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107886-01J

11

4.  If  installing  bottom  mounting  screws  into 

hollow  or  solid  wall,  install  wall  anchors. 

Follow steps 1 through 4 under 

Attaching To 

Wall Anchor Method

, page 10

 

If installing bottom mounting screw into wall 

stud, drill holes at marked locations using 

9/64" drill bit.

5.  Replace heater onto mounting bracket.
6.  Place spacers between bottom mounting holes 

and wall anchor or drilled hole.

7.  Hold spacer in place with one hand. With other 

hand, insert mounting screw through bottom 

mounting hole and spacer. Place tip of screw 

in opening of wall anchor or drilled hole.

8.  Tighten  both  screws  until  heater  is  firmly 

secured to wall. Do not over tighten.

 

Note:

 Do not replace front panel at this time. 

Replace front panel after making gas connec-

tions and checking for leaks (see pages 11 

through 13).

MOUNTING HEATER TO FLOOR

Mounting Base Feet to Heater

1.  Lay heater cabinet on its back on a table with 

the heater bottom overhanging the table edge. 

2.  Align holes in base foot with mounting holes 

on bottom of cabinet (see Figure 13). 

3.  Secure base foot to heater using sheet metal 

screws. 

4.  Repeat for other side.

INSTALLATION

Continued

Figure 13 - Installing Base Feet

Sheet Metal Screw

Base Foot

Wood 
Screw

Mounting Base Feet to Floor (Where 
required by local code)

1.  Remove  front  cover  (see 

Removing  Front 

Panel of Heater,

 page 9).

2.  Position heater with base feet in desired loca-

tion. Mark holes for drilling. Remove heater 

with base.

3.  For carpeted floors, make a small cut with a 

sharp knife at marked locations prior to drill-

ing. If mounting base to a wood floor, drill 1/8 

inch diameter hole, 3/4 inch deep. (Do not use 

anchors in wood floors). 

 

If  mounting  base  to  a  concrete  floor,  drill 

with 1/4 inch diameter concrete drill bit, 1

3

/

8

 

inches into floor. Insert anchors completely 

into holes. 

4.  Reposition heater with base feet over holes. 

Secure base to floor with wood screws. See 

Figure 13.

CONNECTING TO GAS SUPPLY

  WARNING:  This  appliance 

requires  a  3/8"  NPT  (National 

Pipe Thread) inlet connection to 

the pressure regulator.

 WARNING: A qualified service 

person must connect heater to gas 

supply. Follow all local codes.

  WARNING:  For  natural  gas, 

never connect heater to private (non-

utility) gas wells. This gas is com-

monly known as wellhead gas.

IMPORTANT:

 For natural gas, check gas line 

pressure before connecting heater to gas line. Gas 

line pressure must be no greater than 10.5 inches of 

water. If gas line pressure is higher, heater regula-

tor damage could occur.

  CAUTION:  For  propane/LP 

gas, never connect heater directly 

to  the  propane/LP  supply.  This 

heater requires an external regu-

lator  (not  supplied).  Install  the 

external  regulator  between  the 

heater and propane/LP supply.

For propane/LP gas, 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 pres-

sure, heater regulator damage could occur. Install 

the external regulator with the vent pointing down 

as shown in Figure 14, page 12. Pointing the vent 

down protects it from freezing rain or sleet.

Summary of Contents for VP20BT

Page 1: ...other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s ph...

Page 2: ...ng plate This appliance is not convert ible for use with other gases Aftermarket Completion of sale not for purpose of resale from the manufacturer TABLE OF CONTENTS Safety Information 3 Local Codes 4...

Page 3: ...o high temperatures the appliance should be located out oftraf candawayfromfurniture and draperies Do not place clothing or other ammable material on or near the appliance Never place any objects on t...

Page 4: ...o cal codes In the absence of local codes use the latest edition of National Fuel Gas Code ANSI Z223 1 NFPA 54 Available from American National Standards Institute Inc 1430 Broadway New York NY 10018...

