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COZY CF352E Owner's Manual

Counterflow top vent gas wall heater, natural/propane gas
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OWNER'S MANUAL
INSTALLATION INSTRUCTIONS
COUNTERFLOW
TOP VENT GAS WALL HEATER
MODEL NUMBERS: (natural gas)
CF352E/CF502E
MODEL NUMBERS: (propane gas)
CF351E/CF501E
SAVE THIS MANUAL FOR FUTURE REFERENCE.
READ THIS OWNER'S MANUAL CAREFULLY BEFORE YOU
INSTALL YOUR NEW COZY WALL FURNACE.
DISCONTINUED MODEL NUMBERS:
CF403D CF404D CF553D CF554D
WARNING: This product can expose you to
chemicals including epichlorohydrin which is known to
the State of California to cause cancer and birth defects
and/or other reproductive harm. For information go to
www.p65warnings.ca.gov
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury or
property damage. Refer to this manual. For assistance or
for additional information consult a qualified installer or,
service agency.
250 West Laurel Street, Colton CA 92324 • cozyheaters.com • 1-888-444-1212
VISITEZ NOTRE SITE WEB POUR LA VERSION FRANÇAISE DE CE MANUEL
VISITE NUESTRA PÁGINA WEB PARA LA VERSIÓN EN ESPAÑOL DE ESTE MANUAL
www.cozyheaters.com/product-literature/
35,000 - 50,000 BTU/hr.
WARNING: If the information in these instructions
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:
• Open all windows.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone or cell phone in your building.
• Extinguish any open flame.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach the gas supplier, call the fire
department.
– Installation and service must be performed by a
qualified installer, service agency or the gas supplier.

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Summary of Contents for COZY CF352E

  • Page 1 MODEL NUMBERS: (propane gas) CF351E/CF501E SAVE THIS MANUAL FOR FUTURE REFERENCE. READ THIS OWNER’S MANUAL CAREFULLY BEFORE YOU INSTALL YOUR NEW COZY WALL FURNACE. DISCONTINUED MODEL NUMBERS: CF403D CF404D CF553D CF554D 35,000 - 50,000 BTU/hr. WARNING: This product can expose you to...

  • Page 2: Your Cozy Warranty

    WARRANTY The manufacturer, Williams Furnace Co., warrants this wall furnace Some states do not allow limitation on how long an implied or heater to the original purchaser under the following conditions: warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages, so the above ANY WARRANTY CONSIDERATIONS ARE CONTINGENT ON limitations or exclusions may not apply to you.

  • Page 3: Table Of Contents

    UNPACKING YOUR FURNACE INSTALLING YOUR WALL FURNACE HOW TO CARE FOR YOUR LOCATING WALL FURNACE AND THERMOSTAT FURNACE Learn how to keep your new Cozy COMBUSTION & VENTILATION AIR Furnace operating. INSTALLATION 7-19 RECESSED MOUNT INSTALLATION SURFACE MOUNT INSTALLATION...

  • Page 4: Safety Rules

    SAFETY RULES the building. Follow the venting instructions for your WARNING: Read these rules and the instructions type of installation exactly. Use only the type and size carefully. Failure to follow these rules and instructions of vent pipe and fittings specified. could cause a malfunction of the furnace.

  • Page 5: Introduction

    INTRODUCTION BASIC DESCRIPTION DO NOT convert the furnace from natural gas to propane The following steps are all needed for proper installation gas or from propane gas to natural gas without the proper and safe operation of your furnace. If you have any doubts manufacturer’s gas conversion kit.

  • Page 6: Basic Materials Needed

    INTRODUCTION Basic Tools Needed Optional Accessories Hand drill or properly grounded electric drill DIFFUSER GRILLE KITS 6703 & 6704  6703 let’s you route some heated air in a two-way direction. Expansion bit 1/2” to 1-5/8” or 1/2” and 1-1/2” blade bits ...

