Vaillant turboMAX pro 24/2 E, turboMAX pro 28/2 E Instructions For Installation And Servicing
For the installer
Instructions for Installation and Servicing
turboMAX pro
Wall hung room sealed fan assisted
combination and system boilers
24/2 E
28/2 E
GB
Table of Contents
1 List of Contents . . . . . . . . . . . . . . . . . . . . . 3
1.1 Contents included with boiler (turboMAX pro)3
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 General Information . . . . . . . . . . . . . . . . . . . . . 4
2.2 EC designation . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Boiler Specification . . . . . . . . . . . . . . . . . . . 5
3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Boiler connections . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 6
4 General Requirements . . . . . . . . . . . . . . . . . 7
4.1 Related documents . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 Flue system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4.1 Top outlet flue system . . . . . . . . . . . . . . . . . . . . 8
4.4.2 Rear outlet flue system . . . . . . . . . . . . . . . . . . . 8
4.4.3 Extended top outlet flue system . . . . . . . . . . . 8
4.4.4 Flue termination . . . . . . . . . . . . . . . . . . . . . . . . 9
4.5 Air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.6 Cupboard or compartment ventilation . . . . . . 9
4.7 Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.8 Guide to system requirements . . . . . . . . . . . . . 10
4.8.1 Water circulation system . . . . . . . . . . . . . . . . . . 10
4.8.2 Filling and make up . . . . . . . . . . . . . . . . . . . . . . 10
4.8.3 Pressure relief valve . . . . . . . . . . . . . . . . . . . . . 10
4.8.4 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8.5 Expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8.6 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . 11
4.8.7 System by-pass . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.8.8 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Gas supply adjustments (Commissioning Part II) 21
7.1 Gas inlet working pressure . . . . . . . . . . . . . . . . 21
7.2 Main burner pressure . . . . . . . . . . . . . . . . . . . . 21
7.3 Adjusting the central heating output
(range rating) . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.4 Burner pressure and gas rate . . . . . . . . . . . . . . 23
7.5 Fit combustion chamber cover . . . . . . . . . . . . . 24
7.6 Fit boiler casing . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Functional checks (Commissioning Part III) . 25
8.1 Functional checks . . . . . . . . . . . . . . . . . . . . . . . 25
8.2 Functional check of operation . . . . . . . . . . . . . 25
8.3 Adjusting pump speed . . . . . . . . . . . . . . . . . . . . 26
8.4 Handing over to the user . . . . . . . . . . . . . . . . . 26
9 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.1 Initial inspection . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.2 Cleaning the burner and primary heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . 29
10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.2 Logical fault finding procedure . . . . . . . . . . . . 29
11 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.1 Functional flow diagram . . . . . . . . . . . . . . . 37
11.2 Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Benchmark gas boiler commissioning
checklist..................................... 39
5 Boiler Installation Sequence . . . . . . . . . . . . 12
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Using boiler template . . . . . . . . . . . . . . . . . . . . 13
5.3 Fitting the boiler hanging bracket . . . . . . . . . . 13
5.4 Install the flue system . . . . . . . . . . . . . . . . . . . . 14
5.5 Fitting the boiler . . . . . . . . . . . . . . . . . . . . . . . . 14
5.6 Removing boiler casing . . . . . . . . . . . . . . . . . . . 14
5.7 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.8 Cold water mains inlet and hot water outlet . . 15
5.9 Central heating flow and return pipework . . . 15
5.10 Connect the flue system to the boiler . . . . . . . 16
5.11 Electrical installation . . . . . . . . . . . . . . . . . . . . . 16
5.12 Connection to the main supply . . . . . . . . . . . . 16
5.13 Electronic board layout . . . . . . . . . . . . . . . . . . . 17
5.14 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Commissioning Part I . . . . . . . . . . . . . . . . . 20
6.1 Preliminary electrical checks . . . . . . . . . . . . . . 20
6.2 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3 Cold water supply . . . . . . . . . . . . . . . . . . . . . . . 20
6.4 Filling the heating system . . . . . . . . . . . . . . . . . 20
6.5 Initial system flush („cold“) . . . . . . . . . . . . . . . 20
Instructions for Installation and Servicing turboMAX pro R32
1 List of contents
8
7
6
1
2
5
4
I
0
3
9
10
1.1 Contents included with boiler
Ensure that all contents are included before commencing installation.
Note!
DO NOT remove the boiler from the polystrene
base at this stage.
List of contents 1
Fig. 1.1: Items supplied with unit (turboMAX pro)
Item Quantity Description
1 1 Boiler
2 1 Flue restriction ring
3 1 Cold water inlet valve
4 3 Flow and return service value, gas service
valve
5 5 Copper tails for water outlet connection
6 1 Template
7 1 Guarantee Card
8 1 Installation and connection accessories and
PRV packages incl. DHW outlet union nut
9 3 Installation and Servicing, Users and Flue
Installation Instructions
10 1 Hanging bracket
Instructions for Installation and Servicing turboMAX pro R3 3
2 Introduction
2 Introduction
2.1 General Information
Note!
This boiler must be installed and serviced by a
competent person in accordance with the Gas
Safety (Installation and Use) Regulations 1998.
In the UK „CORGI“ registered installers undertake the work to a safe and satisfactory
standard.
The turboMAX pro is a fully automatic, wall mounted,
room sealed combination boiler for central heating and
domestic hot water. Domestic hot water is supplied
directly from the boiler, without requiring a copper
cylinder, cold water tank, feed and expansion tank and
associated pipework. Domestic hot water has priority
over central heating. The boiler has been designed for
use with a sealed central heating system, and comes
fully tested and assembled with a built in circulating
pump, expansion vessel and diverter valve.
The turboMAX pro has an output for domestic hot water
of 24 or 28 kW. The boiler is easily sited on any internal
wall and can be installed with either a horizontal or
vertical RSF (room sealed fan assisted) flue. Two types
of flue system are available, rear flue outlet, top outlet
(with turret) concentric flue system (100 mm outside
diameter) and an extended concentric flue system
(125 mm outside diameter). Flue extensions and additional bends and elbows are available for both flue systems
to increase the siting flexibility. The boiler is not suitable
for external installation. This boiler is available in Natural
Gas. An optional LPG conversion kit is available. If desired, an inhibitor may be used in the system. Guidance on
the use of inhibitors is contained in these instructions.
The boiler contains a domestic hot water heat exchanger. The temperature in the heat exchanger is limited by
the boiler control system and it is not necessary to
install a scale reducer on the cold mains to the boiler.
However, in exceptionally hard water areas to prevent
scale formation in the property hot water system pipework, a scale reducer may be fitted.
turboMAX pro combination boilers have a built in diagnostic system which indicates the operational status of
the boiler. This feature provides key information to aid
commissioning and fault finding.
The data badge is fitted on the rear of the control panel.
See text of General Requirements for installation requirements or notes.
Vaillant ltd. support the Benchmark initiative.
In this installation manual you will find the Benchmark
gas boiler commissioning checklist. It is very important
that this is completed correctly at the time of installation and commissioning..
Important!
When tightening or slackening screwed connections always use suitable open-ended spanners
(not pipe wrench, or extensions, etc.).
Incorrect use and/or unsuitable tools can lead to
damage being caused (e.g. gas or water leakage)!
2.2 EC designation
turboMAX pro (24/28) a carry the "CE" Mark. This
demonstrates that the boilers fulfil the essential requirements of the Gas Appliance Directive(90/396/EEC) and
the Gas Appliance (Safety) Regulations 1992.
The "CE" Mark also demonstrates that the boilers comply with the requirements of the Electromagnetic
Compatibility Directive (89/336/EEC), the Low Voltage
Directive (72/23/EEC), the Boiler Efficiency Directive
(92/42/EEC) and the Boiler (Efficiency) Regulations 1993.
