Vanguard VP1600ITB Quick start guide

Save this manual for future reference.
VP1600ITB
and
VP2200ITB
®
INFRARED VENT-FREE PROPANE/LP GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any 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.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call
the fire department.
— Installationandservicemustbeperformedby
a qualified installer, service agency, or the
gas supplier.
WARNING:Thisisanunvented
gas-firedheater.Itusesair(oxy-
gen) from the room in which it
is installed. Provisions for ad-
equate combustion and venti-
lation air must be provided.
Refer to Air For Combustion
and Ventilation on page 4 of
this manual.
WARNING: Improper installa-
tion, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correctinstallationandopera-
tional procedures. For assis-
tance or additional informa-
tion consult a qualified in-
staller, service agency, or the
gas supplier.
This appliance may be installed in an aftermarket*, permanently located, manufactured
(mobile) home, where not prohibited by local codes.
Thisapplianceisonlyforusewiththetypeofgasindicatedontheratingplate.Thisappliance
is not convertible for use with other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

2
104247
VENT-FREE PROPANE/LP GAS HEATER
®
SAFETY
INFORMATION
1. This appliance is only for use with the
typeof gasindicated on therating plate.
Thisappliance isnot convertiblefor use
with other gases.
2. Do notplace propane/LPsupply tank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.
3. This heater shall not be installed in a
bedroom or bathroom.
4. If you smell gas
• Shut off gas supply
• Do not try to light any appliance
• Donot touchany electricalswitch;do
not use any phone in your building
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• Ifyou cannotreach yourgas supplier,
call the fire department
Carbon Monoxide Poisoning: Early signs
ofcarbonmonoxidepoisoningresemblethe
flu, with headaches, dizziness, or nausea. If
you have these signs, the heater may not be
working properly. Get fresh air at once!
Haveheaterserviced.Somepeoplearemore
affected by carbon monoxide than others.
These include pregnant women, persons
with heart or lung disease or anemia, those
under the influence of alcohol, and those at
high altitudes.
Propane/LP Gas: Propane/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 though no odor exists.
Make certain you read and understand all
warnings.Keepthismanualforreference.It
isyourguidetosafeandproperoperation of
this heater.
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING: Any change to
this heater or its controls can be
dangerous.
5. Always run heater with plaque control
knob at the 1, 2, 3, or 4 locked posi-
tions. Never set control knob between
locked positions. Poor combustion and
higher levels of carbon monoxide may
result.
6. This heaterneeds fresh,outside air ven-
tilation to run properly.This heater has
an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS shuts
down the heater if not enough fresh air
isavailable. SeeAirforCombustion and
Ventilation, pages 4 through 6.
7. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
8. Before usingfurniture polish, wax,car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts may createa white pow-
der residue within burner box or on
adjacent walls or furniture.
9. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
10. Do not use heater if any part has been
under water. Immediately call a quali-
fied service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
11. Turn off and unplug heater and let cool
before servicing. Only a qualified ser-
vice person should service and repair
heater.
12. Operating heater above elevations of
4,500 feet could cause pilot outage.
13. To prevent performance problems, do
not use propane/LP fuel tank of less
than 100 lbs. capacity.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Surface of heater becomes very
hot when running heater. Keep
children and adults away from
hot surface to avoid burns or
clothing ignition. Heater will re-
main hot for a time after shut-
down. Allow surface to cool be-
fore touching.
Carefully supervise young chil-
dren when they are in the same
room with heater.
Make sure grill guard is in place
before running heater.
Keeptheapplianceareaclearand
free from combustible materials,
gasoline, and other flammable
vapors and liquids.
Due to high temperatures, the
appliance should be located out
oftrafficandawayfromfurniture
and draperies.
WARNING: Do not use any
accessory not approved for use
with this heater.

