YORK INTERNATIONAL
14
FORM 201.25-NM1 (302)
ant systems. The display will show the ‘highest prior-
ity’ information as determined by the microprocessor.
The main categories of messages are: General Status
Messages; Unit Warnings; Anticipation Control Status
Messages; Chiller Fault Status Messages; System Fault
Status Messages.
Display Keys
Each key provides a real-time display of commonly re-
quired information about the chiller and individual re-
frigerant system operating conditions and settings. This
is particularly useful during commissioning, monitor-
ing the operation of the chiller, diagnosing potential
future problems and service troubleshooting. Param-
eters may be displayed in Imperial (°F and PSIG) or
Metric (°C and bar) units.
Print Keys
These keys allow control panel display or remote print-
out of both current real-time operating and programmed
data as well as fault history data from the most recent
six safety shutdowns.
Entry Keys
The numeric and associated keys are used for enter-
ing data required for programming the chiller. The
‘ENTER’ and ‘ ’ ‘ ’ keys are also used for scroll-
ing through information available after pressing other
keys.
Setpoints Keys
These keys are used for display and programming of
the local and remote offset chilled liquid temperature
setpoints.
Clock Keys
These keys are used for display and programming of
the clock and operating schedule for the chiller.
Program Key
This key is used for display and programming of the
chiller operational settings and limits.
ACCESSORIES AND OPTIONS:
Alternative Refrigerants
Contact your nearest YORK office for information and
availability on alternative HFC refrigerants.
ELECTRICAL OPTIONS:
MULTIPLE POINT POWER SUPPLY CONNEC-
TION –
Standard
field power wiring connection on
all models is Multiple Point Power Connection to fac-
tory-provided Terminal Blocks. Two field-supplied elec-
trical power circuits with appropriate branch circuit pro-
tection provide power to each of two motor control cen-
ter cabinets, located on either side of the Control panel
on the front of the chiller. Each cabinet contains starter
elements for one compressor.
Optional
to the Terminal Blocks for field power con-
nection are Non-Fused Disconnects or Circuit Breaker
Switches with external, lockable handles.
SINGLE-POINT POWER CONNECTION – (Fac-
tory-mounted)
An optional configuration for field con-
nection of a single electrical circuit to: either Terminal
Block or Non-Fused Disconnect Switch with lockable
external handle (in compliance with Article 440 of
N.E.C., to isolate unit power supply for service). Fac-
tory wiring is provided from the Terminal Block or Dis-
connect Switch to Factory supplied individual system
Circuit Breakers, Non-Fused Disconnect switch with
external, lockable handle or J Class Fuses/Fuse Block
in each of the two compressor motor control centers.
(Note: Single-Point Non-Fused Disconnect Switch will
not be supplied with individual system Non Fused Dis-
connect Switches with external, lockable handles in each
of the two compressor motor control centers).
65 Ka HIGH VOLTAGE PROTECTION –
Non-
Fused Disconnect Switch with fuses (200 & 575V) or
Circuit Breakers (230, 380, & 460V) are used for ap-
plications where customers have a requirement for
Single-Point wiring with high “fault current” withstand-
ing capability. This option provides between 50Ka and
65Ka withstand protection to the equipment.
BUILDING AUTOMATION SYSTEM INTER-
FACE (Factory-mounted) –
Provides means to reset
the leaving chilled liquid temperature or percent full
load amps (current limiting) from the BAS
(Factory-
mounted):
• Printed circuit board to accept 4 to 20 milliamp, 0 to
10VDC, or dry contact closure input from the BAS.
•
A YORK ISN Building Automation System can
provide a Pulse Width Modulated (PWM) signal
direct to the standard control panel via the stan-
dard onboard RS485 port.
Product Description
