Lennox International Inc Lennox CompleteHeatTM COMBINATION HEATING SYSTEM manual

ADJUSTING WATER TEMPERATURE

Remove the HM30 access panel. The water temperature dial is lo￿ cated at the lower left hand side of the HM30 control box. It is fac￿ tory set at 120_F (49_C). Water temperature setting may be raised by turning dial clockwise to the desired setting. Temperature set￿ tings are marked from 110_F (43_C) to 140_F (60_C). Each dash mark represents an increase of 10_F (5.6_C). Some local building codes limit the temperature of potable water to 120_F (49_C). Ask your Lennox dealer for information on highest allowable water temperatures and the use of anti￿scald and point￿of￿use water mix￿ ing valves. These valves help reduce the risk of scalding.

KEEPING YOUR SYSTEM IN TOP FORM

HM30 Tank Draining Procedure

It is recommended that 5 to 10 gallons of water from the HM30 tank be drained every six months to re￿ move any sediment. This may need to be done more often in areas of poor water condition.

1-Turn off power to unit and allow water temperature in HM30 tank to cool.

2-Remove HM30 access panel.

3-Connect hose to drain valve and route to open drain.

4-Open drain valve to allow water to flow.

5-After draining, close drain valve and disconnect hose. Replace access panel.

6-Fill tank with water and re￿apply power to the unit.

DO NOT re,apply power to a dry tank. The burner should never operate with an empty water tank. Irreparable damage to the HM30 unit may occur.

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