Panasonic U-72MF2U9 Installation Instructions Manual

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Panasonic U-72MF2U9 Installation Instructions Manual Manual pdf 8 page image

8LO LALFLMLBLCL2L3L4LGLDLHH2H3H1L12165ABC50 51 5232-12-23-1 3-244-1 4-241-5. Tubing LengthSelect the installation location so that the length and size of refrigerant tubing are within the allowable range shown in the figure below.NOTE* Be sure to use special R410A distribution joints (CZ: optional parts) for outdoor unit connections and tubing branches.Table 2 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights unit: ft. (m)Item Mark Contents LengthAllowable tubinglengthL1 Max. tubing length Actual length 656 (200)*2Equivalent length 689 (210)*2L (L2 – L4) Difference between max. length and min.length from the 1st distribution joint 164 (50)*5LMMax. length of main tubing (at maximum size)* Even after 1st distribution joint, LM is allowed if atmaximum tubing length.- *31, 2~ 52 Max. length of each distribution tube 164 (50)*6L1 + 1 + 2~ 51 + A+ B + LF + LG + LHTotal max. tubing length including length of each distributiontube (only liquid tubing) 1640 (500)A, B + LO, C + LO Maximum tubing length from outdoor’s 1st distributionjoint to each outdoor unit 33 (10)1-2, 2-2~ 52-2 Max. length between solenoid valve kit and indoor unit 98 (30)Allowable elevationdifferenceH1 When outdoor unit is installed higher than indoor unit 164 (50)When outdoor unit is installed lower than indoor unit 131 (40)H2 Max. difference between indoor units 49 (15)H3 Max. difference between outdoor units 13 (4)Allowable length ofjoint tubing L3 T-joint tubing (field-supply); Max. tubing length between thefirst T-joint and solidly welded-shut end point 6.6 (2) L = LengthH = HeightNOTE1: The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the tube ends.*2: If the longest tubing length (L1) exceeds 295 ft. (90m) (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the suctiontubes, discharge tubes and liquid tubes. Use a field supply reducer. Select the tube size from the table of main tubing size (Table 3) and fromthe table of refrigerant tubing size (Table 9).*3: If the longest main tubing length (LM) exceeds 164 ft. (50m), increase the main tubing size at the portion before 164 ft. (50m) by 1 rank for thesuction tubes and discharge tubes. Use a field supply reducer.For the portion that exceeds 164 ft. (50m), set based on the main tubing size (LA) listed in Table 3.4: When increasing the sizes of the main tubes (LM), it is not necessary to increase the rank for the discharge tubes of the outdoor unit 18, 20and 22 ton.*5: If the tubing length marked “L” (L2 - L4) exceeds 131 ft. (40m), increase the tubing size at the portion after the 1st distribution joint by 1 rankfor the liquid tube, suction tube and discharge tube.Refer to the Technical Data for the details.1. Main tubing length (maximum tubing size) LM = LA + LB …2. Main distribution tubes LC – LH are selected according to the capacity after the distribution joint.3. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that areconnected to the tube ends.4. Sizes of indoor unit connection tubing 1 – 52 are determined by the connection tubing sizes on the indoor units.R410A optional distribution jointCZ-P900PH1U (for outdoor unit)CZ-P224BH1U (for indoor unit)CZ-P680BH1U (for indoor unit)CZ-P1350BH1U (for indoor unit)Balance tubing(ø1/4" (6.35mm))Explanation of symbols1st distribution joint for outdoor unit1st distribution joint (for indoor unit)Distribution joint(CZ: optional parts)ForextensionForextensionSolenoid valve kitMax.1.3 ft (40cm)Max.1.3 ft (40cm)Solidly welded shut(pinch weld)Ball valve (field supply)T-joint (field supply)