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104247
OWNER’S MANUAL
PRODUCT
FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen
DepletionSensing(ODS)safetyshutoffsys-
tem.The ODS/pilotis arequired featurefor
vent-freeroomheaters.TheODS/pilotshuts
offtheheaterifthereisnotenoughfreshair.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
THERMOSTATIC HEAT
CONTROL
This heater has a thermostat sensing bulb
and thermostat control. This results in the
greatestheater comfort. Thiscan alsoresult
in lower gas bills.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging ap-
plied to heater for shipment.
3. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of National Fuel Gas Code
ANS Z223.1, also known as NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Figure 1 - Vent-Free Propane/LP Gas Heater (Model VP2200ITB Shown)
Burners
Front
Panel
Grill
Guard
Heater
Cabinet
PRODUCT
IDENTIFICATION
Piezo Ignitor Control Knob
Thermostat Control Knob

4
104247
VENT-FREE PROPANE/LP GAS HEATER
®
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstripand caulkaroundwindowsand
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,yourhomeneedstobreathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaustfans,fireplaces,clothesdryers,and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsforplumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 6 .
If your home does not meet all of the
threecriteriaabove,proceedto Deter-
mining Fresh-Air Flow for Heater
Location, page 5.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Confined and Unconfined Space
The National Fuel Gas Code ANS Z223.1
defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3per kw) of the aggre-
gate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate input rating of all
appliances installed in that space. Rooms
communicating directly with the space in
whichtheappliancesareinstalled*,through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisions areprovided foradequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.

5
104247
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween
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. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater ______________ Btu/Hr
Gas water heater* ______________ Btu/Hr
Gas furnace ______________ Btu/Hr
Vented gas heater ______________ Btu/Hr
Gas fireplace logs ______________ Btu/Hr
Other gas appliances* +______________ Btu/Hr
Total = ______________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
____________ Btu/Hr (maximum the space can support)
____________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
56,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater +16,000 Btu/Hr
Total =56,000 Btu/Hr
Continued
WARNING:Iftheareainwhichthe heatermay beoperated issmallerthanthatdefinedasanunconfinedspace
orifthe buildingisof unusually tightconstruction,provide adequate combustionandventilation airbyoneof the
methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.

6
104247
VENT-FREE PROPANE/LP GAS HEATER
®
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
VENTILATION AIR
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(seeoptions1and2,Figure2).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 3 - Ventilation Air from Outdoors
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT: Do not provide openings
for inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated air
enteringthe attic willactivate the powervent.
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic

7
104247
OWNER’S MANUAL
36"
3"
FLOOR
CEILING
Minimum
Minimu
m
Of Carp
e
Combus
t
8"
Minimum
From
Sides Of
Heater
Left
Side Right Side
INSTALLATION
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
CHECK GAS TYPE
Useonlypropane/LPgas.Ifyourgassupply
isnotpropane/LP,donotinstallheater.Call
dealer where you bought heater for proper
type heater.
INSTALLATION ITEMS
Beforeinstallingheater,makesureyouhave
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA/AGA design-certified equipment
shutoff valve with 1/8" NPT tap is an ac-
ceptable alternative to test gauge connec-
tion. Purchase the optional CSA/AGA de-
sign-certifiedequipmentshutoffvalvefrom
your dealer. See Accessories, page 23.
LOCATING HEATER
This heater is designed to be mounted on a
wall.
WARNING:Maintainthemini-
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ancesfromfloor,ceiling,andjoin-
ing wall.
Youcan locateheater onfloor, awayfrom a
wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand
fromyourdealer. SeeAccessories, page23.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• locateheaterwheremovingve-
hicle will not hit it
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 to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
IMPORTANT: Vent-freeheatersaddmois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Air for Combustion
and Ventilation, pages 4 through 6.
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heatsource.If you haveacentral
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
Continued
Forconvenienceandefficiency,installheater
• where there is easy access for operation,
inspection, and service
• in coldest part of room
An optional fan kit is available from your
dealer. See Accessories, page 23. If plan-
ningtousefan,locateheaternear anelectri-
cal outlet.
Figure4-MountingClearancesAsViewed
From Front of Heater
Minimum
To Top
Surface
Of carpeting, Tile or
Other Combustible
Material

