Preperation for Start-Up

STARTING THE UNIT

•In low ambient cooling 9-12 Btuh units, if a crankcase heater is installed, power the system 24 hours before attempting to start the unit in cool weather (below 60° F).

•After doing a final system check using the Operation Charts (supplied on pre- vious pages). Record results on Test Unit Data Sheet on page 26.

•Remove gauge set. Mount all access panels and make sure they are prop- erly secured.

•Make final visual inspection and repair any deficiencies.

Note: A hard start kit may be required for units in low voltage applications.

OPERATION AND MAINTENANCE

The S1C/H and S2C outdoor sections are the compressor bearing units of the system. It operates at the command of the indoor section or room thermostat. Therefore, the system operation will be described in the manual pertaining to the indoor section.

EMI units are designed and con- structed for reliability and long life with minimal maintenance. You can assure peak operating efficiency by regularly inspecting for free air passage into and through the coil. If debris collects on the air coil, it should be cleaned by "back-flushing" with a spray of water or vacuuming. TURN OFF POWER SUPPLY FIRST. Outdoor units may be cleaned or waxed if desired. Use a non-abrasive car wax (on metal surfaces only).

This unit is equipped with a perma- nently lubricated motor. Although oiling is not necessary, adding a few drops through the oiling ports twice yearly will extend the life of the motor. Do not over oil.

Panels should remain on the unit at all times. Service should be performed by a QUALIFIED service agency only.

SPECIFIC CHANGES

All EMI products are subject to on- going development programs so design and specifications may change without notice. Please consult the factory for more information.

Single-Zone and Dual-Zone Condenser Sequence of Operation

EMI America Series condensers are designed to operate with EMI America Series evaporators. Both the condenser (outdoor unit) and evaporator (indoor unit) have a high volt service connection. Each is to be independently connected to the electrical service panel. (See the unit name plate for the correct breaker type and size). The outdoor and indoor units are also connected to each other through a low volt interconnect wiring. A 24v trans- former located in the indoor unit provides the low volt power source.

Straight cool condensers are designed to operate as a single stage cooling unit. Heat pump condensers are designed to operate as a single stage cooling two stage heating unit. For proper operation the unit must be matched with an appro- priate EMI indoor unit with unit mounted controls and/or wall mounted thermostat. For two-stage heating operation the in- door unit must be equipped with an elec- tric strip heater.

Side Discharge Condensers