out by a qualified electrician who is responsible for compliance with the applicable standards and regulations.

The male plug is fitted with spring terminals:

1) Push the spring with a screwdriver and then insert the wire.
2) Check the proper wire insertion.
3) Connect the unit with the power s

The supply connector (1) is placed on the bottom of the air conditioner. When air conditioner is installed on electrical enclosure, female connector is accessible only from inside the enclosure.

ALARM OUTPUT / DIGITAL INP

Air conditioner is fitted with an electronic controller which permits alarm output and digital input signals

Alarm output

Alarm output is activated according to alarm parameters (for example in case of enclosure temperature higher than ALU value, digital input not activated… See PARAMETERS at 4.2 DIGITAL THERMOSTAT INSTRUCTION section) Alarm output is a potential-free contact

Digital input

WARNING: proper functions of air conditioner are allowed only if digital input is activated. (closed contact between poles 13-14).
Digital input can be a door limit switch or a generic external clean contact.
Plug for signals is factory wired with a bridge between 13-14 poles.
Bridge can be removed to wire, for example, a door limit switch.

Electrical data shown on rating label pasted on air conditioner side must be guaranteed
Install the delayed fuse recommended on rating plate pasted on air conditioner side to protect the line and enclosure components against short-circuit.
Upstream of the electrical connection, an efficient disconnection system must be provided and it must be clearly identified Air conditioner is already fitted with a temperature controller, no additional temperature control must be connected upstream of the unit.

STARTING AND ADJUSTMENT

GENERAL DESCRIPTION
ALFA ELECTRIC air conditioners are especially designed for dissipation of heat loss inside electrical enclosures with IP54 protection degree.
Air circulation inside the enclosures allows to keep enclosure air volume isolated from external ambient air, it preserves the inside of the enclosure against dirt and hum which are present in the external air.

ARC series must be installed only on the roof of electrical enclosure.
After finishing assembly of the conditioner, wait approx. 30 min. before starting it (the oil must collect in the compressor to ensure lubrication and cooling)

The air conditioner operates automatically, that is to say, after insertion, the evaporator fan operates continuously making the air inside the cabinet circulate. This way a uniform distribution of temperature inside the cabinet itself is attained. The built-in thermostat drives compressor and condenser fan according to set point value and other parameters (See PARAMETERS at 4.2 DIGITAL THERMOSTAT INSTRUCTION section for references)

Compressor and condenser fan start after a delay set on thermostat (see parameter AC on parameters list for references) to permit a minimum interval between the compressor stop and the following restart

During proper operations, the compressor and condenser fan turn OFF when internal enclosure temperature decreases under set point value.

DIGITAL THERMOSTAT INSTRUCTIO

WARNING: the air conditioner is designed to operate at 35 ° C cabinet temperature. If the set point is changed the performance of the unit will vary.

1) Regulating thermostat is fixed on side of air conditioner.
2) Thermostat could be set into a range from 20°C up to 50°C. Follow thermostat instructions for parameter changing.

| To display target set point; in programming mode it selects a parameter or confirm an operation.
---|---
| (DEF) To start a manual defrost
| To see the max. stored temperature; in programming mode it browses the parameter codes or increases the displayed value.
| To see the min stored temperature; in programming mode it browses the parameter codes or decreases the displayed value.
| To switch the instrument off, if on F = oFF.
| To switch the light, if oA1 = Lig

KEY COMBINATIONS

| To lock & unlock the keyboard.
---|---
| To enter in programming mode
| To return to the room temperature display

LED FUNCTION DESCRIPTION

LED| MODE|

FUNCTION

---|---|---
| ON| Compressor enabled
| Flashing| Anti-short cycle delay enabled
| ON| Defrost enabled
| ON| An alarm is occurring
| ON| Continuous cycle is running
| ON| Energy saving enabled
| ON| Light on
| ON| Auxiliary relay on
| ON| Measurement unit
| Flashing| Programming phase

MAX & MIN TEMPERATURE MEMORIZATION

How to see the min temperature

1. Press and release the ▼ key.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the ▼ key again or by waiting 5s the normal display will be restored.

How to see the max temperature

1. Press and release the ▲ key.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the ▼ key again or by waiting 5s the normal display will be restored.

How to reset the max and min temperature recorded

1. Hold press the SET key for more than 3s, while the max. or min temperature is displayed. (rSt message will be displayed)
2. To confirm the operation the “rSt” message starts blinking and the normal temperature will be displayed.

HOW TO SEE THE SET POINT

1. Push and immediately release the SET key: the display will show the Set point value;
2.  Push and immediately release the SET key or wait for 5 seconds to display the probe value again.

HOW TO CHANGE THE SETPOINT

1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the ▲ or ▼ arrows within 10s.
4. To memorise the new set point value push the SET key again or wait 10s.

HOW TO CHANGE A PARAMETER VALUE

To change the parameter’s value operate as follows:

1. Enter the Programming mode by pressing the SET + ▼ keys for 3s (the “°C” or “°F” LED starts blinking).
2. Select the required parameter. Press the SET key to display its value
3. Use ▲ or ▼ to change its value.
4. Press SET to store the new value and move to the following parameter.
   To exit: Press SET + ▲ or wait 15s without pressing a key.
   NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.

