Two-Pipe Termination Kit (Direct Vent/2-Pipe System Only
Determine an appropriate location for termination kit using the
guidelines provided in section
″
Vent Termination: General
″
in this
instruction.
1. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size
being used.
2. Loosely install elbow in bracket and place assembly on
combustion-air pipe.
Roof terminations—Loosely install pipe coupling on prop-
erly cut vent pipe. Coupling must be positioned so bracket will
mount as shown in Fig. 43.
For applications using combustion-air pipe option, indicated
by dashed lines in Fig. 43, install 90° street elbow into 90°
elbow, making a U-fitting. A 180° U-fitting may be used.
Sidewall terminations—Install bracket as shown in Fig. 43.
For applications using vent pipe option indicated by dashed
lines in Fig. 40, rotate vent elbow 90° from position shown in
Fig. 40.
3. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping.
4. Check required dimensions as shown in Fig. 43.
Multiventing and Vent Terminations
When 2 or more 58MVB Furnaces are vented near each other, each
furnace must be individually vented. NEVER common vent or
breach vent 58MVB furnaces.
(Direct Vent/2-Pipe System ONLY)-When 2 or more 58MVB
furnaces are vented near each other, 2 vent terminations may be
installed as shown in Fig. 43, but next vent termination must be at
least 36 in. away from first 2 terminations. It is important that vent
terminations be made as shown in Fig. 43 to avoid recirculation of
flue gases.
Step 11—Condensate Drain
GENERAL
Condensate trap is shipped installed in the blower shelf and factory
connected for UPFLOW applications. Condensate trap must be
RELOCATED for use in DOWNFLOW and HORIZONTAL
applications.
Condensate trap MUST be used for all applications.
An external trap is not required when connecting the field drain to
this condensate trap.
The field drain connection (condensate trap or drain tube coupling)
is sized for 1/2-in. CPVC, 1/2-in. PVC, or 5/8-in. ID tube
connection.
Drain pipe and fittings must conform to ANSI standards and
ASTM D1785, D2466, or D2846. CPVC or PVC cement must
conform to ASTM D2564 or F493. Primer must conform to ASTM
F656. In Canada, use CSA or ULC certified schedule 40 CPVC or
PVC drain pipe, fittings, and cement.
When a condensate pump is required, select a pump which is
approved for condensing furnace applications. To avoid conden-
sate spillage, select a pump with an overflow switch.
Fig. 42—Short Vent (5 to 8 Ft) System
A05094
HORIZONTAL TO ROOF
HORIZONTAL TO SIDEWALL
VERTICAL TO SIDEWALL
VERTICAL TO ROOF
VENT PIPE
VENT PIPE
VENT PIPE
VENT PIPE
12
″
MIN
12
″
MIN
12
″
MIN
12
″
MIN
NOTE: A 12-In. minimum offset pipe section is recommended with
short (5-ft. to 8-ft) vent systems. This recommendation is to
reduce excessive condensate droplets from exiting the vent pipe.
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT
VENT/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
COMBUSTION AIR
PIPE (NON-DIRECT
VENT/1-PIPE)
COMBUSTION AIR
PIPE (DIRECT VENT
/2-PIPE)
40
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