COZY C255H Owner's Manual And Installation Instructions

COZY C255H Owner's Manual And Installation Instructions

Top vent gravity gas wall heater
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OWNER'S MANUAL AND INSTALLATION INSTRUCTIONS
TOP VENT
SINGLE SIDED MODEL NUMBERS
(natural gas)
C255H / C355H
(propane gas)
C256H / C356H
DOUBLE SIDED MODEL NUMBERS:
(natural gas)
C505H
(propane gas)
C506H
SAVE THIS MANUAL FOR FUTURE REFERENCE.
READ THIS OWNER'S MANUAL CAREFULLY BEFORE YOU
INSTALL YOUR NEW Cozy WALL FURNACE.
WARNING: Do not install any of these furnaces (natural
or propane gas) in mobile/manufactured homes, trucks or
recreational vehicles.
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.
Cozy Heating Systems | cozyheaters.com | 888-444-1212 | 250 West Laurel Street | Colton, CA 92324
GRAVITY GAS WALL HEATER
25,000 - 35,000
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.
50,000 BTU/hr.

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Summary of Contents for COZY C255H

  • Page 1 Refer to this manual. For assistance or for additional qualified installer, service agency or the gas supplier. information consult a qualified installer or, service agency. Cozy Heating Systems | cozyheaters.com | 888-444-1212 | 250 West Laurel Street | Colton, CA 92324...
  • Page 2: Installation Record

    The manufacturer, Williams Comfort Products, warrants this Some states do not allow limitation on how long an implied Cozy wall furnace or heater to the original purchaser under the warranty lasts, and some states do not allow the exclusion or...
  • Page 3: Table Of Contents

    INSTALLING YOUR BLOWER ACCESSORY HOW TO CARE FOR YOUR FURNACE INSTALLING YOUR MOTORIZED REAR OUTLET ACCESSORY PART NUMBERS FOR THE C255H / C256H / C355H / C356H MODELS CONTROL ASSEMBLY REPLACEMENT PARTS C255H / C256H / C355H / C356H MODELS...
  • Page 4 7. The flow of this air to the furnace must not be blocked. 10. NEVER vent flue gases into another room, a fireplace or any space inside a building. This could cause property damage, bodily injury or death. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 5 Do not operate a summer exhaust fan. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 6: Basic Materials Needed

    In Canada: CSA C22.1 Canadian Electrical Code. American National Standard Z223.1 or current edition of the "National Fuel Gas Code." Obtain from the American National Standard Institute, Inc., 1430 Broadway, New York, NY 10018. In Canada, CAN/CGA B149. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 7 Do not locate the furnace where a door could swing over the front panel or where circulation could be retarded by furniture or cabinets. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 8: Combustion & Ventilation Air

    3-inches in length and any other gashed burning appliance to their previous or height. conditions of use. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 9 CRAWL SPACE INTO STUD SPACE (match or smoke pen) HOLES IN BOTTOM ON BACK OF FURNACE INTO OPEN STUD DRAFT HOOD SPACE OR CRAWL SPACE OPENING (match or smoke pen) TYPICAL WATER HEATER WALL FURNACE COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 10 Each opening must have a free area of at least 100-square inches or 1-square inch per 1,000 BTU/hr. of input for all appliances combined. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 11: Contents 3 Installing Your Furnace

    FIGURE 5 - RECESSED WALL MOUNT INSTALLATION Recessed wall mount installation on models: B-W VENT C255H / C256H / C355H / C356H / C505H / C506H The maximum recess depth from rear of furnace forward BASE PLATE is 4 1/2-inches.
  • Page 12: Surface Mount Installation

