REMEHA GAS 210-80 ECO PRO Manual

114494-190310
High efficiency Low Nox gas boiler
Types:
210-80
210-120
210-160
210-200
EN
English
Technical
information
GAS 210 ECO PRO

GAS 210 ECO PRO
2
114494-190310
Preface 6
1. EC declaration 7
2. Introduction 8
2.1 Pictograms used 8
2.2 Important instructions 8
3. Safety 9
4. Installation 10
4.1 Scope of delivery and installation 10
4.2 Dimensions 11
4.3 Installation and service clearances 12
5. Water-side connections 13
5.1.1 Condensed water discharge 13
5.1.2 Water treatment 13
5.1.3 Pressure relief valve 14
5.1.4 Circulation pump 14
5.1.5 Water flow 14
6. Gas-side connections 15
6.1 Gas connection 15
6.2 Gas pressure 15
6.3 Gas/air ratio control 15
7. Connecting the flue gas discharge and air supply 16
7.1 General 16
7.2 Conventional open flue installation 16
7.2.1 Possible lengths for the flue gas discharge pipe 17
7.3 Room sealed installation 18
7.3.1 Possible lengths for the air supply and flue gas discharge 18
7.3.2 Discharge in different pressure areas 20
7.3.3 Connection of flue gas discharge and choice of material 21
7.3.4 Air supply connection and choice of material 21
8. Control and electrical connections 22
8.1 General 22
8.1.1 Boiler control 22
8.1.2 Modulating controls general 22
8.1.3 Modulating room control 22
8.1.4 Modulating weather-compensated control rematic® 22
8.1.5 Modulating cascade controller MC4 23
8.2 Electrical specifications 23
8.2.1 Mains voltage 23
8.2.2 Control box 23
8.2.3 Fuse ratings 24
8.3 Electrical connection options 24
8.3.1 Connection options of standard control unit (PCU-01) 24
8.3.2 On/off control (OT) 24
8.3.3 Modulating controls (OT) 24
8.3.4 External interlock (BL) 24
8.3.5 Input release (RL) 25
8.3.6 Circulation pump (Pump) 25
8.3.7Connecting a PC 25
8.3.8 Connection options for the PCB - SCU - X01 25
Table of contents
Table of contents

114494-190310
GAS 210 ECO PRO
3
8.4 Connection options for the optional 0 - 10 V control PCB (IF-01) 26
8.4.1 Connection status (Nc) 26
8.4.2 OTm connection 26
8.4.3 Analogue input (0 - 10 V) 27
8.4.4 Analogue output (0 - 10 V) 27
8.5 Connection options of the optional expanded control/protection PCB (SCU-S01) 28
8.5.1 Flue gas damper control (FgV) 28
8.5.2 Hydraulic valve control (HdV) 28
8.5.3 External gas valve control (EgV) 28
8.5.4 Operation signal and failure signal (Nc / No) 28
8.5.5 Water pressure sensor (Wps) 28
8.5.6 Outside temperature sensor (Tout) 29
8.5.7 Minimum gas pressure switch (Gps) 29
8.5.8 Gas leakage control (VPS; only for 210- 160 and 210- 200 boilers) 29
8.5.9 Wiring diagram 30
9 Commissioning 31
9.1 Control panel 31
9.1.1 Normal start-up procedure 31
9.1.2 Fault during start-up procedure 32
9.1.3 Reading current values 33
9.1.3.1 Status and sub status 34
9.1.4 Adjusting the boiler to the system 34
9.1.5 Changing parameters at user level (without access code) 35
9.1.6 Changing parameters at service level (with access code) 35
9.1.7 Resetting factory settings 38
9.1.8 Setting manual operation  (˜ symbol) 39
9.2 Commissioning 39
9.3 Taking the boiler out of operation 42
9.3.1 Boiler with frost protection, out of operation for a long time 42
9.3.2 Boiler without frost protection, out of operation for a long time 42
10. Inspection and maintenance 43
10.1 General 43
10.2 Combustion check of the boiler 43
10.2.1 Corrective maintenance 43
10.2.2 Cleaning the fan 44
10.2.3 Cleaning the heat exchanger (flue gas side) 46
10.2.4 Cleaning the burner 47
10.3 Cleaning the trap 48
10.4 Checking the ignition electrode 48
10.5 Checking for leaks 48
10.6 Checking water pressure 48
10.7 Putting boiler back into operation 48
11. Control stops and faults 49
1 1.1 General 49
11.2 Control stops and faults 49
11.3 Control stop codes 49
11.4 Fault codes 51
11.5 Control stop - and fault memory 54
1 1.5.1 Reading faults 55
11.5.2 Deleting control stops or faults 55
Table of contents

