York IDH072B21S Series Installation And Maintenance Manual

York IDH072B21S Series Installation And Maintenance Manual Manual pdf 28 page image

24 P01432Q-rev.18.3 Position of Electrical Wiring Connection• The electrical wiring connection for the indoor unit is shown in Section 8.2.2.• The connection at the terminal block for the indoor unit is shown in the figure below. Check the outdoorunit for the combination before the wiring work. The screws at the terminal block should be performedaccording to the tightening torque as shown in the table below.Tightening Torque for TerminalsScrew Size Tightening TorqueTB1 M4 0.7 - 1.0(1.0 - 1.3ft·lbsN·m)TB2 M3.5 0.9(1.2ft·lbsN·m)(A)(B)(C)ScrewNOTICETerminal Block for Power Supply WiringTB1Terminal Block for Communication CableTB2L1 L2 1 2 A B● Do not connect the main power supply wiring to the communicationline (Terminals A, B, 1 and 2 of TB2). If these are connected, theprinted circuit board (PCB) will be destroyed.● Note the following for wire connections at TB1 and TB2:(A) Attach a piece of insulation tape or sleeve at each terminal.(B) Maintain a safe distance between the electrical box and theterminals to prevent a short circuit.(C) Maintain a safe distance between the terminals.