Kaden KEX Series User guide

Ducted Gas Heaters
Safety Information
Installation
Commissioning
Models
INSTALLER’S
MANUAL
Universal:
KUN3 | KUN4 | KUN5
External
KEX3 | KEX4

Kaden Installer's Manual
Ducted Gas Heaters
2
Table of Contents
Warnings and Important Information 4
Scope 6
1. General Guidelines 7
1.1 Inspection......................................................................................................................................................... 7
1.2 Unpacking the Heater ...................................................................................................................................... 7
1.3 Unloading or Lifting the Heater ........................................................................................................................ 7
1.4 Gas Inlet Connection ....................................................................................................................................... 8
1.5 Electrical Power Supply ................................................................................................................................... 8
1.6 Installation of Duct Connection Pops............................................................................................................... 8
1.7 Heater Positioning............................................................................................................................................ 9
1.8 Installation of Internal Heaters ......................................................................................................................... 9
1.8.1 Installing in the Roof Space................................................................................................................. 9
1.8.2 Installing Beneath the Floor................................................................................................................. 9
1.9 Installation of Internal Heaters - Room, Enclosure or Plant Room................................................................ 10
1.10 External Installations ...................................................................................................................................... 10
2. KUN Universal Model Guidelines 11
2.1 Heater Dimensions......................................................................................................................................... 11
2.2 Platform & Service Clearances ...................................................................................................................... 11
2.3 Internal Installation ........................................................................................................................................ 12
2.3.1 Splitting the Heater ............................................................................................................................ 12
2.3.2 POP Configuration Installation........................................................................................................... 12
2.3.3 Return & Supply Air POP Rotation Procedure .................................................................................. 13
2.3.4 Internal Model Flueing Instructions.................................................................................................... 14
2.3.5 Kaden Remote Flue Terminal............................................................................................................ 14
2.4 External Installation........................................................................................................................................ 15
2.4.1 Supply Air Overheat Switch Position (KUN530 & KUN330 ONLY)................................................... 15
2.4.2 Modifying KUN Model Duct Orientation............................................................................................. 15
2.4.3 Installation of Flue Terminal............................................................................................................... 16
2.4.4 Area to Cut Out in Wall...................................................................................................................... 16
2.4.5 Installation of Flashing ....................................................................................................................... 17
2.4.6 KUN3 & KUN4 models....................................................................................................................... 17
2.4.7 Thermistor Installation KUN4 & KUN5............................................................................................... 18
3. KUN4 & KUN5 19
3.1 Wiring a Damper Motor to the Heater’s Control Module ............................................................................... 19
3.1.1 Damper Motor Connections............................................................................................................... 20
3.1.2 RJ Socket Connections ..................................................................................................................... 20
3.1.3 RJ12 socket detail on heater PCB..................................................................................................... 20
4. KEX External Model Guidelines 21
4.1 Heater Dimensions......................................................................................................................................... 21
4.2 Service Clearances ........................................................................................................................................ 21
4.3 Installation ...................................................................................................................................................... 22
4.3.1 Area to Cut Out in Wall...................................................................................................................... 22
4.3.2 Installation of Flashing ....................................................................................................................... 22
4.3.3 Installation of Flue Terminal............................................................................................................... 23
4.3.4 Flue Terminal Clearances.................................................................................................................. 23

3
5. Fan Speed KUN3, KEX3 & KEX4 24
5.1 Fan Speed Setting For KUN3, KEX3 & KEX4 Models .................................................................................. 24
5.1.1 To Adjust The Fan Speed.................................................................................................................. 24
6. Ducting Information 25
6.1 Minimum Recommended Return Air Grille Selection Chart .......................................................................... 25
7. Outlet Guide 26
7.1 Outlet Register Chart ..................................................................................................................................... 27
8. Wall Control Installation 28
8.1 Networker Installation KUN4 & KUN5............................................................................................................ 29
8.1.1 Wiring the Networker to a KUN4 & KUN5 Heater ............................................................................. 29
8.2 Manual Wall Control Installation .................................................................................................................... 30
8.2.1 Wiring the Manual Wall Control to a KUN3 Heater ........................................................................... 30
8.2.2 Wiring the Manual Wall Control to a KEX4 & KEX3 Heaters ............................................................ 30
9. Commissioning KUN4 & KUN5 32
9.1 Heater Control Settings.................................................................................................................................. 32
9.2 Installer Parameters Via Networker ............................................................................................................... 33
9.2.1 Networker Installer Parameter KUN4 & KUN5 .................................................................................. 33
9.2.2 Adjust Networker Parameters............................................................................................................ 34
9.3 KUN4 & KUN5 Commissioning Instructions .................................................................................................. 34
9.3.1 Initial Ignition and Gas Inlet Pressure Check .................................................................................... 34
9.3.2 Heater Fan Speed and Temperature Settings................................................................................... 35
9.3.3 Final Checks ...................................................................................................................................... 36
9.4 Fault Code Identification on Heater PCB....................................................................................................... 36
9.4.1 NG-3 L.E.D Identification ................................................................................................................... 36
9.4.2 Error codes associated with installation ............................................................................................ 37
10. Commissioning KUN3, KEX3 & KEX4 38
10.1 Commissioning Instructions ........................................................................................................................... 38
10.1.1 Start & Check Supply Pressure ......................................................................................................... 38
10.1.2 Start & Check Burner Pressure ......................................................................................................... 38
10.1.3 Setting the Fan Speed ...................................................................................................................... 39
10.1.4 Final Checks ...................................................................................................................................... 39
11. Technical Specifications 40
12. Technical Support 41

