Requirement On Local Design - Mitsubishi Electric PAC-IF013B-E Installation Manual

7. Requirement on local design

• This interface is to connect Mr. Slim inverter outdoor unit of MITSUBISHI ELECTRIC to local applications. Please check the following when designing the local system.
• MITSUBISHI ELECTRIC does not take any responsibility on the local system design. Therefore, MITSUBISHI ELECTRIC does NOT take any responsibility on the failure
(including outdoor unit) caused by local AHU and system design.
• Conformity of regulations and laws must be confirmed on the system on your side.
7.1. Air flow volume
Standard air flow volume
Model capacity of outdoor unit
Maximum air volume
Minimum air volume
Make sure to keep the air flow volume within the limits of maximum and minimum below.
(1) Maximum air volume
Number of
Step mode
outdoor unit connected outdoor units
Manual 2-6
1
Auto 2-5
1
*1. 600% of selected outdoor unit's maximum standard air volume is available ONLY when 6 same capacity outdoor units are connected.
Note:
• When multiple outdoor units are connected, basically select one interlaced heat exchanger which has multiple refrigerant circuit or multiple heat exchanger placed
in parallel to the air flow. If multiple heat exchangers placed in series with the air flow have to be used, maximum 2 heat exchanger in series are acceptable.
(2) Minimum air volume
Total amount of selected outdoor unit's minimum standard air volume is allowable.
7.2. Indoor heat exchanger
(1) Indoor heat exchanger volume
Make sure to keep the HEX capacity within the following range.
If the piping length is 30m or shorter, HEX capacity can be increased as follows.
Model capacity of outdoor unit
3
Max. volume [cm ]
Pipe length
3
Min. volume [cm ]
Note: Calculate them by linear interpolation in case of other piping lengths not shown on this table.
(2) Diameter of header
With a bigger size header , the refrigerant flow velocity decreases and this disturbs the sufficient circulation of refrigerant oil. As a result, the refrigerant oil does not
flow properly and could cause a serious damege of compressor.
Use the pipe whose outside diameter is less than the value shown in the table below.
Model capacity of outdoor unit
Max. diameter of header [mm]
(3) Withstanding pressure
Design pressure of outdoor unit is 4.15 MPa. Following must be satisfied for burst pressure of connecting application.
Burst pressure : More than 12.45 MPa (3 times more than design pressure)
(4) Contamination maintenance
1. Wash the inside of heat exchanger to keep it clean. Be sure to rinse not to leave flux. Do not use chlorine detergent when washing.
2. Be sure that the amount of contamination per unit cubic content of heat transfer pipe is less than the following amount.
Example) In case of ø9.52mm
Residual water : 0.6 mg/m, Residual oil : 0.5 mg/m, Solid foreign object : 1.8 mg/m
ZRP 35 50
P – –
SHW – –
[m³/min] 12.3 18
[m³/h] 738 1080
[m³/min] 6.2 8.6
[m³/h] 372 516
Capacities of the
The same 500% of selected outdoor unit's maximum standard air volume
Different
If smaller capacity outdoor unit's rated heating capacity is under 20% of total
heating capacity, 500% of bigger capacity outdoor unit's maximum standard air
volume is allowable.
If smaller capacity outdoor unit's rated heating capacity is 20% or more of total
heating capacity, 500% of smaller capacity outdoor unit's maximum standard air
volume is allowable.
–
200% of selected outdoor unit's maximum standard air volume
– 500% of the smallest capacity outdoor unit's maximum standard air volume
– 200% of selected outdoor unit's maximum standard air volume
ZRP 35 50
P – –
SHW – –
30m - 1050 1500
20m 1350 1800
10m 1650 2100
350 500
ZRP 35 50
P – –
SHW – –
60 71 100
– – –
– 80 112
21 24 33.6
1260 1440 2016
10.5 12.2 16.3
630 732 978
Maximum air volume
60 71 100
– – –
– 80 112
1800 2130 3000
2700 3030 3900
3600 3930 4800
600 710 1000
60 71 100
– – –
– 80 112
{19
125 140 200
– – 200
140 – 230
42 48 67.2
2520 2880 4032
21.5 23.0 32.6
1290 1380 1956
*1
125 140 200
– – 200
140 – 230
3750 4200 6000
4650 5100 7800
5550 6000 9600
1250 1400 2000
125 140 200
– – 200
140 – 230
{28
250
250
–
81
4860
37.8
2268
250
250
–
7500
9300
11100
2500
250
250
–
21