Smithco ADMP 40 G Manual

INSTALLATION INSTRUCTIONS
AND USER'S MANUAL
UNITED KINGDOM
WATER HEATERS
MODELS ADMP 40 G
ADMP 50 G
ADMP 60 G
ADMP 80 G
ADMP 90 G
ADMP 115 G

2
FOREWORD
Before attempting to install this water heater please read the installation instructions. Read the user’s manual before first
igniting the heater. Failure to follow these instructions meticulously could lead to risk of an explosion and/or fire and can
cause material damage and/or physical injuries.
An accredited installer must install the heater and commission it for the first time. The type of gas and the values are pre-
set (ex works) and are given on the model plate. The heater may only be installed in an area of which the available
clearances comply with the required ventilation regulations.
The ADMP models are fitted with a permanent pilot light.
A.O.SMITHCANNOTACCEPTANYRESPONSIBILITYFORGUARANTEE,SERVICEAND/ORPRODUCTLIABILITYINTHE
EVENTOFUNAUTHORISEDCHANGES, PRODUCT MODIFICATIONS OR REPAIRS.

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CONTENTS PAGE
PILOT-LIGHTHEATERS(modellenADMP40t/m115)
1GENERAL
1.1 Description of the heater ................................................................................................................ 4
1.2 Technical safety equipment............................................................................................................ 5
1.2.1 Gas control block ............................................................................................................................ 5
1.2.2 Control box ...................................................................................................................................... 5
1.2.3 Thermal reflux safeguard (TRS) .....................................................................................................5
1.3 Technical description...................................................................................................................... 6
1.3.1 Dimensions .................................................................................................................................... 6
1.3.2 Technical data................................................................................................................................. 8
2 FORTHEINSTALLER
2.1 Installation instructions.................................................................................................................10
2.1.1 Installation.....................................................................................................................................10
2.1.2 Water connection ..........................................................................................................................10
2.1.3 Gas connection .............................................................................................................................12
2.1.4 Flue system...................................................................................................................................12
2.1.5 Flue-gas discharge.......................................................................................................................12
2.1.6 Thermal reflux safeguard (TRS) ...................................................................................................13
2.1.4 Electrical connection.....................................................................................................................13
2.2 Commissioning............................................................................................................................14
2.2.1 Filling the heater ...........................................................................................................................14
2.2.2 Commissioning ADMP models....................................................................................................14
2.2.3 Setting the pilot light......................................................................................................................14
2.3 Shutting down ...............................................................................................................................14
2.4 Operation/temperature control .....................................................................................................14
2.5 Setting the nominal loads.............................................................................................................15
2.6 Conversion to another gas ...........................................................................................................15
2.7 Maintenance..................................................................................................................................17
2.8 Anode ............................................................................................................................................17
2.9 Deliming........................................................................................................................................17
2.10 Condensation ...............................................................................................................................17
2.11 Spare parts ...................................................................................................................................17
3 FORTHEUSER
3.1 Instructions for use .......................................................................................................................18
3.1.1 Warning .........................................................................................................................................18
3.1.2 Filling the heater ...........................................................................................................................18
3.1.3 Commissioning ADMP models....................................................................................................18
3.2 Operation ......................................................................................................................................18
3.3 Shutting down ...............................................................................................................................18
3.4 Maintenace ....................................................................................................................................18
4 WHATTODOINCASEOFAFAILURE
4.1 General .........................................................................................................................................19
4.1.1 Overheat thermostat .....................................................................................................................19
4.1.2 Thermal Reflux Safeguard (TRS) .................................................................................................19
4.1.3 Wrong hot water temperature .......................................................................................................19
4.1.4 Water temperature too high ..........................................................................................................19
4.2 Fault overview................................................................................................................................20
5WARRANTY
5.1 Garantee in general ......................................................................................................................21
5.2 Garantee of the tank...................................................................................................................... 21
5.3 Conditions for installation and use ..............................................................................................21
5.4 Exclusions.....................................................................................................................................21
5.5 Range of the quarantee ................................................................................................................21
5.6 Claims...........................................................................................................................................21
5.7 No other quarantee or warranty either expressed or implied is made on behalf
of A.O.SMITHWATERPRODUCTSCOMPANY ...........................................................................21
Appendix1 Electrical scheme ADMP-models.................................................................................................22

