Page 3 - These are not back-seating valves. It is not necessary
3 Heat pumps require special location consideration in areasof heavy snow accumulation and/or areas with prolongedcontinuous subfreezing temperatures. Heat pump unit basesare cutout under the outdoor coil to permit drainage of frostaccumulation. Units must be situated to permit free unob-structed dr...
Page 4 - NOT; The ends of the refrigerant lines must be cut square,; System Evacuation; and
4 NOTE: Be careful not to kink or dent refrigerant lines. Kinked or dented lines will cause poor performance or compressordamage. Do NOT make final refrigerant line connection until plugs are removed from refrigerant tubing. 1. The ends of the refrigerant lines must be cut square, deburred, cleaned,...
Page 5 - FINAL CHARGE ADJUSTMENT
5 1. 3/8" valve to 5 - 10 in-lbs (0.56-1.30 Nm)2. 5/8" valve to 5 - 20 in-lbs (0.56-2.26 Nm)3. 3/4" valve to 5 - 20 in-lbs (0.56-2.26 Nm)4. 7/8" valve to 5 - 20 in-lbs (0.56-2.26 Nm) Do not introduce liquid refrigerant from the cylinder into thecrankcase of the compressor as this may...
Page 6 - FIGURE; II. REFRIGERANT CHARGE DETERMINATION AND; WARNING
6 AIRFLOW – Liters per second (L/s) HEAT OUTPUT 2 0 0 2 5 0 3 0 0 3 5 0 4 0 0 4 5 0 5 0 0 5 5 0 6 0 0 6 5 0 7 0 0 7 5 0 8 0 0 8 5 0 9 0 0 9 5 0 1 0 0 0 1 0 5 0 1 1 0 0 1 1 5 0 1 2 0 0 1 2 5 0 KW TEMPERATURE RISE ( ° C) 3 12.4 9.9 8.3 7.1 6.2 4 16.6 13.3 11.0 9.5 8.3 7.4 6.6 5 20.7 16.6 13.8 11.8 10....
Page 7 - TABLE II - Line Charge; SYSTEM SUPERHEAT
7 4. Determine the systems superheat as follows: a. Read the system’s suction pressure, then using Table III determine the system’s saturated suction temperature. b. Read the suction line temperature. c. The system’s superheat = the suction line tempera ture - the saturated liquid temperature. SUCTI...
Page 8 - CAUTION
8 6. Remove the service gauge set’s lines carefully - Escap- ing liquid refrigerant can cause burns. CAUTION To prevent personal injury, carefully connect and disconnectmanifold gauge hoses. Escaping liquid refrigerant can causeburns. Do not vent refrigerant into the atmosphere. Recoverall refrigera...
Page 10 - Heat Pump Refrigerant Circuit; reversing valve
10 The following figures show a schematic of a heat pump onthe cooling cycle and the heating cycle Heat Pump Refrigerant Circuit In In addition to a reversing valve , a heat pump is equipped with an expansion device and check valve for the inside coil, andsimilar equipment for the outside coil. It i...
Page 12 - must be taken
12 REFRIGERANT LINE LENGTH (meters) Cond 0-7.3 7.4-14.9 15.0-22.6*** 22.7-30.5 30.6-38.0 38.1-45.4 Unit Line Diameter OD (mm) Tons Suct Liq Suct Liq Suct Liq Suct Liq Suct Liq Suct Liq 1-1/2 15.9 6.4 19.1 9.5 19.1 9.5 19.1 9.5 19.1 9.5 22.2 9.5 2 15.9 6.4 19.1 9.5 19.1 9.5 22.2 9.5 22.2 9.5 22.2 9.5...