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Heating & Air Conditioning
INSTALLATION INSTRUCTIONS
16 SEER
Split System Heat Pump & Air Conditioner
NOTE: Appearance of unit may vary.
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION
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.
DO NOT DESTROY THIS MANUAL
Please read carefully and keep in a safe place for future reference by a serviceman.
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Summary of Contents for Midea 16 SEER
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Page 1: Installation Instructions
Heating & Air Conditioning INSTALLATION INSTRUCTIONS 16 SEER Split System Heat Pump & Air Conditioner NOTE: Appearance of unit may vary. RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION WARNING These instructions are intended as an aid to qualified licensed service personnel for proper installation, adjust- ment and operation of this unit. -
Page 2: Table Of Contents
TABLE OF CONTENTS 1.0 SAFETY........................3 1.1 INSPECTION....................4 1.2 LIMITATIONS....................4 2.0 GENERAL......................4 3.0 UNIT INSTALLATION....................6 3.1 LOCATION.......................6 3.2 GROUND INSTALLATION................6 3.3 ROOF INSTALLATION..................6 3.4 UNIT PLACEMENT..................6 3.5 PRECAUTIONS DURING LINE INSTALLATION..........7 3.6 PRECAUTIONS DURING BRAZING OF LINES..........8 3.7 PRECAUTIONS DURING BRAZING SERVICE VALVE........9 3.8 UNIT MOUNTING...................10 3.9 FACTORY-PREFERRED TIE-DOWN METHOD..........11 3.10 REMOVING THE TOP PANEL AND MOTOR..........12... -
Page 3: Safety
This document is customer property and is to remain with this unit. These instructions do not cover all the different variations of systems nor does it provide for every possible contingency to be met in connection with installa- tion. All phases of this installation must comply with NATIONAL STATE AND LOCAL CODES. -
Page 4: Inspection
1.1 INSPECTION As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier's delivery receipt. A separate request for inspection by the carrier's agent should be made in writing. - Page 5 AIR DISCHARGE: ALLOW 60” MINIMUM CLEARANCE. AIR INLETS LOUVERED PANELS ALLOW 18” MINIMUM CLEARANCE SERVICE ACCESS ALLOW 24” CLEARANCE NOTE: GRILL APPEARANCE MAY VARY. POWER WIRING SEE DETAIL A CONTROL WIRING DETAIL A 7/8” (22.2mm) KNOCKOUT 1-11/32” (34.5mm) HOLE 1-3/32” (27.8mm) SERVICE FITTING SERVICE...
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Page 6: Unit Installation
3.0 UNIT INSTALLATION 3.1 LOCATION Before starting the installation, select and check the suitability of the location for both the indoor and outdoor unit. Observe all limitations and clearance requirements. The outdoor unit must have sufficient clearance for air entrance to the condenser coil, for air discharge and for service access. -
Page 7: Precautions During Line Installation
CAUTION This system uses R410A refrigerant which operates at higher pressure than R-22. No other refrigerant may be used in this system. Gauge sets, hoses, refrigerant containers, and recovery system must be designed to handle R410A. If you are unsure, consult the equipment manufacturer. The outdoor unit must be connected to the indoor coil using field supplied refrigerant grade copper tubing that is internally clean and dry. -
Page 8: Precautions During Brazing Of Lines
Sheet Metal Hanger Insulated Vapor Line Tape Correct Incorrect Insulated Liquid Line Fig.3 Tubing Hanger Fig.4 Underground Installation WEATHERPROOF DISCONNECT POWER SWITCH SUPPLY INDOOR BLOWER COIL Seal opening(s) with permagumor equivalent NOTE:All outdoor wiring must be weather proof Fig.5 Typical Installation 3.6 PRECAUTIONS DURING BRAZING OF LINES All outdoor unit and evaporator coil connections are copper-to-copper and should be brazed with a phosphorous-copper alloy material such as Silfos-5 or equivalent. -
Page 9: Precautions During Brazing Service Valve
CAUTION Dry nitrogen should always be supplied through the tubing while it is being brazed, because the temperature required is high enough to cause oxidation of the copper unless an inert atmosphere is provide. The flow of dry nitrogen should continue until the joint has cooled. Always use a pressure regulator and safety valve to insure that only low pressure dry nitrogen is introduced into the tubing.Only a small flow is necessary to displace air and prevent oxidation. -
