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114924-01D

10

INSTALLATION

Continued 

Figure 11 - Placement of Embers

OPERATING APPLIANCE

FOR YOUR SAFETY 

READ BEFORE LIGHTING

 WARNING: Keep flue open 

when operating unit.

 WARNING: If you do not fol-

low  these  instructions  exactly, 

a  fire  or  explosion  may  result 

causing property damage, per-

sonal injury or loss of life.

A.  This appliance has a pilot which must be 

lighted with a piezo ignitor. When lightning 

the pilot, follow these instructions exactly.

B.  BEFORE LIGHTING smell all around the 

appliance area for gas. Be sure to smell next 

to the floor because some gas is heavier than 

air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not 

use any phone in your building.

• Immediately call your gas supplier from 

a  neighbor’s  phone.  Follow  the  gas 

supplier’s instructions.

• If you cannot reach your gas supplier, call 

the fire department.

C.  Use only your hand to push in or turn gas 

control knob. Never use tools. If the knob 

will not push in or turn by hand, do not try 

to repair it, call a qualified technician. Force 

or attempted repair may result in a fire.

D.  Do not use this appliance if any part has been 

under water. Immediately call a qualified 

service technician to inspect the appliance and 

to replace any part of the control system and 

any gas control which has been under water.

LIGHTING 

 INSTRUCTIONS

1.  STOP! Read the safety information, col-

umn 1.

2.  Make sure switch is in OFF position. 

3.  Be sure gas line shut-off valve is OPEN.

4.  Press in and turn control knob clockwise  

 to the OFF position (see Figure 12).

 

Note:

 Knob cannot be turned from PILOT 

to OFF unless knob is pushed in slightly. DO 

NOT FORCE.

5.  Wait five (5) minutes to clear out any gas. 

If you then smell gas, STOP! Follow "B" in 

the safety information in column 1. If you 

don't smell gas, go on the next step.

6.  Press in and turn control knob counter-

clockwise 

 to the PILOT position. 

Press in control knob for five (5) seconds 

(see Figure 12). 

7.  With control knob pressed in, press and release 

ignitor button. This will light pilot. If needed, 

keep pressing ignitor button until pilot lights.

Note:

 If pilot does not stay lit, contact a quali-

fied service person or gas supplier for repairs. 

8.  Keep control knob pressed in for 30 seconds 

after lighting pilot. After 30 seconds, release 

control knob.

• If control knob does not pop out when 

released, contact a qualified service person 

or gas supplier for repairs.

 

Note:

 If pilot goes out, repeat steps 4 

through 8.

9.  Slightly push in and turn control knob coun-

terclockwise 

 to the ON position.

10.  Wait one minute and move switch to the 

ON position to light burner. 

Note: 

AUTO is 

only functional when using  optional remote 

control accessory.

11.  Set flame adjustment knob to any level 

between HI and LO.

Figure 12 - Setting Control Knobs

Piezo Ignitor

Control 
Knob

Flame Adjustment Knob

3.  When unit is lit, check flames for random appear

-

ance and ember bed glowing red-orange in color 

(see 

Burner Flame Pattern

, page 12). If this is 

not happening, either add, remove or reposition 

loose embers. 

IMPORTANT:

 Turn unit off and 

let cool before repositioning loose embers.

Summary of Contents for MVO18VNA

Page 1: ...t any appliance Do not touch any electrical switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach...

Page 2: ...Z233 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation This appliance may be installed in an aftermarket per manently located manufactured mobile home where not prohibited by local codes This a...

Page 3: ...nt even though no odor exists Make certain you read and understand all warnings Keep this manual for reference It is your guide to safe and proper operation of this log set WARNING Do not place log sc...

Page 4: ...eans screens shall have openings for introduction of combustion air 8 If fireplace has glass doors never operate with glass doors closed If you operate heater with doors closed heat buildup inside fir...

Page 5: ...used with vented decorative appliances Installation WARNING A qualified ser vice person must install heater Follow all local codes WARNING Before installing in a solid fuel burning fireplace the chim...

Page 6: ...le material and connected to a working flue The fireplace chimney must have a permanent vent opening to outside with minimum openings shown in Figure 3 Figure 2 Technical Information Chart Figure 3 Si...

Page 7: ...ollow all local codes WARNING This appliance requiresa3 8 NPT NationalPipe Thread inlet connection to the control valve CAUTION Never connect propane LP unit directly to the propane LP supply This uni...

Page 8: ...installed wrong heater may not run properly CAUTION Avoid damage to gas control Hold gas control with wrench when connecting it to gas piping and or fittings Figure 7 Gas Connection Purchasetheoptiona...

Page 9: ...Propane LP Gas Only Figure 10 Checking Gas Joints Natural Gas Only Equipment Shutoff Valve Gas Meter Control Valve Location Pressure Testing Appliance Gas Connections 1 Open equipment shutoff valve s...

Page 10: ...tch is in OFF position 3 Be sure gas line shut off valve is OPEN 4 Press in and turn control knob clockwise to the OFFposition see Figure 12 Note Knob cannot be turned from PILOT to OFFunless knob is...

Page 11: ...Setting the Selector Switch Control Knob and Flame Adjustment Knob for Remote Operation Selector Switch in REMOTE Position REMOTE OFF ON Piezo Ignitor Control Knob Flame Adjustment Knob Figure 14 On...

Page 12: ...Pattern Yellow Flames with Orange Streaks Cleaning and Maintenance WARNING Turn off the ap pliance and allow to cool before cleaning CAUTION You must keep control areas burners and cir culating air pa...

Page 13: ...gas lines when in stalled 5 Depleted gas supply pro pane LP only 6 ODS pilot is clogged 7 External gas regulator setting is incorrect When ignitor button is pressed there is no spark at ODS pilot When...

Page 14: ...n burner s see Cleaning and Maintenance page 12 1 Clean burner see Cleaning and Maintenance page 12 or replace burner orifice 2 Replace damaged burner 3 Replace gas regulator 4 Correct external gas re...

Page 15: ...oved from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum installation clearances see page 6 4 Clean burners see Cleaning and Maintenance page 12 or replace bur...

Page 16: ...ding while heating or contracting while cooling 1 Appliance burning vapors from paint hair spray glues cleaners chemicals new carpet etc See IMPORTANT statement above 2 Low fuel supply propane LP only...

Page 17: ...will not stay lit burners will have delayed ignition Propane LPunits only propane LPgas supply may be low You may feel your gas pressure is too low If so contact your local propane LP or natural gas s...

Page 18: ...www desatech com 114924 01D 18 Illustrated Parts Breakdown Models MVO24VNA MVO24VPA MVO18VNA and MVO18VPA 1 2 3 4 5 6 17 16 15 7 8 9 10 11 12 14 13...

Page 19: ...01 Pilot Assembly 1 11 111828 01 Brass Fitting 1 111818 01 Brass Fitting 1 12 114930 01 Pilot Bracket 1 114930 02 Pilot Bracket 13 26205 Gas Orifice 1 23109 Gas Orifice 1 14 114936 02 Venturi 1 11493...

Page 20: ...installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of norm...

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