Lochinvar EcoShield SHW60-325CE, EcoShield Series, EcoShield SHW45-325CE, EcoShield SHW85-435CE, EcoShield SHW145-435CE Installation, Commissioning And Maintenance Instructions
...
The EcoShield™ range
High Efficiency Gas Fired Condensing Water Heaters
Installation, Commissioning and Maintenance
Instructions
INS0013 Issue No 5 | October 2013
SHW45-325CE
SHW60-325CE
SHW85-435CE
SHW115-435CE
SHW145-435CE
Models:
1
2
Table of Contents
1.0 INTRODUCTION ................................................................................................................................................................................................... 4
2.0 PRINCIPLE PARTS ............................................................................................................................................................................................... 5
3.0 TECHNICAL DATA ................................................................................................................................................................................................ 8
4.0 GENERAL REQUIREMENTS ............................................................................................................................................................................. 10
4.1 RELATED DOCUMENTS ............................................................................................................................................................................. 10
5.0 WATER QUALITY ............................................................................................................................................................................................... 11
6.0 LOCATION ........................................................................................................................................................................................................... 11
6.1 PLANT ROOM REQUIREMENTS ................................................................................................................................................................ 11
6.2 GENERAL REQUIREMENTS ....................................................................................................................................................................... 11
6.3 CLEARANCES .............................................................................................................................................................................................. 12
6.4 CONDENSATE DRAIN ................................................................................................................................................................................. 12
7.0 GAS SUPPLY ...................................................................................................................................................................................................... 12
7.1 SERVICE PIPES ........................................................................................................................................................................................... 12
7.2 METERS ....................................................................................................................................................................................................... 12
7.3 GAS SUPPLY PIPES .................................................................................................................................................................................... 12
7.4 BOOSTED SUPPLIES .................................................................................................................................................................................. 12
7.5 PLANT-ROOM CONTROL VALVE ............................................................................................................................................................... 12
7.6 EQUIPMENT GAS SYSTEM LEAK CHECK ................................................................................................................................................ 13
8.0 FLUE SYSTEM .................................................................................................................................................................................................... 13
8.1 FLUE SYSTEM GENERAL REQUIREMENTS............................................................................................................................................. 14
8.2 APPROVED FLUE SYSTEM ........................................................................................................................................................................ 14
8.3 INSTALLATION PRECAUTIONS ................................................................................................................................................................. 14
8.4 MAXIMUM LENGTH ..................................................................................................................................................................................... 14
8.5 FLUE DISCHARGE ....................................................................................................................................................................................... 14
8.6 CONDENSATE DRAIN ................................................................................................................................................................................. 14
8.7 CONCENTRIC FLUE CONNECTION ASSEMBLY ...................................................................................................................................... 15
8.7.1 SHW45-325CE & SHW60-325CE .......................................................................................................................................................... 15
8.7.2 SHW85-435CE, SHW115-435CE & SHW145-435CE ........................................................................................................................... 16
8.8 FLUE TERMINAL INSTALLATION ............................................................................................................................................................... 17
8.8.1 TYPE B23 ................................................................................................................................................................................................ 17
8.8.2 TYPE C13 ................................................................................................................................................................................................ 18
8.8.3 TYPE C33 ................................................................................................................................................................................................ 18
8.8.4 TYPE C43 ................................................................................................................................................................................................ 19
8.8.5 TYPE C53 ................................................................................................................................................................................................ 20
8.9 FLUE TERMINAL GUARDING ..................................................................................................................................................................... 20
9.0 AIR SUPPLY ........................................................................................................................................................................................................ 20
9.1 COMBUSTION VENTILATION ..................................................................................................................................................................... 20
9.2 COOLING VENTILATION ............................................................................................................................................................................. 21
10.0 WATER CONNECTIONS .................................................................................................................................................................................... 21
