Above
Air
™
MissionCritical
™
A/C’s
AboveAir
Technologies
(MC22-L12)
13
Guide Specifications
Guide Specifications -
MC
-
2x2
™
Mission
Critical
(1-3 Tons)
2.1.5.2
Down-Flow Air Pattern
The system shall be configured for down-
flow evaporator air pattern with top free
or ducted return and bottom discharge
into raised floor.
(Refer to Floor Stand
Options.)
2.1.6 Air Filtration
The filter(s) shall be ___ inch thick
pleated and rated for 30% dust spot ef
-
ficiency (based on ASHRAE 52.1). The
filter(s) shall be serviceable through front
of the system.
2.1.7 Piping Connection Location
2.1.7.1 Top Piping Connections
2.1.7.2 Bottom Piping Connec
-
tions
2.2 Direct Expansion Systems
2.2.1 DX - Evaporator Coil
The DX evaporator coil shall be con
-
structed of copper tubes and aluminum
fins. The system shall be designed for
a draw-through air pattern for maximum
heat transfer. Coil end-plates shall be
hot dipped galvanized. The evapora
-
tor coil shall be mounted in an insulated
stainless steel condensate drain pan.
2.2.2 Scroll Compressor
Each compressor shall be the high ef
-
ficiency, low sound Scroll type mounted
on vibration isolators and located in a
separate compartment out of the evapo
-
rator air stream to facilitate servicing
while equipment is operating. Each com
-
pressor shall be complete with reversible
positive oil pump, charging and service
ports, internal spring isolation, and dis
-
charge gas vibration eliminator.
2.2.3 DX - Refrigeration Circuit
Each refrigeration circuit shall be pre-
piped with type “L” refrigerant copper
tubing. The refrigeration system shall
include but not be limited to: expansion
valve with external equalizer and rapid
bleed-through capacity. Features shall
include filter dryer, sight glass, pressure
fittings and high pressure/low pressure
safety cutouts.
2.3
Standard Features /
Individual Systems
2.3.1 DX - Air Cooled Systems
2.3.1.1 DX - Air Cooled Split
(Split Evap & Outdoor
Remote Condenser)
VCE-( ) & XP1-( )
The system shall be a split configura
-
tion with compact 24” x 24” maximum
foot-print indoor vertical floor mounted
dx evaporator precision air conditioner
with outdoor dx air cooled propeller fan
remote condenser. The compressor
shall be located in the indoor evaporator
section. The condenser shall be sized
for full heat of rejection at 95°F ambient
and be capable of operation to ___ °F
low ambient air temperature.
The system shall be refrigerant charged
and run tested at the factory prior to ship
-
ment. The evaporator and condenser
sections shall ship separately with a dry-
nitrogen charge ready for field refrigerant
charging.
(
Note-1:
See 2.4.1 pg 12 Low Amb. Options.)
2.3.1.2 DX - Air Cooled Split
(Air Handling & Outdoor
Remote Condensing Units)
VCH-( ) & XPU-( )
The system shall be a split configura
-
tion with compact 24” x 24” maximum
foot-print indoor vertical floor mounted
precision dx air handling unit with out
-
door dx air cooled propeller fan remote
condensing unit. The compressor shall
be located in the condensing unit. The
condensing unit shall be sized for full
heat of rejection at 95°F ambient and be
capable of operation to ___ °F low ambi
-
ent air temperature.
The system shall be refrigerant charged
and run tested at the factory prior to
shipment. The evaporator and condens
-
ing unit sections shall ship separately
with a dry-nitrogen charge ready for field
refrigerant charging.
(
Note-1:
See 2.4.1 pg 12 Low Amb. Options.)
2.3.1.3 DX - Air Cooled Split
(Air Handler & Indoor
Remote Condensing Unit)
VCH-( ) & CCU or XCU-( )
The system shall be a split configura
-
tion with compact 24” x 24” maximum
foot-print indoor vertical floor mounted
precision dx air handling unit with indoor
dx - air cooled centrifugal blower remote
condensing unit. The compressor shall
be located in the condensing unit. The
condensing unit shall be sized for full
heat of rejection at 95°F ambient and be
capable of operation to ___ °F low ambi
-
ent air temperature.
The system shall factory tested prior to
shipment. The air handling and con
-
densing unit sections shall ship sepa
-
rately from the factory with a dry-nitrogen
holding charge for field sweat (copper)
connection and refrigerant charging.
(
Note-1:
See 2.4.1 pg 12 Low Amb. Options.)
2.3.2 DX - Water Cooled
(Self-Contained Systems)
Models: VCW-( )
The system shall be a self-contained,
compact 24” x 24” maximum foot-print
indoor vertical floor mounted dx water
cooled precision air conditioner. The
system shall include a water cooled tube-
in-tube coaxial condenser and factory
installed head pressure controlling 2-way
water regulating valve rated for 150 psi
w.w.p. The water cooled condenser shall
be designed to provide the total required
system heat of rejection at 85°F enter
-
ing water temperature and 95°F leaving
water temperature. Source water shall
