Desa NZ108 Original instructions

UNVENTED (VENT-FREE) INFRARED GAS HEATER

SAFETY INFORMATION AND INSTALLATION MANUAL

MODELS NZ108 AND NZ109

For more information, visit www.desatech.com

WARNING: If the information in this manual is not fol-





         





— WHAT TO DO IF YOU SMELL GAS

 

• Do not touch any electrical switch; do not use any



 



 



 -







Actual heater may

vary from illustration

www.desatech.com 119171-01E2

SAFETY INFORMATION

  -

  -

teration, service or mainte-





this manual for correct in-

  

  -

tance or additional infor-







WARNING: This is an

  -

    

from the room in which





and ventilation air must

Air

for Combustion and Ven-

tilation





     

   

   

   



-

stalled in an aftermarket,*

 

 

-







   

  

chemicals known to the State

of California to cause cancer or

-







   

    



    

   

   



TAbLE OF CONTENTS

Safety Information ............................................... 2

Local Codes......................................................... 4

Product Identication........................................... 4

Unpacking............................................................ 4

Product Features................................................. 4

Air For Combustion and Ventilation..................... 5

Installation ........................................................... 7

Operating Heater............................................... 14

Inspecting Heater .............................................. 16

Cleaning and Maintenance................................ 17

Troubleshooting................................................. 18

Specications .................................................... 21

Wiring Diagrams................................................ 21

Illustrated Parts Breakdown and Parts List........ 22

Replacement Parts............................................ 25

Service Hints ..................................................... 25

Technical Service............................................... 25

Service Publications .......................................... 25

Accessories ....................................................... 26

Parts Central...................................................... 27

Warranty Information ...........................Back Cover

www.desatech.com 3119171-01E





   Early signs

of carbon monoxide poisoning resemble the

u, with headaches, dizziness or nausea. If

you have these signs, the heater may not

be working properly. 

Have heater serviced. Some people are

more affected by carbon monoxide than oth-

ers. These include pregnant women, people

with heart or lung disease or anemia, those

under the inuence of alcohol and those at

high altitudes.

 Natural and

Propane/LP gases are odorless. An odor-

making agent is added to these gases. The

odor helps you detect a gas leak. However,

the odor added to the gas can fade. Gas may

be present even though no odor exists.

Make certain you read and understand all

warnings. Keep this manual for reference. It

is your guide to safe and proper operation of

this heater.

    

this heater or its controls can



WARNING: Do not use a

   

-



    







  

    







    

childrenandadultsawayfromhot



    





-

dren when they are in the same







    

-

-



1. This appliance is only for use with the type

of gas indicated on the rating plate. This

appliance is not convertible for use with

other gases.

2. Do not place propane/LP supply 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

• 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 re department

5. Always run heater with plaque control

knob at the locked positions. Never set

control knob between locked positions.

Poor combustion and higher levels of

carbon monoxide may result.

6. This heater needs fresh, outside air ventila-

tion to run properly. This heater has an Oxy-

gen Depletion Sensing (ODS) safety shutoff

system. The ODS shuts down the heater if

not enough fresh air is available. See Air for

Combustion and Ventilation, page 5.

7. Keep all air openings in front and bottom

of heater clear and free of debris. This will

insure enough air for proper combustion.

SAFETY INFORMATION

Continued

www.desatech.com 119171-01E4

8. If heater shuts off, do not relight until you

provide fresh, outside air. If heater keeps

shutting off, have it serviced.

9. Do not run heater

• where ammable 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ed

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 qualied service

person should service and repair heater.

12. Operating heater above elevations of 4,500

feet (1,371 m) could cause pilot outage.

13. To prevent performance problems, do not

usepropane/LPfueltankoflessthan100lbs.

(45 kg) capacity.

14. Before using furniture polish, wax, carpet

cleaner or similar products, turn heater off. If

heated, the vapors from these products may

create a white powder residue within burner

box or on adjacent walls or furniture.

15. Provide adequate clearances around air

openings.

LOCAL CODES

Install and use heater with care. Follow all

local codes. In the absence of local codes,

use the latest edition of The National Fuel

Gas Code, ANSI Z223.1/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

State of Massachusetts: The installation

must be made by a licensed plumber or

gas tter in the Commonwealth of Mas-

sachusetts.

Sellers of unvented propane or natural

gas-red supplemental room heaters shall

provide to each purchaser a copy of 527

CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for

bedroom and bathroom installation in the

Commonwealth of Massachusetts.

