Heatmaster Seamless Manual

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Seamless Customer Operation, Installation and Servicing Information

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APPLIANCE SPECIFICATION
Certificate Number: 8107
Date of Issue: 5 Sept 2014
Brand Name:
Heatmaster
Model/s:
Inbuilt Seamless
Description:
Induced draught, luminous and heating power flue effect, mains
power 240V AC
High efficiency gas log space heater
This appliance is for use with Natural Gas.
Certificate Holder:
Heatmaster Pty Ltd.
2/9 Nicole Close, Bayswater, Victoria, 3153, Australia
ABN:
64-641-709-587
Contact:
[phone]
Manufacturer:
Heatmaster Pty Ltd.
2/9 Nicole Close, Bayswater, Victoria, 3153, Australia
Contact:
Tel. [phone]
ABN:
64-641-709-587
Distributor:
Heatmaster Pty Ltd.
2/9 Nicole Close, Bayswater, Victoria, 3153, Australia
Contact:
Tel. [phone]
ABN:
64-641-709-587
Australian Standard:
AS 4553 –2008 (incorporating amendment No 1) “Gas space
heating appliances”

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CONTENTS
SECTION
DESCRIPTION
PAGE
1
PRODUCT OVERVIEW
General Description
4
Operation
2
TECHNICAL DATA
General
5
Construction
7
Gas System
9
Heating System
11
3
Electrical
Operating Instructions
servicing instructions
13
15
4
Trouble shooting
17
5
MARKINGS –APPLIANCE DATA PLATE
19
6
FIREBOX DIMENSIONS
20
Rear View Balanced flue with 58 and 65mm Ø.
Pipes
7
FLUEING
21
Horizontal and vertical flue setup
8
PHOTOGRAPHS
22
Log set up

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PRODUCT OVERVIEW
SECTION
1
General Description
The Heatmaster “Seamless” Log space heater is an induced draft, high efficiency, fan assisted space
heater with a Remote Manual/ Automatic thermostat control, using a 2 step High- Low gas setting. Low is
front burner and high is front and rear burners together. If decorative mode is selected, only the front
burner will ignite and the convection fan will not operate.
The heater gas safety functions are controlled by an AGA approved electronic flame supervision and
ignition controller. This controls the combustion fan, and fan operation is proven by a Cleveland Control
duel pressure switch.
A separate Millennium branded controller handles all other functions including temperature sensing and
control of convection fan speeds Low, High and Off if decorative mode is selected with only the front
burner on. It also communicates with the RF remote.
As well, the two convection fans are enabled by a thermal sensor adjacent to the heat exchanger, once
the firebox has reached operating temperature. The actual fan speeds are selected from the remote and
also modulate automatically in steps (Hi-Low) when required.
Safety features included are:
Flame failure and overheating safety system, automatic shut down if gas or power failure occurs and fan
start-stop protection. On startup the combustion fan runs at a higher speed than normal to automatically
purge any unburnt gas prior to ignition. A glass dress guard is fitted to the heater door to prevent
accidental mishaps.
The Heatmaster Seamless Gas Log space Heater is a room sealed heater that can be installed in three
configurations. The maximum length of flue and air supply pipe is 12 meters.
a) Fitted with two pipes vertical. A 60mm pipe to supply external air and a 50mm flue pipe to expel
combustion products via a balanced flue terminal
b) Fitted with a horizontal balanced flue configuration. A 60mm pipe to supply external air and a
50mm flue pipe to expel combustion products via a balanced flue terminal.
c) Fitted with a combination of vertical and horizontal twin pipes suspended under floor. A 60mm
pipe to supply external air and a 50mm flue pipe to expel combustion products via a balanced flue
terminal
Operation:
The unit is started by the remote control.
The SIT 590DBC starts the combustion fan. The millennium control ramps the fan speed to a higher
setting for 30 seconds to ensure pull in of the pressure switch and to perform a thorough purge. The
pressure switch proves the combustion air and enables the 579 to proceed to start-up. The combustion
fan reverts to a lower operating speed for quietness.
The front burner will ignite first in every case, and the flame detection of this burner is verified by the SIT
579 in approx 5 seconds. After 40 seconds from start up, and only after the front burner has ignited and
satisfied the SIT 579 that it has flame, will the second burner and thermostatic operation be enabled. An
interlock in the SIT 579 control ensures this.
If decorative mode is selected, the unit cannot progress to the second burner stage or any room fan
setting. IE there is no room fan or second burner available in decorative flame mode.
If/when extra heat is required, as decided by the user or the thermostat, the remote control/main control
will allow the second solenoid valve to supply gas to the rear burner, provided the decorative (front burner)
is burning. This burner will ignite by cross-lighting from the front burner. Only the rear burner modulates
on-off depending on thermostat for temperature control. The decorative only burner will not modulate OFF
until switched off by the user or built in timer.
The second solenoid for the rear burner can only be activated when the signal from the SIT 5479DBC
confirms flame at the front burner. The power supply for the rear burner solenoid is provided from the
flame signal of the SIT 579, so the power to the rear burner cannot be applied from any other source. This
setup ensures absolute safety in that the rear heating burner cannot be supplied gas spuriously. The
solenoid valve for the second burner is also a tandem double block approved valve.

