andrews ECOflo Series Manual

INSTALLATION AND SERVICE MANUAL Part number E864
Andrews. Built to perform.
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.
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EC230/600, EC230/700, EC230/960, EC380/740, EC380/980, EC380/1220, EC380/1400 and EC380/1900
LEC230/600, LEC230/700, LEC230/960, LEC380/740, LEC380/980, LEC380/1220,
LEC380/1400 and LEC380/1900

2
Andrews Water Heaters
Reproduction of any information in this publication by any
method is not permitted unless prior written approval has been
obtained from Andrews Water Heaters.
Andrews Storage Water Heaters have been designed and
manufactured to comply with current international standards of
safety. In the interests of the health and safety of personnel and
the continued safe, reliable operation of the equipment, safe
working practices must be employed at all times. The attention
of UK users is drawn to their responsibilities under the Health
and Safety Regulations 1993.
All installation and service on Andrews Water Heaters must be
carried out by properly qualified personnel and, therefore, no
liability can be accepted for any damage or malfunction caused
as a result of intervention by unauthorised personnel.
Andrews Water Heaters’ policy is one of continuous product
improvement and, therefore, the information in this manual,
whilst completely up to date at the time of publication, may be
subject to revision without prior notice.
urther information and assistance can be obtained from:
Customer support
Monday - Friday
8am - 5pm
Sales: 0345 070 1055
Technical: 0345 070 1057
Email: [email protected]
Website: www.andrewswaterheaters.co.uk
Twitter: @andrewsWH
Copyright Andrews Water Heaters 2015
Issue 2 14/07/16
Note
The Andrews Water Heaters covered in this manual
are for use with natural gas or LPG (Propane) gas only

