Trane OXBOX 18 Installation And Operation Manual

Air conditioner 1.5-5 tons r454b up to 15.2 seer2 18-60k with microchannel heat exchanger 61k with copper and fin heat exchanger

Hide thumbs

Table Of Contents

Quick Links

Download this manual

INSTALLATION AND OPERATION MANUAL

Air Conditioner

1.5-5 Tons R454B

UP TO 15.2 SEER2

18-60K With Microchannel Heat Exchanger

61K With Copper and Fin Heat Exchanger

WARNING

Explosion Hazard!

Failure to follow instructions below could result

in an explosion which could result in death or

serious injury, and equipment damage.

NEVER bypass system safeties in order to pump

down the unit component's refrigerant into the

micro channel heat exchanger (MCHE) coil. Do

NOT depress the compressor contactor since it

effectively bypasses the high-pressure control.

Please read this manual carefully and keep it for future reference.

All the pictures in this manual are for illustrations purpose only.

Table of Contents

Troubleshooting

Need help?

Do you have a question about the OXBOX 18 and is the answer not in the manual?

Questions and answers

Summary of Contents for Trane OXBOX 18

Page 1 INSTALLATION AND OPERATION MANUAL Air Conditioner 1.5-5 Tons R454B UP TO 15.2 SEER2 18-60K With Microchannel Heat Exchanger 61K With Copper and Fin Heat Exchanger WARNING Explosion Hazard! Failure to follow instructions below could result in an explosion which could result in death or serious injury, and equipment damage.
Page 2 RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION WARNING WARNING These instructions are intended as an aid to qualified licensed service personnel for proper installation, adjust- ment and operation of this unit. Read these instructions thoroughly before attempting installation or operation. Failure to follow these instructions may result in improper installation, adjustment, service or maintenance possibly resulting in fire, electrical shock, property damage, personal injury or death.
Page 3: Table Of Contents
CONTENTS 1 SAFETY Safety Signs Safety Precautions UNIT LOCATION CONSIDERATIONS Unit Dimensions Refrigerant Line Sizes Required Refrigerant Line Length Location Restrictions Refrigerant Charge and Room Area Limitations 3 UNIT PREPARATION Pre-installation 4 SETTING UP THE UNIT Pad Installation 5 REFRIGERANT LINE CONSIDERATIONS Service Valve Connection Sizes Refrigerant Line Insulation Reuse Existing Refrigerant Lines...
Page 4 14 START UP System Start Up 14.1 15 SYSTEM CHARGE ADJUSTMENT 15.1 Charging: Superheating Charging in Cooling for Piston Match-Ups (above 55 ºF outdoor temp) 15.2 Charging: Subcooling Charging in Cooling for TXV Match-Ups (above 55 ºF outdoor temp) 15.3 Charging: Weigh-In Method 16 SYSTEM OPERATION AND TROUBLESHOOTING Protection Function...
Page 5: Safety
1 SAFETY 1.1 Safety Signs This is the general warning sign. It is used to alert the user to potential hazards. All safety messages that follow this sign shall be obeyed to avoid possible harm. DANGER Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury. WARNING Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.
Page 6: Safety Precautions
1.2 Safety Precautions DANGER HAZARDOUS VOLTAGE Please read before proceeding Failure to follow this warning could result in property damage, severe personal injury, or DANGER death. Disconnect all electric power, Including remote ELECTRICAL HAZARD 380 VOLTS DC disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power Failure to follow this warning could result in cannot be inadvertently energized.
Page 7: Risk Of Fire
WARNING WARNING Risk of electric shock. Can cause injury or death. SERVICE VALVES Disconnect all remote electric power supplies Failure to follow this warning will result in abrupt before servicing. release of system charge and may result in Risk of fire mild. Flammable refrigerant used. To personal injury and/or...
Page 8 WARNING – If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the When repairing the refrigerating system, comply presence of refrigerant. with the following precautions prior to conducting work on the system: – Equipment marking must remain visible and legible.