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TECHNICAL DATA
SECTION
2
GENERAL
BRAND NAME
Heatmaster
MODEL
Seamless
BURNERS
Heatmaster, Inspiration type Rectangular Bar Burner,
COMBINATION CONTROL
SIT , double block , 840
IGNITION MODULE
SIT, Electronic , 579DBC
BURNER CONTROLLER
SIT , double block , 840
Dungs double block valve for high setting.
REGULATOR
SIT , double block , 840
LOG SET
Everburn, Ceramic Compressed Kaowool , Heatmaster
Seamless
FLUEING OPTIONS
1. Vertical twin pipe through the roof and connected to a
balanced flue terminal.
2. Horizontal twin pipe through the wall and connected to
a balanced flue terminal
3. Combination vertical and horizontal twin pipes
suspended under floor and connected to a balanced
flue terminal
Note: The flue length must not exceed 12 meters.
OPTIONS (Test Laboratory Assessed)
Must be installed on a fireproof base.
The following clearances from combustible materials must be
observed: Above 300mm. Sides 12mm. Rear 10mm

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TECHNICAL DATA
SECTION
2
GENERAL
Gas Type: Natural Gas @ 0.88kPa Test Point Pressure
Burner
Injector Size (mm)
N.G.C. (MJ/h)
Minimum. Front burner
1.95
18
Maximum. Both burners
1.95
36
Dimensions / Weight:
Model
Width
(mm)
Depth
(mm)
Height
(mm)
Weight
(kg)
Heatmaster
Seamless Inbuilt
1295
495
465
85kg
Star Rating
Model
Heatmaster Seamless
4.0/4.2 Stars (Flue
dependent)
The test point pressure is set with ‘both burners’ on maximum.
BURNERS are ON –OFF only

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TECHNICAL DATA
SECTION
2
CONSTRUCTION
General
The Heatmaster Seamless Gas Log Heater comprises of a metal fire box
structure and a Heat Exchanger located within an outer casing, which has a
transparent ceramic glass front door.
The heat exchanger includes a primary heat exchanger (firebox) subject to gas
heating, a secondary heat-exchanger made of tubular members heading from
the firebox and connecting to the inlet header of the manifold flue fan box. The
secondary heat exchanger is made of corrugatedflexible stainless steel tubes,
which are connected at their other end to the combustion fan, so as to extract
and expel the combustion products from within the firebox, the tubular members
and the manifold box.
The combustion products are expelled to the atmosphere by the combustion fan
through a flexible aluminium flue system of 50mm diameter to a balanced
terminal.
Two convection room fans are positioned at the bottom of the fire box structure
so as to draw cool air from the room through an opening at the lower end of the
firebox fascia this air is heated by passing through the outer surfaces of the
primary and secondary heat exchanger’s and finally expelled into the space
being heated. The double convection fans are so situated, that it provides a
cooling effect on the working components, such as combustion fan and adjacent
electronic controls. The cooling effect is not necessary in decorative mode and
the convection fans do not operate.
The firebox is made of 3 pieces of 1.2mm thick Aluminized steel sheet, press
folded and assembled and joined by TIG/MIG welded construction.
The burners are fastened to the firebox assembly by two locating slots and 3.2
mm screws located at each ends of the burner tray.
The front of the firebox is sealed with the door frame made of one piece of 2.5
mm thick mild steel sheet, pressed and folded. The door is sealed with a 19mm
Ø. fiber glass rope and a fiber glass tape around the 5.0mm Ceramic glass
edges. Four M6 x 35mm screws mount the door assembly on the firebox and
maintain it in place firmly and gas tight. The external outer panels and fascia are
made of pressed and folded 1mm thick Aluminized Steel. The external front trim
is aluminum.
Refer Drawings HMR-716-206,213,215,216,217,218,227,228,229 & 230
Primary Guard
GLASS
The primary guard is 5.0mm Ceramic glass approximately the size of the door
assembly. It is hung on supporting brackets at each end, is approximately 20mm
from the door glass and is removable for cleaning etc. It allows convection
between the glass and the door for cooling of the guard. The edge gaps
preclude the temperature test cone as per AS4553
Refer Drawings HMR-716-201,262 & 263