4
Kaden Installer's Manual
Ducted Gas Heaters
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Failure to carefully read and follow all instructions in this manual can result in equipment malfunction,
property damage, personal injury and/or death.
WARNINGS: WHEN IGNORED, CAN RESULT IN SERIOUS INJURY OR DEATH.
CAUTIONS: WHEN IGNORED, CAN RESULT IN MINOR INJURY OR PRODUCT DAMAGE.
SHALL / MUST/
IMPORTANT: INDICATES A MANDATORY REQUIREMENT OF THIS MANUAL.
SHOULD:
INDICATES A RECOMMENDED REQUIREMENT OF THIS MANUAL.
Any deviations from these instructions may void the warranty. As a result, the customer
and/or installer may be charged a fee for product non-warranty related call outs. Also,
note that failure to comply with these instructions may preclude servicing of the unit.
DISCLAIMER:
This document is a guide only. Laws, regulations and industry standards can vary
between States and Territories. Accordingly, this guide MUST BE read in conjunction
with, and subject to, all laws, regulations and industry standards applicable in the State
or Territory in which the products are installed. You MUST ensure that the installation
of the products will comply with those laws, regulations and standards, and that the
products recommended to customers are t for the purpose for which they are intended.
WARNING
REGULATORY / INSTALLATION / SAFETY
This appliance SHALL BE installed in accordance with:
Manufacturer’s Installation Instructions and the Kaden Sizing Guide.
Current AS/NZS 5601 (Gas Installation Standard), AS/NZS 5141 (Residential Climate Control
Systems), AS/NZS 3000 (Electrical Codes) and Local Gas / Electrical authority regulations.
Current AS 4254 Ductwork for air-handling systems in buildings, EPA guidelines and HB276-2004
“A Guide to Good Practice”
Local Regulations and Municipal Building Codes (BCA) including local OH&S requirements.
ALWAYS comply with the following precautions to avoid dangerous situations and to ensure optimum
performance.
This appliance MUST BE installed, maintained and removed by an Authorised Person.
DO NOT place any articles on or against this appliance
DO NOT use or store ammable materials near this appliance
DO NOT spray aerosols in the vicinity of this appliance while it is in operation
DO NOT modify this appliance
This appliance is NOT intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety
Children should be supervised to ensure that they DO NOT play with the appliance.
NOTE
The Kaden Networker controller is used as a Wired Wall Thermostat and is also the interface to
set Installer Parameters and obtain diagnostic information on the Kaden KU4 and KU5 Ducted
Gas Heaters. A spare Networker should be kept on hand for such purposes.
IMPORTANT
WARNINGS AND IMPORTANT INFORMATION

5
NOTE
The manufacturer cannot guarantee compatibility and support for anyone using 3rd party
accessory/devices (device) on any of their appliances.
The suitability, compatibility or functional performance of any 3rd party device is entirely the
responsibility of the device’s supplier or installer.
Any 3rd party device, technical, installation, operation, performance or other enquiries need to be
referred to the device’s supplier or installer.
Any adverse effects of 3rd party devices on the operation, performance or reliability of this
appliance is not covered by the manufacturer’s product warranty.

