Remeha Gas 210 EcoPro Brochure

A BIG STEP
IN REDUCING
YOUR
CARBON
FOOTPRINT.

REMEHA

CONDENSING

BOILER

RANGE

The most efficient way to

reduce your carbon footprint.

GAS 210 ECO PRO

2 3

INTRODUCTION

60% of the buildings that will be
standing in 2050 are already here with
us today. So tomorrow, there will be
a great need for intelligent heating
technology specifically designed
for refurbished buildings. This is
where Remeha’s advanced thinking
is leading the way to a future where
our highly efficient heating systems
help to improve the overall energy
efficiency of refurbished buildings.
Giving them new life and a more
sustainable future.

The Remeha Gas 210 ECO PRO is a
compact floor standing condensing
boiler. The small footprint and
ability to be installed back to back
makes it ideally suited for modular
configurations. An optional Optimising
Weather Compensating control
package is available to ensure
maximum efficiency. Now also
compatible with Open Therm.

The boilers are suitable for
both new and retrofit applications.
With conventional and room
sealed flue capability they can
be installed in most situations.

Full installation and technical
details can be found in the
Gas 210 ECO PRO Installation
and Service Manual, available
on our website or by contacting
us on 0118 978 3434.

CONTENTS

Introduction 2

Boiler description 2

Boiler construction 3

Efficiency/application
information 3

Advantages at a glance 4

Operating principle 4

Dimensions 5

Technical data 6

Typical installation 7-8

Typical flue installation 9-11

Electrical connections
and controls 12-15

REMEHA GAS 210 ECO PRO

OVERVIEW

BOILER DESCRIPTION

The Remeha Gas 210 ECO PRO boiler is a pre-assembled,
free standing, gas fired, high efficiency condensing boiler.

The sectional cast aluminium heat exchanger and other major
components are contained within a sealed air box. This forms the main
boiler casing with a removable front panel section for maintenance
purposes. All electrical and electronic controls are contained within the
instrument panel mounted on top of the boiler.

The flue gas outlet, combustion air inlet, flow, return and gas connections
are located on the top of the boiler with a condensate connection and
optional return connection at low level on the right hand side.

The boiler is suitable for room sealed or open flue applications and has
been designed for central heating and indirect hot water production at
working pressures not exceeding 6 bar. It must be installed on a fully
pumped pressurised system (minimum operating pressure 0.8 bar).

The pre-mix, down firing gas burner (NG + Propane only) with its gas/air
system ensures clean, trouble free operation with higher than average
efficiencies of 108.6% (NCV) in the condensing mode, combined with ultra
low NO

x and minimum CO

allows actual and set values to be read and adjusted on the built-in digital
display, which also provides normal operating and fault code indication.

An intelligent, advanced boiler control (abc
boiler conditions, varying the heat output to suit the system load. The
control is able to react to external “negative” influences in the rest of the
system (flow rates, air/gas supply problems), maintaining boiler output
for as long as possible without resorting to a lock out condition. At worst
the boiler will reduce its output and/or shut down (shut off mode) awaiting
the “negative” conditions to return to normal before re-starting. The abc
control cannot override the standard flame safety controls.

Every Remeha Gas 210 ECO PRO is checked, following assembly, by
means of a test computer to ensure its proper operation.

The boiler meets the requirements of the EC regulations of the directives:

- 90/396/EEC Gas appliances directive

- 92/42/EEC Efficiency directive

- 89/336/EEC E.M.C. directive

and complies with the following requirements:

- 73/23/EEC Electrical low voltage directive

- 97/23/EEC Pressure equipment directive
Article 3, Sub.3

CE Certification

Reference number 0085BS0132
NOx-Reference number BS004

emissions. The standard control package

2

®

) continuously monitors the

®

REMEHA GAS 210 ECO PRO

OVERVIEW

BOILER CONSTRUCTION

1. Air supply

2. Flue gas outlet

3. Combustion test point (O2/CO2)

4. Sealed air box

5. Differential air pressure switch (LD2)*

6. Venturi

7. Air supply fan

8. Premix, fibre faced burner

9. Combined ignition/ionisation probe

10. Sight glass

11. Gas combi-block

12. Cast aluminium, sectional heat exchanger

13. Temperature sensor - flow*

14. Temperature sensor - return*

15. Temperature sensor - heat exchanger*

16. Temperature sensor - flue gas (option)*

17. Drain pan (condensate)

18. Condensate connection

19. Heat exchanger inspection hatch

20. Instrument panel

21. Facility for incorporating a
weather compensator (optional)

22. Boiler setting keys

23. Read-out display and reset key

24. On/off switch

25. Gas connection

26. Flow connection

27. Return connection

28. Drain cock and optional second return
connection or low level return (option)

*Not illustrated

2622 23

11

27

24

6

2

3

4 8

19

1

21

10

7

9

12

17

25

20

28

18

ANNUAL EFFICIENCY

Up to 108.6% at Hi (up to 97.8% at Hs) at an average
return water temperature of 30°C (40/30°C).

