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ROUTINE SYSTEM MAINTENANCE

These items should be part of a routine maintenance

program, to be checked every month or two, until a

specific schedule for each can be identified for this

installation:

Quarterly Inspection

and 30 days after initial start)

Indoor section

Condenser coil cleanliness checked.

Return air filter replacement

Outdoor hood inlet filters cleaned

Belt tension checked

Belt condition checked

Pulley alignment checked

Fan shaft bearing locking collar tightness checked

Condensate drain checked

Seasonal Maintenance

These items should be checked at the beginning of each

season (or more often if local conditions and usage

patterns dictate):

Air Conditioning

Condenser fan motor mounting bolts tightness

Compressor mounting bolts

Condenser fan blade positioning

Control box cleanliness and wiring condition

Wire terminal tightness

Refrigerant charge level

Evaporator coil cleaning

Evaporator blower motor amperage

Heating

Power wire connections

Fuses ready

Manual-reset limit switch is closed

Economizer or Outside Air Damper

Inlet filters condition

Check damper travel (economizer)

Check gear and dampers for debris and dirt

SERVICE

Refrigeration System

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in damage to

equipment.
This system uses Puron

refrigerant which has higher

pressures than R-22 and other refrigerants. No other

refrigerant may be used in this system. Gage set,

hoses, and recovery system must be designed to

handle Puron. If you are unsure consult the equipment

manufacturer.

CAUTION

Compressor Oil —

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in damage to

equipment.
The compressor in a Puron system uses a polyolester

(POE) oil. This oil is extremely hygroscopic, meaning

it absorbs water readily. POE oils can absorb 15 times

as much water as other oils designed for HCFC and

CFC refrigerants. Take all necessary precautions to

avoid exposure of the oil to the atmosphere.

CAUTION

Servicing Systems on Roofs With Synthetic Materials —

POE (polyolester) compressor lubricants are known to cause

long term damage to some synthetic roofing materials.

Exposure, even if immediately cleaned up, may cause

embrittlement (leading to cracking) 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 include but are not limited to compressor

replacement,

repairing

refrigerants

leaks,

replacing

refrigerant components such as filter drier, pressure switch,

metering device, coil, accumulator, or reversing valve.

SYNTHETIC ROOF PRECAUTIONARY

PROCEDURE

1. Cover extended roof working area with an imper-

meable polyethylene (plastic) drop cloth or tarp.

Cover an approximate 3.3 x 3.3 m (10 x 10 ft) area.

2. Cover area in front of the unit service panel with a

terry cloth shop towel to absorb lubricant spills and

prevent run-offs, and protect drop cloth from tears

caused by tools or components.

3. Place terry cloth shop towel inside unit immediately un-

der component(s) to be serviced and prevent lubricant

run-offs through the louvered openings in the base pan.

4. Perform required service.
5. Remove and dispose of any oil contaminated material

per local codes.

38A

Содержание 38AUD*12 Series

Страница 1: ...T CL 1 CL 2 SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire electrical shock or other conditions which may cause personal injury o...

Страница 2: ...lied liquid line filter drier at the indoor coil just upstream of the TXV or fix orifice metering device 6 If a suction line fil ter drier is also to be installed install the suction line filter drier...

Страница 3: ...AUZ 07 328 149 128 58 68 31 62 28 70 32 21 00 533 4 19 00 482 6 13 00 330 2 42 36 1076 0 38AUZ 08 353 160 138 63 72 33 65 29 78 35 19 00 482 6 23 00 584 2 13 00 330 2 42 36 1076 0 38AUD 12 499 226 193...

Страница 4: ...1100 Motor Hp 1 4 Diameter 22 Nominal Airflow Cfm Total 6000 Watts Total 610 OUTDOOR COIL Qty 1 NOVATION Face Area sq ft total 17 5 20 5 Rows Fins per inch FPI 1 17 1 17 CONTROLS Pressurestat Setting...

Страница 5: ...560 Nominal Airflow L s 2832 Watts Total 610 OUTDOOR COIL Qty 1 NOVATION Face Area sq m total 1 6 1 9 Rows Fins per Meter Fins m 1 670 1 670 CONTROLS Pressurestat Settings kPa High Cutout 4347 70 Cut...

