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Carrier 38AUM Series, Инструкция по установке, эксплуатации и обслуживанию, Страница: 12 / 44

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40RUM 

Arrangement 

Cooling Stage 

40RUM Coil 

Segment 

Connect to 38AUMD 

Vertical 

Y1 

2 

Circuit 1 

Y2 

1 

Circuit 2 

Horizontal 

Y1 

1 

Circuit 1 

Y2 

2 

Circuit 2 

 

 

 

 

 

 

 

 

 

 

 

 

Fig: - Typical Evaporator Coil Connections (40RUM)

 

Install Filter Drier(s) and Moisture Indicator(s)  

Every unit MUST have a filter drier in the liquid line. 38AUMD models require two filter driers (one in each liquid line). 

Locate the filter drier(s) at the indoor unit, close to the evaporator coil’s thermal expansion valve (TXV) inlets. 

Installation of liquid line moisture indicating sightglass in each circuit is recommended. Locate the sightglass(es) 

between the outlet of the filter drier and the TXV inlet. In some applications, depending on space and convenience 

requirements, it may be desirable to install 2 filter driers and sight glasses in a single circuit application. One filter drier 

and sight glass may be installed at A locations

 

 

Select the filter drier for maximum unit capacity and minimum pressure drop. Complete the refrigerant piping from the 

indoor unit to the outdoor unit before opening the liquid and suction lines at the outdoor unit. 

 

Fig: - Location of Sight Glass(es) and Filter Driers Typical 38AUMZ Systems 

 

Page 12

Содержание 38AUM Series

Страница 1: ...handler s offer a wide variety of options for your HVAC application needs Whether it s first cost with the 38AUM single compressor models or superior part load performance from the two compressor mod...

Страница 2: ...t serious hazards which will result in severe personal injury of death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may r...

Страница 3: ...hes and other ignition sources away from refrigerants and oils Before performing service or maintenance operations on unit always turn off main power switch to unit and install lockout tag Unit may ha...

Страница 4: ...6 Refrigeration System No of Ckt No of Comp Type Initial Charge per Circuit kg 3 50 3 70 3 20 3 20 4 10 4 40 5 70 5 25 Operating Charge per Circuit kg 5 80 6 20 5 29 5 29 6 99 7 39 9 50 8 75 Metering...

Страница 5: ...or concrete walls and other grounded surfaces Control box side 42 inches per NEC 2 With exception of the clearance for the outdoor coil as stated in note 1B are movable fence or barricade requires no...

Страница 6: ...nded surfaces Control box side 36 inches per NEC F Between unit and block or concrete walls and other grounded surfaces Control box side 42 inches per NEC 2 With exception of the clearance for the out...

Страница 7: ...op A 1 1 8 inch OD suction line is rated at 53 higher tons with Puron than with R 22 at 2 pressure drop Refrigeration lines selected for R 22 use are typically oversized for Puron applications Careful...

Страница 8: ...3 Check for possible overhead obstructions which may interfere with unit lifting or rigging Step 1 Plan for Unit Location Select a location for the unit and its support system pad rails or other that...

Страница 9: ...nd foliage from obstructing airflow Step 4 Rig and Mount the Unit Rigging These units are designed for overhead rigging Refer to the rigging label for preferred rigging method Spreader bars are not re...

Страница 10: ...A liquid lift condition exists when the outdoor unit is located below the indoor evaporator unit and liquid flows vertically up in a portion of the liquid line The vertical column of liquid reduces th...

Страница 11: ...and will be the first circuit on and last circuit off Circuit 2 is controlled by the thermostat s Y2 or TC2 contact and this circuit is always the lag circuit See Fig 38AUMD Service Valve Locations fo...

Страница 12: ...n of liquid line moisture indicating sightglass in each circuit is recommended Locate the sightglass es between the outlet of the filter drier and the TXV inlet In some applications depending on space...

Страница 13: ...ging control via direct thermostat control of a liquid solenoid valve on the evaporator s second stage circuit is not possible with 38AU models If this installation is a retrofit for a unit that inclu...

Страница 14: ...that refrigerant always be removed from the cylinder as a liquid Admit liquid refrigerant into the system in the discharge line If adding refrigerant into the suction line use a commercial metering ex...

Страница 15: ...ctor and terminal block and equipment ground Provide a ground fault and short circuit over current protection device fuse or breaker per NEC Article 440 or local codes Refer to unit informative data p...

Страница 16: ...vary according to the specific construction details of the indoor section air handler or packaged fan coil Fig Typical Remote Thermostat Connection depict typical connections to a Carrier 40RUM fan co...

