Dux 21ECB6N, 21ECB6L, 26ECB6N, 21ENB5N, 21ENB5L Installation Manual

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Page 1

Installation Manual

Condensing Models

26ECB5N 26ECB5L 26ECB6N 26ECB6L 21ECB5N 21ECB5L 21ECB6N 21ECB6L

Non Condensing Models

21ENB5N 26ENA5N 21ENB5L 26ENA5L 21ENB6N 26ENA6N 21ENB6L 26ENA6L 17ENB5N 17ENB5L 17ENB6N 17ENB6L

Ex. 26ECB5N

To be installed and serviced only by an authorised person.

This appliance is not suitable for use as a pool heater.

The "authorised installing person" is responsible for:

1. Correct commissioning of this appliance

2. Ensure unit performs to the speci cation stated on the data label

3. Demonstrate operation of unit to customer before leaving

4. Hand these instructions to customer

This appliance must be installed in accordance with the manufacturer's installation instructions all Local Building, Water and Gas  tting regulations (AS/NZS3500.4, AS/NZS 5601, AS/NZS3000).

Failure to install this appliance in accordance with these installation instructions may void warranty.

In the interest of continued product improvement, Dux Manufacturing reserves the right to alter these speci cations without notice.

SBB80PT Rev. 06/16

AU Service Department : 1300 365 115 NZ Service Department : 0800 729 389

*SBB80PT*

Page 2

Contents

1. Included Accessories ............................................................................. 4

2. Optional Accessories .............................................................................. 4

3. Dimensions ............................................................................................. 5

4. Component Details Example ................................................................ 9

5. Before Installation .................................................................................. 11

6. Speciﬁ cations ......................................................................................... 12

7. Choosing Installation Site ..................................................................... 14

Installation Manual

8. Installation Clearances .......................................................................... 15

9. Installation .............................................................................................. 17

10. Gas Piping ............................................................................................... 18

11. Water Piping ........................................................................................... 19

12. Condensate Piping ................................................................................. 21

13. Electrical Wiring ..................................................................................... 22

14. Remote controller .................................................................................. 23

15. Maintenance ........................................................................................... 26

16. Trial Operation ........................................................................................ 26

WATER QUALITY .......................................................................................... 28

Page 3

Installation Manual

Condensing Models Non Condensing Models

26ECB5N 26ECB5L 26ECB6N 26ECB6L

Potential dangers from accidents during installation and use are divided into the following three categories. Closely observe these warnings, they are critical to your safety.

DANGER

WARNING

CAUTION

WARNING:

causing property damage, personal injury or death.

If the information in this manual is not followed exactly, a ﬁ re or explosion may result

21ECB5N 21ECB5L 21ECB6N 21ECB6L

21ENB5N 21ENB5L 21ENB6N 21ENB6L

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

17ENB5N 17ENB5L 17ENB6N 17ENB6L

26ENA5N 26ENA5L 26ENA6N 26ENA6L

Prohibited

Disconnect Power

Earth

Be sure to do

CAUTION

Requests to Installers

• In order to use the water heater safely, read this installation manual carefully, and follow the installation instructions.

• Failures and damage caused by erroneous work or work not as instructed in this manual are not covered by the warranty.

• Check that the installation was done properly in accordance with this Installation Manual upon completion.

•

After completing installation, please either place this Installation Manual in a plastic pouch and attach it to the side of the water heater,

or hand it to the customer to retain for future reference.

CAUTION

• The water heater must be commissioned including checking gas supply pressures at maximum demand.

•

The operation of the water heater should be explained including normal operation & regular maintenance.

Page 4

Included Accessories

The following accessories are included with the unit. Check for any missing items before starting installation.

Installation Manual

Part Shape

Q’ty

Owner's Guide,

Anchoring Screw

Installation Manual

(this document)

Optional Accessories

The accessories listed below are not included with the units, but may be necessary for installation.

Q’ty

Main Controller

(ECM1D)

MAIN

ECM1D

Bathroom Controller

(ECB1D)

ShapePart

Q’ty

each

ShapePartPart Shape

Q’ty

BATHROOM

ECB1D

Bathroom 2 Controller

(ECB2D)

Flue Diverter (L18)

for 26ENA series

Flue Diverter (L39)

for 17ENB series

Pipe cover

(H33-K-600)

• Maximum two Bathroom 2 controllers can be used. See P.23 for details.