6
Kaden Installer's Manual
Ducted Gas Heaters
This Installer’s Manual is intended to be used as a guideline for the installation of Kaden Gas Fired Central
Heaters. It covers only the installation and commissioning of the heater and the allowable ueing congurations.
Although recommended return air grilles and allowable duct outlet quantities are specied, it does not cover the
actual ducting design required to suit the installation.
This Installer’s Manual is based on Australian codes – for all other applications, please refer to local codes and
regulations.
Kaden heaters must be installed and serviced by qualied personnel.
Models covered in this manual are as follows:
Kaden Universal Heaters Type of Wall Control (Thermostat) Supplied
KUN5 Series KUN521 Kaden Networker
KUN530
KUN4 Series
KUN415
Kaden Networker
KUN420
KUN425
KUN430
KUN3 Series
KUN315
Kaden Manual
KUN320
KUN325
KUN330
Kaden External Heaters Type of Wall Control (Thermostat) Supplied
KEX4 Series
KEX415
Kaden ManualKEX420
KEX428
KEX3 Series
KEX315
Kaden ManualKEX320
KEX328
NOTE
All Kaden models are Natural Gas ONLY.
All Kaden models are non-condensing.
Universal models may be used in both internal & external applications.
For more details refer to “11. Technical Specications” on page 41
Networker
KUN5 & KUN4
Manual
KUN3, KEX3 & KEX4
SCOPE

7
1. GENERAL GUIDELINES
Kaden heaters are designed to provide a central source of heat for a ducted central heating system.
Kaden heaters should not be installed downstream from an air washer, an evaporative cooler or refrigerative
cooling system. Nor are they designed to be installed on a marine craft, houseboat, or any similar environment.
Kaden heaters must be installed in accordance with these instructions and related regulations, codes, standards,
and authorities. These include but may not be limited to:
• Kaden Sizing Guide
• AS/NZS 3000 – Electrical Installations
• AS/NZS 5601 – Gas Installations
• AS/NZS 5141 – Residential Climate Control Systems
• AS 4254 – Ductwork for Air-Handling Systems in Buildings
• Local Building Regulations
• HB 276 – A Guide to Good Practice
• Environment Authorities
• Local Gas and Electricity Authority Codes
• Building Code of Australia (BCA)
IMPORTANT
The installer assumes the responsibility for equipment installed in violation of any code, regulations
and these installation instructions.
It is recommended the Kaden Sizing Guide be followed in estimating heating requirements and
for system design that will result in efcient installation and provide a higher level of comfort and
economical operation.
For the hourly input and the gas type to be used, see the appliance data label located inside the
service compartment or "11. Technical Specications" on page 40.
1.1 INSPECTION
This appliance has been inspected and tested at the time of manufacture, packaged and released for transportation
without known damage. Upon receipt, inspect the exterior for evidence of rough handling in shipment.
Ensure that the appliance is labelled correctly for the gas to which it is intended to be connected. Immediately
report to supplier any discrepancies or damage.
NOTE
This appliance can only be connected to Natural Gas.
1.2 UNPACKING THE HEATER
Heaters are supplied with a box cover. To unpack:
• Cut and remove any nylon straps.
• Lift the box off and dispose of thoughtfully.
• Remove the packaging and dispose of thoughtfully.
NOTE
Always remove and dispose of the plastic lm before mounting the heater onto a base box (if
tted).
1.3 UNLOADING OR LIFTING THE HEATER
When unloading or lifting the heater, ensure lifting equipment is in good operating condition and capable of lifting
the total load.
Ensure there is a clear area to place the heater down, which is within reach of the lifting equipment.

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Kaden Installer's Manual
Ducted Gas Heaters
NOTE
If tting the heater to elevated heights such as a roof, use suitable lifting equipment.
1.4 GAS INLET CONNECTION
• All piping must be in accordance with AS/NZS 5601 and any local gas regulations.
• The connection point for all Kaden model heaters is a female G3/4 compression tting to AS 3688. For KEX
models this is located at the base of the heaters outer cabinet, and for KUN models the gas feed tube is supplied
loose in the control compartment and MUST BE tted to suit the installation.
• A gas cock shall be tted in the gas line adjacent to the heater and in a convenient location so it can be turned
OFF quickly and easily.
• The gas supply shall in no way interfere with any servicing of the heater.
NOTE
The gas supply must be installed by a licensed gas tter. The gas pipe and gas meter should be
sized so the heater can maintain its required incoming gas pressure at maximum consumption
with all other gas appliances operating at their maximum capacity at the same time as the heater.
1.5 ELECTRICAL POWER SUPPLY
The heater is pre-wired with a 3-pin plug and lead, and shall be plugged into a standard 10 Amp 220 to 240 volt
xed switched socket outlet adjacent to the heater, in a convenient location so it can be turned OFF quickly and
easily.
NOTE
A qualied electrician must install the 220 to 240 volt wiring according to local regulations.
IMPORTANT
Switch OFF the power and unplug the heater before touching any wiring. If any electrical wiring is
damaged, it must be replaced by the manufacturer, its service agents or an electrically qualied
technician, in order to avoid a hazard.
The electricity supply must be 220 to 240 V at 50 Hz, and from an authorised power supplier. Generators should
never be used, as their output may be incompatible with, or prone to damage the heater’s electronic components.
1.6 INSTALLATION OF DUCT CONNECTION POPS
On Kaden KUN Series heaters, the pops need to be fastened to the heater cabinet as follows:
• Insert pops into the hole in the POP plate, ensuring the POP ange is placed over the prescribed wall of the
cabinet, refer to the “POP Installation Matrix” below.
• Spread POP ange to t tightly into the hole in the cabinet (the notch side overlapping the other).
• Secure pops with the rivets supplied.
POP Installation Matrix
Series Return Air Supply Air
Number of walls Installation POP Number of walls Installation POP
KUN3 1 No Option 2 Inner Wall
KUN4 2 Inner Wall 2 Inner Wall
KUN5 2 Inner Wall 2 Inner Wall
Table 1
NOTE
The POP is tted to a POP plate for some models and a panel for others.