Страница 6: ...Motor Hp 1 4 Diameter in 22 Nominal Airflow Cfm Total 6 000 Watts Total 610 OUTDOOR COIL Qty 1 NOVATION Face Area sq ft total 25 0 31 8 Rows Fins per inch FPI 1 17 1 17 CONTROLS Pressurestat Settings...

Страница 7: ...nal Airflow Cfm Total 6 000 Watts Total 610 OUTDOOR COIL Qty 1 NOVATION Face Area sq m total 2 3 3 0 Rows Fins per Meter Fins m 1 670 1 670 CONTROLS Pressurestat Settings kPa High Cutout 4347 70 Cut i...

Страница 8: ...Unit Controls 0 Electro Mechanical Controls Factory Assigned A Default Design Rev Catalog Model Number A Initial Rev Discrete Model Number Voltage 9 400 3 50 Refrigerant Options A None B Low Ambient...

Страница 9: ...door unit and hot gas bypass line Relocate sections to mini mize the length of interconnecting tubing Although unit is weatherproof avoid locations that permit water from higher level runoff and overh...

Страница 10: ...Part 3 of the Carrier System Design Manual for additional data and information on equivalent lengths NOTE Equivalent line lengths will vary based on tube diameter Calculate equivalent line length for...

Страница 11: ...e size where applicable NOTE For applications with linear length greater than 100 ft 30 5 m contact your local Carrier representative NOTE 38AUD requires TWO sets of refrigeration piping R 410A Equiva...

Страница 12: ...refully mark each segment and check constantly as piping systems are assembled to avoid piping errors 38AUD unit cannot be field piped as a single circuit tandem system Connecting 40RU to 38AUD The 40...

Страница 13: ...braz ing as been completed The stub tube connections include in SAE service fittings with Schrader valve cores see Fig 9 Before making any brazed connections to the unit service valves remove both Sch...

Страница 14: ...ds according to required operation of the convenience outlet If an always energized convenience outlet operation is desired connect the source leads to the line side of the unit mounted disconnect Che...

Страница 15: ...rmative data plate for MOCP Maximum Over current Protection device size Fig 11 Power Wiring Connections Table 10 American European Wire Conversions All field wiring must comply with the NEC and local...

Страница 16: ...and open the receptacle Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required Press the RESET button to clear the tripped condition Fig 13 Powered C...

Страница 17: ...he thermostat installation instructions 38AUZ Unit 38AUZ unit is a single stage cooling unit If no economizer function is required select a single stage cooling thermostat If an integrated economizer...

Страница 18: ...9 0 30 UNIT SIZE 38AU NOMINAL VOLTAGE VOLTAGE RANGE COMPRESSOR 1 COMPRESSOR 2 OUTDOOR FAN MOTORS ea WITHOUTPOWERD CONVENIENCE OUTLET WITH POWERD CONVENIENCE OUTLET V Ph Hz MIN MAX RLA LRA RLA LRA WATT...

Страница 19: ...securely in place 3 Check that the compressor crankcase heater has been on at least 24 hours 4 Recheck for leaks using the procedure outlined in the Pre Start Up section Leak Test and Dehydration If...

Страница 20: ...fer to Cool ing Charging Charts Fig 19 through Fig 22 Vary refrigerant until the conditions of the chart are met Note that the charging charts are different from the type normally used The charts are...

Страница 21: ...21 Fig 19 38AUZ 07 Charging Chart Fig 20 38AUZ 08 Charging Chart...

Страница 22: ...22 Fig 21 38AUD 12 Charging Chart...

Страница 23: ...23 Fig 22 38AUD 14 Charging Chart...

Страница 24: ...24 Fig 23 Typical 38AUZ Wiring Diagram 50Hz Single Circuit Unit Shown...

Страница 25: ...25 Fig 24 Typical 38AUD Wiring Diagram 50Hz Dual Circuit Unit Shown...

Страница 26: ...valve closes CADM initiates a TRIP event cooling demand sensed at CADM terminal Y but no current is measured at T1 T2 T3 motor sensors CADM relay opens and RED LED is illuminated TRIP condition mainta...