  • Page 7: Installing Your Wall Furnace

    INSTALLING YOUR FURNACE Locating Wall Furnace & Thermostat FIGURE 1 Consider the following points before attempting to install FAN BLADE the furnace: TOP FRONT PANEL CAUTION: Do not make cut-outs in the wall or ceiling FAN SHIELD before checking in the attic for ceiling joist locations THUMB SCREW SCREWS and proposed venting.

  • Page 8: Combustion & Ventilation Air

    INSTALLING YOUR FURNACE FIGURE 2 MINIMUM CLEARANCES FIGURE 3 MINIMUM CLEARANCES CEILING CLEARANCE 4" MIN. 1" MIN. WHEN OPTIONAL 4" MIN. WHEN ONE-WAY FRONT STANDARD DEFLECTING GRILLE GRILLE IS USED IS USED KIT 6704 1" KIT 6801 OPTIONAL TWO-WAY REAR GRILLE 4"...

  • Page 9: Air Requirements

    High humidity, especially during cold weather, may be EXAMPLE 1 damaging to buildings because condensation forms on FURNACE LOCATED IN UNCONFINED SPACE. windows and insde walls. An unconfined space must have a volume of a minimum The combination of a tight energy efficient home with 50 cubic feet per 1000 BTU/hr.

  • Page 10: All Air From Outdoors

    INSTALLING YOUR FURNACE FIGURE 4 – DRAFT HOOD SPILLAGE EXAMPLE 2 FURNACE LOCATED IN CONFINED SPACE VENT PIPE VENT PIPE If furnace is installed in a confined space, it must be provided DRAFT HOOD with free air for proper combustion and ventilation of flue OPENING (match or gases by one of the following methods.

  • Page 11: Installation

    INLET AIR pointing up. Make sure header plate is level. VENTILATED INLET AIR MODELS: CF351E/CF352E CRAWL SPACE Locate header plate between wall studs at 74 inches from finished floor and nail into position with end flanges Openings for inlet or outlet air should not be made into pointing up.
  • Page 12 INSTALLING YOUR FURNACE FIGURE 11 WARNING: Remove 4" x 14" fiberglass gasket from bottom of header plate and discard. This gasket is not used when the furnace is recessed in the wall. FIGURE 10 CLOSE OFF STUD SPACE (IF REQUIRED) If studs are not on 16 inch centers, cut the hole for the furnace next to an existing stud and frame in the other side using a 2 x 4 and spacer blocks as required.

  • Page 13: Surface Mount Installation

    FIGURE 13 - KNOCKOUT DIMENSIONS See Figure 13. If desired, the power supply and thermostat cable can come into the wall stud space from a basement, crawl space or an adjoining stud space. At selected location, drill a 1 inch hole for 115V power supply and a ½...

  • Page 14: General Vent Installation

    INSTALLING YOUR FURNACE General Vent Installation Fasten the hold-down plate or starter plate to the top of the header plate using holes “B” in the header plate. The vent installation must comply with all local codes and ordinances. If in doubt, consult your local codes or inspector. ALL MODELS The furnace vent must be directed to the outdoors so that harmful combustion gases will not collect inside the building.
  • Page 15 INSTALL SURFACE VENT (SURFACE MOUNT) FIGURE 17 - CEILING PLATE SPACERS NOTE For surface mounting, it will be helpful to complete the gas piping supply to the furnace before installing the vent pipe. See section GAS SUPPLY & PIPING, page 17. Carefully move the furnace into position under the ceiling cutout.

  • Page 16: Mounting Your Furnace

    INSTALLING YOUR FURNACE DISCONNECT WIRING Secure hold-down plate to vent pipe using two (2) screws. MODELS: CF35XX Using plumbers tape to secure vent to the plate spacer, nail through one (1) hole in each end of plate spacer, into the wall Remove the screws holding the ignition control unit and and ceiling plate.

