CONNECTING ELECTRICAL POWER CIRCUIT TO COOLING Unit
(see Figures 5 and 9)
IMPORTANT: Before 208/230VAC single-phase 60Hz electrical power circuit is connected to the cooling unit, service power voltage entering the building must be identified. Service power voltage entering the building will either be 208 or 230VAC and may be posted on the main service box. If not, the installer must contact the local electrical power company for information. If these two voltage identification attempts should fail, a voltage reading Must be performed. If service power voltage is below 218VAC, the red electrical wire connected to the 240VAC terminal on LINE (primary) side of the 240/24VAC power transformer inside the cooling unit switches electrical control box (see Figure 3 and 9) must be disconnected from the 240VAC terminal and be connected to the 208VAC terminal. If voltage is above 218VAC, power transformer red electrical wire will remain connected to the 240VAC terminal. If installer is not sure of the service power voltage entering the building, leave red electrical wire connected to the 240VAC terminal on the power transformer. If service power voltage is below 218VAC, proceed as follows:
1.Remove four screws securing electrical control box cover, then remove cover for access to the 240/24VAC power transformer.
2.Remove red electrical wire from the 240VAC terminal on LINE (primary) side of power transformer and connect it to the 208VAC terminal.
C
208V 
240V
RESET BUTTON
FIGURE 3. 240/24VAC POWER TRANSFORMER
WARNING: Make sure 40-amp minimum-rated disconnect switch (not provided) is in ‘‘OFF’’ position.
1. Remove cover from electrical handy box on back of Cooling Unit.
WARNING: The Cooling Unit must be electrically grounded to avoid possible fatal electrical shock or serious injury to the operator. A green ground wire is provided inside electrical box to connect power circuit ground wire which electrically grounds the Cooling Unit.
Connect 208/230VAC Single-Phase 60Hz power circuit from 40-amp minimum rated disconnect switch (not provided) fused at 40-amps (‘slow-blow’) to electrical wires inside electrical handy box on back of Cooling Unit.
COOLING UNIT MUST BE PROPERLY GROUNDED. POWER CIRCUIT MUST BE MADE UP OF COPPER CONDUCTORS, AND ALL WIRING MUST CONFORM TO NATIONAL AND LOCAL ELECTRICAL CODES.
DO NOT CONNECT ELECTRICAL POWER TO COOLING UNIT AT THIS TIME.
