REMEHA Avanta Plus 28c User manual

User guide
Remeha Avanta Plus
Remeha Avanta Plus 28c
Remeha Avanta Plus 39c
Remeha Avanta Plus 24s

2
Remeha Avanta Plus
INTRODUCTION
1 SAFETY 4
1.1 General safety 4
2 BOILER 5
2.1 Operation and components 5
2.2 Controls 6
2.2.1 Advanced boiler control (‘abc®’ -control) 6
3 OPERATING THE BOILER 6
3.1 Normal start-up procedure 7
3.2 Reading operating codes and settings 7
3.3 Changing settings 8
4 PROBLEMS WITH BOILER AND/OR CENTRAL HEATING SYSTEM 12
4.1 Error codes – errors which can be resolved by the user 12
4.2 Error codes – errors which have to be remedied by theinstaller 12
4.3 Other problems 13
5 TOPPING UP, BLEEDING AND DRAINING SYSTEM 14
5.1 Topping up the central heating system 14
5.2 Bleeding the central heating system 17
5.3 Draining the central heating system 19
6 DISABLING THE BOILER 21
7 ENABLING THE BOILER 22
8 TIPS FOR MAINTAINING THE BOILER AND CENTRAL HEATING SYSTEM 23
9 ENERGY SAVINGS AND ENVIRONMENTAL PROTECTION 25
9.1 Tips on saving energy 25
9.2 Room thermostats and settings 25
10 EXPANDING THE CENTRAL HEATING SYSTEM 26
11 TECHNICAL DATA 26
12 APPENDICES 27
12.1 Remeha factory test 27
12.2 EC regulations 27

3
INTRODUCTION
The Remeha Avanta Plus range are a series of fully condens-
ing high-efficiency central heating boilers, available in the fol-
lowing types:
• Remeha Avanta Plus 28c and 39c
- with integrated domestic hot water system (combi-type)
• Remeha Avanta Plus 24s
- without integrated domestic hot water system
(system-type)
The Avanta Plus series ensures optimum domestic hot water
heating and space heating in your home.
Apart from instructions on operation / maintenance and tips
on how to achieve lower energy consumption, this User Guide
contains information on options for operating the boiler with
various types of controls, for use with conventional or under
floor heating and in conjunction with solar panels.
LT.AL.W7H.000.021
This User Guide represents the documentation for the end
user.
• Apart from the documents for the end user, the following
are provided for the installer:
• Installation and Service Manual.

• Keep this User Guide with the boiler.
• Broag Ltd. will not be liable for any damage resulting from
the instructions in this User Guide not being followed.
• Broag provides a 2-year warranty on parts for the
Remeha Avanta Plus and a 10-year warranty on the heat
exchanger. Please ensure that your installer hands over
the completed Boiler Log Book and that the warranty card
returned to Broag to register the boiler. Also ensure that
the relevant sections are completed at each service visit.
The Log Book will be required in event of any warranty
work, therefore keep it in a safe place.
We continually seek to improve our products. The data pub-
lished in this User guide is based on the most recent informa-
tion and is issued subject to later modifications. We reserve
the right to modify the construction and/or finish of our prod-
ucts at any given time without any obligation to adapt earlier
supplies accordingly.
Please do not hesitate to contact us if you have any sugges-
tions to improve this documentation.
Broag Ltd, Head Office, Molly Millars Lane, Wokingham,
Berkshire RG41 2QP, telephone: [phone], Email:
[email protected]