Instructions for Installation and Servicing turboMAX pro R34
Boiler Specification 3
3 Boiler Specification
3.1 Technical Data
turboMAX pro 24/2 E turboMAX pro 28/2 E Units
(VUW GB 242/2-3) (VUW GB 282/2-3)
Maximum CH heat input (net) 29.7 (101.000) 31.1 (106.200) kW (Btu/h)
CH heat output range (80/60 °C) 8.9 - 24 10.4 - 28
(30.400 - 81.900) (35.500 - 95.500) kW (Btu/h)
Maximum DHW heat input (net) 26.7 (91.200) 31.1 (106.200) kW (Btu/h)
SEDBUK Band D D
SAP Seasonal Efficiency 79.6 79.7 %
DHW heat output 24 28 kW
DHW flow rate ∆T = 35 °C rise 9.8 11.5 l/min
DHW flow rate at factory set
temperature rise (∆T 42 °C) 8.2 9.5 l/min
Mains water pressure required
for max. flow rate 0.5 0.5 bar
Minimum water flow rate 1.5 1.5 l/min
Mains water pressure required
for min. flow rate 0.15 0.15 bar
Maximum inlet water pressure 10 10 bar
Inlet gas working pressure
required (natural gas) 20 20 mbar
Gas supply (G20) Gross CV (s.t.) 37.8 37.8 MJ/m
Gas burner pressure max. rate (natural gas) G 20 9.8 10.8 mbar
(LPG 3+) G 30/31 28 - 30/37 28 - 30/37 mbar
Gas burner pressure ignition rate G 20 1.9 1.8 mbar
G 30/31 3.9/5.4 3.8/5.3 mbar
Gas rate max. (DHW) - 2.8 3.3 m3/h
CH temperature flow range 35 - 82 35 - 82 °C
Minimum CH water flow
(for 20 °C rise) 1032 1203 l/h
Pump pressure available 0.25 (25) 0.25 (25) bar (KPa)
Expansion vessel
pre-charge pressure 0.75 0.75 bar
Maximum CH system pressure 3 3 bar
Weight 42 45 kg
Primary water content 2.0 2.0 l
Electrical supply 230/50 230/50 V~/Hz
External fuse 3 3 A
Power input 150 150 W
Case height 800 800 mm
Case width 440 440 mm
Case depth 338 338 mm
3
Instructions for Installation and Servicing turboMAX pro R3 5
3 Boiler Specification
C
C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
16
18
19
21
22
23
24
25
26
27
28
29
30
31
0
7
6
264638
145
6
5
100
100
35 35
432
130
180
1
148
8
543 2 1
902
3.2 Boiler connections
3.3 Functional Diagram
Fig. 3.1: Connection diameters turboMAX pro
Key:
1 Heating system return (22 mm tail)
2 Cold water connection with shut off valve
(15 mm tail)
3 Gas connection (15 mm tail)
4 Hot water connection (15 mm tail)
5 Heating system flow (22 mm tail)
Fig. 3.2: Functional Diagram
6 Flue outlet (100 mm flue with turret)
7 Hanging bracket
8 Rear flue outlet
1 Air duct
2Fan
3 Main heat exchanger
4 Temperature sensor (NTC I)
5 Flame sensing electrodes
6 Modulating burner
7 Fully modulating automatic gas value
8 Maximum hot water temperature control
9 Maximum radiator temperature control
10 Diverter valve
11 DHW heat exchanger
12 Automatic bypass valve
13 CH flow service valve
14 Hot water outlet
15 Gas service valve
16 Cold water service valve
17 CH return service valve
18 Pressure relief valve
19 Aqua sensor (DHW flow switch)
21 Main on/off control
22 Pressure gauge
23 Indicator lights
24 Expansion vessel
25 Expansion vessel charging valve
26 Circulating pump
27 Automatic air vent
28 Ignition electrode
29 Temperature sensor (NTC II)
30 Air pressure switch
31 Flue gas duct
Instructions for Installation and Servicing turboMAX pro R36
General Requirements 4
4 General Requirements
4.1 Related Documents
The installation of the boiler must be in accordance with
the relevant requirements of Gas Safety (Installation
and Use) Regulations 1998, Health and Safety Document
No. 635 (The Electricity at Work Regulations 1989),
BS7671 (IEE Wiring Regulations) and the Water Supply
(WaterFittings) Regulations. It should also be in accordance with the relevant requirements of the Local
Authority, Building Regulations, Building Standards
(Scotland) Regulations and the relevant recommendations of the following British Standard; Including current
amendments to Approved Documents Part L and J.:
BBSS 55444400::
exceeding 70 kW net:
- Part 1: Flues
- Part 2: Ventilation
BBSS 55444499::
for domestic premises.
BBSS 55554466::
domestic premises.
BBSS 66770000::
within buildings and their curtilages.
BBSS 66779988::
boilers not exceeding 70 kW input net.
BBSS 66889911::
gas pipework up to 28 mm (R1) in domestic premises
nd
family gas).
(2
BBSS 77559933::
central heating systems.Institute of Gas Engineers
Publication IGE/UP/7/1998: Guide for Installation in
Timber Framed Housing. Benchmark Code of Practice.
Building Regulations Approved Documents Part L 2002
Part J 2002.
Flues and ventilation of gas fired boilers not
Specification for forced circulation hot water
Specification for gas hot water supplies for
Services supplying water for domestic use
Specification for installation of gas fired
Specification for installation of low pressure
Treatment of water in domestic hot water
Important!
The appliance must be installed and serviced by
a competent person as stated in the Gas Safety
(Installation and Use) Regulations 1998.
Standards (Scotland) Regulations, in respect of the
installation of a boiler in a room containing a bath or
shower.
Note!
Where a room sealed boiler is installed in a
room containing a bath or shower, any electrical
switch or boiler control utilising mains electricity should be so situated that it cannot be touched by a person using the bath or shower.
Where the installation of the boiler will be in an unusual
location, special procedures may be necessary and BS
5546 and BS 6798 give detailed guidance on this
aspect. The boiler must be mounted on a flat, vertical
wall, which must be sufficiently robust to take the
weight of the boiler. The boiler may be installed on a
combustible wall, subject to the requirements of the
Local Authorities and Building Regulations.
A compartment used to enclose the boiler must be designed and constructed specifically for this purpose. (An
existing cupboard or compartment may be used provided that it is modified for the purpose). Details of essential features of cupboard/compartment design including
airing cupboard installations are given in BS 6798.
If the boiler is to be fitted in a timber framed building, it
should be fitted in accordance with Institute of Gas
Engineers Publication IGE/UP/7/1998 „Guide for Gas
Installation in Timber Framed Housing“.
4.3 Gas Supply
The gas supplier should ensure the availability of an
adequate supply of gas.
A gas meter may only be connected to the service pipe
by the supplier of gas or their contractor.
An existing meter should be checked to ensure that it is
capable of passing the rate of gas supply required.
Installation pipes should be fitted in accordance with BS
6891.
Pipework from the meter to the boiler must be of an
adequate size. Do not use pipes of a smaller size than
the boiler gas connection (15 mm).
The complete installation must be tested for soundness
and purged as described in BS 6891.
Preliminary remarks
This appliance should only be installed in conjunction
with a Vaillant flue system.
Install the flue system as detailed in the separate flue
installation instructions supplied with this boiler.
4.2 Boiler location
The location chosen for the boiler must permit the
provision of a satisfactory flue termination. The location
must also provide adequate space for servicing and air
circulation around the boiler. The boiler may be installed
in any room, although particular attention is drawn to
the requirements of BS7671 (IEE Regulations) and, in
Scotland, the electrical provisions of the Building
Instructions for Installation and Servicing turboMAX pro R3 7
4.4 Flue system
Note!
The boilers are delivered ready for installation
utilising a top outlet flue assembly. For installation with a rear outlet flue assembly refer to
the boiler flue outlet adaptation instructions
supplied with the rear flue accessory.
4 General Requirements
70
1103
70
15
48
1285
603
4.4.1 Top outlet flue system
(100 mm outside diameter)
The top outlet horizontal flue system (Art. No. 303 807)
is suitable for installations up to 720mm measured from
the centre of the boiler flue outlet to the outside face of
the wall. Flue extensions are available to extend this
length up to 4.5 m for 24 kW and 3.2 m for 28 kW.
Both 90° bends and 45° elbows are also available to
increase siting flexibility.
A vertical flue system is also available
(Art. No. 303 800).Refer to flue system installation
instructions for full details.
800
48
4
48
Fig. 4.1: Art.-No. 303 807
A vertical flue system is also available
(Art. No. 303 800).
Refer to flue system installation instructions for full
details.
4.4.2 Rear outlet flue system
(100 mm outside diameter)
The rear outlet horizontal flue system (Art. No. 303 817)
is suitable for installations up to 600 mm wall thickness.
800
Fig. 4.3: Art.-No. 303 817
4.4.3 Extended top outlet flue system
(125 mm outside diameter)
A top outlet horizontal flue system of 125 mm outside
diameter is also available (Art. No. 303 609) and can be
used to achieve flue lengths of up to 12.9 m for 24 kW;
10 m for 28 kW.
Both 45° and 90° bends and elbows are also available to
increase siting flexibility.
A vertical 125 mm concentric flue system is also available (Art. No. 303 600).