Страница 27: ...ing and evaporator coil to admit initial refrigerant charge into the low side of the system and when checking and adjusting the system refrigerant charge When service activities are completed ensure t...

Страница 28: ...provided for each Alert code Reset of the ALERT may be automatic or manual If the fault condition causing the Alert is self corrected the Alert code will be removed and the CADM will automatically res...

Страница 29: ...ng Yellow ALERT Flash Code 3 Short Cycling Compressor is running only briefly LOCKOUT 1 If low pressure switch is open a Low refrigerant charge b Evaporator blower is not running c Evaporator coil is...

Страница 30: ...stant nominal 24VAC power supply The wiring to the module s R and C terminals must be directly from the control transformer The module cannot receive its power from another device that will interrupt...

Страница 31: ...ypical Exterior Single Circuit Unit 38AUZ 08 shown Fig 28 Typical Interior Single Circuit Unit 38AUZ 08 shown Condenser Fans Service Valves HPS LPS High Flow Access Port 32LT Sensor Typical Location O...

Страница 32: ...9 Typical Exterior Two Circuit Unit 38AUD 14 shown Fig 30 Typical Interior Two Circuit Unit 38AUD 14 shown Condenser Fans Service Valves HPS LPS High Flow Access Ports Motormaster Sensor Location Outd...

Страница 33: ...acetylene and thus provides more flexibility when working on aluminum the flame temperature is still higher than the melting temperature of aluminum so user caution is required Follow instructions car...

Страница 34: ...Confirm rotation correct if necessary 3 Airflow restricted 3 Remove obstruction 4 Air recirculating 4 Clear airflow area 5 Noncondensables in system 5 Recover refrigerant and recharge as required 6 Re...

Страница 35: ...ant 2 Control contacts fused 2 Replace control 3 Air in system 3 Purge and evacuate system 4 Partially plugged expansion valve or filter drier 4 Clean or replace SYSTEM IS NOISY 1 Piping vibration 1 S...

Страница 36: ...ated working pressures greater than 600 psig Do not install a suction line filter drier in liquid line POE oils absorb moisture rapidly Do not expose oil to atmosphere POE oils may cause damage to cer...

Страница 37: ...37 APPENDIX C MOTORMASTER SENSOR LOCATIONS Fig 32 38AUZ 07 08 Motormaster Sensor Locations Fig 33 38AUD 12 14 Motormaster Sensor Locations 508 mm 20 in Sensor 254 mm 10 in Sensor...

Страница 38: ...10 W Morris St Indianapolis IN 46231 Printed in U S A Edition Date 12 09 Catalog No 38AU C01SI Manufacturer reserves the right to change at any time specifications and designs without notice and witho...

Страница 39: ...S WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE Y N ARE PROPER AIR FILTERS IN PLACE Y N HAVE FAN AND MOTOR PULLEYS BEEN CHECKED FOR PROPER ALIGNMENT Y N DO THE FAN BELTS HAVE PROPER TENSIO...

Страница 40: ...DOTTED LINE CHECK INDOOR UNIT FAN SPEED AND RECORD CHECK OUTDOOR UNIT FAN SPEED AND RECORD AFTER AT LEAST 10 MINUTES RUNNING TIME RECORD THE FOLLOWING MEASUREMENTS Circuit A Circuit B SUCTION PRESSUR...

Страница 41: ...23 Heating 23 ROUTINE SYSTEM MAINTENANCE 24 Quarterly Inspection and 30 days after initial start 24 Seasonal Maintenance 24 SERVICE 24 33 Refrigeration System 24 Compressor Oil 24 Servicing Systems on...

Страница 42: ...and or equipment damage PuronR R 410A refrigerant systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or components on Puron refrigerant equipment WARNING...

Страница 43: ...RD Failure to follow this caution may result in equipment damage or improper operation Never install suction line filter drier in the liquid line of a PuronR system CAUTION 7 If required install a 100...

Страница 44: ...Corner C Corner D Center of Gravity Unit Height kg lbs lbs kg kg lbs kg lbs kg lbs X Y Z H 38AUD 25 409 900 216 475 26 5 58 110 242 57 125 946 1 mm 37 25 in 590 5 mm 23 25 in 383 3 mm 15 10 in 1279 2...

