Goodman MEC96 Series Instruction Manual page 24

HIGH VOLTAGE !
T
O AVOID PERSONAL INJURY OR DEATH DUE TO
,
ELECTRICAL SHOCK DISCONNECT ELECTRICAL POWER
BEFORE SERVICING OR CHANGING ANY ELECTRICAL
.
WIRING
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
. W
CONTROLS IRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
. V
OPERATION ERIFY PROPER OPERATION AFTER SERVICING
115 Volt Line Connections
Before proceeding with electrical connections, ensure that
the supply voltage, frequency, and phase correspond to that
specified on the unit rating plate. Power supply to the furnace
must be NEC Class 1, and must comply with all applicable
codes. The furnace must be electrically grounded in accor-
dance with local codes or, in their absence, with the latest
edition of The National Electric Code, ANSI NFPA 70 and /
or The Canadian Electric Code CSA C22.1.
Use a separate fused branch electrical circuit containing prop-
erly sized wire, and fuse or circuit breaker. The fuse or circuit
breaker must be sized in accordance with the maximum
overcurrent protection specified on the unit rating plate. An
electrical disconnect must be provided at the furnace location.
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit's blower door. For direct vent
applications, the cabinet opening to the junction box must be
sealed air tight using either an UL approved bushing such as
Heyco Liquid Tight or by applying non-reactive UL approved
sealant to bushing.
Line polarity must be observed when making field connec-
tions. Line voltage connections can be made through either
the right or left side panel. The furnace is shipped configured
for a left side electrical connection with the junction box
located inside the burner compartment. To make electri-
cal connections through the opposite side of the furnace,
the junction box must be relocated to the other side of the
burner compartment prior to making electrical connections.
To relocate the junction box, follow the steps shown below.
NOTE: Wire routing must not to interfere with circulator
blower operation, filter removal, or routine maintenance.
Junction Box Relocation
E
DGES OF SHEET METAL HOLES MAY BE SHARP
PRECAUTION WHEN REMOVING HOLE PLUGS
WARNING
CAUTION
.
WARNING
. U
SE GLOVES AS A
.
T
O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
.
UNIT
HIGH VOLTAGE !
T
O AVOID THE RISK OF INJURY
,
DEATH THE FURNACE MUST BE ELECTRICALLY
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
,
THEIR ABSENCE WITH THE LATEST EDITION OF THE
N E C
ATIONAL LECTRIC ODE
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a left
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
connections. To relocate the junction box, perform the fol-
lowing steps.
1. Remove the burner compartment door.
2. Remove and save the two screws securing the junction
box to the side panel.
3. Relocate junction box and associated plugs and
grommets to opposite side panel. Secure with screws
removed in step 2.
To ensure proper unit grounding, the ground wire should run
from the furnace ground screw located inside the furnace
junction 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 per-
form 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 Volt Thermostat Wiring
IMPORTANT NOTE
W
IRE ROUTING MUST NOT INTERFERE WITH CIRCULATOR BLOWER
,
OPERATION FILTER REMOVAL OR ROUTINE MAINTENANCE
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 connections 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.
24
WARNING
WARNING
,
ELECTRICAL SHOCK OR
.
,
.