ON/OFF

BATHROOM2

ECB2D

Flue Diverter (S37)

for 21/26ECB series

Flue Diverter (L38)

for 21ENB series

Recess Box (RBM2)

for 21/26ECB series,

17/21ENB series

Recess Box (RMM3)

for 26ENA series

Page 5

Installation Manual

Dimensions

26ECB series

DRAIN OUTLET(R1/2)

HOT WATER OUTLET(R3/4)

COLD WATER INLET(R3/4)

4-φ13

2-6×13 OBLONG HOLE

(VIEW FROM TOP)

296

252

102

120

GAS INLET(R3/4)

WIRING THROUGHWAYS

170

338

350

334

217 28

2-6.5×16.5 OBLONG HOLE

4-φ13

120

486

54210

487

10 AIR INLET

NEUTRALIZER TANK DRAIN

HOT WATER OUTLET

HEIGHT OF EACH FITTING FROM BOTTOM OF CASE

DRAIN OUTLET

520

AIR INLET

FLUE EXHAUST

AIR INLET

COLD WATER INLET

WIRING THROUGHWAYS

GAS INLET

DRAIN OUTLET

HOT WATER OUTLET 45

COLD WATER INLET 58

GAS INLET 50

Page 6

26ENA series

Installation Manual

(VIEW FROM TOP)

268

178

109

338

HOT WATER OUTLET(R3/4)

COLD WATER INLET(R3/4)

4-φ13

2-6×13 OBLONG HOLE

120

GAS INLET(R3/4)

WIRING THROUGHWAYS

350

334

10 11

567

62210

170

600

566

253

42 25

FLUE EXHAUST

AIR INLET

120

3-6.5×16.5 OBLONG HOLE

4-φ13

HEIGHT OF EACH FITTING FROM BOTTOM OF CASE

HOT WATER OUTLET 44

COLD WATER INLET 48

GAS INLET 49

10 133

COLD WATER INLET

GAS INLET

HOT WATER OUTLET

WIRING THROUGHWAYS

Page 7

Installation Manual

17/21ENB series

HOT WATER OUTLET(R3/4)

COLD WATER INLET(R3/4)

4-φ13

2-6ᨴ13 OBLONG HOLE

᧤VIEW FROM TOP᧥

296

252

139

120

10542

GAS INLET(R3/4)

338

21ENB Series

350

WIRING THROUGHWAYS

334

214 37

42 57

FLUE EXHAUST

17ENB Series

170

350 334

178

120

3-6.5ᨴ16.5 OBLONG HOLE

4-φ13

487

HEIGHT OF EACH FITTING FROM BOTTOM OF CASE

HOT WATER OUTLET

COLD WATER INLET

GAS INLET

520

AIR INLET

486

AIR INLET

HOT WATER OUTLET

42 57

FLUE EXHAUST

AIR INLET

COLD WATER INLET

WIRING THROUGHWAYS

GAS INLET

Page 8

Component Details Example

26ECB series model shown for illustration only

Installation Manual

Secondary heat exchanger

Flue exhaust

High limit switch

Water level electrode

Neutralizer

Anti-frost heater

Igniter

Freeze protection thermostat

Main flow control valve

Water outlet thermistor

Anti-frost heater

Neutralizer tank drain

Primary heat exchanger

Anti-frost heater

Thermal fuse

Flame rod

Ignition plug

Burner manifold & gas valve

Circuit board

Water inlet thermistor

Water flow sensor

Fan motor

Hot water outlet

Pressuer relief valve

Drain outlet

Cold water inlet

Gas inlet

Power code

Inlet water filter

Ex. 26ECB5N

Page 9

Installation Manual

26ENA series model shown for illustration only

Heat exchanger

Flame rod

Flue exhaust

Anti-frost heater

High limit switch

Thermal fuse

Ignition plug

Burner manifold

Igniter

Freeze protection thermostat

Main flow control valve

Earth leakage breaker

Anti-front heater

Hot water outlet

Inlet water filter

Cold water inlet

Remote Control Connections

Gas solenoid valve set

Circuit board

Fan motor

Gas inlet

Water inlet thermistor

Water flow sensor

Power code

Ex. 26ENA5N

Page 10

21ENB series model shown for illustration only

Installation Manual

Flue exhaust

High limit switch

Igniter

Freeze protection thermostat

Anti-frost heater

Main flow control valve

Water outlet thermistor

Anti-frost heater

Pressure relief valve

Heat exchanger

Anti-frost heater

Thermal fuse

Flame rod

Ignition plug

Burner manifold & gas valve

Circuit board

Water inlet thermistor

Water flow sensor

Fan motor

Hot water outlet

Inlet water filter

Gas inlet

Power code

Cold water inlet

Ex. 21ENB5N

Page 11

Installation Manual

Before Installation

WARNING

Check the Gas

• Check that the data label (left side of casing).

• Check that the gas supply line is sized for 26ECB5(6)N, 26ECB5(6)L: 175 MJ/hr, 185 MJ/hr 21ECB5(6)N, 21ECB5(6)L: 145 MJ/hr, 149MJ/hr 26ENA5(6)N, 26ENA5(6)L: 199 MJ/hr, 199 MJ/hr 21ENB5(6)N, 21ENB5(6)L: 159 MJ/hr, 158 MJ/hr 17ENB5(6)N, 17ENB5(6)L: 125.5 MJ/hr, 130 MJ/hr

• DO NOT OPERATE WITH ANY OTHER GAS TYPE.

