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LED on board flashing 1 time/second. b. 24V AC between R & B c. 24V AC between Y & B with unit operating d. Defrost initiation when FRC DFT pin is shorted to TEST_COMMON pin. If a defrost control problem is suspected, refer to the service information in control box. Do NOT connect 24 VAC to T1 (ODS-A) terminal. ODS-A thermistor WiLL BE BLOWN. G. COMPRESSOR START UP After all electrical wiring is complete, SET THE THERMO STAT SYSTEM SWITCH IN THE OFF POSITION SO COMPRESSOR WILL NOT RUN, and apply power by closing the system main disconnect switch. This will activate the compressor sump heat (where used). Do not change the Thermostat System Switch until power has been applied for one (1) hour. Following this procedure -will prevent potential compressor overload trip at the initial start-up. @ PiN iDENTiFiCATiON z 0 0 o I k )m LOW FAN 18-BC55D 1-2 |nsta||er's Guide H. OPERATIONAL AND CHECKOUT components, provisions are made for a field installed start kit PROCEDURES accessory. When adding an accessory, follow the instructions provided with the kit. Final phases of this installation are the unit Operational and Checkout Procedures which are found in this instruction on K. OUTDOOR THERMOSTAT page 8. To obtain proper performance, all units must be An outdoor thermostat TAYSTAT250A may be field installed. operated and charge adjustments made in accordance with For data, see wiring diagram attached to unit and instruction procedures found in the Service Facts. sheet packaged with outdoor thermostat. I. ELECTRIC HEATERS L. SEACOAST SALT SHIELD Electric heaters, if used, are to be installed in the air han- All units are shipped with a black Seacoast Salt Shield dling device according to the instructions accompanying the air handler and the heaters. attached to the access panel. Removal of the shield -will potentially shorten the life of the joints in the outdoor coil. J. START CONTROL Some models have quick start components which are factory installed. For models that do not have factory installed start TYPICAL FIELD HOOK=UP DIAGRAM VAR}AB/E SPEED T'STAT AIR HANDLER 2 STAGE HAT PUMP R See Note A I NO]E 8 ODTA ....................................... B BR ....... (I) 0 PRINT D FROM D 54050P01 Notes: 1. Be sure power supply agrees with equipment nameplate. 2. Power wiring and grounding of equipment must comply with local codes. 3. Low voltage wiring to be No. 18 AWG minimum conductor. 4. ODT-B must be set lower than ODT-A. 5. If ODT-B is not used, connect A Jumper wire from W3 to W2. If ODT-A is not used, connect a jumper wire from W2 to W1. 6. If electric heat does not have 3rd contactor (CH), connect a jumper wire from W3 to W2. If electric heat does not have 2nd contactor (BH), connect a jumper wire from W2 to W1. 7. X2 must be connected to variable speed air handler terminal W3, as shown, for proper indoor air flow during the defrost cycle. 8. Be sure the jumper between R and BK is cut or removed. 9. With O and Y/Y2 energized, indoor fan is at 80% airflow. 10. With O, Y/Y2 and BK energized, indoor fan is at 100% airflow. 11. Connect only if used with applicable indoor thermostat. (_) AIR HANDLER G O B W3W2W! [] [][][][] [] e []_[]T Y YIo oi _'dumper See Note B REQUIRED WIRING LEGEND Refer to Field Hook-up Diagrams above. ..... FACTORY WIRING 4TWX6 units require 80% airflow with Y1 (first stage), 100% airflow with Y2 (second stage). Note A -The installer must jumper at the L_/q-B"R" to "O". _ FIELD WIRING Note El-Cut/remove the factory installed "BK" jumper (See Figure 1). Connect "YI" from thermostat to "Y!Y2" at VS Airhandler to "Y1" at Outdoor Unit. Connect "Y2" from thermostat to "BK" at VS Airhandler to "Y2" at Outdoor Unit. 18-BC55D1-2 |nsta||er's Guide 4TWX6 OUTLINE DRAWING NOTE: ALL DIMENSIONS ARE IN IVllVl(INCHES). SERVICE PANEL...................................... ELECIRICA[ AND REFRIGERANF COMPONENTCLEARANCPS PER PREVAILING CODES UNIT SNOULD BE PLACED SO ROOF RUNOFF WAIER DOES NOT POUR D}RECIIY ON UNIT, AND ...

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