Lennox International Inc Electric Heater Lennox CompleteHeatTM COMBINATION HEATING SYSTEM User Manual

PRODUCT LITERATURE  
503,718M  
6/98  
Supersedes 8/97  
TM  
CompleteHeat  
COMBINATION  
HEATING  
SYSTEM  
` SYSTEM OPERATION  
` MAINTENANCE  
` SAFETY CONSIDERATIONS  
Litho U.S.A.  
1997 Lennox Industries Inc.  
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TM  
HOW THE CompleteHeat 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  
AM30  
Air Handling  
Module  
HM30  
Heating  
Module  
HM30  
Heating Module  
AM30  
Air Handling  
Module  
Air Conditioner  
Page 2  
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SAFETY CONSIDERATIONS  
Consider the materials stored near to the CompleteHeat system. Make sure the area around both AM30  
and HM30 units has adequate space according to the prescribed clearances. DO NOT store combustible  
materials such as newspapers, rags, mops, or flammable liquids such as gasoline, kerosene, paint thinner  
near this or any other heating appliance.  
Vapors from flammable liquids will explode and catch fire  
causing death or severe burns.  
FOR YOUR SAFETY - Do not store or use gasoline or other  
flammable, combustible, or corrosive vapors and liquids in  
the vicinity of this appliance.  
Keep flammable products:  
1. far away from heater,  
2. in approved containers,  
3. tightly closed, and  
Vapors:  
1. cannot be seen,  
2. are heavier than air,  
3. go a long way on the floor and  
4. can be carried from other rooms  
to the heater by air currents.  
4. out of childrens reach.  
Water temperature over 125_F can cause severe burns  
instantly or death from scalds.  
Children, disabled and elderly are at high risk of being  
scalded.  
See the Adjusting Water Temperature section in this  
manual before setting temperature at heat module  
(HM30 unit). Feel water before bathing or showering.  
Temperature limiting valves are available and are recomĆ  
mended for all applications.  
Page 3  
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TO START THE CompleteHeat SYSTEM  
MAIN MANUAL SHUTĆOFF VALVE  
WARNING  
MAIN MANUAL  
SHUTĆOFF VALVE  
SHOWN IN  
If you do not follow these instructions exactly, a  
fire or explosion may result causing property  
damage, personal injury or loss of life.  
OFF POSITION  
1-STOP! Read the safety information at the beĆ  
ginning of this section.  
2-Set both room thermostat and water temperature  
dial to lowest settings.  
3-Turn off all electrical power to the CompleteHeat  
system (AM30 & HM30 unit). Ask your dealer to  
identify the disconnect switch or circuit breaker.  
4-The HM30 unit is equipped with an ignition device  
which automatically lights the burner. Do not try to  
light the burner by hand.  
5-Turn knob on main manual shutĆoff valve 90_ counterclockwise to ON. Do not force.  
6-Turn on all electrical power to system.  
7-Set room thermostat and water temperature dial to desired settings.  
NOTE - When unit is initially started, steps 1 through 7 may need to be repeated to purge air from gas  
line. The AM30 will not supply warm air until the water temperature in the HM30 tank is within 15_F  
(8.33_C) of the desired water thermostat setpoint.  
8-If the HM30 module will not operate, follow the instructions To Turn Off Gas To Unit" and call your  
service technician or gas supplier.  
TO SHUT OFF THE CompleteHeat SYSTEM  
1-Set room thermostat and water temperature dial to lowest settings.  
2-Turn off all electrical power to CompleteHeat system (AM30 and HM30).  
3-Turn knob on main manual shutĆoff valve 90_ clockwise to OFF. Do not force.  
Page 4  
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HOW TO SET THE ROOM THERMOSTAT  
Your thermostat may vary from this example; however, the operation is similar.  
TEMPERATURE SETTING LEVERS  
Simply set the indicator lever or dial on the  
thermostat to the desired temperature for heating  
and cooling modes.  
SYSTEM SWITCH  
Set the system switch for either heating, cooling or  
auto (if available). AutoĆchangeover is a setting that  
allows the system to heat or cool, depending on the  
need, without manually switching from one to  
another. This setting is useful during seasonal  
changes when heating may be needed in the  
morning and cooling in the afternoon.  
FAN SWITCH  
In AUTO or INT setting, the blower runs only when  
the thermostat calls for either heating or cooling.  
The ON or CONT setting runs the blower for  
constant air circulation and filtering, regardless of  
whether the equipment is heating or cooling. If your  
thermostat does not have ON or CONT settings and  
the continuous fan option is desired, ask your dealer  
about an optional continuous fan switch. In high  
humidity areas, the continuous fan operation tends  
to increase indoor humidity levels, ask your dealer  
which setting is best for your area.  
TEMPERATURE INDICATOR  
The temperature indicator needle shows the actual  
room temperature.  
