3e:T750,Piping design 1. 2. 3. Main piping length LM = LA + LB 80 m Main distribution pipes LC-LH are selected according to the capacity after the distribution joint. Size of indoor unit connection piping 1-40 are determined by the connection piping size on the indoor units. L5 H3 C L2 LM B Balance pipe (Ă¸ 6.35) L1 A LO LB LC LD LE LA H1 4 LF Within 400 mm 6 5 40 For extension For extension Within 400 mm LH 1 LG Solenoid Valve Kit 2 H2 3 L4 Symbol explanation Distribution joint (CZ-accessory, option) Ball valve (BV, option) Note: Do not use commercial T-pieces for the liquid pipes of and . * Be sure to use R410A distribution joints for outdoor unit connections and piping branches. Ranges that apply to refrigerant piping lengths and to differences in installation heights Items Allowable piping length Allowable elevation difference Mark Contents Length (m) Actual piping length < =180 < =200 L1 Max. piping length Î” L (L2 - L4) Difference between the max. length and the min. length from the No.1 distribution joint LM Max. length of main piping (at max. diameter) 1, 2~40 Max. length of each distribution < =80 < =30 L1+1+2+ ~ 40 +A+B+LF+LG+LH Total max. piping length including length of each distribution (only narrow tubing) < =500 L5 Distance between outdoor units < =10 < =50 H1 Equivalent piping length When outdoor unit is installed higher than indoor unit When outdoor unit is installed lower than indoor unit H2 Max. difference between indoor units H3 Max. difference between outdoor units < =40 < =40 < =15 < =4 Note 1: The outdoor connection main piping (LO part) depends on the total capacity of the outdoor units connected to the end. Note 2: When the main piping length (L1) (equivalent length) exceeds 90 m, increase the size of both the gas and liquid main piping (LM) by 1 step. 363f:T4a4,FSV MF2 Series System limitations Max. number of combined outdoor units 3 Max. HP of combined outdoor units 135 kW (48 hp) Max. number of connectable indoo