SAFETY INFORMATION

Continued

Figure 1 - Vent-Free Gas Heater

UNpACkING

1. Remove heater from carton.

2. Remove all protective packaging applied

to heater for shipment.

3. Check heater for any shipping damage.

If heater is damaged, promptly return to

where you bought heater.

pRODUCT FEATURES

SAFETY DEVICE

This heater has a pilot with an Oxygen Deple-

tion Sensing (ODS) safety shutoff system. The

ODS/pilot is a required feature for vent-free

room heaters. The ODS/pilot shuts off the

heater if there is not enough fresh air.



This heater has a piezo ignitor. This system re-

quires no matches, batteries or other sources

to light heater.

THERMOSTATIC HEAT CONTROL

Thermostat models have a thermostat sens-

ing bulb and a control valve. This results in the

greatest heater comfort. This can also result

in lower gas bills.

Ignitor Button

Control Knob

Heater Cabinet

Front Panel

Plaque

Grill

Guard

pRODUCT

IDENTIFICATION

www.desatech.com 5119171-01E

AIR FOR COMbUSTION

AND VENTILATION

WARNING: This heater shall

     

    -



-





     

  



Today’s homes are built more energy efcient

than ever. New materials, increased insulation

and new construction methods help reduce

heat loss in homes. Home owners weather

strip and caulk around windows and doors

to keep the cold air out and the warm air in.

During heating months, home owners want

their homes as airtight as possible.

While it is good to make your home energy

efcient, your home needs to breathe. Fresh

air must enter your home. All fuel-burning ap-

pliances need fresh air for proper combustion

and ventilation.

Exhaust fans, replaces, clothes dryers and

fuel burning appliances draw air from the house

to operate. You must provide adequate fresh

air for these appliances. This will insure proper

venting of vented fuel-burning appliances.



VENTILATION

The following are excerpts from National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Section

5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three

following ventilation classications:

1. Unusually Tight Construction

2. Unconned Space

3. Conned Space

The information on pages 5 through 7 will help

you classify your space and provide adequate

ventilation.



The air that leaks around doors and windows

may provide enough fresh air for combustion

and ventilation. However, in buildings of un-

usually tight construction, you must provide

additional fresh air.

Unusually tight construction is dened as

construction where:

a. walls and ceilings exposed to the outside

atmosphere have a continuous water

vapor retarder with a rating of one perm

(6 x 10-11 kg per pa-sec-m2) or less with

openings 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, between sole plates and oors,

between wall-ceiling joints, between wall

panels, at penetrations for plumbing, electri-

cal and gas lines and at other openings.

If your home meets all of these three criteria,

you must provide additional fresh air. See

Ventilation Air From Outdoors, page 7.

If your home does not meet all of the three

criteria above, proceed to Determining Fresh-

Air Flow For Heater Location, page 6.



The National Fuel Gas Code, ANSI Z223.1/

NFPA 54 denes a conned space as a space

whose volume is less than 50 cubic feet per

1,000 Btu per hour (4.8 m3per kw) of the ag-

gregate input rating of all appliances installed

in that space and an unconned space as a

space whose volume is not less than 50 cubic

feet per 1,000 Btu per hour (4.8 m3per kw)

of the aggregate input rating of all appliances

installed in that space. Rooms communicating

directly with the space in which the appliances

are installed*, through openings not furnished

with doors, are considered a part of the un-

conned space.

* Adjoining rooms are communicating only if

there are doorless passageways or ventilation

grills between them.

www.desatech.com 119171-01E6

DETERMINING FRESH-AIR FLOW

FOR HEATER LOCATION





Use this work sheet to determine if you have

a conned or unconned space.

 Includes the room in which you will install

heater plus any adjoining rooms with doorless

passageways or ventilation 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. (6.1 m) (length)

x 16 ft. (4.88 m) (width) x 8 ft. (2.44 m)

(ceiling height) = 2560 cu. ft. (72.49 m3)

(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. Multiply the space volume by 20 to determine

the maximum Btu/Hr the space can support.

________ (volume of space) x 20 = (Maxi-

mum Btu/Hr the space can support)

Example: 2560 cu. ft. (72.49 m3) (volume of

space) x 20 = 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 replace 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.

