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Carrier 38UQZ016, Инструкции по установке, эксплуатации и обслуживанию

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7

Table 10 - Options/accessories

38UQZ-40ALZ 

Option 

Accessory

Heating coils for 40ALZ indoor units:
A - electric resistance heaters 

x 

x

B - hot-water coils 

x 

x

Head pressure control for cooling operation at outdoor air temperatures 
below +19°C (38UQZ)* 

x 

x

Special drives for higher indoor unit fan static pressure 
(40ALZ - installed in the units on request) 

- 

x 

Room thermostat 

x 

-

*  To be requested at time of order, installed in the 38UQZ units.

Compressor replacement

NOTE: This operation must be done by a qualified 
technician.

When an internal fault occurs, the compressor must be 
replaced. This must be done as detailed below:
• 

Disconnect the unit from the electrical supply.

• 

Remove the panels.

• 

Remove the gas from the refrigerant circuit using 
recovery equipment to avoid harming the atmosphere.

• 

Electrically disconnect the compressor.

• 

Unbraze or unscrew the suction and discharge lines, 
taking care not to damage the rest of the components.

• 

Remove the fastenings from the compressor.

• 

Replace the compressor, ensuring that it contains 
sufficient oil.

• 

Check if the oil of the defective compressor contains 
any acidity from burnt-out windings.

• 

If the oil contains acid, this will also be present in the 
refrigerant circuit. All the acid must be removed from 
the refrigerant circuit, otherwise the new compressor 
will also be damaged. In order to remove the acid 
proceed as follows:

 

a)  Thoroughly clean the refrigerant circuit using dry 

nitrogen in the opposite direction to the refrigerant 
flow, or another cleaning element. Also carefully 
clean the separate parts of the refrigerant circuit.

 

 

Install anti-acid filters in the liquid line. Solder the 
refrigerant lines. Evacuate the lines and charge 
them with refrigerant. Operate the unit for some 
time. Remove the oil and check the acidity.

 

 

If there is still acid present, repeat the steps above 
several times, until no acid exists.

 

b)  If you do not want to carry out the procedure de-

scribed under (a), introduce an anti-acid substance 
into the refrigerant circuit, if the refrigerant line 
length is short.

 

c)  It  is also possible to install an anti-acid filter in 

the suction lines.

 

d)  Analyse the refrigerant circuit acidity several times 

and replace the anti-acid filters several times until 
no acidity exists.

 

e)  Remove the filter from the liquid line in the 

38UQZ units. Install a new filter when no acid 
remains in the circuit.

• 

Once the defective compressor has been replaced by a 
new one and the oil has been analysed, proceed as 
follows:

 

- 

Braze or screw in the lines.

 

- 

Connect the compressor according to the wiring 
diagram.

 

- 

Evacuate the compressor.

 

- 

Carry out a leak test. Repair any leaks detected.

 

- 

Fill the refrigerant charge indicated on the name-
plate, plus the required charge for the refrigerant 
connection lines.

Содержание 38UQZ016

Страница 1: ...he Eurovent Certification Programme Products are as listed in the Eurovent Directory of Certified Products 38UQZ 016 020 024 40ALZ 016 020 024 Split System Air to Air Heat Pumps Installation Operation and Maintenance Instructions ...

Страница 2: ...ATION 14 38UQZ outdoor units 14 40ALZ indoor units 16 ELECTRICAL CONNECTIONS 19 REFRIGERANT LINE CONNECTIONS 20 Connection between units 20 Refrigerant piping design 21 Pipe diameter calculation procedure 21 REFRIGERANT CHARGE 23 OIL RECHARGE 24 START UP 24 Initial checks 24 UNIT COMPONENTS 25 DESCRIPTION OF UNIT PROTECTION DEVICES 25 OPERATING LIMITS 25 GENERAL MAINTENANCE 26 Servicing recommenda...

Страница 3: ...o C Entering air temp o C Leaving air temp o C Leaving air temp o C Pressure drop air kPa Pressure drop air kPa Discharge air pressure Pa Discharge air pressure Pa Fan motor input Ph 1 Volts Fan motor input Ph 1 Volts Ph 2 Volts Ph 2 Volts Ph 3 Volts Ph 3 Volts SAFETY DEVICE SETTING 38UQZ UNIT High pressure switch cut out kPa cut in kPa Low pressure switch cut out kPa cut in kPa Step controller cu...

