Central Water Chiller | Outdoor Air-Cooled | 20 Ton

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Water Chiller | Outdoor Installation | Dual Zone

Model OACS-20D-MZC-2P shown. Image shown is typical. Actual unit appearance will vary according specifications and options.

Central Water Chiller | Outdoor Air-Cooled | 20 Ton

OACS-20D-MZC-2P

These air-cooled central chillers use mechanical refrigeration to cool recirculated fluid that support industrial process cooling applications.
20°F to 70°F fluid temperature range.
Air-cooled water chillers use ambient air to dissipate process heat and efficiently runs in air temperature between -20°F to 95°F.
These systems are designed for outdoor installation in most types of climates. The air-cooled condenser, chiller zones, reservoir and pumping system are delivered as a complete package.

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20 TonsCooling Capacity

2# of Zones

3 HPPump

48 GPMProcess Flow

Specifications
Features
Options
Control Instrument
Support Documents

Specifications

Refrigerant Zones

Quantity: 2

Capacity

Tons: 19.6
kW: 68.9

Compressor

Type: Digital Scroll

Refrigerant

Type: R-454B

Air-Cooled Condenser

Quantity of Fans: 2

Evaporator

Type: Braze Plate

Process Pump

HP: 3
GPM: 48
PSI: 48

Evaporator Pump

HP: 2
GPM: 48

Connection Sizes

Type: NPT
Size: 2"

Reservoir Capacity

Capacity: 150 Gallons
Construction: Polyethylene

Full Load Amperage

460/3/60: 59.2

Dimensions

Height: 91"
Width: 76"
Depth: 95"

Specification Notes:

Since product innovation and improvement is our constant goal, all features and specifications are subject to change without notice or liability. Selection of certain optional features may change listed specifications.
Cooling capacity: Rated tons at 12,000 BTU/hr/ton @ 50°F LWT Operating at temperatures below 50° will reduce chiller capacity. The minimum recommended operating temperature or outdoor ambient temperature when no glycol is used is 48°F.
Ambient conditions for condenser: Loss of capacity and/or difficulty operating may occur at higher ambient temperatures. The minimum recommended ambient temperature is -20°F.
Dimensions are approximate and should be confirmed with the factory prior to construction planning.

Features

Refrigerant Circuit

R-454B refrigerant
Scroll compressor
Microprocessor controlled 50% hot gas by-pass capacity control system
Suction service valve
Discharge service valve
Brazed plate evaporator
Stainless steel plates
Copper brazing material
Refrigerant sight glass with moisture indicator
Filter-drier
Thermostatic expansion valve
Liquid line solenoid valve

Condenser

Air-Cooled
Condenser shipped separately and requires field installation.
Remote, located outdoors
Heavy gauge galvanized steel cabinet on heavy duty legs
Enhanced copper tubing
with aluminum fins
with aluminum fins
Energy efficient motors
Direct drive fans
with quiet “swept wing” blades
with quiet “swept wing” blades
Non-fused power disconnect

Electrical

UL listed electrical components
UL508A enclosed electrical cabinet
Branch circuit protection of components
Fused transformer
Process pump motor starter
Compressor motor starter
Power entry terminal block
Electrical circuit has a standard SSCR rating of 5 kA

Coolant Circuit

Process pump
Large capacity
Discharge service valve
Suction service valve
Evaporator pump
Discharge service valve
Discharge suction valve

Reservoir

Seemless rotationally molded and non-rusting polyethylene
Full 3/8″ dense foam insulation
Drain valve
Overflow port
Automatic water level control
Hot / cold section baffle
Spare pump port

Pressure Gauges

Refrigerant (per zone)
Refrigerant head
Refrigerant low
Coolant
To Process

System Limit Devices

Refrigerant (per zone)
High refrigerant pressure
Low refrigerant pressure
Coolant
Pump motor overload relay
Coolant freezestat
Evaporator flow

Warranty

1 year covering parts and labor
Warranty Document
Free preventative maintenance check in the 2nd year.

Options

Refrigerant Circuit

Condensers utilizing all EC fan motors for higher energy efficiency
Oversized condensers for higher efficiency and full rated performance in higher ambient conditions

Electrical

Main power disconnect switch

Control Instrument

Modbus TCP/IP RJ45
Remote control instrument display

Coolant Circuit

Automatic Low Flow Bypass
Automatic low flow bypass valve
Overhead piping kit
Supply & return isolation valves
Drain-back prevention system for use with overhead piping systems
Standby Pump : 3 HP : TEFC Motor
Higher flow or pressure process pumps
Choice of reservoir construction; Rotationally molded polyethylene or welded stainless steel

Frame Construction

External Filters

Control Instrument

MZC Series Control Instrument

Microprocessor based multizone controller
Independent intelligent zone boards
Compressors are staged individually
Continuous To Process temperature display
Continuous Setpoint temperature display
Selectable from process temperature display
Large temperature display windows
°F or °C temperature display
Refrigerant circuit indicator lights for
– Probe
– Low Flow
– High Pressure
– Low Pressure
– Compressor
– Freezestat
– Capacity Control
Water circuit indicator lights for
– Temperature Deviations
– Low Pressure
– Tank Level
– Probe, Phase
Selectable lead – lag mode
Soft Key Operators
SPI communications
Audible and visual alarm