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TECHNICAL DATA
SECTION
2
Primary Air
The primary Air for combustion is drawn into the firebox through a 60 mm pipe of
1.6mm mild steel attached to the firebox back side air inlet hole opening of 60
mm diameter
Refer Drawing HMR-716-212
Combustion Chamber
The Combustion Chamber is made of 1.2mm aluminized steel with the burners
sitting inside the firebox elevated from the bottom. The rear and front rails and
the 2 burners separate the bottom and top halves into combustion chamber on
top and required secondary air for the correct combustion and flame pattern in
the bottom. The bottom space is connected to the air inlet on the back of the
unit. The volume of the firebox is 92 litres including the volume of the logs. The
internal top rear corner of the firebox, from where the combustion gases are
evacuated is covered by a baffle made of 1.6mm aluminized steel to restrict the
flow of flue gases and to protect this area from the intense heat.
Refer Drawing No. HMR-716-206,209,229 & 230
Primary Flue
Connection
The primary flue connection is made of a 50mm N.B. aluminum flexi tube made
by Abbey and attached to the back of heater by a 50mm hose clamp.
Flue Cap
See Appendix 3. Flue Cowl Assembly
Refer Drawing No. 043

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TECHNICAL DATA
SECTION
2
GAS SYSTEM
Gas Piping
To bring the gas supply, the inlet gas pipe consists of a 12.7mm Ø. by
400mm long corrugated flexible stainless steel pipe manufactured by
Dormont America, the other end of the pipe is connected to the Sit gas
valve, which delivers the gas to the injector burner (front and rear) by
using copper pipe and manifold of ½” mm Ø and 3/8” Dormant
corrugated tube.
Gas inlet connection
Gas inlet fitting is a ½” BSPM plated steel fitting supplied with the ½”
Dormont Pipe. This connection is located at the rear left bottom corner of
heater. ,
AGA Approval No. 5531
Gas Control
SIT ,Model SIT 840 Type Gas Valve
Maximum working pressure 5 kPa
Temperature Limitation 60°C Maximum
220-240V / 50-60Hz
Inlet connection: 1/2" RC series (AS 1722.1)
Outlet connection: 1/2" RC series (AS 1722.1)
The SIT 840 valve incorporates the following features:
1 individual gas outlet controlled by double block solenoids
Two automatic shut off valves –AS 4624 Class 2 and 3
AGA Approval No. 5733
Pressure test point (Burner)
8.9mm Ø Brass Nipple with removable screw and washer, located lower
left front of the heater accessible at all times. The test point is remote
from the gas train and connected by small bore copper tube to the main
gas manifold.
Refer Drawing No HMR-716-250
High burner solenoid
This is an AGA approved EBM double block gas valve without
regulator and can only be powered from the SIT control after
flame is successfully sensed at front burner.
Model No: GB-D 055
AGA Approval No: 7858
Alternate, Kupo valve
AGA approval No: 8054

