NOTE:
A field-supplied, 115-v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.
IX.
DIRECT VENTING
The 350MAV Furnaces require a dedicated (one 350MAV furnace
only) direct-vent system. In a direct-vent system, all air for
combustion is taken directly from outside atmosphere, and all flue
gases are discharged to outside atmosphere.
A.
Removal of Existing Furnaces from Common
Vent Systems
When an existing Category I furnace is removed or replaced, the
orginal 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,
and spillage of combustion products into living space, etc.
TABLE 4—ELECTRICAL DATA
UNIT
SIZE
VOLTS—
HERTZ—
PHASE
OPERATING
VOLTAGE RANGE
MAX
UNIT
AMPS
UNIT
AMPACITY†
MIN
WIRE
SIZE
MAX WIRE
LENGTH
(FT)‡
MAX FUSE
OR CKT BKR
AMPS**
Max*
Min*
024040
115-60-1
127
104
6.1
8.4
14
44
15
036040
115-60-1
127
104
7.3
10.0
14
37
15
024060
115-60-1
127
104
6.1
8.4
14
44
15
036060
115-60-1
127
104
7.1
9.8
14
38
15
048060
115-60-1
127
104
9.5
12.8
14
29
15
036080
115-60-1
127
104
7.6
10.4
14
36
15
048080
115-60-1
127
104
10.0
13.4
14
28
15
060080
115-60-1
127
104
14.1
18.4
12
31
20
048100
115-60-1
127
104
10.2
13.5
14
27
15
060100
115-60-1
127
104
14.8
19.3
12
30
20
060120
115-60-1
127
104
14.6
19.1
12
30
20
060140
115-60-1
127
104
14.3
18.8
12
30
20
* Permissible limits of voltage range at which unit will operate satisfactorily.
† Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) full load
amps.
‡ Length shown is a measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
Fig. 28—Disconnect Switch and Furnace
A93033
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
Fig. 29—Relocating J-Box
A00212
FACTORY
INSTALLED
LOCATION
ALTERNATE
FIELD
LOCATION
—21—
Summary of Contents for CONDENSING GAS FURNACE 350MAV
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