State Water Heaters SCE 80-115 Troubleshooting guide

Installation
User and
Service Manual
80-115
80-140
80-180
95-199
95-260
70-360
65-400
65-500
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your installer

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Warning
Read this manual carefully before starting to use the waterheater. Failure to
read this manual and to follow the instructions in this manual may lead to
accidents and injury to persons and damage to the appliance.
Copyright
Copyright 2003 State Water Heaters
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by
means of printing, photocopying or by whatsoever means, without the prior
written approval of State Water Heaters.
State Water Heaters reserves the right to alter the specifications as set out in
this manual.
Trademarks
All brand names stated in this manual are registered trademarks of the suppliers
in question.
Liability
State Water Heaters is not liable for claims made by third parties caused by
improper use other than that stated in this manual and in accordance with the
General Conditions submitted to the Eindhoven Chamber of Commerce.
See also the General Conditions. These are obtainable from us free of charge.
Although a great deal of care is given to ensuring correct and where necessary,
a full description of the relevant components, it may occur that the manual
contains errors and ambiguities.
Should you actually find any such errors or ambiguities in the manual, then we
would be pleased to hear from you. This helps us to further improve our
documentation.
More information
If you have any comments or queries concerning specific components relating
to the appliance, then please do not hesitate to contact State Water Heaters.
Aqua State Sales
Orchard House, 61-67 Commercial Road
Southampton SO15 1GG
Tel: [phone]
Fax: [phone]
E-mail: [email protected]k
In case of problems relating to the connections to gas, electrical and water
services, you can approach the supplier/installer of your installation.