Страница 45: ...560 Nominal Airflow L s 3933 5506 Watts Total 810 960 CONDENSER COIL Qty 2 NOVATION 2 RTPF Face Area sq m total 4 6 4 6 Rows Fins per Meter Fins m 1 670 2 670 Storage Capacity A B kg 3 0 3 0 9 5 9 5...

Страница 46: ...1100 Motor Hp 1 4 1 4 Diameter 22 22 Nominal Airflow Cfm Total 8 300 11 700 Watts Total 810 960 CONDENSER COIL Qty 2 NOVATION 2 RTPF Face Area sq ft total 50 50 Rows Fins per inch FPI 1 17 2 17 Stora...

Страница 47: ...r u t c a f u n a M 5 r e b m u n l a i t n e u q e S 6 10 1 2 3 4 5 6 7 8 9 10 0 5 1 0 G 1 2 3 4 5 POSITION NUMBER TYPICAL Year of manufacture 10 2010 3 4 C10068 Fig 4 Serial Number Nomenclature Matc...

Страница 48: ...f ANSI NFPA 70 American National Standards Institute National Fire Protection Association latest revision for special installation requirements S Allow sufficient space for airflow clearance wiring re...

Страница 49: ...ons for additional details on refrigeration specialties devices Determine equivalent line length adjustments for path and components and add to linear line lengths See Table 4 Equivalent Lengths for C...

Страница 50: ...ing size inches OD Max Lift Maximum liquid lift indoor unit ABOVE outdoor unit only at maximum permitted liquid line pressure drop S Linear Length Less than 30 m 100 ft Minimum 1 1 C 2 0 F subcooling...

Страница 51: ...oil segment changes as the arrangement of the 40RU changes In a vertical arrangement the 40RU s lower coil segment is segment 2 this segment should be connected to the 38AUD s Circuit 1 In a horizonta...

Страница 52: ...ONTROL LIQUID LINE SOLENOID VALVE Evaporator capacity control via liquid solenoid valve is not recommended for use with 38AUD models MAKE PIPING CONNECTIONS Piping connections at the 38AUD unit are ba...

Страница 53: ...Refer to the instructions shipped with the accessory Step 7 Complete Electrical Connections ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Do not use...

Страница 54: ...ion Units With Disconnect Option 2 4 6 1 3 5 L1 L2 L3 Optional Disconnect Switch Disconnect factory test leads discard Factory Wiring 11 13 L1 L2 L3 C1 TB1 Disconnect C10074 Fig 11 Power Wiring Connec...

Страница 55: ...llation instructions for additional features which might require additional conductors in the cable For wire runs up to 15 m 50 ft use no 18 AWG American Wire Gage insulated wire 35 C minimum For 15 t...

Страница 56: ...or HACR breaker 2 The MCA values are calculated in accordance with the NEC Article 440 3 Motor RLA and LRA values are established in accordance with Underwriters Laboratories UL Standard 1995 4 Unbal...

Страница 57: ...ressures do not equalize readily charge vapor on low side of system to assure charge in the evaporator Refer to GTAC II Module 5 Charging Recover Recycling and Reclamation for liquid charging procedur...

Страница 58: ...s later Advanced Scroll Temperature Protection will reset automatically before the motor protector resets which may take up to 2 hours START UNIT Set the space thermostat to a set point above space te...

Страница 59: ...40 00 590 00 640 00 Pressure at Liquid Valve psig Temperature at Liquid Valve F 38AUD 16 Charging Chart Puron Circuit 2 All Condenser Fans Operating 30 00 50 00 70 00 90 00 110 00 130 00 150 00 140 00...

Страница 60: ...90 00 440 00 490 00 Pressure at Liquid Valve psig Temperature at Liquid Valve F 38AUD 25 Charging Chart Puron Circuit 2 4 Condenser Fans Operating 30 00 40 00 50 00 60 00 70 00 80 00 90 00 100 00 110...

Страница 61: ...21 C10084 Fig 18 Typical 38AUD 16 Wiring Diagram 38AUD...