GAS 210 ECO PRO
4
114494-190310
Table of contents
12. Service parts 56
12.1 General 56
12.2 Exploded view 57
13. Regulations 58
13.1 General 58
13.2 Standards 58
13.3 Remeha factory test 58
13.4 Supplementary guidelines 59
14. Technical specifications 60
14.1 Technical data 60
15. Efficiency data and gas inspection labels 61
15.1 Unit usable efficiency (HR efficiency) 61
15.2 Water-side efficiency 61
15.3 Zero-load losses 61
15.4 Description of specifications 61
15.5 Accessories 62
15.6 Services 62
15.7 Type of unit 63
15.8 Operating principle 64
15.9 Boiler Control 64
15.9.1 Temperature control 64
15.9.2 Low water level protection 64
15.9.3 Maximum protection 65
15.9.4 Frost protection 65
16. Application data 66
16.1 General 66
16.2 Air and flue gas application options 66
16.3 Hydraulic application options 66
16.4 Cascade application 66
16.5 Control options 69
16.6 Gas application options 69
17. Checklists (records) 70
17.1 Checklist for commissioning (Commissioning record) 70
17.2 Checklist for annual inspection (inspection record) 70
17.3 Checklist for maintenance (maintenance record) 71

114494-190310
GAS 210 ECO PRO
5
Table of contents

GAS 210 ECO PRO
6
114494-190310
Preface
Preface
PREFACE
This technical information , which contains a lot of practical infor-
mation about the Remeha Gas 210 ECO PRO, a High efficiency
central heating unit, is mainly intended for installers. It contains
important instructions for safe and trouble-free operation of the
boiler before commissioning and during operation.
Read these instructions carefully before putting the boiler into
operation, familiarise yourself with its control functions, operation
and strictly observe the instructions given. Failure to do so may
invalidate warranty or prevent the boiler from operating. The boiler
is available in the following types:
- Gas 210 ECO PRO 80 (3 sections; 87 kW)
- Gas 210 ECO PRO 120 (4 sections; 120 kW)
- Gas 210 ECO PRO 160 (5 sections; 166 kW)
- Gas 210 ECO PRO 200 (6 sections; 200 kW)
The installation, commissioning, inspection and servicing of the
boiler must be carried out by a competent Corgi registered engi-
neer who holds valid A.C.S. certification and in accordance with
current gas safety (installation and use) regulations, the building
regulations and all other relevant codes of practice.
All electrical work must be carried out by a competent engineer
and to be installed in accordance with the current IEE regulations.
If you have any questions, require an engineer to call on site, or if
you need more information about specific subjects relating to this
boiler, or it's installation please do not hesitate to contact our tech-
nical help line 0118 978 3434.

When contacting Broag with a problem on the boiler , please have
available the boiler type, Serial No (located on the bottom of the
casing), and the symptoms or fault code (the fault code is a series
of flashing digits in the display panel).
The data published in these technical instructions is based on the
latest information (at date of publication) and may be subject to
revisions.
We reserve the right to continuous development in both design
and manufacture, therefore any changes to the materials or tech-
nology employed may not be retrospective nor may we be obliged
to adjust earlier supplies accordingly.

114494-190310
GAS 210 ECO PRO
7
1. EC declaration
1. EC declaration
EC - DECLARATION OF CONFORMITY
Manufacturer : Remeha B.V.
Address : Kanaal Zuid 110
City, Country : Postbus 32, NL-7300 AA Apeldoorn, Holland
- this is to declare that the following product(s) : Remeha Gas 210 ECO PRO
is/are in conformity with the following EEC-directives:
EEC- Directive: 90/396/EEC tested and examined to the following norms:
EN 656 A1(2006), EN 15417(2006)
15240
(2006)
92/42/EEC
73/23/EEC DIN EN 50165(2001), EN 50165(1997 + A1: 2001)
DIN EN 60335-1(2003), EN 60335-1(2002) 07
89/336/EEC EN 55014-1(2000+A1:2001), 55014-2(1997+A1:2001)
EN 61000-3-2(2000+A2:2005), 61000-3-3(1995+A1:2001)
97/23/EEC (article 3, sub 3)
Apeldoorn, aug. 2007
W.F. Tijhuis
Approval manager

