LENNOX Controls And HVAC Accessories Manual L0806301
User Manual: LENNOX LENNOX Controls and HVAC Accessories Manual LENNOX Controls and HVAC Accessories Owner's Manual, LENNOX Controls and HVAC Accessories installation guides
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q _ _ Technical J .J L Publications Lithe U.S.A. _;)2007 HEAT PUMP UNITS KITS AND ACCESSORIES 503,802M 11/2007 Supersedes DEFROST CONTROL KIT 2/98 INSTALLATION INSTRUCTIONS FOR DEFROST CONTROL KIT (23L00 - LB-93614) USED WITH HP14 t 16 t 18 t 20 t CHP16 t 20 t 24 t AND CHP15-261 TO 461 UNITS 3- Remove existing S9 defrost (air-type) pressure switch and install replacement S46 (refrigerant-type) pressure switch as shown in figure 1, Replace switch cover. Package 1 of I contains: 4- Install S6 defrost thermostat shown in figure 1, 1--Defrost control assembly (CMC1 & K4) 2- Wiring diagrams stickers on the liquid line as 5-Single-Phase Units Only -- Start capacitor and mounting bracket must be relocated to a position outside of the control box, Remove the start C3 1--Bag assembly containing: 1- Defrost thermostat switch ($6) 1- Defrost (refrigerant-type) pressure switch ($46) assembly (HP14, HP16 and HP18) capacitor and mounting bracket and discard the wires connected to the capacitor. Position capacitor mounting bracket below control box, Use mounting bracket as a template to drill two .218" diameter mounting holes. Use existing screws to install bracket and capacitor, 1- 1/2" snap-hole plug (HP16 units only) 8- Wire nuts 1- Wire tie 2- Insulating sleeves 6- Position the CMCl defrost control in the control box, 2- #8 - 32 X 1/2" Screws See figure 2, Use the mounting bracket as a template to drill two 3/16" diameter holes. Use two #8 - 32 X 1- Saddle valve (HP14 and HP18) 1/2" screws provided to secure bracket, 7- Wire defrost components as shown in figures 4 and 6, Wires are identified in figure 7, Figure 8 shows terminal designations for older model Essex cube-style relays versus standard relays, This defrost control kit replaces the existing defrost control systems in HP14, HP16, HP18, HP20, CHP16, CHP20, CHP24 and CHP15-261 to 461 units. This kit is used to upgrade units to a temperature initiated / 8- Affix appropriate wiring diagram adjacent to existing unit diagram. pressure terminated defrost system, Various defrost components are used in each unit, Once updated, all units will contain these four defrost components: CMC1 Defrost Control S6 Defrost Thermostat Switch HP14 UNIT DEFROST SYSTEM Install S46 replacement defrost pressure switch with saddle valve/depressor tee (provided) on liquid line. See saddle valve installation procedure in these instructions. S46 Defrost Pressure Switch (refrigerant type) K4 Defrost Relay The replacement defrost control system checks every 90 minutes (factory-set) to determine if defrost is necessary. If the defrost thermostat senses a temperature below AIRFLOW DIRECTION $6 DEFROST ;TAT 35°F (1,6°C), the thermostat contacts close to initiate defrost. When the pressure level sensed by defrost pressure switch rises to 275 psi, switch contacts open and defrost terminates. < 1 - Turn off electrical power to unit at disconnect switch, 2- Remove access panels and remove defrost pressure switch cover. Page 1 EXISTING $8 DEFROST PRESSURE SWITCH FIGURE 1 9- Turn on electrical power to unit, INSTALL CMC1 DEFROST CONTROL ASSEMBLY 10- Run defrost system through several cycles, Check for proper function, 11- Reinstall access panels, O 1- Turn off electrical power to unit at disconnect switch, 2- Remove access panels. 