Page 9 If a leakage of refrigerant which requires brazing In general, R454B doesn't have a siphon tube or is found, all of the refrigerant shall be recovered dip tube into tank. For this situation, they must from the system, or isolated(by means of shut off be charged in liquid form to prevent fractionation valves) in a part of the system remote from the of the blended refrigerant and that requires the...
Page 10 Do not dispose of electrical appliances as When removing refrigerant from a system, either unsorted municipal waste. separate servicing decommissioning, collection facilities. Contact your local recommended that all refrigerants are removed government information regarding safely. connection systems available. When transferring refrigerant into cylinders, If electrical appliances are disposed of in landfills ensure that only appropriate refrigerant recovery or dumps, hazardous substances can leak into...
Page 11 WARNING Signs for similar appliances used in a work area are generally addressed by local regulations and This outdoor unit must combine the indoor unit give the minimum requirements for the provision with a refrigerant leak detection device. of safety and/or health signs for a work location. These instructions are exclusively intended for Storage package...
Page 12: Unit Location Considerations
2.3 Required Refrigerant Line 2 UNIT LOCATION Length CONSIDERATIONS WARNING Total equivalent length(Feet) Liquid line Model (inches) Maximum vertical length(Feet) Ensure that apparatus is mounted securely. 5/16 5/16 2.1 Unit Dimensions 5/16 Unit Dimensions 5/16 Model H(inches) W(inches) L(inches) 24-15/16 23-5/8 23-5/8 5/16...
Page 13: Location Restrictions
Units should be elevated 3-12 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing. Ensure that drain holes in unit base pan are not obstructed, preventing drainage of defrost water (Fig.
Page 14: Refrigerant Charge And Room Area Limitations
2.5 Refrigerant Charge and Room The area of the connected rooms, on the same floor,connected by permanent opening in the walls Area Limitations and/or doors between occupied spaces, including gaps between the wall and the floor, can be considered a single room when determining compliance to Amin, In UL/CSA 60335-2-40, R454B refrigerant is classified provided all of the following conditions are met as Figure...
Page 15 The required minimum room area The minimum opening area for connected rooms Amin/TAmin Amin/TAmin Mmax Anvmin lb-oz lb-oz lb-oz lb-oz 152.1 14.1 33.1 10-2 17-3 6-10 0.14 39.7 10-9 158.7 14.7 17-3 0.13 46.3 165.3 15.4 11-0 17-3 0.12 171.9 16.0 52.9 11-7...
Page 16 If the altitude of installation is higher than 2000 ft, the CAUTION required minimum room area follow as Table 2-9. If the actual room area, air outlet height, and Altitude(ft) refrigerant charge amount are not reflected in 2001- 4001- 6001- 8001- 10001- 12001-...
Page 17: Unit Preparation
NOTE 3 UNIT PREPARATION These instructions are intended to provide a 3.1 Pre-installation method to tie-down system to concrete slab as a securing procedure for high wind areas. Check STEP 1 - Check for damage and report promptly to the Local Codes for tie-down methods and protocols.
Page 18: Refrigerant Line Considerations
5.3 Reuse Existing Refrigerant Lines 5 REFRIGERANT LINE CONSIDERATIONS CAUTION 5.1 Service Valve Connection Sizes If using existing refrigerant lines make certain that all joints are brazed, not soldered. Suction line Liquid line Models connection connection 18/24/30/36 For retrofit applications, where the existing refrigerant lines will be used, the following precautions should be 42/48/60/61 taken:...
Page 19: Refrigerant Line Routing
6 REFRIGERANT LINE ROUTING 6.1 Precautions NOTE Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines. For example: When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers.
Page 20 Wall Sealant Ductwork Insulation Suction Line Bracket Line Set DO NOT hang line sets from ductwork Isolation Through Wall Figure 6-3 To Indoor Coil To Outdoor Unit Insulated Suction Line Liquid Line PVC Conduit Figure 6-4...
Page 21: Refrigerant Line Connection