4
Remeha Avanta Plus
1 SAFETY
This User Guide uses specific terms and pictograms to draw
particular attention to instructions. Broag does this to enhance
the user’s safety, to prevent problems and ensure the technical
reliability of the boiler.
1.1 General safety
The following pictograms are used in this Installation and User
manual to specifically draw certain points to your attention:
Tip  Useful tip or practical advice.
Indication  Important instruction in carrying out
a particular operation.
Warning  Possible danger of personal injury
or material damage to the regulator,
building or environment.
Danger  Serious personal injury can occur
because of risk of electric shocks.
 Can you smell gas? What to do:
• Do not smoke and do not create any flame or sparks.
• Do not use any electric switches.
• Turn off the main gas stop cock.
• Open windows and doors.
• Warn those present and leave the building together.
• Call your gas suppliers / installer once you are outside the
building, TRANSCO tel. [phone].
 Can you smell smoke or flue gases? What to do:
• Switch off the boiler.
• Open windows and doors.
• Warn those present and leave the building together.
• Call your installer once you are outside the building.
 Installation location for the boiler!
• Do not store or use any flammable materials, aggressive
substance and/or aerosols near the boiler.
• The installation area must be frost-free.
• The switched spur unit for the boiler must always be
accessible.
 Water and pipe temperatures!
• The factory setting for the tap water temperature is 55°C;
this temperature can be set to 65°C.
• The maximum water temperature in the Avanta Plus can
reach 90°C. This means that pipes and/or radiators can
reach this temperature.
• If the boiler is running, the flue duct can reach a high
temperature.

5
LTALW7H000202b
1
2
3
4
5
6
7
8
9
10
11
12
14
13
Service once a year
The boiler must be inspected once a year by a qualified engi-
neer to ensure optimum, safe operation.
 Repairs
Repairs to the Avanta Plus must only be carried out by a quali-
fied engineer and in accordance with the applicable regula-
tions and (safety) requirements.
2 BOILER
2.1 Operation and components
The Avanta Plus is a high-efficiency system or combi boiler for
domestic space heating and hot water production.
The combi boiler provides space heating and contains a plate
heat exchanger, three way diverting valve and additional com-
ponents to supply instant DHW direct from the boiler on a pri-
ority basis without the need for storage
The system boiler provides space heating and can be used in
conjunction with a cylinder/calorifier and other external controls
to provide DHW indirectly
Both models have helical stainless steel heat exchanger’s c/w
a premix burner ensuring high heat transfer efficiency with
flue gases being discharged via the concentric flue system.
Condensation which forms during the combustion process is
discharged via the siphon on the underside of the boiler.
An intelligent advanced boiler control unit (‘abc®’) provides all
the necessary safety and operational safeguards using internal
and external sensors etc to ensure that the boiler operates
reliably with maximum efficiency
LT.AL.W7H.000.202
1. Automatic air vent
2. Flue/ Air inlet connection
3. Flue gas measuring point
4. Heat exchanger
5. Front plate heat exchanger
6. Air inlet tube
7. Gas combination block
8. Two channel time clock (optional)
9. Control panel
10. Pressure gauge
11. Circulation pump
12. Expansion vessel
13. Ignition/ionization electrode
14. Stand off frame (optional)

6
Remeha Avanta Plus
LTALW7H000222a
2345
1
R
LTALW7H000203a
2.2 Controls
LT.AL.W7H.000.222
The Remeha Avanta Plus is a fully modulating boiler and can
be controlled using one or more of the following methods;
1. Open Therm – 2 wire interface compatible with
the Remeha Celcia 15 room compensator and the
Remeha Celcia 20 outside weather compensator or
with any other OpenTherm control.
2. Open Therm thermostat in combination with 230 V
time clock.
3. On/Off room thermostat – volt free (Celcia 10)
4. On/Off room thermostat – 230 V
5. 230 V Switching time clock - Internal 230 V Broag
option or any other external two channel 230 V
switching clock.
2.2.1 Advanced boiler control (‘abc®’ -control)
An intelligent advanced boiler control (‘abc®’) continuously
monitors the boiler conditions and ensures a very reliable sup-
ply of heat. In the event of problems with water and air flow,
the boiler will temporarily switch off (depending on the nature
of the circumstances), and then after a short while simply try
again.
3 OPERATING THE BOILER
The control panel of the Avanta Plus has 4 function keys and a
display. The function keys are used to read or change settings
and temperatures (see par.3.3; ‘Changing settings’).
LT.AL.W7H.000.203
1 Display
2 ‘Reset’-key
3 [-] key
4 [+] key
5 ‘Enter’ key
The display has two positions and displays information on the
current operating status of the boiler and any errors.
Numbers, dots and/or letters can appear in the display. The
symbols above the function keys indicate what the function of
that particular key then is. If no key is pressed for longer than
three minutes with the “boiler in stand-by mode”, only one
dot is lit. With the “boiler operating”, two dots are displayed.
• Press any key and the current boiler status and operation
code will appear in the display.
• In the event of a fault, the fault code is displayed instead
of the dots.

