4
E-mail: [email protected]
Made in Rome, New York, USA
COMMON TO ALL AIR HANDLERS
Continued
ELECTRICAL WIRING
(SEE THE APPROPRIATE AIR HANDLER SECTION FOR
SPECIFIC WIRING INFORMATION.)
All wiring should be in accordance with the National Elec-
tric Code (NEC) and the local building codes.
1. Inspect the existing wiring for any deficiencies such
as cut or frayed wires. Replace such wiring if found.
2. Check the unit rating plate for circuit ampacity and
breaker or fuse size.
Use only HACR type break-
ers.
Select the proper wire for the ampacity rating.
3. Each unit must have a separate branch circuit pro-
tected by a fuse or breaker. Refer to the unit rating
plate for the proper wire and breaker or fuse size.
4. Connect the power wire to Black (L1) and the other
wire to Red/White (L2) at the power connector loca-
tion. Connect the ground wire to the ground lug lead
at the same location in the control box.
5. Low voltage wiring must be run to the outdoor unit
and thermostat. Refer to the Wiring Diagram on the
unit for details. Be sure to use at least 18 AWG wire.
(Figures 1, 2 or 3)
FINAL INSTALLATION CHECKS
The unit filter must be in place and able to be removed
easily for maintenance. To avoid vibration, check refriger-
ant lines/chilled water lines to ensure they are not in con-
tact with each other. The unit(s) must be mounted securely
and level.
EMI indoor units do not contain a low volt trans-
former. Low volt power is supplied by a trans-
former located in the condenser. If using a con-
denser made by other manufacturers, a low volt
40VA transformer needs to be supplied by the in-
staller.
NOTE:
On units rated 208/230V, the primary side
of the transformer is factory wired for 230V. For
a 208V power supply, the transformer tap must
be changed from orange to red.
IMPORTANT: When wiring the WHP 18–36 only: If
the job site voltage is 208V, the WHP high-low fan
speed switch must be rewired. Replace the black
and red fan motor wire connections with the blue
and orange fan motor wires respectively.
See unit wire diagram for specific details.
Figure 2
Figure 1
Figure 3
INITIAL START-UP
The unit will start in time delay (unit mount controls
only). These are the default settings of the unit mount I/R
control microprocessor. Once temperature and mode se-
lections have been made, they will be stored in the micro-
processor memory when the unit is switched off. The next
time the unit is switched back on via the
On/Off
switch, the
stored settings will be used and the unit will resume opera-
tion.
Unit Mount Controls Only
*** CONNECTIONS ONLY
FOR HEATPUMPS
I.D. UNIT
INTERCONNECT DIAGRAM
O.D. UNIT
YEL
WHT
ORG
(O)
(Y)
(W)
RED
BRN
(R)
(C)
LOW VOLTAGE
***
***
YEL
WHT
ORG (O)
(Y)
(W)
BRN
RED (R)
(C)
UNIT MOUNT CONTROL
