[multiple stages][ or ][Silicon Controlled Rectifier (SCR).] Provide UL or
ETL listed safety switches to protect system from overheating.]
2.1.6
Humidifier
Humidifier section shall include liquid-level control, emergency overflow
and automatic water supply system factory pre-piped for final connection.
Provide stainless steel evaporator pan with water high level and low level
alarms. Arrange system to be cleanable and serviceable.
[Provide infrared type humidifier, including high intensity quartz lamps
mounted above and out of water supply.]
[Provide low-watts density electric heater immersion type humidifier.
Provide entire assembly and removable pan of stainless steel construction.
Protect elements with high temperature limit cutout.]
[Provide steam generator type humidifier. Provide steam generator
humidifier cutout. Controls shall include steam generation, and flush
cycle. Furnish two extra cannisters.]
2.1.7
Refrigeration System
Provide compressor[s] complete with vibration isolation, suction and
discharge service valves, high and low pressure safety switches, and
built-in overload protection.
Provide refrigeration circuits including
hot gas mufflers, liquid-line filter-drier, refrigerant sight glass and
moisture indicator, externally equalized expansion valve, and liquid-line
solenoid valve factory connected with refrigeration copper tubing.
[Crankcase heaters are required.] [Provide hot gas bypass.]
[2.1.7.1
Compressors
**************************************************************************
NOTE: The purpose of the paragraph below is to
prevent the acquisition of a refrigerant compressor
design that is inferior from an energy efficiency or
control standpoint. Delete this paragraph if there
is no probability of acquisition of high energy
users or inferior contols at a given capacity.
However, if such an acquisition is probable, use the
selections below to prohibit the acquisition of
inferior designs.
**************************************************************************
Provide [single] or [dual], [hermetic] or [semi-hermetic] or [scroll]
compressors. [If dual compressors are provided, the refrigeration system
shall be equipped with two independent refrigeration circuits.] [Dual
semi-hermetic compressors shall be provided complete with unloading system.]
][2.1.7.2
Refrigerant Tubing
Field-installed refrigerant tubing for split systems shall be ASTM B 280,
cleaned, dehydrated, and sealed. Further, provide ASME B16.22 solder joint
refrigerant fittings and adapters with silver brazing alloy solder and
silver brazing alloy flux. During brazing operations bleed a small amount
of dry oil-free nitrogen continuously through the refrigerant tubing. If
required for connections to equipment, provide ASME B16.26 flared fittings.
SECTION 15702N
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