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TECHNICAL DATA
SECTION
2
Injectors
Length: 35.5mm
Diameter: 10mm
Thread: 1/8 BSP male
Refer Drawing HMR-716-214
Burner Details
The Heatmaster Seamless series heaters utilise a two bar burner
assembly mounted at the bottom of the firebox, below the ceramic logs
mounting tray.
Burner ‘Front’ bar
This burner is a single piece 50 X 20mm X 1.5mm RHS mild steel
construction and with an inspirator tube 20mm SHS welded at right
angles to, and under the burner body.
Ports are drilled.
Primary air is drawn through a single 5 mm Ø hole in the inspirator tube.
The burner is NOT interchangeable with the rear burner and cannot be
incorrectly located.
Refer Drawing No. HMR-716-220,221,222 & 223
Burner ‘rear’ bar
This burner is a single piece 50 X 20mm X 1.5mm RHS mild steel
construction and with an inspirator tube 20mm SHS welded at right
angles to, and under the burner body.
Ports are drilled.
Primary air is drawn through a 7.5mm Ø hole drilled through both sides
of the inspirator tube.
The burner is NOT interchangeable with the front burner and cannot be
incorrectly located.
Refer Drawing No. HMR-716-224,225

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TECHNICAL DATA
SECTION
2
HEATING SYSTEM
Type
Induced draught power flue, fan assisted convection with flame effect.
Radiants
Everburn, Ceramic Compressed Kaowool Log set. See Photos Page 17
& 18 for location. Location lugs ensure correct placement
Warm air outlet
Located in top front of heater above fire box.
ELECTRICAL SYSTEM
Electrical Details
A 240 volt ignition is used on this appliance.
Burner controller
SIT, Model 579/571 DBC TW -35S TS-5S.
Maximum temperature: 55C
Power rating: 220-240Vac / 50-60Hz
Spark gap: 3.0mm
AGA Approval No. 7358
Ignition Box
Same as above
Ignition Switches
N/A
Spark Plug
Spark igniter on front burner bar,
Techrite part # 07714392
Firing Tip Material: Inconel
Wiring
Ignition Module & Ignition Switches
Maximum temperature: 60C
Power rating: 220-240Vac / 50-60Hz
Spark Plug Leads
Teflon or silicon rubber coated
Maximum temperature: 280C
Power rating: High tension Wire

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TECHNICAL DATA
SECTION
2
ELECTRICAL SYSTEM (Cont’d)
Power cord
2 metres Flex standard 3 pin plug 10 amp, brand Castle Electronic, or
equivalent approved cord set.
Conform to AS3100 240V 50Hz
Maximum temperature: 120C
Power rating: 220-240Vac /7 Amp 50-60Hz
Room Fan
2 Cross flow fans , TORIN FTZ180 single phase shaded pole motor
Maximum temperature: 90C
Windings thermally protected inherently (inductive reactance.)
Power rating: 50W 240Vac / 50Hz
Flue Fan
FIME (induced draft), model number. GR-03455
Temperature range: 0C to 100C
Maximum Winding temperature: 180C
Power rating: 220-240Vac / 50-60Hz
Pressure switch
Cleveland Control, model number.NS2 -1088-00 set at 50 Pa.
Temperature range: -40C to 88C
Power rating: 5 Amp @ 220-240Vac / 50-60Hz
AGA Approval No. 7290
Over temperature switch
Techrite model T24A180BXR2-15, Bimetallic N/C Auto-reset cut-
out 180C 10Amp –250 V a/c.
Room Fan thermistor
controller
150C thermistor epoxy body made by Millennium Electronics
Rated at 100Kohm @ 25 C
Millennium control
Millennium electronics control: 5200-0153-01A maximum running temp
65C

