Lennox International Inc. 10ACB - Manual (Page 3)

3DJH 
SETTING THE UNIT
Refer to unit dimensions on page 2 for sizing mounting
slab, platforms or supports. Refer to figure 1 for instal-
lation clearances.
INSTALLATION CLEARANCES
FIGURE 1
36
(914 mm)
*36
(914 mm)
36
(914 mm)
NOTE—48 inch clearance required on top of unit.
*NOTE—One side must be 36 inches. Two side may be 12”.
*36
(914 mm)
Slab Mounting
When installing unit at grade level, install on a level
slab high enough above grade to allow adequate drain-
age of water. Top of slab should be located so run--off
water from higher ground will not collect around unit.
Roof Mounting
Install unit at a minimum of 4 inches above the surface
of the roof. Care must be taken to ensure weight of unit
is properly distributed over roof joists and rafters. Ei-
ther redwood or steel supports are recommended.
ELECTRICAL
In the U.S.A., wiring must conform with current local
codes and the current National Electric Code (NEC). In
Canada, wiring must conform with current local codes
and the current Canadian Electrical Code (CEC). Refer to
the furnace or blower coil installation instructions for
additional wiring application diagrams and refer to
unit rating plate for minimum circuit ampacity and
maximum overcurrent protection size.
WARNING
Unit must be grounded in accordance with nation-
al and local codes. Electric Shock Hazard.
Can cause injury or death.
Line Voltage
To facilitate conduit, a hole is provided in bottom of the
control box. Connect conduit to hole in control box
with proper conduit fitting.
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WRUV RQO\
24V, Class II Circuit
24V, Class II Circuit connections are made up in the low
voltage junction box. Refer to figure 2 for field wiring
diagram.
NOTE -- A complete unit wiring diagram is located in-
side the unit control box cover.
TO
COOLING
SPEED
TO
HEATING
SPEED
; 4+ 9 / 40
CONDENSING UNIT
TYPICAL INDOOR UNIT
ROOM THERMOSTAT
POWER
GROUND
PER NATIONAL
AND LOCAL
CODES
24v
TRANSFORMER
24V
CLASS II
JUNCTION
BOX
TO
HEATING
CONTROLS
TO 24V CLASS II POWER SOURCE
-- 20 VA MINIMUM
K3 INDOOR BLOWER RELAY
NOTE--IF INDOOR UNIT IS NOT EQUIPPED WITH
BLOWER RELAY, IT MUST BE FIELD PROVIDED
AND INSTALLED (P--8--3251 OR EQUIVALENT)
NOTE--SEE UNIT WIRING DIAGRAM
FOR POWER SUPPLY CONNECTIONS.
24V CLASS II INSTALLED AT FACTORY
24V CLASS II FIELD INSTALLED
FIGURE 2
Y1
C
+
T1
R
W1
G
C
W2
10ACB TYPICAL FIELD WIRING DIAGRAM