All installations and services must be performed by qualified service personnel.
25
NOTICE:
If an air conditioning condensate drain line is combined with the furnace
condensate drain line, the air conditioning evaporator coil must have a separate trap installed
ahead of the connection joint.
6. A condensate pump may be required when,
•
a suitable drain is not present,
•
the drain is above the trap outlet level on the furnace, or
•
the drain line cannot be sloped downward its full length to the drain.
If gravity drainage of the condensate from the furnace to a drain is impractical for any of these
reasons, a condensate pump (part # 350225) is available from Thermo Products. Follow the
pump manufacturer’s instructions for proper installation.
7.
CAUTION:
Continual exposure to condensate may injure plants and damage certain
building materials, including many metals, wood, stone, and concrete.
Flue gas condensate is slightly acidic with a pH of about 3.5. (A pH level of 7.0 is considered
neutral. Carbonated cola drinks with a pH of 3.1 are actually slightly more acidic than
condensate.) If local codes require an acid neutralizing kit, a kit is available from Thermo
Products under part no. 320095. Follow the instructions enclosed with the neutralizing kit for
proper installation.
8. The condensate piping in the furnace and the drain system should be flushed out at the start
of every heating season. This will ensure trouble free operation and will keep the acidity level
well above a pH of 3.4, i.e. more towards neutral.
To flush the condensate drain system, follow these steps.
a. Turn off electrical power to the furnace at the disconnecting switch and adjust the room
thermostat to “OFF”, or to the lowest temperature setting.
b. Flush the drain system by removing the drain hose from the secondary heat exchanger
coil drain nipple and running tap water into the open end of the tubing. Run at least a
quart of water through the drain system or more, until the water leaving the drain system
is clear and colorless in color and free of any particulate matter.
c. Replace the drain tubing by pushing it firmly onto the nipple. Make sure the spring-type
hose clamp is returned to the original position to prevent leaks.
d. If any of the electrical controls are inadvertently wetted during the flushing process, dry
them with a soft cloth and wait 24 hours before operating the furnace.
e. Adjust the room thermostat to the “HEAT” position, or 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.
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