Emerson PFH020A-L, User Manual

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Standard Features—1 & 1.5 Ton Systems
9 Liebert
®
Mini-Mate2
™
2.0 S
TANDARD
F
EATURES
—1 & 1.5 T
ON
S
YSTEMS
2.1 Self-Contained Systems
The self-contained system is designed for ceiling installation. The cabinet and chassis are constructed
of heavy gauge galvanized steel. The unit can be serviced using only one side, increasing its
versatility in mounting locations. Mounting brackets are factory-attached to the cabinet. Internal
cabinet insulation meets ASHRAE 62.1 requirements for Mold Growth, Humidity & Erosion, tested
per UL 181 and ASTM 1338 standards. Unit can be configured with canister humidifier and/or reheat
and various sensor options.
2.1.1 Air-Cooled Unit
The air-cooled unit includes the evaporator coil, condenser coil, compressor, all refrigerant piping,
R-407C unit charge, hot gas bypass, filter drier, high head pressure switch, two-speed direct-drive
blower assembly, microprocessor control with wall-mounted control box and factory-mounted
disconnect switch. MM2CF is a centrifugal blower box with a fan speed controlled motor that ships
separately and field-mounts on the cabinet to provide condenser head pressure control down to -20°F
(-29°C) ambient.
2.1.2 Water/Glycol-Cooled Unit
The water/glycol-cooled unit includes the evaporator coil, coaxial condenser, compressor, all internal
refrigerant and water/glycol piping, R-407C unit charge, hot gas bypass, filter drier, high head
pressure switch, two-speed direct-drive blower assembly, microprocessor control with wall-mounted
control box and factory-mounted disconnect switch.
2.1.3 Chilled Water Unit
The chilled water unit includes the chilled water coil, two-speed, direct-drive centrifugal blower,
two-way, slow-close solenoid, spring-return valve and factory-mounted disconnect switch. Design
pressure is 300psi (2068 kPa) with a 25psi (172 kPa) close-off differential.
2.2 Evaporator Section—Split Systems
The split-system evaporator is designed for ceiling installation. The cabinet and chassis are
constructed of heavy gauge galvanized steel. The unit can be serviced using only one side increasing
its versatility in mounting locations. Mounting brackets are factory-attached to the cabinet. Internal
cabinet insulation meets ASHRAE 62.1 requirements for Mold Growth, Humidity & Erosion, tested
per UL 181 and ASTM 1338 standards. The evaporator section includes the evaporator coil, R-407C
unit charge, filter drier, two-speed direct-drive blower assembly, microprocessor control with
wall-mounted control box and factory-mounted disconnect switch. Unit can be configured with
canister humidifier and/or reheat and various sensor options.
2.3 Condensing Unit Section—Split System
The outdoor prop fan condensing unit includes compressor, condenser coil, R-407C unit charge, prop
fan, liquid-line solenoid valve, high-pressure switch, Liebert Lee-Temp ™ head pressure control and
hot gas bypass. Condensing unit is designed for outdoor locations with operating ambients ranging
from -30°F to 95°F (-34°C to 35°C).
2.4 System Controls
System controls include a microprocessor control board mounted in the cooling unit and a
wall-mounted interface with a two-line, 16-character liquid crystal display. An eight-key, membrane
keypad for setpoint/program control, unit On/Off, fan speed and alarm silence is below the LCD
screen. It provides temperature setpoint and sensitivity adjustment, humidity setpoint and
sensitivity adjustment, digital display of temperature, humidity, setpoints, sensitivities, fan speed
and alarm conditions.