Heat to water efficiency

a. Up to 98.4% at Hi (88.6% at Hs) at an average
water temperature of 70°C (80/60ºC).
b. Up to 105.7% at Hi (95% at Hs) at an average
water temperature of 40°C (50/30ºC).

Standing losses

On average, 0.21% at Hi (0.23% at Hs) at an average
water temperature of 45°C.

NOTE: NCV = Hi, GCV = Hs

APPLICATION INFORMATION

The Gas 210 ECO PRO can be used on all new and
refurbishment projects in both single and cascade
configurations. Conventional and room sealed flue system
capability means that the boiler can be sited almost
anywhere within a building.

The Remeha range of weather compensators (option) are
able to communicate directly with the boiler controls to
make full use of its fully modulating feature, ensuring that
the boiler closely matches the system demand at all times.
Our range of external control systems can be interfaced with
the boiler to provide on/off or modulating (0-10 V) control
options. For cascade flue arrangements a motorised flue/
gas damper is available as an accessory. The optional
SCU- S01 PCB will also be required.

A key benefit of the Remeha Gas 210 Pro is that it is
Renewable Energy Ready. Most renewable energy products
need to be backed up by a condensing boiler during periods
of peak demand.

The secondary return feature on the Remeha Gas 210 Pro
makes this boiler particularly suitable for use with
renewable energy technologies that use low grade heat
such as heat pumps or underfloor heating circuits.

Bivalent systems such as this combine the best of renewable
and conventional heating technologies to maximise the
seasonal efficiency of the system as a whole over the
course of the year.

4 5

ADVANTAGES
AT A GLANCE

Compact lightweight construction

High efficiency - 108.6% NCV at

40/30°C (97.8% GCV)

Boiler controls - On/Off High/Low

or Fully modulating over 18-100%

Premix burner for optimum

combustion

Low NOx < 38 expected seasonal

Ultra quiet < 59 dBA

Digital diagnostic display

Remote signalling options

Cast - sectional aluminium

heat exchanger

Easy maintenance

Options for direct weather

compensation

Compatible

with Open Therm

Advanced intelligent (abc®)

control system

Diagnostic PC connection

Conventional or “room sealed”

capability

Supplied fully assembled for

ease of installation

Renewable ready - optional low

level secondary return kit

REMEHA GAS 210 ECO PRO

OVERVIEW

OPERATING PRINCIPLE

Combustion air is drawn into the closed air box through the air inlet from
the plant room (open flued) or from outside via the eccentric flue system
(room sealed) by a variable speed fan.

The inlet side of the fan is fitted with a venturi, where air and gas are
mixed according to a fixed ratio. This ensures precise combustion.

This mixture is initially ignited by the combined ignition/ionisation probe
which monitors the state of the flame. Should the flame be unstable or
not ignite within the pre-set safety time cycle, the controls will (after 5
attempts) shut the boiler down, necessitating manual intervention to reset
the boiler. The digital display will indicate a flashing fault code confirming
the reason for the failure.

The products of combustion in the form of hot flue gases are forced
through the heat exchanger transferring their heat to the system
water (the flue gas temperature is reduced to approximately 5°C above
the temperature of the system return water), then discharged via the
condensate collector, vertically through the 150mm connection to
the atmosphere.

Because of the low flue gas exit temperature there will be a vapour cloud
formed at the flue gas terminal - this is not smoke, simply water vapour
formed during the combustion process.

If the controls allow the flow and therefore return temperature to fall
below dew point (55°C), this water vapour will begin to condense out in
the boiler, transferring its latent heat into the system water, increasing
the output of the boiler without increasing the gas consumption.

Condensation formed within the boiler and flue system is discharged from
the boiler to an external drain via the drain pan/siphon supplied.

The boiler can be supplied, as an option, with a second (fixed temperature)
return connection. This additional connection enables the boiler to make
full use of its condensing ability whilst accepting both fixed and variable
temperature returns from the same system.

DIMENSIONS

3/4/5 Section 6 Section

*or optional low level secondary return connection

Maintenance area for two boilers side to side

*

NOTE: For other configurations, please consult technical manual

SPACE SAVING
CONFIGURATIONS

50

REMEHA GAS 210 ECO PRO

1

Gas - 1

/4” BSP(M) 11/4” BSP(M)

Return - 11/4” BSP(M) 11/2” BSP(M) (when supplied adapter fitted)

Flow - 11/4” BSP(M) 11/2” BSP(M) (when supplied adapter fitted)

Flue Gas 150mm i/d 150mm i/d

32mm o/d plastic 32mm o/d plastic

Air in 150mm i/d 150mm i/d

‘A’ h eight - 1309mm 1324mm

Optional

2nd Return* -

1

/4” BSP(M)1

1

1490

1190

1

/4” BSP(M)

250

OVERVIEW

1490

250119050

450

1050

600*

* Minimum 600mm. We recommend 1m

1690

450

1190

50

1890

2501190450

1490

50

450

600*

1500

450

* Minimum 600mm. We recommend 1m

1190

250

600900

3000

600

450 450

All dimensions in mm