Lennox SSB*H4 Скачать руководство пользователя страница 19

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Page 19

Sequence of Operation SSB*H4

NOTE − First and second stage cool operate independent of each other and can modulate back and
forth according to thermostat demand.

First Stage Cool (low capacity)

1. Cooling demand initiates at Y1 in the thermostat.

2. Voltage from terminal Y passes through S4 high pressure switch, energizes K1 compressor

contactor, passes through S87 low pressure switch and returns to common side of the
24VAC power.

3. K1 closes energizing B1 compressor and B4 outdoor fan.

4. Solenoid L34 is NOT energized so the slider ring remains open, limiting compressor to low

capacity.

Second Stage Cool (high capacity)

Compressor is operating in first stage cool

5− Second stage thermostat demand sends voltage to rectifier plug D4. D4 converts the AC voltage to

DC voltage and energizes L34 unloader solenoid. L34 then closes the slider ring, allowing the
compressor to operate at high capacity.

Содержание SSB*H4

Страница 1: ...e must be performed by a qualified installer or service agency WARNING Warranty will be voided if covered equipment is re moved from original installation site Warranty will not cover damage or defect...

Страница 2: ...oor Fan Diameter in 22 22 26 Fan No of blades 4 4 3 Motor hp 1 6 1 4 1 3 Cfm 3060 3955 4380 Rpm 845 835 850 Watts 215 320 280 Shipping Data lbs 1 pkg 229 257 309 ELECTRICAL DATA Line voltage data 60hz...

Страница 3: ...Delay Relay 58M81 NOTE Extremes of operating range are plus 10 and minus 5 of line voltage 1 Refrigerant charge sufficient for 15 ft length of refrigerant lines 2 HACR type breaker or fuse 3 Refer to...

Страница 4: ...panels consider any weather conditions especially windy conditions that may cause panels to be blown around and battered Remove the louvered panels as follows 1 Remove 2 screws allowing the panel to s...

Страница 5: ...RE 3 DUAL CAPACITOR C12 COMPRESSOR CONTACTOR K1 CONTROL BOX GROUNDING LUG 1 Compressor Contactor K1 The compressor is energized by a single pole contactor lo cated in the control box See figure 3 K1 i...

Страница 6: ...ssor can be used to pump down refrigerant as long as the pressure is not reduced below 7 psig NOTE During operation the head of a scroll compressor may be hot since it is in constant contact with disc...

Страница 7: ...RBIT STATIONARY SCROLL ORBITING CRESCENT SHAPED GAS POCKET HIGH PRESSURE GAS DISCHARGE POCKET FLANKS SEALED BY CENTRIFUGAL FORCE 1 2 3 4 SUCTION INTERMEDIATE PRESSURE GAS SUCTION POCKET FIGURE 5 Bypas...

Страница 8: ...Procedure 1 Turn main power OFF to outdoor unit 2 Adjust room thermostat set point above heating opera tion on heat pump or below cooling operation the room temperature 5 F 3 Remove control access pa...

Страница 9: ...nector end of the full wave rectifier plug The DC voltage reading should be 1 5 to 3 volts lower than the input voltage to the plug wire leads EX Input volt age is 24VAC output voltage is 22VDC See fi...

Страница 10: ...h is closed during normal operating pressure conditions and is permanently adjusted to trip open at 40 5 psi The switch automatically resets when suction line pressure rises above 90 5 psi Under certa...

Страница 11: ...ure 3 years refrigerated 10N44 Moisture Test Tubes Checkmate RT751 Tubes three pack 6 12 months room temperature 2 years refrigerated 74N40 Easy Oil Test Tubes Checkmate RT752C Tubes three pack 2 3 ye...

Страница 12: ...th a hex head extension to back the stem out counterclockwise as far as it will go NOTE Use a 3 16 hex head extension for 3 8 line sizes or a 5 16 extension for large line sizes 3 Replace the stem cap...

Страница 13: ...of the manifold to allow the R 410A into the line set and indoor unit Weigh in a trace amount of R 410A A trace amount is a maximum of 2 ounces 57 g or 3 pounds 31 kPa pressure Close the valve on the...

Страница 14: ...en met disconnect the manifold hose from the vacu um pump and connect it to an upright cylinder of R 410A refrigerant Open the manifold gauge valves to break the vacuum from 1 to 2 psig positive press...

Страница 15: ...al thermometer to record the liquid line temperature 6 The outdoor temperature will determine which charging method to use Proceed with the appropriate charging procedure Charge Using Weigh in Method...

Страница 16: ...ble 8 Normal Operating Pressures Pressures high er than those listed indicate that the system is over charged Pressures lower than those listed indicate that the system is undercharged A temperature p...

Страница 17: ...oil Drier must be replaced to eliminate mois ture from POE oil VI MAINTENANCE WARNING Electric shock hazard Can cause inju ry or death Before attempting to per form any service or maintenance turn the...

Страница 18: ...K1 compressor contactor passes through S87 low pressure switch and returns to common side of the 24VAC power 3 K1 closes energizing B1 compressor and B4 outdoor fan 4 Solenoid L34 is NOT energized so...

Страница 19: ...passes through S87 low pressure switch and returns to common side of the 24VAC power 3 K1 closes energizing B1 compressor and B4 outdoor fan 4 Solenoid L34 is NOT energized so the slider ring remains...