Indoor Air Cooled Chiller Packages | Berg Chilling Systems

Indoor Air Cooled Chiller Packages

Berg industrial indoor air cooled refrigeration units have a choice of semi-hermetic refrigeration compressors, scroll refrigeration compressors or screw refrigeration compressors with a double pump tank mounted with the chiller module, plus the advantage of being able to reclaim waste heat. All Berg industrial refrigeration units are fully tested under actual load conditions before being shipped.

Features and Benefits
Technical Information
Layout Pictorial

Indoor Air Cooled Chiller Packages

The Berg air cooled package chillers are recommended for industrial applications with clean air, when heat reclaim is beneficial, and wherein an integrated pumping system is required. These units are part of Berg’s complete line of packaged industrial chillers. They are self-contained and include both a liquid chiller and a double pump tank system for a complete industrial cooling solution. This chiller comes pre-piped and pre-wired, and requires a minimum of installation effort and only occupies a small amount of floor space.

Highlights

Compressor (HP) 20 or more
Cooling Capacity (Refrigeration tons) 15 or more
Heating (BTU/hr) 270k – 846k

Compressor Options Semi Hermetic Reciprocating Compressor (AS)

Suction gas cooled motor
Suction and discharge stop valve
Step capacity control
Crankcase heater with current sensing relay
Suction and discharge pressure transmitter
High pressure switch
Hot gas capacity control

Open Type Compressor (AO)

Suction and discharge stop valve
Step capacity control
Drive coupling and C-flange adaptor/coupling guard
Suction and discharge pressure transmitter
Discharge high temperature cut-out
High pressure switch
Oil differential pressure switch
Crankcase heater with current relay
TEFC motor certified for hazardous environments

Scroll Compressor (AZ)

Suction gas cooled motor
Suction and discharge stop valve
High pressure switch
Crankcase heater with current sensing relay
Hot gas capacity control

Screw Compressor (AQ)

Suction gas cooled motor
Suction and discharge stop valve
Slide valve capacity control
Integral oil separator with heater and current sensing relay
Crankcase heater with current sensing relay
Suction and discharge pressure transmitter
High pressure switch
Hot gas capacity control

Chiller Vessel

High efficiency shell and tube construction
Coded vessel steel shell on water side
Copper tube with inner fin on refrigerant side

Stainless Steel Tank

Baffled Stainless Steel type 304 Reservoir, 11 gauge
Reinforcement bands
Removable stainless steel cover
Overflow connection
Bottom drain connection with shut‑off valve
Automatic float operated water make‑up valve
Thermometer with well
Spare well opening
Closed cell flexible insulation nominal ½” thick applied to bottom and sides of tank

Evaporator

High efficiency copper brazed stainless steel plate construction
Designed and constructed in accordance with ASME code
High efficiency shell and tube construction
Carbon steel shell (water side)
Copper tube with inner fin (refrigerant side)
Vessel designed and constructed in accordance with ASME code
Other materials of are construction available upon request

Centrifugal Pump Assembly

Evaporator pumps circulate water from the hot well to the chiller and back to the cold well. This provides a constant flow and pressure for stable operation, maximum efficiency, and safety.
Process pumps circulate water from the cold well to the process and back to hot well. This flow may fluctuate without affecting the flow through the chiller.
Optional combined standby pump, complete with valved header assembly is capable of acting as either the chiller or process pump if necessary to prevent any unnecessary shut-downs due to an operating pump fault.

Pump assembly includes:

Close coupled TEFC motor
Non-overloading impeller
Cast iron volute
Brass shaft sleeve
Mechanical seal
Suction shut‑off valve
Discharge flow/shut‑off valve
Discharge check valve
Discharge pressure gauge

Reservoir Mixing Tank and Frame

Frame manufactured from heavy gauge structured steel tube with welded construction.
Tank models manufactured from heavy gauge stainless steel.
Tank cover manufactured from stainless steel and supplied in sections for ease of removal and access (covers are optional).
All tanks have baffled compartments if required.
Make-up float valve.
Tanks are structurally supported around top and sides as required.

Air Cooled Outdoor or Indoor Remote Condenser or Blower

Heavy construction while maintaining maximum heat transfer
Seamless copper tubing
Aluminum fins
Permanent metal-to-metal contact
Dynamically balanced centrifugal blowers
Blowers are belt-driven by an open, drip-proof motor

Electrical

460 / 575 / 230 / 380 Volts | 60 / 50 Hz
120 / 240 Volt single phase control voltage
Microprocessor controller
Operating and fail lights
UL or CSA approved components

Central Control Electrical Panel

A custom electrical control panel allows one point hook up and may include:

HMI (Human Interface Device) touchscreens
PLC (Programmable Logic Control)
SCADA (Supervisory Control And Data Acquisition) Communication Systems
24/7 alarm reporting to beepers or cell phones

All pump starters, fuses, disconnect, control voltage transformer, run and fail lights, are housed in a common NEMA rated panel.

Safety Controls

Tested under load conditions prior to shipment All safety controls are factory set and checked

- Freeze-up controls
- High and low refrigerant pressure controls
- Compressor motor overload protection
- Oil pressure safety control
- Refrigerant pressure relief valve