3- HP18 units - Install saddle valve on liquid line, Install defrost refrigerant-type pressure switch/depressor tee to saddle valve (early model units), CHP16, 20, 24, and CHP15-261/461 DEFROST RELAY K4 units - Install (refrigerant-type) pressure switch on existing liquid line pressure tap fitting. 4- Position the CMC1 defrost control in control box and BRACKET SIDE OF CONTROL BOX use the mounting bracket as a template to drill two 3/16" diameter holes. Use two #8-32 X 1/2" screws FIGURE 2 provided to secure bracket, 5-Wire 9- Turn on electrical power to unit, defrost components as shown in figure 5 through 8. Wires are identified in figure 9. Figure 10 shows terminal designations for older model Essex cube-style relays versus standard relays. 10- Run defrost system through several cycles, Check for proper function, 11- Reinstall access panels, 6- Affix appropriate wiring diagram adjacent to existing unit diagram, 7- Turn on electrical power to unit, 1 - Turn off electrical power to unit at disconnect switch, 8- Run defrost system through several cycles, Check for proper function, 2 - Remove access panels and remove defrost pressure switch cover, 9- Reinstall access panels, 3 - Remove existing defrost pressure switch and sensor. Install snaphole plug (provided) into panel hole, If electronic defrost pressure switch has been previously used, remove and discard the two 1 - Braze saddle valve (provided) onto 3/8" O.D. process tube between unit distributor and drier for leakproof joint, Cool with wet rag and clean joint. Apply process hose to pressurize and check for leaks as shown in figure 3, IMPORTANT - Do not install saddle valve near an pressure switch wires. Install replacement $46 (refrigerant-type) pressure switch with valve depressor tee on service port of liquid line service valve, 4- Install $6 defrost thermostat on the between the drier and the distributor. existing fitting or solder joint. liquid line 2 - After cooling, place teflon seal on pin as shown and insert steel pin (core side down) into valve body. 5 - Route brown defrost thermostat wires through hole in bottom or back of control box, 3 - Screw cap down on valve body, forcing steel pin to pierce line. Use two wrenches to avoid breaking brazed joint, Continue to tighten cap until valve body is smoothly crimped over steel pin, 6- Position the CMC1 defrost control in control box and use the mounting bracket as a template to drill two 3/16" diameter holes, Use two #8-32 X 1/2" screws provided to secure bracket, 7- Wire defrost components Wires are identified in terminal designations cube-style relays versus as shown in figure 5 and 6, figure 7, Figure 8 shows for older model Essex standard relays, 8- Affix appropriate wiring diagram adjacent to existing unit diagram, A - Defrost Timer The defrost control will not allow a defrost to last more than 14 minutes, The defrost timer can be field adjusted from a 90-minute to a 30- or 60-minute defrost interval if warranted by climatic conditions, Page 2 ._, CHECK FOR