Check the Power

• The power supply required is 230 - 240VAC, at 50Hz. Using the incorrect voltage may result in ﬁ re or

electric shock.

For NG Gas

xxxxxxxx

xx xx

Warning labels

• Located on the front and left hand side of the casing -PLEASE READ THESE LABELS CAREFULLY!

CAUTION

Do Not Use Equipment for Purposes Other Than Those Speciﬁ ed

• Do not use for other than increasing the temperature of the water supply, as unexpected accidents

may occur as a result.

Check Water Supply Quality

• If the water supply is hard, acidic or otherwise impure, treat the water with approved methods in

order to ensure full warranty coverage. See water quality statement on page 28.

Frost Protection

• When installed, power to the unit must be kept switched on, otherwise the appliance should be

drained. This prevents water freezing, and causing damage to the water heater.

Page 12

Installation Manual

Speci cations

Model Name 26ECB5N 26ECB5L 26ECB6N 26ECB6L 21ECB5N 21ECB5L 21ECB6N 21ECB6L

Approval certification number SAI-400194

Type

Operating Pressure 200 -1,000 kPa

Minimum Flow Rate 2.5 L/min.

Dimensions 520mm (Height) x 350mm (Width) x 170mm (Depth)

Weight 18 kg 17 kg

Water Holding Capacity 0.9 L 0.8 L

Connection Sizes

Power Supply

Accessories Anchoring Screws

Gas

Consumption

Maximum Hot Water

Installation Outdoor, Wall Mounted

Air Supply/Exhaust

Water Inlet R 3/4 (20mm)

Hot Water Outlet R 3/4 (20mm)

Gas Inlet R 3/4 (20mm)

Supply 230 - 240 VAC (50Hz)

Consumption

NG 175 MJ/hr 145 MJ/hr

LP 185 MJ/hr 149 MJ/hr

25°C Rise 26 L/min 21 L/min

NG/LP: 49.0W/60.0W Freeze Prevention 130W NG/LP: 43.0W/52.0W Freeze Prevention 130W

Power Flue

Model Name 21ENB5N 21ENB5L 21ENB6N 21ENB6L 17ENB5N 17ENB5L 17ENB6N 17ENB6L

Approval certification number SAI-400195

Type

Operating Pressure 200 -1,000 kPa

Minimum Flow Rate 2.5 L/min.

Dimensions 520mm (Height) x 350mm (Width) x 170mm (Depth)

Weight 15 kg 14 kg

Water Holding Capacity 0.5 L 0.5L

Connection Sizes

Power Supply

Accessories Anchoring Screws

Gas

Consumption

Maximum Hot Water

Installation Outdoor, Wall Mounted

Air Supply/Exhaust

Water Inlet R 3/4 (20mm)

Hot Water Outlet R 3/4 (20mm)

Gas Inlet R 3/4 (20mm)

Supply 230 - 240 VAC (50Hz)

Consumption

NG 159 MJ/hr 125.5 MJ/hr

LP 158 MJ/hr 130 MJ/hr

25°C Rise 21 L/min 17 L/min

NG/LP: 36.0W/49.0W Freeze Prevention 129W NG/LP: 31.0W/41.0W Freeze Prevention 129W

Power Flue

Page 13

Installation Manual

Model Name 26ENA5N 26ENA5L 26ENA6N 26ENA6L

Approval certification number SAI-400195

Type

Operating Pressure 200 -1,000 kPa

Minimum Flow Rate 2.5 L/min.

Dimensions 600mm (Height) x 350mm (Width) x 170mm (Depth)

Weight 19 kg

Water Holding Capacity 0.9 L

Connection Sizes

Power Supply

Accessories Anchoring Screws

Gas

Consumption

Maximum Hot Water

Installation Outdoor, Wall Mounted

Air Supply/Exhaust

Water Inlet R 3/4 (20mm)

Hot Water Outlet R 3/4 (20mm)

Gas Inlet R 3/4 (20mm)

Supply 230 - 240 VAC (50Hz)

Consumption NG/LP: 51.3W/51.3W Freeze Prevention 129W

25°C Rise 26 L/min

Power Flue

199 MJ/hr

• Speciﬁ cations may be changed without prior notice.

• The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature.

Page 14

Installation Manual

Choosing an Installation Site

* Locate the appliance in an area where water leakage from the unit or connections will not result in

damage to the area adjacent to the appliance or to the lower ﬂ oors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air ﬂ ow.

DANGER

• This water heater is for outdoor installation only. Never install it indoors.

Do not enclose the termination with corrugated

metal or other materials.

This will cause carbon monoxide poisoning and a potential ﬁ re hazard.

