Johnson Controls YORK YCAL0041EC, Установка, эксплуатация и обслуживание, Страница: 20 / 168

JOHNSON CONTROLS
20
FORM 150.66-NM1 (708)
Product Description
COMPRESSOR, PIPING, EVAPORATOR OPTIONS
LOW TEMPERATURE BRINE – Required for brine
chilling below 30°F (-1°C) leaving brine temperature
for YCAL0041 - 0071 models. Option includes resized
thermal expansion valve (
Factory-Mounted ).
CHICAGO CODE RELIEF VALVES – Unit will
be provided with relief valves to meet Chicago code
requirements (
Factory-Mounted ).
SERVICE ISOLATION VALVE – Service suction
and discharge (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 ).
HOT GAS BY-PASS – Permits continuous, stable
operation at capacities below the minimum step of com-
pressor unloading to as low as 5% capacity (depending
on both the unit and operating conditions) by introduc-
ing an artifi cial load on the cooler. Hot gas by-pass is
installed on only refrigerant system #1 on two-circuited
units (
Factory-Mounted ).
DX COOLER 300 PSIG (21 bar) DWP WATERSIDE
–
The waterside will be of 300 PSIG (21 bar) instead of
the standard 150 PSIG DWP. 300 PSIG R.F. fl anges are
included on the DX cooler nozzles (
Factory-Mounted ).
The companion fl anges will be fi eld-supplied by oth-
ers.
FLANGES (VICTAULIC TYPE) – Consists of two
(2) Flange adapters for grooved end pipe (standard 150
psi [10.5 bar] cooler).
FLOW SWITCH – The fl ow switch or its equivalent
must be furnished with each unit.
150 PSIG (10.5 bar) DWP –
For standard units. Johnson
Controls model F61MG-1C Vapor-proof SPDT, NEMA
4X switch (150 PSIG [10.5 bar] DWP), -20°F to 250°F
(-29°C to 121°C), with 1” NPT connection for upright
mounting in horizontal pipe (
Field-Mounted
).
300 psig (21 bar) DWP –
For units with optional 300
PSIG (21 bar) DX cooler. McDonnell & Miller model
FS74W Vapor-proof SPDT, NEMA 4X switch (300
PSIG (21 bar) DWP), -20°F to 300°F (-29°C to 149°C),
with 1¼ inch MPT connection for upright mounting in
horizontal pipe (
Field-Mounted
).
DIFFERENTIAL PRESSURE SWITCH –
Alterna-
tive to an above mentioned fl ow switch. Pretempco
model DPS300AP40PF-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.
REMOTE DX COOLER –
A split system arrangement
with the cooler, leaving & return water sensors, liquid
line solenoid valves, fi lter driers, sightglasses & TXVs
shipped loose for fi eld connection to the air-cooled con-
densing section. The DX cooler and outdoor section will
have a nitrogen holding charge. Interconnecting rigid
piping, wiring and refrigerant are by others. Includes
YORK Service startup.
See Form 150.62-NM1.1 (200)
for other application information (this option includes
the Crankcase Heater option) (
Field-Mounted
).
CONDENSER AND CABINET OPTIONS
Condenser coil protection against corrosive environ-
ments is available by choosing any of the following
options.
For additional application recommendations,
refer to FORM 150.12-ES1 (
Factory-Mounted
).
PRE-COATED FIN CONDENSER COILS –
The
unit's coils are constructed with black epoxy coated
aluminum fi ns. This can provide corrosion resistance
comparable to copper-fi n coils in typical seashore loca-
tions. Either these or the post-coated coils (below) are
recommended for units being installed at the seashore
or where salt spray may hit the unit.
POST-COATED DIPPED CONDENSER COILS
–
The unit's coils are constructed with dipped-cured
condenser coils. This is another choice for seashore and
other corrosive applications (with the exception of strong
alkalis, oxidizers and wet bromine, chlorine and fl uorine
in concentrations greater than 100 ppm).
COPPER FIN CONDENSER COILS –
The unit's
coils are constructed with copper fi ns. (This is not rec-
ommended for units in areas where they may be exposed
to acid rain).
ENCLOSURE PANELS (UNIT) –
Tamperproof
Enclosure Panels prevent unauthorized access to units.
Enclosure Panels can provide an aesthetically pleas-
ing alternative to expensive fencing. Additionally, for
proper head pressure control, YORK recommends the
use of :
LOUVERED PANELS (Full Unit) –
Louvered panels
surround the front, back, and sides of the unit. They
prevent unauthorized access and visually screen unit
components. Unrestricted air fl ow is permitted through
generously sized louvered openings. This option is ap-
plicable for any outdoor design ambient temperature up
to 115°F (46°C) (
Factory-Mounted
).