LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0805474
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
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INSTALLATION INSTRUCTIONS ,?u2006 Lennox Industries Inc+ Dallas, Texas, USA HS29 Series Units CONDENSING UNITS 504,963M 03/06 Supersedes 09/04 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE X_ WARNING _l_ IMPORTANT _ Technical LL.L[ Publications Litho U.S.A. Elite® Series Outdoor Unit ...................... General Information ........................... Shipping & Packing List ........................ Unit Dimensions - inches (mm) .................. Setting the Unit ............................... Electrical ..................................... Refrigerant Piping ............................. Fixed Refrigerant Metering Device ............... Manifold Gauge Set ........................... Service Valves ................................ Leak Testing .................................. Evacuation ................................... Start-Up ...................................... Charging ..................................... System Operation ............................. Maintenance .................................. Optional Accessories .......................... Start-Up & Performance Check List .............. 1 1 1 2 2 3 4 6 7 7 8 8 9 9 13 12 13 13 HS29 Elite® Series outdoor units are designed for expansion valve (TXV) and fixed orifice systems, Refer to Lennox engineering handbook for expansion valve kits which must be ordered separately. 1 -Assembled HS29 outdoor unit 1 - Fixed orifice refrigerant metering device 1 -Coupling, 5/16 x 3/8" (012,018, 024, 030) 1 - Sight Glass (international units only) X_ WARNING Check equipment for shipping damage. If you find any damage, immediately contact the last carrier. _1_CAUTION These instructions are intended as a general guide and do not supersede national or local codes in any way+ Consult authorities having jurisdiction before installation+ 03/06 IIIB+IIIIIIIIIIIHIBIIIIIlll Page 1 504,963M IIIIIIIIIIIIIIIIIIIIIIIIIIIIB When servicing or repairing HVAC components, ensure the fasteners are appropriately tightened, Table 1 shows torque values for fasteners. Table 1 Torque CAUTION Requirements Part Recommended Service valve cap Sheet metal screws 8 ft.- lb. 16 in.- lb. 11 NM 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 ,_nlet Torque Refer to unit dimensions for sizing mounting slab, platforms or supports. Refer to figure 1 for installation clearances. air 4-3/8 4-3/8 (111) (111) optional unit © (_ inlet air inlet air _inlet (field-installed) stand-off kit (4) coil drain (around perimeter of base) Vapor line 6-3/8 connection (162) air C !) Liquid line connection Top View l-d 4-3/8 Top View Base Section Discharge air i,._l c outdoor coil fan t %. compressor A vapor & liquid line connection electrical inlets Optional unit stand-off kit (4) (field-installed) 2-3/4 (70) Side View 3/4(191 Model No. HS29-012,-018,-024 HS29-030 HS29-036,-042,-048,-060, HS29-065 -062 Side View A B C 25 (635) 24-1/4 (616) 24-1/4 (616) 29 (737) 33 (838) 28-1/4 (718) 32-1/4 (819) 24-1/4 (616) 24-1/4 (616) 37-1/4 (946) 36-1/2 (927) 28-1/4 (718) Page 2 504963M 03/06 Installation Refer to the furnace or blower coil installation instructions for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size. Clearances 1. Install line voltage power supply to unit from a properly sized disconnect switch. 36 (914 mm) 2. Ground unit at unit disconnect switch or to an earth ground. 36* (914 ram) NOTES • To facilitate conduit, a hole is in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting. • Units are approved for use onlywith copperconductors. • 24V, Class II circuit connections are made in the low voltage junction box. Refer to figure 2 for field wiring diagram. • A complete unit wiring diagram is located inside the unit control box cover. 36* (914 ram) *A service clearance of 30" (762 mm) must be maintained on one of the sides adjacent to the control box. Clearance to one of the other three sides must be 36" (914 mm). Clearance to one of the remaining two sides may be 12" (304 mm) and the final side may be 6" (152 mm). Typical A clearance of 24" (610 mm) must be maintained between two units. 