Refer to flue system installation instructions for full
details.
Fig. 4.2: Art.-No. 303 800
Fig. 4.4: Art.-No. 303 609
Instructions for Installation and Servicing turboMAX pro R38
General Requirements 4
A
BCD
A
G
H, I
F
J
B
F
M
L
L
K
K
G
G
F
F
E
A
A
4.4.4 Flue termination
The following details refer to both flue systems.
a. The terminal must be positioned such that the pro-
ducts of combustion can disperse freely at all times.
b. In certain weather conditions a plume of water
vapour may be visible from the flue terminal.
Positions where this could be a nuisance should be
avoided.
c. If the terminal is fitted less than 2 m above a bal-
cony, above ground or above a flat roof to which
people have access then a suitable terminal guard;
280 mm x 280 mm x 270 mm deep, must be provided and fitted (made by Tower Flue Components,
Tonbridge, TN9 1TB).
Note!
Vertical flues must not terminate within
600 mm of an openable window, air vent or any
other ventilation opening.
The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part of the building.
Terminal position for fan-assisted flue
(minimum distance) mm
A1)Directly below an openable, above an opening
or horizontal to an opening i.e. air brick, opening
window or other, etc 300
B Below gutters, soil pipes or drain pipes 25
C Below eaves 25
D Below balconies (below car port roof) 25
E From vertical drain pipes and soil pipes 25
F From internal or external corners 25
G Above ground or balcony level 300
H From a surface or boundary facing a terminal 600*
H From a terminal facing a terminal 1200
J From an opening in a car port (e.g. door, window)
into a dweling 1200
K Vertically from a terminal on the same wall 1500
L Horizontally from a terminal on the same wall 300
M Distance from adjacent wall for vertical Flue 500
1) In addition, the terminal should not be nearer than 150mm to an
opening in the building fabric formed for the purpose of
accommodating a built-in element such as a window.
* BS 5440-1 It is recommended that a fanned flue terminal should
be positioned as follows: a) at least 2m from an opening in a building directly opposite, and b) so that the products of combustion
are not directly directed to discharge across a boundary.
4.5 Air supply
Detailed recommendations for air supply are given in BS
5440: Part 2. It is not necessary to have an air vent in
the room or internal space in which the boiler is installed.
Fig. 4.5: Flue termination
4.6 Cupboard or compartment ventilation
The boilers are very high efficiency appliances. As a consequence the heat loss from the appliance casing during
operation is very low. For cupboard or compartment installations it is therefore not necessary to provide any high
or low level permanent air vents for cooling purposes.
4.7 Electrical supply
A 230 V, ~ 50 Hz single phase electricity supply fused to
3 Amp. must be provided in accordance with the latest
edition of BS7671 (IEE Wiring Regulations) and any other
local regulations that may apply.
The method of connection to the mains electricity supply must provide a means of completely isolating the boiler and its ancillary controls. Isolation is preferably by
the use of a fused three pin plug and unswitched shuttered socket outlet, both complying with the requirements
of BS 1363. Alternatively, a 3 Amp. fused doublepole
Instructions for Installation and Servicing turboMAX pro R3 9
switch with a 3 mm contact separation on both poles
may be used.
4 General Requirements
Important!
This appliance must be earthed.
4.8 Guide to system requirements
4.8.1 Water circulation system
Detailed recommendations for the water circulation
system are given in BS 6798 and BS 5449: Part 1 (for
small bore and micro bore central heating systems).
Pipework not forming part of the useful heating surface
should be insulated to help prevent heat loss and
possible freezing, particularly where pipes are run
through roof spaces and ventilated underfloor spaces.
Draining taps must be located in accessible positions
which permit the draining of the whole system including
the boiler and the hot water system. Draining taps
should be at least 1/2 in. BSP nominal size and be in
accordance with BS 2879.
The boiler is suitable for use with minibore or microbore
systems. Copper tubing to BS 2871: Part 1 should be
used for water carrying pipework. All capillary joints in
all DHW pipework must be made with lead free solder.
Particularly where a new boiler is to be fitted to an
existing system, it is good practice that the system is
thoroughly cleansed.
Important:
To prevent the formation of deposits and prevent serious damage to the appliance and
system , cleansers must be used carefully and
must be completely removed by thoroughly
flushing the system. Cleansers should only be
left in systems for a maximum of 24 hours.
This cleansing must take place prior to the fitting of the
new boiler and be in accordance with BS 7593.
For advice on the application of system cleansers
contact either Sentinel, GE Betz. Widnes, Cheshire,
WA8 8UD. Tel: 0151 420 9595
4.8.2 Filling and make up
The system can be filled using the built in filling loop.
The connection must be removed when filling is
completed. Where local Water Authority regulation does
not allow temporary connection, a sealed system filler
pump with break tank must be used. The heating system
will not be filled automatically from the domestic hot
water side.
(Alternative methods of filling sealed systems are given
in BS 5449).
4.8.3 Pressure relief valve
A pressure relief valve is provided with the boiler. This
safety device is required on all sealed C.H. systems and
is preset at 3 bar and provided with a 15 mm
compression connection for a discharge pipe, which
must be of no less than 15 mm in diameter. The
Pressure Relief Valve must not be used for draining
purposes.
4.8.4 Pressure gauge
This is factory fitted to the boiler and indicates the
primary circuit pressure to facilitate filling and
testing.
4.8.5 Expansion vessel
The 24 kW boiler incorporate a 6 litre expansion vessel
which is suitable for a sealed heating system with a
maximum water content of 60 litres. A 10 litre
expansion vessel kit is available as an optional
accessory.
The 28 kW boilers incorporate a 10 litre expansion
vessel which is suitable for a sealed heating system with
a maximum water content of 100 litres. If the nominal
capacity of the built in expansion vessel is not sufficient
for the heating system (for instance in case of modernization of old open systems) an additional expansion
vessel can be installed external to the boiler. It should
be fitted in the return pipe as close as possible to the
boiler in accordance with BS 5449: Part 1. Guidance on
the sizing of an additional expansion vessel is given in
Table.
Vessel Volume [L]
Initial system pressure (bar) 1.0 1.5
Pressure relief valve setting (bar) 3.0
Total water content of system ltres
25 2.7 3.9
50 5.4 7.8
100 10.9 15.6
125 13.6 19.5
150 16.3 23.4
175 19.1 27.3
200 21.8 31.2
225 24.5 35.1
250 27.2 39.0
275 30.0 42.9
300 32.7 46.8
325 35.7 50.7
350 38.1 54.6
375 40.9 58.5
400 43.6 62.4
425 46.3 62.4
450 49.0 58.5
475 51.8 74.1
500 54.5 78.0
For system volumes other than those given
above, multiply the system volume by the
factor across 0.109 0.156
Instructions for Installation and Servicing turboMAX pro R310
4.8.6 Circulating pump
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400
50
100
150
200
250
300
350
400
450
500
550
600
650
700
Volume flow [l/h]
Lift [mbar]
setting III
setting II
The circulating pump is included in the boiler. The pump
head available for the heating system is shown in
fig. 4.6.
General Requirements 4
Fig. 4.6: Pump specifications
4.8.7 System by-pass
An automatic system by-pass is included within the boiler. The boiler is suitable for use in systems with thermostatic radiator valves and no additional by-pass is
required.
4.8.8 Venting
The boiler is fitted with an automatic air vent. Additional
provision should be made to enable the heating system
to be vented during filling and commissioning either by
automatic air vents or manually.
Instructions for Installation and Servicing turboMAX pro R3 11
150
5
200
500
5
I
0
0120
60
9030
°C
bar
4
3
2
1
0
5 Boiler Installation Sequence
440
800
338
I
0
0120
60
9030
°C
bar
4
3
2
1
0
5 Boiler Installation Sequence
5.1 General
Preparation of boiler location
Clearances required
Mount the boiler on a flat and vertical area of wall of
sufficient area for the boiler plus the required clearances for installation and servicing.
The clearances are as detailed below and are shown on
the installation template supplied with the boiler:
- 150 mm below the boiler
- 5 mm on either side of the boiler
- 210 mm on top of the boiler
- 500 mm in front of the boiler*
* Clearance is only required to enable easier access to
the boiler for servicing and may be provided by an
openable door, etc.
Note!
If the boiler is to be fitted in a timber framed
building, it should be fitted in accordance with
Institute of Gas Engineers Publication
IGE/UP/7/1998 „Guide for Gas Installations in
Timber Framed Dwellings“.
Fig. 5.2: Free space required for installation
Selecting position of boiler
Refer to „Boiler location“ for information regarding siting the appliance. In general the boiler must be positioned such that.
