LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0806419
User Manual: LENNOX LENNOX Air conditioner/heat pump(outside unit) Manual LENNOX Air conditioner/heat pump(outside unit) Owner's Manual, LENNOX Air conditioner/heat pump(outside unit) installation guides
Open the PDF directly: View PDF 
.
Page Count: 22
| Download | |
| Open PDF In Browser | View PDF |
'1,_)2007 Lennox Dallas, tndustries Texas, INSTALLATION INSTRUCTIONS ® ]nc, USA Merit® Series13HPD Units 1-1/2 to 5 TONS HEAT PUMP UNITS 505,361M 09/07 Supersedes 504,943M RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE WARNING CAUTION _-_Technical U£[ Publications Litho U.S.A. Shipping and Packing List ...................... 13HPD Outdoor Unit ........................... Unit Dimensions ............................... General Information ........................... Recovering Refrigerant from Existing System ..... Disconnecting and Removing Old Outdoor Unit .... Positioning New Outdoor Unit ................... New or Replacement Refrigerant Line Set ........ Replacing Refrigerant Metering Device ........... Brazing Connections ........................... Testing for Leaks .............................. Evacuating the System ......................... Electrical Connections ......................... Start-Up Procedures ........................... Determining Charge Method .................... System Operation ............................. Defrost System ............................... Maintenance .................................. Homeowner Information ........................ Start-Up and Performance Checklist ............. 1 1 2 2 4 5 5 6 8 9 10 11 12 14 15 17 17 18 20 22 1 - Assembled 13HPD outdoor unit Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. IMPORTANT 09/07 IIIHIIIIII]]IIIHIIIIIII]IIIIIIIII] The Lennox 13HPD Heat Pumps, which will also be referred to in this instruction as the outdoor unit, uses HCFC-22 refrigerant. This unit must be installed with a matching indoor unit and line set as outlined in the Lennox Engineering Handbook. This unit is designed for use in check thermal expansion valve (CTXV) and fixed orifice systems. Page 1 505,361M IIII]III]]IIIIIIIII]IIHI]I]II A A Outdoor Coil Fan tDischarge Air Compressor_ Vapor and Liquid Line Connections Optional Unit Stand-off Kit (4) (Field-installed) SIDE VIEW Model Number A 13HPD-018 13HPD-024 13HPD-030 13HPD-036 13HPD-042 13HPD-048 13HPD-060 24-1/4 24-1/4 24-1/4 24-1/4 28-1/4 28-1/4 32-1/4 SIDE VIEW B (616) (616) (616) (616) (616) (718) (819) 33-1/4 (845) 33-1/4 (845) 29-1/4 (743) 33-1/4 (845) 33-1/4 (845) 37 (940) 37 (940) These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities who have jurisdiction before installation, When servicing or repairing HVAC components, ensure caps and fasteners are appropriately tightened, Table 1 lists torque values for typical service and repair items, Table 1. Torque Requirements A WARNING Part I Recommended Torque Service valve cap 8 ft.- lb. 11 NM Sheet metal screws 16 in.- lb. 2 NM Machine screws #10 28 in.- lb. 3 NM Compressor bolts 90 in.- lb. 10 NM Gauge port seal cap 8 ft.- lb. 11 NM USING MANIFOLD GAUGE SETS When checking the system charge, use a manifold gauge set that features low-loss anti-blow back fittings. See figure 1 for a typical manifold gauge connection setup. OPERATING SERVICE VALVES The liquid and vapor lines service valves are typically used for removing refrigerant, flushing, leak testing, evacuating, checking charge and charging, Each valve is equipped with a service port which has a factory-installed valve stem. Page 2 505361M 09/07 DISTRIBUTOR OUTDOOR REVERSING CHECK EXPANSION VALVE LOW PRESSURE UNIT NOTE - Arrow indicate direction of refrigerant flow. VALVE HIGH PRESSURE INDOOR UNIT GAUGE MANIFOLD VAPOR VALVE CHECK LINE EXPANSION VALVE OR -FIXED ORIFICE DEVICE INDOOR COIL Figure 1. Typical Manifold Gauge Connection Setup IMPORTANT SERVICE SERVICE PORT PORT __ COREI_ CLOSED TO BOTH INDOOR AND CAP I I OUTDO OL:2'2 TOOUTDOOR UNIT_ jSERVICE ----'I_ _ _ I__ _/'/ _,,._ _--_ PORT _" I,_/,_ VALVE STEM SHOWN CLOSED) INSERT HEX WRENOBBER STEM CAP -"_"_'_ 1/12 TURN 1/6 TURN Figure 3. Angle-Type Service Valve (Valve Font-Seated Closed) 1. Remove service port cap with an appropriately sized wrench, 2, Connect gauge to the service port, 3. When testing is completed, replace service port cap and tighten as follows: This illustrates how to use an appropriately sized wrench to tighten caps an additional 1/6 or 1/12 turn clockwise. Figure 2. Cap Tightening Distances IMPORTANT • With Torque Wrench: tighten per table 1, Finger tighten and then • Without Torque Wrench: Finger tighten and use an appropriately sized wrench to turn an additional 1/6 turn clockwise as illustrated in figure 2. To Open and Close Angle-Type Service Valve: A valve stem cap protects the valve contamination and assures a leak-free seal, Operating Angle-Type Service stem from 1, Remove stem cap with an appropriately sized wrench. Valve To Access Angle-Type Service Port: A service port cap protects the service port core from contamination and serves as the primary leak seal. 2. Use a service wrench with a hex-head extension (3/16" for liquid-line valve sizes and 5/16" for vapor-line valve sizes) to back the stem out counterclockwise as far as it will go. Page 3 13HPD SERIES 3. Replace the stem cap and tighten as follows: • • With Torque Wrench: Tighten finger tight and then tighten per table 1, Without Torque Wrench: Finger tighten and use an appropriately sized wrench to turn an additional 1/12 turn clockwise as illustrated in figure 2. SERVICE • With Torque Wrench: tighten per table 1. Finger tighten and then • Without Torque Wrench: Finger tighten and use an appropriately sized wrench to turn an additional 1/12 turn clockwise as illustrated in figure 2. NOTE - A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque. NOTE- To prevent stripping of the cap, the wrench should be appropriately sized and fit snugly over the cap before tightening the cap. POR_._ Open to line set when valve is closed, to both line set and unit when valve is open. Use appropriately wrench. TO INDOOR sized To open rotate stem counterclockwise 90 °. OUTDOORTo _TOouTUNITS__,. INDOOE :DO__ _/ L'/'_ , INSERT HEX WRENCH HERE UNIT BALL To close rotate stem clockwise 90 °' VALVE STEM UNIT Figure 4. Angle-Type Service Valve (Valve Back-Seated Opened) SERVICE SERVICE NOTE - A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque. SERVICE PORT PORT PORT CORE 1 CAP STEM CAP Operating Bali-Type Service Valve TO OUTDOOR UNIT To Access Bali-Type Service Port: Figure 5. Bali-Type Service Valve A service port cap protects the service port core from contamination and serves as the primary leak seal, 1. Remove service port cap with an appropriately sized wrench. 