4SCE Instruction Manual

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Table of contents
1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.2 What to do in the case of gas smell- - - - - - - - - - - - - - - - - - - - - 9
1.3 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.4 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
1.5 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10
1.6 Forms of notation - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11
1.7 Overview of this document - - - - - - - - - - - - - - - - - - - - - - - - 11
2 Operating the appliance - - - - - - - - - - - - - - - - - - - - 13
2.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13
2.2 General operation of the appliance - - - - - - - - - - - - - - - - - - - - 14
2.3 Warm-up cycle of the appliance - - - - - - - - - - - - - - - - - - - - - 15
2.4 Protecting the appliance - - - - - - - - - - - - - - - - - - - - - - - - - 15
2.4.1 Water temperature protection - - - - - - - - - - - - - - - - - 16
2.4.2 Flue gas outlet cut-out - - - - - - - - - - - - - - - - - - - - - 16
2.4.3 Ionisation pin - - - - - - - - - - - - - - - - - - - - - - - - - 16
2.5 Safety of the installation - - - - - - - - - - - - - - - - - - - - - - - - - 16
2.5.1 Unvented installation (sealed) - - - - - - - - - - - - - - - - - 16
2.5.2 Vented installation (open) - - - - - - - - - - - - - - - - - - - 17
2.5.3 T&P valve - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 19
3.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19
3.2 Packaging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 21
3.3 Environmental conditions- - - - - - - - - - - - - - - - - - - - - - - - - 21
3.3.1 Working space - - - - - - - - - - - - - - - - - - - - - - - - 21
3.3.2 Humidity and ambient temperature- - - - - - - - - - - - - - - 21
3.3.3 Maximum floor load - - - - - - - - - - - - - - - - - - - - - - 22
3.3.4 Water composition - - - - - - - - - - - - - - - - - - - - - - 22
3.4 Technical specifications - - - - - - - - - - - - - - - - - - - - - - - - - 22
3.5 Circuit diagram- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 24
3.6 Water connections Unvented - - - - - - - - - - - - - - - - - - - - - - - 26
3.6.1 Cold water side - - - - - - - - - - - - - - - - - - - - - - - - 26
3.6.2 Shunt pipe - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.6.3 Hot water side- - - - - - - - - - - - - - - - - - - - - - - - - 26
3.6.4 Drain valve - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.6.5 Circulation pipe - - - - - - - - - - - - - - - - - - - - - - - - 27
3.7 Water connections Vented - - - - - - - - - - - - - - - - - - - - - - - - 27
3.7.1 Cold water side - - - - - - - - - - - - - - - - - - - - - - - - 27
3.7.2 Shunt pipe - - - - - - - - - - - - - - - - - - - - - - - - - - 27
3.7.3 Hot water side- - - - - - - - - - - - - - - - - - - - - - - - - 27
3.7.4 Circulation pipe - - - - - - - - - - - - - - - - - - - - - - - - 28
3.8 Gas connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 28
3.9 Flue gas outlet - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 28
3.9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - 29
3.9.2 Fitting the draught diverter - - - - - - - - - - - - - - - - - - - 29
3.9.3 Flue gas thermostat assembly - - - - - - - - - - - - - - - - - 30
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3.10 Electrical connection - - - - - - - - - - - - - - - - - - - - - - - - - - - 31
3.10.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - 31
3.10.2 Preparation- - - - - - - - - - - - - - - - - - - - - - - - - - - 31
3.10.3 Mains voltage - - - - - - - - - - - - - - - - - - - - - - - - - 32
3.10.4 Week timer circuit - - - - - - - - - - - - - - - - - - - - - - - 33
3.10.5 Extra fault sensor ('Fault output') - - - - - - - - - - - - - - - - 33
3.11 Convert to another category of gas - - - - - - - - - - - - - - - - - - - - 33
3.11.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - 34
3.11.2 Conversion to another gas category SCE 80-115 to 65-400 incl. - 34
3.11.3 Convert to another category of gas SCE 65-500- - - - - - - - - 36
3.12 Checking the supply pressure and burner pressure - - - - - - - - - - - - 38
4 Filling and draining - - - - - - - - - - - - - - - - - - - - - - - 43
4.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
4.2 Filling the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 44
4.2.1 Filling unvented installations - - - - - - - - - - - - - - - - - - 44
4.2.2 Filling vented installations- - - - - - - - - - - - - - - - - - - - 44
4.3 Draining the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - 44
4.3.1 Draining unvented installations - - - - - - - - - - - - - - - - - 44
4.3.2 Draining vented installations - - - - - - - - - - - - - - - - - - 45
5 Controls- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
5.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
5.2 Control panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
5.3 Meaning of the icons - - - - - - - - - - - - - - - - - - - - - - - - - - - 48
5.4 I/0/II switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 48
5.5 Control thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - 48
5.6 Burner controller reset button - - - - - - - - - - - - - - - - - - - - - - - 49
5.7 Week timer switching - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
5.8 Flue gas outlet cut-out reset button - - - - - - - - - - - - - - - - - - - - 50
6 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 51
6.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
6.2 Operating states - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
6.3 Power Anode Status - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
6.4 Fault states - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 52
7 Putting into and out of operation - - - - - - - - - - - - - - - - 53
7.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
7.2 Putting into operation - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
7.3 Putting out of operation - - - - - - - - - - - - - - - - - - - - - - - - - - 53
7.3.1 Put appliance out of operation for a short period ("OFF mode") - 53
7.3.2 Disconnecting the appliance from the mains- - - - - - - - - - - 53
7.3.3 Putting the appliance out of operation for a long prideful time - - 53
7.4 The appliance's warm-up cycle - - - - - - - - - - - - - - - - - - - - - - 54
8 Faults - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 55
8.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 55
8.2 Fault table for general faults - - - - - - - - - - - - - - - - - - - - - - - - 56
8.3 Fault table 'no hot water' - - - - - - - - - - - - - - - - - - - - - - - - - 58
8.4 Fault table 'insufficient hot water' - - - - - - - - - - - - - - - - - - - - - 60
9 Maintenance- - - - - - - - - - - - ------ - - - - - ---61
9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61

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9.2 Preparing for maintenance - - - - - - - - - - - - - - - - - - - - - - - - 61
9.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 62
9.3.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - 62
9.3.2 Check anodes- - - - - - - - - - - - - - - - - - - - - - - - - 62
9.3.3 Descale and clean the tank - - - - - - - - - - - - - - - - - - 62
9.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 63
9.4.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - 63
9.4.2 Clean the burners - - - - - - - - - - - - - - - - - - - - - - - 63
9.4.3 Clean the injectors - - - - - - - - - - - - - - - - - - - - - - 63
9.4.4 Check flue baffles - - - - - - - - - - - - - - - - - - - - - - - 63
9.5 Completing maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 63
10 Warranty (Certificate)- - - - - - - - - - - - - - - - - - - - - - 65
10.1 Warranty general - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65
10.2 Tank warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 65
10.3 Installation and conditions of use - - - - - - - - - - - - - - - - - - - - - 65
10.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 66
10.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - 66
10.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 66
10.7 Obligations incumbent on State - - - - - - - - - - - - - - - - - - - - - 66
A Appendices- - - - - - - - - - - - - - - - - - - - - - - - - - - 67
A.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 67
A.2 Electrical diagram SCE- - - - - - - - - - - - - - - - - - - - - - - - - - 68
A.2.1 Electrical diagram SCE 65-500 LP - - - - - - - - - - - - - - - 68
A.2.2 Electrical diagram SCE - - - - - - - - - - - - - - - - - - - - 69
IX Index - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 71

