Eco-King HWB-299 Manual

Installation and service manual
High efficiency condensing water heaters.
California Proposition 65 Warning: This product contains chemicals known to the State of
California to cause cancer, birth defects, or other reproductive harm.
— Do not store or use gasoline or other flam-
mable vapours and liquids in the vicinity of
this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbour’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the fire department.
— Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
WARNING: If the information in this man-
ual is not followed exactly, a fire or explo-
sion may result causing property damage,
personal injury or loss of life.
— Ne pas entreposer ni utiliser d'essence
ou ni d'autres vapeurs ou liquides inflam-
mables à proximité de cet appareil ou de
tout autre appareil.
— QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ :
•Ne pas tenter d’allumer d’appareils.
•Ne touchez à aucun interrupteur. Ne pas
vous servir des téléphones dans le bâtiment
où vous vous trouvez.
•Appelez immédiatement votre fournisseur
de gaz depuis un voisin. Suivez les instruc-
tions du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le service des incendies.
L'installation et l'entretien doivent être as-
surés par un installateur ou un service
d'entretien qualifié ou par le fournisseur
de gaz.
AVERTISSEMENT. Assurez-vous de
bien suivre les instructions données dans
cette notice pour réduire au minimum le
risque d'incendie ou d'explosion ou pour
éviter tout dommage matériel, toute bles-
sure ou la mort.
This manual must be
left with owner and
must be hung on or
adjacent to the water
heater for reference.
HWB-299
HWB-399
HWB-499

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TABLE OF CONTENTS
1SAFETY GUIDELINES ......................................................................................................................... 7
2INTRODUCTION................................................................................................................................. 11
EXPLANATIONS. ......................................................................................................................... 11
MAINTENANCE AND INSPECTION.................................................................................................. 11
FOR INSTALLATIONS IN THE COMMONWEALTH OF MASSACHUSETTS.............................................. 12
IMPORTANT TECHNICAL WARNINGS AND GUIDELINES .................................................................... 13
PRESSURE RELIEF VALVE............................................................................................................ 14
3TECHNICAL DATA WATER HEATERS............................................................................................ 16
FUNCTIONAL INTRODUCTION....................................................................................................... 16
LOCATION OF VERSION NUMBERS................................................................................................ 16
TECHNICAL SPECIFICATIONS DATASHEET..................................................................................... 17
HIGH ALTITUDE OPERATION......................................................................................................... 18
4WATER HEATER DIMENSIONS........................................................................................................ 19
HWB-299 ................................................................................................................................. 19
HWB-399 ................................................................................................................................. 20
HWB-499 ................................................................................................................................. 21
5ACCESSORIES AND UNPACKING................................................................................................... 22
ACCESSORIES............................................................................................................................ 22
UNPACKING ............................................................................................................................... 22
6INSTALLATION LOCATION OF THE HWB ...................................................................................... 23
INSTALLATION CLEARANCES ....................................................................................................... 23
WATER HEATER INSTALLATION LOCATION REQUIREMENTS:.......................................................... 24
MOUNTING THE WATER HEATER .................................................................................................. 25
7CONNECTIONS.................................................................................................................................. 26
WATER HEATER CONNECTIONS ................................................................................................... 26
GAS PIPE CONNECTION............................................................................................................... 26
7.2.1 Gas line connection .................................................................................................... 26
CONDENSATE DRAIN CONNECTION .............................................................................................. 27
NON-RETURN VALVE................................................................................................................. 28
PUMP FUNCTIONALITY ................................................................................................................ 28
FROST PROTECTION................................................................................................................... 28
WATER QUALITY......................................................................................................................... 29
FLUSH THE SYSTEM WITH FRESH WATER...................................................................................... 29
AUTOMATIC AIR PURGING OF THE HEAT EXCHANGER .................................................................... 29
WATER PRESSURE..................................................................................................................... 30
8THE HWB SANITAIRY SYSTEM: INSTALLATION INSTRUCTIONS .............................................. 31
THE HWB SYSTEM..................................................................................................................... 31
8.1.1 Stand-alone set-up...................................................................................................... 31
8.1.2 Cascade set-up........................................................................................................... 32
8.1.3 Pump control............................................................................................................... 33
8.1.4 Tank sensor ................................................................................................................ 33
8.1.5 System Sensor in case of cascading heaters............................................................. 33
8.1.6 Return and Supply piping Tank .................................................................................. 33
9HEATEXCHANGER RESISTANCE GRAPHS................................................................................... 34
HYDRAULIC GRAPHS................................................................................................................... 34
9.1.1 Water heater resistance graph HWB-299................................................................... 34
9.1.2 Water heater resistance graph HWB-399................................................................... 34
9.1.3 Water heater resistance graph HWB-499................................................................... 35
MINIMUM REQUIRED PUMP HEAD................................................................................................. 35
PUMP:MAXIMUM ELECTRICAL POWER.......................................................................................... 36
10 FLUE GAS AND AIR SUPPLY SYSTEM........................................................................................... 37
GENERAL VENTING..................................................................................................................... 37
10.1.1 Vent sizing. ................................................................................................................. 37
10.1.2 Vent and air inlet resistance table............................................................................... 38
VENT AND AIR INTAKE PIPE MATERIAL .......................................................................................... 38
10.2.1 Approved manufacturers............................................................................................. 39

