Removal Of Existing Furnaces From Common Vent Systems; Combustion Air And Vent Pipe Systems - Carrier 58MEB Installation, Start-Up, And Operating Instructions Manual

ACCESSORIES
1. Electronic Air Cleaner (EAC).
Two quick-connect terminals marked EAC-1 and EAC-2
are provided for EAC connection. (See Fig. 36.) These
terminals are energized with 115-v (1.0-amp maximum)
during blower motor operation.
CAUTION
!
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent
operation or performance satisfaction.
DO NOT connect furnace control HUM terminal to HUM
(humidifier) terminal on Thermidistatt, Zone Controller or
similar device. See Thermidistatt,
thermostat, or controller manufacturer's instructions for
proper connection.
2. Humidifier (HUM)
A quick-connect terminal (HUM) and screw terminal
(COM 24V) are provided for 24-v humidifier connection.
(See Fig. 36.) HUM terminal is energized with 24-v
(0.5-amp maximum) when gas valve is energized.
NOTE: A field-supplied, 115-v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during all blower operation.
Table 7 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials
ASTM
SPECIFICATION
MATERIAL
(MARKED ON
MATERIAL)
D1527 ABS
D1785
PVC
D2235 For ABS
D2241 PVC
D2466 PVC
D2468 ABS
D2564
For PVC
D2661 ABS
D2665 PVC
F438 CPVC
F441 CPVC
F442 CPVC
F493 For CPVC
F628
ABS
F656 For PVC
F891
PVC
Step 9—Removal of Existing Furnaces from
Common Vent Systems
When an existing Category I furnace is removed or replaced, the
original venting system may no longer be sized to properly vent
the remaining attached appliances. An improperly sized Category
I venting system could cause the formation of condensate in the
furnace and vent, leakage of condensate and combustion
products, spillage of combustion products into the living
space, etc.
Step 10—Combustion Air and Vent Pipe Systems
GENERAL
Vent system or vent connectors may need to be resized. For any
other appliances when resizing vent systems or vent connectors,
system or connector must be sized to approach minimum size as
Zone Controller,
determined using appropriate table found in the NFGC or
NSCNGPIC.
The 58MEB can be vented as either a direct vent or as a
non-direct vent application. A direct vent system shall be
installed in accordance with the direct vent (2-pipe) procedures in
the following Combustion Air and Vent Pipe Systems section. For
non-direct vent (1-pipe) applications, refer to the non-direct vent
(1-pipe) procedures in the same section.
SOLVENT CEMENT
PIPE FITTINGS
Pipe --- ---
Pipe --- ---
--- --- --- ---
Pipe --- ---
--- --- Fittings
--- --- Fittings
--- --- --- ---
Pipe Fittings
Pipe Fittings
--- --- Fittings
Pipe --- ---
Pipe --- ---
--- --- --- ---
Pipe --- ---
--- --- --- ---
Pipe --- ---
- - 30 - -
AND PRIMERS
--- ---
--- ---
Solvent Cement
--- ---
--- ---
--- ---
Solvent Cement
--- --- DWV at Schedule---40 IPS sizes
--- ---
--- ---
--- ---
--- ---
Solvent Cement
Cellular Core DWV at Schedule---40
--- ---
Primer
--- --- Cellular Core Schedule---40 & DWV
DESCRIPTION
Schedule---40
Schedule---40
For ABS
SDR---21 & SDR---26
Schedule---40
Schedule---40
For PVC
DWV
Schedule---40
Schedule---40
SDR
For CPVC
IPS sizes
For PVC