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About the appliance
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1 Introduction
1.1 About the appliance This manual describes how to install, service and use an SCE-appliance. An
SCE appliance is a gas-fired open waterheater without a fan. The SCE
appliance is fitted with flue gas outlet protection and falls into the appliance
category B11BS. You can find this information on the appliance's identification
plate. The information in this manual applies in respect of types SCE: 80-115,
80-140, 80-180, 95-199, 95-260, 70-360, 65-400, 65-500.
The construction and fittings for the appliance comply with the European
standard for gas-fired storage water heaters for sanitary use (EN 89). The
appliances thus comply with the European Directive on Gas Appliances and are
therefore authorised to bear the CE mark.
Warning
Read this manual carefully before putting the waterheater into operation.
Failure to read the manual and to follow the specified instructions may lead
to personal accidents and damage occurring to the appliance.
1.2 What to do in the
case of gas smell Warning
For gas smell:
No naked flames! No smoking!
Avoid sparking! Do not use any electrical switches, so no telephones, plugs
or bells!
Close the main gas supply!
Open windows and doors!
Warn residents and leave the building!
After leaving the building, warn the gas distribution company or installer.
1.3 Regulations As the (end) user, installer or service and maintenance engineer, as a minimum
requirement you should ensure that the complete installation complies with the
local, valid:
• regulations governing building regulations;
• directives for existing gas installations drawn up by your power supplier;
• directives for natural gas installations and the associated practical
guidelines;
• safety requirements for low-voltage installations;
• regulations governing the supply of drinking water;
• regulations governing ventilation in buildings;
• regulations governing the supply of combustion air;
• regulations governing the discharge of flue gases;
• requirements in respect of installations consuming gas;
• regulations governing internal sewage inside buildings;
• regulations governing fire brigade, power companies and the municipality;
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What is more the installation should comply with the manufacturer's regulations.
nRemark
Supplements or subsequent changes and/or additions at the time of
installation shall apply in respect of all regulations, requirements and
guidelines.
1.4 Target groups The three target groups for this manual are:
• (end) users;
•installers;
• service and maintenance engineers
Symbols are shown on each page indicating for which target groups the
information is intended. See Ta ble 1.1 .
1.5 Maintenance A service should be carried out a minimum of once a year both on the water side
and on the gas side. Maintenance frequency depends, amongst other things, on
the water quality, the average burning time per day and the set water
temperature.
nRemark
To determine what the correct maintenance frequency is, it is recommended
to get the service and maintenance engineer to check the appliance on the
water and gas side three months after installation. The maintenance
frequency can be ascertained on the basis of this check.
nRemark
Regular maintenance extends the service life of the appliance.
Both the end user and the service and maintenance engineer are responsible
for regular maintenance. They will need to establish clear agreements on this.
nRemark
If the appliance is not regularly maintained, the warranty will be void.
Table 1.1 Symbols for each target group
Symbol Target groups
g(End) user
iInstaller
sService and maintenance engineer

Forms of notation
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1.6 Forms of notation The following notation is used in this manual:
nRemark
Note important message
cNote
Ignoring this text can result in the appliance being damaged.
Warning
Ignoring this text can result in seriously damaging the appliance and
hazardous personal situations.
1.7 Overview of this
document
Tab l e 1.2 provides an overview of the contents of this document.
Table 1.2 Content of document
Chapter Target groups Description
2 Operating the appliance gis This chapter describes how to operate the appliance.
3 Installation is This chapter describes the installation instructions to be
completed before you can finally put the appliance into
operation. Converting the appliance, by an installation and/or
service engineer, to other types of gas is also described here.
4 Filling and draining gis This chapter describes how to fill and drain the appliance.
5Controls gis This chapter describes the general controls on the appliance
and provides and explanation of the control panel.
6 Status of the appliance gis This chapter describes the status (state) that you might find
the appliance in, and what subsequent action is to be taken.
7 Putting into and out of
operation gis This chapter describes how to put the appliance into operation
and how to put the appliance out of operation for a short or
lengthy period of time. The general warm-up cycle of the
appliance is also described here.
8 Faults gis This chapter is mainly intended for the installer and the service
and maintenance engineer. It describes appliance faults.
These faults are shown on the display. The possible cause
and solution are given in tabular format. However, an end user
can also find out additional information about the appliance
here.
9 Carrying out
maintenance sThis chapter describes the maintenance to be provided.
10 Warranty (Certificate) gis This chapter provides the warranty conditions.