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PVC/ CPVC.............................................................................................................................. 40
10.3.1 Instructions for working with cementing PVC/ CPVC pipe connections:.................... 41
POLYPROPYLENE....................................................................................................................... 42
10.4.1 Flexible polypropylene................................................................................................ 43
10.4.2 Stainless steel vent..................................................................................................... 43
SEALED COMBUSTION AIR SUPPLY.............................................................................................. 44
10.5.1 Combustion air quality ................................................................................................ 44
10.5.2 Air supply through humid areas.................................................................................. 44
10.5.3 Air intake/vent connections......................................................................................... 44
10.5.4 Air inlet pipe materials................................................................................................. 45
ROOM AIR.................................................................................................................................. 46
10.6.1 Air contamination........................................................................................................ 46
PROPER VENT INSTALLATION AND TYPE OF GAS VENT OR VENT CONNECTOR.................................. 47
INSTALL VENT AND COMBUSTION AIR PIPING................................................................................. 48
REQUIREMENTS FOR INSTALLATION IN CANADA............................................................................ 48
DIRECT VENTING OPTIONS.......................................................................................................... 49
WALL (HORIZONTAL)DIRECT VENTING......................................................................................... 51
10.11.1 Vent/air termination - wall ........................................................................................... 51
10.11.2 Determine Location..................................................................................................... 51
ROOF (VERTICAL)DIRECT VENTING............................................................................................. 56
10.12.1 Vent/air termination – vertical ..................................................................................... 56
10.12.2 Determine location...................................................................................................... 56
11 CASCADING....................................................................................................................................... 60
APPLIANCE ................................................................................................................................ 60
11.1.1 Calculation HWB (Valid for parts supplied by Duravent (M&G)). ............................... 60
11.1.2 Terminals equivalent feet............................................................................................ 60
EXISTING COMMON VENTING GUIDELINES................................................................................... 61
12 ELECTRICAL INSTALLATION .......................................................................................................... 62
GENERAL................................................................................................................................... 62
CONNECTION MAINS SUPPLY....................................................................................................... 62
ELECTRICAL CONNECTIONS........................................................................................................ 62
EXPLANATION OF THE LOW VOLTAGE CONNECTIONS..................................................................... 63
EXPLANATION OF THE HIGH VOLTAGE CONNECTIONS.................................................................... 64
LADDER/LOGIC DIAGRAM............................................................................................................ 65
ELECTRICAL SCHEMATICS........................................................................................................... 66
SENSOR AVAILABILITY................................................................................................................. 68
NTC SENSOR CURVE.................................................................................................................. 68
PROGRAMMABLE IN-AND OUTPUTS ............................................................................................. 69
13 WATER HEATER CONTROLLER AND DISPLAY............................................................................ 70
DISPLAY AND BUTTONS............................................................................................................... 70
13.1.1 Display icons............................................................................................................... 70
SCREENS AND SETTINGS. ........................................................................................................... 71
13.2.1 Set Actual setpoint/DHW setpoint directly via the Status overview............................ 71
13.2.2 Entering the menu....................................................................................................... 71
13.2.3 Protected menu items................................................................................................. 72
13.2.4 De-aeration Sequence................................................................................................ 72
13.2.5 Language settings....................................................................................................... 72
WATER HEATER HISTORY............................................................................................................ 73
ERROR LOGGING........................................................................................................................ 73
SERVICE REMINDER.................................................................................................................... 74
13.5.1 Service overdue logging ............................................................................................. 74
13.5.2 Reset the service reminder......................................................................................... 74
13.5.3 Menu’s and parameters .............................................................................................. 74
GENERAL................................................................................................................................... 75
13.6.1 Pump start exercise every 24 hours........................................................................... 75
13.6.2 Frost protection........................................................................................................... 75
13.6.3 Flue temperature protection........................................................................................ 76
13.6.4 Appliance selection..................................................................................................... 76
IGNITION CYCLE ......................................................................................................................... 76
13.7.1 Flame detection .......................................................................................................... 77
13.7.2 Flame recovery ........................................................................................................... 77

