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Power Reducer SA Installation and instruction manual
Code
Name
PR-SA
Power Reducer SA
Read and keep these instructions
General description
Power Reducer SA is a completely stand-alone control device with a built-in energy meter
that provides the facility of producing hot water without ever drawing power from the grid.
Connected to a water heater / storage tank with an electric heating element rated up to 3.0
kW, the Power Reducer SA can deliver immediate savings.
The Power Reducer SA diverts surplus energy automatically (even just a few hundred Watts)
without drawing from the grid. Measuring available energy by means of the current trans-
former (CT) installed on the meter line of the grid supply, the Power Reducer SA minimizes
the power demand of the electric element in the water heater / hot water storage tank,
consequently avoiding the need to draw electricity from the grid.
Contents of the pack
1 x Power Reducer
9
1 x split core Current Transformer (CT)
9
Safety warnings
All hardware connections must be made by a person who is suitably qualified and aware of
the risks associated with installation, observing the requisite standards of safety, and with
the equipment isolated from the power supply.
The user accepts all responsibilities and risks connected with the steps of installing, con-
figuring and using products to the end of obtaining the benefits and advantages they afford.
The liability of the Astrel Group in respect of its products is regulated by the Astrel Group
General Conditions of Sale (published on the company's website www.astrelgroup.com).
Do not disassemble, open up or attempt to repair the product. Opening up a sealed compo-
nent has the effect of invalidating the warranty.
Caution
IMPORTANT: The Power Reducer can be connected only to a purely resistive load; it
cannot be used with water heaters having built-in electronic control circuit boards, but must
be connected directly to the heating element and the relative electromechanical thermostat.
Warnings for installation (fig. 3)
WARNING: Use TERMINAL 1 (connector A and B) only to connect the two wires supplying
power to a resistive load. Any other kind of connection (e.g. sharing A or B with L or N) is
likely to cause electrical damage internally, and will invalidate the manufacturer's warranty.
WARNING: install a fuse or thermal magnetic breaker rated 20A to protect the device.
WARNING: before cutting the cable, ensure that the water heater is not powered up.
WARNING: switch on the Power Reducer only with the cover closed.
4-NOKS is a brand of ASTREL GROUP
ASTREL GROUP SRL
/
Via Isonzo, 21/E
/
34070 Mossa (GO) Italy
/
www.astrelgroup.com
/
www.4-noks.com
Installation
Note: it is not necessary to configure the power of the load or any other parameter The
system is already factory-configured by the manufacturer
Fixing
1)
Position the Power Reducer in such a way that it will always be properly ventilated.
Install the device vertically (cable glands facing downwards), ensuring a clearance
of at least 7 cm, top and bottom (fig. 2).
2)
Fix the Power Reducer to the wall with Ø 6 mm masonry plugs, using the holes
indicated in fig. 2
Connections
Shut off the electricity supply to the installation site and check that the
3)
water heater / storage tank is not powered up
4)
Make the electrical connections as indicated in the installation diagram (fig. 3 rear)
5)
Refit and secure the protective cover
First power-up
6)
Switch on the Power Reducer
7)
When the device is powered-up, check that all of the indicator Leds (fig. 1) blink
for 2 seconds, and that the green Led then lights up in blink mode. NOTE: if a
sequence of 3 beeps is heard at power-up, this means that the CT is positioned
the wrong way round. Accordingly, switch off the Power Reducer and turn the CT
through 180 degrees.
Check installation
8)
Select Boost mode by pressing the button on the Power Reducer (see fig. 1)
9)
Position a current clamp as illustrated in figure 3 and check that the current
measurement matches the maximum power consumed by the resistive load
10) Press the button to return the Power Reducer to normal operating mode.
Operation
Power output supplied to the resistive load is modulated continuously by the Power Reducer
SA so as to exploit surplus energy produced by the photovoltaic system. Power boost mode
(100% output) can be forced by pressing the button or closing the auxiliary control contact
(see fig 3).
Indicator LEDs
Button
280 mm
70,5 mm
Fig. 1
Response of Leds (table 1)
Led
Status
Meaning
Power Reducer active in wrong operating mode
Permanently
(see table 2 for "Change operating mode"
alight
function)
Green
Energy monitored by the CT: the faster the
Blink
blink frequency, the greater the surplus energy
measured
Blink
Partial load
Permanently
Yellow
100% load (maximum power consumption)
alight
Off
Load off
Permanently
Boost function active
alight
At power-up only: 3 blinks + 3 beeps, when the
device is switched on, indicate that the CT is the
Red
Blink
wrong way round. Check that the CT wires are
connected as in the installation diagram (see
fig 3)
Off
Power modulation active
1
Ø 6 mm fixing holes
Clearance
7 cm minimum
1
2
3
4
14 cm
Clearance
7 cm minimum
Fig. 2
Operation of button (table 2)
Function
Command
Meaning
Activation of Boost function. In this condition, the
Boost
Press briefly
connected heating element is activated at 100%
load, irrespective of the grid power available.
Power Reducer starts up in a different operating
Press and hold
Change of
mode:
(10 seconds)
operating mode
/
with Elios4you (1 beep on starting up)
during power-up
/
stand-alone (2 beeps on starting up)
Troubleshooting
1) At power-up, an acoustic warning is heard, consisting of 3 beeps:
Switch off the device and turn the direction of the CT through 180 degrees
9
2) The Power Reducer SA does not divert power to the connected heating element
Verify correct operation of the heating element and of the relative
9
electromechanical thermostat
Check the position of the current transformer (CT), which must be located at a
9
point on the phase leaving the grid meter, upstream of branches made within the
electrical system.
+05T407080R2.1 Power Reducer SA Installation Manual_IT-EN-FR-DE
Astrel Group reserves its rights to make changes or variations to its own products without any prior notice
/
15.12.2017
/
p. 3/8
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