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Introduction
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2Operatingthe
appliance
2.1 Introduction The following will be examined in turn in this chapter:
•General operation of the appliance;
•Warm-up cycle of the appliance;
•Protecting the appliance;
•Safety of the installation.
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2.2 General operation of
the appliance
Figure 2.1 shows a cross-section of the appliance.
For this appliance the cold water is fed into the bottom of the tank via the cold
water inlet z. The combustion heat is transferred to the water through the
combustion chamber jand flue tubes d. The heated tap water leaves the tank
from the hot water outlet o. Once the appliance is completely full of water, it is
constantly under water supply pressure. When draining hot water from the
appliance, it is immediately topped up with cold water.
The gas that is needed for combustion flows via the gas control linto the
manifold. Injectors are located in the manifold. The gas is injected via these
injectors into the bar burners C. Together the bar burners constitute the burner
tray. Whilst the gas is being injected into the bar burners, the primary air that is
needed for combustion is also sucked in(1). Air is also sucked in through the
openings in the burner tray. The glow igniter Ais responsible for igniting the
gas-/air mixture. The flue gases released during combustion here are drawn
Legend
aflue gas outlet
bdraught diverter
canodes
dflue tubes
eflue baffles
fPU insulation layer
gtank
hcleaning opening
idrain valve
jcombustion chamber
kradiation shield/condensation
tray
lgas control
mflue gas thermostat sensor
nflue gas thermostat
ohot water outlet
psafety thermostat sensor
qmaximum thermostat sensor
rcontrol panel
scontrol thermostat
tburner controller
umaximum thermostat
vfrost thermostat
wsafety thermostat
xcontrol thermostat sensor
yfrost thermostat sensor
zcold water inlet
Aglow igniter
Bionization pin
Cbar burners/burner tray
Figure 2.1 Cross-section of the appliance
IMD-0143
m
n
o
p
u
x
z
A
C
q
t
w
r
s
v
y
B
a
c
d
e
f
h
i
j
k
g
b
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Warm-up cycle of the appliance
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through the flue tubes d; flue baffles eare located in the flue tubes. These
delay the transport of the flue gases, which has the effect of improving
efficiency. The flue gases leave the appliance via the draught diverter b. A
radiation shield/condensation tray kis fitted under the burner tray. This
prevents overheating of the floor surface under the appliance and serves as a
collection tray for condensation water.
The PU insulation layer fprevents heat loss. The inside of the tank is
enamelled to protect against corrosion. The anodes cprovide additional
protection. The Hydro Cannon also protects the bottom of the tank from furring.
2.3 Warm-up cycle of the
appliance
The complete appliance is controlled by the burner controller tand the control
thermostat sor frost thermostat v. The control thermostat and frost thermostat
both independently measure the water temperature (Twater). The appliance's
warm-up cycle is activated as soon as Twater falls below the threshold value
(Tset). The value of Tset depends on the selected state of the appliance, see
paragraph ’6.2 Operating states’. If the appliance is in its 'OFF mode' (frost
protection) then this value is determined by the frost thermostat (threshold value
= 20°C). If the appliance is in its 'ON mode', then the threshold value can be set
via the control thermostat (±40°C - ±70°C).
As soon as Twater falls below Tset the (control or frost) thermostat in question
closes and the burner controller confirms a heat demand. The gas control lis
opened and the gas is mixed with air. This mixture is ignited with the glow
igniter Aand the water is heated. As soon as Twater rises above Tset, the
thermostat opens once again. The heat demand is cancelled and the burner
controller stops the warm-up cycle.
The thermostats have a set margin both when closing and opening. This margin
is referred to as the hysteresis. The hysteresis cannot be adjusted.
2.4 Protecting the
appliance
The burner controller monitors the water temperature using thermostats and is
responsible for safe combustion. This takes place by:
•theWater temperature protection;
•theFlue gas outlet cut-out;
•theIonisation pin.
1. The gas flow is accelerated through the narrow opening in the injector. This creates a vacuum. Air
is also drawn in (Venturi effect) through the suction effect of this vacuum.