10.1 GENERAL ..................................................................................................................................................................................................... 21
10.2 OPEN VENTED SYSTEM ARRANGEMENT ............................................................................................................................................... 21
10.3 UNVENTED SYSTEM ARRANGEMENT ..................................................................................................................................................... 21
10.3.1 TEMPERATURE AND PRESSURE RELIEF VALVE ..................................................................................................................... 21
10.3.2 RELIEF VALVE DISCHARGE PIPEWORK .................................................................................................................................... 22
10.3.3 EXPANSION VESSEL SIZING ........................................................................................................................................................ 23
11.0 ELECTRICAL SUPPLY ....................................................................................................................................................................................... 23
11.1 EXTERNAL CONTROLS .............................................................................................................................................................................. 23
11.1.1 REMOTE ENABLING ...................................................................................................................................................................... 23
11.2 HIGH VOLTAGE CONNECTOR STRIP ....................................................................................................................................................... 24
11.3 LOW VOLTAGE CONNECTOR STRIP ........................................................................................................................................................ 25
11.4 ELECTRICAL CONNECTIONS .................................................................................................................................................................... 25
11.5 FUSES .......................................................................................................................................................................................................... 25
11.6 ARC WELDING PRECAUTIONS.................................................................................................................................................................. 26
11.7 WIRING DIAGRAM ....................................................................................................................................................................................... 27
11.8 LADDER DIAGRAM ...................................................................................................................................................................................... 28
12.0 USER CONTROL INTERFACE ........................................................................................................................................................................... 29
12.1 GENERAL ..................................................................................................................................................................................................... 29
12.2 USER CONTROL INTERFACE PANEL ....................................................................................................................................................... 29
12.3 SEQUENCE OF OPERATION ...................................................................................................................................................................... 30
12.4 STATUS DISPLAY SCREENS ..................................................................................................................................................................... 31
13.0 COMMISSIONING AND TESTING ..................................................................................................................................................................... 32
13.1 ELECTRICAL INSTALLATION ..................................................................................................................................................................... 32
13.2 GAS INSTALLATION .................................................................................................................................................................................... 32
13.3 WATER CONNECTIONS.............................................................................................................................................................................. 32
13.4 COMMISSIONING THE EQUIPMENT ......................................................................................................................................................... 32
13.4.1 GENERAL CHECKS PRIOR TO LIGHTING ................................................................................................................................... 32
13.4.2 EQUIPMENT CHECKS PRIOR TO LIGHTING............................................................................................................................... 32
13.4.3 PROCEDURE FOR INITIAL LIGHTING .......................................................................................................................................... 33
13.4.4 GAS PRESSURE ADJUSTMENT AND COMBUSTION CHECKS ................................................................................................ 33
13.5 TEMPERATURE ADJUSTMENT PROCEDURE ......................................................................................................................................... 33
13.6 INSTALLATION NOISE ................................................................................................................................................................................ 33
14.0 LPG FUEL ............................................................................................................................................................................................................ 34
14.1 RELATED DOCUMENTS ............................................................................................................................................................................. 34
14.2 CONVERSION TO LPG ................................................................................................................................................................................ 34
3
14.2.1 SHW45-325CE – SHW85-435CE ................................................................................................................................................... 34
14.2.2 SHW115-435CE .............................................................................................................................................................................. 35
14.2.3 SHW145-435CE .............................................................................................................................................................................. 36
14.3 LPG COMMISSIONING AND TESTING ...................................................................................................................................................... 37
14.3.1 LPG PRESSURE ADJUSTMENT AND COMBUSTION CHECKS ................................................................................................. 37
15.0 MAINTENANCE ................................................................................................................................................................................................... 37
15.1 GENERAL ..................................................................................................................................................................................................... 37
15.2 MAINTENANCE SCHEDULE ....................................................................................................................................................................... 37