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DEMAND FOR DOMESTIC HOT WATER......................................................................................... 77
13.8.1 DHW Storage with bulb sensor; DHW mode 1........................................................... 77
13.8.2 DHW mode 4 .............................................................................................................. 78
13.8.3 Anti-legionella protection............................................................................................. 79
13.8.4 Display menu structure summary. .............................................................................. 80
14 TEMPERATURE PROTECTION ........................................................................................................ 87
15 ERROR INFORMATION..................................................................................................................... 87
WATER HEATER HISTORY............................................................................................................ 87
LOCKOUT CODES........................................................................................................................ 88
BLOCKING CODES ...................................................................................................................... 90
WARNINGS ................................................................................................................................ 92
16 CASCADING....................................................................................................................................... 93
SYSTEM SETUP.......................................................................................................................... 93
WATER HEATER CASCADE SETUP............................................................................................... 94
16.2.1 Setting the water heater address................................................................................ 94
16.2.2 E2prom address selection through e2prom setting.................................................... 94
16.2.3 Cascade – Heating only Managing water heater........................................................ 95
16.2.4 Cascade – Domestic Hot Water Settings ................................................................... 95
16.2.5 Cascade – Start/stop sequence.................................................................................. 96
16.2.6 Cascade – Power balance mode................................................................................ 96
CASCADE –WATER HEATER ROTATION ....................................................................................... 96
16.3.1 Next depending to start selection ............................................................................... 96
CASCADE ERROR HANDLING ...................................................................................................... 97
16.4.1 Cascade Frost protection............................................................................................ 97
16.4.1 Emergency mode........................................................................................................ 97
16.4.2 Loss of cascade communication................................................................................. 97
17 SYSTEM TEST.................................................................................................................................... 98
18 COMMISSIONING THE WATER HEATER........................................................................................ 99
FIRST:FLUSHING THE WATER HEATER WITH WATER...................................................................... 99
SECOND:FILLING &VENTING THE WATER HEATER AND THE SYSTEM.............................................. 99
THIRD:CHECK THE WATER FLOW................................................................................................. 99
MOUNTING CONDENSATE TRAP .................................................................................................. 99
CHECKING GAS PRESSURE........................................................................................................ 100
FIRING FOR THE FIRST TIME ...................................................................................................... 100
19 ADJUSTING AND SETTING THE WATER HEATER...................................................................... 101
INTRODUCTION......................................................................................................................... 101
19.1.1 Combustion table...................................................................................................... 101
19.1.2 Setting screws venturi- and gas valves: drawings.................................................... 102
ADJUSTMENT PROCEDURES...................................................................................................... 103
VENTURI REPLACEMENT ADJUSTMENT...................................................................................... 103
CONVERSION FROM NATURAL GAS TO PROPANE......................................................................... 104
START UP CHECKLIST .............................................................................................................. 106
20 INSPECTION, MAINTENANCE AND SERVICE.............................................................................. 108
GENERAL................................................................................................................................. 108
SAFETY INSTRUCTIONS CRYSTALLINE SILICA............................................................................. 108
INSPECTION,MAINTENANCE AND SERVICE.................................................................................. 109
20.3.1 Mounting the burner door.......................................................................................... 116
MAINTENANCE CHECKLIST........................................................................................................ 117
21 USER INSTRUCTIONS .................................................................................................................... 118
22 SPARE PARTS................................................................................................................................. 119

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IMPORTANT
READ ALL OF THE FOLLOWING WARNINGS AND STATEMENTS BEFORE READING
THE INSTALLATION INSTRUCTIONS
Danger Sign: indicates the presence of an imminently hazardous situation that will cause
death, serious personal injury or substantial property damage.
Warning Sign: indicates the presence of a hazardous situation which can cause death,
serious personal injury or substantial property damage.
Caution Sign plus Safety Alert Symbol:
indicates a hazardous situation which will or can
cause minor or moderate personal injury or property damage.
Caution Sign plus a lightning bolt: indicates the risk of electric shock and the potential of
hazards due to electric shock.
Notice Sign: indicates special instructions on installation, operation or maintenance that
are important but not related to personal injury or property damage.
This Water heater
must be installed by a licensed and trained Heating Technician or the
Warranty is void. Failure to properly install this unit may result in property damage, serious
injury to occupants, or possibly death.
DANGER
WARNING
CAUTION
CAUTION
NOTICE
WARNING

E93.1801EN171 HWB installation manual
7
1 SAFETY GUIDELINES

E93.1801EN171 HWB installation manual
8
CONSIGNES DE SÉCURITÉ.