Example:

Gas water heater ____________Btu/Hr

Vent-free heater + ___________Btu/Hr

Total = ___________Btu/Hr

4. Compare the maximum Btu/Hr the space can

support with the actual amount of Btu/Hr used.

_______ Btu/Hr (maximum can support)

_______ Btu/Hr (actual amount)

AIR FOR COMbUSTION

AND VENTILATION

Continued

Example: 51,200 Btu/Hr (maximum the

space can support)

60,000 Btu/Hr (actual amount of

Btu/Hr used)

The space in the above example is a conned

space because the actual Btu/Hr used is more

than the maximum Btu/Hr the space can sup-

port. 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 unconned space, remove door to adjoin-

ing room or add ventilation grills between

rooms. See Ventilation Air From Inside

Building, page 7.

B. Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 7.

C. Install a lower Btu/Hr heater, if lower Btu/Hr

size makes room unconned.

If the actual Btu/Hr used is less than the maxi-

mum Btu/Hr the space can support, the space is

an unconned space. You will need no additional

fresh air ventilation.

WARNING:Ifthe areainwhich

     

    

     

    







in the National Fuel Gas Code,

ANSI Z223.1/NFPA54 Section 5.3



VENTILATION AIR



This fresh air would come from an adjoin-

ing unconned space. When ventilating to

an adjoining unconned space, you must

provide two permanent openings: one within

12" (30.5 cm) of the ceiling and one within

12" (30.5 cm) of the oor on the wall con-

necting the two spaces (see options 1 and 2,

Figure 2, page 7). You can also remove door

into adjoining room (see option 3, Figure 2,

page 7). 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.

40,000

20,000

60,000

www.desatech.com 7119171-01E

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation

grills or ducts. You must provide two perma-

nent openings: one within 12" (30.5 cm) of

the ceiling and one within 12" (30.5 cm) of

the oor. Connect these items directly to the

outdoors or spaces open to the outdoors.

These spaces include attics and crawl

spaces. 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.

IMPORTANT: Do not provide openings for

inlet or outlet air into attic if attic has a thermo-

stat-controlled power vent. Heated air entering

the attic will activate the power vent.

AIR FOR COMbUSTION

AND VENTILATION

Continued

Figure 2 - Ventilation Air from Inside

Building

Figure 3 - Ventilation Air from Outdoors

INSTALLATION

NOTICE: This heater is intended

    





     -

















    -







Use only the correct type of gas (natural or

propane/LP). If your gas supply is not the

correct gas type, do not install heater. Call

dealer where you bought heater for proper

type heater.







-





Remove

Door into

Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option 2

12"

Ventilation

Grills into

Adjoining

Room,

Option 1

Outlet

Air

Ventilated

Attic

Outlet

Inlet

Air

Inlet Air Ventilated

Crawl Space

Crawl

Space

To Attic

www.desatech.com 119171-01E8

CAUTION: If you install the



•





    

vehicle will not hit it

CAUTION: This heater cre-

    

currents move heat to wall sur-

    

heater next to vinyl or cloth wall

   





-



the air exist, may discolor walls



IMPORTANT: Vent-free heaters add moisture to

the air. Although this is benecial, installing heater

in rooms without enough ventilation air may cause

mildew to form from too much moisture. See Air for

Combustion and Ventilation, page 5. If high humid-

ity is experienced, a dehumidier may be used to

help lower the water vapor content in the air.

For convenience and efciency, install heater

• where there is easy access for operation,

inspection and service

• in coldest part of room

To use fan, locate heater near an electrical

outlet.

INSTALLATION

Continued

Figure 4 - Mounting Clearances As

Viewed From Front of Heater

Minimum

From

Sides Of

Heater

2" (5.1 cm)

FLOOR

CEILING

36"

(91.5 cm)

Minimum

Minimum To

Top Surface

Of Carpeting,

Tile Or Other

Combustible

Material

Left

Side

Right

Side

10" (25.4 cm)

INSTALLATION ITEMS

Before installing heater, make sure you have

the items listed below.

• for propane/LP gas, external regulator

(supplied by installer)

• piping (check local codes)

• sealant (resistant to propane/LP gas)

• equipment shutoff valve *

• ground joint union

• sediment trap

• tee joint

• pipe wrench

• for natural gas, test gauge connection*

• hardware packet

- wall anchor (4) 095112-02

- red key (1) 095116-01

- pan head screw, black (4) 097403-02

- nylon spacer (2) 099064-02

- clamp (1) 099123-01

- Phillips head screw, silver (4) 100159-02

* A CSA design-certied equipment shutoff valve

with 1/8" NPT tap is an acceptable alternative to

test gauge connection. The optional CSA design-

certied equipment shutoff valve can be purchased

from your dealer. See Accessories, page 26.