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2.4.1 Water temperature protection
Theburner controller uses thefrost, maximum andsafety thermostat tomonitor
three temperatures that are important in terms of safety. Table 2 . 1
2.4.2 Flue gas outlet cut-out
The flue gases are drawn outside via the draught diverter band the flue gas
outlet a. To prevent the flue gases from getting into the installation room, the
outlet for it is monitored by a so-called thermal reflux safety (T.R.S.) feature. For
this purpose a flue gas thermostat sensor mcomplete with flue gas
thermostat nis fitted in the draught diverter. Under normal circumstances this
sensor measures the ambient temperature. However, if it is not drawing
sufficiently (for example, due to a blocked chimney), the flue gases will 'return'
and flow back past the flue gas thermostat sensor. The sensor then measures
an excessive temperature and the flue gas thermostat opens. The heat demand
ends and the burner control immediately stops the warm-up cycle. A lock out
fault occurs on the flue gas thermostat. This has to be manually reset before the
appliance can be put back into operation.
2.4.3 Ionisation pin
To prevent gas flowing when there is no combustion, an ionization pin Bis fitted.
Theburner controller uses thispinforflame detectionby measuringionisation.
Theburner controller immediatelycutsoffthe gasflowassoon asitdetermines
that gas is flowing but there is no flame.
2.5 Safety of the
installation
In addition to the standard safety monitoring of the appliance, the appliance
must also be protected by an expension vessel, pressure overflow valve, non-
return valve and a T&P valve.
Use of an expension vessel, a pressure overflow valve and/or a pressure
reduction valve depends on the type of installation: unvented or vented.
2.5.1 Unvented installation (sealed)
With an unvented installation, a pressure overflow valve and expension vessel
prevent excessive pressure in the tank. This prevents damage from occurring
to the enamelled coating (in the appliance) or to the tank. A non-return valve
prevents excessive pressure in the water supply system. This valve also
prevents water from flowing from the tank into the water supply system. The
pressure reduction valve protects the installation against an excessively high
water supply pressure (> 8 bar). These components are fitted to the cold water
pipe. See paragraph ’3.6.1 Cold water side’.
Table 2.1 Temperature protection
Protection Description
Frost thermostat If the frost thermostat sensor ymeasures a temperature of 20°C or lower, the
appliance's warm-up cycle is started. See paragraph ’2.3 Warm-up cycle of
the appliance’.
Maximum thermostat If the maximum thermostat sensor qmeasures a temperature, which is higher
than 84°C, the maximum thermostat opens. The heat demand ends and the
burner control stops the warm-up cycle until the maximum thermostat closes
again. Immediately the burner control resets the appliance and re-starts the
warm-up cycle. Maximum protection serves to prevent overheating and/or
excessive scaling in the appliance.
Safety thermostat If the safety thermostat sensor pmeasures a temperature, which is higher
than 93°C, the safety thermostat opens. The heat demand ends and the
burner control immediately stops the warm-up cycle. A lock out fault occurs on
the burner control. This has to be manually reset before the appliance can be
put back into operation.

Safety of the installation
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2.5.2 Vented installation (open)
With a vented installation, excess pressure is taken up by the open water
reservoir. The level of the water reservoir determines the maximum working
pressure in the tank, which may not exceed 8 bar. The installation must also be
fitted with an overflow from the hot water pipe that empties into the water
reservoir. See paragraph ’3.6.3 Hot water side’.
2.5.3 T&P valve
A T&P valve is only required in 'unvented' installations. State however also
recommends the use of a T&P valve in ‘vented’ installations.
A T&P valve monitors the pressure in the tank and the water temperature at the
top of the tank. If the pressure in the tank becomes too high (>10 bar) or the
water temperature is too high (>97°C) the valve will open. The hot water can
now flow out of the tank. Because the appliance is under water supply pressure,
cold water will automatically flow into the tank. The valve remains open until the
unsafe situation has been averted. The appliance has a connecting point for a
T&P valve as standard. See paragraph ’3.6.3 Hot water side’.

Operating the appliance
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Introduction
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3 Installation
Warning
The installation should be carried out by an approved installer in accordance
with the general and local regulations in force of gas, water supply and
power supply companies and the fire brigade.
The appliance may only be installed in a room if this room complies with the
required national and local ventilation regulations.
See also paragraph ’1.3 Regulations’.
3.1 Introduction This chapter describes the installation instructions to be carried out before
you can finally put the appliance into operation, namely:
•Packaging;
•Environmental conditions;
•Technical specifications;
•Water connections Unvented;
•Water connections Vented;
•Gas connection;
•Flue gas outlet;
•Electrical connection;
•Convert to another category of gas;
•Checking the supply pressure and burner pressure;
nRemark
Putting into operation is described in chapter ’7 Putting into and out of
operation’.
Figure 3.1 shows a front view of the appliance.
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Installation
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Figure 3.1 Top and front of the appliance
IMD-0145