Lennox International Inc 61H42 Users Manual
LENNOX Controls and HVAC Accessories Manual L0806361 LENNOX Controls and HVAC Accessories Owner's Manual, LENNOX Controls and HVAC Accessories installation guides
61H42 L0806361
61H42 to the manual 8c17f0dc-b287-4a62-8370-40cd8af32c02
2015-02-09
: Lennox-International-Inc Lennox-International-Inc-61H42-Users-Manual-571022 lennox-international-inc-61h42-users-manual-571022 lennox-international-inc pdf
Open the PDF directly: View PDF 
.
Page Count: 4
| Download | |
| Open PDF In Browser | View PDF |
HEAT PUMP ©1993 Lennox Industries Inc. KITS AND ACCESSORIES SOLID STATE DEFROST REPLACEMENT BOARD 502,673M 9/93 Dallas,Texas Litho U,S,A. Supersedes 3/92 INSTALLATION INSTRUCTIONS FOR SOLID STATE DEFROST REPLACEMENT LB-83114C (61H42) USED ON HP7-1, -2, HP8, CliP9 AND CliP10 SERIES ,/SHIPPINGANDPACKING _ : : :: :] Package 1 of 1 contains: 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. 1- Control board on mounting bracket 1- Defrost thermostat 1- Outdoor fan/defrost relay 8- Wires with 3/16" terminals 1- Screw 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. 2- Wire nuts /tNSTA_TiON: : 3- Connect onewire from defrost relaycoitto terminal of defrost board. 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. 5- Connect wire from defrost thermostat the "24V" terminals on defrost board. Board 5- Install newcontrol screw and hole. C-Outdoor Fan/Defrost 7- board assembly using existing 6- Drill new hole into control screw provided in kit. panel and secure with Relay 7- Remove outdoor fan/defrost replacement outdoor fan/defrost relay. relay. Install to one of IMPORTANT-Make sure defrost thermostat is securely fastened to the fiquid line. 6- 4- Remove and retain screwfrom existing solid state defrost board located in control box. Note existing wiring. See figure 1. "OUT" 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. NOTE-/t may be necessary to remove the front corner panel for access to coil thermistor, B-Defrost BOARD UNITS 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. Locate blue transformer remaining defrost high using a wire nut. wire and splice with pressure switch wire 8- Connect the remaining existing terminal on defrost board. wire to "COM" 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 Page 1 all panels and restore power to unit. TOP VIEW FRONT VIEW DEFROST TIME INTERVAL JUMPER Use existing hole to install replacement board f REPLACEMENT BOARD 9O 6O _J 0 I _o RST HLD 24V OUT ®1 REMOVE EXISTING BOARD _ INTERNAL JUMPER COM 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 BOARD 24V * _)- DEFROST THERMOSTAT OUT (_ tOM9 OUTDOOR FAN AND DEFROST RELAY DEFROST HIGH PRESSURE SWITCH 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 The defrost control is a solid state control manufacturedby Hamilton Standard.The control providesautomaticswitchingfrom normal heating operationto defrost mode and back.The defrost controlcontainsa solidstatetimerwhich switchesan externa] defrost relay through 1/4" male spades mountedon the control'scircuit board.Thecontrol energizesthe defrostrelayat regular timed intervals. 7- Timing Jumper A factory installed jumper on the circuit board connects terminal Wl on the circuit board to one of the three timing pins. 8- TST Pins Each board is equipped with a test pins for use in troubleshooting the unit. When jumpered together, these pins reduce the control timing to about 1/256 original time. A CAUTION 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. 2 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 to one side of the defrost relay coil. An internal relay connected to terminal OUT closes to allow external defrost relay to energize and initiate defrost. At the end of the defrost period, the internal relay connected to terminal OUT opens to de-energize the external defrost relay. 