GMEC96 Installation Manual

13
PVC primer meeting ASTM F656 and PVC solvent cement


D3311. Carefully follow the manufactures instructions for
cutting, cleaning and solvent cementing of PVC.
-
terials must be UL S636 listed. NOTE: Requirement does
not apply to the combustion air pipe.
-
tings, ABS materials which are in compliance with the following

40 pipe must meet ASTM D1527 and, if used in Canada, must
be CSA listed. Solvent cement for ABS to ABS joints must meet
ASTM D2235 and, if used in Canada, must be CSA listed. The
solvent cement for the PVC to ABS transition joint must meet

D2661 and ASTM D3311 and, if used in Canada, must be CSA
listed. Carefully follow the manufacturers’ instructions for
cutting, cleaning, and solvent cementing PVC and/or ABS.



1/16” minimum from the plane of one opening to the center
line of the other opening for 2” diameter pipe, and 4 9/16”
minimum for 3” pipe.


Adhere to these instructions to ensure safe and proper furnace
performance. The length, diameter, and number of elbows of


sized. All piping must be installed in accordance with local
codes and these instructions.
Some models require the use of 3” pipe. Do not transition
from a 2” to 3” pipe in a horizontal section of pipe as this
may create a water trap.
PREFERRED
Figure 4
TRANSITION NO LESS
THAN 45 DEGREES TO
HORIZONTAL PLANE TO
AVOID CREATING A WATER
TRAP IN VENT PIPING.
ACCEPTABLE
Figure 5
NO TRANSITION ON
HORIZONTAL PLANE,
THIS CREATES A
WATER TRAP AND
RESTRICTS FLUE
GASES
Figure 6
Piping must be adequately secured and supported to prohibit
sagging, joint separation, and/or detachment from the fur-


downward slope, back towards the furnace, to properly return
condensate to the furnace’s drain system. Allowances should be
made for minor expansion and contraction due to temperature
variations. For this reason, particular care must be taken to

less than 40 inches.
Precautions should be taken to prevent condensate from freez-
-

below 35°F for extended periods of time must be insulated with

outdoors in excess of the terminations shown in this manual (or
in unheated areas) must be insulated with 1/2” thick closed
cell foam. Inspect piping for leaks prior to installing insulation.