Piping Length Requirements; Preparing Water Piping; Water Quality Requirements - Daikin VRV W T Serie Manual De Instalación

4 .3 .7

Piping length requirements

In case of heat pump mode
First branch
7
11
6
10
12
b b
1
b
Y
a
a
If actual piping length of indoor units 48 types, 54 types, and 72
types, 96 type where difference from the indoor unit (Y) nearest to
the outside unit is more than 130 ft (40 m),
Example:
b is neither 48 types nor 54 types nor 72 types nor 96 type
*b is 48 types or 54 types or 72 types or 96 type
(6+11)–(6+10)<130 ft (40 m)
(7+12+17)–(6+10)<130 ft (40 m)
(7+13+17)–(6+10)<130 ft (40 m)
(7+8+14)–(6+10)>130 ft (40 m)
(7+8+9+15)–(6+10)>130 ft (40 m)
(7+8+9+16)–(6+10)>130 ft (40 m)
please size up both liquid pipe and gas pipe until the closest branch.
(14, 16)
If the actual pipe length difference after the first branch is more than
130 ft (40 m), please size up the piping until the last branch. (Liquid
pipe and gas pipe at Heat pump mode) (7, 8, 9).
The total piping length:
1+(7+8+9+14+16)×2+6+10+11+12+13+15+17)≤980 ft (300 m)
If size exceeds the main pipe size due to size increase, please also
size up main pipe according to
page 11.
4 .4

Preparing water piping

4 .4 .1

Water quality requirements

Item
(a)
Standard items
pH (77°F (25°C))
Electrical conductivity (mS/ft (mS/m)) (77°F
(25°C))
Chloride ions (mg Cl /l)
–
Sulfate ions (mg SO /l)
2–
4
Acid consumption (pH 4.8) (mg CaCO
Total hardness (mg CaCO /l)
3
Calcium hardness (mg CaCO /l)
3
RWEQ96~432TATJU + RWEQ96~432TAYDU
VRV W T-Series water-cooled system air conditioner
4P484115-1A – 2017.10
Furthest
branch
8 9 16
17 14 15
c
13
b
*b
b
"4.3.2 To select the piping size" on
Cooling water
circulation system
Circulation
water
6.5~8.2
<24.4 (80)
<200
<200
/l) <100
3
<200
<150
In case of heat recovery mode
First branch
7
11
6
B1 d B2 d
10
b b
1
Y
*b
a
a
B1-B6 Branch selector unit
If actual piping length of indoor units 48 types, 54 types, and 72
types, 96 type where difference from the indoor unit (Y) nearest to
the outside unit is more than 130 ft (40 m),
Example:
b is neither 48 types nor 54 types nor 72 types nor 96 type
*b is 48 types or 54 types or 72 types or 96 type
(6+11)–(6+10)<130 ft (40 m)
(7+12+17)–(6+10)<130 ft (40 m)
(7+13+17)–(6+10)<130 ft (40 m)
(7+8+14)–(6+10)>130 ft (40 m)
(7+8+9+15)–(6+10)>130 ft (40 m)
(7+8+9+16)–(6+10)>130 ft (40 m)
(7+8+9+15+18)–(6+10)>130 ft (40 m)
(7+8+9+15+19)–(6+10)>130 ft (40 m)
please size up both liquid pipe and gas pipe until the closest branch.
(14, 16, 18)
If the actual pipe length difference after the first branch is more than
130 ft (40 m), please size up the piping until the last branch. (Liquid
pipe only at Heat Recovery mode) (7, 8, 9).
The total piping length:
1+(7+8+9+14+16+18)×2+6+10+11+12+13+15+17+19)≤980 ft (300 m)
If size exceeds the main pipe size due to size increase, please also
size up main pipe according to
page 11.
and Hot water system
(b)
Make-up Circulation
water water
(68~140°F)
(20~60°C)
6.0~8.0 7.0~8.0
<9.1 (30) <9.1 (30)
<50 <50
<50 <50
<50 <50
<70 <70
<50
4 Preparation
Furthest
branch
8 9
17 14 15
B3 c B4 d B5
*b
12 13 18 19
b b *b
"4.3.2 To select the piping size" on
Tendency
(c)
Make-up Corrosion
water
○
○
○
○
Installation manual
16
c B6 d
*b
b
(d)
Scale
○
○
○
○
○
15