REMEHA Quinta 85 Manuel

Remeha Quinta 85

• High-efficiency

condensing boiler for wall

mounted installation

• Output: 14 - 90 kW

Technical information

Remeha Quinta 85

TABLE OF CONTENT

Preface 5

1 General description of the boiler 6

2 Construction 7

2.1 Boiler layout 7

2.2 Operating principle 8

3 Technical data and dimensions 9

3.1 Dimensions 9

3.2 Technical data 10

3.3 General Specification 11

3.4 Options 12

4 Efficiency information 12

4.1 Annual efficiency 12

4.2 Heat to water efficiency 12

5 Application information 12

6 Control and safety equipment 13

6.1 The control panel 13

6.1.1 General 13

6.1.2 Layout of the control panel 13

6.1.3 Combined key functions (in operating mode only) 14

6.1.4 Display of values with more than two digits 15

6.2 Flow diagram control system 16

6.3 Operating mode (x[[) 18

6.4 Shut-off mode (bXX) 19

6.5 Setting mode user level (X[[) 20

6.5.1 Flow temperature set point (!) 21

6.5.2 Pump run on time HTG (@) 21

6.5.3 DHW temperature set point (3) 22

6.5.4 Boiler control setting (A) 22

6.6 Setting mode service level (X00) 23

6.6.1 Flow temperature set point during forced part load ($) 25

6.6.2 High limit thermostat (%) 25

6.6.3 Fan speed at full load HTG (^) 25

6.6.4 Fan speed at part load (HTG and DHW - &) 25

6.6.5 Starting point modulation (*) 25

6.6.6 Interface selection (() 26

6.6.7 DHW cut-in temperature (B) 26

6.6.8 Fan Speed at DHW full load (C) 26

6.6.9 Forced part load time after start (HTG only - G) 26

6.6.10 DHW control stop set point (I) 27

6.6.11 DHW control option (J) 27

6.6.12 HTG cut in temp (N) 27

6.6.13 Boiler type (P) 27

6.6.14 Maximum delay time (U) 27

6.6.15 Start and end point analog signal (Qand Y) 28

6.7 Read-out mode (X00) 28

6.8 Fan speed mode (<00) 29

6.9 Failure mode (x00) 29

7 Installation instructions 30

7.1 General 30

7.2 Location 30

7.3 Flue gas discharge and air supply 31

7.3.1 General 31

7.3.2 Classification due to discharging flue gases 32

7.3.3 Material and installation 33

7.3.4 Single boiler conventional flue 33

7.3.5 Single boiler, room sealed flue 34

7.3.6 Different pressure zones 35

7.3.7 Modular installations 36

7.4 Hydraulic installation 36

7.4.1 Condensate and AAV discharge 36

7.4.2 Water treatment 37

7.4.3 Cold feed and expansion tank height for open vented systems 38

7.4.4 Safety valve 38

7.4.5 Gas connection 39

7.4.6 System pump 39

7.4.7 Waterflow 39

7.5 DHW production 39

8 Electrical installation 42

8.1 General 42

8.2 Specifications 42

8.2.1 Electrical supply 42

8.2.2 Control box 42

8.2.3 Fuse specification 42

8.2.4 Boiler temperature control 43

8.2.5 High limit temperature protection 43

8.2.6 Low-water protection (flow and content) 43

Remeha Quinta 85

8.3 External connections 43

8.4 Boiler control 44

8.4.1 Modulating (two wire control) 44

8.4.2 Analog control (0 -10 Volt dc) 46

8.4.3 On / off control (1 x no volt switched pair) 47

8.4.4 High / low control (2 x no volt switched pairs) 48

8.5 DHW control (Broag priority) 48

8.5.1 Temperature control 48

8.5.2 Primary flow control 48

8.6 System pump 48

8.7 Frost protection 48

8.8 Remote alarm and boiler run indication 48

8.9 Safety interlock 49

9 Commissioning 50

9.1 Shut-down 53

9.1.1 Temporary shut-down with frost protection 53

9.1.2 Permanent shut-down without frost protection 53

10 Fault-finding 54

10.1 General (all installations) 54

10.2 Fault codes 55

11 Inspaction and servicing instructions 59

11.1 General 59

11.2 Annual Inspection 59

11.3 Maintenance 60

11.4 Cleaning the fan 61

11.5 Cleaning the venturi 61

11.6 Cleaning the heat exchanger 61

11.7 Cleaning the burner assembly 61

11.8 Cleaning the siphon 61

11.9 Cleaning/replacing the ignition/ionisation electrode 62

11.10 Cleaning to inspection glass 62

11.11 Part list Quinta 85 boiler 63

PREFACE

These technical instructions contain useful and important information for the correct

operation and maintenance of the Remeha HTG boiler, model Quinta 85.

Read these instructions carefully before putting the boiler into operation, familiarise

yourself with it’s control functions and operation, strictly observing the instructions

given. Failure to do so may invalidate warranty or prevent the boiler from operating.

The installation and commissioning of the boiler must be carried out by a competent

Engineer, with the relevant certification ie: CORGI, ACOPS, IEE regs. etc.

