Technical FAQs
Technical FAQs
Issue: What are the operational conditions for an InRoom (Stulz) Unit
Product line: ACPDX21-86, ACPCW40-150
Environment: All Serial Numbers
Cause: Install
Resolution:
The InRoom precision air conditioning units operate within the following ranges:
Room Conditions:
Between 18°C (64°F), 40% Relative Humidity (R.H.), and 27°C (81°F), 55% R.H.
Outdoor ambient conditions: Lower limit: -10°C (14°F) Upper limit: Depending on selected condenser
Voltage:
460V / 3ph / 60 Hz
208-230V / 3ph / 60 Hz
Voltage tolerance: +/- 10%
Voltage imbalance: <3%
Frequency:60 Hz +/- 1%
Chilled water-/cooling water pipes:
Maximum water head pressure: 10 bar (145 psi)
Maximum equivalent length of piping between the cooling unit and the air cooled condenser: 60 m (200 ft)
Maximum level difference between the condenser and the cooling unit: 5 m (16 ft) when the condenser is below the cooling unit
Storage conditions:
Temperature: -20 - +42°C (-4 - +107.6°F)
Humidity: (% R. H.): 5 - 95
Atmospheric pressure: 70 - 110 kPa (10 - 16 psi)
Design Conditions
Return air conditions for evaporator capacity (DX): 24°C (75°F) 50% R. H.
Return air conditions for cooling capacity (CW): 24°C (75°F) 50% R.H.
Entering water temperature (EWT) for CW coil: 7°C (44.6°F)
Leaving water temperature (LWT) for CW coil: 12°C (53.6°F)
Condensing temperature: 45°C (113°F)
Maximum condensing temperature: 60°C (140°F)
Cooling fluid (DX): 30% Glycol
Fluid inlet temperature (G): 30°C (86°F)
Fluid outlet temperature (G): 40°C (104°F)
Chilled water medium (CW): 0% Glycol
Data is valid for: 460V / 3ph /60 Hz
Downflow units with an external static pressure: 20 Pa (0.08 in w g)
Upflow units with an external static pressure: 50 Pa (0.20 in w g)