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Customer Operating Instructions SECTION 3
The Heatmaster Seamless Gas log space Heater has been designed for a simple and efficient
operation with the use of remote control.
PRE OPERATIONS CHECKS
Prior to operating the heater, ensure that the flue terminal is not obstructed furthermore, make sure
there are no combustible objects leaning against, resting on,
Or within the immediate vicinity of the unit. Check that the heater main power and gas supply are
connected and switched on.
OPERATING THE HEATER
The Seamless is operated by the remote controlled thermostat unit.
For complete remote operating instructions refer to attached Thermostat manual included with this
heater.
But here are some basic instructions so you can override some functions to operate your heater.
1.-To ignite your heater simply press the ON/OFF power button. The heater will automatically start the
ignition sequence within approximately 30 seconds of self-checking and the heater will ignite.
2.-The fan will not start until the heater has reached the minimum operating temperature. To select
fan speed or the heat setting press the up or Down
buttons in the remote controller, to decrease or increase differential temperature between room and
thermostat and flame and fan speed will be increased or decreased as desired.
The fan will not operate at all in decorative flame mode.
3. If you wish to switch between flame only (decorative) and heating mode, simply press the A/M
button on the remote control.
TURNING THE APPLIANCE OFF
Press the on/ off switch once. The room fan will continue to operate for a short period while the
heater cools down.
Please note:
1. - Due to the performance and efficiency of the heater, steam may be noticed coming
From the flue terminal on cool days
2. - As this appliance has a luminous effect some slight carbon deposition may
Occur in the logs.
3. - During first time firing of this appliance, an odour may be noticed for a short
Period as the paint cures. It is advisable to leave the windows open during the first few hours of
the very first operation only.
SAFETY PRECAUTIONS
IMPORTANT POINTS
! DO NOT place articles or clothing on or against this appliance
! DO NOT use or store flammable materials near this heater
! DO NOT place any item containing liquid on the heater
! DO NOT spray aerosol in the vicinity of this appliance when it is in operation
! ALWAYS supervise young children near the appliance
! DO NOT MODIFY THIS APPLIANCE
It is recommended that a secondary guard be used, to prevent access to appliance by children, as
outer panels of this appliance may reach high temperatures.
NOTE: In the event the electricity supply cord is damaged it must be replaced with the original
Heatmaster part obtainable from your authorized dealer.
It is recommended that a general service be carried out every 12 months to ensure the optimum
operation of your Seamless fire.
For servicing, or parts replacement parts contact your Heatmaster dealer

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Page 15 of 24
SERVICING INSTRUCTIONS
HEATMASTER SEAMLESS ROOM HEATER
ALL SERVICE WORK TO BE CARRIED OUT BY A QUALIFIED & AUTHORISED
PERSON
*Do not modify this appliance
WARNING : Before you do any attempt to service the heater be sure that electric power plug has
been disconnected.
This heater should be serviced at least once a year to clean the Room Fans from lint and dust
accumulated in the air ducts and unit.
This heater does not require to be removed to service and maintain any items such as logs, gas
valves, room fans, electronic control components.
The unit does not require disassembly to access the gas pressure test point.
The gas regulator test point is accessible after removing the front glass guard and the test point will
be visible at the front lower left hand side of the unit.
The unit does require access into the combustion chamber to adjust the gas regulator through the
back wall of the chamber.
The gas adjustment for the regulator is accessible after removal of the main inner door and the left
hand logs. There is provided a small access panel that can be opened and a long series flat bladed
screwdriver can be inserted through the hole and into the regulator screw of the SIT control valve.
AFTER ADJUSTMENT ENSURE THAT ACCESS COVER IS CLOSED AND SECURED.
To service the main items listed above it is necessary to remove the Combustion Chamber.
Disassemble in this order:-
1. - To access the logs and burner components. Remove the outer door glass guard and undo the
four screws that hold the door. Two at the top of door frame where the hot air outlet is and two at the
bottom of door above the room air inlet.
2. Remove the logs and store safely.
3. The burners can be removed by removing the screws (visible each end of the unit) holding the
Burners and cover plates. The igniter electrodes can be removed by undoing the 2 retaining screws
on the front burner.
Remove the front and rear covers and then remove the burners by slipping them forward and
upwards together.
4. The heat exchanger is held by 2 screws in the bottom of the burner box. Remove these.
5. Remove the top angled baffle at inside top/rear of combustion chamber by removing the screws
and spacers taking note of the spacers at the front of the baffle.
6. There are 8 nuts visible that must be removed to release the internal flue connection. Ensure that
gasket is not damaged in this removal, or that gasket is replaced upon re-assembly.
7. At the bottom rear of the combustion chamber, each side of the air inlet hole there are 2 screws
visible. Remove and observe sealing gasket condition as above in (6.|)
8. Remove combustion chamber by lifting and pulling forward.
9. The main components are concealed in sealed insulated boxes each side of the heater. NOTE: the
gas components are in the LHS box as viewed from front, and the electronic controls are housed in
the RHS box. There is one room fan in each box, total of 2.
10. To access these components carefully remove the top insulation of the desired box, and undo the
screws holding the box lid. Note that there are rubber diaphragm gaskets for the fan. These are
flexible and do not require removal. Lift off lid and access the components. It may be necessary to
remove one or both corrugated heat exchanger tubes for ease of access.
11. The main control box is mounted in the RHS box on a bracket along with the pressure switch.
There are screws holding this bracket to the unit floor.
As well the main gas SIT control box is mounted adjacent to this bracket.

