All installations and services must be performed by qualified service personnel.
Remove the 11/16” diameter clear tubing from the coil drain nipple and run tap water into the open end of
the tubing. This should keep the drain system clean. Replace the tubing by pushing it firmly onto the
nipple. Make sure the spring clamp is returned to the original position to prevent leaks. If any of the
electrical controls are exposed to water, dry with a soft cloth and wait 24 hours before operating the
furnace. Set the room thermostat to the desired temperature and restore electrical power to the furnace.
J. GENERAL GAS PIPING
: Because of the potential of odorant fade, a gas leak may not be detected by smell. If
this furnace is installed below grade, contact your gas supplier for a gas detector.
1. Left and right gas supply piping - These furnaces are set-up to be gas piped through either the left or
right side by using a street elbow and a straight pipe. For the purposes of service, it is recommended
that the gas union be located inside the furnace, when possible.
Figure 18
2. A drip leg must be used on both LP and natural gas installations prior to the furnace in order to trap
oil, condensate and other impurities which might otherwise lodge in the gas valve or plug the burner
orifice. A drip leg shall be provided at the outlet of the gas meter when there is excessive
condensation between the gas meter and the furnace. Failure to install a drip leg may void the limited
warranty on the furnace.
: All gas piping must be leak tested using a soap and water solution (when the gas is
turned on) following the procedure outlined in Section III, J, of this manual. A final test for gas
leakage must be made after purging the gas line (refer to Section IV, B, of this manual). This test
must be conducted with the unit operating and should include the furnace piping and gas valve.
Never use an open flame to check for a gas leak.
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