JOHNSON CONTROLS
102
voltage for servicing. Incoming power wiring
must comply with the National Electric Code
and/or local codes. Single Point Circuit Break
ers available on YCAL0014-0080 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 n stock to
guard from corrosive agents and insulate
against galvanic potential. For mild seashore
or industrial locations.
2. Copper Fin: Provide copper ns 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, 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 ow switch. Pretempco model
DPS300A-P40PF-82582-5 (300 psi max. working
pressure) SPDT 5 amp 125/250VAC switch, Range
3 - 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 eld instal-
lation on cooler nozzles and eld 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 sepa-
rately: chiller less evaporator, leaving and return
water sensors, and liquid line components (solenoid
valves, lter driers, sight glasses, and TXVs), as
discrete elements of a complete factory system.
Contractor shall be eld erect system and provide
interconnecting refrigerant piping and wiring in
accordance with Manufacturer recommendations,
and project plans and schedules. Where not oth-
erwise specied, Contractor provided system piping
shall be in accordance with applicable sections of
ASHRAE Handbook.
O. Hot Gas By-Pass: Permits continuous, stable op-
eration at capacities below the minimum step of
unloading to as low as 5% capacity (depending on
both the unit & operating conditions) by introducing
an articial load on the cooler. Hot gas by-pass is
installed on only one refrigerant circuit.
Guide Specications – continued
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