9
1.7 HEATER POSITIONING
Install the heater in a position that allows adequate and safe access for service as per guidelines in this manual
and applicable standards. The cost of any equipment and additional labour involved in accessing such heater
installations will not be accepted for warranty purposes.
NOTE
All service clearance measurements must be adhered to, otherwise this will impede the
serviceability of the heater.
1.8 INSTALLATION OF INTERNAL HEATERS
All Kaden Universal models are primarily designed to be installed in the roof or beneath the oor. This must be
done in accordance with the following guidelines and AS/NZS 5601.
1.8.1 Installing in the Roof Space
• The area under the heater shall be capable of supporting the additional load, without causing deformation of
any part of the building structure.
• The appliance shall be accessible by means of xed access, a normal ladder or steps.
• A passage of 600mm wide shall be provided between the roof access opening and the heater.
• This passage shall have a suitable walkway of at least 19mm thick particle board or equivalent.
• A permanent level platform shall be provided beneath the heater and this platform area shall extend 750mm
out from the controls access panel side and fan motor access panel side/s for the entire length of the heater.
• The air gap created between the base of the heater and the platform by the heater’s legs shall be maintained.
• Permanent articial lighting shall be provided at the heater, with the switch located at the roof access opening.
1.8.2 Installing Beneath the Floor
• There shall be a minimum clearance of 200mm between any part of the appliance and the lowest part of the oor
structure. In addition to this, refer to “Service Clearances” for the specic Kaden KUN model.
• The heater shall be located within 2m of the access opening, or there is to be a minimum clearance of 1.2m
between the lowest part of the oor structure and ground level, maintained from the access opening to the
heater.
• All under oor installations shall be on a level concrete base (50mm thick), and provision made to drain any
condensate, seepage or ground water away from the heater.
• Permanent articial lighting shall be provided at the heater with the switch located at the access opening.
• Lateral (horizontal) ues may be installed in accordance with AS/NZS 5601, ensuring that the lateral ue section
has a minimum rise of a 20mm per metre of lateral run.
• The ue shall be terminated outside the building in accordance with AS/NZS 5601. For KUN heaters, termination
can be performed using a Remote Flue Terminal. Refer to Internal Model Flueing instructions for the specic
Kaden KUN model.

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Kaden Installer's Manual
Ducted Gas Heaters
1.9 INSTALLATION OF INTERNAL HEATERS - ROOM, ENCLOSURE OR PLANT ROOM
In a room, enclosure, residential garage or a plant room with natural ventilation conditions.
Installation of a gas appliance in a room or enclosure for properties approved for construction PRIOR TO
31st March 2014.
1. Determine if the unit(s) MJ/hr rating for each cubic metre of the room or enclosure, is greater than 3 MJ/hr per m³.
e.g. Unit rating (Ur) = 120MJ/hr
Room volume (Rv) = 1m x 1m x 2.4m = 2.4m³
Ur/Rv = 120/2.4 = 50 MJ/hr per m³ > 3 MJ/hr per m³
Additional ventilation required in the room or enclosure.
2. Two permanent openings are required, each equivalent in area to the determined value “A”. The lower vent
shall be located close to the oor or at burner level. The upper vent shall be located at or above the top of the
unit. The two openings may be combined as long as the above conditions are met.
Determine free ventilation area using A = T x F.
Where A = The minimum free ventilation area, mm2
T = The total gas consumption of all gas appliances, MJ/hr, i.e. KUN521 = 90MJ/hr
F = The factor detailed in the below table
Gas appliance location Source of Ventilation Factor F
Gas appliance in a room or enclosure Directly to outside 300
Via an adjacent room 600
Gas appliance in a plant room Directly to outside 150
Via an adjacent room 300
Table 2
NOTE
DIRECTLY TO OUTSIDE is either through an outside wall, into a cavity vented to outside, into
an underoor space or roof space vented to outside.
Installation of a gas appliance in a room or enclosure for properties approved for construction AFTER
31st March 2014.
1. Determine if the unit(s) MJ/hr rating for each cubic metre of the room, enclosure, residential garage or plant
room is greater than 0.4 MJ/hr per m³.
e.g. Unit rating (Ur) = 120MJ/hr
Room volume (Rv) = 1m x 1m x 2.4m = 2.4m³
Ur/Rv = 120/2.4 = 50 MJ/hr per m³ > 0.4 MJ/hr per m³
Additional ventilation required in the room, enclosure,residential garage or plant room.
Refer to AS5601 for natural ventilation requirements.
NOTE
For all other applications, e.g. Mechanical Ventilation, refer AS/NZS 5601.
1.10 EXTERNAL INSTALLATIONS
Kaden KEX3 & KEX4 External, KUN3, KUN4 & KUN5 Universal models can be installed outside of the house. For
an installation under a house oor, a KUN3, KUN4 or KUN5 Universal model should be chosen.
All heaters that are installed externally on the ground should be installed on a level concrete base or pad, and there
must be provision made to drain away any surface water from the heater.
If the heater is to be installed in an elevated position or on a roof, the installation must comply with AS/NZS 5601.
It must be secured to prevent movement and it must have adequate provision for service access.