E93.1801EN171 HWB installation manual
9
This water heater is equipped with a pressure switch in the event of a blocked vent the wa-
ter heater will lockout. No attempt by the user/owner should be made to put the water
heater back into operation. A qualified service technician should be notified of the issue.
The water heater should only be reset by a qualified service technician after they have di-
agnosed and corrected the issued that caused the safety lockout of the water heater.
“Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the
electrical supply to the pump. Instead, shut off the gas supply at a location external to the
appliance.”
Eco King Heating Products Inc. recommends the installation of a carbon monoxide detec-
tor in the water heater room for all installations.
WARNING: There are no user serviceable parts on this water heater. Warranty does not
cover defects caused by attempts to service this water heater by someone other than a
qualified gas service technician. These attempts could cause property damage, personal
injury or loss of life.
WARNING: Improper installation, adjustment, al-
teration, service or maintenance can cause
property damage, personal injury (exposure to
hazardous materials) * or loss of life. Installation
and service must be performed by a qualified in-
staller, service agency or the gas supplier (who
must read and follow the supplied instructions
before installing, servicing, or removing this wa-
ter heater. This water heater contains materials
that have been identified as carcinogenic, or
possibly carcinogenic, to humans)
AVERTISSEMENT: Une installation, un réglage, une
modification, une réparation ou un entretien non con-
forme aux normes peut entraîner des dommages maté-
riels, des blessures (exposition à des matières dange-
reuses) ou la mort. L'installation et l'entretien doivent
être effectués par un installateur ou un service d'entre-
tien qualifié ou le fournisseur de gaz (qui doivent avoir lu
les instructions fournies avant de faire l'installation, l'en-
tretien ou l'enlèvement de le chauffe-eau et les respec-
ter. Ce chauffe-eau contient des matériaux qui ont été
identifiés comme étant cancérogènes ou pouvant l'être).
Do not use this water heater if any part has been under water. Immediately call a qualified
service technician to inspect the water heater and to replace any part of the control system
and any gas control which has been under water
WARNING: Crystalline Silica - Certain components in the combustion chamber may con-
tain this potential carcinogen. Improper installation, adjustment, alteration, service or
maintenance can cause property damage, serious injury (exposure to hazardous materi-
als) or death. Refer to Section 19 for information on handling instructions and recom-
mended personal protective equipment. Installation and service must be performed by a
qualified installer, service agency or the gas supplier (who must read and follow the sup-
plied instructions before installing, servicing, or removing this water heater. This water
heater contains materials that have been identified as carcinogenic, or possibly carcino-
genic, to humans).
DANGER
NOTICE
WARNING
DANGER
WARNING
CAUTION
WARNING
Avertissement

E93.1801EN171 HWB installation manual
10
To meet commercial hot water requirements, the water heater setpoint is adjustable up to 190°F. However,
water temperatures over 125°F can cause severe burns instantly or death from scalds. This is the preferred
starting point for setting the control for supplying general purpose hot water.
Safety and energy conservation are factors to be considered when setting the water temperature on the water
heater. The most energy efficient operation will result when the temperature setting is the lowest that satisfies the
needs consistent with the application. The table below details the relationship of water temperature and time
with regard to scald injury and may be used as a guide in determining the safest water temperature for your
applications.
Table courtesy of Shriners Burn Institute.
Maximum water temperatures occur just after burner has
shut off. To find hot water temperature being delivered, turn
on a hot water faucet and place a thermometer in the
hot water stream and read the thermometer.
Time/Temperature Relationships in Scalds
The temperature of the water in the storage tank can be
regulated by setting the temperature at the water heater. To
comply with safety regulations, the setpoint was set at its
lowest setting before shipment from the factory.
WARNING: Water temperatures over 125 °F (52 °C) can cause severe burns instantly or
death from scalding. The water temperature is factory set at 140 °F (60 °C) to minimize
legionella risk. Before bathing or showering always check the water temperature.
There is a Hot Water SCALD Potential if the water heater setpoint is set too high.
Hotter water increases the risk of SCALDING!
When this heater is supplying general purpose hot water requirements for use by
individuals, a thermostatically controlled mixing valve for reducing point of use water
temperature is recommended to reduce the risk of scald injury.
Contact a licensed
plumber or the local plumbing authority for further information.
Water temperature over 125°F can
causeinstantsevereburnsordeath from
scalds.
Children, disabled, and elderly are at
highest risk of being scalded.
See instruction manual before setting
temperature at water heater.
Feel water before bathing or showering.
Use temperature limiting valves.
Temperature Time to Produce Serious Burn
120°F More than 5 minutes
125°F 1-1/2 to 2 minutes
130°F About 30 seconds
135°F
About 10 seconds
140°F Less than 5 seconds
145°F
Less than 3 seconds
150°F About 1-1/2 seconds
WARNING
DANGER
CAUTION
NOTICE