2, Connect gauge to the service port, 3. When testing is completed, replace service port cap and tighten as follows: • With Torque Wrench: Finger tighten and then tighten per table table 1. • Without Torque Wrench: Finger tighten and use an appropriately sized wrench to turn an additional 1/6 turn clockwise as illustrated in figure 2. Remove existing HCFC-22 refrigerant using one of the following methods: METHOD 1 : If the existing outdoor unit is not equipped with shut-off valves, or if the unit is not operational, then: 1. Disconnect all power to the existing outdoor unit. 2. Connect to the existing unit a gauge set, clean recovery cylinder and a recovery machine. Use the instructions provided with the recover machine on how to setup the connections. 3. Remove all HCFC-22 refrigerant from the existing system. Check gauges after shutdown to confirm that the entire system is completely void of refrigerant. 4. Disconnect the liquid and vapor lines from the existing outdoor unit. To Open and Close Bali-Type Service Valve: A valve stem cap protects the valve stem contamination and assures a leak-free seal, from 1, Remove stem cap with a wrench. 2. Use an appropriately sized wrench to open. To open valve, rotate stem counterclockwise 90 °. To close rotate stem clockwise 90 °, 3. Replace the stem cap and tighten as follows: 5. Remove the existing outdoor unit. NOTE - Use recovery machine instructions setup requirements. Page 4 505361M 09/07 for specific RECOVERY MANIFOLD MACHINE \ GAUGES Z (SEE NOTES BELOW FIGURE) CLEAN RECOVERY (SEE NOTES BELOW FIGURE) CYLINDER OUTDOOR UNIT Figure 7. Installation Clearances NOTES: Figure 6. Typical Refrigerant Recovery (Method 1) • Service clearance of 30 in. (762 mm) must be maintained on one of the sides adjacent to the control box. If the existing outdoor unit is equipped with manual shut-off valves then: • Clearance to one of the other three sides must be 36 in. (914 mm) 1. Start the existing HCFC-22 system in the cooling mode and close the liquid line valve. • Clearance to one of the remaining two sides may be 12 in. (305 mm) and the final side may be 6 in. (152 mm) • 48 in. (1219 mm) clearance required on top of unit. • A clearance of 24 in. (610 mm) must be maintained between two units METHOD 2: 2. Pump all of the existing HCFC-22 refrigerant back into the outdoor unit. NOTE - It may be necessary to bypass the low pressure switches to ensure complete refrigerant evacuation. 3. When the low side system pressures reach 0 psig, close the vapor line valve. 4. Disconnect all power to the existing outdoor unit. Check gauges after shutdown to confirm that the valves are not allowing refrigerant to flow back into the low side of the system. 5. Disconnect the liquid and vapor lines from the existing outdoor unit. POSITIONING CONSIDERATIONS Consider the following when positioning the unit: • Some localities are adopting sound ordinances based on the unit's sound level registered from the adjacent property, not from the installation property. Install the unit as far as possible from the property line. • When possible, do not install the unit directly outside a window. Glass has a very high level of sound transmission. For proper placement of unit in relation to a window see the provided illustration in figure 8. Perform the following task at the existing outdoor unit: Disconnect line set at the service valves. f INSTALL UNIT AWAY FROM WINDOWS / --"_ Disconnect electrical service at the disconnect switch. Remove old outdoor unit. CAUTION See Unit Dimensions on page 2 to determine the correct mounting size slab, platform or support. Refer to figure 7 for mandatory installation clearance requirements TWO 90° ELBOWS INSTALLED IN LINE SET" WILL REDUCE LINE SET VIBRATION. Figure 8. Outside Unit Placement Page 5 13HPD SERIES PLACING OUTDOOR UNIT ON SLAB Slab may be level or have a slope tolerance away from the building of not more than two degrees, or two inches per five feet (51 mm per 1524 mm), When installing a unit at grade level, the top of the slab should be high enough above the grade so that water from higher ground would not collect around the unit as illustrated in figure 9. DISCHARGE AIR BUILDING STRUCTURE This section replacement line set is Connections provides information on new installation or of existing line set. If a new or replacement not required, then proceed to Brazing on page 9, If refrigerant lines are routed through a wall, seal and isolate the opening so vibration is not transmitted to the building. Pay close attention to line set isolation during installation of any HVAC system. When properly isolated from building structures (walls, ceilings, floors), the refrigerant lines will not create unnecessary vibration and subsequent sounds. REFRIGERANT LINE SET Field refrigerant piping consists of liquid and vapor lines from the outdoor unit (braze connections) to the indoor unit coil (flare or braze connections). Use Lennox L15 (braze, non-flare) series line set, or use field-fabricated refrigerant lines as listed in table 2. MOUNTING SLAB Table 2. Refrigerant Line Set GROUND LEVEL UNIT ON ROOF Install the unit a minimum of six inches (152 mm) above the roof surface to avoid ice build-up around the unit, Locate the unit above a load bearing wall or area of the roof that can adequately support the unit, Consult local codes for rooftop applications, If unit coil cannot be mounted away from prevailing winter winds, a wind barrier should be constructed as illustrated in figure 10. Size barrier at least the same height and width as outdoor unit, Mount barrier 24 inches (610 mm) from the sides of the unit in the direction of prevailing winds. I I_ inlet air ,O Figure 10. Rooftop Application and Wind Barrier L15 LineSets -018 3/8in. -030"024 (10 mm) 3/4in 3/8 in. 3/4in (19 mm) (m 10) (19 mm) L15-41 15ft.