York YLUA0248 Series Installation Operation & Maintenance page 19

FORM 150.73-NM2
ISSUE DATE: 09/07/2020
Compressor and Piping Options
CHICAGO CODE RELIEF VALVES – Unit will be
provided with relief valves to meet Chicago code re-
quirements. (Factory mounted).
HOT GAS BY-PASS – Permits continuous, stable op-
eration 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 artificial load. Hot gas by-pass is available in-
stalled on refrigerant system #1 or on both systems of
two circuited units. (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 com pliance with ASHRAE 15.
(Factory 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
air-cooled condenser coils are constructed of black ep-
oxy-coated aluminum fins. This can provide corrosion
resistance comparable to copper-fin 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 is built with dipped and cured condenser coils.
This is another choice for seashore and other corrosive
appli cations (with the exception of strong alkalis, oxi-
dizers and wet bromine, chlorine and fluorine in con-
centrations greater than 100 ppm).
COPPER-FIN CONDENSER COILS – The unit
constructed with condenser coils which have copper
fins. (This is not recommended for units in areas where
they may be exposed to acid rain).
ENCLOSURE PANELS (UNIT) – Tamperproof En-
closure 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 Condenser Louvered Panels for winter applica-
tions where wind gusts may exceed five miles per hour.
JOHNSON CONTROLS
SECTION 2 – PRODUCT DESCRIPTION
The following types of enclosure panels are available:
WIRE PANELS (FULL UNIT) – Consists of welded-
wire mesh guards mounted on the exterior of the unit.
Prevents unauthorized access, yet provides free air
flow. (Factory mounted).
WIRE/LOUVERED PANELS – Consists of welded-
wire-mesh panels on the bottom part of unit and lou-
vered panels on the condenser section of the unit. (Fac-
tory mounted).
LOUVERED PANELS
ONLY) – Louvered panels are mounted on the sides
and ends of the condenser coils for protection. (Factory
mounted).
LOUVERED PANELS (FULL UNIT) – Louvered
panels sur round the front, back, and sides of the unit.
These prevent unauthorized access and visually screen
unit components. Unrestricted air flow is permitted
through generously sized louvered openings. This op-
tion is applicable for any outdoor design ambient tem-
perature up to 115°F (46°C). (Factory mounted).
SOUND ATTENUATION – One or both of the fol-
lowing sound attenuation options are recommended for
residential or other similar sound sensitive locations:
COMPRESSOR ACOUSTIC SOUND BLANKET –
Each compressor is individually enclosed by an acous-
tic sound blanket. The sound blankets are made with
one layer of acoustical absorbent textile fiber of 5/8"
(15mm) thickness; one layer of anti-vibrating heavy
material thickness of 1/8" (3mm). Both are closed by
two sheets of welded PVC, reinforced for temperature
and UV resistance. (Factory mounted).
ULTRA QUIET FANS – Lower RPM, 8-pole fan mo-
tors are used with steeper-pitch fans. (Factory mount-
ed).
VIBRATION ISOLATORS – Level adjusting, spring
type 1" (25.4mm) or seismic deflection or neoprene
pad isolators for mounting under unit base rails. (Fac-
tory mounted).
(CONDENSER COIL
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