Quietside R410A Technical Information download pdf (Page 38)

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Basic Installation Tips

Sizing

Computer/Data Rooms : Basic sizing is 200-250 sqft per 12,000

Btu/h

Commercial/Retail : Basic sizing is 400-450 sqft per 12,000 Btu/h

Residential : Basic sizing is 550-600 sqft per 12,000 Btu/h

Low Ambient Cooling

Computer/Data Rooms and Commercial: As standard these units have low

ambient cooling capability down to 14 DegF outdoor temperature.

THESE UNITS CANNOT OPERATE IN COOLING BELOW 14 DEG F

AMBIENT TEMPERATURE, UNLESS EQUIPPED WITH AN APPROVED

WIND BAFFLE TO PROTECT THE OUTDOOR UNIT, IN WHICH CASE

PERFORMANCE CAN BE EXPECTED DOWN TO 0 DEG F OUTDOOR

TEMPERATURE. ALTHOUGH IF A PROLONGED OFF CYCLE IS

EXPERIENCED, THE UNIT MAY NOT RESTART.

R410A Refrigerant

Higher pressures (close to double) than R22, but the operating temperatures

are very similar to those with R22, for example

R410A A saturated suction temp of 45 DegF = Suction Pressure of 130

Psig R22 A saturated suction temp of 45 DegF = Suction

Pressure of 76 Psig

R410A uses a POE oil compared to the mineral oil used with R22, the POE oil

is attractive to water so it is very important to :

Minimize the time that the system is open to the atmosphere

Ensure that a deep vacuum is pulled on the system, 200 microns or less

Do not install any sight glasses or filter driers in the line set.

Note: It is not necessary to remove refrigerant for line sets shorter than

the specified length of the factory charge.

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Quietside R410A Technical Information Page 38