- 50 ft. (4.6m- 15 m) -036 -042 -048 3/8in. 7/8in 3/8 in. 7/8in (10 mm) (22 mm) (10 mm) (22 mm) -060 3/8in. (10 mm) (29 mm) 1-1/8in. 3/8 in. (10 mm) L15-65 15ft.- 50 ft. (4.6m - 15 m) 1-1/8in. Field (29 mm) Fabricated Line set diameters for the unit being installed as listed in table 2 and total length of installation, • Number of elbows and if there is a rise or drop of the piping. The RFCl-metering line consisted of a small bore copper line that ran from condenser to evaporator coil. Refrigerant was metered into the evaporator by utilizing temperature/pressure evaporation effects on refrigerant in the small RFC line. The length and bore of the RFC line corresponded to the size of cooling unit. If the 13HPD is being used with either a new or existing indoor coil which is equipped with a liquid line which served as a metering device (RFCI), the liquid line must be replaced prior to the installation of the 13HPD unit, Typically a liquid line used to meter flow is 1/4" in diameter and copper, Page 6 09/07 Liquid Vapor Line Line MATCHING WITH NEW OR EXISTING INDOOR COIL AND LINE SET inlet air 505361M Vapor Line • I inl_air inlet air Liquid Line Line Set NOTE - When installing refrigerant lines longer than 50 feet, contact Lennox Technical Support Product Applications for assistance or Lennox piping manual. To obtain the correct information from Lennox, be sure to communicate the following points: • Model (13HPD) and size of unit (e.g, -060). Prevailing Winter Winds 0 wind barrier Recommended Model Figure 9. Ground Level Slab Mounting INSTALLING OUTDOOR Field Connections INSTALLING LINESET Line Set Isolation--This reference illustrates procedures,which ensureproperrefrigerantline set isolation: Linesetfor heatpumpapplications cannot be installed underground,For more informationsee the Lennox NO TE - Similar installation practices should be used if line set is to be installed on exterior of outside wail. ANCHORED HEAVY NYLON WIRE TIE Refrigerant Piping Design and Fabrication Guidelines, or contact Lennox Technical Support Product Applications for assistance, STUD • Installation of line set on vertical runs is illustrated in figure 11, • Installation of a transition from vertical is illustrated in figure 12, • Installation of line set illustrated in figure 13, horizontal to WALL i STRAP k on horizontal runs LIQUID LINE TO VAPOR LINE is LIQUID LINE METAL SLEEVE VAPOR LINE - WRAPPED IN ARMAFLEX OUTSIDE WALL VAPOR LINE AUTOMOTIVE MUFFLER-TYPE HANGER LIQUID LINE i % WALL STUD METAL \ \STRAPL,QU,DL TO VAPOR _ LINE LIQUID LINE VAPOR LINE WRAPPED IN ARMAFLEX SLEEVE WIRE TIE STRAP Figure 12. Refrigerant Line Set: Transition Vertical to Horizontal To hang line set from joist or rafter, use either metal strapping material or anchored heavy nylon wire ties, SLEEVE from WIRETIE (AROUND VAPOR LINE _,_,_ 8 FE J ONLY) MATERIAL (AROUND VAPOR LINE ONLY) VAPOR LINE WRAPPED WITH ARMAFLEX LIQUID LINE TAPE OR WIRE TIE CONTACT _INES MUST NO'_ STRUCTURE. 1 METAL PVC PIPE _ ORSLEEVE CAULK WlRETIE FIBERGLASS INSULATION FLOOR JO/STTOR IMPORTANT _ Strap the joist or intervals liquid line __ vapor rafter then to the A line to the at 8 feet strap the vapor line. • - REFRIGERANT LINES MUST NOT CONTACT WALL. Figure 11. Refrigerant Line Set: Installing Vertical Runs (New Construction Shown) Figure 13. Refrigerant Line Set: Installing Horizontal Runs Page 7 13HPD SERIES 13HPD units are used in check thermal expansion valve (CTXV) and fixed orifice systems, See the indoor unit installation instruction and the Lennox Engineering Handbook for approved metering device and application information, Table 2 lists liquid and vapor connection sizes, line sizes and corresponding line set, See table 3 for the fixed orifice size for each unit, In non-standard applications, the provided fixed orifice may not be appropriate, CTXV SYSTEMS 1. On fully cased coils, remove the coil access and plumbing panels. 2. Remove any shipping clamps holding the liquid line and distributor assembly. Remove the existing HCFC-22 fixed orifice device or CTXV from the indoor coil if required. See figure 14 for disassembly and typical removal instructions. The CTXV can be installed internal or external to the indoor coil, In applications where an uncased installed in a field provided plenum, install location that will provide easy access for Refer to Figure 15 for reference during CTXV. (Uncased TUBES NOTE - If necessary, remove existing flow control device (fixed orifice or expansion valve) from existing line set before installing approved metering device. 4. Remove and discard RFC orifice and Teflon washer, 5. Remove and discard cap from the equalizer line port on the vapor line. Check for valve core in port fitting and if installed, remove from port. Coil Shown)["_, TWO PIECE PATCH PLATE(UNCASED COIL ONLY) coil is being the CTXV in a field servicing. installation of 3. Using two wrenches, disconnect liquid line from distributor. Take care not to twist or damage distributor tubes during this process, | ORIFICE HOUSING _;_ 6. Install one of the provided Teflon washers around the stubbed end of the CTXV. |ORIFICE _ _. / OR _ FEXPANSION VALVE I (SEE NOTE) 7. Attach the stubbed end of the kit valve to the distributor assembly. _ 8. Place the remaining Teflon washer around the other end of the CTXV. 9. Attach the liquid line to the CTXV. 10. Attach the sensing bulb of the CTXV in the proper orientation as illustrated in figure 15 to the vapor line using the clamp an screws provided with the CTXV. Vapor Line ACCESS On lines smaller than 718", mount sensing bulb at either the 3 or 9 o'clock position. / I Bulb t \ FITTING (NO VALVE CORE) Sensing bulb (insulation required, if mounted external to the coil casing. On 7/8" and larger lines, mount sensing bulb at either the 4 or 8 o'clock Bu_lb Figure 14. Typical Metering Device Installation oPOSition, Never mount FIXED ORIFICE SYSTEMS n bottom of line. Replace the existing indoor unit fixed orifice with the orifice supplied with the outdoor unit. Place the supplied fixed orifice sticker on the indoor cabinet after installation, Table 3. Fixed Orifice Part Numbers NOTE - Never mount on bottom of line. HCFC-22 Model 018 100484-08 (0.057) 024 100484-11 (0.061) 030 100484-21 (0.072) 036 100484-23 (0.074) 042 100484-30 (0.082) 037 and 048 060 Figure 13HPD 100484-44 (0.098) 09/07 Bulb Installation 11, Connect the equalizer line port from the CTXV to the equalizer port on the vapor line. 12, To prevent any possibility of water damage, properly insulate all parts of the CTXV assembly that may sweat due to its surrounding ambient Page 8 505361M 15. CTXV Sensing NOTE - Insulating the sensing bulb once installed may be required when the bulb location is external to the coil casing, NOTE - The CTXV can be installed internally in coil blowers, or external or internal to indoor coil only applications. OUTDOOR UNIT SERVICE VALVE REMOVE Table 4. CTXV Indoor Kits Model SERVICE PORe/CAP Kit Number 13HPD-018, -024, -030, -036 LB-85759F 13HPD-042, -048 LB-85759G 13HPD-060 100188-01 REMOVE PORT CORE Figure 16. Typical Service Valve Port Core Removal ,WARNING A IMPORTANT WARNING 1. Cut ends of the refrigerant lines square (free from nicks or dents). Debur the ends. The pipe must remain round, do not pinch end of the line. 2. Remove service cap and core from both the vapor and liquid line service ports. 3. Connect gauge low pressure side to liquid line service valve. 4. To protect components during brazing, wrap a wet cloth around the liquid line service valve body and copper tube stub and use another wet cloth underneath the valve body to protect the base paint. 5. Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid line service valve and out of the valve stem port connection on the vapor service valve. The CTXV metering device at the indoor unit coil will allow low pressure nitrogen to flow through the system.) _WARNING Use the following procedure to braze the line set to the new outdoor unit. Figure 17 is provided as a general guide for preparing to braze the line set to the outdoor unit. Before brazing the line set, remove the service port core from both of the outdoor unit's service valves as illustrated in figure 16. NOTE - The TXV metering device at the indoor unit coil will allow low pressure nitrogen to flow through the system.) NO TE - Use silver alloy brazing rods with five or six percent minimum silver alloy for copper-to-copper brazing or 45 percent silver alloy for copper-to-brass or copper-to-steel brazing. Page 9 13HPD SERIES 1 RE MOV pS%' I"c Oo" M RO CUT AND DEBUR INDOOR UNIT COIL SERVICE VALVE VAPOR LINE 13HPD UNIT LIQUID LINE VALVE FLOW NITROGEN 6 71i , WRAPvAS JV,CE BRAZE LINE SET "_ Figure 17. Brazing Connections 6, Braze the line to the liquid line service valve, Turn off nitrogen flow. Repeat procedure starting with paragraph 4 for brazing the vapor line to vapor service valve. NOTE - Normally, the high pressure hose is connected to the liquid line port; however, connecting it to the vapor port better protects the manifold gauge set from high pressure damage. After all connections have been brazed, disconnect manifold gauge set the from service ports and remove wrapping. Reinstall the service port core for both of the outdoor unit's service valves as illustrated in figure 18. Xk WARNING OUTDOOR UNIT LIQUID AND VAPOR SERVICE DO NOT INSTALL CAPS AT THIS TIME VALVES t ,WARNING @ INSTALL SERVICE PORT CORES Figure 18. Typical Service Valve Port Core Installation After the line set has been connected to both the indoor and outdoor units, check the line set connections at both the indoor and outdoor units unit for leaks, Use the following procedure to test for leaks: Xk IMPORTANT 2. With both manifold valves closed, connect the cylinder of HCFC-22 refrigerant to the center port of the manifold gauge set. Open the valve on the HCFC-22 cylinder (vapor only), 3. Open the high pressure side of the manifold to allow HCFC-22 into the line set and indoor unit, , 1. Connect an HCFC-22 manifold gauge set high pressure hose to the vapor valve service port, Page 10 505361M 09/07 Weigh in a trace amount of HCFC-22. [,4 trace amount is a maximum of two ounces (57 g) refrigerant or three pounds (31 kPa) pressure]. 5, Close the valve on the HCFC-22 cylinder and the valve on the high pressure side of the manifold gauge set, 6, Disconnect the HCFC-22 cylinder, 7, Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge set. NOTE - Amounts of refrigerant will vary with line lengths. 8, Adjust dry nitrogen pressure to 150 psig (1034 kPa). 9, Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit, 10, After a few minutes, open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector, 11, Check the indoor and outdoor units and line set for leaks using the leak detector mentioned in paragraph 10, 12. Proceed with evacuation as outlined in the Evacuating the System, NOTE - During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once to determine if there is a rapid rise in sure indicates a relatively large leak, If this occurs, repeat the leak testing procedure, NOTE - The term absolute pressure means the total actual pressure within a given volume or system, above the absolute zero of pressure. Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure. 6. When the absolute pressure reaches 23,000 microns (29.01 inches of mercury), close the manifold gauge valves, turn off the vacuum pump and disconnect the manifold gauge center port hose from vacuum pump. Attach the manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig (1034 kPa) and purge the hose. Open the manifold gauge valves to break the vacuum in the line set and indoor unit. Close the manifold gauge valves. 7. Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge valves to release the dry nitrogen from the line set and indoor unit. WARNING 8. Reconnect the manifold gauge to the vacuum pump, turn the pump on, and continue to evacuate the line set and indoor unit until the absolute pressure does not rise above 500 microns (29.9 inches of mercury) within a 20-minute period after shutting off the vacuum pump and closing the manifold gauge valves. 9. When the absolute pressure requirement above has been met, disconnect the manifold hose from the vacuum pump and connect it to an upright cylinder of HCFC-22 refrigerant. Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit. A IMPORTANT Evacuating the system of non-oondensables is critical for proper operation of the unit. Non-condensables are defined as any gas that will not condense under temperatures and pressures present during operation of an air conditioning system. Non-condensables and water vapor combine with refrigerant to produce substances that corrode copper piping and compressor parts. 