11
2. KUN UNIVERSAL MODEL GUIDELINES
2.1 HEATER DIMENSIONS
Ø SaØ Ra
H DIG
F
E
B
JC
A
K
Model A B C D E F G H I J K ØSa ØRa
KUN521 657 1046 430 15 104 510 238 187 621 575 423 300 300
KUN530 707 1096 550 15 240 560 280 280 536 540 474 350 350
KUN415 625 845 397 15 95 495 197 197 446 445 471 300 300
KUN420 625 845 397 15 95 495 197 197 446 446 471 300 300
KUN425 625 845 397 15 95 495 197 197 446 447 471 350 350
KUN430 644 923 549 15 246 515 237 201 483 447 491 350 350
KUN315 627 844 408 15 95 496 230 197 414 445 471 300 300
KUN320 627 844 408 15 95 496 230 197 414 445 471 300 300
KUN325 627 844 408 15 95 496 230 197 414 445 471 350 350
KUN330 645 941 552 15 240 516 236 235 468 470 491 350 350
All dimension in mm
Diagram 1
2.2 PLATFORM & SERVICE CLEARANCES
BB
AA
CC
Platform
& Service
Area
i
ii
DD
EE
Minimum Service
Clearance
Internal External
Method 1 Method 2
A = Front 750mm 750mm 500mm
B = End 750mm N/A 300mm
C = End N/A N/A 300mm
D = Top 250mm 800mm 1000mm
E = From Platform &
Service Area
D + The height of the heater
(Heater height = Diagram 1 dimension A)
Diagram 2
i. There are two methods of installing the KUN series internally, in ceilings and under the oor.
Method 1 is for when the minimum clearance (B) at the Fan cabinet end is available.
Method 2 is for when the minimum clearance (B) at the Fan cabinet end is not available.
ii. This minimum clearance height (E) must be maintained across the entire Platform and Service Area.
IMPORTANT
For all internal installations, permanent articial lighting shall be provided at the heater, with the
switch located at the access opening.

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Kaden Installer's Manual
Ducted Gas Heaters
2.3 INTERNAL INSTALLATION
2.3.1 Splitting the Heater
The KUN model heaters can be split for ease of installation. To split the heater, follow these simple instructions.
1. Remove the heater’s roof after removing the roof screws.
2. Disconnect the gas valve, overheat/pressure switch loom, igniter and ame sensor from the control board.
3. Disconnect the ue pipe.
4. Remove the screws fastening the fan cabinet tabs to the heat exchanger cabinet. These are located at the
top of the heat exchanger cabinet on the heater’s split line.
5. Pivot the fan cabinet upwards high enough to dislodge the lower locking tabs xed to the fan cabinet near
the base.
6. The heater is now split in two.
7. Protect the exposed looms and tabs from damage while the heater is split in two.
8. Once ready, reassemble in reverse order.
IMPORTANT
Ensure when reassembling the heater that everything is put back and connected correctly.
2.3.2 POP Configuration Installation
POP conguration can be changed to suit the installation site, for the preferred and alternative duct connection
options refer to Diagram 3.
Heat exchanger
cabinet
Fan cabinet
Plan View
Supply Air Side Return Air Side
Diagram 3
NOTE
In "Diagram 3" the grey arrows denote the preferred option and is the factory delivered
conguration. The white arrows denote the available alternative options.

