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13

201839

OWNER’S MANUAL

OPERATING
FURNACE

(Continued)

1.

Set thermostat to lowest setting

2.

Turn equipment gas valve clockwise

 to OFF position. Do not force

equipment gas valve.

3.

Unplug furnace if service is to be per-
formed.

To Shut Down Furnace for an
Extended Period of Time

1.

Turn equipment gas valve clockwise

 to OFF position. Do not

force equipment gas valve.

2.

Set thermostat on OFF.

TO TURN OFF GAS

TO FURNACE

 CAUTION: Do not try to adjust

heating levels by using the equip-
ment shutoff valve.

The thermostat responds to the room tem-
perature. When the room temperature drops
below the thermostat setting, the thermostat
turns the furnace burner and blower on.
When the room temperature goes above the
thermostat setting, the thermostat turns the
furnace burner off. The blower will con-
tinue to blow about two to three minutes
after the burner goes out. The thermostat
keeps the room at a constant temperature.

THERMOSTAT

CONTROL

OPERATION

INSPECTING
BURNER FLAME

To observe burner flame, remove furnace
front cover. Remove the two screws at the
lower edges of front cover. Lift front cover
away. Locate viewing window on front of
combustion chamber. You can see burner
flame through this window.

Correct Burner Flame:

 Blue flame with

well-defined burner ports.

Incorrect Burner Flame:

 Yellow or lazy

flame without well-defined burner ports.

If burner flame is incorrect, shut off furnace
and contact a qualified service person.

Correct Flame

Pattern

Incorrect Flame

Pattern

Figure 19 - Burner Flame Patterns

NORMAL
OPERATING
SEQUENCE

1.

When the room temperature drops below
the thermostat setting, the thermostat calls
for heat. A 24-volt circuit is completed
through the time delay relay coil. After
three to five seconds, the contacts in the
relay close. The blowers come on.

2.

One motor drives both the combustion
air blower and the circulating room air
blower. The combustion air blower
draws air from outside through the in-
take air vent. This air discharges into
the combustion chamber. The combus-
tion air blower then 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 75% of
normal r.p.m. (three to five seconds), air
from the blower turns on the

microswitch. When the microswitch
activates, the electrical circuit is com-
pleted through the limit switch to the
control module. The glo bar begins to
glow. In about 15 seconds, the glo bar
becomes hot enough to ignite the burner.

4.

Another 24-volt circuit is completed
through the module to the main gas
valve. The valve opens. Gas passes
through the valve to the main burner.
The gas is ignited by the glo bar.

5.

After the main burner ignites, the flame
detector senses the presence of flame.
This opens the circuit to the glo bar.
The glo bar shuts down.

6.

The circulating room air blower pulls
return air in from the living area. This
air is heated as it flows past the com-
bustion chamber. The heated air is then
blown out into the room.

7.

When the room temperature rises above
the thermostat setting, the circuit to the
valve opens and the burner shuts off.

8.

The blower continues to run about two to
three minutes until the time delay relay
coil cools. When the coil cools, the circuit
to the motor opens. The blower shuts off.

LIMIT SWITCH

 WARNING: Do not operate

furnace without a properly work-
ing limit switch.

The limit switch will turn off the gas to the
main burner if the furnace becomes too hot.
When this happens, the main burner will go
out and the blower will continue to run for
two to three minutes. This usually happens
when circulating air is partially or com-
pletely blocked.

Occasional cycling of the limit switch is not
bad. This indicates safe operation. Limit
switch cycling will most likely occur on
warm days. If this happens too often or for
a long period of time, the circulating air
system should be thoroughly cleaned by a
qualified service person.

If the circulating air system is cleaned and
the limit switch continues to shut down the
furnace, the limit switch is defective. A
defective limit switch cannot be repaired. It
must be replaced. For safety reasons, never
operate the furnace without a limit switch.

Summary of Contents for DYNAVENT DNV25PB

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

Page 2: ...LP gas is odor less An odor making agent is added to pro pane LP gas The odor helps you detect a propane LPgasleak However theodoradded to propane LP gas can fade Propane LP gas may be present even t...

Page 3: ...For purposes of input adjustment SPECIFICATIONS Install and use furnace with care Follow all localcodes Intheabsenceoflocalcodes use the latest edition of the following National Fuel Gas Code ANS Z223...

Page 4: ...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 moun...

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: ...else that would interfere with install ing thermostat Do not mount thermo stat to stud If there are any obstruc tions choose a new location 3 Provide two 18 gauge insulated stranded wires for the the...

Page 7: ...t Wires to Thermostat Wall Anchors CAUTION Use only 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...

Page 8: ...de furnace back into furnace cabi net Make sure exhaust tube gaskets are in place Make sure exhaust and intake vent tubes extend into vent caps on back of cabinet Replace two screws by exhaust vent s...

Page 9: ...0 BTU Hr 15 000 BTU Hr for other gas appliances 55 000 BTU Hr total 55 000 2500 22 Locate 22 or higher on chart below According to the chart below you should use 40 feet or less of 3 8 pipe 125 feet o...

Page 10: ...5 CAUTION Usepipejointseal ant that is resistant to liquid pe troleum LP gas Slab Floor Installation Equipment Shutoff Valve Test Gauge Connection To Gas Supply 3 Min Sediment Trap Gas Piping Entering...

Page 11: ...0 cycle grounded outlet at furnace location 2 The furnace has a three pronged grounded plug Use only a grounded three prong outlet IMPORTANT Some local codes require rigid or semi rigid conduit or met...

Page 12: ...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...

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: ...r 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 i...

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: ...t 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 t...

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: ...Be 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...

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: ...41 www portableheaterparts com sales portableheaterparts com techservice portableheaterparts com F B D 1349 Adams Street Bowling Green KY 42103 3414 1 800 654 8534 270 846 1199 Fax 1 800 846 0090 fran...

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: ...8 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 inclu...

Page 23: ...44 Terminal Block 1 10 121224 Screw 10 x 3 4 2 11 070487 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: ...Terminals 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 DESCRIPTIO...

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 180215 Main Burner Orifice 1 5 121388 Screw 10 x 1 2 4 6 07...

Page 26: ...PART 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 180188 Main Burner Or...

Page 27: ...oom air 1 8 121421 Hex Lock Nut 10 24 3 9 050751 Crossover Tube 1 10 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 Cap...

Page 28: ...ombustion 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 Screw...

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

Page 30: ...lity 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 WARRANTIES AND LIMITS THE DU...

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