USSC Cavalier A9740L Installation And Operation Instructions Manual Download Page 1

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UNITED STATES STOVE COMPANY

Propane (LPG) Model

A9740L

C9740L

G9740L

Natural Gas Model

A9740N
C9740N

G9740N

VENT-FREE PEDESTAL GAS HEATER

 INSTALLATION AND OPERATION INSTRUCTIONS

WARNINGS

WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury 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.

Installation and service must be performed by a qualified
installer, service agency or the gas supplier.

THIS APPLIANCE MAY BE INSTALLED IN
AN AFTERMARKET* MANUFACTURED
(MOBILE) HOME, WHERE NOT
PROHIBITED BY STATE OR LOCAL
CODES.

*Aftermarket:  Completion of sale, not

for purpose of resale, from the
manufacturer.

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.

This is an unvented gas-fired heater.  It uses
air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and
ventilation air must be provided.  Refer to
"Adequate Combustion And Ventilation Air"
on page 6 of this manual.

WARNING: Do not use a blower insert, heat
exchanger insert or other accessory not approved
for use with this heater.

851227C    9/98

227 Industrial Park Road • P.O. Box 151 • South Pittsburg, TN 37380 • (423) 837-2100

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Summary of Contents for Cavalier A9740L

Page 1: ...re department Installation and service must be performed by a qualified installer service agency or the gas supplier THIS APPLIANCE MAY BE INSTALLED IN AN AFTERMARKET MANUFACTURED MOBILE HOME WHERE NOT PROHIBITED BY STATE OR LOCAL CODES Aftermarket Completion of sale not for purpose of resale from the manufacturer THIS APPLIANCE IS ONLY FOR USE WITH THE TYPE OF GAS INDICATED ON THE RATING PLATE TH...

Page 2: ...15 16 PARTS LIST FOR BURNER LOG ASSEMBLY 17 18 TROUBLE SHOOTING 19 20 OPTIONAL EQUIPMENT 21 NOTE 22 LIMITED WARRANTY POLICY 23 NOTICE Installation and repair must be done by a qualified service person The appliance should be inspected before use and at least annually by a professional service person More frequent cleaning may be required due to excessive lint from carpet ing bedding material etc I...

Page 3: ... qualified installer service agency or the gas supplier To prevent malfunction and or sooting an unvented gas heater should be cleaned at least annually by a professionalserviceperson Morefrequentcleaningmayberequiredduetoexcessivelintfromcarpeting etc It is imperative that control compartments burners and circulating air passageways be kept clean Correctplacementoftheceramicfiberlogsisnecessaryto...

Page 4: ... disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1 2 psig 3 5 kPa The heater must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 psig 3 5 kPa Do not use this room heater if any ...

Page 5: ...sition to light maintain a standing pilot 4 ON Gas flow to complete system front burner ignition Front Burner Control Knob Infinite control rotate clockwise to minimum rate and counter clockwise for maximum rate Rear Burner Control Knob Has 3 positions 1 OFF Gas to rear burner is shutoff at control 2 ON MAX Maximum gas flow to rear burner 3 MIN Minimum gas flow rate to rear burner GLOVES ARE RECOM...

Page 6: ...ss than 50 cubic feet per 1 000 BTU per hour 4 8m per 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 unconfined space ITEMS REQUIRED FOR INSTALLATION ITEMS REQUIRED FOR INSTALLATION Ensure that the following items are a...

Page 7: ...tending the full width and depth of the appliance WARNING If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code ANSI Z223 1 Section 5 3 or applicable local codes L2 12 L1 15 1 2 W 12 H 8 Min...

Page 8: ... steel pipe only Internally tinned copper tubing can be used in some areas when permitted by local codes Only use pipe of 1 2 or greater diameter to allow full gas volume to heater Excessive pressure loss will occur if the pipe is too small A manual shutoff valve union and plugged 1 8 NPT pressure tapping point must be installed upstream of the heater FIGURE 5 A sediment trap must be installed ups...

Page 9: ...ring If the pressure is not as specified in Product Specifications Page 5 contact your dealer and replace the regulator FIGURE 7 Pressure Test Point Location Control Valve Control Bracket Rightside view facing heater Test Pressure Input Test Pressure Output Gas Inlet Connection 3 8 NPT FIGURE 6 Rear View of 9740 Vent Free Gas Heater The gas inlet connection is 3 8 NPT made at the rear of the main ...

Page 10: ...t handle these logs with your bare hands Always wearglovestopreventskinirritationfromceramicfibers Afterhandlinglogs washyourhandsgentlywithsoapand water to remove any traces of fibers PROPER INSTALLATION SEQUENCE 1 Installtherearlog 2 ontherearsetoflocators Visuallychecktoverifythelogissecurelyplacedonthelocators 2 Install the front log 1 on the front locators Visually check to verify the log is ...

Page 11: ...GHTING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS Do not attempt to light any appliance Do not touch any electric switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot...

