State Water Heaters SOF 85 220 G Manual

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INSTALLATION INSTRUCTIONS
AND
USERS MANUAL
UNITED KINGDOM / IRELAND
WATER HEATERS
MODELS SOF 85 220 G
SOF 85 260 G
SOF 85 300 G
SOF 75 390 G
SOF 75 470 G
SOF 70 700 G

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FOREWORD
Before attempting to install this water heater please read the installation instructions. Read the users manual before igniting
the heater. Failure to follow these instructions meticulously could lead to the risk of an explosion and/or a fire and can cause
material and/or physical injuries.
An accredited installer must install the heater and commission it according to the locally valid requirements. The heater may
only be installed in an area that meets the required ventilation regulations.
STATE WATER HEATERS CANNOT ACCEPT ANY RESPONSIBILITY FOR GUARANTEE, SERVICE AND/OR PRODUCT
LIABILITY IN THE EVENT OF UNAUTHORIZED CHANGES, PRODUCT MODIFICATIONS OR REPAIRS.

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CONTENTS PAGE
1. GENERAL
1.1 Description of the heater ................................................................................................................. 5
1.2 Technical safety equipment.............................................................................................................5
1.2.1 Control box ...................................................................................................................................... 5
1.3 Technical description ...................................................................................................................... 6
1.3.1 Dimensions...................................................................................................................................... 6
1.3.2 Burners ............................................................................................................................................ 8
1.3.3 Technical data ................................................................................................................................. 9
1.3.4 Setting the burner head ................................................................................................................. 10
1.3.5 Setting the air valve ....................................................................................................................... 10
2. FOR THE INSTALLER
2.1 Installation procedure .................................................................................................................... 11
2.1.1 Installation ..................................................................................................................................... 11
2.1.2 Water connections ........................................................................................................................ 11
2.1.2.1 Vented system ............................................................................................................................... 12
2.1.2.2 Unvented system ........................................................................................................................... 13
2.1.3 Flue gas exhaust ........................................................................................................................... 15
2.1.4 Burner connection ......................................................................................................................... 15
2.1.5 Electrical connection ..................................................................................................................... 15
2.2 Commissioning .............................................................................................................................. 15
2.2.1 Filling the heater ............................................................................................................................ 15
2.2.2 Turning on the burner .................................................................................................................... 15
2.3 Shutting down ................................................................................................................................ 15
2.4 Usage/temperature control ............................................................................................................ 15
2.5 Maintenance .................................................................................................................................. 16
2.6 Anode ............................................................................................................................................ 16
2.7 Descaling....................................................................................................................................... 16
2.8 Condensation ................................................................................................................................ 16
2.9 Spare parts .................................................................................................................................... 16
3. FOR THE USER
3.1 Instructions for use ........................................................................................................................ 17
3.1.1 Lighting the heater......................................................................................................................... 17
3.1.2 Filling the heater ............................................................................................................................ 17
3.1.3 Commissioning .............................................................................................................................. 17
3.2 Operation....................................................................................................................................... 17
3.3 Shutting down ................................................................................................................................ 17
3.4 Maintenance .................................................................................................................................. 17
4. WHAT TO DO IN CASE OF FAILURE
4.1 General .......................................................................................................................................... 18
4.2 Fault overview ............................................................................................................................... 18
5. WARRANTY
5.1 Guarantee in general..................................................................................................................... 19
5.2 Guarantee of the tank.................................................................................................................... 19
5.3 Conditions for installation and use ................................................................................................ 19
5.4 Exclusions ..................................................................................................................................... 19
5.5 Range of guard..............................................................................................................................19
5.6 Claims............................................................................................................................................ 19
5.7 No other guarantee or warranty either expressed or implied is made on behalf
of STATE WATER HEATERS .......................................................................................................19
6. APPENDIX
6.1 Electrical diagram SOF ................................................................................................................. 20

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1. GENERAL
1.1 Description of the heater
Construction of the heater is in accordance with the
European standards for water heaters for sanitary use
(EN 89). The heaters therefore comply with the European
Guidelines for Water Heaters and are permitted to carry
the CE mark.
They are atmospheric heaters suitable for oil-fired
ventilator burners (heater category B23).
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
glass lined. The tank is also fitted with a number of
magnesium anodes for extra protection against
corrosion. A thick PU insulating layer between the tank
and the steel jacket helps to reduce heat loss.
When the heater is completely filled with water, it is
under continuous 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.
1.2 Technical safety equipment
1.2.1 Control box
The temperature control for the water heater is situated in
the control box (see figure 1), which is fitted to the heater
cover.
The water heater has been fitted with three thermostats:
- a control thermostat,
- a high-limit thermostat
- an overheating cut-out.
The control thermostat is the thermostat by means of
which the desired water temperature is set.
The high-limit thermostat acts as a safeguard against
excessive water temperatures at the top of the heater,
if as a result from a certain draining pattern (frequently
draining of small quantities), stratification of the water
temperatures in the heater occur. If both the control
thermostat and the high-limit thermostat fail
the overheating cut-out will automatically shut down
the water heater.
The overheating cut-out interrupts the current supply
to the burner, as a result of which the oil supply will stop.
The control thermostat can be set between 40°C and
80°C by means of the temperature control knob.
The high-limit thermostat switches at 84°C, the
overheating cut-out at 95°C.
The control thermostat’s sensor is located in the lower
immersion well in the control box; the sensors of the
high-limit thermostat and overheating cut-out are located
in the immersion well at the top of the heater.
If the overheating cut-out is activated, it must be
manually reset. This is only possible when the
temperature at the top of the heater has dropped below
89°C.
The control box is fitted with an ‘ON/OFF’ switch (‘I/0’). In
position ‘I’ the ventilator burner is controlled on the basis
of the heat demand from the control thermostat. In
position ‘0’ the heater is switched off.
Figure 1: Control box SOF