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2 INTRODUCTION
This manual is written for the installer and service tech-
nician.
Eco King Heating Products Inc. is not accountable for
any damage caused by failure to correctly follow these
instructions. For service and repair purposes use only
original Eco King Heating Products Inc. spare parts.
All documentation produced by the manufacturer is
subject to copyright law.
This manual is subject to change without notice.
Ce manuel est écrit pour l'installateur et le technicien
d'entretien.
Eco King Heating Products Inc. n'est pas responsable
de tout dommage causé par ne pas suivre correctement
de ces instructions. Pour service et réparation, utiliser
seulement pièces de rechange de Eco King Heating
Products Inc.
Tout documentation produit par le fabricant est sous ré-
serve de la loi sur le droit d'auteur. Ce manuel est sujet
à changement sans préavis.
Explanations.
CHB/CB = Condensing Boiler
HWB = Hot Water Boiler for Hot Water (drinking wa-
ter) usage only.
CH = Central Heating (for central heating pur
poses and/or indirect hot water)
BCU = burner control unit
PB = display board/ control panel (Pixel Button)
299/399/499 = Model number of the water heater.
Explications.
CHB = Chaudière à condensation.
HWB = Chauffe-eau pour eau chaude sanitaire usage
seulement.
CH = Chauffage central (pour objectif chauffage et/
ou eau chaude indirect)
BCU = commande (burner control unit)
PB = écran (Pixel Button)
299/399/499 = Modèle numéro de chaudière.
Maintenance and inspection
Visually inspect the venting system for proper size
and horizontal pitch and determine there is no block-
age or restriction, leakage, corrosion and other defi-
ciencies which could cause an unsafe condition.
Maintenance and inspection of the water heater
should be carried out at the following occasions:
•When a number of similar error codes and/or
lockouts appear.
•At least every 12 months maintenance must
be done to ensure safe and efficient opera-
tion.
Damage caused by lack of maintenance will not
be covered under warranty
Entretien et inspection
« Inspecter de façon visuelle le système d'évacuation
pour déterminer la grosseur et l'inclinaison horizon-
tale qui conviennent et s'assurer que le système est
exempt d'obstruction, d'étranglement, de fuite, de
corrosion et autres défaillances qui pourraient pré-
senter des risques. »
L'entretien et l'inspection du chauffe-eau doivent
être effectués aux occasions suivantes :
•Lorsqu'un certain nombre de codes d'erreur
et/ou de verrouillage semblables apparais-
sent.
•Au moins tous les 12 mois, l'entretien doit
être fait pour assurer un fonctionnement sûr
et efficace.
Les dommages causés par le manque d'entretien
ne seront pas couverts par la garantie

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For installations in the Commonwealth of Massachusetts.
The following local requirements apply in addition to all other applicable NFPA requirements:
For direct- vent water heaters, mechanical-vent heating appliances or domestic hot water equipment, where the
bottom of the vent terminal and the intake is installed below four feet above grade the following requirements must
comply:
1) If not present on each floor level where there are bedrooms, a carbon monoxide detector and alarm must
be placed in a living area outside the bedrooms. The carbon monoxide detector and alarm must comply
with NFPA 720 (2005 Edition).
2) A carbon monoxide detector and alarm shall be located in the room that houses the water heater
and/or equipment and shall:
a) Be powered by the same electrical circuit as the water heater and/or equipment such that only one
service switch services both the water heater and the carbon monoxide detector;
b) Have battery back-up power;
c) Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and
d) Have been approved and listed by a Nationally Recognized Testing Lab as recognized under 527
CMR.
3) A product-approved vent terminal must be used, and if applicable, a product approved air intake must be
used. Installation shall be performed in strict compliance with the manufacturer’s instructions. A copy of the
installation instructions shall remain with the water heater and/or equipment at the completion of the instal-
lation.
4) A metal or plastic identification plate shall be mounted at the exterior of the building, four feet directly above
the location of vent terminal. The plate shall be of sufficient size to be easily read from a distance of eight
feet away and read “Gas Vent Directly Below”.
For direct-vent water heaters mechanical-vent heating water heaters or domestic hot water equipment where the
bottom of the vent terminal and the intake is installed higher than four feet above grade the following requirements
must comply:
1) If not present on each floor level where there are bedrooms, a carbon monoxide detector and alarm must
be placed in a living area outside the bedrooms. The carbon monoxide detector and alarm must comply
with NFPA 720 (2005 Edition).
2) A carbon monoxide detector shall:
a) Be located in the room where the water heater and/or equipment is located;
b) Be either hard-wired or battery powered or both; and:
c) Shall comply with NFPA 720 (2005 Edition).
3) A product-approved vent terminal must be used, and if applicable, a product- approved air intake must be
used. Installation shall be in strict compliance with the manufacturer’s instructions. A copy of the installation
instructions shall remain with the water heater and/or equipment at the completion of the installation.