System Switch  
Temperature Setting Levers  
Temperature Indicator  
Hinged Door  
(Shown Removed for Detail)  
Fan Switch  
PROGRAMMABLE THERMOSTATS  
Many systems are installed with a programmable thermostat. These thermostats provide the same  
SYSTEM and FAN control as standard thermostats, but also provide the feature of setting certain  
temperatures for different times of the day or days of the week. Most provide for the selection of both  
heating and cooling set points (the temperature at which you want that mode to come on). Refer to the  
separate instructions provided with your programmable thermostat for operation and adjustments.  
Page 5  
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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.  
Page 6  
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KEEPING YOUR SYSTEM IN TOP FORM-CONT.  
WARNING  
Electric shock hazard. Can cause  
injury or death. Before attempting to  
perform any maintenance, turn the  
External  
Side Return  
electrical power to unit OFF at disĆ  
connect switch(es). Unit may have  
multiple power supplies.  
Filter  
AM30 Air Module and Filters  
Having a clean filter is the most important step in keeping your new  
heating and air conditioning system working to its full potential.  
Dirt, dust and pet hair clog the filter as air cycles through the system.  
Dirty filters make the equipment work harder which causes the unit  
to use more energy than normal. A system with dirty filters will not  
provide you with the comfort you expect. Cleaning or  
Internal Bottom  
Return Air Filter  
(Upflow shown)  
replacing the filter is much less expensive than higher  
energy bills or damaged equipment.  
Pull filter door  
to remove filter  
Make sure that all the power is OFF to the unit  
before attempting to change filter. Have the dealer  
show you where your unit's filter is located. The  
filter may be found either inside or outside the  
AM30 air module or in the wall at the return air  
grille. If the filter is in the air module, it may be  
inside the unit behind an access panel or located on  
the side of the unit in an external filter rack. If  
replacement is necessary, always replace it with the  
same type of filter. If you don't know what filter you  
need, call your Lennox dealer with the model  
number of the unit. The dealer will be able to tell you  
what type and size filter you need.  
Remove lower  
access panel.  
Press side clips  
and pull filter  
up and out.  
The filter shipped with the AM30 unit is reusable and can be  
cleaned with a mild soap and water. The filter should be completely dried before being returned to the  
unit . When replacing, look for the airflow direction arrow marked on the filter. Disposable filters (used  
at the return air grille) cannot be cleaned but should be replaced every month. During times of heavy  
usage, it is beneficial to vacuum the filter in between changes or cleanings.  
Your system may include an electronic air cleaner which rids your home of even the smallest particles of  
dirt, dust and pollen. Ask your Lennox dealer to instruct you on its maintenance.  
Page 7  
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KEEPING YOUR SYSTEM IN TOP FORM-CONT.  
HM30 Temperature / Pressure Relief Valve Testing  
TEMPERATURE / PRESSURE (T&P) RELIEF VALVE  
TESTING PROCEDURE  
This valve is a safety device to protect  
Test Lever  
(Lift up to discharge water)  
against abnormally high temperature  
and pressures. Periodic discharge of  
the relief valve may indicate thermal  
expansion within a closed system.  
Temperature & Pressure  
Relief Valve  
Drain Line  
A thermal expansion tank will be needed to  
allow water to expand.  
If the valve discharges, it is doing so because there is  
a problem. Call your Lennox dealer or qualified  
technician to inspect the unit for proper  
HM30 Top  
Access Cover  
operation. Do not ignore the water disĆ  
charge. Never plug the T&P relief valve.  
WARNING  
Danger of Personal Injury from Scalding.  
Water from T&P relief valve may be exĆ  
tremely hot and is not tempered. Use exĆ  
treme caution when discharging valve. ReĆ  
placement of T&P valve should be done by  
a trained professional or a licensed plumbĆ  
ing contractor.  
T&P Valve  
Drain Line  
HM30  
Unit  
WARNING - Water from  
valve may be extremely hot.  
Use extreme caution when  
discharging valve.  
T&P valve testing should be done annualĆ  
ly. Remove HM30 top access panel. LoĆ  
cate the temperature and pressure relief  
valve.  
Drain  
Test the T&P valve by lifting the lever  
up until the valve unseats. This allows  
the water to discharge. Never open the T&P valve unless it is connected to a discharge line.  
If water does not flow, valve may be obstructed or corroded. Call your Lennox dealer or qualified techniĆ  
cian to inspect the valve.  
Page 8  
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BEFORE CALLING FOR SERVICE...  
1 Check to see that electrical disconnect switches are ON.  
2 Make sure the room thermostat temperature selector and  
water temperature dial are properly set.  
3 The room thermostat system switch should be in the ON  
position.  
4 Replace any blown fuses, or reset circuit breakers.  
5 Air filter should be clean.  
6 Write down the unit model number before calling.  
To keep your heating and cooling system running in peak operating condition  
year after year, contact your independent Lennox dealer about a service and  
maintenance program.  
Have the Lennox dealer fill out this information for future reference.  
AM30 Model #  
HM30 Model #  
Installer  
Serial #  
Serial #  
Phone #  
Date Installed  
Filter Size and Type  
Page 9  
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