Wiring Diagrams-Across-The-Line Start And Wye-Delta Start (Ycas0250 - Ycas0330) - York MILLENNIUM YCAS 250 Manual

Technical Data
WIRING DIAGRAM (YCAS0250 - YCAS0330)
NOTES:
1. Field wiring to be in accordance with the current edition
of the National Electrical Code as well as all other appli-
cable codes and specifications.
2. Numbers along the right side of a diagram are line identi-
fication numbers. The numbers at each line indicate the
line number location of relay contacts. An unlined con-
tact location signifies a normally closed contact. Num-
bers adjacent to circuit lines are the circuit identification
numbers.
3. Any customer supplied contacts must be suitable for
switching 24VDC. (Gold contacts recommended.) Con-
trol Wiring must not be run in the same conduit with any
line voltage wiring.
4. To cycle unit ON and OFF automatically with contact
shown, install a cycling device in series with the flow
switch (FSLW). See Note 3 for contact rating and wiring
specifications. Also refer to cautions on page 63A.
5. To stop unit (Emergency Stop) with contacts other than
those shown, install the stop contact between 5 and 1. If a
stop device is not installed, a jumper must be connected
between terminals 5 and 1. Device must have a minimum
contact rating of 100VA at 115 volts A.C.
6. Alarm contacts are for annunciating alarm/unit malfunc-
tion. Contacts are rated at 115V, 100VA, resistive load
only, and must be suppressed at load by user.
7. See Installation, Operation and Maintenance Manual when
optional equipment is used.
8. Control panel to be securely connected to earth ground.
9. Us 2KVA transformer in optional transformer kit unless
there are optional oil separator sump heaters which neces-
sitates using a 3KVA transformer.
FIG. 17 – CONTROL POWER TRANSFORMER KIT
58
ACROSS-THE-LINE START
WYE-DELTA START
CONTROL POWER TRANSFORMER KIT
AND
T S Transient Voltage Suppression
Terminal Block for Customer Connections
Terminal Block for Customer Low Voltage
(Class 2) Connections. See Note 2
Terminal Block for YORK Connections Only
Wiring and Components by YORK
Optional Equipment
Wiring and/or Components by Others
LEGEND
YORK INTERNATIONAL
LD04186