-- 30 --
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.
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 Thermidistat
t
, Zone Controller or
similar device. See Thermidistat
t
, Zone Controller,
thermostat, or controller manufacturer’s instructions for
proper connection.
CAUTION
!
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.
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
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.
Table 7 –
Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials
ASTM
SPECIFICATION
(MARKED ON
MATERIAL)
MATERIAL
PIPE
FITTINGS
SOLVENT CEMENT
AND PRIMERS
DESCRIPTION
D1527
ABS
Pipe
--- ---
--- ---
Schedule---40
D1785
PVC
Pipe
--- ---
--- ---
Schedule---40
D2235
For ABS
--- ---
--- ---
Solvent Cement
For ABS
D2241
PVC
Pipe
--- ---
--- ---
SDR---21 & SDR---26
D2466
PVC
--- ---
Fittings
--- ---
Schedule---40
D2468
ABS
--- ---
Fittings
--- ---
Schedule---40
D2564
For PVC
--- ---
--- ---
Solvent Cement
For PVC
D2661
ABS
Pipe
Fittings
--- ---
DWV at Schedule---40 IPS sizes
D2665
PVC
Pipe
Fittings
--- ---
DWV
F438
CPVC
--- ---
Fittings
--- ---
Schedule---40
F441
CPVC
Pipe
--- ---
--- ---
Schedule---40
F442
CPVC
Pipe
--- ---
--- ---
SDR
F493
For CPVC
--- ---
--- ---
Solvent Cement
For CPVC
F628
ABS
Pipe
--- ---
--- ---
Cellular Core DWV at Schedule---40
IPS sizes
F656
For PVC
--- ---
--- ---
Primer
For PVC
F891
PVC
Pipe
--- ---
--- ---
Cellular Core Schedule---40 & DWV