13
2.3.3 Return & Supply Air POP Rotation Procedure
For KUN model heaters the return air POP can ONLY be changed from the front side to back side. The supply air
POP can be changed from front to back or end of heater (refer to Diagram 3 page 12).
2.3.3.1 All KUN3, KUN4 & KUN5 Models Return Air POP Rotation Procedure
1. Remove screws securing the lid and remove the lid.
2. Remove the screws securing the POP panel, blanking panel, and remove panels.
3. Swap panels to opposite sides and fasten with the same screws.
4. Secure lid with original screws.
2.3.3.2 KUN315, KUN320 & KUN325 Supply Air POP Rotation Procedure
1. Remove the screws securing the outer POP plate and remove outer POP plate.
2. Remove the screws securing the nominated outer POP blanking plate and remove outer POP blanking plate.
3. Remove the screws securing the inner POP blanking plate and remove inner POP blanking plate.
4. Relocate and secure inner POP blanking plate in new location.
5. Relocate and secure outer POP plate and outer POP blanking plate in their new locations.
6. The pressure switch and mounting bracket will need to be swapped to the POP panel that is being exchanged.
2.3.3.3 KUN415, KUN420, KUN425, KUN430, KUN330 Supply Air POP Rotation Procedure
1. Remove screws securing the lid and remove the lid.
2. Remove the screws securing the POP panel, blanking panel, and remove panels.
3. Remove gas feed tube plate and secure to alternate panel.
4. Swap panels to nominated sides and fasten with the same screws.
5. Secure lid with original screws.
6. For the KUN330 ONLY the pressure switch and mounting bracket will need to be swapped to the POP panel
that is being exchanged.
2.3.3.4 KUN521 Supply Air POP Rotation Procedure
1. Remove the screws securing the outer POP plate and remove outer POP plate.
2. Remove the insulation that is beneath the outer POP plate.
3. Remove the screws securing the nominated outer POP blanking plate and remove outer POP blanking plate.
4. Remove the screws securing the inner POP blanking plate and remove inner POP blanking plate.
5. Relocate and secure inner POP blanking plate in new location.
6. Insert the outer POP insulation in new location.
7. Relocate and secure outer POP plate and outer POP blanking plate in their new locations.
2.3.3.5 KUN530 Supply Air POP Rotation Procedure
1. Remove screws securing the lid and remove the lid.
2. Remove the screws securing the POP panel, blanking panel, and remove panels.
3. Remove POP and blanking panel insulation.
4. Remove POP blanking panel and fasten in new location.
5. Insert POP and blanking insulation into their new locations.
6. Swap panels to nominated sides and fasten with the same screws.
7. Secure lid with original screws.

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Kaden Installer's Manual
Ducted Gas Heaters
2.3.4 Internal Model Flueing Instructions
General
• All ues must be installed in accordance with AS/NZS 5601.
• Horizontal ues must have a minimum rise of 20mm per 1m run.
• Horizontal ues terminating on a wall must be at least 300mm above ground level.
• An external ue terminal clearance to an opening in a building shall be no less than 1000mm in the vertical
direction and 300mm in the horizontal direction.
• Systems with both vertical and horizontal ue runs should be treated as all horizontal.
• 1 x 45º bend is equivalent to 0.5 x 90º bend (i.e. 2 x 45º bends = 1 x 90º bend).
• Provide adequate support to ue sections (e.g. saddles / strapping).
100mm non-corrosive metal ue.
• Requires a 100mm round single or twin wall non-corrosive metal ue, suitably terminated.
• All ues must have a bolted ue sleeve connection to allow for repairs and/or removal of the appliance.
• Twin Wall ue - maximum ue length of 6m.
• Single Wall ue - maximum ue length of 2m.
• Up to 4 x 90º elbows are permitted with the same length requirements specied above.
2.3.5 Kaden Remote Flue Terminal
In specic installations, for example under the oor, it is recommended that a remote terminal be used to terminate
the ue on the outside wall of the building.
Please refer to instructions supplied with a Remote Flue Terminal (KADEN PART NO. 1621343).
Diagram 4 depicts a typical KUN series heater underoor conguration.
Ground level
Wall
Remote flue terminal
House floor
Level concrete base
Control cabel access
Gas Inlet
Flue outlet
Minimum 20mm rise per 1m run
Power lead
300mm
Minimum
A= Maximum flue length
For single skin flue A = 2m
For twin skin flue A = 6m
Diagram 4