LEAKS AT BRAZE INSERT STEEL PIN INTO BODY. SCREW CAP ON CHECK VALVE CORE TO MAKE SURE iT IS TIGHT BRAZE SADDLE VALVE BODY ONTO TUBE BODY TO I_1 _ COOL WITH WET CLOTH STEEL TEFLON P,EROE TUBE SEAL PIN USE TWO WRENCHES TO AVOID TWiSTiNG FIGURE 3 B - Defrost Thermostat The thermostat closes at 35°F + 4°F initiating the defrost cycle. It is mounted on the liquid line between the drier and the distributor. C - Defrost Pressure Switch The defrost cycle is terminated by the defrost pressure switch when the switch senses a rise in pressure to a level of 275 psi. If the coil pressure does not rise to this value within the time override period of the defrost timer (approximately 14 minutes), the defrost cycle is terminated by the defrost timer. The pressure switch is located as follows for the various units covered by this instruction: HP14/HP18 depressor tee. liquid line with saddle valve/valve HPf6 - service port of liquid line service valve with valve depressor tee. CHPf6, 20, 24 and CHP15-261/461 - existing liquid line pressure tap fitting. NOTE - Termination of the defrost cycle, by rising refrigerant pressure or by defrost timer override, begins another 90-minute (30- or @-minute) period before the system checks for defrost again. IMPORTANT - Inspect both sides of the outdoor coil periodically and remove any grass, leaves, or other obstructions. DEFROST KIT WIRING FOR HP14 UNITS DESCRIPIION LO SPEED KEY COMPONENT * CMCI IlMER=DEFROSI *K4,-I,2,5 RELAY-DEPROSI] KS,-_ K6 RELAY@EFROSI RELAY-LATCH(IN "86 "$46 2(LO SPD) UNIT) SWITCH-DEFROST SWI[CH-DEFROS1,TERMINAfION T] 1RANS[:ORMER CONqROL * DENOTES NEW COMPONENTS,OTHERS SHOWN ARE EXTSTTNG, COMPRESSOR PRO1 EC1 i ON MOD[ LE = = HEAT PUMP OUTDOOR UNITS DEFROST FOR HPI4 K6 (IN UNIT)t CONTROL KIT SERIES UNITS 208 Supersedes or_ No. 230/60/I New orm N_. .552,7 I IW (_ K5 LOW SPEED FIGURE 4 Page 3 1998 Lenno× [_dus!r e_ 1_¢ h i _ h 0 _U , S A . DEFROST KIT WIRING FOR HP16, HP18, HP20 AND CliP15 UNITS TBICHP}5 ONLY 4} ) s4 K4-3 D{ I PRESSURE SWITCII B4 DEFROST RELAY (K4 KI ON CHPL5) COMPRESSOR CONTACTOR K4 2 \ REMOVE EXSIST!NG WIRES FROM TERMINALS 1,2,& 3 OF EXISTING DEFROST RELAY. LEAVE REST OF WIRES ON POLES 2 & 5 AS IS. L.eNNDX_,o_,_. DEFROST CONTROL KIT FOR HP 6,HPI8,HP20 & CHPI5 SERIES UNITS No. New Form No. 552,7lOW (_199B Lennox Indusl_ies Inc. * DENO]ES NEW COMPONENIS,O1HERS SHOWN ARE EXISTING, DESCRIPTION COMPONENT BI COMPRESSOR B4 MOTOR-FAN .......... t_M_! ................................................................. ................................................................... HR} HEATER COMPRESOR CONIACTOR-COMPRESSOR ..................... _.L -I RELAY DEFROST *K4,-I,2,3 K31 54 ' $6 . SS6 208-250/60/I Form 124v tOM w KEY WlRN@OIAGRAMJl 9s.................... HEArPuMP ou soo uNi -s Supersedes & L fho U.S.A. FIGURE 5 Page 4 RE1AY HARD START KIT iSWITCH-PRESSURE,HIGH SWITCH DEFROST iSWlTCH-DEFROST,TERMINATION DEFROST KIT FIELD WIRING $46 TERMINAL DEFROST PRESSURE (E) ..jREO(16") ["_ SWITCH KI COIL OR (YI) (M) STRIP $6 TERMINAL DEFROST (}) T-STAT S[RIR BROWN_" EG/ EXISTING PIGTAIL /\ ORANGE(5") BLUE \ (}2") / ORANGE(4") EXISTING CMC} =IGTAIL 0 © / _$46 o8 \ \ '-rl TERMINAL (2) DEFROST PRESSURE SWI]CH (6") o_ "o on THI oS m ORANGE(6") \ EXISTING 4_ DEFROST \ T-STAT $6 24 VOLTS B4 I FAN COIL HOT _#_ (A) EXISTING DE ROST © k..