8
104247
VENT-FREE PROPANE/LP GAS HEATER
®
THERMOSTAT SENSING
BULB
The thermostat sensing bulb has been placed
insidetheheaterforprotectionduringshipping.
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 7).
2. Locate thermostat sensing bulb just
under burner assembly.
IMPORTANT: Attach thermostat sensing
bulb to back of heater for proper operation.
Attaching Thermostat Sensing
Bulb
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
2. Place clampon thermostatsensing bulb
as shown in Figure 5. Clamp is pro-
vided in hardware package.
3. Snap clamp into upper mounting hole
as shown in Figure 5. Mounting hole is
located on lower left edge on back of
heater. Make sure the thermostat sens-
ing bulb is pointing up.
Figure 5 - Attaching Thermostat Sensing
Bulb
Clamp
Thermostat
Sensing Bulb
INSTALLING HEATER TO
WALL
Mounting Bracket
Locate mounting bracket in heater carton.
Remove mounting bracket from carton.
INSTALLATION
Continued
Figure 6 - Mounting Bracket
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel.
2. Liftstraightupongrillguarduntilitstops.
Grill guard will slide up about 1/4".
3. Pull bottomof frontpanel forward,then
down.
Figure7-RemovingFrontPanelOfHeater
Methods For Attaching
Mounting Bracket To Wall
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways.
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching To Wall Stud: This method pro-
vides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
Attaching To Wall Anchor: This method
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
2. Mark screw locations on wall (see Fig-
ure 8).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket
from wall.
Model VP2200ITB
Model VP1600ITB
18 3/4"
Min.
13"
Min. 16"
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
Figure 8 - Mounting Bracket Clearances
WARNING:Maintainminimum
clearances shown in Figure 8. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
16"
18 3/4"
Min.
9 1/4"
Min.
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor

9
104247
OWNER’S MANUAL
Attaching Mounting Bracket To
Wall
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with heater.
Attaching To Wall Stud Method
Forattachingmountingbrackettowallstuds
1. Drill holes at marked locations using
9/64" drill bit.
2. Place mountingbracket onto wall.Line
uplast hole oneach end ofbracket with
holes drilled in wall.
3. Insert mountingscrews throughbracket
and into wall studs.
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
1. Drill holes at marked locations using
5/16"drill bit. Forsolid walls (concrete
or masonry), drill at least 1" deep.
2. Fold wall anchor as shown in Figure 9.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
IMPORTANT: Do not hammer key!
Forthick walls(over 1/2"thick) orsolid
walls, do not pop open wings.
5. Place mountingbracket onto wall.Line
uplast hole oneach end ofbracket with
wall anchors.
6. Insert mountingscrews throughbracket
and into wall anchors.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
Figure 9 - Folding Anchor
Figure 10 - Popping Open Anchor Wings
For Thin Walls
Stand-Out Tab
INSTALLATION
Continued
Figure 11 - Mounting Heater Onto
Mounting Bracket
Mounting Bracket
(attached to wall)
Horizontal Slots
Figure 12 - Installing Bottom Mounting
Screws
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater.
2. Place heater onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of heater (see Figure 12).
2. Mark screw locations on wall.
3. Remove heaterfrom mountingbracket.
4. If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 un-
der Attaching To Wall Anchor Method.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled
hole.
7. Hold spacer in place with one hand.
With otherhand, insertmounting 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 connections and checking for leaks
(see pages 10 and 11).
Continued

