30
107205
DIRECT-VENT FIREPLACE
For more information, visit www.desatech.com
SERVICE HINTS

When Gas Pressure Is Too Low

• pilot will not stay lit
• burners will have delayed ignition
• fireplace will not produce specified heat

When Gas Quality Is Bad

• pilot will not stay lit
• burners will produce flames and soot
• fireplace will backfire when lit
If you feel your gas pressure is too low or gas
quality is bad, contact your local natural gas
supplier.
TECHNICALSERVICE
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contact DESA International’s Technical
Service Department at 1-800-DESA LOG
(1-800-337-2564).
You can also visit DESA International’s
technical service web site at
www.desatech.com.
REPLACEMENTPAR TS
Figure 54 - Blower Wiring Diagram for Thermostat-Controlled Models
WIRING DIAGRAMS
CAUTION: Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
Note:
Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized retailers of this product.
If they can not supply original replacement
part(s), call DESA International’s Technical
Service Department at 1-800-DESA LOG
(1-800-337-2564).
When calling DESA International, have ready
• your name
• your address
• model and serial numbers of your fireplace
• how fireplace was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the defec-
tive part to the factory.

PARTS NOT UNDER

WARRANTY

Contact authorized retailers of this product.
If they can not supply original replacement
part(s), call DESA International’s Parts
Department at 1-800-972-7879 for referral
information.
When calling DESA International, have ready
• model number of your fireplace
• the replacement part number
Blue
Variable
Fan Switch Fan Switch
(N.O.)
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
2
Black
Figure 55 - Wiring Diagram for Fireplace
Control
Valve
Pilot
Robertshaw
MODEL SP745 IGNITION CONTROL
STEP DOWN
TRANSFORMER
PV GND
PV/MV
TR MV
TH
IGN
EV2
SUPPLY
INCOMING
MAIN GAS
EV1
TO
GAS LINE
BURNER
24V AC
120V AC
120V AC
INCOMING
OR BREAKER)
(FUSE BOX
OFF
ON
(SUPPLIED)
WALL SWITCH
GREEN
BLACK
WHITE
120v, 60Hz, 0.7A
ELECTRICAL RATING:
BLACK
WHITE
GREEN
OPTIONAL
REMOTE
CONTROL
Ignitor
Hearth Pan
Connectors
(Not Supplied)
Field Wire