Indoor

WARNING

• Avoid places where ﬁ res are common, such as those where petrol, benzene and adhesives are handled, or places in which corrosive gases (ammonia, chlorine, sulfur, ethylene compounds, acids) are present. May result in ﬁ re.

• Avoid installation in places where dust or debris will accumulate. Dust may block the air-supply opening, causing the performance of the device fan to drop and incomplete combustion to occur as a result.

• Avoid installation in places where special chemical agents (e.g., hair spray or spray detergent) are used. Ignition failures and malfunction may occur as a result.

Prohibited

• Carbon Monoxide Poisoning Hazard. Do not install this water heater in a mobile home, recreation vehicle or on a boat.

Page 15

Installation Manual

CAUTION

• Install the water heater in a location where it is free from obstacles and stagnant air.

• Consult with the customer concerning the location of installation.

• Do not install the water heater near staircases or emergency exits.

• Do not install the water heater where the exhaust will blow on outer walls or material not resistant to heat. Also consider the surrounding trees and animals.

The heat and moisture from the water heater may cause discoloration of walls and resinous materials, or corrosion of aluminium materials.

• Do not locate the vent termination directed towards a window or any other structure which has glass or wired glass facing the termination.

• Install in a location where the exhaust gas ﬂ ow will not be affected by fans or range hoods.

• Take care that noise and exhaust gas will not affect neighbours.

• Avoid installation where the unit will be exposed to excessive winds.

• Before installing, make sure that the vent termination will have the proper clearances according to AS/NZS5601, or your local authority.

• On combustible surfaces e.g. weatherboards etc. it is not required to install a ﬁ re proof back board.

Installation Clearances

Prohibited

Before installing, check for the following:

The location of the ﬂ ue terminal must comply with the clearances shown on this page. If you are unsure about clearances not indicated here, in general refer to AS/NZS5601, or your local authority. In Western Australia refer to the WA Ofﬁ ce of Energy rules and regulations.

Flue outlet must be free from any combustible material.

WARNING

Page 16

Installation Manual

CLEARANCES FOR FLUE TERMINAL (front of heater)

The location of the ﬂue terminal must comply with the clearances shown on this page. If you are unsure about clearances not indicated here, in general refer to AS/NZS5601, or your local authority. In Western Australia refer to the WA Ofﬁce of Energy rules and regulations.

Key to illustration

Balanced ﬂue terminal position

Terminal position

Minimum

Spacing

Directly below an opening window, air vent or other ventilation opening*

1,500mm

B Below guttering 300mm

C Below eaves 300mm

Below balconies or a car port roof 300mm

E From vertical drain pipes or soil pipes 75mm

F From internal or external corners 300mm

G Above adjacent ground, roof or balcony level 300mm

H From a surface facing the terminal 500mm

J From a terminal facing the terminal 500mm

K From any other ﬂue terminal or combustion air intake 300mm

L From a mechanical air inlet including spa blower 1000mm

M Adjacent to opening 300mm

N Above intersection with roof 500mm

O For a vertical structure on the roof 500mm

*21ECB and 17ENB models to have

1000mm minimum spacing.

Page 17

Installation Manual

Installation

Securing to the wall

• Installation must conform with all local building, water or Gas Regulations or AS/NZS5601.

• The weight of the device will be applied to the wall. If the strength of the wall is not sufﬁ cient,

reinforcement must be done to prevent the transfer of vibration.

• Do not drop or apply unnecessary force to the device when installing. Internal parts may be

Be sure to do

damaged and may become highly dangerous.

• Install the unit on a vertical wall and ensure that it is level.

• Insure no additional pressure is applied to the pipework.

Item

Locating Screw Holes

Mounting

CAUTION

• When installing with bare hands, take caution to not

inﬂ ict injury.

• Be careful not to hit electrical wiring, gas, or water piping while drilling holes.

1. Drill a single screw hole, making sure to hit a stud.

2. Insert and tighten the screw and hang the unit by the upper wall mounting bracket.

3. Determine the positions for the remaining four screws (two for the top bracket and two for the bottom), and remove the unit.

4. Drill holes for the remaining four screws.

5. Hang the unit again by the ﬁ rst screw, and then

insert and tighten the remaining four screws.

6. Take waterprooﬁ ng measures so that water does

not enter the building from screws mounting the device.

IllustrationCheck

Location of Screw Hole

Mounting Bracket (upper)

Locating Screw Holes

Anchoring Screw

• Make sure the unit is installed securely so that it will not fall or move due to vibrations or earthquakes.

Structure

Page 18

Installation Manual

Gas Piping

Follow the instructions from the gas supplier.

The appliance must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 3.5 kPa.

The appliance and its gas connections must be leak tested before placing the appliance in operation.

The inlet gas pressure must be within the range speciﬁ ed. This is for the purposes of input adjustment.

In order to choose the proper size for the gas line, consult local codes and / or the AS/NZS5601.