  • Page 17: Gas Supply And Piping

    ALL MODELS Fasten furnace to floor through holes provided in furnace Make sure that the flue collar gasket, as shown on Figure bottom. If you have concrete flooring, use an alternate 18, is in place over the flue extension. Check to see if fastening method.

  • Page 18: Orifice Sizes

    INSTALLING YOUR FURNACE On natural gas the manifold pressure should be 4 inches FIGURE 22 – PROPER PIPING PRACTICE water column. The manifold pressure should be 10.5 inches water column for propane gas. See page 19 for 2 THREADS EXPOSED operation above 2,000 feet altitude.

  • Page 19: Electrical Wiring

    CHECKING THE GAS PIPING ELECTRICAL SUPPLY Test all piping for leaks. When checking gas piping to Remove three-prong (grounding) service cord from the the furnace with gas pressure less than 1/2 PSI, shut off envelope parts package to install in the furnace. Remove manual gas valve to the furnace.

  • Page 20: Thermostat Installation

    Thermostat Installation From the attic, feed the thermostat cable or a stiff wire through wall until even with thermostat location. Use Cozy thermostat 78355 or any 24 Snag thermostat cable through hole and pull cable volt thermostat. through hole in wall so that 6 inches of cable protrudes.

  • Page 21: Start Up Procedure

    START UP PROCEDURE Start the furnace using the procedures in section CHECK THE MANIFOLD GAS PRESSURE A tapped opening is provided in the gas valve to facilitate OPERATING YOUR FURNACE. measuring the manifold gas pressure. A “U Tube” manometer having a scale range from 0 to 12 inches of WARNING: Danger of bodily injury or death.

  • Page 22: Operating Your Furnace

    OPERATING YOUR FURNACE NOTE For models equipped with COZY gas valve P323209 or P322042 refer to this page 22 for “SAFETY & LIGHTING INSTRUCTION” and “TURN GAS OFF TO APPLIANCE.” On new installations, the gas lines will be filled with air and it may take several minutes to establish the pilot flame.

  • Page 23: What To Do If You Smell Gas

    OPERATING YOUR FURNACE IMPORTANT: KEEP BURNER AND CONTROL For your SAFETY, read before COMPARTMENT CLEAN. Make sure the “FOR YOUR SAFETY” LIGHTING hang tag (see below) hangs below the heat shield. FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

  • Page 24: To Turn Off Gas To Appliance

    HOW TO KEEP YOUR COZY FURNACE OPERATING How To Care For Your Furnace Wait five (5) minutes to clear out any gas, then smell for gas, including near the floor. If you then smell gas, WARNING: Danger of bodily injury or death.

  • Page 25: Burner Flame

    MAIN BURNER ORIFICE MODEL GAS TPE RATING BURNER CLEANING NUMBER DRILL DEC. QTY. BTU/hr. Check burner. If cleaning is required, contact a qualified service technician to clean and service burner. CF352E NATURAL 35,000 .106 CF351E PROPANE 35,000 .070 CF502E NATURAL 50,000 .093 WARNING: Danger of bodily injury or death.

  • Page 26: Installation Instructions

    Be sure this accessory is of the type and design required for use with your furnace. SUMMARY: This accessory converts the Cozy Counterflow A single speed motor is shown in the wiring diagram furnaces using the electric service cord provided, to a hardwired, permanent electrical connection.

  • Page 27: Wiring Diagrams

    WIRING DIAGRAMS MODELS - CF351E/ CF352E MODELS - CF501E/ CF502E COUNTERFLOW TOP VENT GAS WALL HEATER...

  • Page 28: Part Numbers For The Cf35Xe Model

    PART NUMBERS FOR THE CF35XE MODEL TOP VENT COUNTERFLOW NATURAL PROPANE CF352E CF351E REF. REPLACEMENT PART DESCRIPTION Outer Casing, Less Front Panel 12C10 Inner Liner 12B15 Heating Element 12C26 Bottom Front Panel 12B61 Top Front Panel 12B50 Fan Shroud 12B03-1...
  • Page 29 EXPLODED VIEW & REPLACEMENT PARTS CHART COUNTERFLOW TOP VENT GAS WALL HEATER...