10
104247
VENT-FREE PROPANE/LP GAS HEATER
®
CONNECTING TO GAS
SUPPLY
WARNING:Aqualifiedservice
personmustconnectheatertogas
supply. Follow all local codes.
Typical Inlet Pipe Diameters
VP1600ITB 3/8" or greater
VP2200ITB 1/2" or greater
Installation must include equipment shutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 14).
IMPORTANT: Installanequipmentshutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeoflarge
enough diameter to allow proper
gas volume to heater. If pipe is
too small, undue loss of pres-
sure will occur.
Propane/LP
Supply Tank
Figure 13 - External Regulator With Vent
Pointing Down
External
Regulator
CAUTION: Never connect
heaterdirectlyto thepropane/LP
supply. This heater requires an
externalregulator(notsupplied).
Install the external regulator be-
tweentheheaterandpropane/LP
supply.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incominggaspressuretobetween11and14
inchesofwater.Ifyoudonotreduceincom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
13. Pointing the vent down protects it from
freezing rain or sleet.
Installsedimenttrapinsupplylineasshown
in Figure 14. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
menttrap where trappedmatter is notlikely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
Vent
Pointing
Down
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Sediment
Trap
Tee Joint
Pipe Nipple
Cap
Equipment Shutoff Valve *
3/8" NPT
Pipe Nipple
Ground Joint
Union
Heater
Cabinet
Figure 14 - Gas Connection
* ACSA/AGAdesign-certifiedequipmentshutoffvalvewith1/8"NPTtapisanacceptable
alternative to test gauge connection. Purchase the optional CSA/AGA design-certified
equipment shutoff valve from your dealer. See Accessories, page 23.
3" Minimum
From
External
Regulator
(11" W.C. to
14" W.C.
Pressure)
Regulator Bracket
Pressure Regulator
Typical Inlet Pipe
INSTALLATION
Continued
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing intopipe. Excesssealant inpipe
could result in clogged heater valves.
WARNING:Thisappliancere-
quires a 3/8" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.

11
104247
OWNER’S MANUAL
O
PO
S
P
CHECKING GAS
CONNECTIONS
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
maingasvalve(controlvalve)andequip-
ment shutoff valve from gas supply pip-
ingsystem.Pressuresinexcessof1/2psig
will damage heater regulator.
2. Cap off open end of gas pipe where
equipmentshutoffvalve wasconnected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
CAUTION: Make sure external
regulator has been installed be-
tween propane/LP supply and
heater. See Connecting to Gas
Supply on page 10.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
Figure 15 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Propane/LP
Supply Tank
Control Valve Location
Figure 16 - Checking Gas Joints
Open
Closed
TestPressures EqualTo orLess Than1/2
PSIG (3.5 kPa)
1. Close equipmentshutoffvalve (seeFig-
ure 15).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
3. Check all joints from propane/LP sup-
plytank toequipment shutoffvalve (see
Figure 16). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas
Connections
1. Open equipmentshutoffvalve (seeFig-
ure 15).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in
the OFF position.
4. Check alljoints fromequipment shutoff
valve to control valve (see Figure 16).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 12 and 13). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 13).
8. Replace front panel.
Equipment
Shutoff
Valve
INSTALLATION
Continued

12
104247
VENT-FREE PROPANE/LP GAS HEATER
®
IGNITOR
PILOT
LO
OFF
HI
1
2
3
4
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
A. Thisappliancehasa pilotwhich must
belightedbyhand.Whenlightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.Be
suretosmell next tothe floorbecause
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.
• Donottouchanyelectricswitch;do
notuse any phonein yourbuilding.
• Immediatelycall yourgas 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. Useonlyyourhandtopushinor turn
thegas controlknob.Neverusetools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. 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.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
at the top of column 1.
2. Make sure equipment shutoff valve
is fully open.
3. Turnthermostatcontrol knob onleft
side of heater clockwise
Clockwise
to
the OFF position.
4. Wait five 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-
formationat thetopcolumn 1. Ifyou
don’t smell gas, go to the next step.
5. Turn thermostat control knob on
left side of heater counterclockwise
C-clockwise
to the PILOT position.
Pressin thermostat controlknob for
5 seconds.
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, you may
need to press in thermostat control
knob for 30 seconds. This will allow
air to bleed from the gas system.
• If thermostat control knob does not
pop up when released, contact a
qualified service person or gas sup-
plier for repairs.
6. Keep thermostat control knob
pressed in while pushing down and
releasingtheignitorbutton.This will
light pilot. If necessary, continue to
pressignitorbuttonuntilpilot lights.
If pilot does not light
• turn thermostat control knob
clockwise
Clockwise
to the OFF po-
sition
• repeat steps 5 and 6
If pilot does not stay lit after sev-
eral tries
• refer to Troubleshooting, pages 15
through 17
• contact a qualified service person
or gas supplier
Until repairs are made, light pilot
with match. To light pilot with
match, see Manual Lighting Pro-
cedure, page 13.
7. Keep thermostat control knob
pressed in for 30 seconds after light-
ing pilot. After 30 seconds, release
control knob.
Note: If pilot goes out, repeat steps
3 through 7.This heater has a safety
interlock system. Wait one minute
before lighting pilot again.
8. Turn thermostat control knob coun-
terclockwise
C-clockwise
to the desired
heating level. The plaque directly
above the pilot should light.
Figure 17 - Thermostat Control Knob In The OFF Position
Thermostat
Control Knob Plaque
Control Knob
Ignitor Button
Figure 18 - Pilot
Pilot Burner
Thermocouple Ignitor Electrode