Gas Pressure

Size the gas line according to total MJ/h demand of the building and length from the meter or regulator so that the following supply pressures are available even at maximum demand refer AS/NZS5601:

Working Gas Supply Pressures

Natural Gas Supply Pressure

Min. 1.13 kPa Max. 3.00 kPa

LP Gas Supply Pressure

Min. 2.75 kPa Max. 3.50 kPa

• Please ensure measurement is taken when the appliance is operating at maximum load.

Gas Meter

Select a gas meter capable of supplying the entire MJ/h demand of all gas appliances in the building.

Gas Connection

1) Fit a union to the water heater gas inlet for easy connection and removal. The thread diameter is 20 mm.

THIS DOES NOT INDICATE THE SIZE OF THE GAS

SUPPLY.

2) Fit an suitably approved isolating gas cock in the supply line adjacent to the water heater gas connection.

3) Ensure that the supply pipe and the gas pressure regulator (LPG or Natural Gas) has sufﬁ cient ﬂ ow capacity for this and other appliances connected to the ﬁ tting line.

4) For LPG appliances ensure that gas cylinders are of sufﬁ cient size. The water heater alone will require 2 x 45 Kg capacity cylinders.

5) Before connecting the appliance to the gas service, purge any debris or air from the gas service.

6) Check all joints for leaks with an approved leak tester after connection.

Measuring Gas Pressure

In order to check the gas supply pressure to the unit, a tap is provided on the gas inlet. Remove the hex head philips screw from the tap, and connect a manometer using a silicon tube.

In order to check the gas manifold pressure on the gas valve inside the unit. The pressure can be checked by removing the hex head philips screw and connecting a manometer with a silicon tube.

Refer to AS/NZS5601 for pipe sizing and details.

Ensure that the gas pipe size is correct. If undersized the appliance will not operate correctly

SERVICE CALLS ARE CHARGEABLE FOR UNITS WITH INCORRECT PIPE SIZES OR BLOCKED GAS OR WATER FILTERS.

Page 19

Installation Manual

Water Piping

Installation and service must be performed by a qualiﬁ ed plumber. Observe all applicable codes. This appliance is suitable for potable water applications. Do not use this appliance if any part has been underwater.

Immediately call a qualiﬁ ed service technician to inspect the appliance and replace any part of the control system and gas control which has been under water.

Piping and components connected to the water heater shall be suitable for use with potable water. Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water. A water heater used to supply potable water may not be connected to any heating system or components previously used with a nonpotable water heating appliance. When water is required in one part of the system at a higher temperature than in the rest of the system, means such as a mixing valve shall be installed to temper the water to reduce the scald hazard.

• Flush water through the pipe to clean out metal powder, sand and dirt before connecting it.

• Perform the following insulation measures for prevention of freezing.

• Take appropriate heat insulation measures (e.g., wrapping with heat insulation materials, using electric heaters) according to the climate of the region to prevent the pipe from freezing.

• Make sure that there are no water leaks from the cold and hot water supply pipes, then insulate the pipes completely.

• Be sure to also completely insulate the water supply valve and the cold and hot water connections on the water heater (refer to the ﬁ gure on the right).

• Do not cover the water drain plug with insulation so that water in the pipe can be drained. (Refer to the ﬁ gure in the right.)

•

Use a union coupling for connecting the pipes to reduce the force applied to the piping.

• When feed water pressure is too high, insert a depressurizing valve, or take water hammer prevention measure.

• Avoid using joints as much as possible to keep the piping simple.

• Avoid piping in which an air lock can occur.

•

Use approved piping materials.

• If installing the unit on a roof (Above lower-level hot water supply): If the unit is installed on a roof to supply water to the levels below, make sure that the water pressure supplied

to the unit does not drop below 199 kPa. It may be necessary to install a pump system to ensure that the water

pressure is maintained at this level. Check the pressure before putting the unit into operation. Failure to supply the proper pressure to the unit may result in noisy operation, shorter lifetime of the unit, and may

cause the unit to shut down frequently.

Completely insulate the water inlet and outlet fittings.

Do not cover the water drain plug with insulation so that water in the pipe can be drained.

Insulate the water supply valve completely.

Supply water piping

• Do not use PVC, iron, or any piping which has been treated with chromates, boiler seal or other chemicals.

• Pipe sizing from the cold water supply should be sized according to local BY LAWS for water supply.

• If sludge or foreign matter is present in the water supply it is recommended that a separate ﬁ lter/strainer be ﬁ tted to the cold water supply line.

• A GATE VALVE OR BALL VALVE must be used on the cold water inlet to the water heater. THIS REQUIREMENT IS AN AUSTRALIA WIDE REQUIREMENT UNDER THE NATIONAL PLUMBING CODE.

STOP TAPS OR COMBINATION STOP TAPS AND NON-RETURN VALVES ARE NOT TO BE USED.