Issue 2 14/07/16 3
Contents
Contents
1 General and safety information
1.1 General information
1.2 British standards and codes of practice
1.3 Health and safety regulations 1993
1.4 Effectiveness in combating legionella
2 Technical data
2.1 ECOflo range
2.2 Dimensions and clearances
2.2.1 ECOflo models EC230/600, EC230/700, EC230/960
2.2.2 ECOflo models EC380/740, EC380/1220, EC380/1400, EC380/1900
2.3 ErP data
3 Installation
3.1 Introduction
3.2 Location
3.3 eatures
3.3.1 Main power ON/O switch
3.3.2 Combustion system
3.3.3 Ignition module
3.3.4 Adjustable thermostat
3.3.5 Condensate drain
3.3.6 Cleanout
3.3.7 Electrically powered anodes
3.3.8 Service panel
3.3.9 Access lid
3.4 Technical detail
3.4.1 Determining required flue length
3.5 Ignition system components
3.6 Thermostat and high limit controls
3.7 Heat exchanger
3.8 lue system
3.9 Water connections
3.10 Gas connections
3.11 Unpacking
3.12 Location
3.13 Remove crate
3.14 Location
3.15 Chemical vapour corrosion
3.16 Scalding
3.17 Typical propane bulk storage tank installation
3.18 Typical propane cylinder installation
3.19 Approximate time/temperature scald chart
3.20 Gas meter size natural gas only
3.21 Gas pressure regulation
3.22 Gas supply - natural gas
3.23 Gas supply - propane
3.24 Electrical supply
3.24.1 Wiring diagram
3.24.2 Schematic
3.25 lue systems
3.26 Optional conventional flue (open flue)
3.26.1 Maximum flue distances (horizontal or vertical)
3.27 Horizontal and vertical flue kits
3.27.1 Installation procedure
3.27.2 Horizontal flue kit/fittings - 230 litre models AWH part no: B291 supplied components
3.27.3 Vertical flue kit/fittings - 230 litre models AWH part no: B293 supplied components
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4 Issue 2 14/07/16
Contents
3.27.4 Horizontal flue kit/fittings - 380 litre models AWH part no: B292 supplied components
3.27.5 Vertical flue kit/fittings - 380 litre models AWH part no: B294 supplied components
3.28 lue systems
3.28.1 Optional components for 100/150mm dia (concentric) flue
3.28.2 ECOflo 380/1900 horizontal fittings pack - part no: B292
3.28.3 ECOflo 380/1900 vertical fittings pack - part no: B294
3.28.4 General
3.28.5 ECOflo 230 & 380 litre flue system
3.28.6 ECOflo 230 & 380 vertical/horizontal flue system
3.28.7 lue system typical installation
3.28.8 Installing the horizontal flue terminal
3.28.9 Installing the vertical flue terminal
3.28.10 Installing flue piping sections for both applications
3.29 Air supply and ventillation
3.29.1 Concentric flue systems
3.29.2 Air vents areas
3.30 Water quality and treatment
3.31 Water connections
3.31.1 Vented systems
3.31.2 Unvented systems
4 Commissioning
4.1 illing the heater with water
4.2 User’s safety guide
4.2.1 or your safety if you smell gas
4.2.2 or your safety
4.3 Air/gas mixture adjustment
4.3.1 G20 (natural gas, mostly methane) family
4.3.2 Propane gas models
4.4 CO2 percentage
5 Operating instructions
5.1 General instructions
5.1.1 To fill the water heater
5.1.2 Sequence of operation
5.2 Lighting instructions
5.2.1 or your safety read before lighting
5.2.2 Lighting instructions
5.2.3 To turn off the gas appliance
5.3 Temperature adjustment
5.4 Burner flame check
5.5 Eco (energy cut-off)
5.6 Temperature stratification (stacking)
5.7 Temperature selection procedure (auto-ignition)
5.7.1 Water heater display and control buttons
5.7.2 To increase setpoint temperature
5.7.3 To decrease setpoint temperature
5.7.4 To change temperature format in display from ° to °C or °C to °
5.8 Burner flame check
5.9 Hot surface
5.10 Direct spark
5.11 Thermostat and high limit
6 Servicing
6.1 Introduction
6.2 Pre-service operations
6.3 Annually
6.4 General
6.5 Maintenance schedule
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Issue 2 14/07/16 5
Contents
6.6 Correx powered anodes
6.7 lushing water heater
6.8 Draining water heater
6.9 illing water heater
6.10 Sediment and limescale
6.10.1 To remove sediment and limescale
6.11 To replace a correx anode
6.12 Drain valve and tank access panel
6.13 Cleaning the storage vessel
6.14 Descaling
6.15 Restart
6.16 Combined temperature/pressure relief value
6.17 Combustion system inspection
6.18 Accessing service mode on the water heater display (service personnel only)
6.18.1 Sequence of modes available in ‘service mode’ by pressing the ‘select’ button
6.18.2 To change the maximum setpoint limit (max setpoint) for the temperature setpoint
6.18.3 Display of water temperature
6.18.4 To display flame sense current of the pilot flame sensor
6.18.5 To display and change temperature setpoint
6.18.6 To display and change temperature format (° /°C)
6.19 How to reset the control from lockout conditions
6.19.1 Resetting error codes in soft lockout condition
6.19.2 Resetting error codes in hard lockout condition
6.19.3 Error codes and error history display
6.19.4 Error code history
6.19.5 To view previous error codes
6.20 Diagnostic error codes and troubleshooting procedures for Honeywell intergrated controls
(24 volt flue damper model series)
6.21 Procedure for checking thermostat sensors
7 Fault finding
7.1 Main power light is not on
7.2 Thermostat does not call for heat
7.3 Ignition module ‘power’ LED is not lit
7.4 an does not energise
7.5 Ignitor does not glow
7.6 Main valve does not turn on
7.7 Burner flame keeps going out
7.8 Thermostat does not satisfy
7.9 an did not post purge
8 Parts list and illustrations
8.1 EC230/600 to LEC380/1400 general assembly
8.2 EC380/1900 and LEC380/1900 general assembly
8.3 EC230/600 to LEC380/1400 combustion system assembly
8.4 EC380/1900 and LEC380/1900 combustion system assembly
8.5 EC230/600 to LEC380/1400 combustion surround
8.6 EC380/1900 and LEC380/1900 combustion surround
8.7 EC230/600 to LEC380/1400 ignition control system
8.8 EC380/1900 and LEC380/1900 ignition control assembly
8.9 Concentric flue component list (100/150mm dia.)
8.10 Unvented system kit B290 - parts list
9 Appendix
9.1 Dismantling, disposal and recycling
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6 Issue 2 14/07/16
1 General and Safety Information
The Andrews Water Heater has been designed for use with
NATURAL GAS OR LPG and is manufactured to give an
efficient, reliable and long service life.
To ensure the continued, trouble-free operation of your heater at
maximum efficiency, it is essential that correct installation,
commissioning, operation and service procedures are carried
out strictly in accordance with the instructions given in this
manual. By law, installation and commissioning of the heater
must be carried out by properly qualified personnel.
The heater(s) must be installed in accordance with the following
requirements:
The current GAS SA ETY (INSTALLATION AND USE)
REGULATIONS
The current BUILDING REGULATIONS
The WATER SUPPLY (WATER ITTINGS)
REGULATIONS 1999
Additionally, installation should be performed in
accordance with all relevant requirements of the Gas
Supplier, Local Authority and recommendations of the
British Standards and Codes of Practice detailed below.
BS 6700: Specification for design, installation,
testing and maintenance of services supplying
water for domestic use within buildings and
their curtilages. This standard supersedes the
following British Standards and Codes of
Practice: CP99, CP310, CP324, 202, CP342
Part 2, Centralised Hot Water Supply.
BS 5440: Installation of flues and ventilation for gas
appliances of rated output not exceeding
60kW.
Part 1: Specification for installation of flues.
Part 2: Specification for installation of ventilation
for gas appliances.
BS 5546: Installation of gas hot water supplies for
domestic purposes.
BS 6891: Installation of low pressure gas pipework
of up to 28mm in domestic premises.
BS 6644: Installation of gas fired water boilers of
rated inputs between 60kW and 2mW
BS 7206: Specification for unvented hot water
storage units and packages.
1.1 General description
1.2 British standards and codes of practice
1 General and safety information

Issue 2 14/07/16 7
General and Safety Information 1
Note
Consideration should be given to amendments or
updates to the above standards.
BS EN 806 (Parts 1 - 5) Specifications for installations
inside buildings conveying water for human
consumption.
BS EN 12897 Water supply. Specification for indirectly heated
unvented (closed) storage water heaters.
IGE/UP/1A,1B Strength/tightness testing and direct purging.
IGE/UP/2 Installation pipework.
IGE/UP/10 - 1 (Edition 4): Installation of gas appliances in
industrial and commercial premises.

