Yunca Gas EIB Installation guide

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EIB
ELECTRONIC INBUILT
GAS HEATER
2002
OPERATIONS, MAINTENANCE &
WARRANTY INFORMATION

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CONTENTS:
PAGE
INTRODUCTION 3
INSTALLATION 4
FLUE INSTALLATION 5
CLEARANCES 6
CONNECTING THE FAN 6
CONNECTION TO GAS SUPPLY 7
TESTING PRESSURES 8
OPERATION 9
MAINTENANCE/CLEANING 11
FAULT FINDING GUIDE 15
Appendix A PARTS LIST 17
Appendix B INJECTOR SIZES 17
Appendix C WARRANTY 18
WARRANTY REGISTRATION 19

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INTRODUCTION.
Welcome and congratulations on purchasing your YUNCA ELECTRONIC INBUILT FLUED GAS
HEATER.
Please read the following information carefully before attempting to operate the heater and ensure all
members of your household understand how this elegant and highly efficient heater functions.
Please fill out and return the Warranty registration and installation check list
card promptly.
These instructions should be stored in a convenient safe place for ready reference. If you have any
questions regarding your heater please contact your YUNCA dealer.
The YUNCA ELECTRONIC INBUILT FLUED GAS HEATER is a listed gas-fired, conventionally
vented, room heater tested by independent laboratories to New Zealand standards.
The installation of the YUNCA ELECTRONIC INBUILT FLUED GAS HEATER must be carried out
by a suitably qualified person and comply with the current New Zealand installation code, NZS
5261:1996. (For Australian Installations, code AG 601)
CAUTION: This appliance must be vented to atmosphere via a sealed flue system. Installation and
repair of the YUNCA ELECTRONIC INBUILT VENTED GAS HEATER should be done by a
qualified person. The appliance should be serviced at least annually by a qualified service person.
Control valve compartments, burners, fan, and air circulating passageways of the ELECTRONIC
INBUILT must be kept free from any lint and dust build up to ensure efficient and safe operation of the
heater. Regular cleaning will aid this.
DO NOT PLACE ARTICLES ON OR AGAINST THIS APPLIANCE.
DO NOT USE OR STORE FLAMMABLE MATERIALS NEAR THIS APPLIANCE.
DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE WHILE IT IS
OPERATIONAL.

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INSTALLATION
Considerations
The most desirable and beneficial location for a YUNCA ELECTRONIC INBUILT HEATER is in the
centre of a building, thereby allowing the most efficient use of the heat created.
The location of windows, doors and the traffic flow in the room where the heater is to be located,
should all be considered.
To obtain maximum heat distribution with any heater a ceiling fan can be fitted.
Another important consideration when installing the Yunca ELECTRONIC INBUILT is availability
of power supply to the fan and plumbing of gas line.
When the appropriate position has been selected, the unit can be inserted into the prepared cavity that
includes a level base. The fire shall be attached via bolt holes to the floor to ensure that the unit remains
secure in the event of an earthquake or similar.
If the heater is being attached to a concrete floor dyna bolts should be used, if the floor is wooden the
bolts used should be long enough to go fully through the floorboards and fixed with nuts and washers
from the underside.
The earthquake brackets are located at the front corners of the heater and are exposed by removing the
hearth.

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CLEARANCES
The YUNCA ELECTRONIC INBUILT FLUED GAS HEATER should be installed with clearances
equal to or greater than those recommended below and comply with NZS 5261.
CONNECTING THE FAN
The fan should be connected to the mains supply (240V 50Hz) via the 3m flex and 3pin plug provided.
The lead is factory positioned for a left-hand plug position as shown above.
The cord is stored and attached to the cowl for freighting.
When inserting the heater into the cavity, ensure the cord is not damaged.
If power lead is to repositioned on the right hand side, during installation remove the cord grommet
from the LH side panel. Remove the hearth and grill to run the power cord in front of the fan box and
along the cowel base. Eg as low as possible to ensure it is kept cool. The rubber grommet is
repositioned to fit in to the slot in the RH panel to protect the power cord from damage.
Note: Do not position the Power lead on top of the fan.