• There is adequate space around the boiler for service
and maintenance.
• The boiler can be correctly flued, i.e. the flue terminal
position is sited in accordance with the flue termination section and the air/flue duct can be installed in
accordance with the flue installation instructions supplied.
• All necessary pipework can be connected, including
the pressure relief valve.
Note!
Should it be necessary to run system pipework
to above the boiler within the width of the
casing, use the optional top connection accessory (Art.No. 306 251).
Fig. 5.1: Dimensions of boiler
Instructions for Installation and Servicing turboMAX pro R312
Boiler Installation Sequence 5
55
210
124163 21200/202/240/242/280/282/824/828 Pro/Plus
60/100
07/2002
2
3
1
turboMAX only
3
402
171
174,5
12,5
1
1
2
5.2 Using boiler template
Fix the paper template to the wall ensuring that the correct flue exit point has been identified, ensure that the
template is vertical.
The template shows
- The position of the fixing holes for the boiler mounting bracket (1).
- The position of the connections.
- The position of the flue exit hole.
- Upper hole (2) indicates top outlet flue with flue turret facing rearward.
- Lower hole (3) indicates rear outlet flue exiting
directly through wall.
• Mark the position of the hanging bracket fixing holes (1).
• Drill 2 holes Ø 8 mm for the hanging bracket.
Note!
Use alternative fixing holes where necessary.
Identify correct flue exit
Mark the centre of the selected air/flue duct and its circumference, e.g. by drilling through the template. For
installation of a rear exit outlet please refer to the
installation instructions of the rear exit outlet kit
(Art. No. 303 817).
Other flue options
Flue instructions for other flue systems such as vertical
RSF flues, flues run to the side of the boiler and the use
of additional bends etc. are detailed in the flue installation instructions provided with the boiler.
Remove the template from the wall and plug the drilled
holes using the wallplugs supplied.
5.3 Fitting the boiler hanging bracket
Fix the hanging bracket (2) to the wall using the screws
supplied. (it may be necessary to use additional or
alternative fixings to ensure adequate support).
Fig. 5.3: Using Boiler template
Fig. 5.4: Free space required for installation
Note!
If the boiler is to be fitted in a timber framed
building ensure that the bracket is secured to a
substantial part of the timber frame capable of
taking the weight of the boiler.
Instructions for Installation and Servicing turboMAX pro R3 13
I
0
1
2
5 Boiler Installation Sequence
3
I
0
2
I
0
90°90°
1
5.4 Install the flue system
Install the flue system (refer to separate air/flue duct
installation instructions).
5.5 Fitting the boiler
• Lift the boiler (3) up to the wall so that it is slightly
above the hanging bracket (1).
Note!
Lift the boiler from either side at the bottom
edge.
• Lower the boiler slowly onto the hanging bracket so
that the cross member at the rear of the boiler fully
engages onto the hanging bracket.
5.6 Removing boiler casing
• Turn both securing fasteners (1) anti-clockwise by 90°
to release control panel (2).
• Pull the case (3) forward at the bottom to disengage
from the securing clips.
• Lift the case slightly to clear the top locations and pull
forward to remove.
5.7 Gas supply
• Connect the 15 mm compression gas service cock (1)
supplied with the appliance (2) and tighten.
• Connect a gas supply pipe of not less than 15 mm
diameter to the gas service cock.
• Tighten all connections.
(Ensure the gas supply pipework is adequately sized
such that a 20 mbar gas pressure is available at the
boiler inlet at full flow rate).
Fig. 5.5: Remove of boiler casing
Fig. 5.6: Fitting the gas connection
Instructions for Installation and Servicing turboMAX pro R314
Boiler Installation Sequence 5
1
2
3
4
6
I
0
I
0
4
1
2
3
5
6
5.8 Cold water mains inlet and hot water outlet
Flush all foreign matter from the mains supply before
connecting to the boiler.
• Connect the cold water service valve (1) to the cold
inlet water connection (3) of the appliance with the
washer (2) provided and tighten.
• Connect the cold water inlet pipe copper tail to the
cold water service valve and tighten.
• Connect the 15 mm hot water outlet copper tail (4) to
the hot water outlet connection of the appliance (6)
with the washer provided (5) and tighten.
Note!
The hot water outlet union nut is packed in with
the PRV fitting pack.
5.9 Central heating flow and return pipework
Before connecting the heating circuit to the boiler appliance, all pipework and radiators must be thoroughly
flushed to remove any installation debris.
• Connect the central heating flow (4) and return (1) service valves to the appliance (6 and 3) with the washers
provided (2 and 5) and tighten the nuts. Ensure that
the valve spindles face downwards and the drain
points face to either side of the boiler.
• Connect the central heating pipework to the flow (4)
and return (1) tails.
Pressure Relief Valve
Connect a discharge pipe not less than 15 mm diameter
to the outlet of this valve.
The discharge pipework should be as short as possible
and installed with a continuous fall away from the boiler.
The pipe should terminate in a position which ensures
that any discharge of water or steam from the valve
cannot create a hazard to persons in or about the premises, or cause damage to any electrical components or
external wiring, and the point of discharge should be
clearly visible (see diagram in plastic bag).
Fig. 5.7: Fitting the hot and cold water connections
Fig. 5.8: Central heating flow and return pipework
Instructions for Installation and Servicing turboMAX pro R3 15
5 Boiler Installation Sequence
2
1
5.10 Connect the flue system to the boiler
• Refer to separate air/flue duct installation instructions
included with the boiler.
5.11 Electrical installation
General requirements
Important!
All electrical work shall be carried out by a
competent person and shall comply with
BS7671 (IEE Regulations).
The boiler is supplied for connection to 230 V, ~ 50 Hz
supply fused at 3 A rating.
Connection to the mains supply shall be made via a
fused 3 pin plug to an unswitched shuttered socket,
both complying to the requirements of BS1363.
(Alternatively, connection may be made via a 3 A fused
double pole isolator having a contact separation of at
least 3 mm in all poles and supplying the boiler and controls only).
The point of connection to the mains supply must allow
complete electrical isolation of the boiler and its ancillary controls. It should be readily accessible and adjacent to the boiler. A 3 core flexible cord according to
BS6500 tables 6, 8 or 16 (3 x 0.75 to 3 x 1.5 mm2)
should be used.
3
NL987543
RT 24V 230V RT 230V
Fig. 5.9: Wiring system
Warning!
This appliance must be earthed.
Important!
Ensure that all cords pass through the cable
clamps in the rear of the control box and are
securely fixed. Ensure that the power supply is
connected such that the current carrying conductors become taut before the earth conductor
should the supply cord slip from the cable
clamp.
Warning!
Mains connection terminals L and N remain live
even when the boiler on/off control is switched
off.
5.12 Connection to the main supply
• Lower the control panel.
• Unclip the terminal box cover (1) from the control
panel (2).
• Feed the power supply cord in to the appliance as
shown (fig 5.9).
• Use cable clamps.
Fig. 5.10: Exposed rear view of switchgear cabinet
• Connect the power supply cord as follows (Fig. 5.11).
Green/yellow (earth) wire: boiler terminal Earth sign
Blue (neutral) wire: boiler terminal N
Brown (live) wire: boiler terminal L
Note!
DO NOT use boiler terminal connections 7-8-9.
• Refit the terminal box cover by pushing into place
until it clips back into position.
• Raise the control panel and secure in place.
Instructions for Installation and Servicing turboMAX pro R316
NL987
F3
543
24V
230V
F1
5.13 Electronic board layout
Boiler Installation Sequence 5
Socket X2 for internal unit components
Socket X4 for minority reversing
Socket X7 for accessory box connection
Do not
use!