8 Issue 2 14/07/16
1 General and Safety Information
Water systems in buildings have been associated with outbreaks
of Legionnaires’ Disease, particularly in health care facilities
where occupants are significantly more susceptible to infection.
In recognition of the risks in hospitals, a Code of Practice for the
Control of Legionella in Health Care premises has been issued
by the Department of Health (1991). Codes of Practice
applicable to other premises have been published by other
organisations, principally the Health and Safety Executive
(HS)(G70) and the Chartered Institute of Building Services
Engineers (CIBSE, TM13). All Codes of Practice draw attention
to the design and operation of water systems with reference to
avoidance of factors that favour colonisation by Legionella
bacteria. These factors include stagnation, lukewarm conditions
(20°C to 45°C) and the accumulation of debris, scale and
corrosion in the base of tanks and calorifiers.
Andrews Water Heaters have commissioned an independent
evaluation of their products to investigate their resistance to
build-up of Legionella bacteria.
Experiments were conducted to determine whether, following a
substantial challenge by legionella pneumophilia. After overnight
and stagnation, the system was rendered free from viable
recoverable legionella. It was found that at 61°C, following a
challenge of approximately 107 organisms per litre, within one
hour, more than 99.999% of organisms had been killed. After a
subsequent stagnation period, sampling did not reveal any
residual contamination. The design of the base of the water
heater precludes legionella colonisation, even after build-up of
debris. The burner positioning ensures that the water at the
bottom of the heater reaches the same, or higher, temperatures
as in the rest of the heater.
Based on data obtained through experiment, the Andrews Water
Heater can be described as legionella resistant as it is
considered unlikely that, at the temperature tested, the organism
would colonise the water heater and present a possible health
risk.
1.4 Effectiveness in combating egionella
It is the duty of manufacturers and suppliers of products for use
at work to ensure, so far as is practicable, that such products
are safe and without risk to health when properly used, and to
make available to users adequate information about their safe
and proper operation.
Andrews Water Heaters should only be used in the manner and
purpose for which they are intended and in accordance with the
instructions in this manual. Although the heaters have been
manufactured with paramount consideration to safety, certain
basic safety precautions highlighted in this manual must be
observed by the user.
It is imperative that all users of the heaters must be provided
with all the information and instruction necessary to ensure
correct and safe operation.
1.3 Health and safety regulations 1993

Issue 2 14/07/16 9
Technical Data 2
Model Reference – Natural Gas EC230/600 EC230/700 EC230/960 EC380/740 EC380/980 EC380/1220 EC380/1400 EC380/1900
Natural gas, category 1²H
Gas consumption G20 3.41m³/h 4.09m³/h 5.43m³/h 4.09m³/h 5.43m³/h 6.82m³/h 7.92m³/h 11.33m³/h
Heat input gross 36.6 kW 43.9 kW 58.3 kW 43.9 kW 58.3 kW 73.2 kW 85.0 kW 118.7 kW
Heat output 35.1 kW 41.3 kW 54.2 kW 43.0 kW 57.1 kW 71.0 kW 79.1 kW 116.0 kW
Supply pressure 20 mbar 20 mbar 20 mbar 20 mbar 20 mbar 20 mbar 20 mbar 20 mbar
Gross thermal efficiency (NG) 96% 94% 93% 98% 98% 97% 93% 94%
Model Reference – Propane LEC230/600 LEC230/700 LEC230/960 LEC380/740 LEC380/980 LEC380/1220 LEC380/1400 LEC380/1900
Propane, category I ³P
Gas consumption G31 1.39m³/h 1.67m³/h 2.22m³/h 1.67m³/h 2.22m³/h 2.78m³/h 3.12m³/h 4.46m³/h
Heat input gross 36.6 kW 43.9 kW 58.3 kW 43.9 kW 58.3 kW 73.2 kW 85.0 kW 117.2 kW
Heat output 35.1 kW 41.3 kW 54.2 kW 43.0 kW 57.1 kW 71.0 kW 79.1 kW 111.2 kW
Supply pressure 37 mbar 37 mbar 37 mbar 37 mbar 37 mbar 37 mbar 37 mbar 37 mbar
Gross thermal efficiency (propane) 96% 94% 93% 98% 98% 97% 96% 94%
echnical details (Natural Gas & Propane)
NOx Level 25ppm 25ppm 25ppm 25ppm 25ppm 25ppm 25ppm 25ppm
44mg/kW 44mg/kW 44mg/kW 44mg/kW 44mg/kW 44mg/kW 44mg/kW 44mg/kW
Noise level (a) 51dBA 51dBA 51dBA 51dBA 51dBA 51dBA 51dBA 51dBA
Recovery rate thru’ 50°C 600 ltrs/hour 700 ltrs/hour 960 ltrs/hour 740 ltrs/hour 980 ltrs/hour 1220 ltrs/hour 1400 ltrs/hour 1900 ltrs/hour
Storage recovery time @ 50°C rise 23 mins 20 mins 14 mins 31 mins 23 mins 19 mins 16 mins 12 mins
Concentric flue size (b) 100/150mm 100/150mm 100/150mm 100/150mm 100/150mm 100/150mm 100/150mm 100/150mm
Maximum flue run (concentric) (b) 16 metres 16 metres 16 metres 16 metres 16 metres 16 metres 16 metres 16 metres
Cold Inlet water connection 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP
Hot outlet water connection 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP 1½”BSP
Drain port connection ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP
Secondary return connection ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP
Operating pressure (unvented) 3.5 bar 3.5 bar 3.5 bar 3.5 bar 3.5 bar 3.5 bar 3.5 bar 3.5 bar
Max. working water pressure (vented) 10.3 bar 10.3 bar 10.3 bar 10.3 bar 10.3 bar 10.3 bar 10.3 bar 10.3 bar
Max. working water pressure (unvented) 5.5 bar 5.5 bar 5.5 bar 5.5 bar 5.5 bar 5.5 bar 5.5 bar 5.5 bar
Water test pressure 20.7 bar 20.7 bar 20.7 bar 20.7 bar 20.7 bar 20.7 bar 20.7 bar 20.7 bar
Gas connection (gas cock supplied) ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP ¾”BSP 1”BSP
Electrical supply 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz
Power consumption 120W 120W 210W 120W 210W 210W 210W 210W
Fuse 5amp 5amp 5amp 5amp 5amp 5amp 5amp 5amp
Weight empty 225kg 225kg 225kg 385kg 385kg 385kg 385kg 385kg
Weight full 450kg 450kg 450kg 760kg 760kg 760kg 760kg 760kg
Shipping weight 259kg 259kg 259kg 408kg 408kg 408kg 408kg 408kg
Shipping dimension – depth 889mm 889mm 889mm 889mm 889mm 889mm 889mm 889mm
Shipping dimension – width 819mm 819mm 819mm 819mm 819mm 819mm 819mm 819mm
Shipping dimension – height 1664mm 1664mm 1664mm 2197mm 2197mm 2197mm 2197mm 2197mm
(a} Noise level measure at 2m from flue terminal.
(b) Reduce flue length by 1.2m for 90° bend, 0.7m for 45° and
1.5m for condense trap.
2.1 ECOflo Range
2 Technical data