GAS 210 ECO PRO
8
114494-190310
2. Introduction
2. Introduction
The following pictograms are used in this document to emphasise
certain instructions. This is in order to increase your personal
safety and to safeguard the technical reliability of the boiler . The
pictograms used are:
 Useful advice.
 Important instruction for carrying out an action.
 Possible risk of bodily injury or material damage to boiler ,
building or environment.
 Possible risk of electrical shocks. Serious bodily injury may
occur .
2.1 Pictograms used
2.2 Important instructions
The boiler must be installed in a frost-free area.

Work on the boiler
Installation, commissioning, maintenance and repair work may
only be carried out by suitably qualified specialist installers in
accordance with the applicable national and local standards and
guidelines.Always disconnect the mains supply and close the main
gas cock when working on the boiler. Check the entire system for
leaks after maintenance and servicing work.
Casing panels may only be removed for maintenance and servic-
ing purposes. Refit all panels on completion of maintenance and
servicing work.
Instruction and warning labels on the boiler must never be
removed or covered and must be clearly legible throughout the
entire service life of the boiler. Replace damaged or illegible
instruction and warning labels immediately. Generally applicable
safety instructions related to accident prevention must be con-
sulted in addition to the information supplied in this technical docu-
mentation.
Boiler modifications
Modifications to the boiler require the written approval of Broag.

Keep this document near to the installation.

114494-190310
GAS 210 ECO PRO
9
3. Safety
3. Safety
Adhere strictly to the specific safety instructions.

Can you smell gas? Proceed as follows:
• do not smoke and avoid fire and sparks
• do not operate electrical switches.
• close the gas cock.
• open doors and windows.
• trace possible leaks and seal them of f.
• if the leak is upstream of the gas meter , notify National Gas
Emergency Service tel: [phone].

Can you smell flue or combustion gases? Proceed as follows:
• isolate the mains power supply from the boiler.
• open doors and windows.
• trace possible leaks and seal them of f.

GAS 210 ECO PRO
10
114494-190310
4. Installation
4. Installation
The boiler is supplied fully assembled and protected. The boiler
is placed on a pallet (70 x 130 cm, 145 cm high), which can be
transported with a pallet truck, hand truck, forklift truck or 4-wheel
transport boards. The packaging passes through all standard
doors (minimum width of 74.5 cm).
The boiler is installed as follows:
- Position the pallet with the boiler in the boiler room;
- Remove the fixing bands and all other packaging (some
components are packaged in the polystyrene cap);
- Lift the boiler from the pallet;
- Slide the boiler into the required position, using the recessed
handles in the boiler base;
- Cover the boiler and do not operate it whilst dust creating
construction processes or insulation to the pipe work etc. are
carried out in the plant room.
4.1 Scope of delivery and installation

114494-190310
GAS 210 ECO PRO
11
4. Installation
1200
A
1272
152
316
1070 125
450
1190
305160 140140 121
61
61
114492LTAL21H001b
fig. 01 Elevation drawings
4.2 Dimensions
Connection Gas 210 ECO PRO 80/120/160 Gas 210 ECO PRO 200
É Flow 1¼” male thread 1½” male thread (fit supplied adapter 1¼” > 1½”)
Ê Return 1¼” male thread 1½” male thread (fit supplied adapter 1¼” > 1½”)
 Gas connection 1¼” male thread 1¼” male thread
Ò Condensate drain Ø 32 mm external Ø 32 mm external
Ð Combustion air supply Ø 150 mm Ø 150 mm
Ñ Flue gas outlet Ø 150 mm Ø 150 mm
Dimension “A” 1309 mm 1324 mm
Ì Second return (option) 1¼” male thread 1¼” male thread

GAS 210 ECO PRO
12
114494-190310
4. Installation
4.3 Installation and service clearances
Clearance of at least 60 cm is required at the front of the boiler .
However, we recommend a clearance of 1 m. W e recommend a
clearance of at least 40 cm above the boiler control panel, at least
5 cm on the left side and at least 25 cm on the right side in con-
nection with condensed water discharge. Install a gas cock in the
immediate vicinity of/above the boiler.
1050
450600
1490
250119050
1690
4501190
1890
2501190450
50
1690
1190
2100
600450 450600
250 250
1050
450600
2930
250119050 2501190
1
114492LTAL21H002a
2
3 4
fig. 02 Boiler room installation options