Socket X8 for VRC-VC connection
Mains power supply: connections L, N and earth
Room thermostat, 230 V: connections 3, 4 and 5
Socket X12: pump connection
Socket X14: gas valve connection
Abb. 0.0 Bildunterschrift
Fig. 5.11 Connection wiring
Instructions for Installation and Servicing turboMAX pro R3 17
Socket X13: fan unit connection
5 Boiler Installation Sequence
LN
234
LN 3
4
1
ACL Drayton
Tempus 1, Tempus 2
Lyfestyle LP111, LP711
ACL Drayton
Switchmaster
SM300
ACL Drayton
Switchmaster 980
Danfoss Randall
103 Series
Danfoss Randall
Set 1E, TS975
Danfoss Randall
TS715
Grässlin Towerchron
QE1, QM1
Honeywell
ST610A, ST6100C
Horstmann
Channel Plus
H11, H17, 425 Coronet
Horstmann
Centaur Plus
C11, C17
LN
234
LN 4
3
1
Potterton Myson
EP 4002, EP 5002
Smiths Timeguard
SupplyMASTER
FST11, FST17
Sunvic
Select 107
N1
AB C
N4
2
L
L
3
34
12
65E
4L3
N
3
E
NE
234
NE
1
L
L
3
56
4
LN
234
LN 3
4
1
LN
234
LN 3
4
1
LN
234
LN 3
4
1
NE
234
NE
1
L
L
3
56
4
NE
234
NE
1
L
L
3
4
LN
234
LN 3
4
1
LN
234
LN 3
4
1
AB
DLN
LN
C
N
E
3
12
4
345E
12
4
432/L
1/N
3
65
mains supply
LN E
E
Landis & Staefa
RWB7, RWB30
LN
234
LN 3
4
1
ACL Drayton
Lyfestyle PT271, PT371
ACL Drayton
Digistat 2, 3, 4
ACL Drayton
Digistat RF - SCR Receiver
Danfoss Randall
TP4, TP5, TP5E
Danfoss Randall
TP5E RF with receiver RX1
Danfoss Randall
TP75
Grässlin Towerchron
RTC7
Honeywell
CM61, CM67, CM31, CM37
Horstmann
Centaurstat 1, 7
Landis & Staefa
REV 11, REV 15, REV 22
12
34
3
Sunvic
TLX 6501
Sunvic
TLX RFP, TLX RFD
Vaillant
VRT 230, 220
N1
3
N3
2
L
L
4
32
43
1
LN
234
LN 3
4
1
BC
2341
A
3
56
4
12
34
3
AB
34
C
12
4
34
3
LL1
34
Smiths Timeguard
ProgramaSTAT PRT11, PRT17
LN
4
LN
3
34
12
34
3
LN
234
LN 3
4
1
3
45
5.14 Controls
External electrical controls
The boiler terminals 3, 4 and 5 are for connecting
external electrical controls such as a time switch and/or
room thermostat. Terminals 3 and 4 are linked together
when the boiler is supplied. If external controls are used,
this link must be removed, and the controls connected
across terminals 3 and 4.
Terminal 5 is an additional neutral connection for external neutrals such as from the anticipator of a room
thermostat.
Connection of external controls
Connection details for programmable room
thermostats.
Fig. I.12 shows the connection details where a programmable room thermostat (time switch with built in
room thermostat) is used to control the boiler.
Attention!
The arrowed numbers indicate connection into
the relevant terminal in the boiler terminal strip.
Connection details for external time switches and
boiler terminal strip.
Fig. 5.13 shows the connection details where a time
switch is used without a room thermostat to control the
boiler.
Attention!
The arrowed numbers indicate connection into
the relevant terminal in the boiler terminal strip.
If a room thermostat is to be connected in addition to a
time switch the wire between the time switch „ON“ terminal and boiler terminal 4 should be broken by the
contacts of the room thermostat (see schematic layout,
Fig. 5.14).
Vaillant optional plug in timer accessories
Refer to the instructions supplied with the optional
accessories for connection details.
Upon completion of all electrical connections refit the
terminal box cover by pushing into place. The cover is
secured by two locking clips.
Fig. 5.12 Connection details for programmable thermostats
Fig. 5.13 Connection details for time switch
Instructions for Installation and Servicing turboMAX pro R318
Fig. 5.14
3
987
MAINS
SUPPLY
230 V
50 Hz
L
L
LN
N
N
N
20 VDCDO NOT USE IN UK!
3 A FUSE
SWITCH
CONTACTS
ROOM
THERMOSTAT
CLOCK
4
5
Thermostatic radiator valves
The boiler has a built in automatic bypass valve making
it ideal for use in systems with thermostatic radiator valves (no separate system bypass is required).
For optimum fuel economy it is recommended that
where TRV’s are used they are used in conjunction with
a programmable room thermostat or separate timer and
room thermostat to ensure complete boiler shut down
when the heating demand is satisfied. (The radiator in
the room containing the room thermostat should not be
fitted with a TRV).
Boiler Installation Sequence 5
Automatic pump spin control (APS)
The boiler incorporates a built in control which will spin
the built in circulating pump and operate the diverter
valve (turboMAX only) once in a 24 hour period. This
control helps to prevent seizure when the boiler is not
operated for a period of time. This control is not active
when the power supply to the appliance is turned off.
Frost protection
The boiler has an integral frost thermostat which is designed for protection of the boiler.To protect remote or
exposed parts of the heating system or property additional frost protection measures must be taken such as the
installation of an external frost thermostat. This frost
thermostat should be connected across the boiler terminals 3 and 4, in parallel with any external heating controls. External frost protection cannot be used when
plug in timers have been fitted.
Circulating pump
The boiler incorporates a built in circulating pump that
is fully prewired (no additional wiring is necessary). The
pump incorporates an automatic overrun period after
the boiler switches off.
Anti-cycling ‘economiser’ control
The boiler incorporates a built in anti-cycling control to
ensure that energy wasteful short cycling of the boiler
cannot occur. This control prevents the boiler from reigniting for a preset period of 5 minutes after central
heating operation (the hot water operation is unaffected
by this control and hot water can be drawn at any time).
Note!
To temporarily override the anti-cycling control
turn the main boiler on/off switch to the off
position „0“ and then back to the on position
„I“ after a few seconds.
Instructions for Installation and Servicing turboMAX pro R3 19
6 Commissioning Part I
2
5
3
4
1
6 Commissioning Part I
6.1 Preliminary electrical checks
Check the electrical installation by carrying out short
circuit, earth continuity and resistance to earth tests
and a check for correct polarity.
6.2 Gas supply
The complete gas installation including the gas meter
must be inspected, tested for soundness and purged in
accordance with BS 6891.
The gas supply to the boiler can be purged by slackening the gas service valve beneath the boiler. Ensure
that there is adequate ventilation, extinguish all naked
flames and do not smoke whilst purging.
After purging, the gas service valve connection must be
retightened and tested for soundness. (The boiler itself
does not require purging as this will be done by the
automatic burner sequence control).
6.3 Cold water supply
Open all domestic hot water taps supplied by the boiler,
turn on the mains water supply to the boiler and open
the mains water isolating valve below the boiler.
Water will now flow through the boiler to the hot taps.
Starting with the lowest tap supplied, turn the hot taps
off one at a time until the hot water pipework is purged
of air. Check all hot and cold water pipework for leaks.
6.4 Filling the heating system
Proceed as follows to fill the system:
• Open all radiator valves on the system.
• Fill the system via the seperate filling point.
• Open the valve slowly and fill the unit with water until
the required pressure has been acheived (2).
• Bleed the air from the radiators.
• The boiler is equipped with an automatic air release
valve. To allow this to vent the boiler, the cap top must
be slackened by 1 - 2 turns. (This cap must be left
slackened during operation to ensure any residual air
or system gases are released).
• Close the filling valve (1) and disconnect the temporary
connection.
• Now check the water pressure in the unit again (and
add more water if necessary).
6.5 Initial system flush (“cold“)
The whole of the heating system must be flushed out at
least twice: once cold, and once hot as instructed later.
Open all radiator and heating valves and the boiler CH
service valves and drain the heating system and boiler
completely from the lowest points of the system via 1/2”
BSP drain taps (opened full bore to remove any installation debris prior to lighting the boiler).
Refill the heating system. Check the operation of the
pressure relief valve by rotating the knob on the valve.
Now check the water pressure in the unit again (and add
more water if necessary).
Fig. 6.1: Filling / draining the heating system
Close the filling valve (1) and disconnect the temporary
connection.
Instructions for Installation and Servicing turboMAX pro R320
Gas supply adjustments (Commissioning Part II) 7
1
1
2
1
1a
2
2a
7 Gas supply adjustments
7.1 Gas inlet working pressure
To check the gas inlet working pressure:
• Lower the front panel of the boiler.
• Lower the control panel.
• Slacken the sealing screw (1) located at measuring
point ”P.IN”.
• Attach U-gauge to the inlet test point on the gas valve
(2).
• Ensure that the gas service valve is open.
• Set the DHW temperature control to maximum and
fire the boiler at full rate by opening a hot water tap.
• Ensure that the hot water outlet temperature
adjustment control is set to maximum.
• Check that the U-gauge is reading in the range of 18 to
20 mbar. (If the pressure is not within this range this
should be investigated before continuing with the
commissioning preocedure.
(Lower pressures than this range are indicative of an
incorrectly sized or partially blocked gas supply.)