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The room fan(s) are similarly mounted on brackets. Ensure that all brackets and insulating bushes are
re-assembled onto new fan if not provided with the fan.
Ensure that all wires and hoses are marked for ease of re-assembly as unit will not test out unless
fully assembled.
12. The gas components are mounted in the LHS box. Most connections are flare jointed for ease of
disassembly. The wiring is polarised to prevent misconnections, as are the fan plugs.
13. Re-assemble unit in reverse order taking care that:-
a. The component boxes are re-sealed and insulated.
b. Any gasketing is in good condition or renewed with factory supplied gaskets or material.
c. All screws firmly tightened.
d. Unit is gas-leak tested.
e. Unit is fired up for final check and gas burner pressure checked and reset if necessary.
Note the power cord supplied must not be replaced
Important
The outer glass is fitted to this appliance to reduce the risk of fire or injury
from burns and it should not be permanently removed. This glass still gets
very hot and therefore, for protection of young children or the infirm, a
secondary guard is required.

Page 17 of 24
TROUBLESHOOTING GUIDE SECTION 4
PROBLEM
POSSIBLE CAUSE
REMEDY
Appliance fails to
ignite.
No gas or supply pressure insufficient.
No electrical supply.
Incorrectly wired power point.
Incorrect gas valve adjustment.
Insufficient time allowed between
attempts.
Internal wiring disconnected.
Ensure gas supply connected, purged, and
pressure appropriate.
Ensure unit plugged in and switch is on, check
supply fuse.
Check supply. Active, neutral, & earth must be
correctly orientated and connected.
Adjust valve pressures.
Wait at least 30 seconds for unit to purge
combustion chamber after switching on.
Check all plugs inside appliance are connected
properly and correctly located, Ensure
operation of combustion fan & air pressure
switch.
Unit will not
operate on Low.
Incorrect gas valve adjustment.
Incorrect or loose wiring.
Adjust valve.
Check wiring.
Room fan not
operating.
Insufficient time allowed.
Loose wiring.
Fan not located correctly.
Fan blocked.
Fan has a delayed start and will not start until unit
warms-up.
Check wiring.
Install fan in correct location.
Remove and clean fan.
Unit cuts out after
a period of time
then cycles on
and off.
See “Room fan not operating”
Heat exchanger blockage.
Excessive pressure or incorrect gas
type.
See “Room fan not operating”
Clean heat exchanger.
Ensure correct gas type, injector size, and pressure
setting.
Excessive carbon
(soot) deposits on
inside of firebox,
logs, and/or glass.
Incorrect gas type or pressure setting.
Primary air shutter incorrectly adjusted
for gas type.
Ensure correct gas type, injector size, and pressure
setting.
Adjust primary air shutter.
Excessive flame
height.
Incorrect gas type or pressure setting.
Ensure correct gas type, injector size, and pressure
setting.
Excessive flame
“lift off”
Flue or inlet blockage.
Clear blockage.

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Recirculation of flue gases.
Flue incorrectly installed.
Unit fails to heat.
See “Room fan not operating”
Incorrect gas type or pressure setting.
Gas supply blockage.
See “Room fan not operating”
Ensure correct gas type, injector size, and pressure
setting.
Check injector, burner supply pipe, & valve for
foreign matter.
All service work to be carried out by a qualified & authorised person.

Page 19 of 24
Markings –Appliance Data Plate SECTION 5
Heatmaster Seamless Data Plate

Page 20 of 24
Table of Contents
Description
Page
Rear View Balanced flue with 58 and 65mm Ø. Pipes
20
Balanced flue Terminal
21
Empty Fire box
22
Rear left log in position
Left & center rear logs in position
23
Left, center & right rear logs in position
Front left log in position
Front left & right logs in position
24
Two small logs complete the log set
Firebox dimensions SECTION 6