7
LTNLW6H000067A
LTNLW6H000066A
LTALW7H000046b
R
LT.NL.W6H.000.066
LT.NL.W6H.000.067
3.1 Normal start-up procedure
Activate the switch on the spur unit for mains supply; the boiler
will run the start-up program.
- A display test will briefly appear showing all segments
of the display.
f[ xx software version;
p[ xx parameter version;
- A venting cycle of 2 minutes now follows, the version
numbers will be displayed alternately;
- Next, the following will appear in the display;
[1 ; boiler is ventilating;
[2 ; boiler is igniting;
[4 ; boiler is operating for DHW;
[7 ; boiler pump is running after heating DHW;
[0 ; boiler is stand-by.
3.2 Reading operating codes and settings
Reading operating codes
The display can show the following operating codes if one of
the keys is pressed.
Operating status Display shows
consecutively
Hot water tap open (DHW demand) +1 +2 +4
Hot water tap closed (DHW satisfied) +1 +7 +0
Room thermostat set higher +1 +2 +3
Room thermostat set lower +4 +1 +7
(boiler already heating up)
Room thermostat set lower +1 +6 +0
(boiler not yet heating up)
Boiler checking water
temperature 8 (once water temperature has fallen
sufficiently, it auto matically starts
running again)
Boiler waiting time 5 (boiler will start again within 3 till
10 minutes)
Boiler temporarily
non-operational 9 (automatic restart attempt after 10
minutes)
Boiler stand-by 0 (boiler running normally)
Read out settings
The following settings can be read out in the ‘user menu’:
- t1 = flow temperature [°C];
- t2 = return temperature [°C];
- t3 = boiler temperature [°C];
- t4 = outside temperature [°C];
- fl = ionisation current [uA];
- ñf = fan speed [t/min] (rpm);
LT.AL.W7H.000.046
Proceed as follows to read the settings:
• Press the [+] key, until t1 appears and, for example,
68 (68°C), the current flow temperature;
• Press the [+] key again until t2 appears and, for exam
ple, 45 (45°C), the current return temperature;
• Press the [+] key again until t3 appears and, for exam-
ple, 50 (50°C), the current boiler temperature;

8
Remeha Avanta Plus
LTNLW6H000070A
R
• Press the [+] key again until t4 appears and, for exam-
ple, 18 (18°C), the current outside temperature;
• Press [+] key again until fl appears and e.g. ^0
(6uA), the present ionisation current;
• Press [+] key again until ñf appears and e.g. 30
(3000 rpm), the present fan speed;
• Press [+] key again and the read-out cycle will start again
with t1, etc.;
• Press ‘Reset’- key to return to the display with the cur
rent operating status.
3.3 Changing settings
The user can change the following settings:
p1 Maximum flow temperature (= water temperature that
leaves the boiler) [°C], adjustable between 20 and 85°C
(factory setting = 75°C)
p2 Maximum domestic hot water temperature [°C], adjust-
able between 40 and 65°C (factory setting = 55°C)
p3 Boiler regulation; central heating and domestic hot water
mode adjustable at four levels:
0 = central heating OFF and domestic hot water OFF
1 = central heating ON and domestic hot water ON
(= factory setting)
2 = central heating ON and domestic hot water OFF
3 = central heating OFF and domestic hot water ON
p4 Eco or comfort mode adjustable at 3 levels:
0 = comfort setting
1 = eco mode
2 = regulated by controller (= factory setting)
p5 Anticipated current for on/off thermostat (ask your ser-
vice engineer for further details)
0 = no anticipated current (= factory setting)
1 = anticipated current
p6 Display off automatically
0 = display stays off
1 = display stays on
2 = display switches off automatically after 3 minutes
(= factory setting)
Changing P1 setting: flow temperature of water in central
heating system
LT.NL.W6H.000.070
Reduce the flow temperature as follows:
• Press ‘Enter’- key until codes p [ and [ 1 are dis-
played alternately.
• Press ‘Enter’- key again; set value for maximum flow
temperature is displayed: 75°C (factory setting).
• Press [+] or [-] -key to change this value, for example to
70°C.
• Press ‘Enter’- key to confirm value; codes p [ and [
1 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.
 Summer holidays
In summer a reduced flow temperature setting may be ade
quate for your heat requirement. Reduce the flow temperature
and save energy.