• In order for the client to use the water heater comfortably, 200 to 1000 kPa of pressure is needed from the water supply.

Be sure to check the water pressure. If the water pressure is low, the water heater cannot perform to its full

capability, and may become a source of trouble for the client.

Please ensure this appliance does not receive inlet water greater than 85°C when used as a Solar booster.

Page 20

Installation Manual

Drain processing

• Expansion water may drop from the pressure relief valve and wet the ﬂ oor.

Hot water piping

• Do not use lead, PVC, iron or any piping which has been treated with chromates, boiler seal or other chemicals.

• Keep the pipe lengths to a minimum, and make sure that the pipework is well insulated as correct performance of the appliance is dependent on properly insulated pipework.

• DO NOT FIT ANY VALVES OR RESTRICTORS TO THE OUTLET OF THE WATER HEATER.

• DO NOT FIT ANY OBSTRUCTION TO THE PRESSURE RELIEF LOCATED ON THE HOT WATER OUTLET CONNECTION.

• Use mixing valves with low water resistance. Use shower heads with low pressure loss.

• If necessary, use a pump or other means to ensure that the supply water pressure to the inlet of the heater does not fall below 199kPa when the maximum amount of water is being demanded. If the water pressure drops below 200 kPa, local boiling can occur inside the water heater causing abnormal sounds and decreasing the durability of the heat exchanger.

After purging the air from the system using the hot water supply taps, remove the water inlet strainer located on the cold water supply inlet connection. Remove any debris from the ﬁ lter and replace. When replacing the ﬁ lter, do not over-tighten the “O” ring seal.

For units which are not 50˚C compliant, it is recommended that for sanitary ﬁxtures use primarily for the purpose of personal hygiene, that a temperature control device be ﬁtted (such as a tempering valve) as per AS3498.

No pressure reduction is required unless the water pressure exceeds 1000kPa.

50˚C Compliant Models Only

In order to comply with AS3498 the minimum distances as per the diagram below must be observed.

Commission Check for 50˚C Temperature Delivery

A temperature check must be completed at the nearest outlet to the water heater to ensure delivered water is below 50˚C.

To check the water temperature is below 50˚C.

1. At the closest outlet adjust the hot water ﬂow to at least 5 litres/min.

2. After hot water has been running for 1 min conﬁrm the water temperature is below 50˚C.

3. Turn the water off

Cold

Closest hot

15mm (min) 2m (min)

water outlet

Page 21

Installation Manual

Condensate Piping

ONLY APPLICABLE TO CONDENSING MODELS. PLEASE FOLLOW LOCAL CODES ABOUT PIPING.

• This water heater is a high efﬁ ciency, fully condensing appliance which produces condensate during

operation. Therefore, it is necessary to install condensate piping. The water heater incorporates a collection, neutralization, and removal system which must be properly drained in order to ensure proper operation of this appliance.

• The water heater is supplied with a pre-installed condensate neutralization system. No additional neutralizer is required unless local code dictates otherwise.

• In order to drain the condensate, a 15mm (1/2" BSP) male thread ﬁ tting is provided at the base of the water heater.

DO NOT FIT ANY VALVES OR REDUCE THE SIZE OF THIS FITTING OR THE CONDENSATE PIPING TO LESS THAN 15mm (1/2" BSP).

• Use plastic pipe, such as PVC, for the drain line. Do not use steel, black iron, or any other material which can corrode when placed into contact with water.

• Keep the length of the drain pipe as short as possible.

• Horizontal runs must be sloped 1/50 downwards the drain.

• The end of the drain pipe must not be submerged in water or blocked in any way.

• Be sure to check that condensate is freely flowing from the drain piping after the system has been installed. Condensate will begin ﬂ owing out of the water heater within 15 minutes after operation has started.

• Take measures to prevent the condensate drain lines from freezing (insulation, heat tape, electric heaters, etc.).

Condensate piping to floor drain

Condensing models only

DO NOT FIT ANY VALVES

Slope pipe downwards 1/50.

Floor drain

1/2" PVC pipe

The end of the drain pipe must have an air gap.

KEEP CLEARANCE

Page 22

Installation Manual

Electrical Wiring

WARNING

Electrical Shock Hazard Do not turn power on until controllers have been connected. Disconnect power before servicing. Failure to do so may result in death or serious injury from electrical shock.

• The appliance is equipped with a 1.5m cable with a three pinned earthed plug to be connected to 230

240VAC at 50 Hz.

-

The power consumption may be up to 21/26ECB series 177W, 17/21ENB series 181W, 26ENA series 000W.

Use an appropriate circuit.

• The appliance requires a 240V in Australia and 230V in New Zealand, 50Hz weatherproof plug installed in a protected position adjacent to the appliance.

• If the power cord is damaged and requires replacement, use only an original spare part available from the manufacturer.

• Do not disconnect the power supply when not in use. When the power is off, the freeze prevention in the water heater will not activate, resulting in possible freezing damage.

