S/A
S/A
E'
CONTROL BOX
C
O
NT
RO
L B
O
X
W2
W1
Y2
Y1
G
C
R
R
Y1
G
C
W2
W1
Y2
ETB
LVTB
GROUNDING
FIELD WIRING
EARTH TERMINAL BLOCK
ELECTRONIC CONTROL BOARD
CIRCUIT BREAKER
HIGH VOLTAGE TERMINAL BLOCK
NEUTRAL TERMINAL BLOCK
NEUTRAL LINE
N
NTB
HVTB
CB
ECB
ETB
LEGEND:
UNIT CONTROL PANEL
L3
L2
L1
NTB
HVTB
DISCONNECT SWITCH
CB OR FUSED
INDOOR THERMOSTAT
380V UNITS ONLY
APPLICABLE FOR
L2
POWER
WIRES
L1
N
L3
INSTALLATION
1. Provide a concrete pad or another form of stand. Use 6-12 each rubber/cork pads 4" x 4" x 1" thick each (rubber-in-
shear for example) at each corner and along side rails, or use 6-12 each spring isolators.
2. Service Clearance: To avoid condenser air obstructions/recirculation, and to give adequate service space, indicated
clearances must be observed. See drawing below.
3. All wiring must comply with NEC (National Electrical Code) and local electrical codes. The electric supply must
comply with the unit nameplate. See the typical wiring diagram for guidance.
4. All units are pre-charged with R-22 and oil, sealed and tested for leaks. Therefore do not attempt to open the system.
5. Install a flexible connection for duct work to minimize vibration transmission. Connect drain pipe (copper or PVC) to the nearest drain pit.
6. Care should be taken in locating the roof curb & roof opening. The packaged unit should be adequately mounted on roof.
7. Install & secure ductwork to curb prior to mounting unit on the roof curb.
RECOMMENDED SERVICE CLEARANCE
– Multiply 'A' by 1.5 if nearby low walls exist.
– Multiply 'A' by 2.0 if nearby high walls exist.
– FOR MULTIPLE UNIT INSTALLATION, distance between adjacent unit = 2A.
NOTE
: There should not be any obstacles above condenser air discharge.
TYPICAL HIGH AND LOW VOLTAGE FIELD WIRING CONNECTIONS
13
