Direct Venting; Removal Of Existing Furnaces From Common Vent Systems - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

EAC-ELECTRONIC AIR
CLEANER TERMINALS
(115-VAC 1 AMP MAX)
MAIN BLOWER
CONTROL WIRE
CONNECTOR
CONTINUOUS
FAN (CF) SETUP
Fig. 26—EAC Terminals on Control Center
NOTE: A field-supplied, 115-v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.
3. Dehumidification (DH)
A 1/4-in. male quick-connect terminal is provided on control
center to attach a normally open (N/O) humidistat contact
when dehumidification is desired. (See Fig. 25.) Connect
humidistat to thermostat R terminal and DH terminal on
control center. A 15 percent reduction of cooling airflow or
constant fan airflow will occur when DH terminal is energized
and a single- or 2-speed "call for cooling" is received.

DIRECT VENTING

The 58MVP Furnaces require a dedicated (one 58MVP furnace
only) direct vent system. In a direct vent system, all air for
TRANSFORMER
24-V CONNECTORS
SWITCHES
COMMUNICATION
CONNECTOR
Fig. 25—Control Center
A93053
HOT SURFACE
IGNITOR CONNECTOR
115-V
CONNECTORS
PRESSURE SWITCH
CONNECTOR
24-V THERMOSTAT
TERMINALS
DEHUMIDIFIER (DH)
CONNECTOR
3-AMP FUSE
STATUS AND DIAGNOSTIC
LED LIGHTS
AIR CONDITIONING
(A/C) SETUP SWITCH
SETUP SWITCHES
(SW) AND BLOWER
OFF DELAY SETUP
SWITCHES
MODEL PLUG
combustion is taken directly from outside atmosphere, and all flue
products are discharged to outside atmosphere.
Step 1—Removal of Existing Furnaces from
Common Vent Systems
If furnace being replaced was connected to a common vent system
with other appliances, these steps shall be followed with each
appliance remaining connected to common vent system placed in
operation, while other appliances remaining connected to common
vent system are not in operation:
1. Seal any unused openings in common vent system.
2. Visually inspect vent system for proper size and horizontal
pitch. Determine there is no blockage or restriction, leakage,
corrosion, and other deficiencies which could cause an unsafe
condition.
3. Insofar as is practical, close all building doors and windows
and all doors between space in which appliances remaining
connected to common vent system are located and other
spaces of building. Turn on clothes dryers and any appliance
not connected to common vent system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so they
operate at maximum speed. Do not operate a summer exhaust
fan. Close fireplace dampers.
4. Follow lighting instructions and place appliance in operation.
Adjust thermostat so appliance operates continuously.
5. Test for flue gas spillage at drafthood relief opening after 5
minutes of main burner operation. Use flame of a match or
candle, etc.
6. After it has been determined that each appliance remaining
connected to common vent system properly vents when tested
as above, return doors, windows, exhaust fans, fireplace
20
HUM-HUMIDIFIER
TERMINAL
(24-VAC 0.5 AMP MAX)
A93062