• Do not let the power cord contact the gas piping.

Tie the excess power cord outside the water heater. Putting the redundant length of cord inside the water heater may cause electrical interference and faulty operation.

Earth

• To prevent electrical shock, always plug power lead into an earthed point.

CAUTION

Electrostatic discharge can affect electronic components. Take precautions to prevent electrostatic discharges from personnel or hand tools during the water heater installation and servicing to protect product’s electronic control.

Page 23

Installation Manual

Remote Controller

Applicable Model

Remote controller

Main controller Bathroom controller Bathroom 2 controller

ECM1D

ECB1D ECB2D

* Maximum temperature is controlled by the maximum default temperature set in the water heater.

The following combination of remote controls will operate the water heater. Only Main Controller Works

Only Bathroom Controller Won't work Only Bathroom 2 Controller Won't work Main & Bathroom Controller Works Main, Bathroom & 1 or 2 Bathroom 2 Controllers Works Main & Bathroom 2 Controller Won't work Bathroom & Bathroom 2 Controller Won't work

Max temperature 60°C * (75°C : 26ENA6N/L only) Max temperature 50°C * Max temperature 50°C *

The bathroom controllers have a maximum temperature setting of 50°C for safety. To ensure compliance with Australian Standard AS/NZS3500.4, for sanitary areas, install either a 50°C model or a 55/60/75°C (75°C is 26ENA6N/L only) model with a tempering valve. In New Zealand, please refer to the New Zealand Building Code and all other applicable electrical, gas ﬁ tting and plumbing codes.

The maximum temperature allowed can be changed on both the 50

only)

models with the insertion of a bridge. With the bridge inserted on the 50°C model this will change the

temperature to a maximum of 42°C. The

C and with the bridge installed the maximum temperature is

55/60/75°C (75°C is 26ENA6N/L only)

C and

60/75°C (75°C is 26ENA6N/L only)

55/60/75°C (75°C is 26ENA6N/L

model preset temperature is

Turn the water heater off by pressing the ON/OFF button on the remote controller.

2. Disconnect electrical power to the water heater.

3. Remove the front cover of the water heater (4 screws).

Locate bridge attached to the inside of the front cover, and insert the bridge into plastic clip between the remote controller terminals as shown on the right.

5. Replace the front cover of the water heater (4 screws).

6. Reconnect electrical power to the water heater.

21/26ENB serices and 17/21ECB series

Remote controller

Main controller Bathroom controller Bathroom 2 controller

ECM1D

ECB1D ECB2D

55/60°C models

26ECB6N, 26ECB6L 21ECB6N, 21ECB6L 21ENB6N, 21ENB6L 17ENB6N, 17ENB6L

Factory Setting

37 - 55°C 37 - 50°C 37 - 50°C

Bridge in 37 - 60°C 37 - 50°C 37 - 50°C

26ECB5N, 26ECB5L 21ECB5N, 21ECB5L 21ENB5N, 21ENB5L 17ENB5N, 17ENB5L

Factory Setting

37 - 50°C 37 - 50°C 37 - 50°C

42/50

°C

models

Bridge in 37 - 42°C 37 - 42°C 37 - 42°C

Page 24

26ENA series

Installation Manual

Remote controller

Main controller Bathroom controller Bathroom 2 controller

ECM1D

ECB1D ECB2D

55/60/75°C models

26ENA6N, 26ENA6L

Factory Setting

37 - 55°C 37 - 50°C 37 - 50°C

Bridge A 37 - 75°C 37 - 50°C 37 - 50°C

Bridge B 37 - 60°C 37 - 50°C 37 - 50°C

Factory Setting

37 - 50°C 37 - 50°C 37 - 50°C

42/50

26ENA5N, 26ENA5L

26ENA series 21/26ECB series

17/21ENB series

Into Bridge A and Bridge B

Bridge

°C

models

Bridge A 37 - 50°C 37 - 50°C 37 - 50°C

Bridge B 37 - 42°C 37 - 42°C 37 - 42°C

Bridge A

Bridge B

PCB

Remote

Controller

Adjust

Switch

Setting

Modulation

Page 25

Installation Manual

WARNING

• When changing the temperature, make sure to conﬁ rm with the customer that the temperature of

the hot water will be very high and that there is a risk of scalding.

Connecting Remote Controller Cord to Unit

• Tie the excess cord outside the water heater. Do not put the extra length inside the water heater.

• The remote controller cord can be extended up to 35m.

• Be sure to hand tighten when screwing to the terminal block. Power tools may cause damage to the terminal block.

Remote controller cord

• Use remote controller cord for any extensions.

• Install according to the National Electrical Code and all applicable local codes.

