bulb located on top of the suction line when the suction line is less than
54 mm (2-1/8 inches) 2-1/8 inches in diameter and at the 4 o'clock or 8
o'clock position on lines larger than 54 mm (2-1/8 inches).2-1/8 inches.
The bulb shall be securely fastened with two clamps. The bulb shall be
insulated. The bulb shall installed in a horizontal portion of the suction
line, if possible, with the pigtail on the bottom. If the bulb must be
installed in a vertical line, the bulb tubing shall be facing up.
3.1.4.3
Valve Identification
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NOTE: Delete last two sentences when identification
tags are not considered necessary in small projects.
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Each system valve, including those which are part of a factory assembly,
shall be tagged. Tags shall be in alphanumeric sequence, progressing in
direction of fluid flow. Tags shall be embossed, engraved, or stamped
plastic or nonferrous metal of various shapes, sized approximately 34 mm
(1-3/8 inch) 1-3/8 inch diameter, or equivalent dimension, substantially
attached to a component or immediately adjacent thereto. Tags shall be
attached with nonferrous, heavy duty, bead or link chain, 14 gauge 14 gauge
annealed wire, nylon cable bands or as approved. Tag numbers shall be
referenced in Operation and Maintenance Manuals and system diagrams.
3.1.5
Vibration Dampers
Vibration damper shall be provided in the suction and discharge lines on
spring mounted compressors. Vibration dampers shall be installed parallel
with the shaft of the compressor and shall be anchored firmly at the
upstream end on the suction line and the downstream end in the discharge
line.
3.1.6
Strainers
Strainers shall be provided immediately ahead of solenoid valves and
expansion devices. Strainers may be an integral part of an expansion valve.
3.1.7
Filter Dryer
A liquid line filter dryer shall be provided on each refrigerant circuit
located such that all liquid refrigerant passes through a filter dryer.
Dryers shall be sized in accordance with the manufacturer's recommendations
for the system in which it is installed. Dryers shall be installed such
that it can be isolated from the system, the isolated portion of the system
evacuated, and the filter dryer replaced. Dryers shall be installed in the
horizontal position except replaceable core filter dryers may be installed
in the vertical position with the access flange on the bottom.
3.1.8
Sight Glass
A moisture indicating sight glass shall be installed in all refrigerant
circuits down stream of all filter dryers and where indicated. Site
glasses shall be full line size.
3.1.9
Discharge Line Oil Separator
Discharge line oil separator shall be provided in the discharge line from
each compressor. Oil return line shall be connected to the compressor as
SECTION 15182
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