114494-190310
GAS 210 ECO PRO
13
5. Water-side connections
5. Water-side connections
5.1.1 Condensed water discharge
Discharge the condensed water directly into a foul water drain. In
view of the acidity level of condensate (pH between 3 and 5), only
use plastic material for the discharge pipe. After assembly, fill the
trap with clean water. Make an open connection with the drain. The
discharge pipe must slope down by at least 30 mm/m. Condensed
water must not be discharged into gutters or rain water down pipes.
5.1.2 Water treatment
• Use untreated tap water only to fill the CH system.
• The pH value of the system water must be between 7 and 9.
• Where inhibitors are being used, please refer to Broag recom-
mendations in this section and follow the manufactures instructi-
ons given.
If used correctly water treatment can improve the boilers ef ficiency
and increase the anticipated life expectancy of the boiler .

For further information a special document “Remeha water quality
regulations” is available from Broag. The regulations mentioned in
this document must be followed.
As most systems contain a variety of metals, it is considered good
practice to provide some form of water treatment in order to pre-
vent or reduce the following:
• Metallic corrosion
• Formation of scale and sludge
• Microbiological contamination
• Chemical changes in the untreated system water

All scale deposits, however small, will reduce the ef ficiency of the
boiler and should be prevented.
Suitable chemicals and their use should be discussed with a spe-
cialist water treatment company prior to carrying out any work
(environmental aspects, health aspects). The specification of the
system and manufacturers recommendations must be taken into
account, along with the age and condition of the system. New sys-
tems should be flushed thoroughly to BS 7593(1992) to remove
all traces of flux, debris, grease and metal swarf generated dur-
ing installation. Care to be taken with old systems to ensure any
black metallic iron oxide sludge and other corrosive residues are
removed, again by power flushing, ensuring that the system is
drained completely from all low points.

Please ensure that the new boiler plant is not in circuit when the
flushing takes place, especially if cleansing chemicals are used to
assist the process.

GAS 210 ECO PRO
14
114494-190310
5. Water-side connections
It is important to check the inhibitor concentration after installa-
tion, system modifications, filling the system and every service in
accordance with these instructions.
For the correct dosage and the suitability of inhibitors for use with
our boilers and for further information on water treatment or sys-
tem cleaning we advise direct contact with either of the following
companies:
‘Copal®’ manufactured by:
Fernox, Cookson Electronics
Forsyth Road
Sheerwater
Woking
Surrey GU21 5RZ
Tel No: 01483 793200
Fax No: 01483 793201
Email: [email protected]
Website: www.fernox.com
or:
5.1.3 Pressure relief valve
Install an pressure relief valve in the system, in accordance with
NEN 3028, between any valves and the boiler and in the flow pipe
within 0.5 m of the boiler.
5.1.4 Circulation pump
The boiler is equipped with a pump switch to connect an external
circulation pump. This pump is run once every 24 hours to prevent
sticking (24 hour pump operation). Only on/of f pumps can be con-
trolled. For connections, see Section 8.3.6.
The hydraulic resistance for the various output options of the
boiler is as follows:
Boiler type
Hydraulic resistance at
a dT of 20°C
Hydraulic resistance at a dT
of 10°C
mbar kPa mbar kPa
210-80 165 16,5 545 54,5
210-120 135 13,5 446 44,6
210-160 170 17,0 562 56,2
210-200 180 18,0 595 59,5
5.1.5 Water flow
The maximum temperature difference between flow and return,
and the maximum rate of rise of the flow temperature and boiler
block temperature are limited by the boiler's modulating controls.
As a result, the boiler is virtually unaf fected by low water flow.
However for a continuous supply of heat, the boiler requires a
minimum flow of 30 % of the nominal flow at the relevant design
temperatures.
Sentinal ‘X100®’ manufactured by:
Sentinel Performance Solutions
The Heath Business & Technical
Park
Runcorn
Cheshire,
WA7 4QX
Tel No: 0800 389 4670
Fax No: 0800 389 4677
Email: [email protected]
Website: www.sentinel-solutions.net
010203040
35
D
V
ΔT(°C)
P (%)
114492LTAL21H031
fig. 03 Output control characteristic
114492LTAL21H031
V = full load P = heat output
D = part load ∆T = temperature difference