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1.3 Technical description
1.3.1 Dimensions
(See figure 2).
All dimensions are in millimetres (rounded off to the
nearest 5 mm)
* after installing the flue reducer
Size SOF 85 220 SOF 85 260 SOF 85 300 SOF 75 390 SOF 75 470 SOF 70 700
A 1900 1900 1900 1900 1900 2025
B 685 685 685 640 640 765
C 585 585 585 605 605 745
D 705 705 705 705 705 705
E 150* 200 200 200 200 250*
F 1700 1700 1700 1630 1630 1770
G 1720 1720 1720 1650 1650 1785
1 Hot water outlet
2 Cold water inlet
3 Drain valve
4 Burner fixing flange
5 T & P connection (temperature and pressure valves)
6 Inspection opening
7 Cleaning opening

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Figure 2: Dimensions

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1.3.2 Burners
The water heaters are suitable for oil-fired burners.
The water heaters have been examined and tested with
the following front-mounted burners from Riello:
The burners for the SOF 70 700 heaters must be fitted
with a special fire tube in view of the higher
temperatures in the heater’s combustion chamber. The
manufacturer has already fitted the special fire tube to a
burner supplied direct with the water heater. Otherwise
the special fire tube must be retrofitted. Please consult
your supplier on this matter.
The heaters are also suitable for front-mounted burners
from other manufacturers, provided that the following
conditions are met:
- The front-mounted burners must be EC approved,
- The flame length of the front-mounted burner must
be less than the diameter of the heater’s combustion
chamber. This diameter is 510 mm for all heaters,
- For the SOF 75 470 and SOF 70 700 a starting load
of 120 kW at maximum (according to EN 676) must
be set. Consult to this end the instruction manual of
the front-mounted burner used,
- The air-proving switch must be set in such a way that
it cuts out before the CO contents of the flue gas
reaches a value of 2000 ppm.
- The maximum burner pressure of the heater
amounts to 25 Pa across the entire range. The
selected burner must be able to supply at least this
pressure.
Before installing and commissioning the selected burner,
you must consult the front-mounted burner’s instruction
manual.
OIL-FIRED BURNER
MODEL TYPE
SOF 85 220 RG 2 377 T1
SOF 85 260 RG 2 377 T1
SOF 85 300 RG 3 393 T1
SOF 75 390 RG 3 393 T1
SOF 75 470 RG 3 393 T1
SOF 70 700 RG 4S 396 T1
HEATER

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DESCRIPTION Unit SOF 85 SOF 85 SOF 85 SOF 75 SOF 75 SOF 70
220 260 300 390 470 700
OIL DATA
Burner model [-] RG 2 RG 2 RG 3 RG 3 RG 3 RG 4S
Burner type [-] 377 T1 377 T1 393 T1 393 T1 393 T1 396 T1
Nozzle (Delavan) [-] 1.25x80W 1.5x80B 1.75x80B 2.25x80B 2.75x80B 4.0x80B
Nominal load (lower value) kW 62.8 75.4 87.9 113 138 201
Nominal power kW 52.3 63.3 73.9 95 116 168.8
Oil flow rate kg/h 5.3 6.3 7.4 9.5 11.6 16.9
Pump pressure bar 12 12 12 12 12 12
GENERAL
Contents litre 322 322 318 282 282 259
Number of anodes - 2 2 2 3 3 4
Number of fire tubes - 6 6 7 12 12 16
Cold water inlet - ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½
Hot water outlet - ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½ ISO-7 Rp 1½
Drain valve - ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT
Anode - ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT ¾ - 14 NPT
T & P connection - 1 - 11.5 NPT 1 - 11.5 NPT 1 - 11.5 NPT 1 - 11.5 NPT 1 - 11.5 NPT 1 - 11.5 NPT
Maximum working pressure bar 8 8 8 8 8 8
Weight (empty) kg 260 260 260 290 290 335
1.3.3 Technical data
The data below only apply to front-mounted burners from Riello
Oil: fuel oil, max. viscosity at 20°C: 6 mm2/s

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1.3.5 Setting the air valve
The air valve is set as a function of the water heater’s
required flow rate. During the commissioning of the water
heater, the position of the air valve must be set to the
value stated in the table below. Please refer also to the
burner’s instruction manual.
The setting of the air valve for Riello front-mounted
burners is as follows:
The values above are recommended settings and have
been determined under laboratory conditions.
A maximum CO2 figure of 12.5% applies to oil. If the CO2
figure does not meet the requirements after the air valve
has been set, the latter must be readjusted.
1.3.4 Setting the burner head
The burner head is set as a function of the water
heater’s required flow rate. During the commissioning of
the water heater, the position of the burner head must
be set to the value stated in the table below. Please also
refer to the burner’s instruction manual.
The setting of the burner head for Riello front-mounted
burners is as follows:
SOF 85 220 2
SOF 85 260 3
SOF 85 300 3
SOF 75 390 3
SOF 75 470 4
SOF 70 700 4
UNIT Notch number … in burner head
Oil-fired burner
SOF 85 220 2.4
SOF 85 260 3.5
SOF 85 300 1.7
SOF 75 390 2.7
SOF 75 470 3
SOF 70 700 3.5
UNIT Notch number … in burner head
Oil-fired burner