Desa (V)VC42NE Series - Manual (Page 18)

18
www.desatech.com 116237-01D
Figure 29 - Blower Wiring Diagram for Thermostat-Controlled Models
Blower 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.
INSTALLING GAS PIPING TO FIREPLACE
LOCATION
WARNING: A qualified service person must con-
nect fireplace to gas supply. Follow all local codes.
CAUTION: For propane/LP units, never connect
fireplace directly to the propane/LP supply. This
heater requires an external regulator (not supplied).
Install the external regulator between the fireplace
and propane/LP supply.
Installation Items Needed
Before installing fireplace, make sure you have the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• approved flexible gas line with gas connector (if allowed by local
codes)
* A CSA design-certified equipment shutoff valve with 1/8" NPT tap
is an acceptable alternative to test gauge connection. Purchase the
CSA design-certified equipment shutoff valve from your retailer.
For propane/LP connection only, the installer must supply an external
regulator. The external regulator will reduce incoming gas pressure.
You must reduce incoming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pressure, fireplace
regulator damage could occur. Install external regulator with the
vent pointing down as shown in Figure 31, page 19. Pointing the
vent down protects it from freezing rain or sleet.
Figure 30 - External Regulator with Vent Pointing Down
(Propane/LP Only)
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
5. Mount the speed control box against the mounting plate provided
in the lower fireplace cavity by placing the plastic control shaft
forward through the round hole (see Figure 26, page 17).
6. While supporting speed control, secure control shaft with lock
nut by pushing and turning lock nut with pliers clockwise until
it is tight against mounting plate. Place control knob provided
on shaft (see Figure 26, page 17).
7. Check to make sure that the power cord is completely clear of the
blower wheel and that there are no other foreign objects in blower
wheel. Also double check all wire leads and make sure wire routing
is not pinched or in a precarious position. Correct accordingly.
8. Turn on power to duplex outlet if previously turned off per the
warning in column 2, page 16.
9. Plug in blower power cord to duplex outlet.
10. The blower will only run when the speed control knob is in the
ON position and the thermal switch senses temperature after the
fireplace begins to heat up. The blower speed can be adjusted by
rotating the control knob. To turn off, turn knob fully counterclock-
wise until it clicks off. If the blower is ON and has been running
with the fireplace operating, the blower will continue to run for a
short time after the fireplace has been turned off. As the thermal
switch cools down, the blower shuts down automatically.
11. Peel off the backing paper and stick the supplied wiring diagram
decal on the firebox bottom approximately 12" in front of the
blower (see Figure 27, page 17).
FIREPLACE INSTALLATION
Continued
FIREPLACE INSTALLATION
Installing Optional Blower Accessory (Cont.)
Installing Gas Piping to Fireplace Location
Blue
Variable
Fan Switch Fan Switch
(N.O.)
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
2
Black