114494-190310
GAS 210 ECO PRO
15
6. Gas-side connections
6.1 Gas connection
6.2 Gas pressure
114492LTAL21H003a
5+6 L3+4 L
fig. 04 Gas multiblocks
6.3 Gas/air ratio control
The boiler is suitable for use with natural gas and propane* cat-
egory II2H3P . For other types of natural gas, consult our Technical
department. All gas appliances must, by law, be installed by com-
petent persons (e.g. Corgi). Failure to install appliances correctly
could lead to prosecution. It is in your own interest and that of
safety to ensure that the law is complied with.
The gas connection is at the top of the boiler . We recommend
installing a gas filter in the gas supply pipe to avoid pollution of the
gas multiblock. The gas filter's resistance must not be so high that
the minimum inlet gas pressure can no longer be achieved.
* Refer to Broag for using propane.
The boiler has been factory set and tested by Remeha to natural
gas (G20) - with an inlet pressure of 17 mbar .
The boiler is suitable for 17 - 30 mbar inlet gas pressure.
For propane (LPG), an inlet pressure of 37 - 50 mbar is required.
The boiler has a zero governor gas valve. This gas valve main-
tains the ratio between the gas and air quantities in the burner at
a constant level under variable loads. This ensures clean and reli-
able combustion and high efficiency across the entire load range.
6. Gas-side connections

GAS 210 ECO PRO
16
114494-190310
7. Connecting the flue gas discharge and air supply
7. Connecting the flue gas discharge and air supply
The Remeha Gas 210 PRO is suitable for conventional room ven-
tilated or room sealed operation. Specify at the time of ordering if
the boiler is to be supplied for room sealed operation. In that case,
the boiler will be supplied with a purpose-designed room sealed
terminal, air supply connection and some accessories. The air
supply connection should rest on the heat exchanger underneath
the boiler casing after removing the standard perforated air inlet
cover. Horizontal components in the flue gas discharge system
should slope towards the boiler. Horizontal components in the air
supply system should slope towards the supply opening.
Room sealed terminals should comply with the national require-
ments for both horizontal and vertical outlet constructions.
Care should be taken when siting flue exit positions as a vapour
plume will be visible when the boiler is operational (flue gas tem-
perature will be less than 80°C resulting in the water vapour con-
densing out on contact with the air).
Classification due to discharging flue gases
The boiler is approved according to CE with classification:
Type B23: Conventional room ventilated appliance without draft
diverter. Air supply from boiler room; flue gas discharge on roof.
Type B23P: Conventional room ventilated boiler without draft
diverter. Air supply from boiler room: flue gas discharge on roof,
metal flue gas discharge with CE symbol, meets pressure class P1.
Type C13: Room sealed boiler, connected to combined wall outlet.
Type C33: Room sealed appliance, connected to combined roof
outlet.
Type C43: Room sealed appliance in cascade configuration, con-
nected via two ducts to a common duct system serving more than
one appliance.
Type C53: Room sealed appliance, connected to separate ducts
for the air supply and flue gas discharge, terminated in zones of
different pressure.
Type C63: Room sealed appliance, supplied without the terminal
or the air supply and flue gas discharge ducts.
Type C83: Room sealed appliance, connected to separate air
supply and flue gas discharge duct, with flue gas discharge duct
always in underpressure.
7.1 General
7.2 Conventional open flue installation
The open flue version extracts the necessary combustion air from
the plant room or compartment. A table showing the maximum dis-
charge lengths can be found in Section 7.2.1.

114494-190310
GAS 210 ECO PRO
17
7. Connecting the flue gas discharge and air supply

• The air supply opening must stay open.
• The installation area or boiler room must be equipped with the
necessary combustion air supply openings. These openings
must not be obstructed or shut of f.
• The combustion air supply must be free of dust and chemically-
aggressive agents (such as trichloroethylene or halogenated
hydrocarbons), as used in aerosol cans, certain types of
adhesive, certain solvents and cleaning agents, and paint, etc.
7.2.1 Possible lengths for the flue gas discharge pipe
Conventional room ventilated, type B23 according to CE.
fig. 05 Piping for the conventional room ventilated
Maximum permitted flue gas discharge lengths (L) in m
Boiler type D (mm) Free discharge
210-80
100 18
110 35
130 +
210-120
110 20
130 48
150 +
210-160
130 22
150 45
180 +
210-200
130 14
150 31
180 +
table 01 Flue gas discharge table for the open version
+ = Lengths up to 50m possible. For longer lengths, consult our
Technical department
When flue gas discharge pipes with diameters other than 150 mm
are used, an adapter is required: Ø150/100mm, Ø150/110mm,
Ø150/130mm or Ø150/180mm.

For each additional 90° or 45° bend, the pipe length must be
reduced by the amount shown in table 02.
D in mm length in m
90° bend 45° bend
Ø 100 R=½D 4.9 1.4
Ø 110 R=½D 5.4 5.1
Ø 130 R=D 1.8 1.0
Ø 150 R=D 2.1 1.2
Ø 180 R=D 2.5 1.4
table 02 Metres to be deducted per bend
The room sealed installation is based on the use of an air supply

GAS 210 ECO PRO
18
114494-190310
pipe connected directly to the boiler. This increases the number of
installation options within a building, while the discharge location is
subject to less stringent requirements because the air supply and
flue gas discharge can be incorporated in the same pressure field.
Additional ventilation will be required to the room/compartment in
accordance with BS 6644-2005 (compartment ventilation).
In addition, air from outside is usually cleaner, which has a ben-
eficial effect on the boiler service life. An air supply and flue gas
discharge table for the enclosed version of the boiler can be found
in table 03. For discharge in two different pressure fields, see Sec-
tion 7.3.2.

The boilers can be installed on a flue dilution system, but must
have a total flue break to avoid boiler controls being af fected
by the flue dilution fan pressures. For full details please contact
Broag.
7.3.1 Possible lengths for the air supply and flue
gas discharge
Room sealed appliance, type C33 according to CE.
Maximum acceptable flue gas discharge/air supply pipe
lengths (L) in m
Boiler
Model
Pipe Ø D
(mm)
Calculated with
concentric roof feed-
through Dnominal (mm) [m]
210-80
100 100 8
130 130 +
130 150 +
150 150 +
210-120
100 100 3
130 130 22
130 150 25
150 150 +
210-160
130 150 11
150 150 22
180 150 +
210-200
130 130 4
150 150 13
180 150 +
table 03 Air supply and flue gas discharge table for the
enclosed version
+ = Lengths up to 30m possible. For longer lengths, consult
our Technical department
fig. 06 Piping for the room sealed appliance
0021H7900017
7. Connecting the flue gas discharge and air supply
7.3 Room sealed installation

114494-190310
GAS 210 ECO PRO
19
7. Connecting the flue gas discharge and air supply
When air supply and flue gas discharge pipes with diameters other
than 150 mm are used, adapters are required: Ø150/100mm,
Ø150/110mm, Ø150/130mm or Ø150/180mm and, for connec-
tion to our standard combined vertical roof feed-through sets, also
Ø180/150mm, Ø130/150mm or Ø110/150mm.

For each additional 90° or 45° bend, the pipe length must be
reduced by the amount shown in table 04.
fig. 07 Vertical roof feed-through for room sealed operation
Pdf dakdoorvoer
D in mm length in m
90° bend 45° bend
Ø 100 R=½D 4.9 1.4
Ø 110 R=½D 5.4 5.1
Ø 130 R=D 1.8 1.0
Ø 150 R=D 2.1 1.2
Ø 180 R=D 2.5 1.4
table 04 Metres to be deducted per bend
For enclosed versions, combined vertical roof feed-through sets
are available, as well as sealing plates for flat roofs, in accordance
with the following drawings. Please consult our Technical depart-
ment for this option.
Ext
Ext Ext
Ext
Int
Int
Epo y lyrxae

GAS 210 ECO PRO
20
114494-190310
7. Connecting the flue gas discharge and air supply
7.3.2 Discharge in different pressure areas
For installations where supply and discharge points are in two dif-
ferent pressure zones CLV system please contact Broag Techni-
cal Dept. for further details and advice. The maximum acceptable
height difference between combustion air supply and flue gas
discharge is 36 m and the maximum acceptable length of the air
supply and flue gas discharge combined is shown in table 05.
fig. 08 Discharge in different pressure areas
Maximum permitted flue gas discharge and
air supply pipe lengths
Boiler model D in mm L in m
210-80 150 36
210-120 150 36
210-160 150 23
210-200 150 11
table 05 Air supply and flue gas discharge table for 'simplified
CLV system'