Alpha Eco User Instructions

User's

Instructions

Eco

Wall Mounted, Fan Assisted, Room Sealed,

Gas Fired, High Efficiency Condensing Combination Boiler

Nepicar House, London Road,

Wrotham Heath, Sevenoaks,

Kent TN15 7RS

For Technical help or for Service call ...

ALPHA HELPLINE Tel: [phone]

website: www.alpha-innovation.co.uk

Alpha Eco G.C. No. 47 532 59

For use with Natural Gas only

Leave these instructions with the User

0051

2

Eco

The Eco high efficiency condensing boiler incorporates the latest technology in boiler design. With improved burner efficiency
and reduced electrical consumption together with high quality and reliability.

The boiler output will automatically adjust according to the requirements of the system.

The Eco is designed to work with most central heating controls however we recommend the Alpha Comfort standard controls
or the enhanced Alpha Climatic boiler energy manager further improving the system efficiency by varying the system
temperature depending on the room temperature and heat losses.

In addition the Eco features optional connections for an outside sensor to enable the boilers built in weather compensation
feature.

The boilers will provide central heating when required during the on times as set according to the controls fitted. Hot water
will always take priority over the central heating whenever a hot tap is opened.

Fig. 1

2 OPERATING THE BOILER

1 INTRODUCTION

Make sure the heating system is filled and the needle on the pressure gauge (item 7 in Fig. 1) is in the green band. If
incorrect refer to Section 5.

Switch the boiler on at the mains supply socket switch. The boiler will automatically go through a system purging operation
for 8 minutes; this is indicated by a count down on the display starting from 96. During this operation the pump will turn on
and off to help remove any air that may be trapped in the heating system. If the boiler has already been commissioned by the
installer then this operation can be terminated by pressing the reset button (item 3 in Fig. 1).

Note: It is important to allow this purging operation to function when the boiler has been initially installed to remove all the air
from the system.

After this purging operation the boiler will be in 'Standby' or 'On' mode.

By pressing the On-Off button (item 1 in Fig. 1) the Standby or On mode can be selected, or press and hold the On-Off
button for eight seconds to turn the boiler off.

Standby - In this mode the boiler will not provide hot water or central heating, but frost protection and pump circulation
features are still active.

Off - In this mode there is electrical power to the boiler but the boiler will not function in any condition.

The boiler controls are located on the control panel.

Please read these instructions carefully before operating your boiler.

1 On-Off/Standby button
2 Summer/Winter button
3 Reset button
4 Information button
5 Domestic hot water temperature

selector switch

6 Central heating water temperature

selector switch
7 Heating system pressure gauge
8 DHW mode active

9 Boiler locked does not require reset via

“RESET” button

10 Flame present symbol and relative

power scale
11 Operating in summer mode
12 Operating in winter mode
13 Central heating mode active
14 Temperature indicator, boiler info and

error codes
15 Boiler in Stand-by mode

16 Presence of external connected devices
17 Solar function active
18 Functioning with external temperature

probe active (optional)

19 Boiler connected to remote control

(optional)
20 Not used on this model
21 Optional boiler controls (if fitted)

RESET

BOOST

bar

°C

x100rpm

RESET

INFO

bar

0

4

3

2

2.5

3.5

1.5

0.5

1

CORRECT PRESSURE

WHEN COLD

12

3

4

5 6

721

RESET

BOOST

bar

°C

x100rpm

8 9 10

11 12

13

14

151617181920

Eco

3

Eco

The temperature of the hot water to the taps can be adjusted by turning the hot water selector switch (item 5 in Fig. 1) to the
required value shown on the display in °C.

When a tap is opened the display will indicate the temperature of water in the boiler heating the tap water and not the actual
water temperature to the tap.

The temperature of the central heating water can be adjusted by turning the central heating selector switch (item 6 in Fig. 1).
When the heating is on the temperature of the water leaving the boiler to the radiators will be displayed.

If an external weather compensation probe is fitted, indicated by the

symbol (item 18 in Fig. 1) in the display, it will
automatically vary the temperature of the water in the radiators and on mild day the radiators will not feel as hot as on a cold
day, this is normal and not a fault with the boiler or heating circuit. The room temperature will still be maintained as set by the
room thermostat.

When an external weather probe is fitted, the central heating selector switch (item 6 in Fig. 1) will no longer adjust the flow
temperature in °C, instead the display will show a scale of 1 to 9. Each number corresponds to a line on the graph in Fig 2
i.e. line 6 will give a flow temperature of 60°C when the external temperature is 10°C.

Note: This is the temperature of the water supplied to the radiators and not the desired room temperature. The time and
temperature will still be maintained according to the setting of the room thermostat.

3 HEATING AND HOT WATER TEMPERATURE

On - In this mode the boiler can be switched between 'Summer' or 'Winter' settings by pressing the Summer/Winter button

(item 2 in Fig. 1).

Summer setting - The boiler will only provide hot water when a tap is turned on and the central heating will not activate even
if requested by external controls (frost protection and pump cycle are still active).

Winter setting - The boiler will operate in both heating and hot water. The heating will activate depending on the time and
temperature from any heating controls fitted. Hot water will always take priority over heating when a hot outlet tap is opened.

Fig. 2 - External weather compensation probe fitted

Flow temperature (°C)

External temperature (°C)

27 15

5

-510 0 -10 -1520

25 (25)

60 (40)

85 (50)

Flow temperature in brackets
ie. 25 to 50°C range when boiler
is used with a low temperature
system such as under floor heating

Setting 1 to 9 as selected using
the central heating selector switch

9 8

7

6

5
4

3

2

1

0

4 FILL AND PRESSURISE THE SYSTEM

Your boiler should have a filling loop fitted by the installer located in the pipework below the boiler.

Do not attempt to fill or pressurise the system while the system is hot - wait for it to cool.

The filling loop on the underside or underneath the boiler will have two tap connections at either end of the filling loop.

These taps should normally be in the closed position 90° to the tap housing.

To fill or pressurise the system open one tap fully by turning it 90° anticlockwise in line with the tap housing. The second tap
should be opened a quarter of a turn and the water will start to refill the system (water should be heard filling the system).
You should see the pressure gauge (item 7 in Fig. 1) rise back up into the green area on the pressure gauge between 1 bar
and 1.5 bar pressure.

Once the pressure gauge is in the green area turn the taps back to the off position and the water will stop filling the system.

If you happen to fill the system too much and the pressure gauge is over the green area, just bleed water from a radiator until
the pressure on the gauge goes down into the green area.