15
2.4 EXTERNAL INSTALLATION
2.4.1 Supply Air Overheat Switch Position (KUN530 & KUN330 ONLY)
For external installations of the KUN530 (refer to Diagram 5) and KUN330 (refer to Diagram 6) heaters the supply
air overheat switch position must be changed from end discharge to side discharge modify as follows:
2.4.1.1 KUN530
1. Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected from the
end discharge overheat switch behind the burners.
2. Reconnect the quick connect terminals (Orange / White) to the side discharge overheat switch. These
terminals can be identied by the label "SIDE DISCHARGE O/H SWITCH".
Flue Terminal
Connection
KUN530
End Discharge O/H Switch
quick connect terminals
(factory default connection)
Side Discharge O/H Switch
quick connect terminals
12
O/H Switch Loom
Diagram 5
2.4.1.2 KUN330
1. Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected to the end
discharge overheat switch behind the burners.
2. The KUN330 is tted with both left and right side discharge O/H Switches, reconnect the quick connect
terminals (Orange / White) to the O/H Switch on the same side the air is supplied from. These terminals can
be identied by labels on the sheet metal plate above the burner "LEFT SIDE DISCHARGE O/H SWITCH"
or "RIGHT SIDE DISCHARGE O/H SWITCH".
Flue Terminal
Connection
KUN330
Left Side Discharge O/H
Switch quick connect terminals
1
2
2
LR
End Discharge O/H Switch
quick connect terminals (factory
default connection)
O/H Switch Loom
Right Side Discharge O/H
Switch quick connect terminals
Diagram 6
2.4.2 Modifying KUN Model Duct Orientation
The duct orientation of KUN series heaters can be reversed if the installation requires it. For more information refer
to "2.3.3 Return & Supply Air POP Rotation Procedure" on page 13.

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Kaden Installer's Manual
Ducted Gas Heaters
2.4.3 Installation of Flue Terminal
The ue terminal for KUN series heaters is not supplied, and
MUST BE ordered separately when a KUN series heaters is
to be installed externally (KADEN PART NO. 1621303).The
ue outlet socket is located on the fan cabinet end of the heater.
• Remove labels and packaging from the ue terminal, then
insert into the ue outlet socket.
Ground
level
Wall
Level
concrete
base
Flashing
Open area of flue terminal
IMPORTANT
The ue terminal MUST BE orientated correctly,
rotate the ue terminal to ensure that the ue
gases are expelled away from the dwelling (refer
to Diagram 7).
The ue terminal MUST always be installed
before starting the heater.
Diagram 7
2.4.4 Flue Terminal Clearances
Heaters should be positioned so that the following minimum clearances exist when measured from the ue edges.
Clearance Description
75mm From the wall against which the heater is mounted.
From a drain or soil pipe.
300mm
From a flue terminal, cowl or combustion air intake.
Below eaves, balconies or other projections.
From the ground, above a balcony or other surface.
To a return wall or external corner.
Measured horizontally, from an opening window, door, non-mechanical air inlet or any other opening into the
building (except sub floor ventilation) or 1500mm in direction of discharge.
500mm From an electricity meter or fuse box (prohibited area extends to ground level).
1000mm
Measured vertically, from an opening window, door, non-mechanical air inlet or any other opening into the
building (except sub floor ventilation).
From a gas meter.
From a mechanical air inlet, including a spa blower, measured both vertically and horizontally.
A flue terminal of this type shall not be located under a roofed area, unless the roofed area is fully open on at
least two sides, and a free flow of air at the appliance is achieved.
Table 3
2.4.4 Area to Cut Out in Wall
When installing the heater at ground level, create two holes to suit the pops all the way to ground level (refer to
Diagram 8), or one rectangular hole to cover the distance of both pops ensuring there is no impediment to the
structural integrity of the dwelling.
Ground level
Level concrete base
Wall cut-out areas
Diagram 8
NOTE
Refer to "2. KUN Universal Model Guidelines" on page 11 to obtain the required dimensions.

17
2.4.5 Installation of Flashing
2.4.5.1 KUN5 models
Flashing MUST BE tted to ensure the ductwork is adequately weather protected.
Step 1. Fit side ashing using existing screws on
cabinet sides.
Step 2. Fit ashing rail using the existing screws
from the cabinet.
Silcone
Step 3. Slide top ashing with fold under ashing
rail. Once in place silicone along the
upstanding face of top ashing.
Step 4. Push the heater up against the wall and
secure side ashing to the wall.
NOTE
It is important to allow for sufcient slack in the ducting connected to the heater’s pops, to allow
the heater to be moved out from the wall if required for servicing.
2.4.6 KUN3 & KUN4 models
NOTE
For installation of ashing refer to the instructions provided with the ashing kit.
KUN315, KUN320, KUN325, KUN415, KUN420 & KUN425 use Kaden Part No. 1621299
KUN330 & KUN430 use Kaden Part No. 1621300