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CONNECTING THE HEATER TO A GAS SUPPLY.
Burn only the fuel for which the heater is equipped.
The YUNCA ELECTRONIC INBUILT may be shipped from the factory equipped to burn natural gas,
L.P.G. or propane. The data plate affixed to the base of the heater and specifies the gas type that the
heater is factory equipped for. Fuel Conversion Kits are available, contact your YUNCA agents.
Gas connection:
The gas inlet is located behind the hearth fascia panel. The inlet is a female 3/8" BSP access is shown
in the following pages.
A separate gas isolation valve should be installed immediately up stream of the connection to the
appliance.
If the heater is intended to run on natural gas, the supplied in line regulator should also be installed in
the gas line.
WARNING: To stop pipe compounds entering the gas line, do not apply sealing compounds to the first
two threads at the tip of any gas connection. All joints should be tested for leaks before operating the
heater.
GAS PRESSURE REQUIREMENTS
PRESSURE TESTING:
Important Gas Pipe sizing: The supply pipe size should be determined from NZS 5261 to ensure
correct gas supply to the appliance. Incorrect pipe sizing WILL affect the performance of this
appliance.
WARNING: To stop pipe compounds entering the gas line, do not apply sealing compounds to the first
two threads at the tip of any gas connection. All joints should be tested for leaks before operating the
heater.
Gas pressure requirements
Correct gas pressure and the use of a properly sized gas supply line is essential for the safe and efficient
performance of this appliance. The inlet and outlet pressures at the control must be tested on
installation.
Note: Improper gas pressure will affect heater performance, flame Colour or cause pilot malfunction.
Natural Gas:
Minimum inlet pressure 1.25 KPa (5"w.g.)
Maximum inlet pressure 5.0 KPa (20"w.g.) With supplied inline regulator fitted.
Operating pressure 1.0 KPa (4"w.g.)
L.P.G. (NZ Only) and Propane
Minimum inlet pressure 2.75 KPa (11"w.g.)
Maximum inlet pressure 3.5 KPa (14"w.g.)
Operating pressure 2.5 KPa (10"w.g.)
CAUTION: Do not use this heater if any part has been under water or exposed to moisture causing
corrosion.
A Qualified service technician should inspect the heater and replace any part of the gas system that
has been under water.

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GAS PRESSURE TESTING:
Fig 4 A manometer is required to check the gas supply and operating pressures.
To attach manometer, remove the hearth by removing the four
screws and gently lifting clear.
This will expose the control valve so manometer tubes can be
attached to the pressure taps as shown below.
Important: ensure pressure tap is tightened and checked for
leaks after testing. Fig 5
Control Valve, Parts Fig 4 & 5
1 On-off solenoid valve EV1
2 On-Off solenoid Valve EV1
3Inlet Pressure tap point. Tightening torque 1.0 Nm.
4Outlet pressure tap point Tightening torque 1.0 Nm.
5Connection for pressure regulator / combustion chamber
Fig 6 Outlet pressure Adjustment compensation.
6Servo-pressure regulator
7Gas outlet pressure modulator
8Pilot outlet
9Main gas outlet
10 Side out let
11 Slow opening device
NOTE: Modulator pressure adjustments (Fig 6) are factory set. It is
not expected that adjustment will be required during installation.
The out let pressure is adjusted by removing the Modulator
Plastic Cap E.
WARNING: to ensure correct operation of the modulator the
Plastic Cap E must be returned to its original position.
MAXIMUM PRESSURE: The modulator is adjusted by
screwing in nut C to increase the outlet pressure and screw out to
decrease it.
MIMIMUM PRESSURE: Turn off the power supply and,
keeping nut C stationary, screw in Screw D to increase the pressure and screw it out to decrease the
pressure.
Carefully put back the modulator plastic cap.