15.3 BURNER INSPECTION ................................................................................................................................................................................ 37
15.4 BURNER REMOVAL .................................................................................................................................................................................... 38
15.5 CLEANING THE HEAT EXCHANGER ......................................................................................................................................................... 38
15.6 DRAINING THE WATER HEATER SYSTEM............................................................................................................................................... 38
15.7 STORAGE VESSEL: INSPECTION AND CLEANING ................................................................................................................................. 39
15.8 SACRIFICIAL ANODES: INSPECTION AND REPLACEMENT .................................................................................................................. 39
15.9 REFILLING THE SYSTEM ........................................................................................................................................................................... 39
15.10 OTHER CHECKS ................................................................................................................................................................................... 39
15.10.1 RELIEF VALVE ................................................................................................................................................................................ 39
15.10.2 FLUE SYSTEM ................................................................................................................................................................................ 39
15.10.3 CONDENSATE NEUTRALISATION KIT ......................................................................................................................................... 40
16.0 USER CONTROL INTERFACE SETTINGS ....................................................................................................................................................... 40
16.1 ENTERING THE INSTALLER CODE ........................................................................................................................................................... 40
16.2 MENU SET D FUNCTIONS .......................................................................................................................................................................... 40
16.2.1 RESET LAST 10 ERRORS ............................................................................................................................................................. 40
16.2.2 SERVICE MODE DELAY ................................................................................................................................................................ 40
16.3 MENU SET E WHR SETTINGS ................................................................................................................................................................... 41
16.3.1 TANK SETPOINT ............................................................................................................................................................................ 41
16.4 MENU SET H CONTROL MODES ............................................................................................................................................................... 42
16.4.1 CONTROL SOURCE ....................................................................................................................................................................... 42
16.4.2 CASCADE ADDRESS ..................................................................................................................................................................... 42
16.4.3 MAX CASCADE SETPOINT............................................................................................................................................................ 42
16.4.4 CASCADE OFFSET ........................................................................................................................................................................ 42
16.4.5 CASCADE OFF-ON DIFFERENTIAL .............................................................................................................................................. 42
16.5 MENU SET I CIRCULATION PUMPS .......................................................................................................................................................... 42
16.5.1 DHW PUMP DELAY ........................................................................................................................................................................ 42
16.6 MENU SET J SERVICE NOTIFICATION ..................................................................................................................................................... 42
16.6.1 SERVICE NOTIFICATION IN MONTHS ......................................................................................................................................... 42
16.6.2 SERVICE NOTIFICATION RUNNING HOURS .............................................................................................................................. 42
16.6.3 SERVICE NOTIFICATION BOILER CYCLES................................................................................................................................. 42
16.6.4 RESET SERVICE NOTIFICATION COUNTER .............................................................................................................................. 43
17.0 USER INSTRUCTIONS ....................................................................................................................................................................................... 43
4
1.0 INTRODUCTION
The Lochinvar EcoShield™ range is a floor standing direct gas-fired condensing storage water heater. The
equipment comprises a stainless steel mesh radial burner assembly, a heat exchanger that permits fully
condensing operation, a vitreous enamel lined steel storage vessel, a bronze glanded-construction circulating
pump and interconnecting pipework between the storage vessel and heat exchanger.
The burner is initiated by a full electronic ignition sequence control that incorporates a spark ignition and a
flame rectification device for supervision of the flame.
The output from the water heater is regulated by a variable speed combustion fan and gas/air ratio controls
to maintain the correct combustion at all levels of modulation. This configuration allows modulation down to
20% of the rated output.
This equipment is intended for use on Group H Natural Gas (2
nd
Family) and LPG propane (3rd Family). The
information relating to propane firing is to be found in Section 14: LPG FUEL. This equipment MUST NOT
use gas other than that for which it has been designed and adjusted.
This equipment must be installed by a competent person, registered with a H.S.E. approved body. All
installations must conform to the relevant Gas Safety and Building Regulations. Health & Safety
requirements must also be taken into account when installing any equipment. Failure to comply with the
above may lead to prosecution.
If the equipment is to be connected to an unvented (pressurised) system, care must be taken to ensure all
extra safety requirements are satisfied should a high or low-pressure condition occur in the system.
The equipment is designed for direct connection to a flue system.
Ancillary Options:
Unvented/Boosted Water System Kits WH17
Expansion Vessel for Larger System Volumes V25
De-stratification Pump Kit WH9
Condensate Neutralisation Kit KIT2000
Pre-Fabricated Interconnecting Pipework Contact Lochinvar Limited
Flue System Components Contact Lochinvar Limited
5
2.0 PRINCIPLE PARTS
ITEM
DESCRIPTION
FUNCTION
1
Access cover - front
Provides access to the gas train and the heat exchanger.
