20
Ancillary Components
Flow Setter Valve
A flow setter valve is pre-plumbed onto every slimline cylinder to give an indication of the water flow rate through
then primary pipework. Each model of Ecodan
®
has a minimum and a maximum flow rate shown in the below
table, flow rate must be within these limits for the system to operate correctly.
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
®
heat exchanger. Typical pipe sizes are as follows
- these
Anti-Vibration Equipment
Flexible hoses are supplied with the Ecodan
®
package and should be installed to connect the heat pump to the
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.
PUHZ-W50VHA-BS
6.5
14.3 *
PUHZ-W85VHA(2)-BS
10
25.8 *
PUHZ-HW140VHA(2)-BS
17.9
40 *
PUHZ-HW140YHA(2)-BS
17.9
40 *
Minimum Flow Rate (L/m)
Model
Maximum Flow Rate (L/m)
Model
Pipework size
PUHZ-W50VHA-BS
22mm
PUHZ-W85VHA(2)-BS
22mm/28mm
PUHZ-HW140VHA(2)-BS
28mm/35mm
PUHZ-HW140YHA(2)-BS
28mm/35mm
* To achieve good system efficiencies higher flow rates are recommended.
Example pipework diameter between Ecodan
®
and Mitsubishi Electric pre-plumbed cylinder
28
Pre-Plumbed Slimline Cylinder Installation Manual
Содержание Ecodan PUHZ-HW140VHA-BS
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