2.2.7
Condenser, Water-Cooled, Integral
Provide cleanable tube-in-tube condenser with [copper] [70/30
copper-nickel] coolant wetted surfaces and coolant regulating valve.
Base
condenser rating on coolant fouling factor of [0.0005] [0.001].
2.2.8
Condenser-Receiver, Water-Cooled, Integral
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NOTE: Normally 70/30 copper nickel performance is
superior to 90/10 copper nickel in brackish and salt
water. Where conditions are not detrimental to
90/10 copper nickel, incorporate same as an
alternative acceptable material. Use the higher
fouling factor for open systems.
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Provide cleanable shell and tube condenser-receiver with [copper] [70/30
copper-nickel] tubes and coolant regulating valve. Base condenser rating
on coolant fouling factor of [0.0005.] [0.001.]
2.2.9
Control Panels
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NOTE: Verify that reverse-phase, and phase
imbalance protection provisions are available in
sizes under 70 kW 20 tons. Check with manufacturers
before specifying other than across-the-line
starting.
**************************************************************************
Control panels and electrical components shall conform to NFPA 70,NEMA ICS 1,
NEMA ICS 2, NEMA ICS 3, NEMA ICS 4 and NEMA ICS 6, and mounted in a NEMA
ICS 6, Type 1 enclosure. Electrical controls shall include [[fused]
[unfused] disconnect;] control transformers with 50 percent excess
capacity; main and branch circuit overload protective devices compensated
for ambient temperatures as recommended by the manufacturer; reverse phase
protection where necessary to preclude damage; single-phase and
phase-imbalance protection; low voltage protection; manual reset on power
interruption or safety shutdown; [power factor correction capacitors;]
[status pilot lights;] compressor safety, operating and capacity controls;
[defrost controls;] [local and remote audible and visual alarms with
provisions to silence;] short cycling control with lock-out timer; time
delay for sequenced compressor starts; remote component interface; and
intercomponent wiring to terminal blocks with 10 spares. Provide stranded
copper wire of required ampacity and insulation at encountered
temperatures. Identify wires at terminal points.
2.2.10
Base Mounting
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NOTE: Where condensing units or compressors are
located on top of walk-in boxes, mount on spring
vibration isolators. Weight of inertia block shall
be an engineered solution accommodating site
conditions.
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Mount compressors and components on a rigid, fabricated steel [base,]
SECTION 15602N
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