Other Unit Adjustments - Lennox ELITE Series Installation Instructions Manual

Combustion Air for Non-Direct Vent Applications
WARNING
CARBON MONOXIDE POISONING HAZARD!
Failure to follow the steps outlined below for each
appliance connected to the venting system being placed
into operation could result in carbon monoxide poisoning
or death. The following steps shall be followed for each
appliance connected to the venting system being placed
into operation, while all other appliances connected to
the venting system are not in operation.
After the EL196UHE gas furnace has been started, the
following test should be conducted to ensure proper vent-
are separately vented.
If a EL196UHE furnace replaces a Category I furnace
which was commonly vented with another gas appliance,
must be checked. Without the heat of the original furnace
for the single water heater or other appliance. The vent
should be checked for proper draw with the remaining ap-
pliance.
The test should be conducted while all appliances (both
in operation and those not in operation) are connected to
the venting system being tested. If the venting system has
been installed improperly, or if provisions have not been
must be made as outlined in the previous section.
1 - Seal any unused openings in the venting system.
which could cause an unsafe condition.
3 - To the extent that it is practical, close all building
doors and windows and all doors between the space
in which the appliances connected to the venting
system are located and other spaces of the building.
5 - Turn on clothes dryers and any appliances not
connected to the venting system. Turn on any
exhaus fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed.
Do not operate a summer exhaust fan.
6 - Follow the lighting instruction to place the appliance
being inspected into operation. Adjust thermostat so
appliance will operate continuously.
minutes of main burner operation.
8 - If improper venting is observed during any of the
above tests, the venting system must be corrected
using the appropriate tables in appendix G in the
current standards of the National Fuel Gas Code
ANSI-Z223.1/NPFA 54 in the U.S.A., and the
appropriate Natural Gas and Propane appliances
CSA-B149 Natural Gas and Propane Installation
Codes in Canada.
9 - After determining that each appliance remaining
connected to the common venting system properly
events when tested as indicated in step 3, return
and any other gas-burning appliance to their previous
condition of use.

Other Unit Adjustments

Primary Limit.
The primary limit is located on the heating compartment
vestibule panel. This limit is factory set and requires no
adjustment.
Flame Rollout Switches (Two)
These manually reset switches are located in the burner
box.
Pressure Switch
The pressure switch is located in the heating compartment
on the cold end header box. This switch checks for proper
combustion air inducer operation before allowing ignition
trial. The switch is factory-set and must not be adjusted.
Temperature Rise
After the furnace has been started and supply and return
temperature rise. If necessary, adjust the blower speed
to maintain the temperature rise within the range shown
on the unit nameplate. See TABLE 17 on page 54 for
allowable heating speeds. Increase the blower speed to
decrease the temperature. Decrease the blower speed to
increase the temperature rise. Failure to adjust the tem-
perature rise may cause erratic limit operation.
Fan Control
Fan On Delay
The heat fan on time of 30 seconds is not adjustable. The
cool fan on delay is 2 seconds and not adjustable.
be adjusted by changing the jumper position across the
temperature between 90° and 110°F at the moment that
vide lower return air temperatures; shorter settings pro-
vide higher return air temperatures. See Figure 62. The
and not adjustable.
Page 46
-
-