Specifications - Desa HDL18NR Owner's Operation And Installation Manual

1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt
(see Figure 32).
3. Blow air through ports/slots and holes in
burner.
4. Check injector holder located at end of
burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with
a soft cloth or vacuum cleaner nozzle.
5. Blow air into primary air holes on injector
holder.
6. In case any large clumps of dust have now
been pushed into burner, repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on pilot
flame indicates dust and dirt in pilot assembly.
There is a small pilot air inlet hole about 2"
from where pilot flame comes out of pilot as-
sembly (see Figure 33). With unit off, lightly
blow air through air inlet hole. You may blow
through a drinking straw if compressed air is
not available.
Injector Holder (May Be Brass or
Aluminum Depending on Model)
Burner Tube
Primary Air Inlet Holes
(Shape of Holes May
Vary by Model)
Figure 32 - Injector Holder On Outlet
Burner Tube
HDL18PR, HDL24PR, VDB18PR,
VDB24pR
• Rating (Variable): 20,000/36,000 Btu/Hr
• Type Gas: Propane/LP
• Ignition: Piezo
• Pressure Manifold: 10.0" W.C.
• Inlet Gas Pressure (in. of water):
Maximum 14" W.C., Minimum* 11" W.C.
• Shipping Weight:
* For input adjustment
122260-01E
cLEANING AND MAINTENANcE

SPEcIFIcATIONS

27 lbs.
www.desatech.com
Continued
Figure 33 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 17, to properly replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
BURNER pRIMARY AIR HOLES
Air is drawn into burner through the 8 holes
in brass fitting at entrance to burner. These
holes may become blocked with dust or lint.
Periodically inspect these holes for any block-
age and clean as necessary. Blocked air holes
will create soot.
MAIN BURNER
Periodically inspect all burner flame holes
with heater running. All slotted burner flame
holes should be open yellow flame present.
All round burner flame holes should be open
with a small blue flame present. Some burner
flame holes may become blocked by debris
or rust, with no flame present. If so, turn
off heater and let cool. Remove blockage,
blocked burner flame holes will create soot.
VENTING
Once every year a qualified agency or certified
chimney sweep should examine and clean the
venting system of the fireplace.
HDL18NR, HDL24NR, VDB18NR,
VDB24NR
• Rating (Variable): 23,000/37,000 Btu/Hr
• Type Gas : Natural Gas
• Ignition: Piezo
• Pressure Manifold: 4.5" W.C.
• Inlet Gas Pressure (in. of water):
Maximum 10.5" W.C., Minimum* 5" W.C.
• Shipping Weight:
* For input adjustment
Pilot
Assembly
Pilot Air
Inlet Hole
29 lbs.
23