5- RST Terminal This terminal is not functional for the specified application. To Place Control in Test Mode: 1- Turn off all power to avoid damaging board. the circuit 2- Make sure all control terminats are connected as shown on unit wiring diagram before attempting to place control in test mode. IMPORTANT 3- Connect jumper to "TST" pins, 4- Turn indoor thermostat to highest temperature to heat mode and adjust setting. 5- See table 1 for control timings in "TST" mode, 6- Turn on power to unit and re-adjust thermostat. Be sure to remove jumper when test is complete. 6- Timing Pins (T1,T2,T3) Each of these pins provides a different timed interval between defrosts (30, 60 or 90 seconds). A jumper connects the pins to circuit board terminal Wl. To change the interval between defrosts, remove the jumper from the pin it is connected to and reconnect the jumper to one of the other available pins. Page 3 TABLE 1 TEST MODE CONTROL TIMINGS NORMAL OPERATION "TST" PINS JUMPERED TOGETHER !_ 30+3 MIN 1!7+0r7 SEC. i 60±6 MIN : i 90_9 MIN. 14+1A SEC i 21_+21 i SEC* _ i ! 14+1,4 MIN. 3-3_0.3 SEC DEFROST CONTROL TROUBLESHOOTING FLOWCHART START HERE I ............ i .... Check control transformer primary and secondary voltages. Repair or replace as necessary. Is defrost control set for 30, 60 or 90 minute de = frost intervals? I I Check thermostat and thermostat widng. Repair or replace as necessary Check defrost sensor. Is sensor temperature or pressure activated? For help in determining, refer to operation of control in unit installation instructions and unit wiring diagram. I Pressure Is compressor contactor energized? i---No ................ I Yes Turn off power to unit. I 1 .o___1 I Repeat troubleshooting procedure. Check circuit from "HLD" terminal back to thermostat, Repair or replace as necessary. Does un_ go into defrost within appropriate time? I t I | Temperatu re I Yes Yes _ No _ i Is sensor making good contact with coil? Unit is operating Turn off power Remove all test Reassemble No I properly. to unit, jumpers. unit. Yes I Check all electrical connections at the defrost control. Defrost sensor and defrost relay. Connect a jumper between "OUT" terminal and "COM" terminal. CAUTION-Be careful not to short "OUT" terminal to "24v" terminal, I Permanent controt damage could result. I Connect a jumper across the defrost relay. Does unit go immediately I Yes Connect a jumper across the two "TST" pins on the delrost Control, I t No Turn off power to unit. Remove all test jumpers. Replace defrost control with new control board, Repeat troubleshooting procedure. 1 Check voltage across defrost relay coil. Is voltage 24 ± 6VAC? I Turn on power to unit. ["-_ I Yes _ No Is defrost relay energized? Check voltage across "HLD" terminal and "COM" terminal, Is voltage 24 + 6VAC? I Yes 1 Check voltage across re= versing valve coil. Is voltage 24 ÷ 6VAC? I Yes ls solenoid engaging? I No 1 Replace solenoid. Repeat troubleshooting procedure, Turn off power to unit. Check and repair circuit from reversing valve through defrost relay to control transformer. Repeat troubleshooting procedure. Page 4 No Check voltage across "24Y" terminal and "COM" terminal. Is voltage 24 ± 6VAC? I No I Replace reversing valve. Repeat troubleshooting procedure. into defrost? I Turn indoor thermostat to heat mode and adjust to highest temperature setting. i ] Check voltage across "OUT" terminal and "COM" terminal. Is voltage 24 ± 6VAC? Repair or replace sensor bracket. Yes _t Repeat procedure. troubleshooting NO ,,,, ,,,,,, I Turn off power to unit. Check circuit from defrost switch back to control transformer. Repair of replace as necessary, Repeat troubleshooting procedure, I_ ..... Yes I Turn off power to unit. Replace defrost relay, Repeat troubleshooting procedure.
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.2 Linearized : No Page Count : 4 Page Layout : SinglePage Page Mode : UseNone Producer : Goby Monitor Application version 4, 0, 0, 13 Create Date : Mon Jun 30 04:49:37 2008 Author : Title : Subject :EXIF Metadata provided by EXIF.tools