• Turn off the hot tap.
• Remove U-gauge, tighten test point sealing screw (1).
• Test for soundness.
• Record appliance working gas inlet pressure (mbar) in
the Benchmark gas boiler commissioning checklist.
7.2 Main burner pressure
The burner pressure on this appliance has been factory
set and does not require adjustment. To check the main
burner pressure connect the U-Gauge as follows depending on the gas type.
• Remove front case and combustion chamber cover.
Note!
All measurements and adjustments to the gas
valve must be done with the combustion chamber cover removed.
For natural gas appliances:
• Slacken the sealing screw (1) at test point on the gas
valve and attach one arm of a U-gauge (2) to the test
point.
For LPG appliances:
• Slacken the sealing screw (1a) at test point on the burner inlet gas pipe and attach one arm of a U-gauge
(2a) to the test point.
Connection for Natural gas
Fig. 7.1: Gas inlet working pressure
Connection for LPG
Fig. 7.2
Instructions for Installation and Servicing turboMAX pro R3 21
7 Gas supply adjustments (Commissioning Part II)
1
+
-
2
Set the DHW temperature control to maximum and fire
the boiler at full rate by fully opening a hot water tap.
Check that the burner pressure is as the maximum
shown in table 7.1.
Measure the domestic hot water mode burner operating
pressure (mbar), the heat input (kW), the inlet and outlet
domestic hot water temperatures (°C) and flow rate
(l/min) and record details in the boiler logbook.
After completion of all tests tighten sealing screw,
replace the sealing plug and check all test points for
soundness (1/1a).
7.3 Adjusting the central heating output (range
rating)
The boilers are fully modulating for central heating, and
it is therefore not necessary to range rate the boiler.
However, if desired, it is possible to range rate the boiler,
as follows:
• Connect the U-gauge to check burner pressure.
• Use Table 7.1 on to determine the central heating
output required.
• Identify required range rating setting and note main
burner pressure in mbar for that output.
• Turn on the central heating.
• Turn the central heating maximum radiator tempera-
ture control to its highest setting.
• Ensure that any thermostatic radiator valves are open
and set to high.
• Wait for approx. 2 minutes until the burner pressure
switches to full load.
• The central heating output can now be altered by ins-
erting an electricans screwdriver into the
potentiometer (2).
• Turn the potentiometer fully anticlockwise.
• Slowly turn the potentiometer clockwise, whilst
observing the U-gauge.
• Stop turning the potentiometer when the burner pres-
sure is at the correct setting for the output required.
• Turn off the hot tap.
• Remove U-gauge, tighten test point sealing screw (1).
• Reassemble the boiler.
• Refit plastic plug in chamber sensing tube.
• Carry out all safety checks as detailed in these
instructions.
• Record central heating operating pressure in the
Benchmark gas boiler commissioning checklist along
with the heat input (kW) and temperature difference
between flow and return.
Fig. 7.3: Adjusting the central heating output
Note!
This illustration shows the U-tube pressure
gauge connected to a system configured to run
on natural gas. When connecting the U-tube
pressure gauge to a system running on LPG,
please refer to Fig. 7.2 on page 21.
Attention!
DO NOT open any hot water tap while carrying
out this procedure (turboMAX plus only).
Instructions for Installation and Servicing turboMAX pro R322
Gas supply adjustments (Commissioning Part II) 7
7.4 Burner Pressure and gas rate
Burner Pressure turboMAX pro 24/2 E
Delivered gas Output[kW] Ignition rate 8.9 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
Natural gas 2H Burner pressure1)[mbar]
Main burner jet mark
2)
for G20
7 / 120
LPG 3+
Main burner jet mark
2)
Burner pressure1)[mbar]
for G30 3.9 3.9 4.9 6.9 9.2 11.8 14.7 17.8 21.1 24.7
7 / 072 for G31 5.4 5.4 6.7 9.4 12.5 16.0 19.8 24.0 28.5 33.3
Burner Pressure turboMAX pro 28/2 E
Delivered gas Output[kW] Ignition rate 10.4 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0
Natural gas 2H Burner pressure1)[mbar]
Main burner jet mark
7 / 120
LPG 3+
Main burner jet mark
7 / 072 for G31 5.3 5.3 6.9 9.3 11.9 14.8 18.0 21.4 25.1 29.0 33.1
2)
for G20
Burner pressure1)[mbar]
2)
for G30 3.8 3.8 5.0 6.7 8.7 10.8 13.1 15.6 18.3 21.2 24.2
1.9 1.9 2.1 2 .9 3.7 4.7 5.8 6.7 8.4 9.8
1.8 1.8 2.3 3.0 3.9 4.8 5.8 6.8 8.0 9.2 10.5
Table 7.1 Burner pressure
1) 15 °C, 1013mbar, dry
2) The nozzles are stamped with the mark shown in this table.
The marking corresponds to the nozzle hole diameter multiplied by 100
Gas Rate turboMAX pro 24/2 E
Delivered gas Output[kW] 8.9 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
Natural gas 2H Gas Rate1)[m3/h]
Main burner jet mark
2)
for G20
1.1 1.2 1.4 1.7 1.9 2.1 2.4 2.6 2.8
7 / 120
Gas Rate turboMAX pro 28/2 E
Delivered gas Output[kW] 10.4 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0
Natural gas 2H Gas Rate1)[m3/h]
Main burner jet mark
7 / 120
2)
per G20
1.3 1.5 1.7 1.9 2.1 2.4 2.6 2.8 3.1 3.3
Table 7.2 Gas flow rate
1) 15 °C, 1013mbar, dry
2) The nozzles are stamped with the mark shown in this table.
The marking corresponds to the nozzle hole diameter multiplied by 100
Instructions for Installation and Servicing turboMAX pro R3 23
7 Gas supply adjustments (Commissioning Part II)
1
I
0
I
0
90°
90°
3
2
7.5 Fit combustion chamber cover
Carefully re-fit the combustion chamber cover to the
boiler ensuring it is correctly sealed. Secure cover with
retaining clamps.
7.6 Fit boiler casing
• Carefully push case (1) onto the boiler such that the
locating points either side at the top of the boiler
engage. Push the casing onto the securing clips at the
bottom of the boiler.
• Close control panel (2).
• Secure control panel by turning both securing fasten-
ers (3) clockwise by 90°.
Fig. 7.4: Fit boiler casing
Instructions for Installation and Servicing turboMAX pro R324
Functional Checks (Commissioning Part III) 8
I
0
I
0
1
2
3
4
5
67
8 Functional Checks
8.1 Functional checks
Procedure
Once the unit has been installed and the gas supply has
been checked, operate the system to ensure that it is
working correctly.
• Operate the system, following the operating instruc-
tions supplied with the boiler.
• Check the system for water leaks and escaping gas.
• Check that the flue has been correctly installed,
according to the fitting instructions supplied with the
flue assembly.
• Check the burner for correct ignition and flame
picture.
• Check the hot water system for correct operation.
• Check the heating system for correct operation.
• By illuminating in this sequence the indicator lights
have demonstrated correct operation of the boiler for
DHW.
Note!
Should the boiler fail to light it will attempt 2
re-ignition sequences, if the boiler still fails to
light the burner lock out indicator will
illuminate (7). This usually means that the gas
supply is turned off or has not been purged of
air. Check the gas supply, push the reset button
and repeat the lightning procedure.
Fig. 8.2 Functional check
Heating system
• Ensure that the power on indicator is illuminated (1).
Fig. 8.1 Test for correct functioning
• Ensure that the maximum radiator temperature
control is turned to the high position.
8.2 Functional check of operation
The Vaillant turboMAX pro is equipped with a set of diagnostic indicator lights to show the operational
status of the boiler.
A functional check of DHW and CH operation can be
made using these indicator lights.
• Ensure external controls are calling for heat.
• The central heating demand indicator will illuminate
(3).
• Providing the boiler has not achieved its set
temperature, and the anti-cycling control is not
activated, the boiler will start its lighting sequence.
Once the fan and flue system have proved their satis-
Hot water system
• Ensure that the power on indicator (1) is illuminated.
• Turn on a hot top and draw water at a high rate.
• The hot water demand indicator (2) will illuminate.
• The appliance will start its lighting sequence. Once
the fan and flue system has proved itself, the fan operation indicator (4) will light.
• The gas valve will open and sparking will commence
at the burner. The ignition indicator (5) will illuminate.
• As soon as the burner has ignited and the flame has
factory operation the fan operation indicator (4) will
light.
• The gas valve will open and sparking will commence
at the burner. The ignition indicator (5) will illuminate.