10 Issue 2 14/07/16
2 Technical Data
1359
1334
1080
1016
330
Flue exhaust/
condense outlet
Cleanout
access
Rightside of plinth must not protrude
past edge of heater outer casing
330
150
1448
T&P Valve
connection
3/4"BSP Gas connection
Combustion air inlet
11/2"BSP Hot
water outlet
11/2" BSP Cold
water outlet
Drain/secondary
return
connection
718 dia.
ON/OFF Switch
Thermostat knob
NB: Unit must be installed on
minimum 150 mm high plinth
100 mm
clearance
Flue exhaust outlet
210
500mm Clearance for
ue system
3/4"BSP Gas connection
Combustion air inlet
T&P Valve connection
Flue exhaust/
condense outlet
Cleanout access
T&P Valve connection
3/4"BSP Gas
connection
C ombustion air inlet
11/2"BSP Hot
water outlet
11/2"BSP Cold
water outlet
Drain/secondary
return connection
ON/OFF Switch
Thermostat knob
450mm service clearance
1899
1857
1588
1524
330
Flue exhaust/
condense
outlet
Cleanout
access
Right side of plinth must not protrude
past edge of heater outer casing
330
150
1972
T&P Valve
connection
3/4" BSP Gas connection
Combustion air inlet
11/2" BSP Hot
water outlet
11/2" BSP Cold
water outlet
Drain/secondary
return
connection
718 dia.
ON/OFF Switch
Thermostat
knob
NB: Unit must be installed on
minimum 150 mm high plinth
100 mm
Clearance
Flue exhaust outlet
210
500mm Clearance for
ue system
3/4" BSP Gas connection
Combustion air inlet
T&P Valve connection
Flue exhaust/
condense outlet
Cleanout access
T&P Valve connection
3/4" BSP Gas connection - 1” BSP for EC380/1900
Combustion air inlet
11/2" BSP Hot water outlet
11/2" BSP Cold water
outlet
Drain/secondary return
connection
ON/OFF Switch
Thermostat knob
450mm service clearance
2.2 Dimensions and clearances
2.2.1 ECOflo models EC230/600, EC230/700 &
EC230/960
2.2.2 ECOflo models EC380/740, EC380/980,
EC380/1220, EC380/1400 & EC380/1900
Fig. 1
Fig. 2

