Checking Component Parts' Function; Recommended Water Flow Rate Range - Mitsubishi Electric EHSC-VM2B Service Manual

10-6. Checking Component Parts' Function

Part Name
Signal cable
3
M
1~
3
Power cable
GREEN/
YELLOW
<Recommended water fl ow rate range>
Outdoor heat pump unit
Packaged PUHZ-W50
PUHZ-W85
PUHZ-HW112
PUHZ-HW140
Split PUHZ-RP35
PUHZ-RP50
PUHZ-RP60
PUHZ-(H)RP71
PUHZ-(H)RP100
PUHZ-(H)RP125
PUHZ-RP140
PUHZ-SW40
PUHZ-SW50
PUHZ-SW75
PUHZ-SW100
PUHZ-SW120
PUHZ-SHW80
PUHZ-SHW112
PUHZ-SHW140
* If the water fl ow rate is less than 7.1 L/min, the fl ow switch will be
activated.
If the water flow rate exceeds 27.7 L/min, the flow speed will be
greater than 1.5 m/s, which could erode the pipes.
OCH532A
BROWN
PWM input signal
BLUE
Signal ref.
BLACK
Feedback signal
BROWN
L
BLUE
N
Water fl ow rate range [L/min]
7.1 - 14.3
10.0 - 25.8
14.4 - 27.7
17.9 - 27.7
7.1 - 11.8
7.1 - 17.2
8.6 - 20.1
10.2 - 22.9
14.4 - 27.7
17.9 - 27.7
20.1 - 27.7
7.1 - 11.8
7.1 - 17.2
10.2 - 22.9
14.4 - 27.7
20.1 - 27.7
10.2 - 22.9
14.4 - 27.7
17.9 - 27.7
<Water Circulation Pump Characteristics>
EHSC, ERSC series
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
Flow rate [L/min]
EHPX series * (with PUHZ-W50)
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
Flow rate [L/min]
EHPX series * (with PUHZ-W85)
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
EHPX series * (with PUHZ-HW112/140)
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
Flow rate [L/min]
* For installation of EHPX series, set its pump speed with a pressure drop between the
hydrobox and the outdoor unit factored into the external static pressure.
63
Check Points
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0 40.0
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0 40.0
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0 40.0
Flow rate [L/min]
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0 40.0