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Diagram 1- Cross-section ADMP-models
1 Draught diverter
2 High-limit and overheat
thermostat sensors
3 Hot-water outlet
4 Thermostat sensor
5 Control box
6 Cold-water inlet
7 Drain cock
8 Thermocouple
9 Pilot burner
10 Gas control block
11 Flue-pipe connection
12 Covering plate for flue-damper
assembly
13 Support for draught diverter
14 T&P connection (temperature
and pressure valve)
15 Anode
16 Flue tubes
17 Flue baffles
18 Insulation
19 Bar burners
20 Radiation shield/condensate
tray
PILOT LIGHT HEATERS (MODELS ADMP)
1. GENERAL
1.1 Description of heater
Construction methods and equipment of the heaters are
in accordance with the European standards for gasfired
hot water heaters for sanitary use (EN 89). The heaters
are therefore comply with the European Guidelines for
Gas Heaters and are therefore permitted to carry the CE
hallmark. These are open flued heaters without
mechanical ventilator, with a Thermal Reflux Safeguard
(TRS) (heater category B11BS ). The heaters are suitable
for use with a working pressure of up to 8 bar.
The cylindrical tank is made from sheet steel containing
a number of vertically placed flue tubes. For protection
against corrosion, the inside of the tank is enamelled.
The tank is also fitted with a number if magnesium
anodes for extra protection against corrosion. A thick PU
insulating layer between the tank and the steel jacket
helps to reduce unnecessary heat loss.
When the heater is completely filled with water, it is
under continual mains water pressure. When hot water
is drained from the heater, cold water immediately
enters the heater. For effective heat transfer flue baffles
have been included in the flue tubes. Heat from the flue-
gases is transferred to the water by means of radiation
and convection. The flue-gases are guided to the
chimney via a rotateable and removable draught diverter.
Flue-gases are discharged by thermal draught.
The atmospheric burner consists of a number of bar
burners. One injector is screwed into the manifold for
each bar burner. The function of the injectors in the inlet
venturi ensures a good mixture of gas and primary air.
Secondary air is drawn in between the bar burners. The
permanent piliot light ensures that the burner ignites as
soon as there is a demand for heat.
A radiation shield is fitted beneath the burner which also
serves to collect any condensate (see diagram 1)

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1.2 TECHNICALSAFETYEQUIPMENT
1.2.1. Gas control block
the heaters are equipped with a gas control block which
regulates the flow of gas to the burner. The gas control
block is equipped with a safety valve, gas control valve,
pilot light pressure control and burner control (on a
standard natural gas setting). The safety valve is
controlled by the millivoltage generated when the
thermocouple is heated by the permanent pilot. To
ensure improved ignition the gas control valve opening
mechanism is fitted with a delay (softlite).
1.2.2. Controlbox
Temperature control for the water heater is housed in
the control box. For safety purposes, heaters are always
filled with three thermostats: a control thermostat, a
high-limit thermostat and an overheat thermostat. The
desired water temperature is set with the control
thermostat. The overheat thermostat prevents the water
reaching too high a temperature.
Diagram 2- Control box ADMP-models
Should both control and high-limit thermostats
malfunction, the overheat thermostat will automatically
shut down the heater. The overheat thermostat breaks
the thermocouple circuit, which closes the safety valve,
cutting of the supply of gas to the pilot burner which
extinguishes the pilot light.
The control thermostat can be set at settings 1-4
(approx. 40ºC to 73ºC). the switch temperature of the
high-limit thermostat is 84ºC; the overheat thermostat
cuts in at 93ºC. The sensor for the control thermostat is
located at the level of the control box; the sensors for the
high-limit and overheat thermostats are located near the
top of the heater.
The control box is fitted with an ON/OFF switch (I/O).
At setting I, the gas control block is controlled on the
basis of heat demand from the control thermostat. At
setting O the heater is switched off.
1.2.3. Thermal Reflux Safeguard
The heater is equipped with a Thermal Reflux Safeguard
(TRS), which consists of a temperature sensor and
thermostat fitted to the draught diverter. The function of
the TRS is to switch off the heater if flue gases pass
through the draught diverter and enter the area in which
the heater is installed instead of being expelled via the
chimney.