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Thermostat
Unit will not start if thermostat is set on zero or below the temperature sensed by the sensing bulb.
The thermostat-sensing bulb is found behind the hearth.
In some installations the thermostat-sensing bulb may need to be repositioned to accurately sense the
room temperature. Reposition in an unobtrusive place.
Electrical
The unit is connected to the mains supply (240V 50Hz 0.5Amp) via the 3m flex with 3 pin plug.
Commissioning
When installed the installer should operate the heater to ensure that all features are operating
correctly. Refer to the Operation section for instructions.
Eg. On / off operation, Ramp up and down of Fan Speed and flame height.
OPERATION
Power Supply connected and Turned on.
Gas supply connected and turned on.
Fig 7 Thermostat
Thermostat control is at the front of the hearth
The thermostat must be adjusted to a temperature above the room
temperature or the thermostat will not allow the burners to light.

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Fig 8 Hand Control
Direct the infrared beam from this hand control to the receiver mounted
behing the hearth. The receiver will “light up” when receiving a signal
from the hand control.
The Hand control operates on 4 AAA size alkaline batteries. Remove the
battery cover on the back of the hand control to insert batteries paying
attention to the polarity
Note multiple pushes of a button may cause a lock out in the electronics. If
this happens turn the power supply off and restart the Gas fire.
Pressing the On / Off button once will initiate the lighting sequence. The
Receiver will light up. The lighting sequence will take approximately 30
seconds and a faint clicking maybe heard as sparking takes place.
Pressing the On / Off button a second time will turn off the fire.
Flame height (heat output) is increased by pressing on the + sign of flame
button and reduced by pressing the – sign of the flame button.
Fan speed is increased by pressing on the + sign of fan button and reduced by pressing on the – sign
of the fan button.
Pressing Off delayed will initiate a 30-minute timer delay off. This can be cancelled by re-pressing
the Off delay button.
Turning on your YUNCA ELECTRONIC INBUILT
1. Turn the Gas and Power supply on.
2. Adjust the thermostat to above the sensed temperature to allow the fire to light.
3. Press the On / Off button once. Neon on the hearth will light up to indicate the control is active.
Note Neon will remain on to indicate unit is active. There may not be any flames as the thermostat may
be set below the temperature it is sensing. If going on holiday make sure light is off.
4. The burners will light at the previous setting and fan speed.
5. Adjust the Flame height button as required to achieve the required heat out put.
6. Adjust Fan speed button to achieve the optimum speed.
Turning off no time delay.
1. Press On / Off button once. Note the Neon will be off to indicate the fire is turned off. The
power supply can be turned off.
Turning off with time delay.
2. Press Off delayed button once.
3. The Neon light will flash to indicate the timer delay activated.
4. When the 30 minutes is up the fire will shut down.
5. The restart, follow the to start procedure.
The time delay can be over ridden by following the Turning off no time delay.

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MAINTENANCE
A qualified service person recommended by your YUNCA dealer should conduct an annual inspection
and undertake any maintenance required on your YUNCA ELECTRONIC INBUILT. Its venting and
installation must be checked to keep it running safely and efficiently. The following procedures should
be performed only by a qualified service person. The gas supply and electrical power should be isolated
whenever any maintenance procedures are undertaken.
Note: the front glass can only be removed after the heater has been turned off for long enough
that the door has cooled to touching temperature.
REMOVING THE FRONT DOOR.
Cleaning The Log Set And Firebox.
During the annual inspection and maintenance appointment, the service person should clean dust, lint
and any light soot accumulation from the logs and the fire box area. An extra soft brush should be used
on the logs as they are extremely fragile. If at any time the logs cannot be removed or installed without
force, the cause must be found. The logs must never be forced.
Procedure,
1. Remove front door as described previously
2. Remove the front log set from the firebox by lifting it up and out. Brush it gently over a newspaper
and carefully place it out of the way.
3. Remove the back log and clean it in the same way.
4. The bark tray can be removed by lifting and pulling it straight out, with the bark still on it.
5. The bark consists of a mixture of vermiculite and composite chips and it can be dusted by sieving.
If needed a replacement bag can be ordered through your YUNCA dealer.
(See parts list for reference number)

