5
©2020 Micro-Air Corp.
Rev 1.5
5.
Are the original start devices removed?
The Easiest way to check for start devices is to look at the connections on the run
capacitor. There are two styles of run capacitor as shown below. The right capacitor has
markings for each terminal (F or FAN, H or HERM, and C) while the left will have no
markings:
Notice that on the capacitors there are previsions for multiple connections. These
connections are organized into groups of one to four connections.
The “S” wire followed at
the end of the previous step should connect to the HERM terminal on the three-terminal
capacitor and one of the two terminals on the two-terminal capacitor. This terminal group
on two terminal capacitors can be considered the HERM terminal group. The Orange wire
from EasyStart must connect to HERM terminal group.
Remove any additional wires connected to the HERM terminal group. These wires
connect to start components that are no longer used and must be removed. Follow the
wires to their end connections. If the connection is a spade style connection to a run
capacitor or circuit board, simply remove the wire. If the wire goes to a PTC device then the
device will have two wires going into it. Follow the second wire and disconnect it from its
connector. You can remove the PTC completely if desired as it is no longer used.
6.
Is the white wire from EasyStart connected to L2 on the correct terminal on the run
capacitor?
In most installations (see exceptions below) the white wire from EasyStart will be
installed on a terminal group on the run capacitor. For run capacitors with 3 terminals the
white wire should be connected to the “C” terminal. For
run capacitors with two terminals
the white wire from EasyStart should be connected to the terminal group opposite the
HERM terminal group.
Exceptions:
Compressors larger than 3 tons (36 KBTU) must connect the white wire directly
to line L2. Run capacitor terminals are not rated to carry currents found in these larger
systems.
