Desa Tech CGB35P Owner's Operation And Installation Manual

[Page 1] Desa CGB35P

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...

[Page 2] Desa CGB35P

2 100352 CONTENTS SECTION PAGE Safety Information......................................................................... 3 Product Identification .................................................................... 5 Local Codes ......................

[Page 3] Desa CGB35P

3 100352 SAFETY INFORMATION WARNINGS IMPORTANT: Read this owner’s manual carefully and completely be- fore trying to assemble, operate, or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosi...

[Page 4] Desa CGB35P

4 100352 SAFETY INFORMATION Continued WARNINGS Continued 7. Provide the 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 in...

[Page 5] Desa CGB35P

5 100352 PRODUCT IDENTIFICATION Lower Front Access Panel Figure 1 - Vented Propane Gas Heater Draft Hood Outlet for Venting System Control Valve Figure 2 - Vented Propane Gas Heater, Rear View Ignitor Button Control Knob ...

[Page 6] Desa CGB35P

6 100352 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 * *Av...

[Page 7] Desa CGB35P

7 100352 INSTALLING HEATER Continued LOCATING HEATER WARNING ICON G 001 WARNING Maintain the minimum clearances shown in Figure 3, below. If you can, provide greater clearances. WARNING ICON G 001 WARNING Never install the heater • in a mobile ho...

[Page 8] Desa CGB35P

8 100352 Note: Venting/chimney materials are not supplied with heater. VENTING HEATER INSTALLING HEATER Continued 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 ...

[Page 9] Desa CGB35P

9 100352 INSTALLING HEATER Continued VENTING HEATER (continued) WARNING ICON G 001 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 bui...

[Page 10] Desa CGB35P

10 100352 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 ...

[Page 11] Desa CGB35P

11 100352 INSTALLING HEATER Continued CONNECTING TO GAS SUPPLY BULK PROPANE TANK VENT External Regulator Vent Pointing Down The installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce inc...

[Page 12] Desa CGB35P

12 100352 Figure 7 - Gas Connection * 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. ...

[Page 13] Desa CGB35P

13 100352 INSTALLING HEATER Continued CHECKING GAS CONNECTIONS Figure 8 - Manual Shutoff Valve P O On Position Off Position Pressure Testing Gas Supply Piping System Test Pressures In Excess of 1/2 PSIG 1. Disconnect heater and its individual manua...

[Page 14] Desa CGB35P

14 100352 INSTALLING HEATER Continued INSTALLING GLASS PANEL 1. Locate the glass panel package inside the back of the heater. WARNING ICON G 001 CAUTION Before installing glass panels, inspect the edges. If you notice any chips or cracks, do not i...

[Page 15] Desa CGB35P

15 100352 INSTALLING HEATER Continued 2 1 Glass Panel Lower Glass Retaining Channel Figure 11 - Inserting Top Edge of Glass Panel into Upper Glass Retaining Channel 2 1 Glass Panel Lower Glass Retaining Channel Upper Glass Retaining Channel Lower Fro...

[Page 16] Desa CGB35P

16 100352 FRESH AIR FOR COMBUSTION AND VENTILATION WARNING This heater must have fresh air for proper operation. If not, poor fuel combustion and improper venting of flue gases will result. Carbon monoxide poisoning from backed-up flue gases could o...

[Page 17] Desa CGB35P

17 100352 FRESH AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION Example 1: Locating Heater in Unconfined (Open) Area NOTICE An unconfined area has a minimum air volume of 50 cubic feet for each 1000 BTU/Hr ...

[Page 18] Desa CGB35P

18 100352 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re- leases poisonous carbon monoxide gas into your home. DANGER Carbon monoxide poisoning may lead to death! If draf...

[Page 19] Desa CGB35P

19 100352 FRESH AIR FOR COMBUSTION AND VENTILATION Continued Ventilation Grills into Closet for Hot Water Heater Recommended Fresh Air Duct into Crawl Space in Furnace Area or in Closet with Water Heater Ventilation Grills Connecting Two Rooms t...

[Page 20] Desa CGB35P

20 100352 OPERATING HEATER A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor bec...

[Page 21] Desa CGB35P

21 100352 5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information at the top of page 20. If you don’t smell gas, go to the next step. 6. Turn cont...

[Page 22] Desa CGB35P

22 100352 MANUAL LIGHTING PROCEDURE 1. Remove lower front access panel on heater. 2. Locate pilot. Pilot is attached to the front of burner. 3. Follow steps 1 through 6 under Lighting Instructions, pages 20 and 21. 4. With control knob depressed, str...

