Desa Vanguard GVC50NA Quick start guide

Save this manual for future reference.

WARNING: If the information in this manual

is not followed exactly, a fire or explosion

may result causing property damage, per-

sonal injury, or loss of life.

FOR YOUR SAFETY

— 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.

• Immediatelycallyourgassupplierfrom

a neighbor’s phone. Follow the gas

supplier’s instructions.

• If you cannot reach your gas supplier,

call the fire department.

— Installation and service must be per-

formed by a qualified installer, service

agency, or the gas supplier.

WARNING: Improper installation,

adjustment, alteration, service, or

maintenance can cause property

damage, personal injury or loss of

life. Refer to this manual for cor-

rect installation and operational

procedures. For assistance or

additional information consult a

qualified installer, service agency,

or the gas supplier.

OWNER’S OPERATION AND INSTALLATION MANUAL

VENTED NATURAL

GAS HEATERS

Models: GVC65NA, GVC50NA, GVC35NA

100749

CONTENTS SECTION PAGE

Safety Information.........................................................................3

Product Identification .................................................................... 5

Local Codes ...................................................................................6

Unpacking ....................................................................................6

Product Features ............................................................................ 6

Installing Heater ............................................................................ 6

Check Gas Type...................................................................... 6

Installation Items..................................................................... 6

Locating Heater....................................................................... 7

Venting Heater ........................................................................ 8

Connecting to Gas Supply ...................................................... 11

Checking Gas Connections..................................................... 13

Fresh Air For Combustion and Ventilation...................................14

Determining Fresh-Air Flow for Heater Location

Example 1: Locating Heater in Unconfined (Open) Area 15

Draft Hood Spillage Test............................................ 15

Providing Permanent Fresh-Air Ventilation ..............16

Example 2: Locating Heater in Confined (Closed) Area..17

Ventilating Confined Area .........................................17

Operating Heater ...........................................................................18

For Your Safety Read Before Lighting ..................................18

Lighting Instructions............................................................... 18

Manual Lighting Procedure ....................................................20

Blower Operation (For Models with Blower) ........................20

To Turn Off Gas To Appliance .............................................. 20

Inspecting Pilot and Burner Flame................................................ 21

Pilot Flame Pattern..................................................................21

Burner Flame Pattern ..............................................................21

Cleaning and Maintenance ............................................................ 23

Troubleshooting............................................................................. 24

Service Procedures ........................................................................ 28

Removing Control Valve and Burner Tube............................28

Removing Burner.................................................................... 29

Changing Burner Orifice ........................................................ 30

Blower Wiring Diagram................................................................ 30

Technical Service .......................................................................... 31

Specifications ................................................................................ 31

Service Hints ................................................................................. 31

Accessories ....................................................................................31

Ordering Replacement Parts.......................................................... 32

Parts Centrals................................................................................. 32

Illustrated Parts List ...................................................................... 33-35

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

100749

SAFETY

INFORMATION WARNINGS

IMPORTANT: Read this owner’s manual carefully and completely be-

foretrying toassemble,operate, orservice thisheater. Improperuse of

thisheatercancauseseriousinjuryordeathfromburns,fire,explosion,

electrical shock, and carbon monoxide poisoning.

DANGER

Carbon monoxide poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning

resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the

heater may not be operating or venting properly. Getfresh airat once!Have heater

or heater venting system serviced. Some people are more affected by carbon

monoxide than others. These include pregnant women, people with heart or lung

disease or anemia, those under the influence of alcohol, and those at high altitudes.

NaturalGas: Naturalgasisodorless.Anodor-makingagentisaddedtonaturalgas.

The odor helps you detect a natural gas leak. However, the odor added to natural gas

can fade. Natural gas may be present even though no odor exists.

Makecertain you read and understandallWarnings.Keepthis manual for reference.

It is your guide to safe and proper operation of this heater.

1. A qualified service person must install heater and venting system.

2. Use only natural gas. Do not convert heater to use different fuel type.

3. 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 fire department.

4. Thisheatermusthave fresh air for proper operation. If not, poor fuel combustion

andimproperventingoffluegases will result. Carbon monoxide poisoning from

backed-up flue gases could occur. The State of California lists carbon monoxide

asareproductivetoxinunderProposition65.ReadtheinstructionsunderFreshAir

for Combustion and Ventilation, pages 14 through 17 for complete information.

5. Never install the heater

• in a mobile home or a recreational vehicle.

• where curtains, furniture, clothing, or other flammable objects are less than 48

inches from the front, 53 inches from top, or 12 inches from right side and 6

inches from left side and back of heater.

