Heatcraft Refrigeration Products HCS manual Standard Unit Features

	Standard Unit Features
Basic Ca
Basic Cabinet		Motor Mount
Consists of a fan section and a coil section with double wall drain		Heatcraft puts the motor inside the fan section cabinet. It is
pan. The housing panels are die formed from mill galvanized steel		mounted on a heavy gauge steel slide rail base. There are several
and insulated with 1" - 3/4 pound density mat faced fiberglass		advantages with internal motor location. It eliminates the need for
insulation. All fan sections have hinged and latched access doors.		a bulky belt guard. Another advantage is that Heatcraft balances
Unit below has fan and coil section.		the factory mounted motor and drive components, which can
		eliminate additional balancing at start-up.

Fans

All units have single, double width, double inlet fan
wheels for quiet performance and low energy consumption.		Coil Section
Single wheels eliminate the problem of unequal loading which is		Coil sections cover a wide range of heating and cooling
characteristic of units with multiple wheels. Also, the expense of a
“pants” type duct connection is avoided. Sizes 03 through 41 units		requirements. Side, top and bottom panels are 16 gauge mill
have forward curved and size 50 through size 75 units have airfoil		galvanized steel. All coil sections accommodate either small or
fan as standard.		large face area coils.
		The HCS coil section will hold 15 1/2" of coils and spacers. The
		HCS section covers most applications. Use the HCL coil section
		if the coil or access space is more than 15 1/2". (See page 38 for
		maximum per model.)
		Cooling coil sections have a drain pan with double wall
		construction. Insulation is sandwiched between the outer panel
		and the inner drain pan. The pans are heavy gauge mill galvanized
		steel. Heatcraft welds the corners of the drain pans and puts drain
		connections on both sides of the coil section for field convenience.
Forward	Air Foil	The coils sit in an upright position inside the coil section. The
		air flows horizontally through the coils. Larger models (sizes 50
Curved Fans	Fans	through 75) have cooling coils stacked two high.These larger
		models come with an intermediate drain pan, so that condensate
Bearings		from the upper coil does not flow over the lower coil.
Unit sizes 03 through 12 have lifetime lubricated fan bearings as
standard. Unit sizes 03 through 12 with optional medium pressure		Coils come in either small or large sizes (pages 42-43). A large
fan have pillow block bearings rigidly supported on a heavy steel		face area coil fills the total face area of the coil section. The
frame. Unit sizes 14 through 75 have pillow block bearing rigidly		coil section’s total air volume passes through the large coil. A
supported on a heavy steel	frame as standard. The bearings are	small coil is shorter in height and does not fill the total face
self aligning and are selected for an average service life in excess		height of the coil section. Air may bypass above the coil through
of 200,000 hours. There are extended lube lines and grease fittings		balance dampers or internal face and bypass dampers. With either
on the drive side of all units that have pillow block bearings. The		combination, it is possible to adjust and control the amount of air
bearings on these models can be lubricated without opening the		passing through the small size coil.
blower section access door. Maximum operating temperature is
140°F.
		Chilled water and direct expansion coil face velocities
		over 550 FPM should be avoided--WATER CARRYOVER.
Fan Shaft
The fan shaft is solid polished steel, and keyed for both fan and		If desired, a blank off plate above the small coil can force total coil
drive. It is designed so that critical speed is at least 1.25 times the		section air volume through the small coil.
maximum operating speed.

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