9
Product Data
Due to our policy of continuous product innovation, some specifications may change without notification.
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GENERAL DATA
Water Mini Unit Specifications and Electrical Data
1
Cooling – Indoor 80°F DB/66°F WB, Water Temp. Entering 86°F;
Heating- Indoor 68°F DB, Water Temp. Entering 68°F.
2
Voltage tolerance is ±10%.
3
Sound pressure levels as tested in anechoic chamber under ISO
Standard 3745.
4
Refer to the Refrigerant Piping Section of this manual for correct
line sizing. Contractor MUST use LG manufactured Y-branch fittings
only. Designer must verify refrigerant piping design configuration
using LG’s computerized refrigerant piping CAD/calculation (LATS)
Software to layout and design the refrigerant piping system.
5
Calculated from ∆T = Total Heat of Rejection / (Nominal flow rate
x 500).
Table 1: General Data—ARWN038GA2, ARWN048GA2, ARWN053GA2 Water Mini Units.
Table 2: 208-230V, 60Hz, 1-Phase Water Mini Unit Electrical Characteristics.
Nominal Tons
Unit Model No.
Compressor Qty.
Compressor Motor RLA
MSC
MCA
MOP
3.0
ARWN038GA2
1
20.8
-
26
45
4.0
ARWN048GA2
1
21.2
-
26.5
45
4.4
ARWN053GA2
1
21.6
-
27
45
MCA = Minimum Circuit Ampacity.
MOP = Maximum Overcurrent Protection is calculated as follows: (Largest motor FLA x 2.25) + (Sum of
other motor FLA) rounded down to the nearest standard fuse size.
Allowable voltage range is between 208–230 volts only (tolerance is 10%).
Maximum allowable voltage imbalance is 2%.
Power wiring to be sized to meet local or NEC codes.
Measurements are taken with no attenuation and units operating at full load nominal operating
condition.
Measurements are taken 4.9 feet above the finished floor and a distance of 3.3 feet from the face of the
fan discharge.
3.0 Ton
4.0 Ton
4.4 Ton
Model Number
ARWN038GA2
ARWN048GA2
ARWN053GA2
Nominal Capacity / Input Power
Cooling Capacity (Btu/h)
1
38,200
47,800
52,900
Cooling Input Power (kW)
2.1
2.7
3.2
Heating Capacity (Btu/h)
1
42,600
54,600
61,400
Heating Input Power (kW)
2.2
2.9
3.5
Compressor
Type
Inverter Rotary
Inverter Rotary
Inverter Rotary
Power Supply (volt/hz/phase)
2
208-230 / 60 / 1
208-230 / 60 / 1
208-230 / 60 / 1
MCA (A)
26
26.5
27
MOP (A)
45
45
45
System Data
Sound Pressure (dBA)
3
52
53
54
Heat Rejected to Equipment Room (Btu/h)
512
512
512
Net Weight (lbs)
168
168
168
Shipping Weight (lbs)
181
181
181
Dimensions (W x H x D)
20-5/8 x 42-1/2 x 13-1/8
20-5/8 x 42-1/2 x 13-1/8
20-5/8 x 42-1/2 x 13-1/8
Max. Qty Indoor Units
6
8
9
Refrigerant Piping Connections
4
Vapor Line OD (in)
3/4 Braze
3/4 Braze
3/4 Braze
Liquid Line OD (in)
3/8 Braze
3/8 Braze
3/8 Braze
Expansion Device
Electronically Controlled (EEV) Electronically Controlled (EEV) Electronically Controlled (EEV)
Factory Refrigerant Charge (R410A [lbs])
2.2
2.2
2.2
Water Side
Heat Exchanger
Stainless Steel Plate
Stainless Steel Plate
Stainless Steel Plate
Water Volume in Heat Exchanger (gal.)
0.2
0.2
0.2
Water Inlet/Outlet Connection
Size (in)
1-1/4 FPT
1-1/4 FPT
1-1/4 FPT
Nominal Flow Rate Total (GPM)
10.6
13.2
15.9
Range of Flow (GPM)
5.5-13.3
6.9-16.5
8.3-19.9
Entering water temp. range (°F)– Cooling
50-113
50-113
50-113
Entering water temp. range (°F)– Heating
23-113
23-113
23-113
Total Heat of Rejection (Btu/h)
44,330
55,550
56,640
Total Heat of Absorption (Btu/h)
35,087
44,697
49,448
Pressure Drop (ft)
4.7
6.9
9.5
Maximum Water Pressure (psi)
640
640
640
ΔT (°F)
5
8
8
7