2
Air intake adapter
Allows for the connection of the air intake pipe to the water heater.
3
Air pressure switch
The air pressure switch detects blocked inlet conditions.
4
Air shroud
The air shroud controls air and gas flow into the burner.
5
Fan
The fan pulls in air and gas through the venturi. Air and gas mix inside the fan and are pushed
into the burner, where they burn inside the combustion chamber.
6
Burner (not shown)
Made with metal fibre and stainless steel construction, the burner uses pre-mixed air and gas and
provides a wide range of firing rates.
7
Condensate drain connection
Connects the condensate drain line to a ½” PVC union.
8
Control module
The control responds to internal and external signals and controls the fan, gas valve, and pumps
to meet the demand.
9
Electronic display
The electronic display consists of 7 buttons and a dual line 32-character liquid crystal display.
10
Flame inspection window
The quartz glass window provides a view of the burner surface and flame.
11
Flame sense electrode
Used by the control module to detect the presence of burner flame.
12
Flue gas sensor
This sensor monitors the flue gas exit temperature. The control module will modulate and shut
down the water heater if the flue gas temperature gets too hot. This protects the flue pipe from
overheating.
13
Gas connection pipe
Threaded pipe connection, ½”, ¾”, or 1", depending on the model. This pipe should be connected
to the incoming gas supply for the purpose of delivering gas to the water heater.
14
Gas valve
The gas valve senses the negative pressure created by the fan, allowing gas to flow only if the gas
valve is powered and combustion air is flowing.
15
Heat exchanger access cover
Allows access to the combustion side of the heat exchanger coils.
16
Heat exchanger inlet temperature
sensor
This sensor monitors the inlet water temperature to the heat exchanger.
17
Heat exchanger outlet temperature
sensor
This sensor monitors the heat exchanger outlet water temperature.
18
High limit sensor
Device that monitors the outlet water temperature. If the temperature exceeds its setting, it will
break the control circuit, shutting the water heater down.
19
Ignition electrode
Provides direct spark for igniting the burner.
20
Mains voltage junction box
The junction box contains the connection points for the mains voltage power and all pumps.
21
Low voltage connection board
The connection board is used to connect external low voltage devices.
22
Low voltage wiring connections
(knockouts)
Conduit connection points for the low voltage connection board.
23
Mains voltage wiring connections
(knockouts)
Conduit connection points for the mains voltage junction box.
24
Pump
Circulates water between the storage vessel and heat exchanger.
25
Pump relay
Switches power to the pump.
26
Stainless steel heat exchanger
Allows water to flow through specially designed coils for maximum heat transfer, while providing
protection against flue gas corrosion. The coils are encased in a jacket that contains the
combustion process.
27
Tank sensor
Used by the control to monitor the temperature of the storage vessel.
28
Top panel
Removable panel to gain access to the internal components.
29
Flue pipe adapter
Allows for the connection of the flue system to the water heater.
30
Venturi
The venturi controls air and gas flow into the burner.
31
Water heater drain valve
Location from which the water heater can be drained.
32
Water inlet
BSP water connection that returns water from the system to the heat exchanger, either 1 ½” or 2",
depending on the model.
33
Water outlet
BSP water connection that supplies hot water to the system, either 1 ½” or 2", depending on the
model.
TABLE 2.1 THE ECOSHIELD WATER HEATER - HOW IT WORKS...
