of the building. Turn on all appliances not connected to the venting system. Turn on all exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Close fireplace dampers.
4.Follow the lighting instruction. Place the water heater being inspected in operation. Adjust thermostat so appliance shall operate continuously.
5.Test for draft hood spillage at the relief opening after 5 minutes of main burner operation.
6.After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use.
7.If improper venting is observed during any of the above tests, the venting system must be corrected.
WARNING
FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR CONTAMINATION AND UNSAFE CONDITIONS.
•If the back draft cannot be corrected by the normal method or if a suitable draft cannot be obtained, a blower type flue gas exhauster must be employed to assure proper venting and correct combustion.
SERVICE INFORMATION
The installer may be able to observe and correct certain problems which may arise when the unit is put into operation. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater.
FOR YOUR SAFETY AND SATISFACTORY OPERATION, IT IS RECOMMENDED THAT THIS HEATER BE CHECKED ONCE A YEAR BY A COMPETENT SERVICE PERSON.
USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERATION PERIODICALLY BY A QUALIFIED SERVICE TECHNICIAN.
PILOT AND MAIN BURNER
Check pilot, figure 7, and main burner at least every 6 months for proper flame characteristics. The main burner should display the following characteristics:
1.Provide complete combustion of gas.
2.Cause rapid ignition and carryover of flame across entire burner.
3.Give reasonably quiet operation during ignition, burning and extinction.
4.Cause no excessive lifting of flames from burner ports.
If preceding burner characteristics are not evident, check for accumulation of lint or other foreign material that restricts or blocks the air openings to the heater or burner.
WARNING
SOOT
Should the main burner or burner air openings require cleaning, remove the burner and clean with a soft brush. Clean main burner orifice with a suitable soft material. Do not disassemble burner head unless necessary.
CHECK FOR GOOD FLOW OF COMBUSTION AND VENTILATING AIR TO THE UNIT. MAINTAIN A CLEAR OPEN AREAAROUND THE HEATER AT ALL TIMES. DO NOT STORE COMBUSTIBLES OR FLAMMABLE LIQUIDS NEAR OR AROUND AN APPLIANCE.
PILOT AND MAIN BURNER
FIGURE7
CHECKING GAS INPUT
For appliance installation locations with elevation above 2000 ft.(610m) refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.
With this heater in operation, determine whether it is receiving the full rated input of gas. This may be done by timing the gas meter and measuring gas pressure with a gauge or manometer. When the heater is operating at full capacity (full gas input) it should consume approximately 1 cubic foot of gas in the time shown in table 3.
TABLE 3
INPUT CHECK TIME REQUIRED TO
CONSUME 1 CU. FT. OF GAS
|
|
| Time Required To |
| Type of | BTU Per | Consume 1 Cu. Ft. |
Model | Gas | Cu. Ft. | of Gas |
Natural | 1050 | 58.2 sec. | |
Propane | 2500 | 163.7 sec. |
Use this formula to “clock” the meter. Be sure that other gas consuming appliances are not operating during this interval.
3,600 X H = Btuh
T
T = Time in seconds needed to burn one cubic foot of gas.
H = Heating value of gas in Btu’s per cubic foot of gas.
Btuh = Actual heater input rate. Example: (Using
T = 58.2 seconds/ft3
H= 1,050 Btu/ft3 (natural gas) Btuh = ?
3,600 X 1,050 = 64.948 Btu/hr (19.0 KW)
58.2
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