• directly on carpeting, tile, or other combustible materials other than wood

flooring. Place heater on metal or wood panel extending the full width and

depth of heater.

• as a fireplace insert.

• in high traffic areas.

• in windy or drafty areas.

Continued

100749

SAFETY

INFORMATION

Continued

WARNINGS

Continued

6. Providethe following minimum heater clearances from combustibles (as viewed

from the front of heater):

Front: 48 inches

Back: 6 inches

Top: 53 inches

Right Side: 12 inches

Left Side: 6 inches

7. Do not run heater

• where flammable liquids or vapors are used or stored

• under dusty conditions

8. Never place clothing or any flammable objects on the heater or venting system.

9. Heater and venting system surfaces are very hot during operation. Keep children

and adults away from hot surfaces to avoid burns or clothing ignition. Carefully

supervise young children when they are in the same room as heater. Heater will

remain hot for a time after shutdown. Let surface cool before touching.

10. Do not use heater as a cooking device.

11. Do not alter heater or its controls. Any change may create a safety hazard.

12. Turn off heater and unplug (if equipped with blower) and let cool before

servicing. Unless you need gas supply for testing, shut off manual shutoff valve

beforeservicing. Onlyaqualified service personshouldservice and repairheater

and venting system.

13. Replace any safety screen or guard removed for servicing before running heater.

14. Do not use heater if any part has been under water. Immediately call a qualified

servicepersontoinspecttheheaterandtoreplaceanypartofthecontrolsystemand

any gas control which has been under water.

100749

PRODUCT

IDENTIFICATION

Figure 1 - Vented Natural Gas Heater

Lower Front

Access Panel

Ignitor

Button

Control

Knob

Figure 2 - Vented Natural Gas Heater, Rear View

Draft Hood

Outlet for

Venting

System

Blower

(on models

equipped with

blower)

Control

Valve

100749

Install and use heater with care. Follow all local codes. In the absence of local

codes, use the latest edition of the following:

• National Fuel Gas Code ANSI Z223.1, also known as NFPA 54 *

• National Electrical Code ANSI/NFPA 70 *

• National Standard of Canada CAN1-B149 **

*Available from: American National Standards Institute, Inc., 1430 Broadway,

New York, NY 10018; or National Fire Protection Association, Inc., Batterymarch

Park, Quincy, MA 02269

**Available from: Standards Council of Canada, 350 Sparks Street, Ottawa,

Ontario, K1R 7S8

LOCAL CODES

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 inform

dealer where you bought heater.

NOTICE

Thisheatermustbeelectricallygroundedifequippedwith

blower. Follow all local codes. In the absence of local

codes, follow the National Electric Code, ANSI/NFPA 70

(U.S.) or Canadian Electrical Code CSA C22.1 (Canada).

INSTALLING

HEATER WARNING

A qualified service person must install heater and

venting system. Have them inspect heater before use

and at least annually. Follow all local codes.

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install heater.

Call dealer where you bought heater for proper type heater.

INSTALLATION ITEMS

Before installing heater, make sure you have all items below.

* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an

acceptable alternative to test gauge connection. Purchase the optional A.G.A.

design-certified manual shutoff valve from your dealer. See Accessories, page 31.

• piping (check local codes)

• sealant (resistant to propane gas)

• manual shutoff valve *

• ground joint union

• test gauge connection * (see

Figure 7, page 12)

• sediment trap

• tee joint

• pipe wrench

• venting materials

PRODUCT

FEATURES

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 a control valve. This results in the

greatest heating comfort. This can also result in lower gas bills.

100749

INSTALLING

HEATER

Continued

LOCATING HEATER

WARNING

Maintain the minimum clearances shown in Figure 3,

below. If you can, provide greater clearances.

WARNING

Never install the heater

•in a mobile home or a recreational vehicle.

•where curtains, furniture, clothing, or other flam-

mable objects are less than 48 inches from the front,

53 inches from the top, 12 inches from the right side

and 6 inches from the left side and back of heater.

•directly on carpeting, tile, or other combustible

materials other than wood flooring. Place heater on

metal or wood panel extending the full width and

depth of 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

•locate heater where moving vehicle will not hit it.

For convenience and efficiency, install heater

• where there is easy access for operation, inspection, and service.

• in coldest part of room.

• near an electrical outlet if heater has blower or if you are planning to add

blower to heater. See Accessories, page 31 for blower.

