Table of Contents
Advertisement
IMPORTANT
Do not use screens or perforated metal in exhaust
terminations. Doing so will cause freeze−ups and
may block the terminations.
TABLE 6
MINIMUM VENT PIPE LENGTHS
G51MP
MIN. EQUIV.
MODEL
VENT LENGTH
045, 070,
090
110**
15 ft.*
135***
*Any approved termination may be added to the minimum equivalent length
listed.
**G51MP−48C−110 and G51MP−60C−110 must have 90° street ell (supplied or
field replacement Canadian kit) installed directly into unit flue collar.
***G51MP−60D−135 must have 3" to 2" reducing ell (supplied or field replace-
ment Canadian kit) installed directly into unit flue collar.
TABLE 7
MAXIMUM VENT PIPE LENGTHS
DIRECT (2 PIPE) AND NON−DIRECT (1 PIPE) APPLICATIONS
G51MP
ALTITUDE
MODEL
2" dia.
045
070
0 − 2000
090
(0 − 609 m)
110*
135**
045
070
2001 − 4500
090
(610 − 1371 m)
110*
135**
045
070
4501−7500
090
(1372−2286 m)
110*
135**
045
070
7501 − 10000
090
(2287 − 3048 m)
110*
135**
n/a −− Not allowed.
*G51MP−48C−110 and G51MP−60C−110 must have 90° street ell (supplied or
field replacement Canadian kit) installed directly into unit flue collar.
**G51MP−60D−135 must have 3" to 2" reducing ell (supplied or field replace-
ment Canadian kit) installed directly into unit flue collar.
***90° elbows used in configuration of G51MP−60D−135 vent, must be lim-
ited to 3" sweep elbows.
Joint Cementing Procedure
All cementing of joints should be done according to the
specifications outlined in ASTM D 2855.
EXAMPLE
5 ft. plus 2 elbows of 2", 2−1/2", 3"
or 4" diameter pipe
5 ft. plus 2 elbows of 2", 2−1/2", 3" or
4" diameter pipe
5 ft. plus 2 elbows of 3" or 4"
diameter pipe
MAXIMUM EQUIVALENT VENT
LENGTH FEET
2−1/2" dia.
3" dia.
4" dia.
110
135
160
70
135
160
50
100
125
30
70
125
n/a
n/a
***125
110
135
160
70
135
160
50
100
125
20
70
125
n/a
n/a
***90
110
135
160
70
135
160
30
100
125
n/a
70
125
n/a
n/a
***90
110
135
160
70
135
160
n/a
100
125
n/a
70
125
n/a
n/a
***90
DANGER OF EXPLOSION!
Fumes from PVC glue may ignite during system
check. Allow fumes to dissipate for at least 5 minutes
before placing unit into operation.
1 − Measure and cut vent pipe to desired length.
2 − Debur and chamfer end of pipe, removing any ridges
or rough edges. If end is not chamfered, edge of pipe
may remove cement from fitting socket and result in a
leaking joint.
3 − Clean and dry surfaces to be joined.
4 − Test fit joint and mark depth of fitting on outside of pipe.
5 − Uniformly apply a liberal coat of PVC primer for PVC or
use a clean dry cloth for ABS to clean inside socket
surface of fitting and male end of pipe to depth of fitting
socket.
NOTE − Furnace flue collar and air inlet fitting are both
made of ABS material. Use transition solvent cement
when joining ABS fittings to PVC pipe.
6 − Promptly apply solvent cement to end of pipe and in-
side socket surface of fitting. Cement should be ap-
plied lightly but uniformly to inside of socket. Take
care to keep excess cement out of socket. Apply sec-
ond coat to end of pipe.
250
NOTE − Time is critical at this stage. Do not allow prim-
250
er to dry before applying cement.
225
7 − Immediately after applying last coat of cement to pipe,
200
180
and while both inside socket surface and end of pipe
250
are wet with cement, forcefully insert end of pipe into
250
socket until it bottoms out. Turn PVC pipe 1/4 turn dur-
225
ing assembly (but not after pipe is fully inserted) to dis-
200
180
tribute cement evenly. DO NOT turn ABS or cellular
250
core pipe.
250
NOTE − Assembly should be completed within 20 sec-
225
onds after last application of cement. Hammer blows
200
180
should not be used when inserting pipe.
250
8 − After assembly, wipe excess cement from pipe at end
250
of fitting socket. A properly made joint will show a
225
200
bead around its entire perimeter. Any gaps may indi-
180
cate a defective assembly due to insufficient solvent.
9 − Handle joints carefully until completely set.
Venting Practices
The thickness of construction through which vent pipes
may be installed is 24" (610mm) maximum and 3/4"
(19mm) minimum.
1 − Use recommended piping materials for exhaust pip-
ing.
2 − Secure all joints, including drip leg, gas-tight using ap-
proved cement.
Page 19
WARNING
Hide quick links:
Advertisement
Table of Contents