FRONT VIEW
MODELS SHW45-325CE – SHW60-325CE
LEFT SIDE (INSIDE UNIT)
MODELS SHW45-325CE – SHW60-325CE
REAR VIEW
MODELS SHW45-325CE – SHW60-325CE
RIGHT SIDE (INSIDE UNIT)
MODELS SHW45-325CE – SHW60-325CE
6
7
REAR VIEW
MODEL SHW85-435CE – SHW115-435CE
REAR VIEW
MODEL SHW145-435CE
RIGHT SIDE (INSIDE UNIT)
MODEL SHW85-435CE – SHW115-435CE
RIGHT SIDE (INSIDE UNIT)
MODEL SHW145-435CE
3.0 TECHNICAL DATA
Model Number
SHW45-325CE
SHW60-325CE
SHW85-435CE
SHW115-435CE
SHW145-435CE
GENERAL DATA
Input (gross) – kW
44.0
61.5
83.5
116.9
146.5
Input (net) – kW
39.6
55.4
75.2
105.3
132.0
Recovery Rate (44°) – l/hr
806
1153
1567
2164
2768
Recovery Rate (50°) – l/hr
709
1014
1379
1904
2436
Shipping Weight – kg
281
290
379
388
406
Full Weight – kg
614
625
825
838
860
NOX Class
5
Appliance Category
II
2H3P
Countries of Destination
GB/IE
GAS DATA – G20
Nominal gas inlet pressure – mbar
20
Maximum gas inlet pressure – mbar
25
Minimum gas inlet pressure – mbar
17.5
Gas flow rate – m3/hr
4.2
5.7
8.0
11.1
14.0
Flue gas mass rate – g/sec
(@ 9.0% CO2)
16.0
22.3
30.4
42.5
53.2
Gas inlet connection size – “ B.S.P
½
½
¾ 1 1
GAS DATA – G31
Nominal gas inlet pressure – mbar
37
Maximum gas inlet pressure – mbar
45
Minimum gas inlet pressure – mbar
27
Gas flow rate – m3/hr
1.7
2.3
3.1
4.4
5.5
Flue gas mass rate – g/sec
(@ 10.5% CO2)
16.7
23.2
31.6
44.2
55.4
Gas inlet connection size – “ B.S.P
½
½
¾ 1 1
WATER DATA
Water content – litres
348
352
469
473
477
Water connections (F & R) – “ B.S.P
1 ½
2
Max. water pressure (PMS) – bar
11.0
Maximum water temperature – C
80
FLUE DATA TYPE B23
Nominal flue diameter – mm
80
100
Maximum flue gas temp. – C
120
Maximum equivalent length – m
60
Equivalent length 90 bend – mm
1000
Equivalent length 45 bend – mm
500
Flue gas temperature – C
70
Flue draught requirements – mbar
-0.03 to -0.1
FLUE DATA TYPE C13 & C33
Nominal flue diameter – mm
80/125
100/150
Maximum flue gas temp. – C
120
Maximum equivalent length – m
30
13
Equivalent length 90 bend – mm
1000
Equivalent length 45 bend – mm
500
FLUE DATA TYPE C43 & C53
Nominal flue diameter – mm
80
100
Average flue gas temp. – C
(80/60 Flow/Return)
70
Maximum flue gas temp. – C
120
Maximum equivalent length – m
60*
Equivalent length 90 bend – mm
1000
Equivalent length 45 bend – mm
500
* On twin pipe systems, the maximum equivalent length is the sum the air inlet components and the exhaust
components.
TABLE 3.1 TECHNICAL DATA
8
9
FIGURE 3.1 ENCLOSURE INSTALLATION CLEARANCES (mm)
RECOMMENDED SERVICE
CLEARANCES:
TOP - 450mm
LEFT - 600mm
RIGHT - 100mm
FRONT - 600mm
REAR - 600mm
RESTRICTED HEIGHT
SERVICE CLEARANCES:
TOP - 100mm
LEFT - 600mm
RIGHT - 400mm
FRONT - 600mm
REAR - 600mm
RECOMMENDED SERVICE
CLEARANCES:
TOP - 450mm
LEFT - 600mm
RIGHT - 100mm
FRONT - 600mm
REAR - 600mm
RESTRICTED HEIGHT
SERVICE CLEARANCES:
TOP - 100mm
LEFT - 600mm
RIGHT - 400mm
FRONT - 600mm
REAR - 600mm
FIGURE 3.2 PLANT-ROOM INSTALLATION CLEARANCES (mm)
10
4.0 GENERAL REQUIREMENTS
The Lochinvar EcoShield condensing water heater has been designed to operate trouble free for many years.