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1.3 TECHNICALDESCRIPTION
1.3.1 Dimensions (see diagram 3)
The heaters must be connected to a flue with a
minimum of the prescribed diameter (see size G).
Connection to a pipe of a larger diameter by means of a
coupling is permitted.
Size
A
B
D
E
F
G
H
J
K
L
M
N
P
R
S
1
2
3
4
5
6
ADMP40
1900
1760
710
800
1100
150
660
1840
205
400
565
1605
730
500
1550
ADMP50
2100
1960
710
800
1100
150
660
2040
205
400
565
1810
730
515
1760
ADMP60
1900
1760
710
800
1100
180
660
1840
205
400
565
1605
730
500
1550
ADMP80
2100
1960
710
800
1100
180
660
2040
205
400
565
1810
730
515
1760
ADMP90
2000
1795
710
800
1105
225
675
1935
205
400
575
1640
740
525
1595
ADMP 115
2085
1870
710
800
1105
225
675
2010
205
405
650
1715
825
600
1660
Cold water inlet
Hot water outlet
Gas control block
Drain cock
T&P-connection (temperature and pressure valve)
Covering plate for inspection hatches
All measurements are given in millimetres (rounded off to the nearest 5 mm).

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Diagramm 3 - dimensions ADMP

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DESCRIPTION Unit ADMP 40 ADMP 50 ADMP 60 ADMP 80 ADMP 90 ADMP 115
NATURAL GAS DATA G20-20mbar
Nominal input (lower value) kW 38.0 50.9 59.8 74.3 88.5 114.0
Nominaloutput kW 32.3 42.8 50.2 62.4 74.395.8
Inlet pressure (G20) mbar 20 20 20 20 20 20
Burner pressure (G20) mbar 8.5 8.5 8.5 8.5 8.5 8.5
Gas consumption * (G20) m3/h 4.0 5.4 6.3 7.9 9.4 12.1
Diameter main injector (G20) mm. 3.20 3.20 3.10 2.95 3.20 3.20
Diameter pilot light injector (G20) mm 0.56/0.41 0.56/0.41 0.56/0.41 0.56/0.41 0.56/0.41 0.56/0.41
Heating time ∆T = 45K min. 30 26 19 17 12 8
BUTANE DATA G30 - 30 mbar
Nominal input (lower value) kW 38.4 51.0 62.9 74.5 88.7 114.0
Inlet pressure (G30) mbar 30 30 30 30 30 30
Burner pressure (G30) mbar 30 30 30 30 30 30
Gas consumption * (G30) kg/h 3.0 4.0 5.0 5.9 7.0 9.0
Diameter main injector (G30) mm. 1.70 1.70 1.70 1.50 1.70 1.70
Diameter pilot light injector (G30) mm. 0.25 0.25 0.25 0.25 0.25 0.25
Heating time ∆T = 45K min. - - -- --
PROPANE DATA G31 - 37 mbar
Nominal input (lower value) kW 35.3 47.0 58.2 71.5 82.4 104.0
Inlet pressure (G31) mbar 37 37 37 37 37 37
Burner pressure (G31) mbar 37 37 37 37 37 37
Gas consumption * (G31) kg/h 2.7 3.7 4.5 5.66.4 8.1
Diameter main injector (G31) mm. 1.70 1.70 1.70 1.50 1.70 1.70
Diameter pilot light injector (G31) mm. 0.25 0.25 0.25 0.25 0.25 0.25
Heating time ∆T = 45K min. - - -- --
1.3.2. Technical data
Heater categorie II2H3+
* Gas consumption at 1013,25 mbar and 15°C

