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GAS UNITS
KITS AND ACCESSORIES
@1997 Lennox
Industries
Inc,
503,289M
Dallas, Texas
2/97
Supersedes
7/96
_j_ Technical
_L
Publications
Utho U.S.A,
HEAT CABLE KIT
INSTALLATION
INSTRUCTIONS
FOR HEAT CABLE
KIT (LB--88643A,
B & C) USED
WITH G21, GSR21,
G26, GHR26
AND COMPLETEHEAT
SERIES UNITS
Package 1 of 1 contains:
1 - - Heat cable
Heat cable kit protects drip leg assembly, condensate
line, flue pipe and vent terminations
when the unit is
installed
in unconditioned
spaces
where freezing
is
possible. When installed as outlined in manufacturer's
instructions, the heat cable will protect PVC and CPVC
lines from freezing without causing damage to pipes. The
heat cable
is 120VAC pro-assembled
self-regulating
electric cable. There are three heat cable kits available in
6 ft., 24 ft. and 50 ft. lengths (excluding 30" long cord set).
Fiberglass
and aluminum
tape are needed for each
installation. Table 1 lists all kits available from Lennox.
TABLE 1
DESCRIPTION
LB--NUMBER
CAT, NUMBER
6 F]_ HEAT CABLE KIT
LB- -88643A
26K68
24 FT HEAT CABLE KIT
LB- -88643B
26K69
50 FT HEAT CABLE KIT
LB- -88643C
26K70
66 FT FIBERGLASS TAPE KIT
LB--56532DA
39G04
60 FT ALUMINUM
FOILTAPE KIT LB--56534DA
39G03
NOTE - - Before installing heat cable kit, installer must
provide a 120V power source with cithara circuit breaker
or fuse suitable for handling required cable length. Do
not use an extension
cord to reach the receptacle. For
additional safe_ a ground-fault pretection device should
be installed. See heat cable manufacturer's
installation
instructions.
See table 2 to determine the length of heat cable needed
for specific run of PVC or CPVC pipe.
TABLE 2
LENGTH OF PIPE COVERED FOR
LENGTH OF HEAT CABLE
PIPE
SIZE
6 FT.
12 F3_
18 FT.
24 FT.
50 FT.
100 FT.
O.SlN. I 6
I 12 I 18 I 24 I 50 I 100
RUN CABLE STRAIGHT tl FT OF CABLE TO 1 F_ OF PIPE_
_nIN
I 3
I
6
I
g
I
_
I _s I
sn
SPIRAL CABLE
(2
F]_OFCABLE TO 1 FT OF
PIPE.)
3nIN
I _
I
4
I
R
I
R
I 1_7 I :_33
SPIRAL CABLE
(3
FI_OFCABLE TO 1 FT OF
PIPE.)
Table 2 assumes lowest outside temperature of 0°F with
a minimum of 1/2" fiberglass insulation or equivalent (i.e.
Armaflex.) For protection
to --20°F, use 1" fiberglass
insulation
or equivalent.
Multiple heat cable
may be
needed for longer runs of pipe.
1 - -The first 30" from plug end of the heat cable is the
cord set. This section does not get hot and should
not be wound around the pipe. To prevent damage
to the cord set, provide a strain relief using plastic
cable ties, or three thicknesses of either, vinyl, glass
cloth or heavy duct tape.
2--Wrap
heat cable around
pipe, condensate
trap
assembly or vent termination,
so that the cable is
pulled tight to ensure continuous contact between
the cable and the pipe. See figure 1.
Side View
If heat cable is longer
than pipe, spiral
cable evenly along pipe and according toT able 2.
Side View
End View
If pipe is 0.5" condensate
pipe, cable of same length
may be
run straight along pipe in either the 4 or 8 o'clock position.
FIGURE 1
3 - - After wrapping heat cable around pipe, secure cable
to the pipe using fiberglass tape. Wrap tape around
the pipe and cable using approximately
1-1/2 wraps
every foot. See figure 2. Do not use electrician's
tape, duct tape, vinyl tape, metal clamps or any
wire. Heat from the cable breaks down adhesive
properties of these tapes.
HEAT CABLE
ALUMINUM
FOIL TAPE
•
,,'-',_1 _
'
'/• . ..... _I INSULATION
?
,,J'
PVC or CPVC
\
PIPE
FIBERGLASS TAPE
(Wrap around pipe 1-1/2 times)
FIGURE 2
Page 1
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