MICRO-AIR EasyStart 364, EasyStart 368 Installation Manual

EasyStart

364 (3 ton) Soft Starter
368 (6 ton) Soft Starter

Installation Manual

Micro-Air Corporation www.microair.net
124 Route 526 Phone [phone]
Allentown NJ 08501 Fax [phone]

©2018 Micro-Air Corp 6/6/2018 Rev 1.08

Retrofit Instructions:

1. Read and understand these instructions completely before proceeding. Improper wiring can result in

damage to EasyStart or connected components including but not limited to wiring, compressors, and
capacitors. Micro-Air Corp is not responsible for damages to any of the aforementioned equipment
caused by improper wiring.

2. Turn off the breaker for the compressor’s electrical system.

3. Identify an appropriate location for EasyStart that allows mounting with the EasyStart wire exit pointing

down. Securely mount the EasyStart box and route the wiring into the existing run capacitor location. Be
sure to secure the harness to prevent vibration or movement damage.

4. Consult the manufacturers installation manual and wiring diagram for the identification of the following:
a. Compressor R, C, and S terminals and associated wire color for each connection. Compressors

have a plastic cap with a single hex nut covering the connections. Wires can usually be identified
without removing this cover however the cover or markings near the terminals can also be used to
identify the wires.

b. Run capacitor (typically in a metal can). This capacitor will have 2 or 3, multi-point terminal

group connections.

c. Control board switched-L1 output or main contactor compressor L1 output connecting to the

compressor common ‘C’ terminal wire. Note some systems utilize a contactor to switch power to
the compressor, other use a power relay integrated into the main control board.

5. Identify the wire color connected to the compressor “S” terminal and follow the wire to the run capacitor.

Disconnect any other wire connected to the same terminal group. Follow the disconnected wire and remove
it from the connector on other end. If the wire goes into a PTC device simply follow the second wire
coming from the device, disconnect it and remove the PTC. Not all systems will have a second wire on this
terminal group.

6. Connect the orange wire from EasyStart to the same terminal group identified in step 5.

7. Locate the wire connected from the compressor run winding ‘R’ terminal to the run capacitor ‘C’ terminal,

and disconnect it from the run capacitor. Connect (splice) the brown wire from EasyStart to the
disconnected wire.

8. For compressors under 3 tons (36 KBTU), connect the white wire from EasyStart to the same terminal of

the run capacitor from which you disconnected the (white) run winding ‘R’ wire in step 7 above. For all
other compressors, splice the white wire to the L2 wire that feeds the run capacitor or connect it to the L2
connection at the contactor.

9. Connect the black wire from EasyStart to the switched-L1 connection coming from the main control board

or main contactor that typically has a black or purple wire that connects to the compressor common ©
terminal wire.

10. Wiring is now complete. Close all open electrical boxes and panels.

11. Turn on the system circuit breaker using shore power. Start a heating or cooling cycle with the thermostat.

12. EasyStart will now learn the characteristics of the compressor for the next five starts. This operation can be

done during normal operation and does not require any intervention or special actions. Once the learning
process is completed, the EasyStart can be operated on either shore or generator power. You must wait five
minutes after the compressor stops for the compressor to restart. See “Anti-Short Cycle Timer” for details.

IMPORTANT INSTALLATION NOTE FOR CRUISAIR® MARINE CUSTOMERS ONLY:
When installing EasyStart into 230V SMX control applications that use the triac to switch power to the
compressor, it is necessary to replace the triac with a relay. If the triac is not replaced, the pump relay
triggers may suffer damage and ultimately fail. Please note that this is not required for 115V SMX
applications and the triac is still safe to use. Visit the Micro-Air website or contact Micro-Air for details
on the appropriate relay.

©2018 Micro-Air Corp 6/6/2018 Rev 1.08