21
WARNING
UNDER NO CIRCUMSTANCES SHOULD THE INPUT EXCEED THE
RATE SHOWN ON THE HEATER RATING PLATE. OVER FIRING COULD
RESULT IN DAMAGE OR SOOTING OF THE HEATER.
CATHODIC PROTECTION
CAUTION
HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM
SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG
PERIOD OF TIME (GENERALLY TWO WEEKS OR MORE).
HYDROGEN
GAS IS EXTREMELY FLAMMABLE
.
To reduce the risk of injury under
these conditions, it is recommended that a hot water faucet be opened
for several minutes before using any electrical appliance connected to
the hot water system. If hydrogen is present, there will probably be an
unusual sound such as air escaping through the pipe as the water begins
to flow. There should be no smoking or open flame near the faucet at
the time it is open.
PRECAUTIONS
IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT OPERATE
HEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A
QUALIFIED SERVICEMAN.
1. FLOODING TO OR ABOVE THE LEVEL OF THE BURNER OR CONTROLS
2. EXTERNAL FIRING
3. DAMAGE
4. FIRING WITHOUT WATER
5. SOOTING
NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS
FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF
VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF,
TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.
GENERAL INFORMATION
POWER BURNER
The initial start-up procedure of the unit is provided on page 20.
TABLE 4
GAS SUPPLY
SPECIFICATIONS
Natural
Gas 199
Propane
Gas 199
Maximum Gas Supply Pressure
10. 5” WC
(2.59kpa)
14.CTWC
(3.45kpa)
Nominal Gas Supply Pressure
7.0” WC
(1 .74Kpa)
11.0”WC
(2.74Kpa)
Minimum Gas Supply Pressure
4.8” WC
(1.18Kpa)
8.5” WC
(2.08 Kpa)
Manifold Pressure
0” WC
(OKpa)
0” WC
(OKpa)
HIGH ALTITUDE INSTALLATIONS
WARNING
THESE HEATERS ARE CERTIFIED FOR USE WITHOUT MODIFICATION
FOR ALTITUDES UP TO 10,100 ft. (3078 m). INSTALLATIONS ABOVE
THESE ALTITUDES MAY REQUIRE REPLACEMENT OF THE BURNER
ORIFICE. CALL THE TECHNICAL CENTER @ (800) 527-1953 FOR
REQUIREMENTS.
Some gas utility companies derate their gas for altitude, making it unnecessary
to install high altitude orifices. Call the local gas or utility company to verify
BTU content.
Due to the input rating reduction at high altitudes, the output rating of the
appliance is also reduced and should be compensated for in the sizing of
the equipment for applications.
MAINTENANCE
GENERAL
KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE
MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS
AND LIQUIDS. (SEE WARNING ON PAGE 5, LOCATING THE
HEATER).
Water heater maintenance includes periodic tank flushing and cleaning, and
removal of lime scale. The unit should be inspected and adjusted to maintain
proper combustion. Refer to the following table. A periodic inspection of the
venting system should be made. Where used, the water circulating pump
should be oiled.
MAINTENANCE SCHEDULE
Following are the instructions for performing some of the recommended
maintenance. Unit inspection and adjustment should be performed by a
competent technician.
COMPONENT OPERATION INTERVAL
REQUIRED
Tank
Sediment
Monthly
Flushing
Removal
Tank
Lime Scale
Semi
UN-LIME
®
Removal
Annually
Delimer
Relief Valve
Inspect
Semi
Annually
Clean Inlet
Blower
Screen and
As Required
Soft Brush
Blower Wheel
Vent System
Inspect
Every 3
Joints should
Months
be sealed
