Goodman Mfg VC8 - Manual (Page 16)

16
E
LECTRICAL
C
ONNECTIONS
J
UNCTION
B
OX
R
ELOCATION
E DGES OF SHEET METAL HOLES MAY BE SHARP . U SE GLOVES AS A
PRECAUTION WHEN REMOVING HOLE PLUGS .
WARNING
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a right
side electrical connection. To make electrical connections
through the opposite side of the furnace, the junction box must
be relocated to the left side prior to making electrical connec-
tions. To relocate the junction box, perform the following steps.
T O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK ,
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
UNIT .
WARNING
1. Remove both doors from the furnace.
2. Remove and save the screws holding the junction box to
the right side of the furnace.
3. Models that have the junction box located in the burner
or blower compartment will need to move the junction
box directly over.
4. Attach the junction box to the left side of the furnace,
using the screws removed in step 2.
5. Check the location of the wiring. Confirm that it will not
be damaged by heat from the burners or by the rotation
of the fan. Also confirm that wiring location will not
interfere with filter removal or other maintenance.
After the junction box is in the desired location, use washers to
connect field-supplied conduit to the junction box in accordance
with NEC and local codes. Connect hot, neutral, and ground
wires as shown in the furnace wiring diagram. The wires and
ground screw are located in the furnace junction box.
NOTE: In downflow applications the power leads should be
routed through the supplied wire tabs when locating junction
box to the left side.
Low voltage wires may be connected to the terminal strip.
IMPORTANT NOTE: To avoid possible equipment malfunction,
route the low voltage wires to avoid interference with filter re-
moval or other maintenance.
HIGH VOLTAGE !
T O AVOID THE RISK OF INJURY , ELECTRICAL SHOCK OR
DEATH , THE FURNACE MUST BE ELECTRICALLY
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
THEIR ABSENCE , WITH THE LATEST EDITION OF THE
N ATIONAL E LECTRIC C ODE .
WARNING
To ensure proper unit grounding, the ground wire should run
from the furnace ground screw located inside the furnace junc-
tion box all the way back to the electrical panel. NOTE: Do
not use gas piping as an electrical ground. To confirm proper
unit grounding, turn off the electrical power and perform the
following check.
1. Measure resistance between the neutral (white)
connection and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch
which interrupts unit voltage when the blower door is opened for
servicing. Do not defeat this switch.
24 V
OLT
T
HERMOSTAT
W
IRING
W IRE ROUTING MUST NOT INTERFERE WITH CIRCULATOR BLOWER
OPERATION , FILTER REMOVAL OR ROUTINE MAINTENANCE .
A REMOVABLE PLUG CONNECTOR IS PROVIDED WITH THE CONTROL TO
MAKE THERMOSTAT WIRE CONNECTIONS . T HIS PLUG MAY BE REMOVED ,
WIRE CONNECTIONS MADE TO THE PLUG , AND REPLACED . I T IS
RECOMMENDED THAT MULTIPLE WIRES INTO A SINGLE
TERMINAL BE TWISTED TOGETHER PRIOR TO INSERTING INTO THE PLUG
CONNECTOR . F AILURE TO DO SO MAY RESULT IN INTERMITTENT
OPERATION .
STRONGLY
IMPORTANT NOTE
As a two-stage non-communicating furnace, the furnace inte-
grated control module provides terminals for both “W1” and “W2”,
and “Y1” and “Y2” thermostat connections. This allows the
furnace to support the following system applications: ‘Two-
Stage Heating Only’, ‘Two-Stage Heating with Single Stage Cool-
ing’, and ‘Two-Stage Heating with Two-Stage Cooling’. Refer to
the following figures for proper connections to the integrated
control module.
Low voltage connections can be made through either the right
or left side panel. Thermostat wiring entrance holes are located
in the blower compartment. The following figure shows con-
nections for a “heat/cool system”.
This furnace is equipped with a 40 VA transformer to facilitate
use with most cooling equipment. Consult the wiring diagram,
located on the blower compartment door, for further details of
115 Volt and 24 Volt wiring.
NOTE: For single stage cooling applications, a jumper must
be located between Y1 and Y2 at the furnace control in order
to achieve the desired single stage cooling airflow. Use of
ramping profiles and dehumidification features require a
jumper between Y1 and O and Y1 and DEHUM, respectively.
NOTE: Thermostat “R” required if outdoor unit is equipped
with a Comfort Alert™ module or if the out door unit is a part
of the ComfortNet™ family of equipment AND is wired as a
legacy system.