Страница 62: ...22 C10085 Fig 19 Typical 38AUD 25 Wiring Diagram 38AUD...

Страница 63: ...line solenoid valve LLSV2 opens and Circuit 2 compressor starts As space cooling load is satisfied thermostat outputs Y2 and Y1 are de energized removing 24 v at 38AUD terminals Y2 and Y1 Circuit 2 co...

Страница 64: ...e equipment manufacturer CAUTION Compressor Oil EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in damage to equipment The compressor in a Puron system uses a polyolester POE oil Thi...

Страница 65: ...alve core s bottom o ring Install the fitting body with 1085 23 N cm 96 10 in lbs of torque do not overtighten Comfort Alert Diagnostic Module The Comfort Alert Diagnostic Module CADM monitors and ana...

Страница 66: ...LPS or HPS opening and de energizing the compressor contactor the compressor motor internal overload opens or other internal power interruption has occurred Reset of the TRIP LED requires that unit ma...

Страница 67: ...Yellow ALERT Flash Code 3 Short Cycling Compressor is running only briefly LOCKOUT 1 If low pressure switch is open a Low refrigerant charge b Evaporator blower is not running c Evaporator coil is fr...

Страница 68: ...ed 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 wired Verify voltage at contactor coil falls below 0 5VAC when...

Страница 69: ...29 Condenser Fans Motors Service Valves Access Panel Control Box Compressors C10087 Fig 22 38AUD Size 16 Cabinet C10095 Fig 23 38AUD 16 Piping 38AUD...

Страница 70: ...30 Condenser Fans Motors Service Valves Access Panel Control Box Compressors C10089 Fig 24 38AUD Size 25 Cabinet CKT 2 CKT 2 CKT 1 CKT 1 HPS LPS HPS LPS C10090 Fig 25 38AUD 25 Piping 38AUD...

Страница 71: ...31 C10088 Fig 26 38AUD 16 Compressor Assembly Rear View C10091 Fig 27 38AUD 25 Compressor Assembly Rear View 38AUD...

Страница 72: ...9 The repair procedure requires the use of MAPP gas and torch must be supplied by servicer instead of conventional oxyacetylene fuel and torch While the flame temperature for MAPP is lower than that o...

Страница 73: ...a water stream such as a garden hose against surface loaded coil will drive the fibers and dirt into the coil making cleaning efforts more difficult Surface loaded fibers must be completely removed p...

Страница 74: ...firm rotation correct if necessary 3 Airflow restricted 3 Remove obstruction 4 Air recirculating 4 Clear airflow area 5 Noncondensables in system 5 Recover refrigerant and recharge as required 6 Refri...

Страница 75: ...2 Control contacts fused 2 Replace control 3 Air in system 3 Purge and evacuate system 4 Partially plugged expansion valve or filter drier 4 Clean or replace SYSTEM IS NOISY 1 Piping vibration 1 Supp...

Страница 76: ...fied liquid line filter driers with rated working pressures greater than 4137kPa 600 psig S Do not install a suction line filter drier in liquid line S POE oils absorb moisture rapidly Do not expose o...

Страница 77: ...ORMASTER SENSOR LOCATIONS Motormaster Sensor 254 mm 10 in C10093 Fig 29 Motormaster Sensor Location 38AUD 16 Motormaster Sensor Must be positioned on Vapor Stub C10094 Fig 30 Motormaster Sensor Locati...

Страница 78: ...10 W Morris St D Indianapolis IN 46231 Printed in U S A Edition Date 01 10 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catal...

Страница 79: ...RE ALL WIRING TERMINALS including main power supply TIGHT Y N HAS CRANKCASE HEATER BEEN ENERGIZED FOR 24 HOURS Y N INDOOR UNIT HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE Y N ARE PRO...

Страница 80: ...SUREMENTS CIRCUIT 1 CIRCUIT 2 SUCTION PRESSURE SUCTION LINE TEMP LIQUID PRESSURE LIQUID LINE TEMP ENTERING OUTDOOR UNIT AIR TEMP LEAVING OUTDOOR UNIT AIR TEMP INDOOR UNIT ENTERING AIR DB dry bulb TEMP...

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