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6. With firebox empty a vacuum cleaner can be used to remove any visible dust and lint from within
the firebox area.
7. Replace logs in the reverse order of removal.
8. Replace the bark tray and redistribute the bark.
9. Replace and relatch the front door and close the side panels.
Fan assembly removal
Booster fan assembly Electronic (IR93) is not designed to be dismantled.
IMPORTANT.
Unplug the fan from the power supply.
1. Remove the four screws that retain
the louver
2. hearth.
3. Remove the Thermostat Sensing
Bulb from the Saddled on the Fan Back
Plate before removing the Fan Back
Plate.
4. Disconnect the Earth Wires at the
bottom of the Fan.
5. Unplug the electrical connection at
the back of the electronic control box.
6. Disconnect the wires from the Thermostat behind the Right Hand side panel. This is achieved by
removing the back panel control cover. Easing the back cover of the Thermostat box up to allow
access to the electrical connections.
7. Lifting the Fan Box assemblies clear of the attachment screws ensuring the wires come freely from
the appliance.
8. The fan can be replaced or cleaned. Cleaning should be completed with out disassembly.
NOTE: The fan assembly should only be disassembled by an electrician or trained
Yunca Technician.
9. The process is reversed for installation and the fans operation is tested.

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Electronic flame controller removal
Electronic Flame Ccontroller Assembly (IR05) is not designed to be dismantled.
1. IMPORTANT. Unplug from the power supply.
2. Remove the hearth. Unscrew the four screws and lift clear.
Fig10 Burner Control Unit plugged into the 845 Sigma Control Valve
3. Unplug the wires, Spark
Electrode, Modulating Valve,
Spark electrode earth and
Burner control Earth.
4. The Burner control unit is
plugged in to the 845 Sigma
Control Valve. To remove
unscrew the Right hand screw
and unplug the Burner Control
Unit with a Firm Pull.
5. The control Box is
removed by sliding forward
5mm and then lifting the
hooks clear.
6. Unplug the earth wire and
the wire bundle to the fan at
the back of the Control Box.
7. The Electronic Flame Controller Assembly should be replaced,
8. A new Electronic Flame Controller Assembly is replaced in the reverse order.
NOTE: The wires retained by ties must be securely positioned to ensure that insulation is not
damaged causing a short circuit due to excessive heat.
M o d ulatin g Va lve W ire
Spark E lectrod e Earth
Bu rn er C o ntro l Ea rth
S park E lectro d e R igh t H an d S crew
Burn er co ntrol Unit
8 45 S igm a C o n tro l Va lve

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Fault Finding:
SYMPTOM PROBLEM CORRECTIVE
Pilot Flame Will Not
Light.
Thermostat turned
down below the room
temperature
Turn the thermostat up to a setting above
room temperature.
Move the thermostat bulb to a position
that accurately senses the room
temperature
No Neon light on the
hearth
Check remote light is operating when a
button is activated. Change remote
batteries
Ensure beam from the remote is activating
the LED behind and to the left of the
Hearth.
Ensure power supply is on.
Check the fuse in the back of the control
Box. Remove the plinth front to get
access.
No spark at pilot burner. Check connection between electrode in
pilot assembly and lead from control
Poor or no spark Clean any build up (Carbon) on or around
the Spark electrode.
Tracking of spark along spark electrode
lead. Replace the spark electrode
Damaged spark electrode lead, Replace
No gas at pilot burner Clean the gas ways of soot or foreign
particles.
Check that isolating valves are turned on
and gas is available.
Check pilot hood for blockage
Remove pilot jet and blow clean.
Check for any obstructions in the gas line
that may cause low pressure or restrict
flow.
Purge gas lines.
Sparks but the length is
incorrect.
Spark gap should be 3-4mm between the
electrode and the pilot flame hood outlet.
No Supply Gas. L.P.G. -- Refill tank
Natural -- Check with gas supplier

