Carrier 40VMM007A 3 Series Installation And Maintenance Instructions Manual

21ACB Interface — The ACB interface is a dry contactboard that can output up to four signal controlling devices.Refer to Fig. 22, 23, and 32 for connecting the ACB interfaceboard and devices.Fig. 32 —ACB InterfaceSTART-UPPre-Start Check — Once installation is complete, makethe following pre-start checks:1. All indoor and outdoor units are properly installed.2. All piping and insulation is complete.3. All electrical connections (both power and control) areproperly terminated.4. All condensate drains are installed correctly.5. The power supply is the right voltage and frequency.6. The units are properly grounded in accordance withcurrent electrical codes.7. Suction and liquid line service valves are in the openposition.Drain Pump and Drainage Test — Follow thesesteps to perform the test:1. Remove the test cover by rotating it counter-clockwise asshown in Fig. 33.Fig. 33 —Test Cover2. Use a piece of tubing or pipe to fill the drain pumpreservoir with 70 oz. of water as shown in Fig. 34 below.Fig. 34 —Tube/Pipe Insert3. Turn the unit ON in cooling mode. The pump comes on.Watch the end of the drain pipe for any water. It may taketime for the water to travel depending on the length of thedrain pipe.4. During this test, check any bends or joints for leakage.System Operation Check — Once the installationand pre-start checks are complete, perform the following steps:1. Using the remote controller, select cooling or heatingmode to check the operation of the system.2. While the system is in operation, check the following onthe indoor unit:a. Switches or buttons on the remote controller areeasy to push.b. Indicator light is showing normal operation and noerror is indicated.c. Swing mode of air louvers is working (ifapplicable to unit).d. Drain pump operation is normal (if applicable).e. No abnormal vibration or noise.IMPORTANT: The system can connect 64 indoor unitswith different system addresses. If two indoor units in thesame system have identical addresses, abnormal operationwill occur.LEGENDACB — Auxiliary Control BoardFAN — Output for fan OperationCTON — Output for Cooling OperationHTON — Output for Heating OperationMAX AMPS 1AMAX VOLTAGE 24VCN50CN51ACB interfaceFAN CTON HTON AUXHCLOSEDOPENEDOOCSLPENTest CoverTube/Pipe