    Ceiling plate spacers are not ceiling height. Maximum: 8 feet 9 inches, Minimum: included. Figure 7 7 feet 9 inches. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 13 19. NOTE: The panel recesses ¼-inch between the vertical edges of the enclosure. PLUMBERS TAPE FIGURE A B-W VENT PIPING HEADER PLATE FIGURE D STUD WALL SIDE RAIL SIDE RAIL GAS STUB LOCATIONS BASE PLATE PANEL COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 14 FLUE COLLAR GASKET GLUED TO THE HEADER GASKET UNDERSIDE. GASKET MAT4RIAL MUST NOT BLOCK THE FLUE EXTENSION. 50,000 BTU/hr. MODEL SERIES AND HEADER NOT SHOWN FLUE COLLAR GASKET NOT REQUIRED ON 500 MODEL SERIES COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 15: Vent Installation

    This product is design certified to ANSI Z21.86. It must be installed If an existing gas line is preventing the installation of a Cozy furnace, with a U.L. tested and listed type B approved vent and type a cut-out may be made using tin snips on one of the legs to clear this B/W approved vent Figure 8 Older style terracotta, transite existing gas line.
  • Page 16 Swing the plate outward; bend it back and forth to OUTLET break the top tabs. Use caution when handling sharp metal edges. CAUTION: Do not install rear outlet kit where grille may be blocked by a door, curtains, or any other obstruction. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 17: Gas Supply And Piping

    PROPANE 35,000 23,700 .069" PROPANE C505H NATURAL 50,000 36,900 .091" PIPE SIZE C506H PROPANE 50,000 36,900 .058" LENGTH OF PIPE FEET 3/4" 1" 1/2" 393,000 732,000 189,000 267,000 504,000 129,000 103,000 217,000 409,000 COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 18 Test for gas leakage when installation is complete. FIGURE 15 – PROPER PIPING PRACTICE 2 THREADS EXPOSED PROPER PIPE THREADING SEALANT THIN ENOUGH TO SHOW THREADS DAMAGED SEALANT THREADS PAST TIP INCORRECT THREADING SEALANT OVER-THREADED TOO THICK COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 19: Front Panel Installation

    FIGURE 17 – THERMOSTAT WIRING THERMOSTAT INSTALLATION (Sold Separately) Use Cozy thermostat P322016 or any millivolt thermostat. Current to the thermostat is supplied by the pilot generator. Do not connect it to electricity. Anticipator settings are not required. 1. Use of existing wire is acceptable if it is in a satisfactory location and the wire is in good condition.
  • Page 20: Start-Up Procedure

    This gives the seconds per cubic foot of gas being delivered to the furnace. 3. Assuming natural gas with a heating value of 1,000 BTU per cubic foot and 34-seconds per cubic foot used as COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 21: Safety Rules 4 Operating Your Furnace

    This is normal. No burner LAZY FLAME: adjustment is provided, or is necessary. (Figure 20). Long, soft yellow cones moving around in the combustion chamber lifting from ports (insufficient air). COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 22: For Your Safety, Read Before Lighting The Pilot

    STOP! Follow E in the safety information above. If you SAFETY hang tag (see below) hangs below the heat shield. don t smell gas, go to the next step. 7. Loosen wing nut and open the pilot observation door (if equipped). COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 23: Lighting The Pilot

    ON position. Flashback could occur. IMPORTANT: KEEP BURNER AND CONTROL COMPARTMENT CLEAN. WARNING: Due to high surface temperatures, keep children, clothing, furniture or any combustible material away from the furnace. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 24 A properly adjusted burner with nearly all gases will produce a flame which has clear blue cone having a bluish-red or bluish- violet outer mantle. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 25: Installing Your Blower Accessory

    FURNACE FACE PANEL CAUTION: Danger of property damage, bodily injury or death. Turn off electric power supply at the disconnect switch, fuse box or service panel before removing or working on the fan cabinet. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 26: Introduction 5 How To Care For Your Furnace

    HOW TO CARE FOR YOUR FURNACE FIGURE C - WIRING FOR MODEL 2901 FIGURE D - WIRING FOR MODEL 2907 COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 27: Installing Your Motorized Rear Outlet Accessory

