Heating Example - Fujitsu AUYG07LVLA Design & Technical Manual

3-2-2.

HEATING EXAMPLE

EXAMPLE 3
Outdoor unit
Indoor unit 1
Room 1
Design conditions
Design temperature
Indoor : 18.0°C DB
Outdoor : 10.0°C DB / 8.0°C WB
Pipe length
Main piping length : L1=10m
Branch piping length : L2=10m
Operation mode: Heating
Selection of indoor unit
A-1 Heating heat load
A-2 Indoor unit models
A-3 Rated capacity (TC )
in r
A-4 i ( )
in r
Connecting indoor unit capacity
A-5
(Cp)
Capacity at design temperature
A-6
(TC )
in d
Total capacity at design
A-7
m ( )
in d
Calculate the Maximum capacity of outdoor unit
B-1 Outdoor unit model
B-2 Rated capacity (TC )
out r
B-3 Capacity change rate by temperature conditions
B-4 Capacity change rate by indoor units connecting capacity
B-5 m n i n i n
B-6 Capacity change rate by frosting
B-7 Maximum capacity of outdoor unit (TC
Decide system capacity
C-1 System capacity
Calculate actual capacity of each indoor unit
Actual capacity of each indoor
unit
Actual capacity of all indoor units is larger than heating heat load of each room.
(When the connecting capacity for indoor unit is 100% or more)
Main Piping length, L1=10m
Branch
box
Indoor unit 2 Indoor unit 3
Room 2 Room 3
Room 1 Room 2
kW 2.0 2.0
AS07 AS07
kW 2.37 2.37
kW
kW 2.57 2.57
kW
i n
)
out c
Room 1 Room 2 Room 3
kW 2.38 2.38 2.38
- (02 - 09) -
Branch
box
Indoor unit 4 Indoor unit 5 Indoor unit 6
Room 4 Room 5
Room 3 Room 4 Room 5
2.0 2.0 2.0
AS07 AS07 AS07
2.37 2.37 2.37
2.37 x 8 = 19.0
19.0 / 16.0 = 119%
2.57 2.57 2.57
2.57 x 8 = 20.6
AO G45LBT8
kW 16.0
17.5 / 16.0 = 1.094
kW 18.2
0.996 x 0.962 = 0.958
1.00
kW 18.2 x 1.094 x 0.958 x1.00 = 19.1
kW 19.1
Room 4 Room 5 Room 6
2.38 2.38 2.38
Branch Piping length, L2=10m
Branch
box
Indoor unit 7 Indoor unit 8
Room 6 Room 7 Room 8
Room 6 Room 7 Room 8
2.0 2.0 2.0
AS07 AS07 AS07
2.37 2.37 2.37
Sum of A-3
2.57 2.57 2.57
Sum of A-6
Remark
Heating
See Fig.3
See Fig.4
See 5-1.
See 5-2.
(B-4) x (B-3) x (B-5) x (B-6)
Remark
Smaller one of (A-7)
and (B-7)
Room 7 Room 8
Remark
2.38 2.38
(A3) x (C1) / (A4)
2. MODEL SELECTION
Remark
Heating
See 6-2.