Bryant 581A/B Application Data, Concentric Duct Details, Condenser Coil Protection Applications

APPLICATION DATA (cont)

CONCENTRIC DUCT DISTRIBUTION

CONCENTRIC DUCT DETAILS

1'-10 11/16''	6'-2 3/8'' MAX.
MAX.	5'-9 3/16'' MAX.

5 3/16''

1'-0 3/16''

4'-6 13/16'' 1'-7 15/16''

1'-0 3/16''

24'' MIN.

B

B

A

a48-7482

NOTE: Do not drill in this area, damage to basepan may result in water leak.

A

a50-530

BAFFLE

Shaded area indicates block-off panels.

NOTE: Dimensions A, A′ and B, B′ are obtained from field-supplied ceiling diffuser.

Concentric Duct Details

c.E-COATED ALUMINUM FIN coils undergo a precisely controlled scientific process that bonds an impermeable epoxy coating to the specially prepared fin coil surface. E-Coating produces a smooth, consistent coating that is less brittle, more resilient and more durable than previ- ous postcoating processes. E-Coated aluminum-fin coils offer economical protection and improved coil life in many contaminated environments.

d.E-COATEDCOPPER-FIN COILS provide maximum pro- tection in virtually all environments, this option combines the continuous, impenetrable barrier of the E-Coating process with the natural resistance of an all-copper con- struction. E-Coated copper-fin coil assemblies ensure long life, even in environments that combine harsh coastal conditions with industrial contamination.

16.ECONOMI$ER IV — The EconoMi$er IV factory-installed economizer package includes a gear-driven damper sys- tem that modulates the return air and outdoor air supply to the rooftop unit in order to take advantage of “free cooling” with outdoor air when conditions are suitable. The system utilizes industry proven technology available for integrating the use of outdoor air for cooling with mechanical cooling for 3 through 25-ton rooftop units. The intuitive EconoMi$er IV microprocessor-based controller optimizes

and enhances rooftop operation through reduced energy consumption, optimal zone comfort, and efficient equip- ment cycling. This is accomplished by operating the com- pressors when the outdoor air temperature is too warm, integrating the compressors with outdoor air when free cooling is available, and locking out the compressor when outdoor air temperature is too cold. The detailed sequence of operation is described in the Controls section with a brief description of selected application items here.

a.THERMOSTAT INTERFACE — The EconoMi$er IV con- trol was designed to work with conventional thermostats that have Y1 (cooling stage 1), Y2 (cooling stage 2), W1 (heat stage 1), W2 (heat stage 2), and G (fan). In addi- tion, the EconoMi$er IV will support an occupied/ unoccupied switch (typically integrated into the thermo- stat or Thermidistat™ device). When the switch is closed, it provides a 24-vac signal to the unit for occu- pied mode, and provides no signal to indicate unoccu- pied mode. The EconoMi$er IV control can be configured to allow different minimum economizer damper positions and to allow the use of mechanical cooling in the occupied mode.

CONDENSER COIL PROTECTION APPLICATIONS

	DESCRIPTION					ENVIRONMENT
	(Dura-Shield Option)	Standard, Non-Corrosive			Mild Coastal		Severe Coastal	Industrial	Combined Coastal
									and Industrial
Standard, Al/Cu			X
Pre-Coated Al/Cu					X
Cu/Cu					X
E-Coated Al/Cu								X	X
E-Coated Cu/Cu							X
			LEGEND
Al/Cu	— Aluminum Fin with Copper Tube Coil		E-Coated	— Extremely Flexible and Durable Epoxy Coating Uniformly
Cu/Cu	— Copper Fin with Copper Tube Coil				Applied to the Coil Surfaces
Dura-Shield	— Family of Coil Protection Options		Pre-Coated	— Epoxy Coating Applied to Fin Stock Material

264