Mitsubishi Electric EHSD-MEC Installation Manual page 15

4
Installation
Water Circulation Pump Characteristics
Pump speed can be selected by main remote controller setting (see <Figure 4.3.5 -
4.3.9>).
Adjust the pump speed setting so that the flow rate in the primary circuit is appropri-
ate for the outdoor unit installed (see Table 4.3.1). It may be necessary to add an
additional pump to the system depending on the length and lift of the primary circuit.
For outdoor unit model not listed in the <Table 4.3.1>, refer to Water flow rate
range in the specification table of outdoor unit Data Book. In such case, make sure
that the flow rate is greater than 7.1 L/min and less than 27.7 L/min.
<Second pump >
If a second pump is required for the installation please read the following carefully.
If a second pump is used in the system it can be positioned in 2 ways.
The position of the pump influences which terminal of the FTC the signal cable
should be wired to. If the additional pump(s) have current greater than 1A please
use appropriate relay. Pump signal cable can either be wired to TBO.1 1-2 or
CNP1 but not both.
Option 1 (Space heating/cooling only)
If the second pump is being used for the heating circuit only then the signal cable
should be wired to TBO.1 terminals 3 and 4 (OUT2). In this position the pump can
be run at a different speed to the hydrobox's in-built pump.
Option 2 (Primary circuit DHW and space heating/cooling)
If the second pump is being used in the primary circuit between the hydrobox and
the outdoor unit (Package system ONLY) then the signal cable should be wired to
TBO.1 terminals 1 and 2 (OUT1). In this position the pump speed MUST match
the speed of the hydrobox's in-built pump.
Note: Refer to 5.2 Connecting inputs/outputs.
Water Circulation Pump Characteristics
80
70
60
50
40
30
20
10
0
0 5 10 15
<Figure 4.3.5>
80
70
60
50
40
30
20
10
0
0 5 10 15
<Figure 4.3.7>
80
70
60
50
40
30
20
10
0
0 5 10 15
<Figure 4.3.9>
EHSC series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
20 25 30 35
Flow rate [L/min]
ERSC series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
20 25 30 35
Flow rate [L/min]
EHPX series
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
20 25 30 35 40
Flow rate [L/min]
Outdoor heat pump unit
Packaged model
Split model
* If the water flow rate is less than 7.1 L/min, the flow rate error 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.
80
70
60
50
40
30
20
10
0
40 0
80
70
60
50
40
30
20
10
0
0
40
* 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.
45
Water flow rate range [L/min]
PUHZ-W50 7.1-14.3
PUHZ-W85 10.0-25.8
PUHZ-W112 14.4-27.7
PUHZ-HW112 14.4-27.7
PUHZ-HW140 17.9-27.7
SUHZ-SW45 7.1-12.9
PUHZ-SW40 7.1-11.8
PUHZ-SW50 7.1-17.2
PUHZ-FRP71 11.5-22.9
PUHZ-SW75 10.2-22.9
PUHZ-SW100 14.4-27.7
PUHZ-SW120 20.1-27.7
PUHZ-SHW80 10.2-22.9
PUHZ-SHW112 14.4-27.7
PUHZ-SHW140 17.9-27.7
PUMY-P112 17.9-27.7
PUMY-P125 17.9-27.7
PUMY-P140 17.9-27.7
<Table 4.3.1>
EHSD series
5 10 15 20 25
Flow rate [L/min]
<Figure 4.3.6>
ERSD series
5 10 15 20 25
Flow rate [L/min]
<Figure 4.3.8>
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
30 35 40
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
30 35 40
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