CyberChiller Series Installation, Operation & Maintenance Manual

2.5Piping Connections

2.5.1Process Supply Fluid Lines

Coolant fluid supply and return lines are connected from the equipment being cooled to the CyberChiller via copper sweat fittings provided in the pump section.

2.5.2Refrigerant

2.5.2.1Split Air Cooled Systems

Split air-cooled systems with a remote condenser will require field refrigeration piping. (See Figure 3.) All split systems are shipped with a dry nitrogen charge of 50 psig.

Split systems coupled with a remote condensing unit will require a copper discharge and a copper liquid line.

All refrigeration piping should be installed with high temperature soldered joints. Use standard refrigeration practices for piping supports, leak testing, dehydration and charging of the refrigeration circuits. The refrigeration piping should be isolated from the building by the use of vibration isolating supports. To prevent tube damage when sealing openings in walls and to reduce vibration transmission, use a soft flexible material to pack around the tubes.

Clear all pipe connections of debris and prepare the connections for soldering. Use only "L" or "K" grade refrigerant copper piping. Be careful not to allow solder/piping debris to get inside refrigerant lines. Silver solder containing a minimum of 15% silver is recommended. Dry nitrogen should be flowing through the tubing while soldering at a rate of not less than 1-2 CFM (.03 - .06 M3/minute).

Refrigerant lines for split systems must be sized according to the piping distance between the evaporator and the condenser. Each valve, fitting and bend in the refrigerant line must be considered in this calcula- tion. Refer to the following charts for standard equivalent lengths, in feet, of straight pipe.

Oil traps must be included in the discharge line every 20 feet in the vertical risers and the refrigerant lines must be sloped ¼ inch for every 10 feet in the horizontal lines to ensure proper oil return to the compressor. An inverted trap is required on the discharge line of the remote condenser to help prevent oil and liquid from flooding back to the compressor.

 

 

 

PRESSURE

 

 

 

 

 

 

 

 

RELIEF VALVE

 

 

 

 

 

INTERCONNECTING

(OPTIONAL)

 

 

 

 

 

SEE NOTE 2

 

 

 

 

 

FIELD PIPING BY OTHERS

 

 

 

 

 

 

 

 

 

 

 

SIGHT GLASS

LIQUID LINE

EXPANSION

 

 

 

 

 

DRIER/STRAINER

 

SOLENOID VALVE

VALVE

 

 

 

 

 

 

 

 

 

 

 

SERVICE

 

 

 

 

 

 

 

RECEIVER

PORT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HOT GAS

 

ELECTRONIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HOT GAS BYPASS

 

 

 

 

 

 

SOLENOID VALVE

 

 

 

 

 

 

 

VALVE

 

 

 

 

 

 

 

 

LINE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCHRADER CHECK

ROTOLOCK

 

 

EQUALIZER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVE

 

 

 

CONDENSER

 

 

 

 

 

 

FAN SPEED CS

 

 

 

 

ROTOLOCK

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

INTERCONNECTING

 

HIGH PRESSURE

HP

 

 

 

FIELD PIPING BY OTHERS

 

LIMIT SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

SERVICE PORT

 

OW PRESSURE

 

 

 

 

 

 

 

IMIT SWITCH

NOTES:

SERVICE PORT

1) LOCATE AUTOMATIC AIR VENT AT HIGHEST POINT OF SYSTEM.

2) PRESSURE RELIEF VALVE MUST BE PIPED TO EXIT THE CABINET.

INLET

EVAP

OUTLET

Figure 3- Typical Piping Air Cooled System

2-3

 

 

 

(©October, 2006)