APC IN ROW RD ACRD101 Service Manual download pdf (Page 53)

47InRow RD Technical Data Manual

J. Temperature Sensors

1. Internal Temperature Sensors: Thermistor temperature sensors shall be mounted behind the

front and rear doors to provide control inputs based on supply and return air temperature.

Sensor accuracy shall be within ± 1 degree F accuracy.

2. Remote Temperature Sensors

a. ACRD500 series: Three remote rack inlet temperature sensors shall be shipped with the

unit to provide control input based on rack inlet temperature.

b. ACRD100 and ACRD200 series: One remote rack inlet temperature sensor shall be

shipped with the unit to provide control input based on rack inlet temperature.

K. Selectable Top Or Bottom Piping (ACRD500 Series)

1. Pipe connections: The unit is equipped to facilitate field connections from either the top or

bottom. Unit connections shall be made internal to the unit.

2. Pipe adapter: The unit shall include two pipe adapters that convert a 31.75-mm (1 1/4-in) NPT

to a 31.75-mm (1 1/4-in) BSPT (manufactured in accordance with BS21). Pipe adapters shall

ship loose with the unit for field installation where applicable.

L. Cable Water Detector (Optional)

1. The optional leak detection sensing cable shall be shipped loose with the unit. If water or other

conductive liquids contact the cable anywhere along its length, the main controller visually

and audibly annunciates the leak.

2. The optional detector shall be provided with 6.1 m (20 ft) of cable. Cable may be cascaded up

to 24.4 m (80 ft).

M. Bridge Power Cable Trough

1. An overhead power distribution bridge, that sits between adjacent NetShelter racks and allows

for removal of the unit without disrupting the overhead power cabling, is available as an

accessory.

2. Cable trough shall be constructed of 16 gauge cold rolled steel with a black powder coat finish.

N. Bridge Data Partition

1. An overhead cable distribution, that sits between adjacent NetShelter racks and allows for

removal of the unit without disrupting overhead cabling, is available as an accessory.

2. Data partition shall be constructed of 16 gauge cold rolled steel with a black powder coat

finish.

O. Cooling Fluids (ACRD200 Series)

Water and solutions of propylene or ethylene glycol up to 50% may be used. Solutions of

brine or other aqueous salt are NOT permitted.

P. Freeze Protection (ACRD200 Series)

Per ASHRAE Handbook Fundamentals 2001 21.5, a maximum of 30% ethylene glycol and

35% propylene glycol are needed for freeze protection. See the ASHRAE handbook for more

details.

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APC IN ROW RD ACRD101 Service Manual Page 53