background image

www.desatech.com

116986-01B

8

INsTallaTIoN

NOTICE: This heater is intended 

for  use  as  supplemental  heat. 

Use this heater along with your 

primary heating system. Do not 

install  this  heater  as  your  pri

-

mary heat source. If you have a 

central heating system, you may 

run system’s circulating blower 

while using heater. This will help 

circulate the heat throughout the 

house. In the event of a power 

outage, you can use this heater 

as your primary heat source.

 WARNING: A  qualified  ser

-

vice person must install heater. 

Follow all local codes.

 WARNING: Before installing in 

a solid fuel burning fireplace, the 

chimney flue and firebox must be 

cleaned of soot, creosote, ashes 

and loose paint by a qualified chim

-

ney  cleaner.  Creosote  will  ignite 

if highly heated. A dirty chimney 

flue may create and distribute soot 

within the house. Inspect chimney 

and  firebox  flue  for  damage.  If 

damaged, repair flue and firebox 

before operating heater.

  WARNING:  Seal  any  fresh 

air vents or ash clean-out doors 

located on floor or wall of fire

-

place. If not, drafting may cause 

pilot  outage  or  sooting.  Use  a 

heat-resistant  sealant.  Do  not 

seal chimney flue damper. 

 WARNING: Never install the 

heater

•  in a bedroom or bathroom 

•  in a recreational vehicle

•  where curtains, furniture, cloth-

ing or other flammable objects 

are less than 42" from the front, 

top or sides of the heater

•  in high traffic areas

•  in windy or drafty areas

 CAUTION: This heater cre-

ates  warm  air  currents.  These 

currents move heat to wall sur-

faces  next  to  heater.  Installing 

heater next to vinyl or cloth wall 

coverings  or  operating  heater 

where impurities (such as, but 

not limited to, tobacco smoke, 

aromatic candles, cleaning flu

-

ids, oil or kerosene lamps, etc.) in 

the air exist, may discolor walls 

or cause odors.

  WARNING:  Antenna  and 

ignition cable must maintain a 

spacing of 3/4". Failure to keep 

them  separated  will  result  in 

damage to the receiver. See 

Wir-

ing Diagram

 on page 24.

IMPORTANT:

 Vent-free heaters add moisture to 

the air. Although this is beneficial, installing heater 

in rooms without enough ventilation air may cause 

mildew to form from too much moisture. See 

Air 

for Combustion and Ventilation

, page 5.

CHECK GAS TYPE

Use the correct gas type (natural or propane/LP) 

for your unit. If your gas supply is not correct, do 

not install heater. Call dealer where you bought 

heater for proper type heater. 

  WARNING:  This  appliance 

is equipped for (natural or pro

-

pane/LP) gas. Field conversion 

is not permitted.

Summary of Contents for Design Dynamics VF-18N-MHD

Page 1: ...pliance 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 your gas...

Page 2: ...air oxygen from the room in which it is installed Provi sions for adequate combustion and ventilation air must be provided Refer to Air for Combustion and Ventilation section on page 5 of this manual...

Page 3: ...a to cause cancer or birth defects or other reproductive harm IMPORTANT Read this owner s manualcarefullyandcompletely before trying to assemble operate or service this heater Improper use of this hea...

Page 4: ...eaterneedsfresh outsideairventilationto runproperly Thisheaterhasanoxygendepletion sensing ODS pilot light safety system The ODS shuts down the heater if not enough fresh air is available See Air for...

Page 5: ...ystem requires no matches or other source to light log set Air For Combustion and Ventilation WARNING This heater shall not be installed in a confined space or unusually tight con struction unless pro...

Page 6: ...grills between the rooms 1 Determine the volume of the space length x width x height Length x Width x Height __________cu ft volume of space Example Space size 20 ft length x 16 ft width x 8 ft ceilin...

Page 7: ...ption 3 Figure 2 Follow the National Fuel Gas Code ANSI Z223 1 NFPA 54 Section 5 3 Air for Combustion and Ventilation for required size of ventilation grills or ducts Figure 2 Ventilation Air from Ins...

Page 8: ...WARNING Never install the heater in a bedroom or bathroom in a recreational vehicle where curtains furniture cloth ing or other flammable objects are less than 42 from the front top or sides of the he...

