Lennox G21 - Page 2

4 --Applyaluminumfoiltapeinlinearstripsoverpipeand
cable.Do not spiral wrap foil tape over pipe. tt may
be necessary to fold one strip up from the bottom and
one strip down from the top of the pipe to ensure
complete coverage. See figure 2.
5--Insulate pipe using fiberglass insulation or
equivalent, i.e. Armaflex. For protection to 0°F use
minimum of 1/2" fiberglass insulation or equivalent
(i.e. Armaflex.) For protection to --20°F, use 1"
fiberglass insulation or equivalent. For protection to
- -40° F,use 1-1/2" fiberglass insulation or equivalent.
See figure 2.
6--Use waterproofing materials such as polyethylene
sheets or other vapor barriers to protect insulation in
areas exposed to moisture (vent termination).
7 - - Refer to figure 3 for G21 condensate trap assembl
G21 CONDENSATE TRAP ASSEMBLY
HEAT CABLE
TRAP
FIBERGLASS
TAPE
*Heat cable can be run
straight on 0.5" condensate
line. See table 2.
DO NOT BLOCK
CLEAN-OUT PLUG
START OF
CORDSET
FIGURE 3
8 - -Two methods may be used to apply the heat cable to
concentric vent terminations. See figures 4 and 5.
Figure 4 shows wrapping the heat cable around a
concentric vent termination that has already been
installed. The 24ff. heat cable is recommended for
this method.
CONCENTRIC WALL
TERMINATION APPLICATIONS
EXHAUST CLAMP
\ FIBERGLASS
TAPE "_l_
INTAKE
EXHAUST
FLUE/
CAP
FIGURE 4
9--Figure 5 shows wrapping a concentric vent
termination before it has been installed. The 6 ft.
I
cable is sufficient for this method. If allowable, this
method is recommended over the first method
because it provides better flue pipe protection.
NOTE-- The waft or roof hole may need to be
enlarged to provide enough clearance for the heat
cable and insulation. The heat cable can be installed
over the mounting clamp or the clamp can be opened
up to provide enough clearance for the heat cable
and insulation.
IMPORTANT J
Drill 1/2" dia. hole in rain shield
HEAT CABLE for cable. Seal hole after running
1-1/2"
__ heat cable Jr.
through
EXHAUST
Dr,,,/2"dia.he,oi°iow,°OO°te,Sg°
from air intake connection. Seal hole l /
after running heat cable through it. RAIN
/
i .o
FIBERGLASS
_/_F-_ AIR INTAKE
FIGURE 5
10- -For the HM30 module of the CompleteHeat system,
spiral wrap the flue trap twice with heat cable before
wrapping the condensate line. See figure 6. Enlarge
condensate line cabinet hole to allow for heat cable
and insulation. Make sure there is enough clearance
between heat cable and cabinet. Protective coating
on heat cable must not be damaged. Do not wrap
the flue trap boot.
HM30 FLUE TRAP
FLUE TRAP
CONDENSATE
LINE*
FIBERGLASS
TAPE
i
FLUE TRAP BOOT ," ,
!
_IL ..................J *Heat cable can be run
straight on 0.5" condensate
line. See table 2.
FIGURE 6
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