48" (1219 mm) clearance required on top of un#. Maximum soffit overhang is 36" (914 mm). Figure _0_!_ Field Wiring TDOOR Diagram CAPACITOR START * FAN 1 CI2 DUAL CAPACITOR URPLE Slab Mounting When installing unit at grade level, install on a level slab high enough above grade to allow adequate drainage of water. Locate the top of the slab so run-off water from higher ground will not collect around the unit, Roof Mounting Install unit at a minimum of 4 inches above the surface of the roof. Ensure that the weight of unit is properly distributed over roof joists and rafters. Either redwood or steel supports are recommended. In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC). _WARNING RED YELLOW KSI POTENTIAL RELAY * KI COMPRESSOR CONTACTOR COMPRESSOR GROUND LUG G_UND (SEE NOTE) 208=250/60/I NOTE - For use with copper conductors only. Refer to unit rating plate for minimum circuit ampacity and maximum over-current protection size. WARNING! - ELECTRIC SHOCK HAZARD. Can cause INJURY or DEATH. Unit must be grounded in accordance with national and local codes. Figure 2 NOTE - For proper voltages, select thermostat wire gauge per the following chart: . Wire run length AWG # Insulation type less than 100' (30m) more than 100' (30m) 18 16 color-coded,o temperature rating 35 C minimum Install room thermostat (ordered separately) on an inside wall approximately in the center d the conditioned area and 5 feet (1.5 m) from the floor. It should not be installed on an outside wall or where it can be effected by sunlight, drafts or vibrations. Page 3 HS29 SERIES 4, Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit, See figure 3, Typical Low Voltage Thermostat Field Wiring Indoor Unit NOTE - Units are designed for line sets of up to fifty feet (15 m). For appfications longer than fifty feet, consult the Lennox Refrigerant Piping Guide (Corp. 9351-L9). Select line set diameters from table 2 to ensure that oil returns to the compressor. Installing @ power ® heat Q cooling Q indoor blower Q Line During the installation of any heat pump or a/c system, it is important to properly isolate the refrigerant lines to prevent unnecessary vibration. Line set contact with the structure (wall, ceiling or floor) causes some objectionable noise when vibration is translated into sound, As a result, more energy or vibration can be expected, Closer attention to line set isolation must be observed. Outdoor Unit Y1 Outdoor Unit Following are some points to consider when placing and installing a high-efficiency outdoor unit: /_C common 1, Placement - Be aware some localities are adopting sound ordinances based on how noisy the unit is from the adjacent property not at the original installation. 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. Figure 4 shows how to place the outdoor unit and line set, Unit Outdoor NOTE - see unit wiring diagram for power supply connections. NOTE - If the indoor unit is not equipped with blower relay. It must be field-provided and installed (P-8-3251 or equivalent). Figure 3 Field refrigerant piping consists of liquid and vapor lines from the outdoor unit (sweat connections) to the indoor coil (flare or sweat connections). Use Lennox L15 (sweat, nonflare) series line sets as shown in table 2 or use field-fabricated refrigerant lines, Refer to Refrigerant Piping Guide (Corp, 9351-L9) for proper size, type, and application of field-fabricated lines. Valve sizes are also listed in table 2, Table Refrigerant Model No. Refrigerant Outside Unit Placement and Installation Install unit away from windows "_ 2 Line Sets Valve Field SizeConnections Recommended Line Set Liquid Line Vapor Line Liquid Line Vapor Line L15 Line Sets -012 3/8 in 5/8 in 5/16 in 5/8 in L15-21 -018 (10 mm) (16 mm) (8ram) (16 mm) 15 ft, - 50 ft, (4.6 m - 15 m) -024 3/8 in. 3/4 in. 5/16 in, 3/4 in. L15-31 -030 (10 mm) (19 mm) (8mm) (19 mm) 15 ft, - 50 ft, Two 90 ° installed in line set will reduce line set vibration. (4.6 m - 15 m) -036 3/8 in, 3/4 in, 3/8 in, 3/4 in, L15-41 (10mm) (19mm) (lOmm) (19mm) 15ft,-50ft, -042 3/8 in. 7/8 in. 3/8 in. 7/8 in. L15-65 -048 (10 mm) (22 mm) (10mm) (22mm) 15ft,-50ft. Figure 4 (4.6 m - 15 m) 2, Line Set Isolation - The following illustrations demonstrate procedures which ensure