Issue 2 14/07/16 11
Technical Data 2
2.3 ErP data
ECOflo Natural Gas 230/600 230/700 230/960 380/740 380/980 230/600 230/700 230/960 380/740 380/980
PG PG PG PG PG
Declared load profile XXL XXL XXL XXL XXL XXL XXL XXL XXL XXL
Water heating energy efficiency class
Water heating energy efficiency % 96 90 90 91 93 96 90 90 91 93
Annual energy consumption kwh(1) 16 27 20 27 21 16 27 20 27 21
Annual energy consumption Gj(2) 24 21 21 21 21 24 21 21 21 21
Other load profiles for which the water heater is - - - - - - - - - -
suitable to use and the corresponding water
heating energy efficiency and annual electricity
consumption(3)
Thermostat temperature setting °C 60 60 60 60 60 60 60 60 60 60
Sound power level LWA indoors dB 52 56 55 53 62 52 56 55 53 62
Ability to off-peak hours functioning(3) - - - - - - - - - -
Enables smart control settings(4) - - - - - - - - - -
(1) Electricity
(2) uel
(3) If applicable.
(4) If smart control settings value is "1", the water heating energy efficiency and annual electricity and fuel consumption only relate to enabled smart control settings.
A
A
A
A
A
A
A
A
A
A
ECOflo PG 230/600 230/700 230/960 380/740 380/980 380/1220 380/1400 380/1900
Daily electricity consumption Qelec kWh 0.065 0.074 0.056 0.073 0.057 0.045 0.038 0.028
Declared load profile XL XXL XXL XXL XXL XXL XXL XXL
Sound power level, indoors LWA dB 52 56 55 53 62 60 57 61
Daily fuel consumption Qfuel kWh 19.913 27.097 26.898 26.511 26.260 27.724 27.587 26.639
Emissions of nitrogen oxides NOx mg/kWh 44 44 44 44 44 44 44 44
Weekly fuel consumption Qfuel, week, smart kWh - - - - - - - -
with smart controls
Weekly electricity consumption Qelec, week, smart kWh - - - - - - - -
with smart controls
Weekly fuel consumption Qfuel, week kWh - - - - - - - -
without smart controls
Weekly electricity consumption Qelec, week kWh - - - - - - - -
without smart controls
Storage volume V I 230 230 230 380 380 380 380 380
Mixed water at 40 °C V40 I ∞ 500 ∞ ∞ ∞ ∞ ∞ ∞
Harmonised standards applied EN: 13203-2
Specific precautions that shall Before any assembly, installation or maintenance the installation and operation manual
be taken when the water has to be read attentively and to be followed
heater is assembled, installed
or maintained:
ECOflo Natural Gas 230/600 230/700 230/960 380/740 380/980 380/1220 380/1400 380/1900
Daily electricity consumption Qelec kWh 0.065 0.074 0.056 0.073 0.057 0.045 0.038 0.028
Declared load profile XL XXL XXL XXL XXL XXL XXL XXL
Sound power level, indoors LWA dB 52 56 55 53 62 60 57 61
Daily fuel consumption Qfuel kWh 19.913 27.097 26.898 26.511 26.260 27.724 27.587 26.639
Emissions of nitrogen oxides NOx mg/kWh 44 44 44 44 44 44 44 44
Weekly fuel consumption Qfuel, week, smart kWh - - - - - - - -
with smart controls
Weekly electricity consumption Qelec, week, smart kWh - - - - - - - -
with smart controls
Weekly fuel consumption Qfuel, week kWh - - - - - - - -
without smart controls
Weekly electricity consumption Qelec, week kWh - - - - - - - -
without smart controls
Storage volume V I 230 230 230 380 380 380 380 380
Mixed water at 40 °C V40 I ∞ 500 ∞ ∞ ∞ ∞ ∞ ∞
Harmonised standards applied EN: 13203-2
Specific precautions that shall Before any assembly, installation or maintenance the installation and operation manual
be taken when the water has to be read attentively and to be followed
heater is assembled, installed
or maintained:

12 Issue 2 14/07/16
3 Installation
THE AW REQUIRES THAT INSTA ATION IS CARRIED
OUT BY A PROPER Y QUA IFIED PERSON
Installations must be carried out in accordance with Gas Safety
(Installation and Use) Regulations 1998, Building Regulations,
The Water Supply (Water ittings) Regulations 1999 and any
requirements of the local Gas Supplier, Local Authority, Water
and ire Authorities and the current British Standards and
Codes of Practice listed in Section 1.
The location selected for installation of the water heater must
allow the provision of a satisfactory flue, adequate air supply,
drain facilities and must be well illuminated.
A purpose built boiler room or compartment is strongly
recommended.
A manual valve for isolation of the plant room should be installed
in the gas supply; it should be clearly identified and readily
accessible for use at all times.
If a purpose built plant room is not available, measures should
be taken to protect the water heater from damage and prevent
any extraneous matter from being stored on or around the water
heater. See BS 6644 Clauses 4, 5 and 6 for details.
The water heater must not be installed in any location
which contains a bed, bath or shower. There must be
easy access to the plant room and water heater at all
times.
The water heater must be located in an area where leakage
from the tank, water connections or the combination
temperature and safety valve will not result in damage to the
area adjacent to the water heater. When such locations cannot
be avoided, a suitable drain tray must be installed under the
water heater. The drain tray must be no deeper than 38mm
(1.5in) and have a minimum length and width of 100mm (4in)
wider than the heater. The drain tray must be piped to an
adequate drain using 20mm (0.75in) diameter pipe, angled for
proper drainage.
Access must be provided around the water heater to provide
adequate clearance for its servicing and operation.
The floor and plinth on which the heater is installed must be flat,
level and of sufficient strength to withstand the weight of the
heater when filled with water, and should satisfy the
requirements of the Local Authority & Building Regulations.
Any combustible material adjacent to the heater must be placed
and shielded as to ensure that its temperature does not exceed
66°C (150° ).
All service clearances for the water heater must be maintained
as specified in this Installation Manual.
3.1 Introduction
3.2 ocation
3 Installation

