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14
Installation
4
EN
* 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.
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.
Outdoor heat pump unit
Water flow rate range [L/min]
Packaged model 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
Split model
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>
<Figure 4.3.5>
Water Circulation Pump Characteristics
EHSC series
External static pressure [kPa]
Flow rate [L/min]
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
* 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.
<Figure 4.3.6>
EHSD series
Flow rate [L/min]
<Figure 4.3.7>
ERSC series
Flow rate [L/min]
External static pressure [kPa]
External static pressure [kPa]
<Figure 4.3.8>
ERSD series
Flow rate [L/min]
External static pressure [kPa]
<Figure 4.3.9>
EHPX series
Flow rate [L/min]
External static pressure [kPa]
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