proper refrigerant line set isolation. Figure 5 shows how to install line sets on vertical runs. Figure 6 shows how to make a transition from horizontal to vertical, Figure 7 shows how to install line sets on horizontal runs, (4.6 m - 15 m) -060 3/8 in, 1-1/8 in, 3/8 in, 1-1/8 in, Field -062 -065 (10 mm) (29 mm) (10 mm) (29 mm) Fabricated Page 4 504963M 03/06 Refrigerant Line Sets: Installing Vertical Runs (new construction shown) NOTE - Similar installation practices should be used if line set is to be installed on exterior of outside wall. OUTSIDE WALL IMPORTANT - Refrigerant lines must not contact wall. VAPOR LINE LI -_. UID LINE WIRE TIE INSIDE WALL - STRAP SLEEVE VAPOR LINE WRAPPED WITH ARMAFLEX [_'_ IMPORTANT! Refrigerant ines must not contact structure. _- o "_- LIQUID WIRE TIE LINE \ "_ ----------WOOD BLOCK IX, _. _ WIRE TIE STRAP [_ PVC PIPE CAULK FIBERGLASS INSULATION SLEEVE Figure Refrigerant ANCHORED Line Sets: 5 Transition HEAVY NYLON WIRE TIE From Vertical AUTOMOTIVE WALL STUD To Horizontal MUFFLER-TYPE HANGER WALL STUD Strap Liquid Line To Vapor Line Strap Liquid Line To Vapor Line LIQUID LINE METAL SLEEVE VAPOR LINE -WRAPPED ARMAFLEX LIQUID LINE IN Figure METAL SLEEVE VAPOR LINE - WRAPPED IN ARMAFLEX 6 Page 5 HS29 SERIES Refrigerant Line Sets: Installing Horizontal Runs WIRE TIE (Around vapor line only) To hang line set from joist or rafter, use either metal strapping material or anchored heavy nylon wire ties. 8 feet STRAPPING MATERIAL (Around vapor line only) \ FLOOR JOIST OR ROOF RAFTER F\ TAPE OR WIRE TIE / / J 8 feet Strap the vapor line to the joist or rafter at 8 ft. intervals then strap the liquid line to the vapor line. M ETAL SLEEVE FLOOR JOIST OR ROOF RAFTER Figure Brazing Connection Procedure 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, Before making line set connections, use dry nitrogen to purge the refrigerant piping. This helps prevent oxidation and introducing moisture into the system. 3, Use silver alloy brazing rods (5 or 6 percent minimum silver alloy for copper-to-copper brazing or 45 percent silver alloy for copper-to-brass or copper-to-steel brazing) which are rated for use with HCFC22 refrigerant. Wrap a wet cloth around the valve body and the copper tube stub, Braze the line set to the service valve, 7 sion valve system. See indoor coil installation instructions and the Lennox Engineering Handbook for approved TXV and fixed orifice match-ups and application information, Table 2 lists the unit liquid and vapor line sizes and corresponding line sets, Fixed Orifice 6. Install a field-provided thermal expansion valve (approved for use with HCFC22 refrigerant) in the liquid line at the indoor coil, Table 3 Fixed Orifice Drill Sizes* Unit Fixed Orifice Part # Drill Size HS29-012 83M54 0.045 HS29-018 HS29-024 HS29-030 HS29-036 HS29-042 42J40 42J43 42J45 42J48 25M56 0.057 0.063 0.067 0.073 0.079 HS29-048 HS29-060 42J55 42J61 0.086 0.098 *HS29-062 and HS29-065 are not approved for use with RFC kits. HS29 units are applicable to either fixed orifice or expan- Page 6 03/06 Systems HS29 units are shipped with a fixed refrigerant metering device. 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, See table 3 for the fixed orifice size for each unit, 4. Wrap a wet cloth around the valve body and copper tube stub to protect it from heat damage during brazing, Wrap another wet cloth underneath the valve body to protect the base paint. 5. NOTE - The tube end must stay bottomed in the fitting during final assembly to ensure proper seating, sealing and rigidity. 504963M ? Innonstandard applications, theprovided fixedorificemay notbeappropriately sized.RefertotheEngineering Handbookforspecificorificeinformation. Installthefixedorifice orificeas shownin figure8. Donottwistcaptubeswhen loosening sealnutfromorificebody. Metering Device 2. Use a service wrench with a hex-head extension (3/16" for liquid-line valve sizes; 5/16" for vapor-line valve sizes)to back the stem out counterclockwise as far as it will go. 3. When testing is completed, replace service port cap. Tighten finger tight; then torque per table 1 (Page 2). 