Revised 04-08-10
YUNCA Leedz FS Fuzzy Feb 2010
Page 7 of 19
CONNECTING THE HEATER TO A GAS SUPPLY
Burn only the fuel for which the heater is equipped.
The YUNCA
LEEDZ
(Fuzzy Logic control) is shipped from the factory equipped to burn either
Natural Gas or L.P.G.
N.B. The Yunca LEEDZ (Fuzzy Logic control) Heater cannot be
converted from LPG to NG, or vice versa.
The data plate affixed to the back of the heater
specifies the gas type, which the heater is factory equipped for.
Gas connection:
The gas inlet is located at the back left hand corner of the heater. The inlet thread is to a male
3/8 ” BSP
A separate gas isolation valve should be installed immediately up stream of the
connection to the 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.
Ensure all gas pipes to the heater are purged by blasted air to remove any material or
filings that may block valves and jets.
All joints should be tested for leaks before operating the heater.
TO CHECK GAS PRESSURE:
1
Remove the front plinth cover (two screws at top of cover).
2
Test point can be seen on the left side of the control box.
3
Slacken test point screw and check pressures.
4
Re-tighten test point screw.
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 pressures at the control must be tested on
installation following the procedure below.
Note: Improper gas pressure will affect heater performance flame colour or cause pilot
malfunction.
Natural Gas:
Input
33MJ
Static Minimum inlet operating pressure
2.0 kPa (8"w.g.)
Minimum inlet operating pressure
1.0 kPa (4"w.g.)
Maximum inlet pressure
5.0 kPa (20"w.g.)
L.P.G.:
Input
28MJ
Static Minimum inlet operating pressure
2.75 kPa (11"w.g.)
Minimum Inlet operating pressure
2.50 kPa (10”w.g.)
Maximum inlet pressure
3.50 kPa (14"w.g.)
CAUTION:
Do not use this heater if any part has been water damaged 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 water damaged.
