How the completeheat, System works, Completeheat typical applications – Lennox International Inc. Lennox CompleteHeatTM COMBINATION HEATING SYSTEM User Manual
Page 3
Page 2
HOW THE CompleteHeat
TM
SYSTEM WORKS
The CompleteHeat system consists of a heating module (HM30) that produces hot water and an air hanĆ
dling module (AM30) that sends warmed air through the home's duct system. The two modules may be
installed together (closeĆcoupled) or apart (remote).
The system's operation begins when cold potable water fills the water storage tank through the pipe at
the top of the HM30 unit. When heat is needed to produce warm water or air, the HM30 control tells the
combustion air blower to draw in outside air for use in combustion. After a short safety delay, a fuel mixĆ
ture is sent into the burner where it is ignited by an electronic spark. Burning fuel moves through the
stainless steel heat exchanger inside the water storage tank. The water surrounding the heat exchanger is
heated until the water temperature reaches the desired setpoint on the water thermostat dial.
Combustion products travel out of the heat exchanger, condensate water is drained, and exhaust gases
are vented safely to the outdoors. Hot water is directed from the HM30 to faucets, shower heads, and
appliances (such as the dishwasher and washing machine) through the plumbing located on top of the
HM30 unit.
When the room thermostat senses a need for heat, the AM30 water circulating pump draws hot water
from the HM30 heating module and routes it through the AM30 space heating coil. The aluminium and
copper coil absorbs heat from the water. The blower turns on, blowing air across the heated coil.
Warmed air is sent through the air duct system into the home. Water circulates back to the HM30 unit to
be reheated until the room temperature reaches the thermostat setting.
CompleteHeat Typical Applications
Upflow CloseĆCoupled Installation
with Cooling Coil
Horizontal Remotely Located Installation
with Cooling Coil
Air Conditioner
Air Conditioner
AM30
Air Handling
Module
HM30
Heating Module
HM30
Heating
Module
AM30
Air Handling
Module