Desa VYM27NR - Manual (Page 21)

www.desatech.com 108382-01G 21
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot as-
sembly. There is a small pilot air inlet hole about
two inches from where the pilot flame comes out of
the pilot assembly (see Figure 33, page 20). With
the unit off, lightly blow air through the air inlet
hole. You may blow through a drinking straw if
compressed air is not available.
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 15, to properly replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
WIRING DIAGRAM
Note: For proper operation of optional accessories,
the wires from the switch to the control must be
connected exactly as shown.
CLEANING AND
MAINTENANCE
Continued
AUTO
OFF
ON
Thermopile
SPECIFICATIONS
Natural Gas
• Rating (Variable): 20,000/39,000 Btu/Hr
• Gas Type: Natural Gas
• Ignition: Piezo
• Manifold Pressure: 3.5" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 10.5", Minimum* - 5"
• Shipping Weight: 32 lbs.
Propane/LP
• Rating (Variable): 20,000/39,000 Btu/Hr
• Gas Type: Propane/LP
• Ignition: Piezo
• Manifold Pressure: 8.0" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 14", Minimum* - 11"
• Shipping Weight: 32 lbs.
* For input adjustment
REPLACEMENT PARTS
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
pARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating Products’ Technical Service
Department at 1-866-672-6040. When calling
DESA Heating Products, have ready
• your name and address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to the
factory.
pARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
can’t supply original replacement part(s), call DESA
Heating Products at 1-866-672-6040 for referral
information. When calling DESA Heating Products,
have ready
• model number of your heater
• the replacement part number
SERVICE HINTS
When Gas pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If
so, contact your local natural or propane/LP gas
supplier.
TECHNICAL SERVICES
You may have further questions about installation,
operation, or troubleshooting. If so, contact DESA
Heating Products’ Technical Service Department
at 1-866-672-6040. When calling please have your
model and serial numbers of your heater ready.
You can also visit DESA Heating Products’ techni-
cal services web site at
www.desatech.com
.