Страница 17: ...arger than no 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat PremierLink accessory installation Refer to Form 33CS 58SI for details...

Страница 18: ...ture so there is no demand for cooling 2 Close the field disconnect Preliminary Charge Before starting the unit charge liquid refrigerant into the high side of the system through the liquid service va...

Страница 19: ...Connect service gages to the suction and liquid pressure fittings 2 Energize the compressor 3 The suction pressure should drop and the liquid pressure should rise as is normal on any start up Compress...

Страница 20: ...t the pressure gage to the service port on the liquid line service valve Mount the temperature sensing device on the liquid line close to the liquid line service valve and insulate it so that outdoor...

Страница 21: ...ay period has not expired CADM1 relay will remain open de energizing Solenoid Valve Relay 1 SVR1 and preventing compressor start When safety pressure switches are closed and CADM1 time delay expires C...

Страница 22: ...ing to occur in one year or more When performing any service which may risk exposure of compressor oil to the roof take appropriate precautions to protect roofing Procedures which risk oil leakage inc...

Страница 23: ...nd an integral spring closed check valve core screwed into the base See Fig 35 This check valve is permanently assembled into this core body and cannot be serviced separately replace the entire core b...

Страница 24: ...pause and the repeat the process The number of blinks defined in Table LED Status Codes correlates to a particular abnormal condition troubleshooting tips are provided for each Alert code Reset of the...

Страница 25: ...c Evaporator coil is frozen d Faulty metering device e Condenser coil is dirty f Liquid line restriction filter drier blocked if present Yellow ALERT Flash Code 3 Short Cycling Compressor is running...

Страница 26: ...odule s Y terminal is connected Verify Y terminal is connected to 24VAC at contactor coil Verify 24VAC is present across Y and C when thermostat demand signal is present If not R and C are reverse wir...

Страница 27: ...re to clean the coils may result in reduced durability in the environment Avoid the use of Coil brighteners Acid cleaning prior to painting High pressure washers Poor quality water for cleaning Totali...

Страница 28: ...ghly wet finned surfaces with clean water Be careful not to bend the fins 5 Mix Totaline environmentally sound coil cleaner in a 21 2 gallon garden sprayer according to the instructions included with...

Страница 29: ...19 19 9 20 2 21 1 Liquid Line 1 2 1 2 1 2 1 2 1 2 Max Lift ft 25 50 75 54 45 Suction Line 7 8 7 8 7 8 7 8 7 8 Charge Ibs 20 9 19 3 21 9 20 3 25 7 24 1 24 5 22 9 25 7 24 1 Legend Equivalent Length Equi...

Страница 30: ...oor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection Example Supply Voltage is 400V 3ph 60Hz Maximum Deviation From Average Voltage Average Volta...

Страница 31: ...TYPICAL WIRING SCHEMATIC 38AUMZ07 08 Page 31...

Страница 32: ...TYPICAL WIRING SCHEMATIC 38AUMD12 14 Page 32...

Страница 33: ...TYPICAL WIRING SCHEMATIC 38AUMD16 Page 33...

Страница 34: ...CHARGING CHARTS Page 34...

Страница 35: ...CHARGING CHARTS cont CHARGING CHARTS cont CHARGING CHARTS cont CHARGING CHARTS cont CHARGING CHARTS cont CHARGING CHARTS cont CHARGING CHARTS cont Page 35...

Страница 36: ...CHARGING CHARTS cont Page 36...

Страница 37: ...CHARGING CHARTS cont Page 37...

Страница 38: ...line filter driers with rated working pressures less than 600 psig Do not leave R 410A refrigerant suction line filter driers in line longer than 72 hours Do not install a suction line filter drier in...

Страница 39: ...e leak repair and recharge Air in system Recover refrigerant evacuate system and recharge Condenser coil dirty or restricted Clean coil or remove restriction Dirty drier filter Replace filter Dirty co...

Страница 40: ...heck if the accurater device is installed in fan coil unit Outdoor Unit Check power supply to see if it matches the unit data plate Are fresh batteries intalled properly in the fan coil remote control...

Страница 41: ...NOTES Page 41...

Страница 42: ...NOTES Page 42...

Страница 43: ...NOTES Page 43...

Страница 44: ...s to discontinue or change at any time specifications or designs without notice and without incurring any obligations Supersedes Version 38AUM 50Hz IOMV2 Catalog Number 38AUM 50Hz IOMV3 Effective Date...

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