Инструкция на Тепловые насосы Lennox серии HPXA...

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Тепловые насосы Lennox серии HPXA 19. Инструкция по монтажу.

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2004 Lennox Industries Inc. Dallas, Texas INSTALLATION INSTRUCTIONS HPXA19 SERIES UNITS HEAT PUMP UNITS 504,918M 05/04 Supersedes 03/04 Litho U.S.A. Table of Contents HPXA19 Outdoor Unit Lennox’ HPXA19 outdoor units use R410A which is an ozone friendly HFC refrigerant. This unit must be installed…
Unit Dimensions −− Inches (mm)
Parts Arrangement

run capacitor start capacitor (−024 unit only) system operation monitor defrost control outdoor fan (variable speed on 038 units) charge compensator (−038 and −048 units) contactor TXV/check valve discharge line compressor terminal plug vapor line low pressure switch discharge temperature thermostat…
Slab Mounting

Electrical When installing unit at grade level, top of slab should be high enough above the grade so that water from higher ground will not collect around unit. See figure 3. Slab should have a slope tolerance away from the building of 2 degrees or 2 inches per 5 feet (51 mm per 1.5 m). This will…
Typical Field Wiring Diagram
HPXA19−024, −036, −048, and −060 Wiring Diagram

Figure 8 Page 6
HPXA19−038 Wiring Diagram

Figure 9 Page 7
Installing Refrigerant Line

Refrigerant Piping If the HPXA19 unit is being installed with a new indoor coil and line set, the refrigerant connections should be made as outlined in this section. If an existing line set and/or indoor coil is going to be used to complete the HPXA19 system, refer to the following section which…
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 Liquid Line Wood Block Between Studs Wire Tie Inside Wall Strap Liquid Line Sleeve…
Installing Horizontal Runs

To hang line set from joist or rafter, use either metal strapping material or anchored heavy nylon wire ties. Wire Tie (around vapor line only) 8 feet Floor Joist or Roof Rafter Tape or Wire Tie 8 feet Strapping Material (around vapor line only) Metal Sleeve Tape or Wire Tie Floor Joist or Roof…
Transition From Vertical To Horizontal

Automotive Muffler-Type Hanger Anchored Heavy Nylon Wire Tie Wall Stud Wall Stud Strap Liquid Line To Vapor Line Strap Liquid Line To Vapor Line Liquid Line Metal Sleeve Vapor Line Wrapped in Armaflex Liquid Line Metal Sleeve Vapor Line Wrapped in Armaflex Figure 12 Outside Unit Placement and…
Isolation Grommets

Locate the provided isolation grommets. Use a knife to slit the webbing on each grommet. Slide larger grommet onto vapor line and smaller grommet onto liquid line. Insert grommets into mullion to isolate refrigerant lines from sheet metal edges. See figure 14 for installation of the indoor check…
that the entire system is completely void of refrigerant

Disconnect the liquid and vapor lines from the existing outdoor unit. If the existing outdoor unit is equipped with manual shut−off valves AND you plan to use NEW R22 refrigerant to flush the system −− Start the existing R22 system in the cooling mode and close the liquid line valve. Pump all of the…
Flushing Connections

Inverted R22 Cylinder (Contains clean R22 to be used for flushing) LOW HIGH PRESSURE PRESSURE HPXA19 Unit VAPOR LINE SERVICE VALVE EXISTING VAPOR LINE Existing GAUGE MANIFOLD EXISTING LIQUID LINE OPENED LIQUID LINE SERVICE VALVE Indoor Coil CLOSED TANK RETURN NOTE − The inverted R22 cylinder must…
Service Valves

Liquid Line Service Valve (Valve Closed) The liquid line and vapor line service valves (figures 16 and 17) and gauge ports are used for leak testing, evacuating, charging, and checking charge. See table 1 for torque requirements. Each valve is equipped with a service port which has a…
3 − Open the high pressure side of the manifold to allow

the R410A into the line set and indoor unit. Weigh in a trace amount of R410A . [A trace amount is a maximum of 2 ounces (57 g) or 3 pounds (31 kPa) pressure.] Close the valve on the R410A cylinder and the valve on the high pressure side of the manifold gauge set. Disconnect the R410A cylinder. 4 −…
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…
HPXA19 Cooling Cycle

