Roberts Gorden CTH2-40 CTH2-60, CTH2-125, CTH2-80 Standard Reflector, inches, centimeters, Model

SECTION 3: CLEARANCES TO COMBUSTIBLES 3.1 Required Clearances to Combustibles

Clearances are the required distances that combusti- ble objects must be away from the heater to prevent serious fire hazards. Combustibles are materials that may catch on fire and include common items such as wood, paper, rubber, fabric, etc. Maintain clear- ances to combustibles at all times for safety.

Clearances for all heater models are located on the burner of the heater and on Page 5, Figure 3 through Page 8, Figure 12 in this manual. Check the clear- ances on each burner for the model heater being installed to make sure the product is suitable for your application and the clearances are maintained. Read and follow the safety guidelines below:

• Keep gasoline or other combustible materials including flammable objects, liquids, dust or vapors away from this heater or any other appli- ance.

• The stated clearances to combustibles represents a surface temperature of 90° F (50°C) above room temperature. Building materials with a low heat tol- erance (such as plastics, vinyl siding, canvas, tri- ply, etc) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation.

• Maintain clearances from heat sensitive equipment and workstations.

• Maintain clearances from vehicles parked below the heater.

• Maintain clearances from swinging and overhead doors, overhead cranes, vehicle lifts, partitions, storage racks, hoists, building construction, etc.

SECTION 3: CLEARANCES TO COMBUSTIBLES

WARNING

Fire Hazard

Keep all flammable objects, liquids and vapors the minimum required clearances to combustibles away from heater.

Some objects will catch fire or explode when placed close to heater.

Failure to follow these instructions can result in death, injury or property damage.

• In locations used for the storage of combustible materials, signs must be posted to specify the maximum permissible stacking height to maintain required clearances from the heater to the com- bustibles. Signs must be posted adjacent to the heater thermostat. In the absence of a thermostat, signs must be posted in a conspicuous location.

• Consult local Fire Marshal, Fire Insurance Carrier or other authorities for approval of proposed instal- lation when there is a possibility of exposure to combustible airborne materials or vapors.

• Hang heater in accordance to the minimum sus- pension requirements on Page 14, Figure 14.

• If the radiant tubes must pass through the building structure, be sure that adequate sleeving and fire stop is installed to prevent scorching and/or fire hazard.

NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.

2.Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect.

FIGURE 3: STANDARD REFLECTOR

		(inches)				(centimeters)
Model	A	B	C	D	A	B	C	D
CTH2-40	6	27	53	27	16	69	135	69
CTH2-60	6	35	63	35	16	89	161	89
CTH2-80	6	38	66	38	16	97	168	97
CTH2-100	6	40	71	40	16	102	181	102
CTH2-125	6	46	77	46	16	117	196	117
CTH2-150	6	50	80	50	16	127	204	127
CTH2-175	8	52	82	52	21	133	209	133

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