9
R
1x
LTNLW6H000071A
R
2x
LTNLW6H000072A
Changing P2 setting: domestic hot water temperature
LT.NL.W6H.000.071
Increase the domestic hot water temperature as follows:
• Press ‘Enter’- key until codes p [ and [ 1 are dis-
played alternately.
• Press ‘[+]- key until codes p [ and [ 2 are displayed
alternately.
• Press ‘Enter’- key; set value for domestic hot water tem-
perature is displayed: 55°C (= factory setting).
• Press [+] or [-]- key to change this value, for example to
65°C.
• Press ‘Enter’- key to confirm value; codes p [ and [
2 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.
Changing P3 setting: boiler regulation (domestic hot water
and central heating mode)
 DHW use only
If the Remeha Avanta Plus is, for example, only being used to
provide domestic hot water, switch the boiler regulation system
for the central heating system off.
0 = CH off / DHW off
1 = CH on / DHW on (factory setting)
2 = CH on / DHW off
3 = CH off / DHW on
Change the boiler regulation as follows:
LT.NL.W6H.000.072
• Press ‘Enter’- key until codes p [ and [ 1 are dis-
played alternately.
• Press [+]- key 2x until codes p [ and [ 3 are dis-
played alternately.
• Press ‘Enter’-key: central heating and domestic hot
water mode setting is displayed.
• Press [-] or [+]- key to change this mode, e.g. level 3 (=
central heating OFF and domestic hot water ON).
• Press ‘Enter’- key to confirm this mode; codes p [ and
[ 3 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.
Changing P4 setting: Eco or comfort mode
Tip: Comfort mode offers DHW on the combi boiler to be
maintained at a min temperature (the boiler will top up
the plate heat exchanger even when there is no DHW
demand) to ensure faster response. The Eco mode
disables this option therefore uses less energy.
 No hot water
Beware; the system boiler in combination with an external cal-
orifier will not warm up the calorifier in the Eco-mode.
So, if the calorifier is empty, the tap water will be cold.

10
Remeha Avanta Plus
R
3x
LTNLW6H000073A
R
4x
LTNLW6H000074A
 In the comfort mode the boiler will be seen to run
occasionally even if time clocks are in the off position.
0 = Comfort mode
1 = Eco mode
2 = regulated by controller (= factory setting)
Change the mode as follows:
LT.NL.W6H.000.073
• Press ‘Enter’- key until codes p [ and [ 1 are dis-
played alternately.
• Press [+]- key 3x until codes p [ and [ 4 are dis-
played alternately.
• Press ‘Enter’- key; setting of ‘eco or heat retention’ mode
is displayed (mode 2 = heat retention and regulator-
dependent, factory setting).
• Press [-]- key to change this mode, for example mode 1
(=eco mode).
• Press ‘Enter’- key to confirm this mode; codes p [ and
[ 4 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.
Changing P5 setting: (no) anticipated current

