Daikin VRV III REMQ72PBYD Engineering Data

Installation EDUS391004-N78 Installation of Outdoor UnitsRequired Conditions Example Drawings1. It is necessary to increase the pipe size if the pipe lengthbetween the first branch kit and the final branch kit is over than130 ft. (Reducers must be procured on site)If the increased pipe size is larger than main pipe size, thenincrease the main pipe size to the same pipe size.2. For calculation of Total extension length, the actual length ofabove pipes must be doubled.(except main pipe and the pipes that are not increased)3. Indoor unit to the nearest branch kit ≤ 130 ft.4. The difference between[Outdoor unit to the farthest indoor unit]and [Outdoor unit to the nearest indoor unit] ≤ 130 ft.8 b + c + d + e + f + g + p ≤ 295 ft.increase the pipe size of b, c, d, e, f, ga + b × 2 + c × 2 + d × 2 + e × 2 + f × 2 + g × 2+ h + i + j + k + + m + n + p ≤ 3280 ft.h, i, j....... p ≤ 130 ft.The farthest indoor unit 8The nearest indoor unit 1( a + b + c + d + e + f + g + p ) - ( a + h ) ≤ 130 ft.Increase the pipe size as followsφ3/8 → φ1/2φ1/2 → φ5/8φ5/8 → φ3/4φ3/4 → φ7/8φ7/8 → φ1*φ1-1/8 → φ1-1/4*φ1-3/8 → φ1-1/2*aA B C D E F Gb c d e f gh i j k m n1 2 3 4 5 6 78H1pOutdoor unit REFNET joint (A-G)Indoor units ( 1 - 8 )*If available on the site, use this size. Otherwise it can not be increased.How to calculate theadditional refrigerantto be charged[HEAT RECOVER SYSTEM]Additional refrigerant tobe charged : R(lb)R should be roundedoff in units of 0.1 lb.R = (Total length (ft)of liquid pipingsize at φ5/8)(Total length (ft)of liquid pipingsize at φ3/8)(Total length (ft)of liquid pipingsize at φ1/2)(Total length (ft)of liquid pipingsize at φ1/4)0.1210.0400.0810.0151.02HEAT RECOVER SYSTEMMODEL NAME THE AMOUNT OFREFRIGERANTREYQ72 ~ 120PBYDREYQ72 ~ 144PBTJ 7.9 lbREFRIGERANT AMOUNT FOR EXCEEDINGCONNECTION CAPACITY OF INDOOR UNITINDOOR CONNECTIONCAPACITYMORE THAN 100%120% OR LESSMORE THAN 120%130% OR LESSMODEL NAMEREYQ72 ~ 120PBYDREYQ72 ~ 144PBTJ1.1 lb1.1 lbExample for refrigerant branch using REFNET joint and REFNET header for systems and each pipe length as shown below.Outdoor system : REYQ120PBYDTotal capacity of indoor unit : 116% a : φ3/8 × 15ft.b : φ3/8 × 10ft.c : φ3/8 × 5ft.d : φ3/8 × 5ft.e : φ3/8 × 5ft.f : φ3/8 × 5ft.g : φ3/8 × 5ft.h : φ3/8 × 5ft.i : φ3/8 × 5ft.j : φ3/8 × 5ft.k : φ3/8 × 10ft.: φ3/8 × 10ft.m : φ1/2 × 10ft.n : φ3/8 × 5ft.o : φ1/4 × 5ft.p : φ1/2 × 5ft.Note 1.When the equivalent pipe length between outdoor and indoor units is 295 ft or more,the size of main pipes on the liquid side (refer to figure 15)must be increased according to the right table.(Never increase suction gas pipe and HP/LP gas pipe.)(Refer to figure 15)1.Outdoor unit2.Main pipes3.Increase only liquid pipe size4.First refrigerant branch kit5.BS unit6.Indoor unitNote 2.Allowable length after the first refrigerant branch kit to indoor units is 130 ft or less, however it can be extended up to 295ft if all the following conditions are satisfied. (In case of "Branch with REFNET joint")SystemREYQ72 · 96P typeREYQ120 · 144P typeLiquid pipeφ3/8 → φ1/2φ1/2 → φ5/8R = ( 10 × 0.081 + 90 × 0.040 + 5 × 0.015 ) × 1.02 + 7.9 + 1.1m a~ , n o REYQ120PBYD116%= 13.574 13.6 lbRound off in units of 0.1 lb.3P215731-12R*If the increased pipe size is larger than the main pipe size, increase the main pipe size to the same as the increased size.If the specified pipe diameter is not available onsite, do NOT substitute a pipe of greater diameter.