• As soon as the burner has ignited and the flame has
been sensed the flame indicator (6) will illuminate.
• By illuminating in this sequence the indicator lights
have demonstrated correct operation of the boiler for
CH.
been sensed the flame indicator (6) will illuminate.
Instructions for Installation and Servicing turboMAX pro R3 25
8 Functional Checks (Commissioning Part III)
1
Further information can be obtained from Sentinel,
8.3 Adjusting pump speed
The unit is fitted with a two-speed pump. The pump is
delivered with the switch (1) set to position III.
Attention!
Important note:
The boiler should only be operated at pump setting III because the heating capacity for hot
water is reduced when operated at pump
setting II!
It is possible, however, to change the pump setting from
Level III to Level II manually when there is noise coming
from the heating system.
GE Betz. Widnes, Cheshire, WA8 8UD.
Tel: 0151 420 9595
• Disconnect the temporary filling connection.
• Refit the boiler casing.
• Attach the bottom cover to the boiler by securing with
the four screws provided. It may be necessary to
apapt the bottom cover by removing the easy break
sections.
8.4 Handing over to the user
• Set the maximum radiator temperature control to the
desired setting.
• Set the maximum hot water temperature control to
the desired setting.
• Instruct the user in the safe and efficient operation of
the boiler, in particular the function of:
- The boiler on/off control
- The maximum radiator temperature control
- The maximum hot water temperature control
- The pressure gauge
Fig. 8.3: Pump speed
Final system flush („HOT“)
• Turn on the boiler for central heating and allow the
boiler and system to reach operating temperature.
• Check that the heating system is watertight.
• Turn the boiler off and rapidly drain both boiler and
system while still hot.
• Refill the system and release all air. Release water
from the system until the system design pressure of
1.0 bar is attained.
(The actual reading on the pressure gauge should ideally be 0.5 bar plus an additional pressure corresponding
to the highest point of the system above the base of the
boiler - 10 m head equals an additional 1 bar reading on
the pressure gauge. The minimum pressure should not
be less than 1 bar in any installation.)
If the system is to be treated with an inhibitor it should
be applied at this stage in accordance with the manufacturers instructions.
• Show the user how to operate any external controls.
• Explain to the user the importance of having the boiler regularly serviced by a competent servicing company. To ensure regular servicing, it is strongly recommended that arrangements are made for a
Maintenance Agreement. Please contact Vaillant
Service Solutions (0870 6060 777) for further details.
• Ensure the Benchmark gas boiler commissioning
checklist is fully completed.
Failure to install and commission this appliance to the
manufacturers instructions may invaludate the warranty (Note: This does not affect your statutory
rights).
• Leave the user instructions in the clips provided in the
front panel of the boiler.
• Leave the installation and servicing instructions with
the user.
Note!
When you have finished the installation, attach
the sticker supplied (835593) to the appliance
in the user’s language.
Attention!
The device may only be used
• for initial operation
• for testing
• for continuous operation
with the chamber cover closed and with the flue
system fully mounted and sealed.
Instructions for Installation and Servicing turboMAX pro R326
9 Servicing
9.1 Initial Inspection
To ensure the continued safe and efficient operation of
the boiler it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of
servicing will depend upon the particular installation
conditions and usage, but in general once per year
should be adequate. It is the law that all servicing work
is carried out by a competent person (Corgi registered).
Important!
Before starting any maintenance work:
• Isolate the mains electricity supply by disconnecting
the plug at the socket outlet (if there is only an isolating switch remove the fuse from the switch).
• Turn OFF the gas supply at the gas service valve fitted
to the boiler.
• Always test for gas soundness and always carry out
functional checks after any service work and after
exchanging any gas carrying component.
• Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after exchanging any electrical component.
Servicing 9
Note!
The boiler is fitted with a combustion analysis
test point. A suitable combustion analyser can
be connected to this point to establish the combustion performance of the boiler.
Before commencing any servicing or maintenance work,
carry out an initial inspection of the system as follows:
• Inspect the flue, pipework and electrical connections
for indications of damage or deterioration.
• Inspect the air supply and ventilation arrangements of
the installation.
• Check the heating and water system, in particular the
condition of radiator valves, evidence of leakage from
the heating system and dripping hot water taps.
Functional check of boiler operation
• Carry out a functional check of the boiler operation as
prevoiusly detailed.
• Remove the appliance casing as detailed and operate
the boiler by fully opening a hot water tap. Inspect the
burner operation through the viewing window. Check
that the flames are evenly covering the surface of the
burner. Inspect for signs of excessive flame lift or sooting.
Instructions for Installation and Servicing turboMAX pro R3 27
9 Servicing
6a
6b
7
9
10
8
2
1
5
5
4
6c
9.2 Cleaning the burner and primary heat exchanger
• Turn off the boiler.
• Isolate the electrical supply to the boiler.
• Remove the boiler case as described.
• Turn off the gas service valve.
• Turn off the boiler CH service valves.
• Turn off the cold water inlet service valve.
• Release the three clamps (1), remove the combustion
chamber cover (2).
• Pull the three cables (4) and two tubes (5) from the
fan assembly.
• Remove the fan assembly (6a, 6b, 6c).
• Remove the four screws (7) and detach the front
cover panel from the combustion chamber (8).
• Check the burner (9) and heat exchanger fins (10) and
remove any loose deposits with a soft brush.
• Reassemble in reverse order.
• Check central heating expansion vessel.
Note!
It is not necessary to carry out this check
every year – a check every three years should
be sufficient.
• Release the system water pressure from the boiler.
• Remove valve cap from expansion vessel charge point.
• Check that the internal charge pressure of expansion
vessel is between 0.7 - 0.9 bar. If pressure is lower
than this the vessel should be re-pressurised using an
air pump.
• Refit valve cap.
• Open central heating service valves and re-pressurise
the boiler and heating system if necessary.
• Open the gas service valve.
• Turn on the mains power supply.
• Operate the boiler and carry out soundness, safety
and function checks.
• Complete the service interval record section in the
Benchmark gas boiler commissioning checklist.
Fig. 9.1 Cleaning the burner and primary heat exchanger
Instructions for Installation and Servicing turboMAX pro R328
Fault Finding 10
10 Fault Finding
10.1 Introduction
The turboMAX pro has built in diagnostic indicator lights
to assist you with fault finding in the unlikely event of a
boiler malfunction. The lights will illuminate in sequence,
indicating the operational status of the boiler. Should a
fault develop in the boiler the indicators may flash highlighting the possible fault e.g.
Power on indicator (green)
Illuminates when the electricity supply to the boiler is
on, the main on/off control is set to position (I) and the
internal boiler fuses are o.k.
(A flashing indicator shows that the overheat thermostat has cut out.)
Hot water demand indicator (yellow)
Illuminates whenever there is a demand for hot water
i.e. a hot water tap is opened.
Central heating demand indicator (yellow)
Illuminates whenever there is a demand for central heating i.e. the radiator temperature control is turned on
and the external heating controls are calling for heat.
Note!
If the external controls are not calling for heat
(i.e. the room thermostat has reached
temperature) this indicator will go out. This is
perfectly normal.
To reset the appliance after a lockout (either burner
lockout illuminated or any other indicator light flashing), turn the central heating control to the reset position and release.
10.2 Logical fault finding procedure
Preliminary Checks
These checks must be carried out before attempting to
use the fault finding guide:
1) Carry out electrical safety checks.
2)Check that the external electricity supply to the boiler
is on, and a supply of 230 V~ is present
between boiler terminals „L“ and „N“.
3)Check that gas supply to the boiler is on and that it
has been correctly purged.
4)Ensure the heating system is full of water and charged
to approx. 1 bar. If not refill the system and vent
system. Ensure boiler flow and return service valves
are open.
5)Check that boiler main on/off control is set to position
(I)
6)Ensure that the Maximum Radiator Temperature and
Maximum Hot Water Temperature controls are set to
high position.
7)Check that all the external controls are on and calling
for heat (if no external controls are fitted, boiler terminals 3 and 4 must be linked). Check that boiler anticycling „economiser“ control is not engaged.
Procedure
Fan operation indicator (yellow)
Illuminates to indicate that the fan is operating and has
been checked by the fan pressure switch.
(A flashing indicator shows that the air pressure switch
has not made.)
Ignition indicator (yellow)
Illuminates when gas valve, operator and ignition transformer are energised. This indicator remains on during
burner operation.
(A flashing indicator shows lack of water or poor water
circulation in central heating system.)
Flame indicator (yellow)
Illuminates when flame is recognised by the flame monitoring system.