Boiler responds to temperature changes after a certain time,
input via on/off thermostat. Response time can be reduced by
enabling ‘Anticipated current’ option (only when the on/off ther-
mostat has an anticipation current setting device). When the
boiler is installed this setting has been already been adjusted.
Ask your service engineer for further details.
Change the anticipated current (if necessary) setting as fol-
lows:
LT.NL.W6H.000.074
• Press ‘Enter’- key for 1 second until codes p [ and [
1 are displayed alternately.
• Press [+]- key 4x until codes p [ and [ 5 are dis-
played alternately.
• Press ‘Enter’- key; (no) anticipated current setting is dis-
played (mode 0 = no anticipated current, factory setting).
• Press [-]- key to change this mode, for example mode 1
(=anticipated current).
• Press ‘Enter’- key to confirm this mode; codes p [ and
[ 5 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.

11
5x
R
LTNLW6H000075A
P6 setting: display on/off
 Display off
Operating codes on display change constantly as a result of
different operating modes. If boiler is in visible location, this
can be annoying. Display is therefore set to ‘Automatically off’.
Display goes off after 3 minutes, i.e. one or two dots remain
visible to indicate that boiler is operational (two dots) or non-
operational (one dot). You can change display to ‘Display on’
so that you can always read operating codes.
Change the display setting as follows:
LT.NL.W6H.000.075
• Press ‘Enter’- key until codes p [ and [ 1 are dis-
played alternately.
• Press [+]- key 5x until codes p [ and [ 6 are dis-
played alternately.
• Press ‘Enter’- key; you will see mode 2( = ‘Display
automatically off’, factory setting).
• Press [-]- key to change this mode to mode 1 (= ‘Dis-
play remains on’).
• Press ‘Enter’- key to confirm this mode; codes p [ and
[ 6 are displayed alternately.
• Press ‘Reset’- key to switch boiler to operating mode.
 Access code
Changing settings for which an access code is required can
only be carried out by the installer.

12
Remeha Avanta Plus
4 PROBLEMS WITH BOILER AND/OR CENTRAL HEATING SYSTEM
See par. 4.1 for problems with the boiler and/or central heat-
ing system which the user can resolve himself. See par.4.2 for
error codes which have to be remedied by the installer. Other
problems are listed in the error table in par. 4.3.
4.1 Error codes – errors which can be resolved by the
user
LT.NL.W6H.000.114 + LT.NL.W6H.000.115 + LT.NL.W6H.000.116 + LT.AL.W7H.000.235 + LT.NL.W6H.000.118
LT.AL.W7H.000.230 + LT.NL.W6H.000.121 + LT.NL.W6H.000.122
LTNLW6H000114a
LTNLW6H000116a
LTNLW6H000117a
LTNLW6H000118a
R
LTNLW6H000119a
LTNLW6H000120a
LTNLW6H000121a
R
LTNLW6H000122a
R
4.2 Error codes – errors which have to be remedied
by the installer
If the display indicates a different error code from that
described above, note down the error code and boiler type
and call your installer. Contact your installer also in the event
of a water leak.
LTNLW6H000121a
R
LTNLW6H000118a
R
R
R
LTNLW6H000118a
R
LTNLW6H000121a
R
é1 / é2
é4
Check water
pressure: water
pressure is
greater or equal
to 1 bar.
Check water
pressure: water
pressure is
greater or equal
to 1 bar.
Press R-key
Top up your
central heating
system (see par.
5.1 for details)
Wait for reco-
very; display
shows 0,
boiler functions
properly.
Press R-key
Or
Wait for
recovery; display
shows 0,
boiler functions
properly.
Wait for recovery; display shows 0,
boiler functions properly.
Display shows E1, E2, E7 or E10
again: note down the error code and
boiler type and call your installer.
Check gas
valve: gas valve
must be open, if
necessary open
valve.
Closed Opened Press R-key Wait for
recovery;
display shows
0, boiler
functions
properly.
Display shows
E4 again: note
down the error
code and boiler
type and call
your installer.
Or
Or
é7 / é10

