York THGD Series Installation Manual

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York THGD Series Installation Manual Manual pdf 8 page image

835961-UIM-D-02138 Johnson Controls Unitary ProductsDEHUMIDIFICATION CONTROLA dehumidification control accessory 2HU06700124 may be used withvariable speed air handlers or furnaces in high humidity areas. Thiscontrol works with the variable speed indoor unit to provide cooling at areduced air flow, lowering evaporator temperature and increasing latentcapacity. The humidistat in this control opens the humidistat contacts onhumidity rise. To install, refer to instructions packaged with the acces-sory. Prior to the installation of the dehumidification control, the jumperacross the HUMIDISTAT terminals on the indoor variable speed air han-dler or furnace CFM selection board must be removed.During cooling, if the relative humidity in the space is higher than thedesired set point of the dehumidification control, the variable speedblower motor will operate at lower speed until the dehumidification con-trol is satisfied. A 40-60% relative humidity level is recommended toachieve optimum comfort.If a dehumidification control is installed, it is recommended that a mini-mum air flow of 325 cfm/ton be supplied at all times.For connection diagrams for all UPG equipment refer to “Low VoltageSystem Wiring” document available online at www.upgnet.com in theProduct Catalog Section.CFM SELECTION BOARD SETTINGSFor proper system operation the CFM Selection control jumpers mustbe set properly.Refer to the Tabular Data Sheet for the recommended air flow settingsfor each size condensing unit.Set the cooling speed per the instructions for the air handler or furnaceby selecting the correct COOL and ADJ taps. Verify the airflow usingthe LED display on the CFM selection board.FIGURE 8: Typical Field Wiring (Air Handler / Electrical Heat) - (Three Phase)FIGURE 9: Typical Field Wiring (Air Handler / Electrical Heat) (Single-Phase)THERMOSTAT INDOOR UNIT OUTDOOR UNITLOW VOLTAGE TERMINAL BLOCKIN AIR HANDLER WITH ELECTRIC HEAT3,4DEFROSTCONTROL1FIELDINSTALLEDJUMPERGND.SCREWCONTACTORT2 T1L2 L1MRYOWGT2E 2R RY YOOW2 WCXGW1GND.LUGPOWER WIRING24V CONTROL WIRING(NEC CLASS 2)JUMPER TERMINALS E AND W TO HEATON FIRST STAGE DURING EMERGENCY HEAT.12 TERMINAL NOT USED ON ALL THERMOSTATS.POWER WIRING208/230-3-60460-3-603 CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNIT FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS.4 CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER.ALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODESREDBLKYELORGBRNPURWHTPOWERSUPPLY208/230-3-60460-3-60T3L3W1/66B or CL or XB or CTHERMOSTAT INDOOR UNIT OUTDOOR UNITLOW VOLTAGE TERMINAL BLOCKIN AIR HANDLER WITH ELECTRIC HEATDEFROSTCONTROLFIELDINSTALLEDJUMPERDEHUMIDIFICATION CONTROL CONNECTION(Humidistat* Jumper must be removed)GND.SCREWCONTACTORT2 T1L2 L1MRL or XYOWGT2E 2R RY YOOW2 WC CX/LGW1BKGND.LUGCIRCUITBREAKER***POWER WIRING24V CONTROL WIRING(NEC CLASS 2)JUMPER TERMINALS E AND W TO HEATON FIRST STAGE DURING EMERGENCY HEAT.TERMINAL NOT USED ON ALL THERMOSTATS. POWER WIRING208/230-1-60230-1-50CHECK THE LOW VOLTAGE TERMINAL BLOCK ON THE INDOOR UNIT FOR THE ACTUAL ARRANGEMENT OF THE TERMINALS.CONNECT POWER WIRING TO TERMINAL BLOCK 3TB ON UNITS WITHOUT ELECTRIC HEAT OR CIRCUIT BREAKER.B or CALL FIELD WIRING TO BE IN ACCORDANCE WITH ELECTRIC CODE (NEC) AND/OR LOCAL CODESREDBLKYELORGWHTPURBRN123413,4W1/66