Page 5: ...e air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unusual...

Page 6: ...rect vent draws combustion air from the outdoors and vents to the outdoors Example Gas water heater ______________ Btu Hr Vent free heater _____________ Btu Hr Total _____________ Btu Hr 40 000 20 00...

Page 7: ...t air into attic if attic has a thermostat controlled power vent Heated air entering the attic will activate the power vent Figure 3 Ventilation Air from Outdoors Figure 2 Ventilation Air from Inside...

Page 8: ...es of the heater as a replace insert in high traf c 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 h...

Page 9: ...Attaching to Wall Stud This method provides the strongest hold Insert mounting screws through mounting bracket and into wall studs Attaching to WallAnchor This method allows you to attach mounting bra...

Page 10: ...r ush to wall 4 For thin walls 1 2 or less insert red key into wall anchor Push red key to pop open anchor wings see Figure 10 IMPORTANT Do not hammer key For thick walls over 1 2 thick or solid walls...

Page 11: ...3 For carpeted oors make a small cut with a sharp knife at marked locations prior to drill ing If mounting base to a wood oor drill 1 8 inch diameter hole 3 4 inch deep Do not use anchors in wood oor...

Page 12: ...in Figure 15 Locate sediment trap where it is within reach for cleaning Locate sediment trap where trapped matter is not likely to freeze A sediment trap traps moisture and contaminants This keeps the...

Page 13: ...by either opening propane LP supply tank valve for propane 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 for n...

Page 14: ...de Pilot Burner Thermocouple OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING If you do not fol low these instructions exactly a re or explosion may result causing property damage per son...

Page 15: ...lbetween1 and 5 Selecting the 5 setting will cause the burner to remain fully on without modulating down in most cases Note The thermostat sensing bulb measures the temperature of air near the heater...

Page 16: ...e of dust and dirt To clean these parts we recommend using compressed air no greater than 30 PSI Your local computer store hardware store or home center may carry compressed air in a can You can use a...

Page 17: ...25 x 7 24 25 x 25 75 x 7 Carton 26 25 x 21 25 x 9 26 25 x 29 x 9 Weight pounds Heater 20 28 Shipping 25 33 SERVICE HINTS When Gas Pressure Is Too Low pilot will not stay lit burner will have delayed i...

Page 18: ...on 4 Air in gas lines when in stalled 5 Depleted gas supply propane LP gas only 6 ODS pilot is clogged 7 Gas regulator setting is not correct OBSERVED PROBLEM When ignitor button is pressed there is n...

Page 19: ...Burner back ring during combustion Yellow ame during burner combustion Slightsmokeorodorduringinitial operation REMEDY 1 Press in control knob fully 2 AfterODS pilotlights keepcon trol knob pressed in...

Page 20: ...ly propane LP gas only 3 Gas leak See Warning statement above 1 Not enough fresh air is available 2 Low line pressure 3 ODS pilot is partially clogged OBSERVED PROBLEM Heaterproducesawhistlingnoise wh...

Page 21: ...0 When calling DESA Heating Products have ready your name your address model and serial numbers of your heater how heater was malfunctioning type of gas used propane LP or natural gas purchase date Us...

Page 22: ...www desatech com 107886 01J 22 ILLUSTRATED PARTS BREAKDOWN MODELS VN20BT VP20BT VN30BT VP30BT 2 3 5 6 8 9 10 10 11 12 13 14 16 18 19 4 7 1 15 17 20...

Page 23: ...01 Nut M5 2 11 110803 01 110803 02 110803 01 110803 02 ODS Pilot Assembly 1 110186 01 110186 01 110186 01 110186 01 Thermocouple Kit 1 12 103446 01 103446 01 103447 01 103447 01 Burner 1 13 099387 03...

Page 24: ...intenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective heater will be the responsibility of...

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