Lennox International Inc. Lennox CompleteHeatTM COMBINATION HEATING SYSTEM - Manual (Page 7)

Page 6
ADJUSTING WATER TEMPERATURE
Remove the HM30 access panel. The water temperature dial is loĆ
cated at the lower left hand side of the HM30 control box. It is facĆ
tory set at 120_F (49_C). Water temperature setting may be raised
by turning dial clockwise to the desired setting. Temperature setĆ
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 antiĆscald and pointĆofĆuse water mixĆ
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 reĆ
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 reĆapply power to the unit.
DO NOT reĆapply power to a dry tank. The burner should never operate with an empty water tank. Irreparable
damage to the HM30 unit may occur.