Daikin RELQ72TBTJ Series Installation Manual page 16

System air conditioner

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Operation manual (19 pages)

Table Of Contents

Table of Contents

From branch to indoor

unit via 1 Branch

Selector unit

Allowable

length after

From branch to indoor

branch (*5)

unit via Branch Selec-

tor units connected in

pass through

(*4) In the case of an outdoor units multi system, "outdoor unit" should be read as the "first outdoor unit multi connection piping kit", seen from the

indoor units side.

(*5) A multi Branch Selector unit is to be considered as a branch (a single Branch Selector unit is not), so in the case where only 1 multi Branch Se-

lector unit is included in the system, the actual piping length from each branch port of the multi Branch Selector unit to each indoor units should

be ≤130 ft. (40 m).

(*6) In the case where the equivalent piping length from outdoor units to indoor units ≥295 ft. (90 m), make sure to upsize the liquid pipe of the main

pipe (see the figure below), referring to the table below. (Do not upsize the high/low pressure gas pipe and the suction gas pipe.)

Outdoor unit capacity type

RELQ 72,96 T type

RELQ 120,144 T type

RELQ 192,240 T type

(*7) It can be extended to ≤295 ft. (90 m) (if outdoor unit is lower than indoor unit, ≤195 ft. (60 m) by field setting [2-35] on page 34). See

[2-49]=Height difference setting on page 35.

(*8) For Branch Selector unit connected in pass through installation, all three conditions below must be satisfied.

1. Maximum capacity index of connectable indoor units for BSF6, 8Q54T* is ≤162 per Branch Selector unit.

2. Maximum capacity index of connectable indoor units under Branch Selector units connected in pass through is ≤230.

3. Total number of ports of Branch Selector units connected in pass through is ≤12.

(*9) When conditions listed in the table below are all satisfied, the allowable length restrictions after branch is ≤295 ft. (90 m). For Branch Selector

unit connected in pass through installation, also (*8) must be satisfied.

Actual piping length from the first REFNET joint or REFNET header to indoor

unit: ≤130 ft. (40 m) (*9)

(Example) 4 : e+h+j≤130 ft. (40 m), 7 : b+c+d+m+n+p≤130 ft. (40 m)

Actual piping length

Actual piping length from the first REFNET joint or REFNET header to indoor

unit: ≤130 ft. (40 m) (*8) (*9)

(Example) 11 : b+r+u+w≤130 ft. (40 m)

Liquid pipe

φ3/8 in. (9.5 mm) →

φ1/2 in. (12.7 mm)

φ1/2 in. (12.7 mm) →