Page 9: ...Size Height Depth Front Width Rear Width 18 20 14 35 22 1 2 24 20 14 35 22 1 2 MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS Log Size 18 or 24 Side Wall 16 Ceiling 42 Floor 5 Measured at 14 dep...

Page 10: ...Minimum Mantel Clearances When Using Hood Minimum Noncombustible Material 8 Min 12 15 18 All minimum distances are in inches 20 2 1 2 6 8 10 12 Distances to Underside of Mantel Hood GA6050 GA6052 or G...

Page 11: ...ht remove the mantel Floor Clearances A If installing appliance on the floor level you must maintain the minimum distance of 14 to combustibles see Figure 8 B If combustible materials are less than 14...

Page 12: ...ction Purchase the optional CSA design certified equipment shutoff valve from your dealer See Accessories page 25 For propane LP units the installer must supply an external regulator The external regu...

Page 13: ...Purchase the optional CSA design certified equipment shutoff valve from your dealer See Accessories page 25 Minimum inlet pressure for purpose of input adjustment Figure 12 Gas Connection 3 Minimum C...

Page 14: ...e LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air 3 Check all joints from gas meter to equipment shutoff valvefornatural gas or propane LPsup ply...

Page 15: ...ARNING If fireplace has glass doors never operate this heater with glass doors closed If you op erateheaterwithdoorsclosed heat buildup inside fireplace willcauseglasstoburst Make suretherearenoobstru...

Page 16: ...off with ON OFFswitch thus disabling the remote hand set Setting The Display C 24h and F 12h Press and hold OFF and until display changes from F and 12 hour clock to C and 24 hour clock or vice versa...

Page 17: ...gas Shutting Off Burner Only pilot stays lit Press to decrease the flame height and shut off main burner MANUAL LIGHTING Procedure WARNING Manual lighting mustbeperformedbyaqualified service person Th...

Page 18: ...r knob to adjust flame Knob has a slipping clutch that allows manual flame height adjustment to turn gas off to appliance Shutting Off Heater Press OFF button on remote control to switch off main gas...

Page 19: ...to keep the primary air opening s of theburner s cleanmayresultin sooting and property damage Burner Injector Holder Air Inlet Hole The primary air inlet holes allow the proper amount of air to mix w...

Page 20: ...he burner Figure 25 Injector Holder on Front Burner Tube Burner Tube Primary Air Inlet Opening Injector Holder Injector Figure 24 Removing Front Log to Clean Front Burner Main Log Assembly Front Log A...

Page 21: ...ssure is too low 2 Burner orifice s clogged OBSERVED PROBLEM When and arepressedat the same time there is no spark at ODS pilot When and are pressed there is spark at ODS pilot but no ignition Burner...

Page 22: ...and let warm up for a minute 2 Operate burner until air is removed from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum installation clearances see page 9 4 Cl...

Page 23: ...artially clogged 4 Thermostat on remote is satisfied 1 Gas leak See Warning statement at top of page 2 Control valve or gas control defective 1 Foreign matter between con trol valve and burner 2 Gas l...

Page 24: ...F Switch Soldered Cable Thermocurrent Cable 1 Motor Knob MAN Knob troubleshooting Continued POSSIBLE CAUSE Battery nearly down When signal appears the first time ap proximately 10 ignitions left Cable...

Page 25: ...ct authorized dealers of this product If they can t supply original replacement part s call DESA s Technical Service Department at 1 866 672 6040 When calling DESA have ready your name your address mo...

Page 26: ...llustrated Parts Breakdown Models VF 18N MHD VF 18P MHD VF 24N MHD and VF 24P MHD 1 2 3 4 5 25 22 7 8 18 9 6 10 11 26 34 23 12 21 20 29 28 29 28 27 24 27 24 22 13 19 14 32 30 15 15 15 15 15 15 31 15 1...

Page 27: ...01 117004 01 117004 01 Pilot Shield 1 20 099918 03 099918 02 099918 03 099918 02 Burner Regulator 1 21 116957 01 111803 03 116957 01 Air Shutter 1 22 111824 01 111824 01 111824 01 111824 01 Nut Sleeve...

Page 28: ...d 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 normal wear a...

Reviews: