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12

201835

DIRECT-VENT NATURAL GAS HEATER

DYNAVENT

®

 WARNING: Furnace burner,

combustion chamber, and ex-
haust port are very hot during
operation. Keep children and
adults away from hot surfaces to
avoid burns and clothing igni-
tion. Carefully supervise young
children when they are in the
same room as furnace. Furnace
will remain hot for a time after
shutdown. Let surface cool be-
fore touching.

OPERATING
FURNACE

 WARNING: Do not operate

furnace with front cover removed.
Unsafe operation could result.

 CAUTION: Do not block cir-

culating air openings in the lou-
ver of the front cover. This is
necessary for furnace to operate
properly.

FOR YOUR SAFETY

READ BEFORE

LIGHTING

 WARNING: If you do not fol-

low these instructions exactly, a
fire or explosion may result caus-
ing property damage, personal
injury, or loss of life.

A. This appliance does not have a pilot.

It is equipped with an ignition device
which automatically lights the
burner. Do not try to light the burner
by hand.

NOTICE: If operating furnace for
the first time, a slight odor will
occur. This odor will go away
after a few hours of operation.

OPERATING

INSTRUCTIONS

 WARNING: Always follow

lighting instructions. Never at-
tempt to light burner with a match
or butane torch.

1.

STOP! Read the safety information,
column 1.

2.

Set the thermostat to lowest setting.

3.

Turn off all electric power to the
furnace.

4.

Turn equipment shutoff valve clock-
wise 

 to OFF position (see

Figure 18).

5.

Wait five (5) minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation, column 1. If you don’t
smell gas, go to next step.

6.

Turn equipment shutoff valve coun-
terclockwise 

 to ON position

(see Figure 18).

7.

This furnace is equipped with an ig-
nition device which automatically
lights the burner. Do not try to light
the burner by hand.

8.

Plug in furnace.

9.

Set thermostat to desired setting. If
thermostat is set above room tem-
perature, the blower will come on.

10. Allow approximately 45 seconds for

ignition to occur. When ignition oc-
curs, the glo-bar will stay on for a
short period of time. The flame sens-
ing probe will sense the burner flame
and shut off glo-bar.

If ignition does not occur within 22
seconds, the ignition control will at-
tempt to light burner three times.
This will take about two minutes. If
ignition does not occur, the ignition
control will lock out the glo-bar and
valve circuit. Air in the gas line or a
short gas interruption will prevent
furnace from igniting. If this hap-
pens, turn thermostat off and wait 5
minutes. Turn the thermostat back
on. The furnace will try to ignite
again.

11. If the furnace still does not ignite, fol-

low instructions To Turn Off Gas to
Furnace
, page 13. Call a qualified
service person. Do not attempt to re-
start furnace.

Figure 18 - Equipment Shutoff Valve

O

POSI

PO

Off Position

On Position

B. BEFORE OPERATING 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 sup-

plier, call the fire department.

C. Use only your hand to turn the

handle on the equipment shutoff
valve. Never use tools. If the handle
will not turn by hand, don’t try to
repair it. Call a qualified service tech-
nician. Force or attempted repair
may result in a fire or explosion.

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 un-
der water.

Summary of Contents for DynaVent DNV25NB

Page 1: ...operin stallation adjustment alteration service or maintenance can cause injury or property dam age Refertothismanual for correct installation and operational proce dures Forassistanceor additional in...

Page 2: ...gas leak However the odor added to natural gas can fade Natural gasmaybepresenteventhoughnoodorexists Makecertainyoureadandunderstandallwarn ings Keep this manual for reference It is your guidetosafea...

Page 3: ...on and need not be changed for operation up to 2 000 feet elevation For operation at elevations above 2 000 feet manufactured to specified deration condi tions for Canada and the United States UNPACKI...

Page 4: ...re installing thermostat in a wall make sure there are no pipes or wiring in the hollow wallabovethefurnace Thethermostatwires will pass through this wall from the attic Mounting hardware needed to mo...

Page 5: ...000 BTU Hr Model Use a proper sized drill bit Drill holes through wall and into studs at marked locations 40 000 BTU Hr Model Use a proper sized drill bit On wall stud side of opening drill holes thro...

Page 6: ...ng Thermostat to Thermostat Mounting Plate 2 3 4 5 7 1 0 SO LID ST AT E IG NIT IO N 50 60 70 80 90 50 60 70 80 90 OF F 25 000 BTU Hr Models 3 Provide two 18 gauge insulated stranded wires for the ther...

Page 7: ...new black iron or steel pipe Copper tubing may be acceptable in cer tain areas Check local codes Use pipe large enough in diam eter to allow proper gas volume to furnace If pipe is too small undue los...

Page 8: ...lower left rear of furnace cabinet as viewed from rear see Figure 13 Remove knockout plug 9 Slide furnace back into furnace cabi net Make sure exhaust tube gaskets are in place Make sure exhaust and i...

Page 9: ...100 125 150 175 200 3 8 72 49 40 34 30 27 25 23 22 21 18 17 15 14 1 2 132 92 73 63 56 50 46 43 40 38 34 31 28 26 3 4 278 190 152 130 115 105 96 90 84 79 72 64 59 55 1 520 350 285 245 215 195 180 170...

Page 10: ...Locate NPT tap within reach for test gauge hook up NPT tap must be upstream from furnace see Figure 15 Install an equipment shutoff valve in an accessible location The equipment shutoff valve is for...

Page 11: ...net during installa tion You must correctly install furnace within cabinet If not front cover will not properly attach to cabinet Make sure gas kets for intake and exhaust tubes are in place Make sure...

Page 12: ...not try to light the burner by hand 8 Plug in furnace 9 Set thermostat to desired setting If thermostat is set above room tem perature the blower will come on 10 Allow approximately 45 seconds for ign...

Page 13: ...forces the combus tion products out of the exhaust tube s The Combustion air blower is sealed so that air does not pass between it and the circulating room air blower 3 When the blower motor reaches...

Page 14: ...mixture Wipe cabinet and front cover to remove dust Use a vacuum cleaner to remove dust from front cover louvers EXHAUST AND INTAKE VENTS Make sure the exhaust and intake vents are not blocked The in...

Page 15: ...okay check for defective motor 5 Be sure the microswitch is sailing in far enough to open the solenoid valve and to energize the ignition control If the switch is not sailing in clean any dust or dir...

Page 16: ...it WARNINGS Never connect unit or ignition circuit to 230 volts Never operate unit with glo bar touching burner or any other ground Damage to ignition control will occur Be sure sensor probe never to...

Page 17: ...bar broken 2 A Check for voltage 24 volts A C at valve 40 seconds after glo bar begins to glow If voltage present but valve not opening replace valve B If no voltage at valve check brown wire at igni...

Page 18: ...e sure probe is positioned in the burner flame and glowing cherry red Check wire and wire connections at probe and ignition control B If wire and wire connections okay check for voltage across brown a...

Page 19: ...hite Open WIRING DIAGRAMS Figure 21 Wiring Diagram 40 000 BTU Hr Model Figure 20 Wiring Diagram 25 000 BTU Hr Model Note Use only original replacement parts Thiswillprotectyourwarrantycoveragefor part...

Page 20: ...r SC 29687 0013 1 800 845 5301 803 879 3009 cuisales aol com Hughes Supply 1311 S Fern Street Arlington VA 22202 2809 703 416 8555 Tuco Industrial Products 5223 180th St SW Suite 4A 1 Lynwood WA 98037...

Page 21: ...1244 Operating Instructions Decal English 1 191246 Operating Instructions Decal French 1 531010 Warning Decal 1 191262 Nameplate 1 Parts available not shown You must order nameplate and operating inst...

Page 22: ...x 3 8 2 3 191241 Front Cover Trim 1 4 030642 Front Cover Assembly 1 5 100896 Cabinet Assembly 1 6 070511 Cabinet Insulation right and left sides 1 7 120158 Screw 8 x 3 8 2 8 160912 Thermostat include...

Page 23: ...44 Terminal Block 1 10 121224 Screw 10 x 3 4 2 11 070537 Gasket 1 12 231143 Transformer Assembly 1 13 121252 Screw 10 x 3 8 6 14 020983 Combustion Chamber Heat Shield Assembly 1 15 070606 Heat Shield...

Page 24: ...erminals 1 13 070607 Heat Shield Gasket 1 14 020982 Combustion Chamber Heat Shield Assembly 1 15 061663 Wire Clamp 2 16 121252 Screw 10 x 3 8 12 17 230560 Limit Switch 1 KEY PART NO NUMBER DESCRIPTION...

Page 25: ...3 4 5 6 7 8 9 10 11 12 KEY PART NO NUMBER DESCRIPTION QTY 1 120717 Hex Nut 10 24 2 2 121459 Screw 10 24 x 1 2 2 3 010701 Burner Assembly 1 4 180220 Main Burner Orifice 1 5 121388 Screw 10 x 1 2 4 6 07...

Page 26: ...ART NO NUMBER DESCRIPTION QTY 1 120717 Hex Nut 10 24 4 2 010621 Left Burner Assembly 1 3 010623 Right Burner Assembly 1 4 070591 Manifold Gasket 1 5 171167 Manifold Assembly 1 6 180189 Main Burner Ori...

Page 27: ...121388 Screw 10 x 1 2 4 11 070385 Crossover Tube Gasket 2 12 121227 Screw 10 24 x 1 2 2 13 070362 Universal Bushing 1 14 231231 Capacitor Boot 1 15 390296 Combustion Air and Motor Cover Assy Housing 1...

Page 28: ...205 Combustion Air Cover Assy 1 12 121388 Screw 10 x 1 2 3 13 070420 Combustion Air Crossover Gasket 1 14 390318 Combustion Air and Motor Cover Assembly 1 KEY PART NO NUMBER DESCRIPTION QTY 15 121227...

Page 29: ...___________________ _______________________________________________________________________________________________ ____________________________________________________________________________________...

Page 30: ...l be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIE...

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