On completion a copy of the commissioning sheet should be returned to Broag Ltd for

record purposes.

If you have any questions, or if you need more information about specific subjects

relating to this boiler, or it’s installation please do not hesitate to contact us.

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 technology employed may not be retrospective nor may

we be obliged to adjust earlier supplies accordingly.

Remeha Quinta 85

1 GENERAL DESCRIPTION OF THE BOILER

The Remeha Quinta 85 is a wall hung condensing boiler which may be also installed

free standing on a suitable frame (option). The one piece 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 section for maintenance purposes.

All electrical and electronic controls are contained within the instrument panel mounted

behind the drop down lower front panel.

The combined flue gas outlet and combustion air inlet are mounted on the top of the

boiler with the flow, return, gas and condensate connections located at the bottom.

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 4 bar. It must be installed on a fully pumped system and is suitable for use

on both sealed and open vented installations (minimum operating pressure of 0.8 bar).

The pre-mix, down firing gas burner (NG or PROPANE) with its gas/air ratio control

system ensures clean, trouble free operation with higher than average efficiencies of

109% (NCV) in the condensing mode combined with ultra low NOx and minimum CO

emissions. The standard control package 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’) continuously monitors the 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 it’s 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.

The boiler meets the requirements of the EC regulations according to the following

directives:

- 90/396EEC Gas appliances directive

- 92/42/EEC Efficiency directive

- 73/23/EEC Electrical low voltage directive

- 89/336/EEC Directive on electromagnetic compatibility E.M.C.

- 97/23/EEC Pressure equipment directive PED (art. 3, part 3)

Remeha Quinta 85 - PIN: 0063BL3253

2 CONSTRUCTION

2.1 Boiler layout

Fig. 01 Boiler layout Remeha Quinta 85

pdf

1. Automatic air vent

2. Air supply fan

3. Gas combi-block (with governor)

4. Gas injector/venturi

5. Cast aluminium heat exchanger

6. Temperature sensor-return

7. Air inlet tube

8. Pressure gauge

9. Control panel

10. Facility for incorporating a rematic®

weather compensated boiler control

11. Heat exchanger inspection cover

12. Sight glass

13. Combined ignition/ionisation probe

14. Temperature sensor-flow

15. Pre-mix burner

Remeha Quinta 85

2.2 Operating principle

Combustion air is drawn into the closed air box by a variable speed fan, through the

air inlet connection from the plant room (open flued) or from outside via the concentric

flue system (room sealed). On the inlet side of the fan is a specially designed venturi

which is connected to the outlet side of the gas combi block.

Depending on the demand (under the dictates of flow/return sensor and other external/

internal control inputs) the electronic control unit directly monitors the volume of gas

and air being delivered to the premix burner. This mixture is initially ignited by the

combined ignition/ionisation probe which then monitors the state of the flame. Should

the flame not ignite or is unstable within the pre-set safety time cycle the controls will

shut the boiler down (after 5 attempts) requiring manual intervention to reset the boiler.

The digital display will also 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 transfering 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 100/150 mm combined

flue/air connection to 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, transfering it’s 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.

3 TECHNICAL DATA AND DIMENSIONS

3.1 Dimensions

Fig. 02 Dimensions Remeha Quinta 85

00.W4H.79.00048 + 05.W4H.79.00024

Ê Return connection 1¼” BSP (m)

É Flow connection 1¼” BSP (m)

Ï Gas connection ¾” BSP (m)

Ò Condensate connection 25 mm Ø o/d (plastic)

Ñ Flue gas connection 100 mm Ø i/d

Ð Combustion air supply connection 150 Ø i/d or

** Combustion air supply connection 100 Ø i/d, see Par. 7.3.1

ã Holes for mounting bracket

Remeha Quinta 85

3.2 Technical data

Boiler type Quinta 85

General

Colour side and front casing

Colour instrument panel flap BS RAL 9016

7036

Boiler control options (External input)

(Two wire control)

On/off, High/low, Analog 0 -10V

Communicating Modulation

Nominal output (80/60ºC) kW 14.1 - 84.2

Nominal output (50/30ºC) kW 15.8 - 89.5

Nominal input (GCV / Hs) kW 16.2 - 95.3

Nominal input (NCV / Hi) kW 14.6 - 86.0

Weight dry kg 72

Noise level at 1 m from boiler dB(A) < 52

Gas- and flue details

Category II 2H3P

Min/Max Inlet pressure natural gas mbar 17 - 30

Min/Max Inlet pressure propane mbar 37 - 50

Gas consumption (natural gas) m3/h 1.5 - 9.1

Gas consumption (propane) m3/h 0.6 - 3.5

NOx-emission *) mg/kWh < 47

NOx-emission (O2= 0%, dry) *) ppm < 27

Residual fan duty Pa 160

Mass flue rate kg/h 23 - 138

Classification due to discharging flue

gases

B23, C13, C33, C43, C53,

C63, C83

Water side

Maximum flow temperature

ºC 100 (110)

Operating flow temperature ºC 20 - 90

Operating pressure min. (open vented) bar 0.3

Operating pressure min. (pressurised) bar 0.8

Operating pressure max. bar 4.0

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