    Use tin snips to cut the area away. A pilot hole may be needed to begin the first cut. Take care not to damage the combustion chamber directly behind the inner shield when making a pilot hole. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 28 INSTALLING YOUR MOTORIZED REAR OUTLET ACCESSORY FIGURE C - SURFACED MOUNTED INSTALLATION FIGURE D - SURFACED MOUNTED INSTALLATION FIGURE E - SURFACE MOUNTED INSTALLATION FIGURE F - WIRING COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 29: Part Numbers For The C255H / C256H / C355H / C356H Models

    PART NUMBERS FOR THE C255H / C256H / C255H / C256H MODELS SINGLE SIDED 1 IN. SIDE CLEARANCE NATURAL C255H C355H PROPANE C256H C356H REF. C255H C355H REPLACEMENT PART DESCRIPTION C256H C356H Face Panel 4918 4918 Front Heat Shield 9C216...
  • Page 30 EXPLODED VIEW & REPLACEMENT PARTS CHART COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 31: Control Assembly Replacement Parts C255H / C256H / C355H / C356H Models

    CONTROL ASSEMBLY REPLACEMENT PARTS C255H / C256H / C355H / C356H MODELS MODEL NUMBERS C255H C355H C256H C356H REF. REPLACEMENT PART DESCRIPTION C255H C355H C256H C356H Wire Assembly (Both Required) P321836/A P321836/A P321836/A P321836/A Valve P323011 P323011 P322660 P322660 Front Burner Bracket...
  • Page 32: Part Numbers For The C505H / C506H Models

    7A189 7A189 Pal Nut P285501 P285501 Header Insulation P310000 P310000 SHOWN Parts Bag 9A497 9A497 SHOWN Knob P332606 P332606 SHOWN Vent Limit Switch Bracket P322074 P322074 SHOWN Thermostat not included with these models. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 33 EXPLODED VIEW & REPLACEMENT PARTS CHART COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 34: Control Assembly Replacement Parts C505H / C506H Models

    9B243 Manifold P323661 P323661 Burner Orifice (2 Required for 500 Series) P332625 P332623 Pilot/Generator Assembly P322396 P322397 Burner (2 Required for 500 Series) P323648 P323648 Electrode P322155 P322155 Pilot Mounting Plate 9A409 9A409 COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 35: Blower Accessory Model 2901 Parts

    Blower Body 9C102 Motor Mount Grommet (2) P321078 Strain Relief Bushing P012900 Fan Switch P323097 Screw - #8-18 x 1/2 P138200 Motor P320905 Fan Blade 9B99 Orifice Plate 9D12-1 Junction Box Cover 9B161 COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 36: Blower Accessory Model 2907 Parts

    Junction Box Cover 9A483 Fan Switch P323080 Blower Body 9B249 Heat Sensor Switch P323097 Use only manufacturer s authorized parts. NOTE: Nuts, bolts, screws, and washers are standard hardware items and may be purchased locally. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 37: Motorized Rear Outlet Replacement Parts

    Motor Housing Back Plate 9B266 9B284 Cord and Plug P323081 P323081 Bushing P323084 P323084 Use only manufacturer s authorized parts. NOTE: Nuts, bolts, screws, and washers are standard hardware items and may be purchased locally. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 38: Troubleshooting Your Furnace

    Adjust pilot flame. Pilot orifice may be plugged Pilot flame may be low or (check for spider webs or other material). blowing (high). Check for doorway and high movement areas. Drafts or drafty areas. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 39 If replacing the furnace, bring the vent pipe to the header. DO NOT raise the furnace to the vent pipe. Legs must be flat on the floor plate, never one in front of the other. COZY TOP VENT GRAVITY GAS WALL HEATER...
  • Page 40: Hints And Information

    Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and Cozy Heating Systems | cozyheaters.com | 888-444-1212 | 250 West Laurel Street | Colton, CA 92324 P323905_RV A 12/21 Subject to change without notice | © 2021...

This manual is also suitable for:

C355hC256hC356hC505hC506h

Table of Contents