Mitsubishi Electric Mr. SLIM PEAD-RP60JA Technical Manual page 5

1-4. Example of air volume control 1
Air volume can be selected in the following order.
■ Condition:
1. R1- R4 indicates the air outlet of each indoor unit.
2. R4 fully open at all times.
3. Air volume designed as R1: 5m
4. Rated air volume measured when R1 - R3 is fully open. (External static pressure set as 100Pa)
CN2A
Analog input
Contact input
CN105
MAC-397IF-E *
Indoor unit
Air inlet
■ Selecting air volume stage V1~V10
Depending on the damper opening pattern R1-R3, patterns
stage is selected from the fan characteristic curve. (Refer to [Fig. 1-4-3])
Choose the pattern closest to the required air volume and which the diagram exceeds.
Duct pressure drop depends on the site conditions. Shown here are temporarily numbers in case of external static
pressure 100Pa.
Air Outlet
Air Volume
[m 3 /min]
1
2
3
4
5
6
7
8
* ~ in the below diagram [Fig.1-4-3] indicates the air volume pattern
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PEAD-RP100JA(L)
(External static pressure 100Pa) 220-240V 50/60Hz
160
140
Limit
120
100
V4
V3
80
V2
60
40
20
0
10
Airflow rate(m /min)
3
3 3
/min, R2: 5m /min,
Damper System
Controller
Bypass damper
R4 R3 R2
17m /min 7m /min 5m
3 3 3
Damper System Remote controller
Field supply
[Fig.1-4-1] Example of duct system
R1 R2 R3
5 5 7
Open Open Open
Close Open Open
Open Close Open
Close Close Open
Open Open Close
Close Open Close
Open Close Close
Close Close Close
[Fig.1-4-2] Air volume pattern
V10
V9
V8
V7
V6
V5
V1
15 20 25 30 35
8 6 7 4 5 2 3 1
[Fig.1-4-3] Duct damper open/close
3
R3: 7m /min, R4:17m
Damper
R1
Air outlet
/min 5m /min
3
~ as in the below chart is available. The air volume
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Total Air volume
R4 [m 3 /min]
17 34
Open 34
Open 29
Open 29
Open 24
Open 27
Open 22
Open 22
Open 17
1
Limit
40 45
4
3
/min.
Selected
Stage
-
V10
V9
V9
V7
V8
V7
V7
V5
~ shown in this chart [Fig. 1-4-2]
8