4. Replace the stem cap. Tighten finger tight; then torque per table 1 (Page 2). Installation o O-RING ORIFICE To Close or EXPANSION VALVE & // DISTRIBUTOR STRAINER NO TE - If installing cludes expansion valve with an indoor coil that in- a fixed orifice, remove orifice before installing valve. Figure Expansion Valve Front-Seated Service Valves: 1. Remove the stem cap with an adjustable wrench. 2. Use a service wrench with a hex-head extension (3/16" for liquid-line valve sizes; 5/16" for vapor-line valve sizes) to turn the stem clockwise to seat the valve. Tighten it firmly. 3. Replace the stem cap. Tighten finger tight; then torque per table 1 (Page 2). 8 Front-Seated Liquid Line Service Valve Systems Expansion valves equipped with Chatleff type fittings are available from Lennox. Refer to the Engineering Handbook for expansion valves for use with specific match-ups. SERVICE _\ CAP STEM PORT To outdoor coil If you install a expansion valve with an indoor coil that includes a fixed orifice, remove the orifice before the expansion valve is installed. SERVICE PORT CAI IMPORTANT indoor coil SCHRADER VALVE [oper to line set when valve is closed (front seated)] (Valve front-seated) (Valve Shown Open) insert hex wrench here SERVICE PORT When checking the unit charge, use a manifold gauge set that is equipped with "low loss" hoses. Do not use a manifold gauge set with anything other than a "low loss" hose. To \ outdoor coil SERVICE PORT CAI The liquid line and vapor line service valves (figures 9 and 10) and gauge ports are used for leak testing, evacuating, charging and checking charge, See table 1 (on page 2) for torque requirements Each valve is equipped with a service port which has a factory-installed Schrader valve. A service port cap protects the Schrader valve from contamination and serves as the primary leak seal, To Access Schrader Port: 1, Remove access panel, 2, Remove service port cap with an adjustable wrench. 3. Connect gauge to the service port. To Open Front-Seated Service Valves: 1. Remove stem cap with an adjustable wrench. CAP STEM SCHRADER To indoor coil VALVE Figure 9 Bali-Type Service Valve (Vapor Line) Vapor line service valves function the same way as the other valves, the difference is in the construction. These valves are not rebuildable. If a valve has failed, you must replace it. A ball valve valve is illustrated in figure 10. The ball valve is equipped with a service port with a factoryinstalled Schrader valve. A service port cap protects the Schrader valve from contamination and assures a leakfree seal. Page 7 HS29 SERIES Bali-Type Vapor Line Valve (Valve USE ADJUSTABLE WRENCH TO OPEN: ROTATE STEM COUNTER-CLOCKWISE TO CLOSE: ROTATE STEM CLOCKWISE 90 °. SERVICE SCHRADER PORT CAP _ WARNING Open) 90 °. Unit VALVE _ Side SERVICE PORT Field Side STEM Using an Electronic Leak Detector or Halide 1. Connect a cylinder of HCFC-22 to the center port of the manifold gauge set. 2. With both manifold valves closed, open the valve on the HCFC-22 cylinder (vapor only). 3. Open the high pressure side of the manifold to allow the HCFC-22 into the line set and indoor unit. Weigh in a trace amount of HCFC-22. [A trace amount is a maximum of 2 ounces (57 g) or 3 pounds (31 kPa) pressure,] Close the valve on the HCFC-22 cylinder and the valve on the high pressure side of the manifold gauge set, Disconnect the HCFC-22 cylinder. 4. Connect a cylinder of nitrogen with a pressure regulating valve to the center port of the manifold gauge set, STEM CAP BALL (Shown open) Figure 10 After the line set has been connected to the indoor and outdoor units, check the line set connections and indoor unit for leaks. ,WARNING WARNING WARNING 5. Connect the manifold gauge set high pressure hose to the vapor valve service port. I 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, 6. Adjust the nitrogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge set which will pressurize line set and indoor unit. 7. After a few minutes, open a refrigerant port to ensure the refrigerant you added is adequate to be detected. (Amounts of refrigerant will vary with line lengths.) Check all joints for leaks. Purge nitrogen and HCFC-22 mixture. Correct any leaks and recheck. I I Evacuating the system of noncondensables is critical for proper operation of the unit. Noncondensables are defined as any gas that will not condense under temperatures and pressures present during operation of an air conditioning system, Noncondensables and water vapor combine with refrigerant to produce substances that corrode copper piping and compressor parts and can lead to improper charge levels. A IMPORTANT Page 8 504963M 03/06 1. Closemanifoldgaugesetvalves.Connectmanifold gaugesetto theservicevalveportsasfollows: • lowpressure gaugeto vapor line service valve 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. • high pressure gauge to liquid line service valve 2. Connect micron gauge, . 