13
4.3 Other problems
Problem or error Possible cause Solution/points to check
A. No hot water when tap is
turned on Boiler is not running Check whether the boiler is switched on
check whether a fuse has blown;
check whether the gas tap is properly open.
Water pressure is too low (less than 1
bar) Check mains cold water pressure
Economy shower head is letting too little
water through
Remove the shower head and clean; fit a new shower
head if necessary
B. Radiators are not
(properly) hot
Room thermostat is set too low Set room thermostat higher
Radiator valve is not open Open radiator valve (further)
Boiler is not running
Check whether the boiler is switched on
check whether a fuse has blown;
check whether the gas tap is properly open.
System pressure too low Top up central heating; see par.5.1
C. Boiler not working Room thermostat is set too low Set room thermostat higher
Boiler is not running
Check whether the boiler is switched on
check whether a fuse has blown;
check whether the gas tap is properly open.
System pressure is too low Top up central heating, see par. 5.1
Boiler has a fault
Reset the boiler (using the ‘Reset’ key);
remedy the fault (see par. 4.1) or
consult your installer (see par. 4.2).
Gas pressure is too low Check gas pressure at boiler and meter
D. System water pressure is
too low (less than 1 bar)
Insufficient water in central heating sys-
tem Top up central heating; see par 5.1
Water leak Consult installer
E. Major temperature
fluctuations in the DHW
Water supply insufficient Check supply pressure : Open water tap further
F. Ticking noises from
central heating pipes
Central heating pipes clipped too tightly Loosen clips;
lubricate clips with grease;
enlarge sleeves (in walls and/or floors).
G. Gurgling noises in cen-
tral heating pipes and/or
radiators
Air in central heating system Bleed central heating and top up system afterwards;
see par.5.2
H. Flow noises in
central heating pipes
Water in central heating system
flowing too quickly
Consult installer
I. Serious leak under or
near boiler
Boiler or central heating pipes
are faulty or damaged
Consult installer
 Error codes
When contacting your installer, please have details of the error
code on the display, the serial number, year of manufacture
and type of the boiler (see label on base of the boiler).

14
Remeha Avanta Plus
5 TOPPING UP, BLEEDING AND DRAINING SYSTEM
It may be necessary to bleed the central heating system or top
it up with water to ensure optimum operation of the boiler and
central heating system. If the water pressure is less than 1 bar,
the system has to be topped up with water. This section pro-
vides information on topping up, bleeding and draining.
5.1 Topping up the central heating system
Disabling the boiler
Before the central heating system can be topped up, the boiler
must be disabled. Proceed as follows:
LT.AL.W7H.000.215
4
5
3
6
LTALW7H000215a
• Open radiator valves and set the room thermostat as low
as possible.
LT.AL.W7H.000.224
LTALW7H000224a
230 V
• Switch off the boiler.
Topping up the central heating system
The Remeha Avanta Plus runs best with a water pressure of
between 1.5 and 2 bar (see the water-pressure meter at the
bottom of the boiler). If the water pressure falls below 1 bar,
the system has to be topped up with water.
 Boiler off
Ensure that the boiler is disabled.
LT.NL.PER.000.005
LTNLPER000005a
• Wait until the temperature is below 40°C (the radiators
feel cold) before topping up.

15
LT.AL.W7H.000.229
LTALW7H000229a
• When topping up, use a filling loop, a cloth and a bleed
key.
Top the Avanta Plus up as follows:
LT.AL.W7H.000.235
LTALW7H000235b
• Attach the filling loop between mains cold water inlet and
CH return.
LT.AL.W7H.000.236
LTALW7H000236b
• Turn the filling loop valve open by a quarter turn.
 Drain cock
The filling loop does not have to be near the boiler.

