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SPECIFICATIONS
SVYD18PRA SVYD18NRA
Btu (Variable) 16,000/30,000 16,000/30,000
Type Gas Propane/LP Only Natural Only
Ignition Piezo Piezo
Pressure Manifold 8" W.C. 3.5" W.C.
Inlet Gas Pressure (in. of water)
Maximum 14" 10.5"
Minimum* 11" 5"
Shipping Weight 28 lbs. 28 lbs.
* For input adjustment
WIRING DIAGRAM
Note:
For proper operation of optional accesso-
ries, the wires from the switch to the control must
be connected exactly as shown.
A
U
T
O
O
F
F
O
N
Thermopile
REPLACEMENT PARTS
Note:
Use only original replacement parts. This
will protect your warranty coverage for parts re-
placed 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 De-
partment 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 re-
ferral 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 (propane/LP
only)
You may feel your gas pressure is too low. If so, con-
tact your local propane/LP or natural gas supplier.
TECHNICAL SERVICE
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’ tech-
nical services web site at www.desatech.com.