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GENERAL
Storage capacity litre 309 357 298 355 278 253
Numbers of bar burners - 3 4 5 7 7 9
Number of anodes - 2 2 2 3 3 4
Number of flue tubes - 5 6 7 9 12 16
Water connections - Rp 1½ Rp 1½ Rp 1½ Rp 1½ Rp 1½ Rp 1½
Gas connection - Rp ¾ Rp ¾ Rp ¾ Rp ¾ Rp ¾ Rp ¾
Drain cock - ¾"NPT ¾"NPT ¾”NPT ¾"NPT ¾"NPT ¾” NPT
Anode - ¾"NPT ¾"NPT ¾”NPT ¾"NPT ¾"NPT ¾”NPT
T&P - plug connection - 1"NPT 1"NPT 1"NPT 1"NPT 1"NPT 1"NPT
Maximum working pressure bar 8 8 8 8 8 8
Weight (empty) kg 195 221 209 238 244 270

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2. FOR THE INSTALLER
2.1. INSTALLATIONINSTRUCTIONS
This water heater must be fitted in a location which will
permit the provision of an approved flue system and
adequate ventilation.
The water heater must stand on a level surface resistant
to heat and with sufficient strength to support the weight
of the unit when full of water.
This water heater must not be installed in a bathroom,
bedroom or in a cupboard opening on to such rooms.
This water heater must not be installed in any area
where flammable materials are used or stored.
Insufficient ventilation may give rise to a risk of fire,
explosion or suffocation. If in doubt consult the national
and local regulations governing the installation of gas
appliances or your local British gas service department.
2.1.1 Installation
These water heaters must be installed by a qualified
competent installer, in accordance with the following
standards and regulations.
Gas safety (installation and use) regulations 1944.
BS 5440 part 1 1990
part 2 1989
Installation should be carried out in accordance with all
local authority and building regulations, local water
authority and fire regulations and the following British
standards: British Gas Publication UP1 and UP2.
BS 5482 part 1 1979
part 2 1979
part 3 1979
BS 6644
BS 6700
BS 6798
Some chemicals produce vapours which can cause
rapid failure of thermocouples, burners and storage
tanks if they ware drawn into the combustion air supply.
Therefore if this water heater will be used to supply hot
water to:
- hairdressers
- dry cleaners
- industrial degreasing processes
or any other area where compounds containing
halogens are used and stored, care should be taken
that all primary and secondary air is drawn from outside
atmosphere free of such contaminents.
For further advise contact A.O.Smith.
2.1.2 Water connections
A.O.Smith water heaters are suitable for connection to
vented, unvented and pumped pressurised systems. In
each case appropriate valves and fittings should be
used to ensure the system complies with the
requirements of the water by laws, and appropriate
building regulations.
When fitting it is essential the rules of ‘good practice’ are
applied at all stages of installation.
Vented systems
If the water heater is to be connected to a cold feed tank
of cistern the hot water supply pipe must include an
open vent which discharges over the cold feed cistern.
The cold feed cistern must have an actual capacity of
greater volume than the hourly recovery rate of the water
heater(s) which it supplies. The minimum actual
capacity is 50 gallons or 227 litres. See diagram 4.
Diagram 4 – Typical UK vented system
1 Gas cock
2 Stopvalve
3 Three way vent valve
4 T&Pvlave
5 Non-return valve
6 Circulation pump
7 Drain valve
A Gas Supply
B Hot Water
C Cold Water
D Overflow
E Return Circulation