| 12" (305mm) MAX. for 2" (51mm) | |
UNCONDITIONED | 20" (508mm) MAX. for 3" (76mm) | |
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SPACE |
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6" (152mm) |
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Max | SIZE TER- | |
| MINATION | |
*WALL SUPPORT | PIPE PER | |
OUTSIDE WALL | TABLE 8. | |
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FIELD−PROVIDED | 12" (305mm) | |
REDUCER MAY BE | ||
ABOVE GRADE OR | ||
REQUIRED TO | ||
AVERAGE SNOW | ||
ADAPT LARGER | ||
ACCUMULATION | ||
VENT PIPE SIZE TO | ||
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TERMINATION |
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1/2" (13mm) FOAM |
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INSULATION IN |
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UNCONDITIONED | 1/2" (13mm) FOAM | |
SPACE | ||
INSULATION | ||
*Use wall support every 24" (610). Use | ||
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two supports if extension is greater |
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than 24" but less than 48". |
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NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION EX- TENDED OR (15F74) WALL TERMINATION VENT PIPE EXTENDED
FIGURE 40
ML193DF NON−DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
| SIZE TERMINATION |
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| STRAIGHT−CUT OR | |||||||
| PIPE PER TABLE 8. |
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| ANGLE−CUT IN DIRECTION | ||||||||
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| OF ROOF SLOPE | ||||||||
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| 3" − 8" |
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| EXHAUST VENT |
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| (76mm− |
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| 1/2" (13mm) |
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| 203mm) |
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| WEATHERPROOF |
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Minimum 12" (305MM) |
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| INSULATION |
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above chimney top |
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plate or average snow |
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SHOULDER OF FITTINGS |
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accumulation |
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| PROVIDE SUPPORT |
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| OF PIPE ON TOP PLATE |
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| SHEET |
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| METAL TOP |
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| PLATE |
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| 3" − 8" | ||||
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| 203mm) | ||||
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| INSULATE |
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| TO FORM |
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| EXTERIOR |
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| SEAL |
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| CHIMNEY |
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NOTE − Do not discharge exhaust gases directly into any chimney or vent stack. If ver- tical discharge through an existing unused chimney or stack is required, insert piping inside chimney until the pipe open end is above top of chimney and terminate as illus- trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 41
Condensate Piping
This unit is designed for either right- or
NOTE − If necessary the condensate trap may be installed up to 5´ away from the furnace. Use PVC pipe to connect trap to furnace condensate outlet. Piping from furnace must slope down a minimum of 1/4" per ft. toward trap.
CONDENSATE TRAP AND PLUG LOCATIONS | ||
Trap |
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(same on |
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right side) |
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1−1/2 in. | Plug | |
(same on left | ||
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| side) | |
FIGURE 42
1 − Determine which side condensate piping will exit the unit, location of trap, field−provided fittings and length of PVC pipe required to reach available drain.
2 − Remove plug (figure 42) from the cold end header box at the appropriate location on the side of the unit. Install field−provided 1/2" NPT male fitting into cold end head- er box. Use teflon tape or appropriate pipe dope.
3 − Install the cap over the clean out opening at the base of the trap. See figure 45.
NOTE − Vinyl tubing may be used for condensate drain. Tubing must be 1−1/4" OD X 1" ID and should be attached to the drain on the trap using a hose clamp.
4 − Install drain trap using appropriate PVC fittings, glue all joints. Glue the provided drain trap as shown in fig- ure 45. Route the condensate line to an open drain.
NOTE − If necessary the condensate trap may be installed up to 5 feet away from the furnace. Piping from furnace must slope down a minimum of 1/4" per ft. toward trap.
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