13
104247
OWNER’S MANUAL
OPERATING
HEATER
Continued
TO SELECT
HEATING LEVEL
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
WARNING: When running
heater, set control knob at the 1,
2, 3, or 4 locked positions. Never
set control knob between locked
positions. Poor combustion and
higher levels of carbon monox-
ide may result.
1. Slightlypressinplaque controlknob
onrightsideof heaterandturncoun-
terclockwise
C-clockwise
to the desired
position.
IMPORTANT: Release downward
pressure while turningcontrolknob.
Control knob will lock at the desired
position.
2. Turnthermostatcontrolknobon left
side of heater to any setting between
LO and HI. Note: When burners
cycle on, or from LO to HI, a “click”
will be heard. When the burners
light,a “whoosh”noisewill beheard.
Plaque
Control Knob VP1600ITB VP2200ITB
Figure 19 - Burner Patterns
TO TURN OFF GAS
TO APPLIANCE
1. Followsteps1through5 underLight-
ing Instructions, page 12.
2. With thermostat control knob
pressedin,strikematch. Holdmatch
to pilot until pilot lights.
3. Keep thermostat control knob
pressed in for 30 seconds after light-
ing pilot. After 30 seconds, release
control knob. Follow step 8 under
Lighting Instructions, page 12.
Shutting Off Heater
1. Turnthermostatcontrol knobclock-
wise
Clockwise
to the OFF position.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn thermostat control knob clockwise
Clockwise
to the PILOT position.
THERMOSTAT
OPERATION
The thermostat measures the tempera-
ture of air near the heater cabinet. This
may not always agree with room tem-
perature(dependingonhousingconstruc-
tion,installationlocation,roomsize,open
air temperatures, etc.). Frequent use of
your heater will let you determine your
own comfort levels.
MANUAL LIGHTING
PROCEDURE
3
4
21
3
4
21
3
4
21
3
4
21

14
104247
VENT-FREE PROPANE/LP GAS HEATER
®
GRH/OV 007GOOD PILOT/LP
Thermocouple
Pilot Burner
Figure 20 - Correct Pilot Flame Pattern
Thermocouple
GRH/OV 008BAD PILOT/LP
Pilot Burner
Figure 21 - Incorrect Pilot Flame Pattern
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 20 shows a correct pilot flame pat-
tern. Figure 21 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
If pilot flame pattern is incorrect, as shown
in Figure 21
• turn heater off (see To Turn Off Gas to
Appliance, page 13)
• seeTroubleshooting,pages 15 through 17
Figure 22 - Correct Burner Flame Pattern
Bad Burner Pattern-Plaque GRH/OV 019
Figure23-IncorrectBurnerFlamePattern
BURNER FLAME PATTERN
Figure 22 shows a correct burner flame
pattern.Figure23showsanincorrectburner
flame pattern.
Ifburnerflamepatternisincorrect,asshown
in Figure 23
• turn heater off (see To Turn Off Gas to
Appliance, page 13)
• seeTroubleshooting,pages 15 through 17
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
bedding material, pet hair, etc.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
Figure 24 - Pilot Inlet Air Hole
Pilot Assembly
CLEANING BURNER
PILOT AIR INLET HOLE
We recommend that you clean the unit every
2,500hoursofoperationoreverythreemonths.
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
anddirt. Tocleanthese partswerecommend
usingcompressed air nogreater than 30PSI.
Yourlocalcomputerstore,hardwarestore,or
home center may carry compressed air in a
can. You can use a vacuum cleaner in the
blow position. If using compressed air in a
can, please follow the directions on the can.
Ifyoudon'tfollowdirectionsonthecan, you
could damage the pilot assembly.
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
2. Inspect burner, pilot for dust and dirt.
3. Blow air through the ports/slots and
holes in the burner.
Clean the pilot assembly also. A yellow tip
on the pilot flame indicates dust and dirt in
the pilot assembly. There is a small pilot air
inlet hole about two inches from where the
pilot flame comes out of the pilot assembly
(see Figure 24). With the unit off, lightly
blowair throughthe airinlet hole.You may
blowthroughadrinkingstrawifcompressed
air is not available.
Pilot Air Inlet
Hole

