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Инструкция по эксплуатации EMI, модель S2HA

Производитель: EMI
Размер: 2.83 mb
Название файла: 1053.pdf

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The units are delivered precharged with refrigerant for the condenser coil and the evaporator. Charging of the field installed piping is required. Refer to the refrigerant charge table for the proper amount to be added for the applications interconect piping. Unit service valves are solid brass, for sweat connections. IMPORTANT: All systems require field charge adjustments. Refer to the "Refrig- erant Charge Tables" for proper weight charge and to the supplied “Field Charging Charts" for proper system pressures and temperature at different outdoor condi- tions. Superheat should be used for final system charge in cooling mode. Subcool should be used for final system charge in heating mode. RECAP OF COMPLETING PIPING CONNECTIONS Pressure test all field installed piping and the indoor air handler with nitrogen. Using a suitable vacuum pump, evacuate the tubing and indoor unit to 500 microns or less, with service values remaining front seated (closed). Before releasing the refrigerant from the condenser, be sure the manifold gauge set is closed so as not to lose vacuum when shutting down the pump. Release refrigerant from the condensing unit by back seating the service value. Allen wrenches are used to open the valve. Replace valve caps. Be Careful to not back seat the valves past the snap flanges that hold the valve core in place. 12Multi-zone Heat Pump Condensing Units S2HA & T2HA REFRIGERANT PIPING INSTALLATION SECTION S2HA & T2HA REFRIGERANT CHARGE TABLE Circuit Capacity Btuh 9000 12000 18000 24000 Evaporator Pairing WLHA09 CAHB12 WLHA12 CAHB12 WLHA24 CAHB24 WLHA24 CAHB24 Line Chg/ft Line Length Line Adjust FactoryCharge Total Charge 10 ft 3 oz 45 oz 0.25 oz 25 ft 6 oz 42 48 oz 50 ft 13 oz 55 oz 10 ft 3 oz 49 oz 0.25 oz 25 ft 6 oz 46 52 oz 50 ft 13 oz 59 oz 10 ft 6 oz 86 oz 0.56 oz 25 ft 14 oz 80 94 oz 50 ft ** 28 oz ** 108 oz 10 ft 6 oz 86 oz 0.56 oz 25 ft 14 oz 80 94 oz 50 ft 28 oz 108 oz ** Any 18,000 Btuh circuit with more than 57 feet of tubing (> 112 oz of total refrigerant charge) requires a 25W wrap around Crank Case Heater. FIELD CHARGING IMPORTANT NOTES: 1. To find the charge adjustment and system charge for any evaporator and tubing length: Line Adjustment = (Line Chg/Ft) x Line Length System Total = Factory Charge + Line Adjustment 2. Round to the nearest ounce and allow for gauges and hoses. 3. Use R22 refrigerant. The use of the superheat method is highly recommended for field charging or checking the existing refrigerant charge in a system. Because each installation is different in terms of indoor air flow, refrigerant line length, etc.., the factory charge may not be correct for every application. To assure the best performance from the air-conditioner, the refrigerant charge should be checked and adjusted, if need be, on each installation. For proper superheat readings, a standard low-side refrigerant gauge and an accurate thermometer are needed. A mercury or stem-type thermometer is not adequate for suction-line temperatures. We recommend electric thermocouple thermometers (available at most refrigeration wholesal ers); however an accurate remote-bulb thermometer can be used. When measuring the line temperature, be sure the thermometer is well insulated to assure accurate measurements. The chart below gives superheat values at various outdoor temperatures. Allow at least 5 minutes running time between charge adjustments for the unit to stabilize. The S & T series (S2HA, T2HA, T3HA & T4HA) has manifold access points on each of the service valves for the high and low pressures in cooling mode. There is an additional “common suction” access point above each service valve set to provide low pressure access in the heating mode as both service valves are at high side pressure. 13Multi-zone Heat Pump Condensing Units MULTI-ZONE HEAT PUMP FIELD CHARGING Cooling CycleCooling Cycle 9,000 Btuh Circuit 12,000 Btuh Circuit with EMI’s-WLHA09 or CAHB12 (....................with EMI’s-WLHA12 or CAHB12 (.................... ..... ..... ............................. ............................. ......................................... ......................................... ................................................ . ............................................................................ . ...................................... . ................................................ . ...................................... ..... ..... ......... ......... ......... ......... ......... ......... ....... ..... ..... ..... ....... ..... ....... ..... ..... ..... ....... ..... ................................... ................................... Note: Minimum compressor superheat 5° F Note: Minimum compressor superheat 5° F 14Multi-zone Heat Pump Condensing Units MULTI-ZONE HEAT PUMP FIELD CHARGING Cooling Cycle 18,000 Btuh Circuit with EMI’s-WLHA24 or CAHB24 (................... Cooling Cycle 24,000 Btuh Circuit with EMI’s-WLHA24 or CAH...