3. Connect the vacuum pump (with vacuum gauge) to the center port of the manifold gauge set, 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). 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 absolute pressure, A rapid rise in pressure indicates a relatively large leak, If this occurs, repeat the leak testing procedure, 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 valves to break the vacuum from 1 to 2 psig positive pressure in the line set and indoor unit. Close manifold gauge valves and shut off the HCFC-22 cylinder and remove the manifold gauge set, IMPORTANT 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 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. 1. Rotate the fan to check for frozen bearings or binding. 2. Inspect all factory- and field-installed wiring for loose connections. 3. After evacuation is complete, open the liquid line and vapor line service valves to release the refrigerant charge (contained in outdoor unit) into the system. 4. Replace the stem caps and secure finger tight, then tighten an additional one-sixth (1/6) of a turn, 5. Check voltage supply at the disconnect switch. The voltage must be within the range listed on the unit's nameplate. If not, do not start the equipment until you have consulted the power company and the voltage condition has been corrected. CAUTION 6. Set the thermostat for a cooling demand. Turn on power to the indoor blower and close the outdoor unit disconnect switch to start the unit, 7. Recheck voltage while the unit is running. Power must be within range shown on the nameplate. 7. Shut off the nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge valves to release the nitrogen from the line set and indoor unit. 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 Refrigerant Charge Liquid Line Set Diameter 5/16 in. (8 mm) Units are factory charged with the amount of HCFC-22 refrigerant indicated on the unit nameplate, This charge is based on a matching indoor coil and outdoor coil with a 15 ft, (4.6 m) line set, For varying lengths of line set, refer to table 4 for refrigerant charge adjustment check. Table 4 per Line Set Lengths Oz. per 5 ft. (g per 1.5 m) adjust from 15 ft. (4.6 m) line set* 2 ounce per 5 ft, (57 g per 1.5 m) 3/8 in. (9.5 mm) 3 ounce per 5 ft, (85 g per 1.5 m) NOTE - *If line length is greater than 15 ft, (4,6 m), add this NOTE - The method of charging is determined by the unit's amount. If line length is less than 15 ft. (4.6 m), subtract this refrigerant metering device and the outdoor ambient amount, temperature. The outdoor unit should be charged during warm weather. Measure the liquid line temperature and the outdoor ambiHowever, applications arise in which charging must occur ent temperature as outlined below: in the colder months. Page 9 HS29 SERIES 1, Close manifold gauge set valves. Connect the manifold gauge set to the service valves: Page 10 504963M 03/06 ° low pressure gauge to vapor valve service port • high pressure gauge to liquid valve service port Table 5 Subcooling Outdoor Temp. °F(°C) 60 (16) 65 (18) 70 (21) 75 (24) 80 (27) 85 (29) 90 (32) 95 (35) 100 (38) 105 (41) 110(43) Values For Fixed Orifice Systems Liquid Subcooling [ + 1°F (.6°C) ] -012 12 (6.7) -018 19 (10.6) -024 -030 -036 -048 -060 14 (7.8) 14 (7.8) 13 (7.2) 16 (8.9) -042 17 (9.4) 15 (8.3) 13 (7.2) 13 (7.2) 12 (6.7) 11 (6.1) 10 (5.6) 9 (5.0) 8 (4.4) 14 (7.8) 13 (7.2) 13 (7.2) 13 (7.2) 13 (7.2) 13 (7.2) 12 (6.7) 13 (7.2) 12 (6.7) 12 (6.7) 12 (6.7) 11 (6.1) 11 (6.1) 11 (6.1) 15 (8.3) 14 (7.8) 12 (6.7) 11 (6.1) 10 (5.6) 8 (4.4) 7 (3.9) 16 (8.9) 15 (8.3) 14 (7.8) 13 (7.2) 12 (6.7) 10 (5.6) 10 (5.6) 15 (8.3) 14 (7.8) 14 (7.8) 13 (7.2) 13 (7.2) 12 (6.7) 11 (6.1) 11 (6.1) 11 (6.1) 10 (5.6) 9 (5.0) 7 (3.9) 6 (3.3) 4 (2.2) 17 (9.4) 16 (8.9) 14 (7.8) 12 (6.7) 10 (5.6) 9 (5.5) 8 (4.4) 3 (1.7) 6 (3.3) 7 (3.9) 12 (6.7) 10 (5.6) 6 (3.3) 8 (4.4) 10 (5.6) 3 (1.7) 6 (3.3) 6 (3.3) 11 (6.1) 10 (5.6) 4 (2.2) 7 (3.9) 10 (5.6) 2(1.1) 5(2.8) 6(3.3) 11 (6.1) 9(5.0) 3(1.7) 6(3.3) 9(5.0) 10 (5.6) 9 (5.0) 3 (1.7) 5 (2.8) 9 (5.0) 115 (45) 2 (1.1) 5 (2.8) 4 (2.2) NOTE - Use HS29-060 values for -062 and -065 units. 