These instructions should be followed closely to obtain the maximum usage and efficiency of the equipment.
PLEASE read the instructions fully before installing or using the appliance.
4.1 RELATED DOCUMENTS
It is law that all gas appliances are installed by competent persons, in accordance with The Gas Safety
(Installation and Use) Regulations 1998. Failure to install appliances correctly could lead to prosecution. It is in
your own interest, and that of safety, to ensure that this law is complied with.
The installation of the equipment MUST be in accordance with the relevant requirements of the Gas Safety
Regulations, Building Regulations, I.E.E. Regulations and the bylaws of the local water undertaking. The
installation should also be in accordance with any relevant requirements of the local gas distributor and local
authority.
In addition the installation should follow the relevant guidance offered in the following documents. It is not
practical to list all relevant information but emphasis is placed on the following documents, as failure to comply
with the guidance given will almost certainly result in an unsatisfactory installation:
BS EN 1858: 2003 Chimneys. Components. Concrete flue blocks
BS 5440-1: 2008 Flueing and ventilation for gas appliances of rated input not exceeding 70kW net
(1st, 2nd and 3rd family gases). Specification for installation of gas appliances to
chimneys and for maintenance of chimneys.
BS 5440-2: 2009 Installation and maintenance of flues and ventilation for gas appliances of rated input
not exceeding 70kW net (1st, 2nd and 3rd family gases). Specification for
installation and maintenance of ventilation for gas appliances
BS 6644: 2005 Specification for Installation of gas-fired hot water boilers of rated inputs between
70kW + A1:2008 (net) and 1.8MW (net) (2nd and 3rd family gasses)
BS 6700: 1997 Design, installation, testing and maintenance of services supplying water for
domestic use within buildings and their curtilages
BS 6880: 1988 Code of practice for low temperature hot water systems of output greater than 45kW
Parts 1, 2 and 3
BS 7074: 1989 Application, selection and installation of expansion vessels and ancillary equipment
for
Parts 1and 2 sealed systems
BS 7671: 2008 Requirements for electrical installations, I.E.E. wiring regulations Seventeenth
edition
CP 342: Code of practice for centralised hot water supply-buildings other than dwellings
Part 2 1974
IGE/UP/1: Installation pipework on industrial and commercial premises
Edition 2
IGE/UP/2: Gas installation pipework, boosters and compressors on industrial and commercial
Edition 2 premises
IGE/UP/4: Commissioning of gas-fired plant on industrial and commercial premises
Edition 2
11
IGE/UP/10: Installation of flued gas appliances in industrial and commercial premises
Edition 3
Gas Safety (Installation and Use) Regulations 1998
CIBSE: Guide parts A, B and C
H.S.E. guidance Automatically controlled steam and hot water boilers
note PM5:
Third edition of the 1956 Clean Air Act Memorandum on Chimney Heights
Manufacturer's notes must not be taken in any way as overriding statutory obligations.
5.0 WATER QUALITY
Water supply quality may adversely affect the efficiency and performance of water heaters and hot water systems.
The situation can intensify where higher temperatures or demands exist.
Water hardness should not exceed 205ppm CaCO3 and TDS (Total Dissolved Solids) of untreated water should
not exceed 350ppm. If these values are exceeded, contact Lochinvar Limited for further guidance.
6.0 LOCATION
6.1 PLANT ROOM REQUIREMENTS
The Lochinvar EcoShield may only be installed in a room that complies with the appropriate ventilation
requirements.
The Lochinvar EcoShield can be used as a type C13, C33, C43 or C53 appliance. Due to its room sealed design,
ventilation allowances for combustion air are not necessary, provided the minimum clearances and service
clearances as detailed in Figure 3.2 are observed. If the appliance is to be installed in a compartment or a hot
environment, the minimum clearances detailed in Figure 3.1 should be observed. In addition to this or to comply
with the recommendations in BS6644, ventilation for cooling purposes must be fitted. For further guidance, please
refer to Section 9 AIR SUPPLY or to BS5440-2 or BS6644 as appropriate.