HOW TO LOCK THE KEYBOARD

1. Keep pressed for more than 3 s the ▲ + ▼ keys.
2. The POF message will be displayed and the keyboard will be locked. At this point it will be possible only to see the set point or the MAX o Min temperature stored
3. If a key is pressed more than 3s the POF message will be displayed.

HOW TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the ▲ + ▼ keys, till the Pon message will be displayed.

THE ON/OFF FUNCTION
With onF = oFF, pushing the ON/OFF key, the instrument is switched off. The OFF message is displayed. In this configuration, the regulation is disabled. To switch the instrument on, push again the ON/OFF key.
WARNING: Loads connected to the normally closed contacts of the relays are always supplied and under voltage, even if the instrument is in standby mode.

PARAMETERS

Regulation
Hy Differential: (0,1 ÷ 25,5°C / 1÷255 °F) Intervention differential for set point. \
Compressor Cut IN is Set Point + differential (Hy). Compressor Cut OUT is when the temperature reaches the set point.
Ot Thermostat probe calibration: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of the thermostat probe.
AC Anti-short cycle delay: (0÷50 min) minimum interval between the compressor stop and the following restart.
CH Type of action: CL = cooling; Ht = heating.
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display.
dLy Display delay: (0 ÷20.0m; risul. 10s) when the temperature increases, the display is updated of 1 °C/1°F after this time.
IdF Interval between defrost cycles: (0÷120h) Determines the time interval between the beginning of two defrost cycles.
MdF (Maximum) length for defrost: (0÷255min) (0=no defrost) When P2P = n, (not evaporator probe: timed defrost) it sets the defrost duration, when P2P = y (defrost end based on temperature) it sets the maximum length for defrost.
ALU MAXIMUM temperature alarm: (SET÷110°C; SET÷230°F) when this temperature is reached the alarm is enabled, after the “ALd” delay time.
ALL Minimum temperature alarm: (-50.0 ÷ SET°C; -58÷230°F when this temperature is
reached the alarm is enabled, after the “ALd” delay time.
i1P Digital input polarity: oP: the digital input is activated by opening the contact; CL:
the digital input is activated by closing the contact.
i1F Digital input configuration: EAL = external alarm: “EA” message is displayed; bAL = serious alarm “CA” message is displayed. PAL = pressure switch alarm, “CA” message is displayed; dor = door switch function; dEF = activation of a defrost cycle; AUS =to switch on the second relay if oA1 = AUS; Htr = kind of action inversion (cooling –heating); FAn = not set it; ES = Energy saving.
did (0 ÷ 255 min) with i1F= EAL or i1F = bAL digital input alarm delay: delay between the detection of the external alarm condition and its signalling.
with i1F= dor: door open signalling delay
with i1F = PAL: time for pressure switch function: time interval to calculate the number of the pressure switch activation.
PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC =
PBC probe, ntc = NTC probe.
dP3 Third probe display- no available
.dP4 Fourth probe display- no available

DIGITAL INPUT (ENABLED WITH P3P = N)

The free voltage digital input is programmable in different configurations by the “i1F” parameter.

Door switch input (i1f = dor)
It signals the door status and the corresponding relay output status through the odc parameter:
no= normal (any change);, Fan= fan OFF; CPr= Compressor OFF, F_C= Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter did, the door alarm is enabled, the display shows the message dA and the regulation restarts is rtr = yES. The alarm stops as soon as the external digital input is disabled again. With the door open, the high and low temperature alarms are disabled

Digital inputs polarity
The digital input polarity depends on the i1P parameter.
i1P=CL: the input is activated by closing the contact.
i1P=OP: the input is activated by opening the contact

GENERIC ALARM (i1F = EAL)
As soon as the alarm input is activated (for example enclosure temperature higher than ALU value) the unit will wait for did time delay before signalling the EAL alarm message.
The outputs status doesn’t change. The alarm stops just after the alarm input is deactivated.

SERIOUS ALARM MODE (i1F = bAL)
When the alarm input is activated (for example enclosure temperature higher than ALU value), the unit will wait for did delay before signalling the CA alarm message. The relay outputs are switched OFF. The alarm will stop as soon as the alarm input is de-activated.

ALARM SIGNALS

unchanged.
“LA2”| Condenser low temperature| It depends on the “bLL” parameter
“ dA “| Dooropen| Compressor according to rrd
“ EA “| External alarm| Output unchanged.
“CA”| Serious external alarm (i1 F=bAL)| All outputs OFF.
“CA”| Pressure switch alarm (i1 F=PAL)| All outputs OFF
“rte”| Real time clock alarm| Alarm output ON; Other outputs unchanged;

Defrosts according to par. “ l d F ” Set real time clock

has to be set

rtF| Real time clock board failure| Alarm output ON; Other outputs unchanged;

Defrosts according to par. “ l dF ” Contact the

service

DEFAULT SETTING VALUES

Label| Name| Range| °C/°F|
---|---|---|---|---
Set| Set point| LS÷US| 31.0| —
Hy| Differential| 0,1÷25.5°C/ 1÷ 255°F| 4.0| Pr1
Ot| Thermostat probe calibration| -12÷12°C /-120÷120°F| 0.0| Pr1
AC| Anti-short cycle delay| 0 ÷ 50 min| 1| Pr1
CH| Kind of action| CL=cooling; Ht= heating| cL| Pr1
rES| Resolution| in=integer; dE= dec.point| dE| Pr1
IdF| Interval between defrost cycles| 1 ÷ 120 hours| 8| Pr1
MdF| (Maximum) length for defrost| 0 ÷ 255 min| 0| Pr1
ALU| MAXIMUM temperature alarm| Set÷ 110.0°C; Set÷230°F| 50.0| Pr1
ALL| Minimum temperature alarm| -50.0°C÷Set/ -58°F÷Set| -50.0| Pr1
i1P| Digital input polarity| oP=opening;CL=closing| oP| Pr1
i1F| Digital input configuration| EAL, bAL, PAL, dor; dEF; Htr, AUS| dor| Pr1
did| Digital input alarm delay| 0÷255min| 0| Pr1
PbC| Kind of probe| Ptc; ntc| ntc| Pr1
dP3| Third probe display| —| noP| Pr1
dP4| Fourth probe display| —| noP| Pr1

SPARE PARTS LIST

See wiring diagram page 6 for reference

WARRANTY

WE Alfa Electric

Division of:
ALFA PLASTIC s.a.s.
Via Della Valle, 39 – 20048 CARATE BRIANZA (MI)
Tel. +39 (0362) 903.539 –
Fax +39 (0362) 975.133
Mail: info@alfaelectric.com
www.alfaelectric.com

guarantees that the product is free from any quality defects.
The product is guaranteed for a period of 12 months from the date of delivery, provided it operates under the following conditions:

1. value of power supply indicated in the data plate is completely respected;
2. requirements specified on user’s manual are completely respected;
3. cabinet temperature is not higher or lower than its rated temperature;
4. ambient temperature is not higher or lower than its rated temperature;
5. the product is mounted on cabinets with a minimum IP54 protection level;
6. the product is mounted on cabinets that not requiring higher cooling power than expected;
7. the product is clearly identifiable by serial number.

The warranty does not apply if :

1. the cooling circuit has been modified about type and quantity of refrigerant or composition;
2. the unit operates in acid or corrosive ambient;
3. the unit has been modified without ALFAPLASTIC consent.

This warranty shall become null as soon as the product is altered or modified in its structure or in circuits.
The terms of this warranty (commencement and termination dates) are not modified by any repair or replacement of products.
For every part that results defective during the period of this warranty, ALFAPLASTIC shall repair or replace it. Any others charges arising from removal, handling and installation of the products shall not be refunded by ALFAPLASTIC.
Like is specified on user’s manual, installation, handling, the correct earthing in accordance with all current standards are under the responsibility of costumer.
In the event of any damage caused by a defective product shall apply the EEC85.374 standard.
The malfunction must be communicated in writing to ALFAPLASTIC.
Warranty is void if the costumer is not in good standing with the payment

LEGAL RAPRESENTATIVE

FIORATTI P.

UE DECLARATION OF CONFORMITY

WE Alfa Electric

Division of:
ALFA PLASTIC s.a.s.
Via Della Valle, 39 – 20841 CARATE BRIANZA (MB)
Tel. +39 (0362) 903.539 – Fax +39 (0362) 975.133
Mail: info@alfaelectric.com
www.alfaelectric.com

DECLARE THAT THE AIR CONDITIONER FOR ELECTRICAL CABINETS

AVC, AVE, ARC SERIES
DO COMPLY WITH THE FOLLOWING DIRECTIVES
2006/42/CE MACHINERY DIRECTIVE (17 May 2006)
2014/35/UE LOW VOLTAGE DIRECTIVE (26 February 2014)
2014/30/UE EMC DIRECTIVE (26 February 2014)
2011/65/UE ROHS DIRECTIVE (8 June 2011)
STANDARDS APPLIED TO MEET THE PRINCIPAL ELEMENTS OF THE DIRECTIVE
EN 60335-2-40:2003; A1; A2 (IEC 60335-2-40: 2002; A1; A2)
EN 60335-1: 2010; A11; A13; A14; A1; A2 (IEC 60335-1; A1; A2)
OTHER STANDARDS APPLIED
EN 55014-1: 2017
EN 55014-2: 2015
EN IEC 61000-3-2: 2019
EN 61000-3-3: 2013

LEGAL RAPRESENTATIVE
FIORATTI P.

Description Original user’s manual for air conditioner ARC050 series Language: English| ISSUE| 25/06/2021| Ascheri M.
REV. 01| |
REV. 02| |
REV. 03| |

Designation: AIR CONDITIONER FOR ELECTRICAL ENCLOSURE
UMA-CDZ-ARC050.002-00

References

• Alfa Electric | Condizionamento e accessori quadri elettrici

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