York YCAL0041 - Manual (Page 77)

YORK INTERNATIONAL 77
FORM 150.64-EG1
of N.E.C.) can be supplied to isolate the unit
power voltage for servicing. Separate external
fusing must be supplied, by others, in the in
coming power wiring, which must comply with
the National Electric Code and/or local codes.
4. Single Point Disconnect with Individual System
Breakers: Single point Terminal Block with Non-
Fused Disconnect and lockable external handle
(in compliance with Article 440-14 of N.E.C.)
can be supplied to isolate power voltage for
servicing. Factory interconnecting wiring from
disconnect to factory supplied circuit breakers.
Available on YCAL0041-0065.
5. Single Point Circuit Breaker: Single point Ter-
minal Block with Circuit Breaker and lockable
external handle (in compliance with Article 440
14 of N.E.C.) can be supplied to isolate power
voltage for servicing. Incoming power wiring
must comply with the National Electric Code
and/or local codes. Single Point Circuit Break
ers available on YCAL0041-0065 models.
D. Pressure Transducers and Readout Capability
1. Discharge Pressure Transducers: Permits unit
to sense and display discharge pressure. Stan-
dard on YCAL0080-0134 models.
E. Control Power Transformer: Converts unit power
voltage to 120-1-60 (500 VA capacity). Factory-
mounting includes primary and secondary wiring
between the transformer and the control panel.
F. Motor Current Module: Capable of monitoring com-
pressor motor current. Provides extra protection
against compressor reverse rotation, phase-loss
and phase imbalance. Option consists of one mod-
ule per electrical system. (Factory-mounted.)
G. Power Factor Correction Capacitors: Provided to
correct unit compressor factors to a 0.90-0.95.
H. Condenser Coil Environmental Protection:
1. Pre-Coated: Epoxy coated aluminum fin stock to
guard from corrosive agents and insulate
against galvanic potential. For mild seashore
or industrial locations.
2. Copper Fin: Provide copper fins in lieu of alumi-
num.
3. Post-Coated Dipped: Dipped-cured coating on
condenser coils for seashore and other corro-
sive applications (with the exception of strong
alkalis, oxidizers, and wet bromine, chlorine and
fluorine in concentrations greater than
100ppm).
I. Protective Chiller Panels (Factory or Field Mounted
1. Louvered Panels (condenser coils only):
Painted steel as per remainder of unit cabinet,
over external condenser coil faces.
2. Wire Panels (full unit): Heavy gauge, welded
wire-mesh, PVC -coated to resist corrosion, to pro-
tect condenser coils from incidental damage
and restrict unauthorized access to internal
components.
3. Louvered Panels (full unit): Painted steel as per
remainder of unit cabinet, to protect condenser
coils from incidental damage, visually screen
internal components, and prevent unauthorized
access to internal components.
4. Louvered/Wire Panels: Louvered steel panels
on external condenser coil faces, painted as
per remainder of unit cabinet. Heavy gauge,
welded wire-mesh, coated to resist corrosion,
around base of machine to restrict unauthorized
access.
J. Flow Switch (Field-mounted): Vapor proof SPDT,
NEMA 4X switch ( ___150 PSIG or ___300 PSIG),
-20°F to 250°F.
K. Differential Pressure Switch: Alternative to an
above mentioned flow switch. Pretempco model
DPS300A-P40PF-82582-5 (300 psi max. working
pressure) SPDT 5 amp 125/250VAC switch, Range
0 - 40 PSID, deadband 0.5 - 0.8 psi, with 1/4” NPTE
Pressure Connections.
L. Evaporator options:
1. Provide 1½" cooler insulation in lieu of standard
¾".
2. Provide DX Cooler with 300 PSIG water-side
design working pressure in lieu of standard 150
PSIG.
3. Provide Raised Face Flanges for field instal-
lation on cooler nozzles and field piping:
a. 150 PSIG, welded Flanges.
b. 300 PSIG, welded Flanges.
M. Service Isolation valves: Service suction and dis
charge (ball type) isolation valves are added to unit
per system. This option also includes a system high
pressure relief valve in compliance with ASHRAE
15. (Factory-mounted.)
N. Remote Cooler: Manufacturer shall provide sep-
arately: chiller less evaporator, leaving and return