Assessments - 1, GPA: 5
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502,673M SOLID STATE DEFROST Dallas,Texas 9/93 REPLACEMENT BOARD Supersedes 3/92 INSTALLATION INSTRUCTIONS FOR SOLID STATE DEFROST REPLACEMENT BOARD LB-83114C (61H42) USED ON HP7-1, ,/SHIPPINGANDPACKING _ ::::: ] Package 1 of 1 contains: 1-Control board on mounting bracket 1-Defrost thermostat 1-Outdoor fan/defrost relay 8-Wires with 3/16" terminals 1-Screw 2-Wire nuts /tNSTA_TiON: : 1-Turn off power supply to unit. 2-Remove compressor access panel and control box cover. A-Defrost Thermostat 3-Disconnect coil thermistor from coil return bend and air thermistor from fan section. Replace coil thermistor with provided defrost thermostat. Secure to liquid line as close as possible to the outdoor coil. NOTE-/t may be necessary to remove the front corner panel for access to coil thermistor, B-Defrost Board 4-Remove and retain screwfrom existing solid state defrost board located in control box. Note existing wiring. See figure 1. 5-Install newcontrol board assembly using existing screw and hole. 6-Drill new hole into control panel and secure with screw provided in kit. C-Outdoor Fan/Defrost Relay 7-Remove outdoor fan/defrost relay. Install replacement outdoor fan/defrost relay. -2, HP8, CliP9 AND CliP10 SERIES UNITS 1-Connect one end of long wire (provided) to "HLD" terminal on the defrost board. Disconnect defrost high pressure switch from between high pressure switch and loss of charge switch. 2-Splice remaining end of long wire to wire between high pressure switch and toss of charge switch where high pressure switch was originally connected. 3-Connect onewire from defrost relaycoitto "OUT" terminal of defrost board. 4-Cut off terminal of remaining wire from defrost relay coil and strip wire 5/8 inch. At a convenient location, splice wire to long wire from "HLD" terminal using a wire nut. 5-Connect wire from defrost thermostat to one of the "24V" terminals on defrost board. IMPORTANT-Make sure defrost thermostat is securely fastened to the fiquid line. 6-Cut off terminal from remaining defrost thermostat wire and strip wire 5/8 inch. Splice with one of the defrost pressure switch wires using a wire nut. 7-Locate blue transformer wire and splice with remaining defrost high pressure switch wire using a wire nut. 8-Connect the remaining existing wire to "COM" terminal on defrost board. 9-Defrost time interval can be selected to defrost every 30, 60 or 90 minutes. This is selected using the jumper on the defrost board. 10-Replace all panels and restore power to unit. Page 1 TOP VIEW FRONT VIEW DEFROST TIME Use existing hole to INTERVAL JUMPER install replacement board _J 6O 0 _o I RST HLD f 9O _ INTERNAL REPLACEMENT 24V JUMPER BOARD OUT REMOVE ®1 COM EXISTING BOARD Drill new hole into control box panel FIGURE 1 TYPICAL WIRING EXISTING TRANSFORMER 24V POWER BLUE WIRE _] HIGH PRESSURE SWITCH LOSS OF , CHARGE ._ SWITCH RST 0 HLD DEFROST 24V * _)-DEFROST THERMOSTAT BOARD DEFROST HIGH PRESSURE OUT (_ SWITCH OUTDOOR FAN AND DEFROST RELAY tOM9 COMPRESSOR CONTACTOR *NO TE--No external/umper ts requtred for 24VAC terminals. The 2,4V terminals are jumpered lnternal/}z Either termina/ may be connected to defrost thermostat• EXISTING TRANSFORMER COMMON YELLOW WIRE Page 2 7-Timing Jumper The defrost control is a solid state control manufacturedby Hamilton Standard.The control providesautomaticswitchingfrom normalheating operationto defrostmodeandback.Thedefrost controlcontainsasolidstatetimerwhichswitchesan externa] defrost relay through 1/4" male spades mountedon the control'scircuit board.Thecontrol energizesthedefrostrelayat regular timed intervals. On some units, a normally open defrost switch placed in series between the defrost relay and the control initiates defrost only when needed at the end of the timed intervals. On other units, the control initiates defrost on demand from the defrost thermostat, Defrost Control Components: 1-24V Terminal Terminat 24V receives 24VAC from the control transformer. This terminal powers the control's internal timer and relays. Terminal 24V must be powered at all times to provide HOLD between thermostat demands. COM Terminal Terminal COM provides 24VAC common. 3-HLD Terminal Terminal HLD hold the internal timer in place between thermostat demands and altows the unit to continue timing upon resumption of thermostat demand, tn most units, terminal HLD is connected directly to thermostat demand. 4-OUT Terminal Terminal OUT controls unit defrost when connected...
Este manual também é adequado para os modelos :equipamento de bombagem - LB-83114C (278.8 kb)