(Showing Gauge Manifold Connections) OUTDOOR UNIT DISTRIBUTOR REVERSING VALVE NOTE − ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW EXPANSION/ CHECK VALVE BIFLOW FILTER / DRIER OUTDOOR COIL INDOOR UNIT LOW HIGH PRESSURE PRESSURE MUFFLER GAUGE MANIFOLD TO R410A DRUM LIQUID LINE SERVICE PORT VAPOR…
3 − Use a temperature/pressure chart for R410A to determine the saturation temperature for the liquid line pressure reading. See table 7. 4 − Subtract the liquid line temperature from the saturation temperature (according to the chart) to determine subcooling. (Saturation temperature − Liquid line…
Table 5

Normal Operating Pressures: Cooling Operation (Liquid ±10 and Vapor ±5 psig) First Stage (Low Capacity) Outdoor Coil Entering Air Temp. °F (°C) HPXA19−024 Liquid Vapor HPXA19−036 HPXA19−038 HPXA19−048 HPXA19−060 Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor 65 (18.3) (23.9) (29.4) (35.0)…
Table 7

R410A Temperature/Pressure Chart Temperature °F Pressure Psig Temperature °F Pressure Psig Temperature °F Pressure Psig Temperature °F Pressure Psig 100.8 102.9 105.0 107.1 109.2 111.4 113.6 115.8 118.0 120.3 122.6 125.0 127.3 129.7 132.2 134.6 137.1 139.6 142.2 144.8 147.4 150.1 152.8 155.5 158.2…
System Operation

System Operation Monitor The outdoor unit and indoor blower cycle on demand from the room thermostat. When the thermostat blower switch is in the ON position, the indoor blower operates continuously. LED Thermostat Operation Some indoor thermostats incorporate isolating contacts and an emergency…
Table 8

System Operation Monitor Codes Status LED Status LED Description Status LED Troubleshooting Information Green Power" Module has power. Red Trip" Thermostat demand signal Y1 is present, but the compressor is not running. NOTE − during 5 minute delay in defrost board the red trip" light will be on.…
Table 9

Low Ambient Thermostat Setpoints Low Ambient Thermostat Adjustable Range Factory Setting Min. Max. Cut-In (Close on Temperature Drop) 40+2°F 37+2°F 55+2°F Cut-Out (Open on Temperature Rise) 50+2°F 47+2°F 65+2°F Regional climatic conditions may require the control to be adjusted to a different…
HPXA19 Defrost Control Board

Note − Component Locations Will Vary With Board Manufacturer test pins pressure switch circuit connections diagnostic LEDs 24V terminal strip connections Y2 DELAY reversing valve field select temperature pins Y2 coil sensor ambient sensor Figure 24 Low Pressure Switch (LO−PS) The unit’s automatic…
Table 10

Defrost Control Board Diagnostic Led (5−Strike) LED 1 LED 2 Condition Possible Cause(s) 1 No power (24V) to board terminals OFF OFF Power problem R & C. 2 Board failure. 1 Coil temperature outside of sensor ON ON Coil sensor problem range. 2 Faulty sensor wiring connections at board or poor sensor…
Outdoor Unit

Disposable filters should be replaced with a filter of the same type and size. If you are unsure about the filter you need for your system, call your Lennox dealer for assistance. The outdoor and indoor coils should be inspected and cleaned. The outdoor coil may be flushed with a water hose. NOTE −…
to the Emergency Heat" setting to obtain temporary heat

without the risk of serious equipment damage. In this operating mode, all heating demand will be satisfied by auxiliary heat. Compressor operation is locked out during Emergency Heat operation. After a six-hour compressor crankcase heater warm-up period, the thermostat can be switched to the Heat"…

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