1, Connect manifold gauge set to the service valve ports as follows: • low pressure gauge to vapor line service valve • high pressure gauge to liquid line service valve 10. Close manifold gauge valves and shut off the HCFC-22 cylinder and remove the manifold gauge set, SERVICING UNITS DELIVERED VOID OF CHARGE If the system is void of refrigerant, clean the system using the procedure described below, 1, Use nitrogen to pressurize the system and check for leaks, Repair all leaks, 2. Evacuate the system moisture as possible. to remove as much of the 3, Use nitrogen to break the vacuum and install a new filter drier in the system, 2. Connect micron gauge. 3, Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set, 4, Evacuate the system again. Then, weigh the appropriate amount of HCFC-22 refrigerant as listed on unit nameplate into the system. 4. Open both manifold valves and start the vacuum pump. 5, Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury), 5. Monitor the system to determine the amount of moisture remaining in the oil. It may be necessary to replace the filter drier several times to achieve the required dryness level. If system dryness is not verified, the compressor will fail in the future. Page 11 13HPD SERIES for use only with copper 4, Install room thermostat (ordered separately) on an inside wall approximately in the center of the conditioned area and five feet (1.5 m) from the floor. It should not be installed on an outside wall or where it can be affected by sunlight, drafts or vibrations. NOTE - A complete unit wiring diagram is located inside the unit control box cover. 5, Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated in figures 21 and 22. NOTE - 24VAC, Class II circuit connections are made in the low voltage junction box NOTE - Units are approved conductors. 6, Do not bundle any excess 24VAC control wire inside control box. Run control wire through installed wire tie and tighten wire tie to provided low voltage strain relief and to maintain separation of field installed low and high voltage circuits, NOTE - To facilitate conduit, a hole is in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting. Refer to the indoor unit installation instruction for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size. Figures 21 and 22 illustrate typical outdoor unit wiring diagrams for the 13HPD series heat pumps. • • Thermostat Indoor Unit 24V POWER In the U.S,A., wiring must conform with current local codes and the current National Electric Code (NEC). ©® @ __24vPOWER Ji IJ (_) IL J L I ,WARNING COMMON ©1 @1 COMMON 1ST STAGE _A_X IMA _ HEAT In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC). Outdoor Unit *_" A[J xI_TA_EAT @1 @1 ® ,NDOORSLOWER ®1 @ @ REVERSING @1 VALVE COMPRESSOR (SOME CONNECTIONS MAY NOT APPLY. REFER THERMOSTAT AND INDOOR UNIT.) Figure 19. Outdoor Thermostat @1 TO SPECIFIC Unit and Blower Unit Thermostat Designation Indoor Unit Outdoor Unit 24V POWER ® © WIRING CONNECTIONS 1. Install line voltage power supply to unit from a properly sized disconnect switch. Any excess high voltage field wiring should be trimmed or secured away from the low voltage field wiring. 2. Ground unit at unit disconnect switch or to an earth ground. Insulation Less than 100 feet (30 m) 18 Color-coded with a minimum More than 100 feet (30 m) 16 temperature rating of 35°C, 24vPowER OUTDOOR __ _ THERMOSTAT EMERGENCY 1ST STAGE AUXILIARY INDOOR ® @ HEAT BLOWER REVERSING .(_ _ ZS 1STSTAGEHEAT__ (_ AUXILIARY @, @ @ VALVE COMPRESSOR @ @ (SOME CONNECTIONS MAY NOT APPLY. REFER Tq SPECIFIC THERMOSTAT AND INDOOR UN IT.) Figure 20. Outdoor Unit and Blower Unit Thermostat Designation (with Emergency Heat) Page 12 09/07 -- "'//__ type 3. Connect conduit to the unit using provided conduit bushing, 505361M COMMON HEAT RELAY -- HEAT Table 5. Wire Run Lengths AWG # \\\ EMERGENCY NOTE - For proper voltages, select thermostat wire gauge per the foflowing table: Wire run length 2 COMMON COMPRESSOR CONTACTOR WARNING! - ELECTRIC SHOCK HAZARD. Can cause INJURY or DEATH, Unit must be grounded in accordance with national and local codes. NO TE - For use with copper conductors only Refer to unit rating plate for minimum circuit ampacity and maximum over-current protection size. Figure 21. Typical High-Voltage Field Wiring Connection OUTDOOR DEFROST CAPACITOR PURPLE CONTROL THERMOSTAT FAN SLACK FAN T SLACK BLACK /0RANGE ]ljII DUAL RED ] t LLOW COMPRESSOR CRANKCASE HEATER L O R O O O YI -_ LO-PS Y LOUT HI _PS 208-230/60/J DI L2 _ LI GROUND LUG THERMOSTAT DEFROST THERMOSTAT VALVE (_J_REVERSI NG [ _(_(_ BI FAN 1 i K I- I : YELLOW RED )1 I 4_ LO-PS AMBIENT kiiORMO I L_ O2[[GE <:_ SZ_ CMCI TOUT z_ z_ I_'GROUND n_u LOW PRESSURE ) SWITCH ¢PG SLACK S DP L R GROUND KI EQUIPMENT _L__ _OUT YI _COMMON RRI C12 L _ pUrPLE -- n_ _ 541 _87 NOTEFOR USE WITH COPPER CONDUCTORS ONLY.REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVERCURRENT PROTECTION SIZE. _ PRESSURE CONNECTION MUST BE JUMPERED WHEN OPTIONAL SWITCH IS NOT USED H_-PS z_ DESCRIPTION65_F (18<_C) difference temperatures in table 8. If listed in table temperature increase the The following procedure is intended as a general guide and is for use on expansion valve systems only. For best results, indoor temperature should be 70°F (21°C) to 80°F (26°C), Monitor system pressures while charging, between the ambient and liquid should match the approach values listed the values do not agree with the those 8, add refrigerant to lower the approach or recover refrigerant from the system to approach temperature. Table 1. Record outdoor ambient temperature thermometer. using a digital o o o = 2. Attach high pressure gauge set and operate unit for several minutes to allow system pressures to stabilize, Model -018 °F (°C)* 3, Compare stabilized pressures with those listed in table 9. Minor variations in these pressures may be expected due to differences in installations, Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system. Pressures higher than those listed indicate that the system is overcharged. Pressures lower than those listed indicate that the system is undercharged. Verify adjusted charge using the approach method. 