LOCATING HEATER

This heater is designed to be mounted on a wall.

WARNING: Maintain the

minimum clearances shown



   



You can locate heater on oor, away from

a wall. An optional oor mounting stand is

included.

WARNING: Never install the

heater

 

• in a recreational vehicle

• where curtains, furniture,



    



or sides of the heater

 

 

• in windy or drafty areas

www.desatech.com 9119171-01E

THERMOSTAT SENSING BULB

Locate thermostat sensing bulb.

1. Place clamp on thermostat sensing bulb

as shown in Figure 5. Clamp is provided

in hardware package.

2. 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 sensing

bulb is pointing up.



1. Remove the four painted screws, two on

each side of front panel.

Pull bottom of front panel forward, then out.

3. Remove any remaining packaging ma-

terials.

Figure 6 - Mounting Bracket

Figure 7 - Removing Front Panel Of

Heater

Screw

Front Panel

INSTALLATION

Continued



To Wall

Only use last hole on each end of mounting

bracket to attach bracket to wall. These two

holes are 14" (35.6 cm) apart from their cen-

ters. Attach mounting bracket to wall in one

of two ways:

1. Attaching to wall stud

2. Attaching to wall anchor

This method provides

the strongest hold. Insert mounting screws

through mounting bracket and into wall studs.

This method al-

lows you to attach mounting bracket to hollow

walls (wall areas between studs) or to solid

walls (concrete or masonry).

Decide which method better suits your needs.

Either method will provide a secure hold for

the mounting bracket.



1. Tape mounting bracket to wall where

heater will be located. Make sure mount-

ing bracket is level.

WARNING: Maintain mini-



     

-



Mark screw locations on wall (see Figure 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.

INSTALLING HEATER TO WALL



Locate mounting bracket in heater carton. Re-

move mounting bracket from heater carton.

Figure 5 - Attaching Thermostat Sensing

Bulb

Clamp

Thermostat

Sensing Bulb

Figure 8 - Mounting Bracket Clearances

(47.6 cm)

Min.

16"

(40.6 cm)

Min.

14" (35.6 cm)

(47.6 cm)

Min.

12"

(30.4

cm)

Min.

Adjoining Wall

14" (35.6 cm)

Adjoining Wall

Only Insert Mounting

Screws Through Last

Hole On Each End

Only Insert Mounting

Screws Through Last

Hole On Each End

Floor Floor



Note: Wall anchors, mounting screws and

spacers are in hardware package. The hard-

ware package is provided with heater.

www.desatech.com 119171-01E10

Side View

Front View

INSTALLATION

Continued

Figure 11 - Mounting Heater Onto

Mounting Bracket

Mounting

Bracket

(attached

to wall)

Horizontal Slots

Stand-Out Tab



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 heater from mounting bracket.

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.

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.

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 rmly

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 page 11-13).

Figure 12 - Installing Bottom Mounting

Screws

Wall

Spacer

Heater



For attaching mounting bracket to wall studs

1. Drill holes at marked locations using 9/64"

drill bit.

2. Place mounting bracket onto wall. Line

up last hole on each end of bracket with

holes drilled in wall.

3. Insert mounting screws through bracket

and into wall studs.

4. Tighten screws until mounting bracket is

rmly fastened to wall studs.



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. For solid walls (concrete or

masonry), drill at least 1" (2.5 cm) deep.

2. Fold wall anchor as shown in Figure 10.

3. Insert wall anchor (wings rst) into hole.

Tap anchor ush to wall.

4. For thin walls [1/2" (1.3 cm) or less], insert

red key into wall anchor. Push red key to

“pop” open anchor wings. IMPORTANT:

Do not hammer key! For thick walls [over

1/2" (1.3 cm) thick] or solid walls, do not

pop open wings.

5. Place mounting bracket onto wall. Line up

last hole on each end of bracket with wall

anchors.

6. Insert mounting screws through bracket

and into wall anchors.

7. Tighten screws until mounting bracket is

rmly fastened to wall.

Figure 9 - Folding

Anchor

Figure 10 - Popping

Open Anchor Wings

For Thin Walls



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.

This manual suits for next models

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