Page 12: ...orandturnonelectricalpower OPERATING INSTRUCTIONS LIGHTING INSTRUCTIONS 1 Open access door 2 Set front burner to Min and turn off the rear burner by depressing knob and rotating clockwise until stop 3 Unplug all electric power optional blower if service is to be performed 4 Push in gas control knob slightly and turn clockwise to OFF Do not force 5 Close access door TURN OFF GAS TO APPLIANCE 1 STOP...

Page 13: ...r you can light the pilot with a match First locate the pilot The pilot islocatedbetweenthetwoburnertubesontherightend facingtheunit insidethefirebox Tolightpilotwithamatch move the gas control knob 1 pg 12 to the pilot position and hold down Light match and place near pilot Once pilot is lit continue to hold the knob for about ten seconds Then follow steps 7 thru 10 on page 12 PILOT FLAME The pil...

Page 14: ... Inspection Inspect and clean burner air intake holes Inspect and clean all burner ports Inspect ODS pilot for operation and accumulation of lint at air intake holes Verify flame pattern and log placement for proper operation FLAME APPEARANCE Verify smooth and responsive ignition of main burner and rear burner In normal operation at full rate after 15 minutes the following flame appearance should ...

Page 15: ...15 HEATER ASSEMBLY REPLACEMENT PARTS 1 2 3 4 5 6 7 8 11 10 9 12 13 ...

Page 16: ...7 69084 PEDESTAL WELDMENT 1 8 24455 PEDESTAL BASE 1 9 24457 CONTROL DOOR 1 10 89899 BRASS KNOB 1 11 83323 8 32 x 3 8 PH MACHINE SCREW 1 12 24536 FRONT SCREEN PAINTED 1 13 89825 BRASS TRIM 2 N S 89824 MAGNETIC LATCH 1 N S 83172 10A x 1 2 HX W SM SCREWS 58 IMPORTANT NOTICE WHEN ORDERING CABINET PARTS PLACE THE APPROPRIATE CODE AFTER THE PART NUMBER THAT CORRESPONDS TO THE COLOR OF YOUR UNIT ALMOND A...

Page 17: ...17 BURNER LOG ASSEMBLY 5 16 15 6 8 9 2 3 7 4 10 11 17 1 19 18 A B C D 20 13 14 12 ...

Page 18: ...ON SLEEVE 1 11 24612 PILOT BRACKET 1 12 89872 O P AMERICA NAT PILOT 1 89873 O P AMERICA L P PILOT 1 N S 83437 8 1 2 HX HD SCREW TO MOUNT PILOT 2 13 89841 3 16 COMPRESSION NUT 1 14 89842 3 16 COMPRESSION SLEEVE 1 15 89829 47 NATURAL BURNER ORIFICE FRONT 1 89836 55 L P BURNER ORIFICE FRONT 1 16 89830 48 NATURAL BURNER ORIFICE REAR 1 89836 55 L P BURNER ORIFICE REAR 1 17 24613 BURNER PAINTED 2 18 898...

Page 19: ... ventilation Contact local gas company Appliance shuts off in use ODS Pilot is partially clogged Gas leak Clean ODS Pilot Locate and correct all leaks Gas odor even when control knob is in OFF position Control valve defective Gas supply turned off or manual shutoff valve closed Control knob not in PILOT position Control knob not pressed in while in Pilot position Air in gas lines when installed OD...

Page 20: ...y or partially clogged burner orifice LP regulator shut down due to inlet pressure too high Hand tighten until snug then tighten 1 4 turn more Contact local gas company Replace thermocouple Replace control valve Clean burner or replace burner orifice Replace burner orifice Contact qualified service person Contact local gas company Clean burner or replace burner orifice Clean burner or replace burn...

Page 21: ...T THIS OPTIONAL F40 BLOWER KIT IS AVAILABLE WHERE YOU PURCHASED THIS HEATER OR YOU CAN ORDER DIRECT FROM THE FACTORY BY CONTACTING THE PARTS DEPARTMENT AT THE NUMBER AND ADDRESS ON THE BACK PAGE OF THIS MANUAL BACK VIEW OF 9740 ...

Page 22: ...22 NOTES ...

Page 23: ...E INSTALLED BY A QUALIFIED INSTALLER in accordance with the instructions furnished with the unit The defective heater should be returned at your expense to the dealer from whom the product was purchased or an authorized service agent Any products presented for warranty repair must be accompanied by a dated proof of purchase Since some states do not allow the exclusion on limitation of incidental o...

Page 24: ...UR RECORDS 1 The PART NUMBER 2 The PART DESCRIPTION 3 The MODEL NUMBER 9740N 9740L 4 The SERIAL NUMBER THIS MANUAL WILL HELP YOU TO OBTAIN EFFICIENT DEPENDABLE SERVICE FROM THE FURNACE AND ENABLE YOU TO ORDER RE PAIR PARTS CORRECTLY KEEP IN A SAFE PLACE FOR FUTURE REFERENCE WHEN WRITING ALWAYS GIVE THE FULL MODEL NUMBER WHICH IS ON THE NAMEPLATE ATTACHED INSIDE THE FRONT OF THE HEATER WHEN ORDERIN...

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