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Important technical warnings and guidelines
Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.
Maintenance and inspection of the water heater should be carried out at the following occasions:
•When a number of similar error codes and/or lockouts appear.
•At least every 12 months maintenance must be done to ensure safe and efficient operation.
Damage caused by lack of maintenance will not be covered under warranty
The Eco King Hot Water systems will, for a long period, comfortably meet your requirement of hot water of the
right temperature at the right hour, provided that a few important conditions have been fulfilled regarding the in-
stallation.
Please follow all instructions and recommendations presented in this manual by Eco king, especially the ones
concerning the next important topics:
- Water quality (also see §6.7 on page 29)
A first necessary condition is the quality of the water to be heated in the hot water heater.
Only potable water can be used with this water heater. Do not introduce pool or spa water, or any chemically
treated water into the water heater.
Three values matter: hardness, total amount of dissolved solids and acidity. If water quality does NOT meet
the requirements the system may be seriously damaged in time!
♦Hardness should not exceed 205 PPM CaCO3(11,5°dH)
Water hardness leads to scale formation and may affect/damage the water heater. Hard water scaling
must be avoided or controlled by proper water treatment.
♦TDS (Total Dissolved Solids) should not exceed 450 PPM
♦Hardness and TDS together may not exceed 450 PPM
♦pH value should be between 6,5 and 7,5, measured cold
The actual values can be retrieved at your local water supplier.
If water quality doesn’t meet the abovementioned requirements, a water treatment installation should be in-
stalled to improve water quality to the required levels, if possible.
- Water flow velocity and pump selection
For a given combination of water heaters and tanks, pump selection is very important with respect to the
required flow velocity.
- Water flow velocity and piping diameters and lengths
Following the instructions and recommendations given in the referred paragraphs will highly improve the function-
ing and considerably lengthen the life time of your HW system.
Furthermore, for all Eco King appliances the next instructions and recommendations apply:
!Never use aluminium or aluminium containing flue gas outlet
!Always fill the siphon before commissioning the water heater
!Always set the gas valves during commissioning the water heater, for the first time and after maintenance
and/or installation changes
!Never place a ball valve between the safety valve and the water heater
!In a log, keep track of all situations regarding the appliance:
what, when, by whom, what actions and/or changes, what communication has been performed
Eco King is not liable for any damage caused by inaccurately following these mounting instructions.
Only Eco King parts may be used when carrying out any repair or service works.
Do not use chlorine based products for brazing.
When commissioning the water heater, the running of the water heater pump must be checked before leav-
ing the installation.

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Firing the water heater without water flow (but filled with water) will cause a boiling noise.
The Outlet and Inlet temperature are checked continuously. The temperature difference may not exceed the
programmed value belonging to the actual power mode. If it does, the water heater will go in a lock-out.
The applied DHW pump must be controlled only by the HW water heater control. If, for any reason,
an external pump control is applied without written approval of Eco King, the complete warranty
on the HW water heater and all supplied parts will become invalid.
Minimum water pressure 15 psi.
Fuel used should have sulphur rates that comply with the next values: a maximum annual peak over a short
period of time of 150 mg/m3and an annual average of 30 mg/m3 maximum.
Combustion air must be free of contents of chlorine, ammonia, alkali agents. The air near a swimming pool,
a washing machine or a laundry is containing these a.m. contents.
If the water heater is used in combination with a hot water tank without any other heat exchanger; the water
heater should be equipped with a safety relief valve. In some cases also the tank should be equipped with
a T&P relief valve. Always apply all applicable installation standards and regulations.
At first installation, the built-in automatic air vent should be open.
LEGIONNAIRES’ DISEASE
An anti-Legionella function is present in the software and is default turned OFF when using mode
4 (Stand Alone) and is turned ON at DHW mode 1, Cascaded boilers. (its not possible to use the
Anti-Legionella funtion at DHW mode 4.)
Pressure relief valve
This unit does not come with an approved pressure relief valve.
An approved pressure relief valve must be installed to the outlet of the water heater.
•The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local
codes.
•The BTUH rating of the relief valve must not be less than the BTUH input of the heater
•The pressure relief valve must not exceed the maximum working pressure indicated on the water heater
rating plate.
•The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
outward and cause damage or personal injury.
•Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 inches (152
mm) from the floor. This discharge tube must allow free and complete drainage without any restrictions.
•If the pressure relief valve discharges periodically, this may be due to thermal expansion in a closed wa-
ter supply system. Contact the water supplier or a local plumbing professional on how to correct this
situation. Do not plug the pressure relief valve.
•The pressure relief valve must be manually operated periodically to check for correct operation.
•Before operating the valve manually, check that it will discharge in a place for secure disposal.
•No valve must be placed between the relief valve and the water heater. DO NOT apply a closing valve
or any other form of narrowing, because this might disturb the correct functioning of the safety valve.
Hot water could be released when the pressure relief valve is opened. This can result in
severe personal injury. Before operating the pressure relief valve manually, check that it
will discharge in a safe place. If water does not flow freely from the end of the discharge
pipe, turn the gas supply and power OFF and call a qualified person to determine the cause.
Refer to the pressure relief valve manufacturer's instructions for inspection and mainte-
nance requirements.
WARNING

