Carrier 38GVM Series Installation Instructions Manual

Also see for 38GVM Series: Service manual

Contents

10OUTDOOR UNIT INSTALLATION1. Use a rigid base to support unit in a level position.2. Locate outdoor unit and connect piping and wiring.CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.Excessive torque can break flare nut depending oninstallation conditions.Piping Connections to Outdoor UnitIMPORTANT: Use refrigeration grade tubing ONLY. Noother type of tubing may be used. Use of other types of tubingwill void manufacturer’s warranty.Make sure there is enough piping to cover the required lengthbetween the outdoor and indoor unit.Only use piping suitable for high side pressure for both highside and low side connections.Piping Guide:S Do not open service valves or remove protective caps fromtubing ends until all the connections are made.S Bend tubing with bending tools to avoid kinks and flat spots.S Keep the tubing free of dirt, sand, moisture, and othercontaminants to avoid damaging the refrigerant system.S Avoid sags in the suction line to prevent the formation of oiltraps. Insulate each tube with minimum 3/8--in. (10 mm) wallthermal pipe insulation. Inserting the tubing into the insulationbefore making the connections will save time and improveinstallation quality.1. The unit is equipped with multiple pairs of service valves.Each pair is clearly marked (color and letter) to identify theindoor unit circuits. In the outdoor unit wiring area, eachindoor unit interconnecting terminal block is marked (letter)the same as the corresponding pair of service valves. Theindoor units must be piped and wired in matched sets (A toA; B to B, etc)2. It is not required to use all of the available fan coil connec-tions if the application does not require them at the currenttime. The system can be expanded at any time.3. Conversion joints are supplied with the outdoor unit. Theyare required for certain fan coil combinations. These jointsare to be connected to the outdoor unit as needed to matchthe line set size.4. Cut tubing with tubing cutter.5. Install correct size flare nut onto tubing and make flare con-nection.6. Apply a small amount of refrigerant oil to the flare connec-tion on the tubing.7. Properly align tubing in with service valve (conversionjoint).8. Tighten flare nut and finish installation using two wrenchesas shown in Fig. 14.A07354Fig. 14 --- Tighten Flare NutINSTALL ALL POWER AND INTERCONNECTINGWIRING TO OUTDOOR UNITStrongwindA07350Fig. 15 --- High Wind InstallationOutdoor Unit Wiring Connections1. Mount outdoor power disconnect.2. Run power wiring from main box to disconnect per NECand local codes.3. Remove field wiring cover (if available) from unit byloosening screws.4. Remove knockouts..5. Connect conduit to conduit panel. (See Fig. 16)6. Properly connect both power supply and control lines to ter-minal block per the connection diagram.7. Ground unit in accordance with NEC and local electricalcodes.8. Use lock nuts to secure conduit.9. Reinstall field wiring cover (size 18k only).CAUTION!EQUIPMENT DAMAGE HAZARDFailure to follow this caution may result in equipmentdamage or improper operation.S Be sure to comply with local codes while running wirefrom indoor unit to outdoor unit.S Every wire must be connected firmly. Loose wiring maycause terminal to overheat or result in unit malfunction.A fire hazard may also exist. Therefore, be sure all wiringis tightly connected.S No wire should be allowed to touch refrigerant tubing,compressor or any moving parts.S Disconnecting means must be provided and shall belocated within sight and readily accessible from the airconditioner.S Connecting cable with conduit shall be routed throughhole in the conduit panel.38/40GVM