Page 10: Unit Mounting
Table 1: Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (ln.) LIQUID SUCTION MODEL SIZE Tube Diameter Tube Diameter 10. Replace cap on service ports. Do not remove the flare caps from the service ports except when necessary for servicing the system. CAUTION Do not connect manifold gauges unless trouble is suspected. -
Page 11: Factory-Preferred Tie-Down Method
BASE PAN (BOTTOM VIEW) DO NOT OBSTRUCT DRAIN HOLES (SHADED) BASE PAD (CONCRETE OR ELEVATION ABOVE ANTICIPATED OTHER SUITABLE SNOW IS NECESSARY MATERIAL) Fig.7 RECOMMENDED ELEVATED INSTALLATION 3.9 FACTORY-PREFERRED TIE-DOWN METHOD Step 1: Prior to installing clear pad of debris. IMPORTANT Then cement pad must be made of HVAC-approved materials and must be the proper thickness to accommodate fasteners. -
Page 12: Removing The Top Panel And Motor
The dimension see FIG.2 SEE DETAIL B Brackets: 2” width, 1/16” thickness, height as required. Available from distributor or in market place. #7 X 3/8” Self Tapping Screws (Don’t Exceed 3/8” long) DETAIL B 1/4” Χ 1-1/2” Hex Washer Head Concrete Screws (3/16”... -
Page 13: Electrical Connections
4.0 ELECTRICAL CONNECTIONS 4.1 GENERAL INFORMATION & GROUNDING Check the electrical supply to be sure that it meets the values specified on the unit nameplate and wiring label. Power wiring, control (Iow voltage) wiring, disconnect switches and over current protection must be supplied by the installer. Wire size should be sized per require- ments. -
Page 14: Evacuation
5.0 EVACUATION It will be necessary to evacuate the system to 500 microns or less. If a leak is suspected, leak test with dry nitrogen to locate the leak. Repair the leak and test again. To verify that the system has no leaks, simply close the valve to the vacuum pump suction to isolate the pump and hold the system under vacuum. -
Page 15: Line Sizing
7.2 LINE SIZING TABLE 2: SUCTION LINE LENGTH/SIZE VS CAPACITY MULTIPLIER(R410A) System Capacity 1 1/2 Ton 2 Ton 2 1/2 Ton 3 Ton 3 1/2 Ton Suction Line Connection Size 3/4" I.D. 3/4" I.D. 3/4" I.D. 7/8" I.D. 7/8" I.D. 5/8 Opt. -
Page 16: Protection Function Introduction
7.3 PROTECTION FUNCTION INTRODUCTION (Heat pump only) Sensor T3 (condenser pipe temperature) and T4 (outdoor ambient temperature) When open-circuit, compressor, outdoor fan motor and reverse valve will be OFF. When T4 is < 5 ° F, the compressor will stop. If the electrical heater kit is installed in the indoor unit, the outdoor unit would provide a signal to drive up the heater. -
Page 17: Manua Defrost Mode
7.5 MANUAL DEFROST MODE (For HP system only) When MANUAL DEFROST switch in PCB is set to “1”, system will perform as above 7.4 description. When the switch is set to “0”, T3 32°F, compressor keeps running and lasting for 40 seconds, the system turns to the Defrost Mode. By the logic of 7.4 to exit the Defrost Mode. -
Page 18: Charging By Weight
If refrigerant lines are sized using the nameplate charge, the correct liquid pressure is found at the intersection of the suction pressure and the outdoor ambient. 1. Remove refrigerant charge if the liquid pressure is above the chart value. 2. Add refrigerant charge if the liquid pressure is below the chart value. 8.2 CHARGING BY WEIGHT For a new installation, evacuation of interconnecting tubing and indoor coil is adequate;... -
Page 19: Wiring Diagram
10.0 WIRING DIAGRAM CAUTION These units must be wired and installed in accordance with all National and Local Safety Codes. COMPRESSOR CONTACTOR COMP COMPRESSOR Terminal Block RC 1 RUN CAPACITOR 1 RC 2 RUN CAPACITOR 2 LINE VOLTAGE FACTORY STANDARD FIELD INSTALLED FACTORY OPTIONAL... -
Page 20: Indoor Unit
Terminal Block Fig.14 Outdoor Unit Wiring Diagram for H/P Systems(208/230V 1P 60Hz). THERMOSTAT INDOOR UNIT OUTDOOR UNIT Fig.15 Control Wiring for H/P Systems. Suggestion: When choosing a thermostat, choose KJR-25B or a non-programmable electric thermostat. Broken lines means H/P system with electric heating. Please refer to thermostat electrical manual for wiring schematic. - Page 21 TABLE 4: Electrical Data: Model Min. Circuit Ampacity(A) Maximum Circuit Protector(A) 12.3 18AC 17.9 24AC 30AC 18.7 36AC 21.9 42AC 23.4 12.3 18HP 24HP 17.9 18.7 30HP 21.9 36HP 23.4 42HP NOTES: AC:Air Conditioner; HP:Heat Pump...
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