4
Installation
Pellet Store and Feed Screw
A feed-screw supplies the burner with fuel from an external fuel storage area. The storage area can vary in size,
containing a weeks supply of pellets to a whole years supply.
The pellet store should be so constructed that the feed-screw is at a maximum angle of 45° to the hori zontal floor
plane. The storage area must be enclosed and weather proof in order to protect the pellets from damp and to
shield the rotating feed-screw from unwanted debris.
When constructing large pellet storage areas for bulk pellet supply, your supplier can assist with design and
suggest building materials to achieve best results.
Replenishing pellet to larger storage areas is carried out by pneumatic bulk tankers or in the case of smaller
storage requirements manually from variously sized bags, holding enough for one week or more.
When first starting the burner or if having run out of pellets fuel and the feed-screw is empty; the length of the feed-
screw between the storage area and the burner must be filled with pellet before starting the burner. This is
done by covering the feed-screw inlet, at the entrance to the feed-screw, with pellets and then turning on the
power to the feed-screw motor. Allow the feed-screw to remain in operation (10-15 min) until its whole length is
filled with pellets.
Make it a practice to check the quantity of pellets in the feed-screw inlet after each delivery. This is will ensure a
problem free fuel supply, from the storage area, to the burner.
WARNING.
Do not put fingers or other items in or
near the inlet of the rotating feed-screw!
Store the pellets in a dry place to maintain the pellets original hard consistency. Damp pellets will be soft and shed
particles of saw-dust.
Do not use damp pellets as this may cause operational problems with the equipment.
Install the screw-engine on top of the feed screw and pull it firm. After that, place the feed screw in the intended
pellet store. Make sure it does not slope any steeper than 45
°
. Fill up with pellets enough to cover the feed screw
inlet properly. Connect the screw to a power point and run it until it is completely filled with pellets.
Design and internal structure
The burner consists of the open Burner Housing.
The Burner Housing and Combustion Area are wholly fabricated in heat-resistant stainless steel.
The twin electrical igniters are positioned and fixed inside the Back-plate.
The Burner Housing and Back-plate contain the primary air supply fan, located down-side the burner and the
secondary air supply fan, located up-side the burner.
There is the photocell unit and a circuitry box with connecting terminals.
The Combustion Area comprises of:
The Cassette with an upper section formed as a hood.
The Casette serves as a retainer for the double electric igniters.
The Burner has two internal Screwfeeders with Motors, which feeds the pellets into Combustion Area.
The Burner also includes a separate MPU Microprocessor Unit and a Feed-Screw for transporting pellets from the
storage area to the burner fall-tube.
(Pellets are delivered from the feed-screw outlet through the fall tube spliter and two fall-tubes to the two internal
screwfeeders and onto the combustion area)
Safeguard security equipment includes:
Photocell and back-burn protection and the Water Safety Thermostat with sprinkler. This sprinkler starts to
extinguish the fire, when the temperature is over 95
0
C.
To protect against fuel back-burn a heat detector is positioned alongside the fall-tube. If the heat detector has been
triggered it must be reset manually for the burner to function.
Temperature Gauge PID Regulator (standard) and Lambda Sensor.
The burner is delivered with a temperature gauge PID regulator, it regulates the wanted running temperature of the
burner and a lambda sond, which controll exhaust gas parameters.
The regulator with cooperation with lambda sensor measures and controls adjustments for achieving and holding
on required temperature by activating full modulational oparation of burner, this reduces the number of start ups
and saves fuel. The regulator’s gauge displays the current boiler temperature in the display-panel of the boiler’s
MPU Controll Unit.
Summary of Contents for eurofire XL-GRYM
Page 13: ...13 Drowing Dimensions...