7 (3.9) 8. Approach Values Liquid Line Temperature °F (°C) Outdoor Temperature °F (°C) Approach Temperature °F (°C) -024 -030 8 (4.4) -036 13 (7.2) 9 (5) -042 -048 -060 7 (3.9) 9 (5) 7 (3.9) NOTE - For best results, use the same electronic thermometer to check both outdoor-ambient and fiquid-line temperatures. *F. +/-1.0°; C: +/-0.5 ° INSTALLING SERVICE VALVE CAPS Disconnect gauge set and re-install all service valve caps, sO T OO AL 4. Use the same digital thermometer used to check outdoor ambient temperature to check liquid line temperature. Verify the unit charge using the approach method. ,F O,PS Figure 26. Installing Service Valve Port Caps Table 9. Normal Operating Pressure - Liquid +10 and Vapor +5 PSIG* IMPORTANT ll.[e]l I_ i I I[:_.|lmil'_iii['_l_'_v_.l(_] Model Temp. °F (°C)** I I ikli[e]ll _ }Z_]ItTA_I'I_-II[* [:]eKe] dl_i _'lil_-I i] lie]I'_[_]I II:_ [4k'_.'iv*vJ_-_ll_'_e] I I [_lll.[e] III l[e]i[_]il_l" I'liii['_l_"]Lv_."t(_]I_[11 13HPD-018 13HPD-024 13HPD-030 13HPD-036 13HPD-042 13HPD-048 13HPD-060 Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Liquid / Vapor Cooling 65 (18) 75 (24) 141 / 81 163 / 82 148 / 80 176 / 82 146 / 78 171 / 79 154 / 78 180 / 80 139 / 67 163 / 74 146 / 75 171 / 77 145 / 72 171 / 75 85 (29) 191 / 84 206 / 83 201 / 80 216 / 81 191 / 81 198 / 78 199 / 77 95 (35) 105 (41) 222 / 85 256 / 87 240 / 84 277 / 86 233 / 81 271 / 81 246 / 81 284 / 82 220 / 84 256 / 85 229 / 79 268 / 81 230 / 78 266 / 79 115 (45) 2961 89 322 187 313 183 328 185 294 187 308 181 3041 81 Heating 50(10) 192 / 64 185 / 60 198 / 58 196 / 58 204 / 59 197 / 39 212 / 57 40 (4) 180 / 53 176 / 50 188 / 47 185 / 47 195 / 49 189 / 31 200 / 47 30 (-1) 172 / 43 165 / 49 175 / 35 176 / 37 184 / 39 181 / 25 187 / 38 20 (-7) 164 / 34 162 / 31 163 / 26 170 / 30 178 / 32 175 / 18 174 / 34 *These are most-popular-match-up pressures. Indoor match up, indoor air quafity, and indoor load cause pressures to van/ **Temperature of the air entering the outside coil. Page 16 505361M 09/07 Theoutdoorunitandindoorblowercycleondemandfrom theroomthermostat. Whenthethermostat blowerswitch is in the ON position,the indoor bloweroperates continuously. LIQUIDLINEBI-FLOWFILTERDRIER Thepre-installed liquidlinebi-flowfilterdrieras illustrated infigure27isapproved forusewithHCFC-22 only.Donot replaceliquidlinefilterdrierwithcomponent designedfor usewithHFC-410A, EMERGENCY HEAT FUNCTION (ROOM THERMOSTAT) An emergency heat function is designed into some room thermostats, This feature is applicable when isolation of outdoor unit is required or when auxiliary electric heat is staged by outdoor thermostats. When the room thermostat is placed in the emergency heat position, the outdoor unit control circuit is isolated from power and field-provided relays bypass the outdoor thermostats, An amber indicating light simultaneously comes on to remind the homeowner that he is operating in the emergency heat mode. Emergency heat is usually used during an outdoor shutdown, but it should also be used following a power outage if power has been off for over an hour and the outdoor temperature is below 50°F (10°C). System should be left in the emergency heat mode at least six hours to allow the crankcase heater sufficient time to prevent compressor slugging. The 13HPD defrost system includes two components: a defrost thermostat and a defrost control board (DCB). DEFROST THERMOSTAT The defrost thermostat as illustrated in figure 27 is located on the liquid line between the CTXV and the distributor. When defrost thermostat senses 42°F (5.5°C) or cooler, the thermostat contacts close and send a signal to the DCB to start the defrost timing, It also terminates defrost when the liquid line warms up to 70°F (21°C). DEFROST CONTROL BOARD (DCB) The DCB includes the combined functions of a time/temperature defrost control, defrost relay, diagnostic LEDs and terminal strip for field wiring connections as illustrated in figure 28. PI FIELD SELECT TIMING PINS (_ T_ST 9 TEST PINS FA_ (_) C)BsI C)_s2 DIAGNOSTIC LEDS COMPRESSOR DELAY PINS REVERSING VALVE - 0- OI_T 24V TERMINAL STRIP CONNECTIONS _s LOW PRESSURE SWITCH (OPTIONAL) DEFROST THERMOSTAT / -- Y_T Y o HIGH PRESSURE SWITCH (OPTIONAL) DEFROST THERMOSTAT _r c _ o _ . Figure 28. Defrost Control Board (DCB) The control provides automatic switching from normal heating operation to defrost mode and back, During compressor cycle (call for defrost), the control accumulates compressor run times at 30-, 60-, or 90-minute field-adjustable intervals, If the defrost thermostat is closed when the selected compressor run time interval ends, the defrost relay is energized and defrost begins, BbFLOW FILTER DRIER P1 -- CHARGE FACTORY LIQUID SERVICE rs_ n LINE PORT Figure 27. Component VAPOR PORT Temperature Termination and Test Jumper Each timing pin selection provides a different accumulated compressor run time period for one defrost cycle, This time period must occur before a defrost cycle is initiated, PORT FOR USE ONLY! Defrost The DCB selections are: 30, 60, and 90°F (10, 21,32 and 38°C). The jumper termination pin is factory set at 90°F (10°C). If the temperature jumper is not installed, the default termination temperature is 90°F (32°C). The maximum defrost period is 14 minutes and cannot be adjusted. LINE SERVICE Locations Page17 13HPD SERIES Table 10. DS1 and DS2 LED Codes P1 Defrost • 90 DEFAULT _TEST Figure 29. P1 Jumper Configurations A TEST option is provided for troubleshooting, The TEST mode may be started any time the unit is in the heating mode and the defrost thermostat is closed or jumpered. • Control Board Diagnostic LED Mode No power to control Green LED (DS2) OFF Red LED (DS1) OFF Normal operation / power to control Simultaneous Slow FLASH Anti-short cycle lockout Alternating Slow FLASH Low pressure switch fault (Optional) OFF Slow FLASH Low pressure switch lockout (Optional) OFF ON High pressure switch fault (Optional) Slow FLASH OFF High pressure switch lockout (Optional) ON OFF If the jumper is in the TEST position at power-up, the control will ignore the test pins, When the jumper is placed across the TEST pins for two seconds, the control will enter the defrost mode. WARNING If the jumper is removed before