15
104247
OWNER’S MANUAL
TROUBLESHOOTING WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to igni-
tor cable
4. Ignitor cable pinched or wet
5. Broken ignitor cable
6. Bad piezo ignitor
7. Piezo ignitor nut is loose
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not pressed in while press-
ing ignitor button (non-thermostat mod-
els only)
Thermostat control knob not pressed in
(thermostat models only)
3. Air in gas lines when installed
4. Depleted gas supply
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
7. Thermostat control knob is not in pilot
position (thermostat models only)
1. Control knob not fully pressed in
2. Control knobnot pressedin long enough
3. Equipment shutoff valve not fully open
4. Thermocouple connection loose at con-
trol valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
8. Safety interlock system has been trig-
gered (thermostat models only)
REMEDY
1. Replace ignitor
2. Replace ignitor
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry.
5. Replace ignitor cable
6. Replace control valve (piezo is part of
control valve)
7. Tighten nut holding piezo ignitor. Nut
is located inside heater cabinet at top
1. Turn on gas supply or open equipment
shutoff valve
2. Press in control knob while pressing igni-
tor button (non-thermostat models only).
Press in thermostat control knob while
turningto PILOT/IGNposition (thermo-
stat models only)
3. Continue holdingdown controlknob. Re-
peatignitingoperationuntilairis removed
4. Contact local propane/LP gas company
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 14) or replace ODS/
pilot assembly
6. Replace gas regulator
7. Turn thermostat control knob to pilot
position
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open equipment shutoff valve
4. Hand tighten until snug, then tighten 1/4
turn more
5. A) Contact local propane/LP gas com-
pany
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 14) or replace ODS/
pilot assembly
6. Replace thermocouple
7. Replace control valve
8. Waitone minute for safetyinterlock sys-
tem to reset. Repeat ignition operation
OBSERVED PROBLEM
Whenignitorbuttonispressedin,thereisno
spark at ODS/pilot
When ignitor button is pressed in, there is a
spark at ODS/Pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
Continued
Note: For additional help, visit DESA
International’stechnicalservicewebsite
at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

16
104247
VENT-FREE PROPANE/LP GAS HEATER
®
REMEDY
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Replace burner orifice(s)
3. Contact local propane/LP gas company
1. Contact local propane/LP gas company
2. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
1. Clean burner orifice(s) (see Cleaning
and Maintenance, page 14) or replace
burner orifice(s)
2. Replace burner
3. Replace gas regulator
1. Replace burner
2. Contact local propane/LP gas company
3. Turn control knob until it locks at de-
sired setting
1. Problem will stop after a few hours of
operation
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
POSSIBLE CAUSE
1. Burner orifice(s) is clogged
2. Burner orifice(s) diameter is too small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Burner orifice(s) is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Inlet gas pressure is too low
3. Control knob set between locked
positions
1. Residues from manufacturing processes
1. Metal expanding while heating or con-
tracting while cooling
1. When heated,vapors from furniturepol-
ish, wax, carpet cleaner, etc., turn into
white powder residue
OBSERVED PROBLEM
Burner(s)does notlightafter ODS/pilotis lit
Delayed ignition of burner(s)
Burner backfiring during combustion
Burner plaque(s) does not glow
Slightsmoke orodorduring initialoperation
Heater produces a clicking/ticking noise
just after burner is lit or shut off
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
TROUBLESHOOTING
Continued
www.desatech.com

