Panasonic U-120MF2U9, Технические данные инструкция

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Design of 3WAY VRF SYSTEM
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1. Model Selection and Capacity Calculator
Select the model and calculate the capacity for each refrigerant system according to the procedure shown below.
Calculation of the indoor air-conditioning load
Calculate the maximum air-conditioning load for each room or zone.
Selection of an air conditioning system
Select the ideal air conditioning system for air conditioning of each room or zone.
Design of the control system
Design a suitable control system for the selected air conditioning system.
Preliminary selection of indoor and outdoor units
Make preliminary selections that are within the allowable range for the system .
........
2 -5 ~ 2 -11
Check of the tubing length and elevation difference
Check that the length of refrigerant tubing and the elevation difference are within the allowable
ranges.......................................................................................................................................
2 -5
Calculation of the corrected outdoor unit capacity
Capacity correction coefficient for model................................................................................ 2 -12
Capacity correction coefficient for outdoor temperature conditions..................................
2
-12, 14
Capacity correction coefficient for tubing length and elevation difference........................ 2 -12, 15
Heating capacity correction coefficient for frosting/defrosting..........................................
2
-12, 14
Calculation of the corrected capacity for each indoor unit
Capacity correction coefficient for indoor temperature conditions.................................... 2 -13, 15
Capacity distribution ratio based on the tubing length and elevation difference............... 2 -13, 15
2 -9, 10
Recheck of the actual capacity for each indoor unit
If the capacity is inadequate, reexamine the unit combinations .
Example 1: Increasing the indoor unit capacity...................................................................... 2 -17
Example 2: Increasing the outdoor unit capacity.................................................................... 2 -17
Design of tubing
Create a tubing design which minimizes the amount of additional refrigerant charge as much as
possible...........................................................................................................................
2 -5 ~ 2 -8
2 -5 ~ 2 -9
If tubing extension for additional unit is expected in the future, create the tubing design with
adequate consideration for this extension.......................................................................
Select the tubing size for the main tube (LA) up to the 1st distribution joint based on the rated
cooling capacity of the outdoor unit. Select tubing sizes after the distribution point based on the
total rated cooling capacity of the connected indoor units.
Increasing the tubing size of the wide tubes can reduce the loss of capacity caused by longer
tubing lengths. (Only the main wide tube with the largest tube diameter (main tube LA and main
tubes after the distribution point that are the same size as LA) can be changed.) In this case, it is
necessary to recalculate the actual indoor unit capacities.....................................................
2 -16
Calculation of additional refrigerant charge amount
Calculate the additional refrigerant charge from the diameters and lengths of the refrigerant tub-
ing. Even if the wide tubing diameter was increased, determine the additional refrigerant charge
based only on the narrow tubing size.................................................................................
Check the minimum indoor capacity (limit density) with respect to the amount of refrigerant. If th
limit density is exceeded, be sure to install ventilation equipment or take other corrective steps.
2 -11
Design of electrical wiring capacity
Select a wiring capacity according to the method of power supply........................................ 2 -21
1-2. Procedure for Selecting Models and Calculating Capacity
Model Selection Procedure
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Design of 3WAY VRF SYSTEM
1. Model Selecting and Capacity Calculator
LO
LA
LF
LM
LB
LC
L2
L4
LG
3 L
LD
LH
H2
H3
H1
L1
2
1
6 5
A
B
C
50 51 52
1-3. Tubing Length
Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown in the figure below.
NOTE
* Be sure to use special R410A distribution joints (CZ: optional parts) for outdoor unit connections and tubing branches.
Table 1 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
unit: ft. (m)
Item Mark Contents Length
Allowable tubing
length
L1 Max. tubing length
Actual length
656 (200)* 2
Equivalent length
689 (210)* 2
L (L2 – L4)
Difference between max. length and min.
length from the 1st distribution joint
164 (50)* 5
LM
Max. length of main tubing (at maximum size)
* Even after 1st distribution joint, LM is allowed if at
maximum tubing length.
*
3
1, 2~ 52 Max. length of each distribution tube
164 (50)* 6
L1 + 1 + 2~ 51 + A
+ B + LF + LG + LH
Total max. tubing length including length of each distribution
tube (only liquid tubing)
1640 (500)
A, B + LO, C + LO
Maximum tubing length from outdoor’s 1st distribution
joint to each outdoor unit
33 (10)
1-2, 2-2~ 52-2 Max. length between solenoid valve kit and indoor unit
98 (30)
Allowable elevation
difference
H1
When outdoor unit is installed higher than indoor unit
164 (50)
When outdoor unit is installed lower than indoor unit
131 (40)
H2 Max. difference between indoor units
49 (15)
H3 Max. difference between outdoor units
13 (4)
Allowable length of
joint tubing
L3
T-joint tubing (field-supply); Max. tubing length between the
first T-joint and solidly welded-shut end point
6.6 (2)
L = Length
H = Height
NOTE
1: The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are connected to the tube ends.
*
2: If the longest tubing length (L1) exceeds 295 ft. (90m) (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for the suction
tubes, discharge tubes and liquid tubes. Use a field supply reducer. Select the tube size from the table of main tubing size (Table 2) and from
the table of refrigerant tubing size (Table 8).
*
3: If the longest main tubing length (LM) exceeds 164 ft. (50m), increase the main tubing size at the portion before 164 ft. (50m) by 1 rank for the
suction tubes and discharge tubes. Use a field supply reducer.
For the portion that exceeds 164 ft. (50m), set based on the main tubing size (LA) listed in Table 2.
4: When increasing the sizes of the main tubes (LM), it is not necessary to increase the rank for the discharge tubes of the outdoor unit 18, 20
and 22 ton.
1.
Main tubing length (maximum tubing size) LM = LA + LB …
2.
Main distribution tubes LC – LH are selected according to the capacity after the distribution joint.
3. The outdoor connection main tubing (LO portion) is determined by the total capacity of the outdoor units that are
connected to the tube ends.
4.
Sizes of indoor unit connection tubing 1 – 52 are determined by the connection tubing sizes on the indoor units.
R410A optional distribution joint
CZ-P900PH1U (for outdoor unit)
CZ-P224BH1U (for indoor unit)
CZ-P680BH1U (for indoor unit)
CZ-P1350BH1U (for indoor unit)
Balance tubing
(ø1/4" (6.35mm))
Explanation of symbols
1st distribution joint for outdoor unit
1st distribution joint (for indoor unit)
Distribution joint
(CZ: optional parts)
For
extension
For
extension
Solenoid valve kit
Max.1.3 ft (40cm)
Max.1.3 ft (40cm)
Solidly welded shut
(pinch weld)
Ball valve (field supply)
T-joint (field supply)
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TD831183-00_北米向け3WAY.indb 4 15/12/17 16:05:07