7 REFRIGERANT LINE 8 REFRIGERANT LINE BRAZING CONNECTION 8.1 Braze the Refrigerant Lines 7.1 Connecting to Refrigerant Lines 1. Remove caps or plugs. Use a deburing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth. WARNING Pipe work and installation shall be in compliance with national codes ASHRAE15.
Page 22: Refrigerant Line Leak Check
4. Wrap a wet rag around the valve body to avoid heat 9 REFRIGERANT LINE LEAK damage and continue the dry nitrogen purge (Fig. CHECK 8-4). Braze the refrigerant lines to the service valves. 9.1 Check for Leaks Check liquid line filter drier’s directional flow arrow to confirm correct direction of refrigeration flow (away 1.
Page 23: Evacuation
10 EVACUATION 11 SERVICE VALVES 10.1 Evacuate the Refrigerant Lines 11.1 Open the Service Valves and Indoor Coil WARNING NOTE Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn Do not open the service valves until the counterclockwise until the valve stem just refrigerant lines and indoor coil leak check and touches the rolled edge.
Page 24: Electrical - Low Voltage
12 ELECTRICAL - LOW VOLTAGE In the U.S.A., wiring must conform with current local, codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC). WARNING Installation and servicing of air conditioning equipment can be hazardous due to internal refrigerant pressure and live electrical components.
Page 25: Low Voltage Wiring
12.2 Low Voltage Wiring electrical control box panel Power wiring electrical control box panel Control wiring Figure 12-1 Figure 12-2 WARNING Low Voltage line must be connected inside the outdoor unit case through control wiring channel on the right. High Voltage line must be connected through power wiring channel on the left.
Page 26: Indoor Unit
For Air Conditioners systems, Y2 only for 61K Terminal THERMOSTAT Terminal CN36 CN14 TO THERMOSTAT INDOOR UNIT OUTDOOR UNIT Figure 12-7 NOTE If there are 2 or more systems (communication) in the same area, make sure the low voltage wires are connected to the right unit that are connected to the same refrigerant line.
Page 27: Electrical - High Voltage
13 ELECTRICAL - HIGH VOLTAGE NOTE Electrostatic discharge can affect electronic In the U.S.A., wiring must conform with current local components. Take care during unit installation codes and the current National Electric Code (NEC). In and service to protect the unit’s electronic Canada, wiring must conform with current local codes controls.
Page 28: High Voltage Wiring
13.3 High Voltage Wiring 14 START UP 14.1 System Start Up 1. Remove the electrical control box panel. Refer to Figure 13-2. 1. Ensure Sections 7, 8, 9, 10, 11, 12, 13, have been completed. Check the electrical wiring again, and check whether the DIP switch meets the electrical control requirements according to the wiring diagram on the...
Page 29: System Charge Adjustment
15 SYSTEM CHARGE For best results the indoor temperature should be kept between 70 ºF to 80 ºF during the install. ADJUSTMENT WARNING 80 ºF Micro-channel units cannot withstand pump down. 70 ºF 15.1 Charging: Superheating Charging in Cooling for Piston Match-Ups (above 55 ºF outdoor temp) Figure 15-2...
Page 30 18K AC Add 2° of Superheat Add 4° of Superheat Use Design Superheat Value Add 2° of Superheat Total Refrigerant Line Length-feet Table 15-2 24K AC Add 4° of Superheat Add 6° of Superheat Add 2° of Superheat Use Design Superheat Value Add 4°...
Page 31 42K AC Add 4° of Superheat Add 2° of Superheat Add 4° of Superheat Add 6° of Superheat Add 2° of Superheat Use Design Superheat Value Add 4° of Superheat Total Refrigerant Line Length-feet Table 15-6 48K AC Add 4° of Superheat Add 2°...
Page 32 R454B Refrigerant Superheat chart Final Superheat (°F) Suction Temp (°F) Suction Gauge Pressure (PSI) Figure 15-5 7. Stabilize the system. Wait 20 minutes for the system condition to stabilize between adjustments. Table 15-9 NOTE When the suction line pressure match the chart, the system is properly charged.
Page 33: Charging: Subcooling Charging In Cooling For Txv Match-Ups (Above 55 ºf Outdoor Temp)