17
104247
OWNER’S MANUAL
WARNING: If you smell gas
• Shut off gas supply.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your
building.
• Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,
etc., create fumes. These fumes may mix with combustion air and create odors.
POSSIBLE CAUSE
1. Heater burning vapors from paint, hair
spray, glues, etc. See IMPORTANT
statement above
2. Low fuel supply
3. Gas leak. SeeWarning statement at
top of page
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. SeeWarning statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. SeeWarning statement at
top of page
1. Not enough combustion/ventilation air
OBSERVED PROBLEM
Heater produces unwanted odors
Heater shuts off in use (ODS operates)
Gas odor even when control knob is in OFF
position
Gas odor during combustion
Moisture/condensationnoticedonwindows
REMEDY
1. Ventilate room. Stop using odor caus-
ing products while heater is running
2. Refill supply tank
3. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
1. Open windowand/or doorforventilation
2. Contact local propane/LP gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 14)
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 11)
1. Refer to Fresh Air for Combustion and
Ventilation requirements (page 4)
TROUBLESHOOTING
Continued
www.desatech.com

18
104247
VENT-FREE PROPANE/LP GAS HEATER
®
ILLUSTRATED
PARTS
BREAKDOWN
VP1600ITB
21-15
21-14
1
2
3
11
6
48
5
6
7
12
21
910
22
14
16
19
20
18
17
15
13
A
B
C
21-1
21-2
21-3
21-4
21-5 21-6
21-7
21-8
21-13
21-10
21-1121-9
21-12

19
104247
OWNER’S MANUAL
PARTS LIST
VP1600ITB
Thislistcontainsreplaceablepartsusedinyourheater.Whenorderingparts,followtheinstructionslisted
under Replacement Parts on page 22 of this manual.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 098742-13 Front Panel 1
3 098238-06 Grill Guard 1
4 101108-01 Clip-Grill Guard 2
5 098198-03 Apron 1
6 M11084-26 Screw, #10 x 3/8" 9
7 098462-01 Control Rod Assembly 1
8 098457-01 Reflector Assembly 1
9 099415-09 Regulator 1
10 M11084-38 Screw, #8 x 3/8" 2
11 104617-01 Cabinet Assembly 1
12 098324-01 Control Knob 1
13 098325-01 Roll Pin 1
14 097159-04 Piezo Ignitor 1
15 100537-02 Regulator Bracket 1
16 098522-16 Thermostat Gas Valve 1
17 098271-03 Ignitor Cable 1
18 104224-01 SIT Tube 1
19 104197-01 Inlet Tube 1
20 099211-01 Hex-Head Screw 2
21 See Detail Burner Assembly 1
21-1 099218-01 Burner 1
21-2 098508-01 Valve Retainer Nut 1
21-3 099056-01 Injector 3
21-4 099048-01 Tubing-Valve to Plaque A 1
21-5 099049-02 Tubing-Valve to Plaque B 1
21-6 099050-01 Tubing-Valve to Plaque C 1
21-7 100605-01 Control Valve 1
21-8 099387-06 Pilot Tubing-Thermostat Control Valve to Pilot 1
21-9 100616-01 Control Valve Tube 1
21-10 103594-04 ODS/Pilot 1
21-11 100615-01 Male Connector 2
21-12 M11084-37 Screw, #8 x 1/4" 3
21-13 M11084-26 Screw, #10 x 3/8" 2
21-14 098514-01 Thermocouple 1
21-15 106842-01 Ignitor Electrode 1
22 099066-01 Mounting Bracket 1
PARTS AVAILABLE - NOT SHOWN
100619-01 Thermostat Control Position Label 1
100619-03 Control Position Label 1
100642-01 Hardware Assembly 1

20
104247
VENT-FREE PROPANE/LP GAS HEATER
®
ILLUSTRATED
PARTS
BREAKDOWN
VP2200ITB
21-16
21-15
1
2
3
11
6
48
5
6
7
12
21
910
22
14
16
19
20 17
15
13
18
D
C
21-1
21-2
21-3
21-7
21-12
21-11
21-10
B
A
21-5
21-4
21-8
21-6
21-9
21-13
21-14