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Installation 3
ECOflo is the latest addition to the Andrews range of
condensing storage water heaters and is designed for large
domestic, commercial and industrial applications.
The high efficiency units incorporate Vitraglas® silica glass
lined tanks to provide protection against the corrosive
effect of hot water and therefore a longer working life.
The condensing glass-lined ultra high thermal efficiency
storage water heater features a low NOx pre-mix power
burner that is quiet in operation, a 98% gross efficiency that
keeps running costs to a minimum and flueing
arrangements that offer unsurpassed installation flexibility.
ECOflo – A new standard in condensing storage water
heating
The ECOflo range comprises eight models in two storage
capacities – 230/380 litres – with heat outputs ranging from
35kW to 79kW and recovery rates of up to 1400 litres/hour
through a temperature rise of 50°C. A thermal efficiency rate of
up to 98% gross puts ECOflo at the top of the class and leads to
greater economy. In addition to outstanding performance
characteristics, all ECOflo models can be flued either vertically
or horizontally as room sealed balanced flue appliances, using
concentric flue components supplied by Andrews, offering the
ultimate in siting and installation flexibility. All models incorporate
Correx Powered (maintenance free) Anodes as standard which
substantially reduce service time and costs. The factory fitted
Hydrojet® sediment reduction system on the cold inlet
connection helps to prevent sediment build-up at the base of the
tank, giving a longer and more efficient working life.
This water heater contains the following features:
3.3.1 Main Power ON/OFF Switch
The front panel of this water heater has an O switch, which is
lit when the main power is turned on to indicate power to the
water heater. On the EC380/1900 model the ON/O switch is
illuminated and is lit to indicate power to the heater.
3.3.2 Combustion System
The ECOflo is equipped with a self-compensating, negative
pressure pre-mix combustion system. As the blower operates,
air is drawn in through the air intake and into a venturi, which
pulls gas from the gas valve. The gas and air is then mixed in
the combustion blower and sent through the transition tube into
the burner. The System then ignites the gas/air fuel mixture to
produce the flue products (combustion). The flame sensor
signals the ignition module, (described below) that a flame is
present. The EC 380/1900 model has a hot surface ignition
probe.
3.3 Features

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3 Installation
3.3.3 Ignition Module
The ignition module provides the timing for the combustion
system. A sequence of operation (SOP) is described in “Section
5 – Operating Instructions.” As the combustion system
progresses through the SOP, LED’s illuminate, allowing accurate
trouble-shooting should the need arise. If a failure occurs, the
system will “blink” the LED that corresponds to the failure as
described in the “Section 6 – Troubleshooting Guide.”
3.3.4 Adjustable Thermostat
The ECOflo is equipped with an adjustable thermostat to control
water temperature. Hot water temperatures required for kitchen
sinks, sluices, cleaners’ sinks and wash down applications can
cause scald burns resulting in serious personal injury and/or
death.
The temperature may be adjusted from approximately 27°C to
82°C. It is recommended that lower temperatures be used to
avoid the risk of scalding. (Refer to the “Warnings” and the
section on SCALDING in “Section 3 – Water Connections.”) It is
further recommended, in all cases, that the water temperature
be set for the lowest temperature, which satisfies hot water
needs. This will also provide the most energy efficient operation
of the water heater and minimises scale formation.
The top immersion well of the single bulb controller also
contains the high limit (energy cut-off) sensor. The high limit
switch interrupts the main burner gas flow should the water
temperature reach approximately 93°C.
Should the high limit switch activate, it must be manually reset.
This can be accomplished by depressing the red button on the
control panel once the water temperature of the tank has
dropped below 71°C.
Please contract Andrews Water Heaters (details listed on the
Data Plate) if continued high limit switch operations occur.
3.3.5 Condensate Drain
The ECOflo is a condensing type unit and requires a drain to be
located in close proximity to allow the condensate to drain
safely. The condensate drains from the unit at the base of the
exhaust tee piece located near the bottom of the unit. The
exhaust tee is provided with a 32mm dia connection. A
condense siphon is supplied in the flue kit which should be
connected to the 32mm connection at the base of the exhaust
tee. The siphon outlet must be connected to a 40mm dia OD
plastic waste system. If the condense is allowed to build-up then
the exhaust outlet will become blocked and cause improper
operation of the water heater. The water heater will need to be
raised off the floor, on a concrete slab or base, to utilise a low
profile condensate pump to allow free drainage of condensate
from the outlet fitting. The condensate plastic drain pipe
installation should slope to a suitable drain.