15.2 Charging: Subcooling Charging For best results, the indoor temperature should be kept between 70 ºF and 80 ºF during the install. in Cooling for TXV Match-Ups (above 55 ºF outdoor temp) 1. Check the outdoor ambient temperatures. 80 ºF When the system matches up with TXV, subcooling charging (in cooling mode) is the only recommended 70 ºF...
Page 34 Determine total refrigerant line length, and height (lift) if indoor section is above the condenser. Use the Table15-12 to calculate any additional subcool required for your specific application. SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE Add 10 psig to Subcooling Charging Table Pressure Use Design Subcooling Value Tatal Refrigerant Line Length-Feet Table 15-12...
Page 35: Charging: Weigh-In Method
6. Adjust refrigerant level to attain proper gauge pressure. 15.3 Charging: Weigh-In Method NOTE Weigh-In method can be used for the initial installation, Add refrigerant if the subcooling reading from or anytime a system charge is being replaced. Weigh-In Table 15-13 is lower than the designed value Method can also be used when power is not available from step 4.
Page 36: System Operation And Troubleshooting
16.3 Two-Stage Compressor 16 SYSTEM OPERATION AND (61K AC only) TROUBLESHOOTING The 61K AC Systems feature a two-stage scroll compressor which is controlled by Y1 and Y2. 16.1 Protection Function Y1: 24VAC thermostat input for first stage operation of the unit. T3 = Outdoor Coil Temperature Y2: 24VAC thermostat input/output for second stage operation of the unit.
Page 37: Temperature Sensor Resistance Table
16.4 Temperature Sensor Resistance Table Temperature °F Resistance kΩ Temperature °F Resistance kΩ Temperature °F Resistance kΩ Temperature °F Resistance kΩ 29.87 3.69 106.73 103.25 29.22 3.61 99.89 28.19 9.26 3.53 96.65 27.39 9.03 3.45 93.53 26.61 8.81 3.38 8.59 90.53 25.85 25.12...
Page 38: Error Code Table And Troubleshooting
16.6 Error Code Table and Troubleshooting Code Description Possible Reason T3 sensor fault T3 sensor is short circuit or open circuit T4 sensor fault T4 sensor is short circuit or open circuit Capacity setting not set Capacity setting(SW2) isn't set/Program error R110 resistor or drive chip software fault Fan is failure/Control board in outdoor unit is failure Service valves are not open/Poor heat exchange on...
Page 39: Status Code
16.7 Status Code Code Description Standby Cooling mode Heating mode Forced cooling mode Defrosting mode Abnormal signal Table 16-5 16.8 Parameter Point Check Table To display system parameters, press the “Check” button to index through the series of parameters available. The first time you press the “Check”...
Page 40: Service
17.2 Changing Motor 17 SERVICE When motor requires changing, follow the steps below: Assist owner with processing Warranty cards and/or online registration. STEP 1 - Go into electrical panel, disconnect motor 17.1 Maintenance power lines. Note: Disconnect main power to unit. Severe burns and Dirt should not be allowed to accumulate on the indoor or electrical shock will occur if you do not disconnect main outdoor coils or other parts in the air circuit.
Page 41: Wiring Diagrams
18 WIRING DIAGRAMS WARNING: ELECTRIFICATION ON THE OUTDOOR MAIN Note: To thermostat BOARD, DO NOT TOUCH WHEN POWER IS ON. 1. B terminal is connected and energized for heating operation. WHITE 2. W terminal is energized in defrosting operation. 3. LPC is available only for heat pump model. OUTDOOR YELLOW 4.
Page 42: Checklist
19 CHECKLIST Operational and Checkout Procedures Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units must be operated and charge adjustments made in accordance with procedures found in the Service Facts of the Outdoor Unit. After installation has been completed, it is recommended that the entire system be checked against the following list: 1.
Page 43 TwentyThreeC, LLC Since the manufacturer has a policy of continuous 800 Beaty Street, product and product data improvement, it reserves Davidson,NC, 28036 the right to change the design and specification www.oxboxhvac.com without notice. For more information contact your local dealer (distributor) .

This manual is also suitable for:

Oxbox 24 Oxbox 30 Oxbox 36 Oxbox 42 Oxbox 48 Oxbox 60 ... Show all