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Pilot will not stay lit Weak or improperly
located pilot flame.
Adjust the height of Flame Rod. The
flame should engulf the top 6mm of the
thermocouple.
Thermocouple not
properly connected.
Check connections
Defective Flame Rod. Replace Flame Rod.
A new thermocouple may be ordered
through your YUNCA agent.
Faulty control. Replace 845 Sigma Control Valve and/or
Replace Electronic Controller Assembly
Soot is being
deposited on logs or
glass
Log impinging the
flames
Re-position logs back against the stops
Remove any protruding point on the log.
There is insufficient
secondary air in the
combustion chamber.
Check the back of the heater for blockages
around the air intake slots.
Check that the clearances around the
heater match those stated in this manual.
Flueway blocked Remove blockage.
LPG gas mix incorrect Contact supplier to clean out bottle
Flame Height very large
or very low.
Use remote and Ramp up or down.
Incorrect gas pressures. Check and set gas
pressure to manufacturers specifications.
Main burners
extinguishing.
Flue down draughting. A vacuum in the room causes this.
Turn off heater. Turn off all air
conditioners, expelair fans, other heaters
etc. Open doors and windows to allow
pressure to equalise. Re-light heater.
Close doors and windows but not
completely.
Pilot flame is not large
enough.
Check that pilot assembly is correctly
mounted and that the pilot burner flame
hood directs the pilot flame over both
burners and the Flame Rod
Severe down draught. Ensure a recommended flue cowl has been
fitted and is still in place.
Pilot burning, no gas
to burners
Burner injectors may be
blocked.
Clean out injector orifice.
Faulty control Electronic Control Valve or Controller
requires replacement.

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APPENDIX A
PARTS LIST:
PART NO. PART NAME
IR04 845 Sigma Control Valve
IR05 Electronic Flame Controller Assembly
660202 Pilot assembly Electronic
IR07 Spark Electrode Electronic
IR06 Flame Rod
IR90 Pilot pipe assembly
IR91 Front burner pipe assembly
IR92 Rear burner pipe assembly
LZ-G10 Adjustable N.G. inline regulator
EROS05 Log Set
APPENDIX B
INJECTOR SIZE:
GAS TYPE FRONT BURNER BACK BURNER
NATURAL 2.3mm diameter 2.8mm diameter
L.P.G. 1.15mm diameter 1.15mm diameter
PROPANE 1.25mm diameter 1.25mm diameter

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Warranty:
The Yunca Electronic Inbuilt Gas Heater is covered by a limited Five-Year Warranty against defects
in materials and workmanship.
All gas and electrical components including control, burners, pilot assembly, tubing, fan and switchers
are warranted for a period of one year from date of purchase.
Glass and surface coatings are also warranted for one year.
Damage caused by neglect, improper use, acts of god, theft, or any other indirect, incidental cause are
not covered by this warranty.
This warranty is void if the recommended service schedule is not implemented as suggested in this
manual and carried out by a suitably qualified person.
Limitations of Liabilities:
Yunca Heating hereby waivers any liability for incidental and consequential damage directly or
indirectly sustained, or for any loss caused by the application of this product not in accordance with the
current printed instructions.
Our liability is expressly limited to replacement of defective goods as per above warranty. Any claim
shall be deemed waived unless made in writing to Yunca within 30 days from the date that it was or
reasonably should have been discovered.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

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CUSTOMER COPY
YUNCA ELECTRONIC INBUILT WARRANTY REGISTRATION:
Serial No._________________ Gas Type. _____________ Purchase Date_______________
Purchaser’s Name. ___________________________________________________________
Purchaser’s Address. _________________________________________________________
City. _____________________________ PostCode. ____________ Telephone __________
Where Purchased. ____________________________________________________________
Installed By. ________________________________________________ Date. _____________
Yunca Gas Dunedin
PO Box 500
DUNEDIN
Telephone [phone]
Email [e-mail]
Cut along here…
This section must be returned within 10 days of purchase.
YUNCA ELECTRONIC INBUILT WARRANTY REGISTRATION:
Serial No._________________ Gas Type. _____________ Purchase Date_______________
Purchaser’s Name. ___________________________________________________________
Purchaser’s Address. _________________________________________________________
City. _____________________________ PostCode. ____________ Telephone __________
Where Purchased. ____________________________________________________________
Installed By. ________________________________________________ Date. _____________
Return to: Yunca Heating
PO Box 932
INVERCARGILL