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Installation 3
3.3.6 Cleanout
All models are equipped with a cleanout opening to aid the
removal of hard water deposits from the tank bottom. If this
water heater operates under hard water conditions, the following
should be performed at least every 3 months: Turn off water
supply and drain the water heater. Remove the cleanout jacket
cover and tank cover. When cleaning the tank, care must be
taken to avoid trying to break deposits loose as this could
damage the glass lining and shorten the life of the water heater.
After cleaning, re-install the cleanout tank cover and jacket
cover, and refill with water. Refer to the section, “Section 6 –
Maintenance” in this Installation and Operating Instruction
manual for the procedures for filling and draining the water
heater.
3.3.7 Electrically Powered Anodes
All models are supplied complete with Andrews’ Correx Powered
Anode system. The anodes are non-sacrificial and therefore do
not require any maintenance or replacement. or this reason,
the service clearance required above the water heater can be
reduced quite significantly. Correx anodes require a permanent
power supply, this is all pre-wired and the anode system can be
located at the top of the heater, beneath the top cover.
3.3.8 Service Panel
The service panel is located behind the service panel access
cover, which is located by the exhaust outlet tee piece near the
bottom of the water heater. This panel contains a pressure
switch to monitor for excess pressure in the exhaust pipe from a
blocked vent condition. A collector high limit switch is used to
monitor the ambient temperature between the first pass collector
and the exhaust collector. This is a manually re-settable switch.
If this switch continues to trip, please contact Andrews Water
Heaters.
3.3.9 Access id
Access for servicing the water heater from the top is easy.
Remove the two latches and the metal screw at the front centre
of the top to remove the lid for accessing the heater controls.
The lid must be replaced and re-latched upon completion of
servicing.

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3.4 Technical detail
Thermal Efficiency up to 98.0% – ully condensing design.
Three Pass Flue System – The three pass flue system keeps
the hot combustion gases moving at a high velocity. The
combination of high turbulence and velocity causes an
enormous rate of heat transfer into the water.
ow NOx Premix Power Burner – Developed for the ECOflo
Range, a turbulent flame shoots down the submerged
combustion chamber. This turbulence causes a thorough mixing
of the gas and air for optimum combustion and high heat
transfer efficiencies.
Submerged Combustion Chamber – Submerging the
combustion chamber in the centre of the water storage tank
minimizes radiant heat loss and improves efficiency.
Non-CFC foam insulation – Surrounds the tank surface, saving
energy by reducing heat loss.
Electronic Controls – Adjustable electronic thermostat 27°-
82°C recycling Energy Cut Off (E.C.O) shuts off all gas in event
of an overheat condition.
Zero Inch Clearance – The ECOflo external jacket is cool to the
touch and is approved for zero inches to combustibles for
unsurpassed installation flexibility.
Vitraglas® lined tank – Andrews Water Heater tanks are
protected from the corrosive effects of hot water by an exclusive
ceramic porcelain-like coating. Our high silica Vitraglas® lining
provides a tough interior surface.
Electrically powered anodes – Each ECOflo product is
supplied with a factory fitted Andrews Correx Powered Anode
system. This significantly reduces service time due to the
anodes being maintenance free.
Factory installed Hydrojet® Sediment Reduction
System – Cold inlet sediment reduction device made of
stainless steel for increased durability. Helps prevent sediment
build up in tank.
Factory installed dielectric fittings – All heaters are equipped
with special water heater nipples for longer heater life. No
special dielectric fittings to buy.
Flexible fluing – The ECOflo range can be flued vertically or
horizontally with the Andrews 100/150mm concentric flue pipe
system.
The maximum flue run length is sixteen metres from the
appliance connector to the terminal

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Installation 3
The overall length is reduced if an elbow or condensate trap is
fitted (see below).
3.4.1 Determining required flue length
1. Determine the total length of straight concentric flue
pipe (in metres) required for the installation.
2. Add 1.2 metres of flue for every 90°C elbow.
3. Add 0.7 metres of flue for every 45°C elbow.
4. Add 1.5 metres for condensate trap.
5. Total flue length cannot exceed “Maximum Length” in
the above paragraph.
Three year limited warranty on storage tank
– Heavy gauge steel automatically formed, rolled and welded to
assure a continuous seam for glass lining.
One year limited warranty on parts
enwal 35-655305-121 Hot Surface Ignition Control, CE listed. 3
Trials for Ignition, 15 second pre-purge timing, 15 second igniter
heat up time, 4 second trial for ignition, 24 volt input to control.
Omron G2R-1A-T-AC24 relays (VDE listed) used for high
voltage switching of hot surface igniter and combustion blower
from the 24 volt outputs of the enwal control.
Saint Gobain 230 volt hot surface mini igniter.
Honeywell VK8115 gas valve (negative pressure regulator)
with matched venturi sizes for mixing gas with combustion air.
EBM RG130 (36-6 and 43-9 kW/hr input sizes) and RG148 (58-
3 through 85-0 kW/hr. inputs) pre-mix combustion blowers. 230
volts, 50/60 Hz.
Burner: Acotech (Bekaert Combustion Technology) Premix
burner with stainless steel mesh outside knit.
Blocked Vent Pressure Switch: Honeywell IS20378-5770
normally closed pressure switch. Contacts open in the event of a
severe blockage of the flue outlet.
Honeywell L6189A 2043B aquastat. Temperature adjustment
range: Below 40°C to maximum of 82°C (dial stop to limit
maximum temperature). Differential set to 4°C Capillary bulb
inserts into well in top of tank. Thermostat dial adjustable on top
front section of water heater jacket.
Honeywell L6189C 2023 1 High limit control. Set point
fixed to 93°C with screw. Mounted to control panel inside
control compartment. Capillary bulb inserts into separate
well in top of tank. Manual reset control button accessible
through clearance hole in control panel.
3.5 Ignition system components
3.6 Thermostat and high limit controls
Note
Do not include the flue terminals in determining maximum
flue installation length.

