Desa EFS33NRA Manuel D’Utilisation

www.desatech.com

107172-01K

CLEANING AND

MAINTENANCE

Continued

2. Inspect burner, pilot and primary air inlet holes

on injector holder for dust and dirt (see Figure

42).

3. Blow air through the ports/slots and holes in

the burner.

4. Check the injector holder located at the end

of the burner tube again. Remove any large

particles of dust, dirt, lint or pet hair with a

soft cloth or vacuum cleaner nozzle.

5. Blow air into the primary air holes on the

injector holder.

6. In case any large clumps of dust have now been

pushed into the burner repeat steps 3 and 4.

Clean the pilot assembly also. A yellow tip on the

pilot ﬂame indicates dust and dirt in the pilot as-

sembly. There is a small pilot air inlet hole about

two inches from where the pilot ﬂame comes out

of the pilot assembly (see Figure 43). With the unit

off, lightly blow air through the air inlet hole. You

may blow through a drinking straw if compressed

air is not available.

Figure 42 - Injector Holder On Outlet

Burner Tube

Burner
Tube

Injector
Holder

Primary Air
Inlet Holes

Ports/
Slots

Figure 43 - Pilot Inlet Air Hole

Burner
Tube

Pilot
Assembly

Pilot Air
Inlet Hole

Ports/Slots

LOGS

• If you remove logs for cleaning, refer to Install-

ing Logs

, page 16, to properly replace logs.

• Replace log(s) if broken or chipped (dime-sized

or larger).

WIRING DIAGRAM

Note:

For proper operation of optional accessories,

the wires from the switch to the control must be

connected exactly as shown.

AUTO

OFF

Thermopile

SPECIFICATIONS

MODELS EFS33NR, EFS33NRA,
VSGF33NR AND VSGF33NRA

Btu (Variable)

20,000/33,000

Type Gas

Natural Gas Only

Ignition

Piezo

Pressure Manifold

3.5" W.C.

Inlet Gas Pressure (in. of water)

Maximum

10.5"

Minimum*

Shipping Weight

122 lbs.

* For input adjustment

MODELS EFS33PR, EFS33PRA,
VSGF33PR AND VSGF33PRA