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Kaden Installer's Manual
Ducted Gas Heaters
2.4.7 Thermistor Installation KUN4 & KUN5
All KUN4 and KUN5 heaters are supplied with a remote thermistor assembly. The thermistor must be installed in
the supply air duct, between 1m to 3m away from the heater, but NEVER beyond the rst Branch Take Off (BTO)
tting.
NOTE
Where an Add-On air conditioning indoor evaporator coil is installed, the thermistor MUST BE
located in the discharge air POP of the indoor cooling coil.
These installation practices promote more accurate supply air temperature control and optimise heater performance.
• Ensure that there is at least 1 metre of appropriately sized ducting installed between the heater and the rst BTO
tting (or evaporator coil).
• Drill a 20mm diameter hole through the top of the inlet end of the rst BTO tting (refer to Diagram 9) or through
the top of the evaporator coils discharge POP.
• Carefully insert the thermistor assembly (probe end rst) into this hole and secure using the self drilling screw
provided. Seal any remaining openings with duct tape.
• Ensure that the thermistor lead is secured to timbers or duct outer casing (refer to Diagram 9) to prevent
damage.
Where the rst BTO tting is installed more than 3m away from the heater, an additional duct joiner (installer
supplied) will be required so that the thermistor assembly can be tted correctly. Install the joiner between 1m
to 3m away from the heater ensuring that the thermistor can reach this joint. Then follow the steps above as per
normal practice.
Thermistor
Diagram 9

19
3. KUN4 & KUN5
KUN4 & KUN5 heaters can be congured for adaptive zoning and / or Add-On Refrigerative Air Conditioning.
There are four 24 VAC relays on the PCB control module, which can be congured either for four zone motors, or
for four zone motors and an add-on refrigerative air-conditioning control, refer to Diagram 10 below.
Control Board
Grommet for
control cable
access
KUN5/4
24 VAC
ADD-ON
REFRIGERATION
D
A
B
C
24 VAC ZONE
DAMPER MOTOR
24 VAC ZONE
DAMPER MOTOR
24 VAC ZONE
DAMPER MOTOR
24 VAC ZONE
DAMPER MOTOR
Diagram 10
3.1 WIRING A DAMPER MOTOR TO THE HEATER’S CONTROL MODULE
a. 24 Vac Power Open / Power Close Damper Motor
ZONE B
ZONE A
N/C
0V
N/O
N/C
0V
N/O
Close
Common
Open
Damper Motor
24VAC
Power Open/
Power Close
RJ12
Connectors
b. 24 Vac Power Open / Spring Return Damper Motor
ZONE B
ZONE A
N/C
0V
N/O
N/C
0V
N/O
Active
Neutral
Damper Motor
24VAC
Power Open/
Spring Return
RJ12
Connectors
c. 240 Vac Power Open / Power Close Damper Motor
ZONE B
ZONE A
N/C
0V
N/O
N/C
0V
N/O
Close
Common
Open
Active
Neutral
240VAC Supply
Damper Motor
240VAC
Power Open/
Power Close
240VAC Relay
RJ12
Connectors
Diagram 11

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Kaden Installer's Manual
Ducted Gas Heaters
3.1.1 Damper Motor Connections
All KUN4 and KUN5 series gas ducted heaters come with four RJ12 socket connectors precongured for Belimo®
24V damper motors.
3.1.2 RJ Socket Connections
The plastic cover on the PCB includes moulded cut-outs to enable access to the RJ12 socket. For each socket to
be used, press out and remove the cut-out and connect the RJ plug from the Belimo®damper motor.
If not a Belimo damper motor conrm suitability of the terminal on the damper motor before connecting to the RJ12
socket on the heater PCB. The RJ12 socket in Diagram 12 contains six terminal wires, the left two are connected
to Normally Open (N/O) on the 3-way terminal block, the middle two are connected to '0V', and the right two are
connected to Normally Open (N/C). Check the installation manual accompanying the damper motor to determine
if the RJ12 socket on the heater PCB is suitable.
3.1.3 RJ12 socket detail on heater PCB
Diagram 12 details the Normally Open (NO) and Normally Closed (N/C), Zero Volt (OV) and Normally Open (N/O)
connections for the RJ12 socket connections for zones A, B, C and D on heater PCB. These connections required
to enable the networker outputs to control the damper motors.
N/C
0V
N/O
N/O N/C
0V
Diagram 12
Note: Ensure that the circuits are correct to Diagram 11 as applicable.