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Burner fires down into 8” diameter flue tube transferring the
radiant heat from the burner flame into the tank water.
1st Pass lue Collector: At the bottom of the tank, a refractory
lined heavy gauge flue collector re-directs the flue gases from
the 8” flue tube to pass through two 4” diameter flue tubes to the
top of the tank.
4” diameter flue tubes have stainless steel baffles to turbulate
the flue gases to improve heat transfer.
2nd Pass lue Collector: At the top of the tank, the flue gases
from the 4” flue tubes collect in a heavy gauge steel collector to
redirect the flue gases down eight 2” diameter flue tubes.
2” diameter flue tubes are glass lined on the inside as well as
outside to prevent corrosion from flue gas condensate. Stainless
steel flue baffles inside the 2” flue tubes turbulate the flue gases
to aid heat transfer. lue temperatures are reduced from 260-
340°C from the second pass collector to 54°C or less in the flue
exhaust.
3rd Pass Collector: The flue gases from the bottom of the 2” flue
tubes are collected at the bottom of the tank in a stainless steel
flue collector, where the exhaust gases and condensate exit out
through a short Stainless Steel pipe extending outside the jacket
that connects to the coaxial concentric flue system.
A condensate tee with a silicone seal is connected to the plastic
exhaust pipe and interfaces with the flue system. The tee
connection has a 32mm condensate drainpipe connection to
allow the siphon to be fitted. The waste pipe will then be taken
from the siphon outlet to drain.
A section of aluminium flue pipe will run to the top of the water
heater to connect to the air intake tee.
The intake tee adapts to the concentric flue pipe and has an
elbow to connect to the combustion air intake pipe.
The 100/150 mm dia. Andrews’ concentric flue pipe will then run
to the horizontal or vertical flue terminal.
Maximum concentric flue for this product is 16 metres. Each
additional 90° elbow is equivalent to a reduction of 1.2 metres of
straight flue pipe.
Each additional 45° elbow is equivalent to a reduction of 0.7
metres of straight flue pipe. If a condensate trap is installed, this
is equivalent to a reduction of 1.5 metres of straight flue pipe.
ront hot and cold 1½” BSP (male) water supply connections.
3.7 Heat exchanger
3.8 Flue system
3.9 Water connections

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Installation 3
3.10 Gas connections
¾” Gas Inlet Nipple for BSP connection to gas supply.
1” Gas Inlet Nipple for BSP connection to gas supply for the
EC380/1900 model.
INSPECT SHIPMENT CAREFU Y FOR ANY SIGNS OF
DAMAGE
1. All equipment is carefully manufactured, inspected and
packed.
2. Any claims for damage or shortage in shipment must be
filed immediately with Andrews Water Heaters as
detailed on the warranty card
Locate water heater in front of final position before
removing crate.
1. LOCATE so the flue installation connections will be as
short and direct as possible.
2. THIS WATER HEATER IS NOT SUITABLE OR
INSTALLATION ON A COMBUSTIBLE LOOR. Do not
install this water heater on carpeting.
3. OR EVERY INSTALLATION, provide a solid level elevated
base such as concrete or other suitable pad to raise the
water heater at least 150mm to provide a slope for the
condensate waste to run to a suitable drain.
4. Minimum clearance to combustible material is 0” for the Top,
Sides and Rear of this water heater. However, it is
recommended that at least 450mm from the Top, 600mm
from the ront, 100mm from the Left Side and Rear, and
500mm from the Right Side edge of the water heater be
provided for servicing and ease of installation.
1. Remove all banding and pry off crate sides carefully so as
not to damage the water heater.
2. Carefully roll/lift the water heater from the crate base.
MOVE WATER HEATER TO PERMANENT POSITION
by sliding or walking. Place on plinth/base as detailed
previously.
3.11 Unpacking
3.12 ocation
3.13 Remove crate
Caution
Do not drop water heater. Do not bump water heater
jacket against floor.
Do not bump exhaust flue pipe against crate or other
objects. This will damage the heater and cause it to be
inoperable or create nuisance problems.
See
Section 2, page 10 for diagram. Clearance for
servicing may be reduced down to minimum clearance to
combustible material, but service time and effort may be
greatly increased.

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3.14 ocation
KEEP APP IANCE AREA C EAR AND FREE OF
COMBUSTIB E MATERIA S, PETRO AND OTHER
F AMMAB E VAPOURS AND IQUIDS.
This water heater MUST be installed indoors.
This water heater MUST be located in an area where the
general public does not have access.
Corrosion of the internal flue ways and concentric flue system
will occur if air for combustion contains certain chemical
vapours. Such corrosion may result in poor combustion and
create a risk of asphyxiation, as well as reducing the life of the
water heater. Spray can 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).
This water heater can deliver scalding temperature water at any
outlet in the system. Be careful whenever using hot water to
avoid scalding injury. To protect against injury, you should install
approved mixing valves in the water system. This valve will
reduce point of discharge temperature by mixing cold and hot
water in branch supply lines. Such valves are available from
your local plumbing supplier.
3.15 Chemical vapour corrosion
3.16 Scalding