an additional 5-second period has elapsed (7 seconds total), the unit will remain in defrost mode until the defrost thermostat opens or 14 minutes have passed. If the jumper is not removed until after the additional 5-second period has elapsed, the defrost will terminate and the test option will not function again until the jumper is removed and re-applied. P5 -- Compressor 30-Second Delay The DCB has a field-selectable function to reduce occasional sounds that may occur while the unit is cycling in and out of the defrost mode. The compressor will be cycled off for 30 seconds going in and out of the defrost mode when the compressor delay jumper is removed. NOTE - The 30-second OFF cycle is not functional when jumpering the TEST pins. Time Delay ByPass The timed-off delay is five minutes long. The delay helps to protect the compressor from short-cycling in case the power to the unit is interrupted or a pressure switch opens. The delay is bypassed by placing the timer select jumper across the P1 TEST pins for 0.5 seconds as illustrated in figure 29. DS1 and DS2 -- Diagnostic LEDs The DCB uses two LEDs (DS1 and DS2) for diagnostics. The LEDs flash a specific sequence according to the condition. Before the start of each heating and cooling season, the following service checks should be performed by a qualified service technician. First, turn off electrical power to the unit prior to performing unit maintenance. • NOTE - It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, etc.) • Visually inspect the refrigerant lines and coils for leaks. • Check wiring for loose connections. • Check voltage at the indoor and outdoor units (with units operating). • Check the amperage draw at the outdoor fan motor, compressor, and indoor blower motor. Values should be compared with those given on unit nameplate. • Check, clean (or replace) indoor unit filters. • Check the refrigerant charge and gauge the system pressures. Page 18 505361M 09/07 Inspect and clean the outdoor and indoor coils. The outdoor coil may be flushed with a water hose. Table 11. Defrost Control Board (DCB) Inputs, Outputs and Configurable Settings DCB Location DCB Label or Description Purpose P1 TEST Test Mode See Test Mode on page 22 for further details. Defrost Temperature Termination (Jumper) Pins The DCB as illustrated in figure 28 has valid selections which are: 30, 60, and 90°F (-1, 16 and 32°C). The shunt termination pin is factory set at 50°F (10°C). If the temperature shunt is not installed, the default termination temperature is 90°F (32°C). W1 24VAC Thermostat Output 24VAC inputtoutput from indoor thermostat to indoor unit. C 24VAC Common 24VAC common L Thermostat Service Light Thermostat service light connection. R 24VAC 24VAC O Thermostat Input Reversing valve solenoid. Y1 Thermostat Input Controls the operation of the unit. P1 P2 P5 30, 60, 90 DELAY Delay Function Input / The DCB has a field-selectable function to reduce occasional sounds that may occur while the unit is cycling in and out of the defrost mode. When a jumper is installed on the DELAY pins, the compressor will be cycled off for 30 seconds going in and out of the defrost mode. Units are shipped with jumper installed on DELAY pins. Mode NOTE - The 30 second off cycle is NOT functional jumpering the TEST pins on P1. P6 TST, PS DF, C, R, O, Y1 DS1 RED LED when Factory Test Connectors Factory Use Only. Diagnostic LED Valid states for DCB's two LEDs are OFF, ON and FLASHING which indicate diagnostics conditions that are described in table 10. Condenser Fan Operation These two connections provide power for the condenser fan. 24VAC output connection for reversing valve. DS2 GREEN FAN TWO O OUT O OUT 24VAC output LO-PS LO-PS Low-Pressure DF DF Defrost Thermostat Defrost thermostat connection points. Y1 OUT Y1 OUT 24VAC Common Output 24VAC common output, switched for enabling compressor contactor. HS-PS HS-PS High-Pressure (Optional) Not Used. L L Line output 24VAC service light output. 24V 24V 24VAC output Not Used. LED CONNECTORS Switch Not Used. Switch Page19 13HPD SERIES • Check the condensate drain line for unobstructed flow; clean, if necessary. • Adjust blower speed for cooling, Measure the pressure drop over the coil to determine the correct blower CFM Refer to the unit information service manual for pressure drop tables and procedure, • free and mild soap and water solution; rinse thoroughly; allow filter to dry completely before returning it to the unit or grille, NOTE - The filter and all access panels must be in place any time the unit is in operation. 4, Electronic Air Cleaner--Some systems are equipped with an electronic air cleaner, designed to remove airborne particles from the air passing through the cleaner. If your system is so equipped, ask your dealer for maintenance instructions, Check drive belt for wear and proper tension, If owner reports insulfident cooling, then: • Measure the temperature drop over the coil. • Gauged and check refrigerant charge, • Refer to section instruction, OPTIONAL on refrigerant charging in 5, Indoor Unit--The indoor unit's evaporator coil is equipped with a drain pan to collect condensate formed as your system removes humidity from the inside air. Have your dealer show you the location of the drain line and how to check for obstructions. (This would also apply to an auxiliary drain, if installed.) this ACCESSORIES Refer to the Engineering Handbook for optional accessories that may apply to this unit, The following may or may not apply: • Loss of Charge Kit • • High Pressure Switch Kit Mild Weather Kit • Compressor Monitor • • Compressor Crankcase Heater Hail Guards • • Mounting Bases Timed Off Control • Stand-off Kit • Sound Cover • Low Ambient Kit • Monitor Kit • Dave Lennox Signature Stat" A IMPORTANT , Room Thermostat When removing debris from around the unit, be aware of metal edges on parts and screws. Although special care has been taken to keep exposed edges to a minimum, physical contact with metal edges and corners while applying excessive force or rapid motion can result in personal injury, In order to ensure peak performance, your system must be properly maintained. Clogged filters and blocked airflow prevent your unit from operating at its most efficient level. Cleaning of the outdoor unit's coil should be performed by a trained service technician. Contact your dealer and set up a schedule (preferably twice a year, but at least once a year) to inspect and service your heat pump system. 