State Industries SRT80 120NE warranty General Information, Maintenance

GENERAL INFORMATION

POWER BURNER

The SEQUENCE OF OPERATION is provided on page 21 and the INITIAL START-UP procedure of the unit on page 23.

HIGH LIMIT

The high limit switch (not adjustable) is factory set to cutout at 199°F (93°C). The controller must be manually reset by cycling the power to the unit and the water temperature must be below 180°F (82°C).

TABLE 4

GAS SUPPLY SPECIFICATIONS	RTF-120 Natural Gas
Max. Gas Supply Pressure W.C.	14.0 (3 kPa)
Nominal Gas Supply Press. W.C	7.0 (1.74 kPa)
Minimal Gas Supply Press. W.C.	6.2 (1.53 kPa)
Manifold Press. W.C.	4.5 (1 kPa)

HIGH ALTITUDE INSTALLATIONS

WARNING

THE SRT80-120E IS CERTIFIED FOR USE WITHOUT MODIFICATION FOR ALTITUDES UP TO 2000 FEET. INSTALLATIONS ABOVE 2000 FEET MAY REQUIRE REPLACEMENT OF THE BURNER ORIFICE IN ACCORDANCE WITH THE NATIONALFUELGAS CODE (ANSI Z223.1/ NFPA 54). FAILURE TO REPLACE THE ORIFICE WILL RESULT IN IMPROPER AND INEFFICIENT OPERATION OF THE APPLIANCE, PRODUCING CABON MONOXIDE GAS IN EXCESS OF SAFE LIMITS, WHICH COULD RESULTIN SERIOUS PERSONALINJURY OR DEATH.

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 AREACLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS. (SEE WARNING ON PAGE 11, 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.

COMPONENT	OPERATION	INTERVAL	REQUIRED
Tank	Sediment Removal	Monthly	Flushing
Tank	Lime Scale Removal	Semi-Annually	UN-LIME®Delimer
Anode Rods	Inspect	Semi-Annually	Replace as
			Required
Relief Valve	Inspect	Semi-Annually
Circulating			SAE No. 20
Pump (1)	Oiling	Four Months	non-detergent
			motor oil
Blower	Clean Inlet Screen
	and Blower Wheel	As Required	Soft Brush
Vent System	Inspect	Every 3 Months	Joints should
			be sealed

(1) If furnished with oiling provision.

MAINTENANCE SCHEDULE

Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician.

FLUSHING

1.Turn off the heater electrical disconnect switch.

2.Open the drain valve and allow water to flow until it runs clean.

3.Close the drain valve when finished flushing.

4.Turn on the heater electrical disconnect switch.

DRAINING

Maintenance and service procedures may also require draining the heater.

1.Turn off the heater electrical disconnect switch.

2.Close the cold water inlet valve to heater.

3.Open a nearby hot water faucet to vent the system.

4.Open the gate valve on plumbing manifold.

5.If the heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this period.

• Follow FILLING instructions when restoring hot water service.

SEDIMENT REMOVAL

Waterborne impurities consist of the particles of soil and sand which settle out and form a layer of sediment on the bottom of the tank.

For convenience, sediment removal and lime scale removal should be performed at the same time.

LIME SCALE REMOVAL

The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage. The higher the water temperature or water usage, the more lime deposits are dropped out of the water. This is the lime scale which forms in pipes, heaters and on cooking utensils.

Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption.

The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained.

The depth of lime buildup should be measured periodically. Heaters will have about 3" (7.6cm) of lime buildup when the level of lime has reached the bottom of the cleanout opening or about 1" (2.5cm) of lime buildup if it has reached the drain valve opening. A schedule for deliming should be set up, based on the amount of time it would take for a 1" (2.5cm) buildup of lime.

Example 1:

Initial six-month inspection shows 1/2" (1.3cm) of lime accumulation. Therefore, the heater can be delimed once a year.

Example 2 :

Initial six-month inspection shows 2" (5cm) of lime accumulation. Therefore, the heater should be delimed every 3 months.

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