Wiring Diagrams, Specifications, Service Hints

WIRING DIAGRAMS SPECIFICATIONS REPLACEMENT PARTS SERVICE HINTS TECHNICAL SERVICE

WIRING DIAGRAMS

Note: For proper operation of optional accessories, the wires from the switch to the control must be connected exactly as shown in Figure 42.

A
UT
O
OF
ON	F

Thermopile

Figure 42 - Switch Wiring Diagram

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

			Variable		Fan Switch
		Fan Switch			Fan Switch
						(N.O.)
		Off	1	2 Black
				On	Blue
				On			Red
							Red
110/115
	V.A.C.
		Black
		Green				Blower
		White				Motor

Figure 43 - Blower Wiring Diagram
SPECIFICATIONS
			VI33NRA			VI33PRA
Btu (Variable)			20,000/30,000			20,000/33,000
Type Gas			Natural Gas Only			Propane/LP Only
Ignition			Piezo			Piezo
Pressure Manifold			3.5" W.C.			8.0" W.C.
Inlet Gas Pressure (in. of water)
Maximum			10.5"			14"
Minimum*			5"			11"
* 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 International’s Technical Service Department at 1-866-672-6040. When calling DESA Inter- national, 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 International at 1-866-672-6040 for referral information. When calling DESA International, 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

•for propane/LP unit, propane/LP gas supply may be low

You may feel your gas pressure is low. If so, contact your local gas supplier.

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s 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 International’s technical services web site at www.desatech.com.

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