1, Air Filter--Ask your Lennox dealer to show you where your indoor unit's filter is located. It will be either at the indoor unit (installed internal or external to the cabinet) or behind a return air grille in the wall or ceiling. Check the filter monthly and clean or replace it as needed, 2, Disposable Filter--Disposable filters should replaced with a filter of the same type and size, be NOTE - If you are unsure about the filter required for your system, call your Lennox dealer for assistance. HEAT PUMP OPERATION Your new Lennox heat pump has several characteristics that you should be aware of: • Heat pumps satisfy heating demand by delivering large amounts of warm air into the living space, This is quite different from gas- or oil-fired furnaces or an electric furnace which deliver lower volumes of considerably hotter air to heat the space. • Do not be alarmed if you notice frost on the outdoor coil in the winter months. Frost develops on the outdoor coil during the heating cycle when temperatures are below 45°F (7°C). An electronic control activates a defrost cycle lasting 5 to 15 minutes at preset intervals to clear the outdoor coil of the frost, A IMPORTANT 3, Reusable Filter--Many indoor units are equipped with reusable foam filters. Clean foam filters with a Page 20 505361M 09/07 Outdoor Unit--Make sure no obstructions restrict airflow to the outdoor unit. Leaves, trash or shrubs crowding the unit cause the outdoor unit to work harder and use more energy, Keep shrubbery trimmed away from the unit and periodically check for debris which collects around the unit, • Duringthedefrostcycle,youmaynoticesteamrising fromtheoutdoorunit.Thisisa normaloccurrence. The thermostatmay engageauxiliaryheat duringthe defrostcycleto satisfya heatingdemand;however, the unit will return to normal operationat the conclusion ofthedefrostcycle. EXTENDED POWER OUTAGE RESTART PROCEDURE If the outdoor temperature is below 50°F (10°C) and power to your outdoor unit has been interrupted for six hours or longer, observe the following when restoring power to your heat pump system, • Set the room thermostat selector to the EMERGENCY HEAT setting to obtain temporary heat for a minimum of six hours. This will allow system refrigerant pressures and temperatures enough time to return to a stabilized condition. • In Emergency Heat mode, all heating demand is satisfied by auxiliary heat; heat pump operation is locked out, After a six-hour warm-up period, the thermostat can then be switched to the HEAT setting and normal heat pump operation may resume. NON-PROGRAMMABLE THERMOSTAT OPERATION Though your thermostat may vary somewhat from the description below, its operation will be similar, Temperature Setting Levers Most heat pump thermostats have two temperature selector levers: one for heating and one for cooling. Set the levers or dials to the desired temperature setpoints for both heating and cooling. Avoid frequent temperature adjustment; turning the unit off and back on before pressures equalize puts stress on the unit compressor. System Set the system switch for heating, cooling or auto operation, The auto mode allows the heat pump to automatically switch from heating mode to cooling mode to maintain predetermined comfort settings, Many heat pump thermostats are also equipped with an emergency heat mode which locks out heat pump operation and provides temporary heat supplied by the auxiliary heat, Indicating Light Most heat pump thermostats have an amber light which indicates when the heat pump is operating in the emergency heat mode, Temperature The temperature temperature, PROGRAMMABLE indicator Indicator displays the actual room THERMOSTATS Your Lennox system may be controlled by a programmable thermostat. These thermostats provide the added feature of programmable time-of-day setpoints for both heating and cooling, Refer to the user's information manual provided with your particular thermostat for operation details, PRESERVICE CHECK If your system fails to operate, check the following before calling for service: • Check to see that all electrical disconnect switches are ON, • Make sure the room thermostat temperature selector and system switch (HEAT, COOL and AUTO) are properly set. • Check for any blown fuses or tripped circuit breakers. • Make sure unit access panels are in place. • Make sure air filter is clean. • If service is needed, locate and write down the unit model number and have it handy before calling, Fan Switch In AUTO or INT (intermittent) mode, the blower operates only when the thermostat calls for heating or cooling. This mode is generally preferred when humidity control is a priority. The ON or CONT mode provides continuous indoor blower operation, regardless of whether the compressor or auxiliary heat are operating. This mode is required when constant air circulation or filtering is desired, Switch Page21 13HPD SERIES Customer Address Indoor Unit Model Serial Outdoor Unit Model Serial Notes: START-UP CHECKS Refrigerant Type:_ Rated Load Amps Actual Amps Condenser Fan Full Load Amps Actual Amps: COOLING Rated Volts MODE Vapor Pressure: _ Liquid Pressure: Supply Air Temperature: Ambient Temperature: HEATING Return Air Temperature: MODE Vapor Pressure: _ Liquid Pressure: Supply Air Temperature: Ambient Temperature: System Refrigerant Charge (Refer to manufacturer's approach temperatures.) Return Air Temperature: information on unit or installation instructions for required subcooling and Subcooling: A Saturated Condensing Temperature (A) minus Liquid Line Temperature (B) Approach: A Indoor Coil Temp. Drop (18 to 22°F) B A APPROACH = B -- Page 22 SUBCOOLING = -- Return Air Temperature (A) minus Supply Air Temperature (B) 09/07 B -- Liquid Line Temperature (A) minus Outdoor Air Temperature (B) 505361M Actual Volts COIL TEMP DROP =
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.2 Linearized : No Page Count : 22 Page Layout : SinglePage Page Mode : UseNone Producer : Goby Monitor Application version 4, 0, 0, 13 Create Date : Mon Jun 30 04:53:58 2008 Author : Title : Subject :EXIF Metadata provided by EXIF.tools