The Lochinvar EcoShield can also be used as a type B23 appliance. If such a configuration is to be used, then
appropriate ventilation for cooling and combustion must be provided. For further details, please refer to Section 9
AIR SUPPLY or to BS5440-2 or BS6644 as appropriate.
6.2 GENERAL REQUIREMENTS
Corrosion of the heat exchanger and flue system may occur if air for combustion contains certain chemical
vapours. Such corrosion may result in poor combustion and create a risk of asphyxiation. Aerosol propellants,
cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium
chloride, waxes and process chemicals are corrosive. Products of this sort should not be stored near the water
heater or outside by the air intake (if applicable). The fitting of this equipment in a situation where aerosols or
other chemicals may be entrained into the combustion air will invalidate the warranty.
The equipment must be installed on a level surface that is capable of adequately supporting its weight (when filled
with water) and any ancillary equipment. The operation of the equipment must not cause the temperature of any
combustible material in the vicinity of the equipment and its flue to exceed 65°C. If such a situation is
unavoidable, appropriate insulation should be provided.
Locate the equipment so that if the appliance or any connecting pipework should leak, water damage will not
occur. When such locations cannot be avoided it is recommended that a suitable drain pan be installed under the
equipment. The pan should be adequately drained but must not restrict the combustion or ventilation airflow.
12
6.3 CLEARANCES
The location chosen for the equipment must permit the provision for a satisfactory flue system and, where
necessary, an adequate air supply. The location must also provide adequate space for servicing and air
circulation around each unit. This includes any electrical trunking laid across the floor and to the appliance.
See Figure 3.1 & Figure 3.2 for dimensions/clearances. Further details regarding locations are given in BS5440 or
BS6644 as appropriate.
6.4 CONDENSATE DRAIN
The condensate drain is located on the rear of the water heater. It is fitted with a ½” PVC tee and union, this
should be connected to an appropriate condensate drain, sloping continuously away from the water heater at an
angle of at least 3 (50mm per metre).
The Water Resources Act requires that trade effluent is discharged to municipal sewers between pH 6.5 and 10.0.
If it is determined that these levels cannot be achieved, an in-line condensate neutralisation kit is available from
Lochinvar Limited. This unit is capable of neutralising 4000 litres of condensate to a pH of 7.0 before releasing it
to a drain.
7.0 GAS SUPPLY
The Lochinvar EcoShield range is suitable for use on second and third family gasses 2H - G20 - 20mbar and 3P G31 - 37mbar. Details relating to Natural Gas (2H) appear below; for details relating to Propane (3P) please
refer to Section 14 LPG FUEL.
7.1 SERVICE PIPES
The local gas distributor must be consulted at the installation planning stage in order to establish the availability of
an adequate supply of gas. An existing service pipe must not be used without prior consultation with the local gas
distributor.
7.2 METERS
A new gas meter will be connected to the service pipe by the local gas distributor contractor. An existing gas
meter should be checked, preferably by the gas distributor, to ensure that it is adequate to deal with the rate of gas
supply required.
7.3 GAS SUPPLY PIPES
Supply pipes must be fitted in accordance with IGE/UP/2. Pipework from the meter to the equipment must be of
adequate size. The complete installation must be purged and tested as described in IGE/UP/1. Refer to Section
14 LPG FUEL for information on LPG pipework installation guidance.
7.4 BOOSTED SUPPLIES
Where it is necessary to employ a gas pressure booster, the controls must include a low-pressure cut-off switch at
the booster inlet. The local gas distributor must be consulted before a gas pressure booster is fitted. For details of
how to connect a low-pressure cut-off switch, please refer to Section 11 Electrical Supply
7.5 PLANT-ROOM CONTROL VALVE
A manual valve for plant-room isolation must be fitted in the gas supply line. It must be clearly identified and
readily accessible for operation, preferably by an exit.
13
7.6 EQUIPMENT GAS SYSTEM LEAK CHECK
Location
Description
SHW45-325CE
SHW60-325CE
SHW85-435CE
SHW115-435CE
SHW145-435CE
A
Directly below an opening, air brick, opening windows etc.
300
2000
B
Above an opening, air brick, opening windows etc.
