Ancillary Components - Mitsubishi Electric Ecodan HUS210FTC4ST Installation Manual

Ancillary Components

21
Flow Setter Valve
A flow setter valve is provided with every packaged cylinder to give an indication of the water flow rate through the
primary pipework. Each model of Ecodan
rate must be within these limits for the system to operate correctly.
PUHZ-W50VHA-BS
PUHZ-W85VHA(2)-BS
PUHZ-HW140VHA(2)-BS
PUHZ-HW140YHA(2)-BS
* To achieve good system efficiencies higher flow rates are recommended.
The flow setter valve should be fitted to either the common flow or return field installed pipework, care should be
taken to ensure that the flow setter is installed the correct way around, there is an arrow indicating the direction of
flow embossed into the main body. The flow rate can be altered using the screw adjuster on the front of the unit
however, it is always recommended that this is done as a last resort and that flow rate is adjusted on pump speed
initially. Closing the adjuster screw too much can cause unwanted noise to occur as the water accelerates through
the restriction created by closing the valve. Flow rate should always be read from the bottom section of the float, in
some instances this can be viewed more clearly by shining a torch through the viewing window.
Pipework
In order to achieve the high flow rates required for optimum efficiency appropriate pipework sizes need to be
considered. Selection of pipework will be based upon the resistance of the heating circuit including all emitters (in
most cases higher than the hot water circuit) and Ecodan
need to be confirmed by the installer as they are specific to the system in question. Copper pipework should be
used where possible although plastic pipework is acceptable.
Example pipework diameter between Ecodan
Model
PUHZ-W50VHA-BS
PUHZ-W85VHA(2)-BS
PUHZ-HW140VHA(2)-BS
PUHZ-HW140YHA(2)-BS
Anti-Vibration Equipment
Flexible hoses are supplied with the Ecodan
system pipework .Anti-vibration mountings (i.e. Tico-pad) should be installed under the mountings of the heat pump
to prevent excessive vibration. Rubber anti-vibration fix it feet can be purchased from Mitsubishi Electric which have
the dual purpose of raising the unit from ground level (useful in snow prone locations) and reducing vibration.
has a minimum and a maximum flow rate shown in the below table, flow
®
Model Minimum Flow Rate (L/m)
package and should be installed to connect the heat pump to the
®
Maximum Flow Rate (L/m)
6.5
10
17.9
17.9
® heat exchanger. Typical pipe sizes are as follows - these
® and Mitsubishi Electric pre-plumbed cylinder
Pipework size
22mm
22mm/28mm
28mm/35mm
28mm/35mm
FTC4 Installation Manual
14.3 *
25.8 *
40 *
40 *
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