Checking Component Parts' Function; Water Circulation Pump (Primary Circuit); Recommended Water Flow Rate Range; Water Circulation Pump (Primary Circuit) Characteristics - Mitsubishi Electric EHST17D-VM2D Service Manual

10-6. Checking Component Parts' Function

Water circulation pump (primary circuit)

Signal cable
3
M
1~
3
Power cable
<Recommended water flow rate range>
Outdoor heat pump unit
Packaged model PUZ-WM50
PUZ-WM60
PUZ-WM85
PUZ-WM112
PUZ-HWM140
Split model SUZ-SWM40
SUZ-SWM60
SUZ-SWM80
PUD-S(H)WM60
PUD-S(H)WM80
PUD-S(H)WM100
PUD-S(H)WM120
PUD-SHWM140
PUHZ-FRP71
PUHZ-SW75
PUHZ-SW100
PUHZ-SW120
PUHZ-SHW80
PUHZ-SHW112
PUHZ-SHW140
PUMY-P112
PUMY-P125
PUMY-P140
<Table 10.6.1>
Note: For installation of E*PT series, set its pump speed with a pressure drop
between the cylinder unit and the outdoor unit factored into the external
static pressure.
Water circulation pump
(sanitary circuit)
Immersion heater
Flow sensor
CN1A WH
BK
WH
Vout
BU
BN
4-3 : 5 V (DC)
2-3 : Output Vout (DC)
OCH714A
Part Name
BROWN
PWM input signal
BLUE
Signal ref.
BLACK
Feedback signal
BROWN
L
BLUE
N
GREEN/
YELLOW
Water flow rate range [L/min]
6.5 to 14.3
8.6 to 17.2
10.8 to 24.4
14.4 to 32.1
17.9 to 40.1
6.5 to 11.4
7.2 to 17.2
7.8 to 21.5
9.0 to 22.9
9.0 to 22.9
14.3 to 34.4
14.3 to 34.4
14.3 to 34.4
11.5 to 22.9
10.2 to 22.9
14.4 to 32.1
20.1 to 36.9
10.2 to 22.9
14.4 to 32.1
17.9 to 36.9
17.9 to 35.8
17.9 to 35.8
17.9 to 35.8
L N
M
1~
FTC CONTROLLER BOARD
1
WITHOUT SIGNAL
2
MICRO
PROCESSOR
3
5 V DC
4
<Water circulation pump (primary circuit) characteristics>
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
Measure the resistance between the terminals with a tester.
(Winding temperate 20°C)
Terminal
L-N
DHW circulation pump MUST be set to speed 2.
Measure the resistance between the terminals with a tester.
(Winding temperate 20°C)
Terminal
A-B
To reset the immersion heater use a pin or similar to press the reset button lo-
cated on the top of the immersion boss.
See diagram on the left.
Flow signal
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.35V
0.0
0 20
61
Checkpoints
E*ST30D series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0
Flow rate [L/min]
<Figure 10.6.1>
E*ST20/30C series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0
Flow rate [L/min]
<Figure 10.6.2>
E*ST17/20D series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0
Flow rate [L/min]
<Figure 10.6.3>
Normal (speed 2) Abnormal
211 Ω Open or Short
Normal Abnormal
19.2 Ω Open or Short
40 60 80 100
Flow [L/min]
35.0 40.0
35.0 40.0
35.0 40.0