(A flashing indicator shows that an NTC sensor is broken, not connected or shorted to earth.)
Burner lockout indicator (red)
Illuminates if the burner fails to light within 10 seconds
of illumination of the ignition indicator after the 3rd ignition cycle.
(A flashing indicator shows a failure in the electronic
boards.)
Note!
Always check the operation of the boiler for
central heating first before checking hot water
operation. Do not open a hot tap unless
instructed to by the fault finding guide.
Instructions for Installation and Servicing turboMAX pro R3 29
10 Fault Finding
Ensure boiler main
ON/OFF control is set
to position "1"
Ye s Go to sheet C
Check electrical supply, appliance fuses and on/off control
No
Is 230VAC present across
terminals L and N?
Ye s
Is 230VAC present across
terminals 3 and 5?
Ye s
Is voltage between
16-26 VDC present across
terminals 8 and 9?
Ye s
Is 5 VDC present between
5V and GND test points
on electronic board?
Replace LCD display
Ye s
NoRepair external fault
Is the continuity
across fuse F1?
Go to sheet B
Does ON/OFF knob
operate switch on
electronic board
Boiler ON/OFF control
defective,
change electronic
board
Replace switch
mechanism
No
No
No
Ye s
Ye s
Note 1:
For test purposes, disconnect
external controls from terminal
3 - 4 and replace with a bridge
between these terminals.
It appliance then operates, the
fault is with the external controls.
Sheet A
Is there continuity
across fuse F3?
No
No
Replace electronic
board
No
Check transformer
Replace if
necessary
Ye s
Does green power on
indicator glow?
Instructions for Installation and Servicing turboMAX pro R330
Instructions for Installation and Servicing turboMAX pro R3 31
Sheet BCheck operation of pump and fan
Turn off the main ON/OFF control to the
"0" position
Diconnect the power supply to the boiler
Go to sheet A
Check transformer 230 VAC primary
(black/red) and approx. 17 VDC secondary
(blue/brown)
Check/replace pump
Replace fuse F1
If fan commences operation, exchange
gas valve
After approx. 20 secs.
Does fuse F1 blow?
Produce central heating demand.
Does fuse blow immediately?
Turn the main ON/OFF control to the "1"
position
Does green power on indicator glow?
Ye s
No
No
No
Ye s
Check/replace fan Replace electronic board
No
Ye s
Ye s
Does green power on indicator glow?
Fault Finding 10
10 Fault Finding
Check central heating and controls
Ensure that radiator temperature control knob
is set to vertical position and that any internal
timer (if fitted) is calling for heat
No
Is 230 VAC present across terminals 4 and 5
No
External fault: Check all external controls are
calling for heat, replace or repair as necessary
(see also note 1 sheet A)
Ye s
Ye s Disconnect built in timer (if fitted)
No Go to sheet D
Does ignition
commence?
No
Ye s
Replace defective
timer
Sheet C
Does yellow central heating demand
indicator glow?
Does yellow flame indicator flash?
Instructions for Installation and Servicing turboMAX pro R332
Instructions for Installation and Servicing turboMAX pro R3 33
Does fan run after approx. 30 secs.?
Check flue and ignition system
No
Check pitot tube (in fan outlet) and air
hoses are not obstructed and correctly
aligned.
Check or replace air pressure switch.
Does the fan run now?
Is 230 VAC present across fan
terminals?
Replace electronic board
Ye s
No
No
Ye s
No
Ye s
Ye s Check/replace fan
Does the boiler
commence ignition
Check air/flue gas system
is correctly fitted and not
obstructed
Ye s
No
Replace electronic board
No
Ye s
Are electrodes sparking at
the burner?
Ye s Go to sheet E
No
Check electrodes and
electrode leads.
Replace as necessary.
Sheet D
Does yellow fan operation
indicator glow?
Does yellow fan
operation indicator flash?
Fault Finding 10
10 Fault Finding
Check gas valve and central heating system pressure
Does burner light 1st
attempt?
Does burner light within 3
ignition attempts?
No
Ye s
Check gas supply
Does burner light?
Ye s
Check burner pressure
settings are correct
Ye s
No Reset boiler
No
Check/replace gas valve
as necessary and
Does burner light?
No
Replace electronic board
Ye s
Is burner indicator
illuminated?
No
Check flame
rectification lead and
electrode
Is burner indicator
illuminated
No
Ye s
Does burner shut down after
approx. 15 secs.
No Go to sheet F
Ye s
Check water pressure in
central heating system, refill
and vent. as necessary
Check pump is running?
Ye s
Ye s Replace pump
No
Is 230 VAC present at the
pump plug connection?
No
Replace electronic board
Sheet E
Does yellow ignition indicator flash?
check water pressure
Instructions for Installation and Servicing turboMAX pro R334
Instructions for Installation and Servicing turboMAX pro R3 35
Does flame indicator glow and
flames increase in size to full gas
rate after approx. 2 mins?
Ye s
Does burner flame modulate/ go
out when radiator temperature
control is turned left to the
horizontal position at flow
temperature of approx. 50 C?
Ye s
Does heating flow pipe
temperature rise?
Go to sheet GYe s
Check operation of burner and modulation
Ensure flow and return service
valves are open
No
No
No
Replace electronic board
No
Check operation of boiler in DHW
mode, does flame increase in size
to full rate?
Ye s
Check partial load
setting
No
No
Go to sheet G
Ye s
Check connections and
modulatior, replace gas valve if
burner still fails to increase to full
rate
Turn main ON/OFF control to
the "0" position
Ye s
Insert a small screwdriver
through the hole in the front of
the diverter valve and hold
blade lightly against spindle
Turn "ON" the main ON/OFF
control
Does spindle move?
Ye s
Replace electronic board
Replace diverter valve
No
Sheet F
Does yellow hot water
demand indicator glow?
Fault Finding 10
10 Fault Finding
Draw hot water at high rate
Ye s
Check hot water flow rate and temperature.
Compare with technical data, if flow is not
sufficient check incoming main and cold water
filter.
Normal operation carry out
electrical safety checks
No
Check cold water inlet pressure is
sufficient and that cold water inlet
filter is clear
Check cold water inlet is fully open
and adjustment is at maximum
flow rate
Check/Clear impeller in
Aquasensor, replace if necessary
Check/replace hall sensor
Replace electronic board
Does hot water indicator
glow/flash now?
No
No
Ye s
Ye s
No
Sheet G
No
Check D.H.W operation
Does yellow hot water
demand indicator glow?
Does yellow hot water
demand indicator glow now?
Does yellow hot water
demand indicator glow now?
Instructions for Installation and Servicing turboMAX pro R336
power supply
F2A
L
2
N
1
main switch
main
transformer
230V
20V
air
pressure
switch
fan
pump
NTC flow
temperature
sensor
flame
sensor
gas
valve
aqua
sensor
F1,25A
NTC return
temperature
sensor
Burner lock out
indicator (red)
Hot water demand
indicator
Central heating
demand indicator
Fan operation
indicator
Ignition indicator
Flame indicator
Power on indicator
(green)
main switchboard
ignition
electrodes
Legend
b blue
br brown
y/g yellow/green
rred
p pink
t transparent
bl black
gr grey
w white
gr
b
br
y/g
bbr
y/g
br
t
w
p
t
br
br
r
b
br
y/g
Reset button
gr
p
p
r
control box
diverter
valve
bl
bl
bl
bl
wps
11.1 Functional Flow diagram: turboMAX pro 24 E and 28 E
Diagrams 11
Instructions for Installation and Servicing turboMAX pro R3 37
11 Diagrams
Switchgear cabinet
U100
X3
T 2
= F2
T 1,25
= F3
X2
X2
X1
24
23
11213
14
15
16
17
18
19
20
21
22
2
3
4
5
6
7
8
9
10
11
X6
Diagnosis
X2
Aqua
sensor
Pressure sensor
NTC return
NTC
earth
Ionisation
electrode
Coding resistor
NTC flow
NTC return
Lifting magnet
24
23
11213
14
15
16
17
18
19
20
21
22
2
3
4
5
6
7
8
9
10
11
Fan unit
Ignition
electrodes
Gas valveDiverter valveAir pressure switch
Ionisation
electrode
Pump
Aqua
sensor
NTC flow
NTC return
X8X4 (VUV)
X12
X14 X13
97 L 48N35
1234
EV1
Water pressure switch
11.2. Wiring diagram: turboMAX pro 24 E, 28 E
Instructions for Installation and Servicing turboMAX pro R338
833792_42 GB R3 03 2005 Subject to alteration
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