Figure 3 - Heater Clearances

53"

Minimum

CEILING

Left

Side

Minimum

Right

Side

48" Minimum from

Front of Heater

6" Minimum

from Back

12"

Minimum

Continued

100749

Note:

Venting/chimney materials are not supplied with heater.

VENTING HEATER

INSTALLING

HEATER

Continued

WARNING

When venting this heater, follow the safety information

listed below.

•Never vent heater to another room or inside a build-

ing. Only vent heater to the outdoors.

•Do not vent heater exhaust to a chimney or flue

serving another solid-fuel-burning or gas appliance.

•We recommend you use flues classified as prefabri-

cated or masonry all-fuel chimney or type-B vent. See

Vent Types,

page 10.

•If using old vent, check vent for soot, creosote, and

loose particles. If vent is damaged, repair or replace

it before using heater.

•Extend the vertical section of vent pipe at least three

feet above roof penetration.

•Extend the vertical section of vent pipe at least two

feet above the highest point of any roof within ten

feet.

•The horizontal run of vent pipe should rise at least

1/4 inch for each foot of run.

•Support the vent pipe at least every five feet along its

length. Do not use combustible materials to support

vent pipe.

•Never extend vent pipe horizontally through outside

wall and terminate. You must connect a vertical run

of vent pipe to the horizontal run. The vertical run

must be at least 25% longer than the horizontal run.

•Install vent or chimney cap that is approved for use

with vented gas room heaters.

•Do not use vent pipe smaller in diameter than that of

the heater draft hood outlet.

•Do not use dampers in the vent pipes.

•Vertical height of vent must be greater than five feet

above vent connection at draft hood.

WARNING

A qualified service person must install the venting system

for this heater. If venting system is not properly installed

and maintained, the vent safety shut-off system will pre-

vent the heater from running. Follow all local codes.

WARNING

This heater has a vent safety shut-off system. This

system shuts off the heater gas supply if you do not

vent heater properly or the venting system is blocked.

Do not operate heater if not properly vented. Do not

tamper with the vent safety shut-off system. Carbon

monoxide poisoning and death may result.

100749

INSTALLING

HEATER

Continued

VENTING HEATER

(continued)

WARNING

Do not vent heater in any of the following ways (see Figure 4).

Heater must be vented to the out-

doors. Never vent heater to another

room or inside a building.

The vertical section of vent pipe must

extend at least two feet above the

highest point of any roof within ten

feet.

Never extend vent pipe horizontally

through outside wall and terminate.

You must connect a vertical run of

vent pipe to the horizontal run. The

vertical run must be at least 25%

longer than the horizontal run.

Never extend vent pipe horizontally

through a chimney or flue. You must

connect a vertical run of vent pipe to

the horizontal run. The vertical run

must be at least 25% longer or five

feet minimum than the horizontal run.

Vertical run of pipe must be at least

five feet from elbow to elbow.

Figure 4 - Improper Venting Systems

Continued

;

;;

Less than 5' between elbows

100749

VENTING HEATER

(continued)

INSTALLING

HEATER

Continued

Proper Size Vent

To safely vent heater, the vent connector pipe must be the same diameter as the draft

hood outlet on the rear of the heater. Pipe that is too small can cause flue gas to spill

fromtheheater.Fastenventconnectortothedrafthoodoutletwithasheetmetalscrew.

Vent Types

Prefabricated or Masonry All-Fuel Chimney - This is a masonry chimney or a

residential-type prefabricated chimney. Only use prefabricated chimneys listed by

Underwriters Laboratories (UL), Inc.

Type-B Vent - These vents are made of noncombustible, corrosion resistant

material. They are certified by a nationally recognized testing agency. Type-B

vents are double-walled pipe. Clearances to combustible construction must be in

accordance with the listing of the particular type-B vent. Type-B vents are cur-

rently listed as B-1, B-1 1/2, and B-2.

The illustrations below show both vent types. The illustration shows typical

construction of each type of venting system. Minimum clearances and lengths are

added to the illustrations.

Figure 5 - Typical Construction of Venting Systems

Min. 6"

Min.

Heater

Vent

Connector

Lock Joints

Vertical Vent

53"

Min.

Maintain Listed

Clearance of

Vent

Lock Joints

Position

Firestop Support

Laterals

Lock

Joints

Support If

Necessary

Maintain Listed

Clearance of Vent

Vent Cap

Must Be At

Least 2 Feet

Above

Highest Point

Within 10

Feet.

Seal Around

Collar and

Flashing

Type-B Vent

Prefabricated or Masonry

All-Fuel Chimney

Heater

Terminate at least 5' above draft hood. If vent extends over

5' above roof, support with guy wires or braces.

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