Instruction Manual

ClimaCool Engineering Guide Specifications
35
This requires no removal of existing refrigerant oil, only a
refrigerant change on site.
The dual refrigerant circuits shall be pre-charged with R22 as
standard, or with optional R407C, and factory run tested. Re-
fer to the project chiller equipment schedule for the selected
refrigerant. If refrigerant R22 is specifi ed, the chiller must
have the ability to accept R407C at a later date in the fi eld.
Each circuit shall consist of a factory tested scroll compres-
sor, with high pressure switch, low pressure switch, pressure
relief valve, discharge, suction, and liquid isolation valves,
a liquid line drier, moisture indicator, externally equalized
thermal valve (suitable for R22 and R407C), plus gauge
port connections.
Electrical
Each module is to be manufactured with it’s own control
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compressor power on, and alarm indicators are to be mounted
in full view on the front of each module. All individual power
panels shall be equipped with a lockable door latch mech-
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The power distribution system for each module shall contain:
• Main power distribution terminal
• Compressor motor contactors
• Motor overload protection per compressor
• Individual compressor motor fusing or breakers
Each individual module shall be equipped with a local
manual “ON” / “OFF” compressor switch to allow service or
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the entire chiller. The use of individual power supply to each
module shall allow the unit to produce chilled water while
any one module is shut down for repair or service.
Controls
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microprocessor controller. The controller must be pro-
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The controller must be capable of communicating and be-
coming part of any facility management system with optional
programming. The controller shall be capable of remote
monitoring via an additional modem connection.
Control functions:
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• Compressor sequencing
• Compressor anti-short cycle
• Low temperature freeze protection
• High pressure control switch
• Low pressure control switch
• Alarms for high/low water temperature
Run Test
Each chiller module shall be pre-charged with refrigerant at
the factory. Each system shall be given a documented factory
run test with water circulated through each module under
load conditions.
Installation
Per the project drawings, the installing contractor shall con-
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insulate connection points on the chilled water side fl ange
connections in the fi eld. Two 4” to 6” rails (provided by
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breaker panel with individual circuit breakers is required to
feed each module. Alternatively, separate fused disconnect
switches can be provided (by others) to feed each module.
Operation and Maintenance - Redundancy
Each modular chiller shall be designed so that any major
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having to shut down the entire system. Every module shall
be equipped with (4) factory-installed isolation valves, (2)
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module shall permit any module within a bank of chillers
to be shut down for service, while the remaining modules
continue to operate.
Codes and Standards Reference
a. ARI 550/590-1998 - Standard for Water Chilling
Packages using the Vapor Compression Cycle.
b. ANSI/ASHRAE 90.1 - Energy Effi cient Design of
New Buildings.
c. ANSI/ASHRAE STANDARD 15-1992 - Safety
Code for Mechanical Refrigeration.
d. ANSI/UL 1995 - Central Cooling Air Conditioners.
e. UL 984 - Safety Standards for Hermetic Motor
Compressors.
f. ARI STANDARD 575-87 - Method of Measuring
Machinery Sound Within Equipment Rooms.
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