2, Connect the center manifold hose to an upright cylinder of HCFC-22, 3, Set the room thermostat to call for heat. This will create the necessary load for properly charging the system in the cooling cycle, 4, Use a digital thermometer to record the outdoor ambient temperature. 5. When the heating demand has been satisfied, switch the thermostat to cooling mode with a set point of 68 <_ F (20 <_ C), When pressures have stabilized, use a digital thermometer to record the liquid line temperature, 6. The outdoor temperature will determine which charging method to use, Proceed with the appropriate charging procedure, Weighing in the Charge - Fixed Orifice or TXV Systems - Outdoor Temp < 65°F (18°C) If the system is void of refrigerant, or if the outdoor ambient temperature is cool, the refrigerant charge should be weighed into the unit, Do this after any leaks have been repaired. 1, Recover the refrigerant from the unit, 2, Conduct a leak check, then evacuate as previously outlined. 3, Weigh in the unit nameplate charge, If weighing facilities are not available or if you are charging the unit during warm weather, follow one of the other procedures outlined below, 3. Use a temperature/pressure chart for HCFC-22 to determine the saturation temperature for the liquid line pressure reading. 4. Subtract the liquid line temperature from the saturation temperature (according to the chart) to determine subcooling. (Saturation temperature - Liquid line temperature = Subcooling) 5. Compare the subcooling value with those in table 5. If subcooling is greater than shown, recover some refrigerant. If subcooling is less than shown, add some refrigerant. NOTE - See HS29 3-phase unit charging sticker on unit for 3-phase charging information. Charging Using the Approach Method TXV Systems - Outdoor Temp. _>65°F (18 ° C) 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. 1, Attach high pressure gauge set and operate unit for several minutes to allow system pressures to stabilize. 2, Compare stabilized pressures with those provided in table 6, "Normal Operating Pressures." 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, Charging Using the Subcooling Method - Fixed Orifice Systems - Outdoor Temp. _>65°F (18°C) If you charge a fixed orifice system when the outdoor ambient is 65 _F (18 <_ C) or above, use the subcooling method to charge the unit. A IMPORTANT 1, With the manifold gauge hose still on the liquid service port and the unit operating stably, use a digital thermometer to record the liquid line temperature, 2, At the same time, record the liquid line pressure reading, Page 11 HS29 SERIES Table 6 Normal Mode Fixed Orifice TXV *These NOTE Operating Pressures In psig (liquid +/- 10 and vapor+/- Out. Coil HS29-012 HS29-018 HS29-024 HS29-030 HS29-036 HS29-042 HS29-048 HS29-060 Entering Air Temp. °F (°C) Liq Suc Liq Suc Liq Suc Liq Suc Liq Suc Liq Suc Liq Suc Liq Suc 65 (18.3) 139 57 150 69 147 58 160 64 165 62 169 72 168 73 158 67 75 (23.9) 165 67 175 74 174 63 185 67 192 66 197 75 195 75 185 71 85 (29.4) 192 73 201 79 204 68 216 71 223 69 227 78 225 78 216 74 95 (35.0) 222 78 229 82 234 75 248 73 257 71 259 80 257 80 247 77 105 (40.6) 254 81 262 86 272 77 284 76 292 73 294 83 291 82 283 79 65 (18.3) 141 60 149 76 143 71 154 68 162 66 159 76 154 75 154 75 75 (23.9) 164 64 173 78 170 73 174 70 190 67 188 78 183 76 181 77 85 (29.4) 193 72 197 81 202 73 204 70 224 68 222 78 216 77 213 79 95 (35.0) 222 77 228 82 236 75 246 72 257 71 257 79 251 78 249 80 105 (40.6) 255 81 260 85 271 76 276 74 296 72 294 80 288 79 285 82 are typical pressures - Use HS29-060 only. Indoor values for-062 match up, indoor air quafity using a digital 4. NOTE - See HS29 3-phase unit charging sticker on unit for 3-phase charging information. 5. Use the same digital thermometer you used to check the outdoor ambient temperature to check the liquid line temperature. 