Unico IS18G050 Installation Instructions

Bulletin 30-121.2014.04.014
(SAC 37.4255.109.00)
5
Copyright © 2014 Unico, Inc.
L2
There are five rules for the refrigerant tubing related to length and height between components.
#1: (Height) The highest indoor unit must be less than 32 ft above the outdoor unit.
#2: (Height) The lowest indoor unit must be less than 32 ft. below the outdoor unit.
#3: (Height) The highest indoor unit must be less than 19 ft. above the lowest indoor unit.
#4: (Length) The longest distance from any indoor unit to the outdoor unit must be less than L1, L2, L3, L4.
#5: (Length) The sum total of distance of each indoor unit to the outdoor unit must be less than Ltot.
IL00533a.CVX
L Tot. = Total length of all line sets (L1 + L2 + L3...)
Maximum line length allowed
* REQUIRED AMOUNT OF ADDITIONAL REFRIGERANT (R-410A)
For 1/4" x 3/8" line set = 0.16 oz/ft (15g/m)
For 1/4" x 1/2" line set = 0.22 oz/ft (20g/m)
Example: IS18G050 as single-split with 1/4 x 3/8 line set of 60 ft, The excess line length is 35 ft. So add 35x0.16= 5.6 oz.
R-410A.
No additional charge of compressor oil is necessary.
INDOOR UNIT
INDOOR UNIT
L1
L2
maximum
32 ft (10 m)
maximum
19 ft (6 m)
OUTDOOR
UNIT
L3
INDOOR UNIT
INDOOR UNIT
L4
maximum
32 ft (10 m)
TUBING DESIGN LIMITS
Outdoor unit
Number of IDU
PRE-CHARGED (AS SHIPPED)
WITH ADDITIONAL REFRIGERANT*
L Tot.
L1, L2, L3, L4
L Tot.
L1, L2, L3, L4
IS18G050
SINGLE-SPLIT
25 ft (7.5 m)
-
65 ft (20 m)
-
DUAL-SPLIT
50 ft (15 m)
40 ft (12 m)
100 ft (30 m)
80 ft (25 m)
IS24G065
SINGLE-SPLIT
65 ft (20 m)
-
115 ft (35 m)
-
DUAL-SPLIT
100 ft (30 m)
80 ft (25 m)
150 ft (45 m)
100 ft (30 m)
TRI-SPLIT
100 ft (30 m)
65 ft (20 m)
150 ft (45 m)
80 ft (25 m)
IS30G080
IS36G110
SINGLE-SPLIT
100 ft (30 m)
-
164 ft (50 m)
-
DUAL-SPLIT
130 ft (40 m)
100 ft (30 m)
210 ft (65 m)
100 ft (30 m)
TRI-SPLIT
130 ft (40 m)
100 ft (30 m)
210 ft (65 m)
100 ft (30 m)
QUAD-SPLIT
130 ft (40 m)
100 ft (30 m)
210 ft (65 m)
100 ft (30 m)

Unico IS18G050 Specifications

General

Brand	Unico
Model	IS18G050
Category	Heat Pump
Language	English