5. Use remaining smaller diameter tube (factory-supplied in loose parts bag) to extend collector box pressure tube (pink label) which was previously connected to pressure switch.
6. Route this extended tube (pink label) to condensate trap relief port connection.
7. Determine appropriate length, cut, and connect tube.
8. Clamp tube to relief port connection.
E. Condensate Trap Freeze Protection
Refer to Condensate Drain Protection section for recommenda- tions and procedures.
F. Construct a Working Platform
Construct working platform where all required furnace clearances are met. (See Fig. 3 and 10.)
CAUTION: The condensate trap MUST be installed below furnace. See Fig. 4 for dimensions. The drain connection to condensate trap must also be properly
sloped to an open drain.
NOTE: Vent pipe length is restricted to a minimum of 5 ft. (See Table 4.)
NOTE: A 12-in. minimum horizontal pipe section is recom- mended with short (5 to 8 ft) vent systems. This recommendation is to reduce excessive condensate droplets from exiting the vent pipe. (See Fig. 10 or 33.)
LOCATION
I. GENERAL
When a furnace is installed so that supply ducts carry air to areas outside the space containing the furnace, return air must also be handled by ducts sealed to furnace casing. The ducts terminate
INDUCER HOUSING DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
A93303
Fig. 11ÐHorizontal Right Tube Configuration
3. Route extended collector box pressure tube behind induceroutside the space containing the furnace to ensure there will not be
motor bracket then between inducer motor and pressurea negative pressure condition within equipment room or space.
switch.This furnace must be installed so electrical components are
4. Connect collector box pressure tube (green label) to pres-protected from water. sure switch connection labeled COLLECTOR BOX.
| CAP | COLLECTOR BOX DRAIN TUBE (BLUE) |
| COLLECTOR BOX TUBE (GREEN) |
| |
COLLECTOR BOX EXTENSION TUBE
PLUG
COLLECTOR BOX TUBE (PINK)
CONDENSATE |
TRAP |
COLLECTOR BOX DRAIN TUBE |
(BLUE AND WHITE STRIPED) |
LEVEL (0″) FRONT TO
1⁄2″ MAX
UPFLOW OR DOWNFLOW | HORIZONTAL |
A93025
NOTE: For proper furnace operation, install furnace so that it is level or pitched forward within 1/2 in. to ensure proper condensate drainage from secondary heat exchangers.
Locate furnace as close to center of air distribution system as possible.
Locate furnace so vent pipe maximum length is not exceeded. Refer to Table 4ÐMaximum Allowable Pipe Length.
Provide ample space for servicing and cleaning. Always comply with minimum fire protection clearances shown on unit's clear- ance to combustibles label. (See Fig. 3.) Locate furnace where available electric power and gas supplies meet specifications on furnace rating plate.
CAUTION: Do not install furnace in a corrosive or contaminated atmosphere. Make sure all combustion and circulating air requirements are met.
Ð11Ð