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The water heater and tank should be installed by a skilled installer according to all applicable standards and reg-
ulations for tap water installations. Use the next scheme as guideline. When multiple water heaters and tanks
are applied, every combination has to be equipped with its own safety valve.
A) Potable water inlet
B) Hot water supply circulation
C) Circulation return
1) Pressure relief valve (manda-
tory in case service water
pressure is too high)
2)
Inlet combination with valve
(mandatory)
3) Apply filter if necessary (rec-
ommended)
4) A suitable safety valve must
be mounted near the water
heater (mandatory)
This safety valve may never be
isolated from the water heater
by means of a closing valve
5) Mount the tank sensor in an
immersion bulb into the tank
at 1/5 from the bottom of the
tank
6) Drain valve (recommended)
7) Hot and cold-water mixers
SAFETY COMPONENTS
The picture shows an example of a functional installation. The safety components as shown
in the picture are NOT necessarily conform all applicable standards and regulations.
ALWAYS have the system installedby a skilled installer. Safety must beadded
according to all applicable standards and regulations.
PUMP
NON- RETURN VALVE
VALVE
SAFETY VALVE
AUTOMATIC VENT
FILTER
INLET COMBINATION
- Overflow
- Controllable return valve
- Valve
PRESSURE REGULATING
VALVE
NOTICE

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16
3 TECHNICAL DATA WATER HEATERS
Functional introduction
The HWB water heaters are central heating water heaters with a maximum high efficiency. Such a performance
can be reached by, amongst other things, using a special heat exchanger made of stainless steel. This allows the
flue gases to cool down below the condensation point, and so release extra heat. This has an immediate positive
impact on the efficiency.
The water heater is set for Natural gas.
Fuel used should have Sulphur rates with a maximum annual peak over a short period of time of 150 mg/m3(110
ppm average) and an annual average of 30 mg/m3 . (22 ppm average)
Water heater control includes:
Cascade control for up to sixteen water heaters
Remote operation and heat demand indication from each water heater
Anti-Legionnaires’ disease function (Only available at DHW mode 1, cascaded Heaters)
Connections for:
Water heater pump
PWM control for external water heater pump.
System pump
External flow switch or external safety device.
Modbus
External system sensor
DHW sensor.
External Ignition coil
Location of version numbers
Burner Controller Hardware Version
– To be found on the second line of the white sticker on the side of the burner controller.
e.g. 957MN15_3Rh4a
Burner Controller Software Versions
– Press the menu button , go to Information and then to Software Versions.
Information
Software Versions
Water heater Status
Water heater History
Error Log
i
Software Versions
Display [63EF 83BC]
Water heater [5C79 14A9]
Device Group 900MN

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17
Technical specifications datasheet
GENERAL
Water heater, category
-
IV
Water heater model HWB-299 HWB-399 HWB-499
Dimensions (h x w x d) inch (mm) 33.3 x 17.3 x 20.9 (845 x 440 x 530)
Water content (estimated)
Gallon (liter)
1.32 (5.0) 2.19 (8.3) 2.74 (10.4)
Weight (empty)
Lbs. (kg)
169 (77) 183 (83) 187 (85)
Supply /return connection
(boiler)
inch
NPT 1 ½” NPT 1 ½” NPT 1 ½”
Gas connection
inch
NPT 1” NPT 1” NPT 1”
Flue and air connection
inch (mm)
4” (100) 4” (100) 6” (150)
WATER HEATING Values Low fire - High fire:
Input gross natural gas MMBTUS/hr 60 / 295 80 / 396 98 / 474
Input gross natural gas kW 17.6 / 86.5 23.4 / 116 28.7 / 139
Input gross propane MBTU/hr 60 /294 80 / 397 98 / 473
Input gross propane kW 17.6 / 86.1 23.4 / 116 28.7 / 139
Thermal efficiency natural gas
ANSI Z21.10.3-2015-CSA 4.3-2015
%
96.8 95.6 97.4
Thermal efficiency propane
ANSI Z21.10.3-2015-CSA 4.3-2015
% 95.5 95.8 95.4
Turndown ratio 1:x 5 5 5
Recovery rating @ 100 °F rise gal/h 319 428 513
GAS CONSUMPTION Values Low fire - High fire:
Natural gas
ft3/h
m
3
/h
54.8 - 274
1.6- 7.8
74.3 - 368
2.1 - 10.4
91.0 - 441
2.6 - 12.5
Propane 1
ft3/h
m
3
/h
23.6 - 118
0.7 - 3.3
32.0 - 159
0.9 - 4.5
39.2 - 190
1.1 - 5.4
Gas supply pressure
nominal 2
Nat. gas
inch WC (mbar)
7.0 (17.4)
Propane inch WC (mbar) 11.0 (27.4)
NOTES
1Using propane, maximum fan speed needs to be reduced
2Min. and max. gas supply pressures:
p nom inch W.C. (mbar)
p min inch W.C. (mbar)
p max inch W.C. (mbar)
Natural gas 7.0 (17.4) 3.5 (8.7) 10.5 (26.2)
Propane
11.0 (27.4)
8.0 (19.9)
13.0 (32.4)