1. Disconnect electrical power to the water heater.

2. Leave enough slack so that the remote controller cord will not be damaged if the unit is removed from the wall.

3. Remove the front cover of the heater (4 screws).

4. Pass the remote controller cord through the wiring throughway and into the unit.

5. Connect the Y terminals at the end of the remote controller cord to the terminal block.

6. Secure the remote controller cord with a clamp.

7. Replace the front cover.

Remote Controller Terminals

Remote Controller Cord

Cord Clamp

Wiring Throughways

Remote Controller Terminals

26ECB series and 21ENB series

Cord Clamp

26ENA series

Page 26

Installation Manual

Maintenance

Periodically check the following to ensure proper operation of the water heater.

• The venting system must be examined periodically by a qualiﬁ ed service technician to check for any

leaks or corrosion.

• The burner ﬂ ame must be checked periodically for a proper blue colour and consistency.

• If the ﬂ ame does not appear normal, the burner may need to be cleaned.

• If the burner needs to be cleaned, it must be performed by a qualiﬁ ed service technician.

• Do not obstruct the ﬂ ow of combustion and ventilation air.

See Owner's Guide for further maintenance or consult Dux Hot Water for recommended service checks.

•

Warning:

Should overheating occur, or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. Do not use this appliance if any part has been under water. Immediately call a qualiﬁ ed service technician

Periodically check and clean the ﬁ lter inside the cold water inlet of the unit.

There is a scald potential if the output temperature is set too high.

to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

Servicing by qualiﬁ ed technician should be performed every two years.

Trial Operation

The installer should test operate the unit, explain to the customer how to use the unit, and give the owner this manual before leaving the installation.

• Preparation ........... (1) Open a hot water ﬁ xture to conﬁ rm that water is available, and then close

the ﬁ xture.

(2) Open the gas supply valve. (3) Turn on the power supply. Using the remote controller, turn on the Power

ON/OFF button (the Operation lamp will turn on).

(1) Open a hot water ﬁ xture and conﬁ rm that the Burner on lamp comes on, and that hot water is being

produced. (If necessary, repeat until the air in the gas piping is bled out). * White smoke may be noticed from the exhaust vent during cold weather. However, this is not a

malfunction of the unit.

* If an “11” error code appears on the remote controller, turn the unit off and then back on again,

and then open a hot water ﬁ xture again.

(2) Change the temperature setting on the remote controller and check that the water temperature changes.

• If the water heater does not operate normally, refer to “Troubleshooting” in the Owner's Guide. * After the trial operation, clean the ﬁ lter in the cold water inlet.

Handling after trial operation

• If the unit will not be used immediately, close off all gas and water shut off valves, drain all of the water out of the unit and the plumbing system to prevent the unit and system from freezing, and bleed the gas out of the gas line.

Freezing is not covered by the warranty.

CAUTION

Page 27

Installation Manual

WARNING

A ﬁ re or explosion may result if these instructions are not followed, which may cause lose of life, personal injury or property damage.

Lighting Instructions

This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand.

1. Read the safety information in the installation manual or on the right side of the water heater.

2. Turn off all electrical power to the unit.

3. Do not attempt to light the burner by hand.

4. Turn the gas control manual valve (external to the unit) clockwise to the off position.

5. Wait ﬁ ve minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions

on page 3 of Owner's Guide.

6. Turn the gas control manual valve counterclockwise to the on position.

7. Turn on electric power to the unit.

8. The unit will now operate whenever hot water is called for. If the unit will not operate, follow the shutdown instructions and call a service technician.

Shutdown Instructions

1. Stop any water demand.

2. Turn off electric power.

3. Turn the gas control manual valve clockwise to the off position.

Should overheating occur, or the gas supply fail to shut off, turn off the manual control valve to the appliance.

Page 28

Installation Manual

WATER QUALITY

All Dux water heating appliances are constructed from high quality materials and components and all are certiﬁ ed for compliance with relevant parts of Australian and New Zealand gas, electrical and water standards.

Whilst Dux water heaters are warranted against defects, the warranty is conditional upon correct installation and use, in accordance with detailed instructions provided with the heater. In the case of the water supplied to the heater, it is important that the water quality be of acceptable standard.

The water quality limits/parameters listed in water quality table are considered acceptable and generally, Australian and New Zealand suburban water supplies fall within these limits/parameters.

In areas of Australia and New Zealand where water may be supplied, either fully or partly, from bores, artesian wells or similar, one or more of the important limits may well be exceeded and the heater could, therefore, be at risk of failure.

Where uncertainty exists concerning water quality, intending appliance users should seek a water analysis from the water supplying authority and in cases where it is established that the water supply does not meet the quality requirements of the water quality table, the Dux warranty would not apply.

WATER QUALITY TABLE

Maximum levels

pH Saturation Total Chlorides Sodium Iron

Index(LSI) Hardness

(langelier)

6.5-9 +0.4 to 200mg/l 250mg/l 180mg/l 1mg/l

Minus 1.0

@65C