Desa TPNPA-A Troubleshooting, Wiring Diagrams, Service Hints, Technical Service, Continued

TROUBLESHOOTING

Continued

	PROBLEM	POSSIBLE CAUSE		REMEDY
	No gas to main burner when wall	1.	Wall switch wires defec-	1.	Check electrical connections
switch and valve are set to ON			tive		and replace wall switch
position
Frequent main burner outage		1.	Burner flame is too low	1.	Clean and adjust main burner
		2.	Igniter is misaligned causing	2.	Adjust ignitor location for
			safety burner to "drop out"		maximum flame impingement
		3.	Vent may be blocked or	3.	on sensor
					Have vent inspected for block-
			restricted		age or damage

Wiring Diagrams

IGNITER ASSEMBLY

IGNITION CONTROL

MODULE

G						P.
N	V2	L1	IND	TS	S1
D						SW	V1

ON

OFF

24V AC

STEP DOWN

TRANSFORMER

120V AC

GAS VALVE

		T
		DO NOT
O	I	CONNECT
L	H
		CONTROL
		VALVE TO
		120 VAC

WALL SWITCH	CONNECTORS
(SUPPLIED)	(NOT SUPPLIED)

OPTIONAL		FIELD WIRE
REMOTE
CONTROL J. BOX RECEPTACLE	BLK
BLK		INCOMING
		120V AC
WHT	WHT
		(FUSE BOX
GRN	GRN	OR
		BREAKER)
	GND

Figure 63 - Electronic Wiring Diagram

CONNECTORS (NOT SUPPLIED)

FIELD WIRE

J. BOX RECEPTACLE BLK

	Variable
Blower	Speed
Electrical Rating:	Control

120v, 60Hz, 0.7A

BLK		INCOMING
		120V AC
WHT	WHT
		(FUSE BOX
GRN	GRN	OR
		BREAKER)
	GND

Figure 64 - Optional Blower Wiring Diagram

Service Hints

When Gas Pressure Is Too Low

• pilot will not stay lit

• burner will have delayed ignition

• fireplace 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 gas supplier.

Technical Service

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA’s Technical Service Department at 1-866-672-6040. When calling, please have your model and serial numbers ready.

You can also visit DESA’s Technical Services web site at www.desatech.com.

Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty.

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