[Page 23] Desa CGB35P

23 100352 INSPECTING PILOT AND BURNER FLAME Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 18 shows a correct pilot flame pattern. Figure 19 shows an incorrect pilot flame pattern. The incorrect pilot flame is no...

[Page 24] Desa CGB35P

24 100352 INSPECTING PILOT AND BURNER FLAME Continued Sharp Blue Flame High Yellow Flame Flame Lifting Off of Burner Figure 21 - Incorrect Burner Flame Patterns Figure 20 - Correct Burner Flame Pattern If burner flame pattern is incorrect, as shown i...

[Page 25] Desa CGB35P

25 100352 CLEANING AND MAINTENANCE CABINET Air Passageways • Use a vacuum cleaner or pressurized air to clean. Exterior • Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust. COMBUSTION CHAMBER AND BURNER...

[Page 26] Desa CGB35P

26 100352 TROUBLE- SHOOTING Note: All troubleshooting items are listed in order of operation. WARNING Turn off and unplug heater and let cool before servicing. Unless you need gas supply for testing, shut off manual shutoff valve before servicing....

[Page 27] Desa CGB35P

27 100352 TROUBLE- SHOOTING Continued OBSERVED PROBLEM Pilot lights but flame goes out when control knob is released. Burner does not light after pilot is lit. Delayed ignition of burner. POSSIBLE CAUSE 1. Manual shutoff valve not fully open. 2. Cont...

[Page 28] Desa CGB35P

28 100352 TROUBLE- SHOOTING Continued OBSERVED PROBLEM Burner backfiring during combustion. Yellow flame during burner combustion. Slight smoke or odor during initial opera- tion. Burner fails to re- spond to thermostat. Heater produces a whistling n...

[Page 29] Desa CGB35P

29 100352 WARNING TROUBLE- SHOOTING Continued 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...

[Page 30] Desa CGB35P

30 100352 SERVICE PROCEDURES Removing Control Valve and Burner Tube 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 22). 4. Remove pilot gas line from control v...

[Page 31] Desa CGB35P

31 100352 SERVICE PROCEDURES Continued Removing Burner 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 23). 4. Remove orifice holder from burner (see Figure 23)...

[Page 32] Desa CGB35P

32 100352 SERVICE PROCEDURES Continued Changing Burner Orifice 1. Shut off gas supply to heater. 2. Remove lower front access panel on heater. 3. Disconnect burner tube from orifice holder (see Figure 24). 4. Remove orifice holder from burner (see Fi...

[Page 33] Desa CGB35P

33 100352 TECHNICAL SERVICE You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323- 5190. 35,000 BTU/Hr 50,000 BTU/Hr Model Model BTU 35,000 50...

[Page 34] Desa CGB35P

34 100352 Note: Use only original replacement parts. This will protect your warranty cover- age for parts replaced under warranty. Parts Under Warranty Contact your nearest dealer or call DESA International’s Technical Service De- partment at 1-80...

[Page 35] Desa CGB35P

35 100352 ACCESSORIES BLOWER KIT - PART NUMBER GA6010 For all models. Provides better heat distribution. Makes heater more efficient. Complete installation and operating instructions provided with blower. Purchase these heater accessories from your l...

[Page 36] Desa CGB35P

36 100352 ILLUSTRATED PARTS LIST Burner Assembly 3 4 8 10 11 1 2 5 6 7 9 12 13 14 15 16 17 18 19 28 27 7 35 Model 6 50 Model 11 24-2 20 21 23 26 22 17 16 4 24 24-1 24-3 24-4 25 7 ...

[Page 37] Desa CGB35P

37 100352 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 34 of this manual. PARTS LIST Burner Assembly KEY PART NUMBER FOR NO. CGB50P CGB35P DESCR...

[Page 38] Desa CGB35P

38 100352 ILLUSTRATED PARTS LIST Cabinet Assembly This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Ordering Replacement Parts on page 34 of this manual. 1 2 3 4 5 6 6 7 8 11 6 10 9 PA...

[Page 39] Desa CGB35P

39 100352 NOTES _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ ____________________________________...

[Page 40] Desa CGB35P

LIMITED WARRANTY COMFORT GLOW VENTED PROPANE GAS HEATERS LIMITED ONE YEAR WARRANTY This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and maintenance for a period of one year f...