300
1000
C
Horizontally to an opening, air brick, opening windows etc.
300
1000
D
Below a gutter or sanitary pipework
75
75
E
Below the eaves
200
200
F
Below a balcony or car port roof
200
200
G
From a vertical drain or soil pipe
150
150
H
From an internal or external corner
300
300
I
Above ground, roof or balcony level
300
300
J
From a surface facing the terminal
600
1000
K
From a terminal facing the terminal
1200
2000
L
From an opening in the car port (e.g. door, window) into the
dwelling
1200
1200
M
Vertically from a terminal on the same wall
1500
1500
N
Horizontally from a terminal on the same wall
300
600
P
From a vertical structure on the roof
300
300
Q
Above intersection with the roof
300
300
An approved gas-inlet appliance isolating valve and union should be installed for each unit in a
convenient and safe position and be clearly marked. Ensure that the gas-inlet appliance isolating valve is in
the OFF position. Although the equipment receives a gas leak check and gas train component integrity check
prior to leaving the factory, transit and installation may cause disturbance to unions, fittings and components.
During commissioning a further test for tightness should be carried out on the equipment gas pipework and
components.
Care must be taken not to allow leak detection fluid on or near any electrical parts or connections.
8.0 FLUE SYSTEM
FIGURE 8.1: FLUE TERMINAL POSITIONS
TABLE 8.1 FLUE TERMINAL MINIMUM DISTANCES
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8.1 FLUE SYSTEM GENERAL REQUIREMENTS
Detailed recommendations for the flue system are given in BS5440-1 for equipment of rated input not exceeding
70kW net, BS6644 for equipment above 70kW net and IGE/UP/10 for equipment of rated input above 54kW net.
The following notes are intended to give general guidance only.
8.2 APPROVED FLUE SYSTEM
The approved flue system is not suitable for use external to the building. If external routes cannot be
avoided, a flue system manufacturer should be consulted to supply a suitable alternative.
When used as a Type C (balanced flue) appliance, the approved, purpose designed adaptive flue system should
be used. For further details, please contact Lochinvar Limited.
When used as a Type B (conventional flue) appliance, a suitable flue system constructed of Stainless Steel or
Polypropylene with a temperature rating in excess of 120C should be used. Aluminium flue pipe must not be
used on this appliance as it may lead to premature failure of the heat exchanger and will invalidate the
warranty.
8.3 INSTALLATION PRECAUTIONS
The approved flue system is rated to 120C max. To prevent the exhaust temperature exceeding this,
the appliance is supplied with a flue gas temperature sensor. This must be fitted during the
installation of the flue system. Failure to do so may lead to severe personal injury, death or
substantial property damage.
The heater must not be operated unless the complete flue system is installed. This includes the water
heater connections, concentric adaptor (if required) flue pipes, air ducts (if required) and terminals. If
discharging at low level, a suitable flue guard must be installed.
Due to the condensing nature of the water heater, long external routes should be avoided to prevent the
condensate freezing within the flue system unless necessary precautions are taken to insulate the flue.
During assembly precaution should be taken to ensure that the internal sealing ring is seated correctly.
Due to the close tolerances in the flue system, it may be necessary to use a twisting action to fit the
joints together. No lubrication other than water should be used.
8.4 MAXIMUM LENGTH
Details of maximum flue lengths can be found in Table 3.1 Technical Data
8.5 FLUE DISCHARGE
The flue system must ensure safe and efficient operation of the equipment to which it is attached, protect the
combustion process from wind effects and disperse the products of combustion to open external air.
The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion
entering any opening in a building.
Under certain operating and weather conditions, the EcoShield heater may generate a plume at the terminal.
Consideration should be given to the nuisance this may cause and the terminal should be sited accordingly.
For further information on terminal locations, please refer to Figure 8.1 and Table 8.1.
8.6 CONDENSATE DRAIN
If the flue system rises at an angle of at least 3 (50mm per metre), no additional condensate drain will be
required. Failure to provide an adequate rise in the flue system may lead to pooling of condensate which may
lead to premature failure of the flue system.
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