  • Page 30: Control Assembly Replacement Parts

    CONTROL ASSEMBLY REPLACEMENT PARTS CF35XE MODELS STANDING PILOT MODEL NUMBERS NATURAL PROPANE REF. REPLACEMENT PART DESCRIPTION CF352E CF351E Valve, Natural Gas P323209 – Valve, Liquid Propane Gas – P322042 Manifold P323657 P323657 Orifice Fitting, Specify Model & Gas Type P090536...
  • Page 31 PART NUMBERS FOR THE CF50XX TOP VENT COUNTERFLOW NATURAL PROPANE CF502E CF501E REF. REPLACEMENT PART DESCRIPTION Outer Casing, Less Front Panel 7C55-2 Inner Liner 11B46 Heating Element 7C116 Relief Opening Pan 7B108 Top Front Panel 7B126 Center Front Panel 11C60 Switch Box 11B05 Limit Switch...

  • Page 32: Control Assembly Replacement Parts

    REF. REPLACEMENT PART DESCRIPTION Rear Grille, Two-Way, outer boot 10” long, 6801 inner boot 10 3/4” long Rear Grille, Two-Way, outer boot 7/8” long, 6802 inner boot 1 5/8” long Diffusing Grille Kit (Two-Way) 6703 Diffusing Grille Kit (One-Way) 6704 Side inner Boot, 10 3/4”...
  • Page 33 CONTROL ASSEMBLY REPLACEMENT PARTS CF50XE STANDING PILOT MODEL NUMBERS NATURAL PROPANE REF. REPLACEMENT PARTS DESCRIPTION CF502E CF501E Manifold P323656 P323656 Orifice Fitting, P090542 P332619 Specify Model and Gas (2 required) Valve, Natural Gas P323209 – Valve, Liquid Propane Gas – P322042 Thermocouple P233100...
  • Page 34 TROUBLESHOOTING YOUR FURNACE For qualified service technicians. ISSUE POSSIBLE CAUSE(S) CORRECTIVE ACTION 1. Pilot will not stay lit A. Thermocouple producing A. Check pilot flame – it must impinge on thermocouple. Pilot flame may after following lighting insufficient millivolts. be low or blowing (high) causing safety to drop out. Pilot orifice instructions.
  • Page 35 CORRECTIVE ACTION ISSUE POSSIBLE CAUSE(S) D. Loss of circulating air due D. Check header plate installation and proper use of gaskets. Repair to leakage. as necessary. 6. Furnace operates but turns A. Thermostat location. A. Check location of thermostat. It should not be in the path of warm air “OFF”...

  • Page 36: Installations In The State Of Massachusetts

    INSTALLATIONS IN THE STATE OF MASSACHUSETTS Meet ANSI/UL 2034 Standards and comply with All installations in the State of Massachusetts must use the following requirements when installing, maintaining NFPA 720 (2005 Edition); and Have been approved and listed by a Nationally or operating direct-vent propane or natural gas-fired space heaters.

  • Page 37: Hints And Information

    MODEL NUMBER MFG. DATE CODE PART NUMBER PART DESCRIPTION All parts listed herein may be ordered from your equipment supplier. The Model Number of your Cozy wall furnace will be found on the nameplate near gas valve, inside control compartment.

  • Page 38: Service Record

    SERVICE RECORD DATE MAINTENANCE PERFORMED COMPONENTS REQUIRED COUNTERFLOW TOP VENT GAS WALL HEATER...
  • Page 39 NOTES COUNTERFLOW TOP VENT GAS WALL HEATER...
  • Page 40 www.cozyheaters.com | 888-444-1212 | 250 West Laurel Street, Colton CA 92324 USA Subject to change without notice | © 2022 P323924_A 04/22...

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