6. The difference between the ambient and liquid temperatures should match values given in table 7. If the values don't agree with the those in table 7, add refrigerant to lower the approach temperature, or recover refrigerant from the system to increase the approach temperature. NOTE - See HS29 3-phase unit charging sticker on unit for 3-phase charging information. Table 7 Approach Values HS29 Model -012 -018 -024 -030 -036 -042 -048 -060 Temp. °F(°C) 6 (3.3) 8 (4.4) 11 (6.1) 11 (6.1) 14 (7.8) 18 (10) 17 (9.4) 12 (6.7) Liquid Line Outdoor Approach Temperature Ambient Value and indoor the pressures to vary °F (°C) Temperature °F (°C) ° F ( ° C) Compressor Start Kit The -012, -018, and -024 single phase units have internal start components and do not require field installation of a compressor start kit. High and Low Pressure Switches (international units and units with factory-installed options) International units and units with factory-equipped options include high and low pressure switches. The pressure switches are located on valve cores in the liquid line to allow for easy access. The manually reset high pressure switch protects the system from high pressure conditions as a result of a fan failure or a blocked or dirty coil. The low pressure switch (SPST, NO) protects the system compressor from damage due to a loss of charge. The low pressure switch trips at 15 + 5 psig (103 + 34 kPa) and automatically resets at 25 + 3 psig (172 + 21 kPa). Maintenance and service must be performed by a qualified installer or service agency. NOTE - Use HS29-060 values for-062 and -065 units. Checking the Charge Pressures Using Normal Operating Use table 6 as a general guide for performing maintenance checks. Page 12 03/06 load will cause and -065 units. 3. Record outdoor ambient temperature thermometer. 504963M 5 PSIG)* Theoutdoorunitandindoorblowercycleondemandfrom theroomthermostat. Whenthethermostat blowerswitch is in theONposition,theindoorbloweroperates continuously.Checkamp-draw outdoorfanmotor. Unitnameplate Actual 2. Check connecting lines and coils for signs of oil leaks, 3. Check the condensate line and clean it if necessary, Indoor Unit 1, Clean or change filters, 2, 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, 3. Check blower drive belt for wear and proper tension. 4. Check all wiring for loose connections NOTE - If owner reports "insufficient cooling," the unit should be gauged and refrigerant charge checked, Refer to section on refrigerant charging in this instruction, At the beginning of each cooling season, should be checked as follows: the system 5, Check for correct voltage at unit (blower operating). 6, Check amp-draw on blower motor Unit nameplate Actual , WARNING Refer to the Engineering Handbook for optional accessories that may apply to this unit, The following may or may not apply: 1, Clean and inspect the outdoor coil. The coil may be flushed with a water hose, Ensure the power is turned off before you clean the coil, 2, Outdoor fan motor is prelubricated and sealed, No further lubrication is needed, 3, Check connecting lines and coils for signs of oil leaks, 4. Check wiring for loose connections. 5. Check for correct voltage at unit (unit operating), Indoor Coil 1, Clean coil, if necessary, • Loss of Charge Kit • High Pressure Switc Kit • Compressor Monitor • • Compressor Crankcase Heater Hail Guards • • Mounting Bases Timed Off Control • Stand-off Kit • Sound Cover • • SignatureStat'" Thermostat Low Ambient Kit Job Name Job no. Date Job Location City State Installer Unit Model No, City State Serial No, Service Technician Nameplate Voltage Rated Load Ampacity Maximum Fuse or Circuit Breaker Electrical Connections Tight? _1 Outdoor Fan Compressor Indoor Filter clean? Supply Voltage (Unit Off) Indoor Blower RPM S,R Drop Over Indoor (Dry) Outdoor Coil Entering Air Temp. Discharge Pressure __ Vapor Pressure Refrigerant Charge Checked? Outdoor Fan Checked? Refrigerant Lines: - Leak Checked? Service Valves: --- Fully Opened? Properly Insulated? _ Caps Tight? Voltage With Compressor Operating _ Thermostat Calibrated? _ Properly Set? _ Level? Page 13 HS29 SERIES
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