___ RELAY K I (I) .YELLOW (iS"} -_24V COMMON KI COIL TERMINAL @_J STING °IGTAIL (2) DEFROST KIT WIRING FOR CHP16, CHP20, CHP24 UNITS 24V HOT PRESSURE SWITCH 0 KEY _CMCI KI,-I • K4,-I,2,3 K26,-I,2 $4 _$6 $46 OUT _) L DESCRIPTION COMPONENT TIMER-DEFROST CDNTACTOR-CONPRESSOR RELAY-DEFROST RELAY-EMERGENCY HEAT SWITCH-PRESSURE,HIGH SWITCH-DEFROST SWITCH-DEFROST,TERMINATION K1 COMPRESSOR ( _ CDNTACTOR K4-1 24V CON DENOTES NEW COMPONENTS,OTHERS SHOWN ARE EXISTING. WIRING DIAGRAH ii/07 HEAT PUHP-DUTDDDR DEFROST CONTROL CHPI6,CHP20 AND SERIES UNITS KIT CHP24 Form Form FOR Supersedes UNITS C) 2007 No, New 537021-01 No. Litho FIGURE 7 Page 6 U,S,A. DEFROST KIT WIRING FOR CHP24D UNITS 24V POWER DISCONNECT ALL POWER BEFORE SERVICINO IF ANY WIRE IN THIS APPLIANCE IS REPLACED, IT MUST BE REPLACED WITH VIRE OF LIKE SIZE, RATING AND INSULATION THICKNESS K3-1 (_ ECONOMIZER BLOWER(O) J35 • < -t _._6 HEAT 2(W2) HEAT l(Wl) -6 P66 K6 < WARNING-ELECTRIC SHOCK HAZARD_AN CAUSE INJURY OR DEATH, UNIT _MCI MUST DE GROUNDED IN ACCORDANCE WITH NATIONAL ANO LOCAL CODES -8 I //\CONNECTIONS FOR FACTORY INSTALLED SMOKE DETECTOR AI7.MAX LOAD O.IVA 24VAC CLASS II I DESIGNATION I VOLTAGE LETTER ! I Y 1208-230/60/3 -3 57516013 24V COMMON TD2 DENOTES OPTIONAL COMPONENTS /_ MEO SPEED(BLACK TO J43-3 & BLUE TO J43-2) LOW SPEED(BLACK TO J43-4 & BLUE TO J43-0) NOTE-FOR USE WITH COPPER CONDUCTORS ONLY, REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE FACTORY INSTALLED OPTION $3 NOT USED V/HEN LOW AMBIENT KIT IS FACTORY INSTALLED _EOUIPMEN_ GROUND 575V 27 NOTE_USE COPPER CONBL_TORSONLY 460VK3-2: DOB-230V, 460v HOOKUP A /6_ INSTALL JUMPER WHEN LOW AMBIENT KIT FIELD INSTALLED DESCRIPTION (EY COMPONENT '35 PLUO-TES T 43 PLUG-BLOWER MOTOR 47 PLUG-OUTDOOR PAN ._ PLU_-UNIT TO _MOK_ I)ET_CTOR 178 PLUG-SMOKE DETECTOR SWITCH-LIMIT.LOW COMP 1 /COMPRESSOR MONITOR ;4 SWITCH-LIMIT HI PRESS COMP I ;6 SWITCH-DEFROST COMP I ;11 SWITCH-LOW PRESS.LOW AMD KIT ;04 SWITCH-LOSS OF CHARGE,CORP I ;4G SWITCH-DEFROST TERMINATION ;48 SWITCH-DISCONNECT P43 GROUND ;75 SWITCH-FIR_STAT O I TRANSFORMER-CONTROL 4 TRANSFORNER-BLOVOR MOTOR 'D_ TERMINAL STR_P-UNIT "D13TERMINAL STRIP-POVOR DISTRID DIRECT DRIVE N 2. LINE VOLTAGE J43 5 • _X6 z • 4 z i _: HEAT WIRINGDIAGRAMII/O7 PUMP-PACKAGED HEAT PUMP SECTIrIN B4 CHP24D-G53-I-Y,G,JI FoPr_ NO, I New FOP_ NO, 537020-01 SL_per_edes C4 FIELD INSTALLED 3/_ 208/230V _) _007 FIGURE 8 Page 7 I Lltho U.&A, WIRE IDENTIFICATION © © @ K4-6 K4-9 D D K4-3 D CMC1 "24v" D Red 6" a Defrost Relay Coil "A" Red 12" a Red 6" a K1 Contactor"Tl" B4 Outdoor Fan Motor Blue 12" <:::3 24V Hot, $46-1, K5-4 (HP14) Existing Wire Existing Wire Existing Wire © @ © @ @ K4-7 D K44 D Brown 6" a s46-2, s6-1 Brown 4" <::3 K4-A Existing Wire K4-4 I::C) Orange 6" K4-B E:::) Orange 4" K4-8 D K4-2 D CMC1 "COM" D CMC1 "HLD" D © @ C:] S6-2, K6-A (HP14) a CMC1 "OUT" a CMCl Orange 5" Yellow 4" CMCl "RST" "COM" Yellow 13" 4::3 K1-B, COM, K5 (HP14) Red 16" <::3 K1-A, K5 (HP14) Existing Wire - HP14 Existing Wire - HP14 FIGURE 9 RELAY TERMINAL IDENTIFICATION EXISTING DEFROST RELAY REPLACEMENT DEFROST RELAY 8 1 C:::223 2 -[333333 -_ 3 ---4 _t _t C C ................ i .................... A i B ................. / J FIGURE 10 Page 8
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