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116986-01B

16

6.  Press the buttons 

 and   at the same 

time. A short acoustic signal confirms the 

start sequence has begun.

  Further short acoustic signals (0.2 sec., 1 Hz) 

indicate the ignition process until it is com-

pleted and main gas flows. If pilot is already 

lit, motor will turn on (max. flame height) 

while buttons are pressed down. If pilot does 

not light, see 

Troubleshooting

, page 21.

7.  Press   to turn on main burner and in-

crease flame height. Press   to decrease 

flame height and shut off main burner.

8.  Short tapping of either button allows incre-

mental change in flame height.

9.  Press OFF button to switch off main gas 

and pilot gas.

FUNCTIONS OF 

REMOTE CONTROL

Battery

•  After the charged battery has been correctly 

installed, the remote hand set is ready for 

operations.

•  Remove the battery if the remote handset 

will not be used more than one year.

Changing The Code

The control is radio frequency operated. A code 

(chosen from among 4,000 available codes) is 

preset for all valves, but can be changed if re-

quired (15 additional codes available). Change 

DIP switch position. (The DIP switch is located 

inside the hand held control at the top of the 

battery compartment.) Then press the receiver's 

reset button on the bottom of the receiver module 

until you hear a second (longer) signal. When 

pressing the   button on the remote handset 

in the following 20 sec., the receiver learns the 

new code. 

Shut-off Procedure

To save battery power; press   to turn main 

gas to pilot gas. Press OFF button to shut off 

the device including pilot flame. The device can 

be shut off with ON/OFF switch, 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.

Setting The Time

•  After connecting the battery or by simulta-

neously pressing   and   the display will 

start to flash. You are in the set mode.

•  From SET mode press   to set the hour and 

 to set the minute.

•  Wait or press OFF to return to the manual 

mode.

Battery Replacement

Remote handset battery needs to be changed 

when LED is dim. Battery life expectancy is 2 

to 3 years. Replacement is recommended at the 

beginning of heating season. Battery needs to be 

changed when acoustic error message appears 

during ignition (see 

Identifying Error Signals 

from Receiver

 on page 24).

Changing Mode of Operation

•  Press the SET button quickly to change the 

mode of operation in the following order:

 

MAN, 

 TEMP, 

TEMP, TIMER.

•  Manual flame height adjustment (

MAN

 ap-

pears on display): Press   to turn on the fire 

(main burner) or to increase flame height. 

Press   to decrease flame or to go down 

to pilot only. The receiver acknowledges the 

transmission with an acoustic signal.

•  The day time temperature mode 

(

 TEMP

 

ap-

pears on display): The sensor in the transmitter 

measures room temperature. The controller 

compares the room temperature with set tem-

perature and sends a signal to the receiver to 

turn the gas valve motor up or down, to adjust 

the flame height accordingly.

•  The  nighttime  setback  temperature  ( 

TEMP

 appears on display): The sensor in the 

transmitter measures the temperature and 

adjusts it according to the nighttime setback 

temperature. There is a bigger temperature 

differential during this cycle.

oPeRaTING HeaTeR

Continued

SET

OFF

STAND

BY

Figure 17 - Control Panel for Hand-Held Remote

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...

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