Страница 4: ...C db Based on an outdoor air temperature of 6 C wb and an indoor air entering temperature of 21 C db The refrigerant charge is for the complete system 38UQZ and 40ALZ but excludes the refrigerant connection lines Table 2 Electrical data 38UQZ 40ALZ 016 020 024 Nominal supply V ph Hz 230 3 50 400 3 50 230 3 50 400 3 50 230 3 50 400 3 50 Voltage range V 207 253 360 440 207 253 360 440 207 253 360 44...

Страница 5: ... 5 8 4 Cable entry 5 Main disconnect switch 6 Control box 7 Front access panel 8 Side acces panel both sides 9 Heat echangers 0 Compressors Fans Fig 1 38UQZ dimensions mm Plan view When designing an installation always use up to date drawings available from your local Carrier office Side view Rear view ...

Страница 6: ...nt and right side view Detail A Electrical connections Refrigerant line connections Access panel Outlet Hot water coil connections accessory option Air inlet Standard drain ø 23 See detail A Rear and left side view Note The air discharge can be changed from horizontal to vertical see page 17 When designing an installation always use up to date drawings available from your local Carrier office Dime...

Страница 7: ...8UQZ 016 024 Required service space for the removal of the air filter and the fans in case of a breakdown Clearance should be the same as the unit width 1000 500 500 600 600 40ALZ all sizes Air filter removal Air filter removal 500 ...

Страница 8: ...oordinates mm approx 38UQZ 016 024 40ALZ all sizes 3 38UQZ 016 020 024 XG 1060 1060 1070 YG 300 340 380 ZG 280 320 400 Measured from point 3 40ALZ 016 020 024 XG 1620 1625 1870 YG 230 230 230 ZG 520 520 520 Measured from point 3 ...

Страница 9: ...ion kg approx 38UQZ 016 024 40ALZ Air filters 3 1 5 4 6 Point 38UQZ 016 020 024 1 180 210 221 2 180 210 221 3 29 33 36 4 29 33 36 5 31 34 38 6 31 34 38 Point 40ALZ 016 020 024 1 43 46 53 2 47 51 53 3 100 104 110 4 100 104 109 ...

Страница 10: ...er input kW 40ALZ 016 high pressure option Available static pressure Pa Air flow l s Power input kW Indoor fan speed Curve Pulley position Standard r s High pressure option r s 0 Closed 17 78 21 42 1 1 17 21 20 74 2 2 16 51 19 89 3 3 15 88 19 14 4 4 15 23 18 35 Factory setting 2 16 51 19 89 ...

Страница 11: ...pressure option r s 0 Closed 20 73 24 11 1 1 20 15 23 43 2 2 19 62 22 82 3 3 19 02 22 12 4 4 18 48 21 49 Factory setting 2 5 19 32 22 47 Available static pressure Pa Available static pressure Pa Air flow l s Air flow l s Power input kW Power input kW 40ALZ 020 high pressure option ...

Страница 12: ... pressure option r s 0 Closed 20 42 23 67 1 1 19 91 23 08 2 2 19 37 22 45 3 3 18 87 21 87 4 4 18 28 21 19 Factory setting 4 18 28 21 19 Available static pressure Pa Available static pressure Pa Power input kW Power input kW Air flow l s Air flow l s 40ALZ 024 high pressure option ...

Страница 13: ...equipment damage make sure disconnects are open before electrical connections are made If this action is not taken personal injury may occur Before performing service or maintenance operations on the unit turn off the main power switch to the outdoor unit 38UQZ Electrical shock could cause personal injury During unit operation some of the refrigerant circuit elements could reach a temperature in e...

Страница 14: ...and return air For minimum clearances between the units and walls or roofs see Figs 8 9 and 10 Fig 8 38UQZ 016 024 Rigging hook FRONT VIEW PLAN VIEW Supply air Return air 38UQZ models Fig 7 FLOOR Return air ROOF Control box Return air Table 3 Minimum clearances mm A C 500 Free There must not be any obstacle ceiling or roof near the unit If several units are installed close to each other in the sam...

Страница 15: ...nimum clearances between units mm 38UQZ A B C 016 024 500 700 500 Installation on the ground 38UQZ units can be positioned on the floor of a patio on the ground or on a lawn If installed on the ground or on the lawn they should be mounted on a 100 mm high concrete base that is 100 mm larger than the base unit on all four sides Return air Return air Return air Return air PLAN VIEW PLAN VIEW Return ...

Страница 16: ...ANT Units must be installed in accordance with applicable local national and European installation and safety standards and regulations 40ALZ indoor units These units have been designed for indoor installation connected to supply and return air ducts When selecting the installation site observe the following points Ensure that the condensate water collected in the drain pan is correctly evacuated ...

Страница 17: ...itioning unit air discharge 40ALZ Supply air Return air Return air Supply air Return air Supply air Return air Return air Supply air Legend 1 Side access panel 6 Drive belt s 2 Rear discharge panel 7 Roof panel 3 Top panel 8 Fan pulley 4 Angle iron to attach fan to base 9 Base 5 U bracket Condensate drainage 40ALZ units are supplied with a condensate drain pan with two drain pipes outside diameter...

Страница 18: ...aft and align with the motor using a ruler making sure that it is parallel to the belt see Fig 21 2 Tighten the fan pulley setscrews To adjust the belt tension loosen the motor mounting plate bolts and slide the motor mounting plate until the belt is tight 3 Belt tension see Fig 22 The minimum belt deflection is 10 mm when the force shown in Fig 22 is applied Fig 22 Legend 1 Fixed flange 2 Setscre...

Страница 19: ...gram Voltage to the unit must be within 10 of the nominal given in the electrical data table with a maximum phase imbalance of 2 Contact your local power company for correction of an incorrect line voltage Take special care when making the earth connection This is the first cable to be connected and it must be longer than the live cables Operation of the unit on improper line voltage consti tutes ...

Страница 20: ...am accom panying the unit and the thermostat installation instruction NOTE Refer to the applicable thermostat installation manuals for each model refrigerant line connections Connection between units The 38UQZ outdoor units must be connected with the 40ALZ indoor units with refrigerant grade copper pipes for correct operation For each compressor in the 38UQZ outdoor unit a pipe for refrigerant gas...

Страница 21: ...d ascen ding in heat pump mode and is calculated as explained later Indoor unit above the outdoor unit Fig 26 For heat pump units this type of installation limits the height difference between the units and the discharge line speed is approximately half of the suction line speed The suction line flow is descending in cooling mode so that the oil flow is not so problematic The most unfavourable con...

Страница 22: ...nd it is checked if the diameter applies to the suction line if this is descending The suction and discharge lines must comply with the following points Maximum admissible pressure loss for the total length 20 kPa 3 psi Minimum velocity in ascending sections 6 m s Horizontal or descending sections the velocity can be between 4 and 6 m s Maximum line velocity 15 m s The horizontal sections must hav...

Страница 23: ...ting the refrigerant lines carefully follow the steps below Remove the nitrogen holding charge from the refrige rant circuits Use silver alloy rod for soldering purposes and ensure that this work is done in a nitrogen atmosphere Check the pipes for leaks before welding the joint to the unit pipes Once these connections have been made carry out another leak test refrigerant charge The 38UQZ and 40A...

Страница 24: ...dered refrigerant lines and that the refrigerant and oil charges are correct Check the 40ALZ drain connection and that the water is drained correctly Ensure that the unit is level and well supported Check for proper fan rotation direction Check the condition of the ductwork in case damage has occurred during installation The air filter should be clean and in place All the panels should be fitted a...

Страница 25: ...n the 38UQZ unit control box High pressurestat This protects the unit against excessive condensing pressure The high pressurestat has factory fixed non adjustable settings To check see section Initial checks Low pressurestat This protects the 40ALZ units against excessive low pressure in the evaporator or in the refri gerant lines It is not operational in heat pump mode The low pressurestat has fa...

Страница 26: ...compressor and the unit Ensure that no faulty contacts exist in the terminal blocks contactor boards etc Make sure that all the electrical connections are properly tightened and that all the electrical components contactors relays etc are firmly secured to the corresponding rails Pay special attention to the condition of the connecting cables between the control elements and the electrical box and...

Страница 27: ...rwise the new compressor will also be damaged In order to remove the acid proceed as follows a Thoroughly clean the refrigerant circuit using dry nitrogen in the opposite direction to the refrigerant flow or another cleaning element Also carefully clean the separate parts of the refrigerant circuit Install anti acid filters in the liquid line Solder the refrigerant lines Evacuate the lines and cha...

Страница 28: ...Spain Manufacturer reserves the right to change any product specifications without notice Printed in the Netherlands FINAL RECOMMENDATIONS The unit you have purchased has undergone strict quality control procedures before leaving the factory All components including the control systems and electrical equipment etc are certified by our Quality Control Depart ment and tested under the harshest possi...

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