16
Remeha Avanta Plus
2 bar
LTALW7H000237b
LT.AL.W7H.000.237
• Turn the filling loop valve off again once the water-pres-
sure meter shows 2 bar.
• Remove the filling loop after topping up the system.
LT.AL.W7H.000.238
LTALW7H000238b
Air gets into the central heating system when topping up with
water. Bleed the central heating system as described in par.
5.2. After bleeding, the water pressure may be below the
required level again, so the system has to be topped up with
water. Topping up and bleeding twice ought to be sufficient to
reach the correct water pressure.
Consult the installer if the central heating system has to be
topped up more than three times a year.
Enabling the boiler
Once the central heating system has been topped up, enable
the boiler again, see section 7.

17
LTALW7H000210a
4
5
3
6
LTALCZ1000098a
LTALW7H000224a
230 V
LTNLPER000005a
LTALW7H000214a
3
1
4
5
2
5.2 Bleeding the central heating system
A gurgling noise in pipes and/or radiators which only partially
heat up indicate(s) air in pipes and radiators. The central heat-
ing system has to be bled.
Before bleeding, the following preparations have to be made:
LT.NL.WH7.000.210 + LT.NL.CZ1.000.098
• Open all radiator valves and set the room thermostat as
high as possible; wait until the radiators feel hot.
LT.AL.W7H.000.224 + LT.PER.000.005
• Switch off the boiler and wait approx. 10 minutes until the
radiators feel cold.
Bleed the central heating system as follows:
LT.AL.W7H.000.214
• Bleed the lowest radiator first and then work towards the
highest radiator.

18
Remeha Avanta Plus
LT.NL.PER.000.017 + LT.NL.PER.000.018
LTNLPER000017a
LTNLPER000018a
LTNLPER000019a
LTNLPER000020a
LTALW7H000211a
1,5 ... 2 bar
LTALW7H000226a
230 V
• Hold a cloth against the bleed nipple, open the nipple
with a bleed key and allow air to escape slowly.
LT.NL.PER.000.019 + LT.NL.PER.000.020
• Wait until water comes out of the bleed valve (without
spluttering) and then close the bleed nipple.
 Hot water
The water may still be hot.
LT.AL.W7H.000.211
• After bleeding, check whether the water pressure in the
central heating system is still adequate; if not, top up.
See par.5.1.
LT.AL.W7H.000.226
• Plug the boiler back in. The boiler starts up automatically.
The boiler will now run through a bleed cycle for approx.
2 minutes, after which normal operation will start. See
par. 3.2 for an explanation of the codes on the display.

19
LTALW7H000212a
LTNLPER000024A
4
5
3
6
LTNLPER000025a
LTALW7H000224a
230 V
LTNLPER000005a
LT.AL.W7H.000.212 + LT.NL.PER.000.024 + LT.NL.PER.000.025
• Set the room thermostat to the desired temperature and
close the radiator valves in those rooms which do not
have to be heated.
5.3 Draining the central heating system
Draining the central heating system may be necessary if the
radiators have to be replaced, if there is a serious leak, or if
there is a risk of freezing.
Drain the central heating system as follows:
LT.NL.CZ1.000.098 + LT.AL.W7H.000.005
• Open radiator valves and set the room thermostat as low
as possible.
LT.AL.W7H.000.224 + LT.NL.PER.000.005
4
5
3
6
LTALW7H000215a
• Switch off the boiler and wait until the radiators feel cold.

20
Remeha Avanta Plus
LTALW7H000216a
LTNLPER000027a
LTNLPER000028a
LTALW7H000227a
1
2 3
4 5
LT.AL.W7H.000.216
• Connect a drain hose to the lowest drainage valve; place
the other end of the hose in a drain or in a place where
drained system water will not cause any damage.
LT.NL.PER.000.027
• Open the drainage valve by turning it through a quarter-
turn and allow the central heating system to empty.
 Stains
Drained water can be warm and can cause stains.
LT.NL.PER.000.028
• Open the radiator valves and bleed nipples of all the
radiators, starting with the highest radiator. Carefully open
the bleed nipple. If water is still running out of it, close the
bleed nipple again and try again later.
LT.NL.PER.000.029
• Once no more water is coming out of the drainage valve,
close the drainage valve, radiator valves and bleed nip-
ples.