Lochinvar TNR-I&S-02 service manual Maintenance, General, Burner Flame Check, Sight Glass Location

		TNR-I&S-02
TEMPERATURE ADJUSTMENT	Figure 25	Sight Glass Location
The temperature selector knob of the thermostat has been adjusted to
120° F when shipped from the factory.
NOTICE
The lower the temperature setting, the greater the energy efficiency,
both to heat the water and to maintain the storage temperature
during standby periods. Lower water temperatures also extend tank
life. Remember, no water heating system will provide exact
temperatures at all times. Allow a few days of operation at this
setting to determine the correct temperature setting consistent with
the requirements for the installation.
CAUTION
This water heater, when set at a lower temperature setting is not
capable of producing hot water of sufficient temperature for sanitizing
purposes.
During the winter season or any cold period, you may desire a higher
temperature setting to adjust for the colder incoming water. This adjustment,
however, may cause additional condensation to form on the colder tank
surface. This does not mean the tank is leaking. During summer months,		MAINTENANCE
the warmer incoming water temperatures will benefit the performance of
your water heater and reduce the amount of condensation developed.		DANGER

Condensation does not mean your tank is leaking. Most of reported tank		DO NOT ATTEMPT TO REPAIR GAS VALVE.
		DO NOT ATTEMPT TO REPAIR IGNITION MODULE.
leaks on installation are proven to be condensation. To avoid unnecessary
		DO NOT ATTEMPT TO REPAIR VENTURI.
inconvenience and expense, make sure the tank is leaking before calling
		DO NOT ATTEMPT TO REPAIR THERMOSTAT BOARD.
an independent servicing contractor or qualified service professional.
		DO NOT ATTEMPT TO REPAIR TRANSFORMER.
		DO NOT ATTEMPT TO REPAIR PRESSURE SWITCH.
	DANGER
Hotter water increases the risk of scald injury. Scalding may occur
within 5 seconds at a temperature setting of 135°F (57°C). To protect		GENERAL
against hot water injury, install an anti-scald tempering valve in the
water system. This valve will reduce point of discharge temperature
by mixing cold and hot water in branch water lines. A licensed		KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS,
plumbing professional or local plumbing authority should be consulted.		GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS.
This water heater is equipped with an energy cut out device to
prevent overheating. Should overheating occur or the gas supply		Water heater maintenance includes periodic tank flushing and cleaning,
fail to shut off, turn off the manual gas control valve to the appliance		and removal of lime scale. The unit should be inspected and adjusted to
and call a qualified service agency.		maintain proper combustion. Refer to Table 4, “Suggested Maintenance
If the water heater is to remain idle for 30 days or more or is subjected to		Schedule”. A periodic inspection of the venting system should be made.
freezing temperatures while shut off, the water heater and piping should		MAINTENANCE SCHEDULE
be fully drained and the drain valve should be left fully open. Refer to the
		Following are the instructions for performing some of the recommended
“General Operation” section of this Installation and Operating Instructions
		maintenance. Unit inspection and adjustment should be performed by a
Manual for the procedure on draining the water heater.
		competent technician.

BURNER FLAME CHECK

At the time of installation and at monthly intervals, a visual check of the burner flames should be made to determine if they are burning properly. The main burner may be seen through the sight glass window on the front of the combustion insert mounting bracket (Figure 25). The burner flames should be a blue flame near the burner surface in a uniform flame pattern. Occasional yellow or white streaks are normal.

1 7