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NOTICE
Water heater model
HWB-299
HWB-399
HWB-499
EMISSION Values Low fire - High fire:
CO2flue gas 3
Natural gas
%
9.8 - 9.2
Propane
%
11.0 - 10.4
O2flue gas 3
Natural gas
%
3.7 - 4.7
Propane
%
4.1 - 5.0
Flue gas temperature at combustion air
temperature = 70 °F (20 °C)
°F (°C) 120 - 180 (50 - 80)
Available pressure for the flue system 4inch WC
(Pa) 0.8 (200)
INSTALLATION
Resistance water heater
ΔT = 20 °F ft.head (m.WC) 34 (10) 31 (9.3) 27 (8.1)
ΔT = 27 °F ft.head (m.WC) 20 (5.9) 17 (5.2) 15 (4.7)
Pressure boiler min-max. psi (bar) 15.0 - 87.0 (1.0 - 6.0)
Max. supply temperature °F (°C) 160 (71)
ELECTRIC
Maximum power consumption
W
180
200
280
Power supply V/Hz 120/60
Protection class - IPX4D
NOTES
3CO2/ O2of the unit measured/set without the boiler front panel in place
4Maximum allowed combined resistance of flue gas and air supply piping at high fire
High altitude operation.
High Altitude Operation
The water heater is designed to operate at its maximum listed capacity in installations at elevations less than or equal to
2000 ft (610 m) above Sea Level. Since the density of air decreases as elevation increases, maximum specified capacity
will be de-rated for elevations above 2000 ft (610 m) in accordance with the table underneath.
Elevations
2000 ft (610 m)
3000 ft (914 m)
4000 ft (1219 m)
4500 ft (1372 m)
Above 4500 ft (1372 m)
In USA
No de-rate
De-rate by 4 %
De-rate by 8 %
De-rate by 10 %
De-rate 4% per 1000 ft.
In Canada
No de-rate
De-rate by 10%
De-rate by 10 %
De-rate by 10 %
De-rate 4% per 1000 ft.
In USA and Canada, de-rate by 4% extra for every 1000 ft. above 4500 ft.
How to calculate De-rating at intermediate elevations for US:
Elevation between:
2000 and 3000 ft : (New value – 2000) x 0.004 Example: Elevation is 2600 ft. De-rating is (2600-2000)x0.004 = 2.4 %
3000 till 4000 ft : ((New value – 3000) x 0.004)+4 Example: Elevation is 3700 ft. De-rating is ((3700-3000)x0.004)+4 = 6.8 %
4000 till 4500 ft : ((New value – 4000) x 0.004)+8 Example: Elevation is 4200 ft. De-rating is ((4200-4000)x0.004)+8 = 8.8 %
Above 4500 ft : ((New value – 4500) x 0.004)+10 Example: Elevation is 4800 ft. De-rating is ((4800-4500)x0.004)+10 = 11.2 %
How to calculate De-rating at intermediate elevations for Canada:
Elevation between:
2000 till 4500 ft : All values derate by 10% Example: Elevation is 3600 ft. De-rating = 10 %
Above 4500 ft : ((New value – 4500) x 0.004)+10 Example: Elevation is 7600 ft. De-rating is ((7600-4500)x0.004)+10 = 22.4 %
Combustion – At elevations above 2000 ft (610 m), the combustion of the appliance must be checked with
a calibrated (altitude corrected) combustion analyzer to ensure safe and reliable operation. No orifices or
high-altitude
kits are needed, since the 1:1 Gas/Air ratio of the gas valve and the venturi will respond
automatically to reduced air pressure.
It is the Installers responsibility to check the combustion of the appliance. Failure to follow these
instructions may result in property damage, serious injury, or death.

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4 WATER HEATER DIMENSIONS
HWB-299
Connections
HWB-299
A Hot water outlet NPT 1½”
B
Cold water inlet NPT 1½”
C Condensate Flexible hose Ø 1.06 ” (26.9 mm)
D Gas NPT 1”

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20
HWB-399
Connections
HWB-399
A Hot water outlet NPT 1½”
B Cold water inlet NPT 1½”
C Condensate Flexible hose Ø 1.06” (26.9 mm)
D Gas NPT 1”