APC IN ROW RD ACRD101 Service Manual download pdf (Page 52)

InRow RD Technical Data Manual46

F. Cooling Coil And Condensate Pan

1. ACRD100 and ACRD200 series:

a. The cooling coil shall use corrugated aluminum fin and copper tube coils. The coil header

is equipped with a drip plate in the bottom to capture and direct the condensation

accumulating on the suction header tube to the drain pan.

2. ACRD500 series:

a. The cooling coil shall use raised lance type corrugated aluminum fin and 12.7-mm (1/2-in)

OD copper tube coils. Fin shall be a minimum of 0.0055 in thick. Tube wall shall be a

minimum of 0.016 in thick. Coil end supports shall be a minimum 18 gauge G90

galvanized steel. The coil shall be rated for a maximum pressure of 3447.3 kPa (500 psig)

or higher, and the coils are certified in accordance with UL207. The coil header is

equipped with a drip plate in the bottom to capture and direct the condensation

accumulating on the suction header tube to the drain pan.

G. Compressor

1. SCROLL COMPRESSOR (ACRD100 series and ACRD200 series only)

a. The high EER (up to 20.0) and few moving parts of scroll compressors shall provide

efficient and reliable operation. Scroll technology has unparalleled ability to withstand

liquid refrigerant ‘slugging’ which is a major cause of compressor failure.

2. VARIABLE SPEED / VFD ASSEMBLY (ACRD500 series only)

a. Compressor: The unit shall be configured with a variable speed reciprocating hermetic

compressor using a matched VFD. As a result, the compressor speed can be varied

through a range between 30 and 85 Hz to accommodate varying load conditions. VFD

firmware is written to include oil return protection in cases where pipe velocities may drop

to low speeds during low loading periods.

b. Compressor is electrically protected through the VFD.

c. Compressor utilizes a sound jacket for noise reduction.

d. A sight glass is provided for air cooled system oil charging.

H. Condensate Pump

1. ACRD100 series and ACRD200 series: Dual factory installed and wired condensate pumps

shall pump at 9.8 l/h (2.6 g/hr) at 4.9 m (16 ft) of head. Each pump shall have dual internal

floats.

2. ACRD500 series: A single factory installed and wired condensate pump shall pump at

11.8 l/h (8.45 g/hr) at 3.5 m (11.5 ft) of head. The pump shall have dual internal floats.

3. Each pump shall have a condensate reservoir made of polymeric materials to prevent

corrosion.

I. Filters

1. ACRD100 series and ACRD200 series:

a. The standard filters shall be 20% efficient per ASHRAE 52.1, MERV 1 per ASHRAE

52.2, 1/2 in washable mesh filter.

b. The optional filter shall be high capacity 2 in pleated, UL 900 Class 2, moisture resistant,

with average atmospheric dust spot efficiency of 30%, per AHRAE Standard 52.1, MERV

8 per ASHRAE 52.2.

2. ACRD500 series:

a. The standard pleated filters shall be 96mm (3.75in) deep, and 30% efficient per ASHRAE

Standard 52.1, UL Class 2 (MERV 8 per ASHRAE 52.2). Filters shall be EN779 G4

efficient.

b. The optional filter shall be 85% efficient per ASHRAE Standard 52.1 (MERV 13 per

ASHRAE 52.2, EN779 F7).

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