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OUTDOOR UNIT
ROMH18AFXZJ
1. Specifications
1-1. Model: ROMH18AFXZJ
Type Inverter heat pump
Model name
ROMH18AFXZJ
Power source 1Ø 208/230 V 60 Hz
Available voltage range 187—264V
Connectable indoor unit
Number 2
Total capacity range 14,000 to 21,000 Btu/h
Combination of indoor unit
Non-duct
RIWH9AVFJ × 2
Duct
RIDH9AVFJ × 2
Mix
Capacity
Cooling
Rated
Btu/h 18,000
kW 5.28
Min.—Max.
Btu/h 6,100—21,000
kW 1.8—6.2
Heating
Rated
Btu/h 22,000
kW 6.42
Min.—Max.
Btu/h 6,800—24,400
kW 2.0—7.2
Input power
Cooling
Rated
kW
1.44 1.49 1.46
Max. 2.06 2.14 2.10
Heating
Rated 1.87 1.83 1.84
Max. 2.10 2.08 2.09
Current
Cooling
Rated A
6.3 6.6 6.4
Heating 8.2 8.0 8.1
EER Cooling Rated Btu/W 12.5 12.1 12.3
SEER *
1
Cooling - 18.0 16.0 17.0
COP Heating Rated W/W 3.44 3.52 3.48
HSPF *
1
Heating - 9.03 9.0 9.15
Starting current A 8.2
Maximum operating current *
2
A10.0
Fan
Type × Q'ty Propeller × 1
Airflow rate
Cooling
CFM (m
3
/h)
1,795 (3,050)
Heating 1,619 (2,750)
Motor
Type × Quantity DC motor × 1
Output W 100
Sound pressure level
Cooling
Rated dB (A)
49
Heating 49
Heat exchanger
Dimension (H × W × D) in (mm) 26-7/16 × 35-7/16 × 1-7/16 (672 × 900 × 36.38)
Fin pitch FPI 18
Rows × Stages 2 × 32
Pipe type (Material) Grooved H-pin (Copper)
Fin
Type (Material) Corrugate (Aluminum)
Surface treatment Corrosion resistance (Blue Fin)
Refrigerant
Type R410A
Charge lb (g) 4 lb 14 oz (2,200)
Refrigerant oil
Type POE
Amount
in
3
(cm
3
)
39.7 (650)
Enclosure
Material Painted galvanized steel
Color
Beige
(Approximate color of MUNSELL 10YR 7.5/1.0NN)
Dimensions
Net
(H × W × D) in (mm)
27-9/16 × 35-7/16 × 13 (700 × 900 × 330)
Gross 34-1/16 × 41-5/16 × 17-1/2 (865 × 1,050 × 445)
Weight
Net
lb (kg)
119 (54)
Gross 137 (62)
Connection pipe
Size
Liquid
in (mm)
Ø1/4 (Ø6.35) × 2
Gas Ø3/8 (Ø9.52) × 2
Method Flare
Pre-charge length (Total)
ft (m)
98 (30)
Max. length (Total) 164 (50)
Max. length (Each) 82 (25)
Min. length (Total) 49 (15)
Min. length (Each) 16 (5)
Max. height difference between outdoor unit and each
indoor units
49 (15)
Max. height difference between indoor units 33 (10)
Operation range
Cooling
°F (°C)
14 to 115 (-10 to 46)
Heating 5 to 75 (-15 to 24)
NOTES:
• Specifications are based on the following conditions:
– Power source of specifications : 230 V
– Pipe length: 24.6 ft (7.5 m), Height difference: 0 ft (0 m) [Outdoor unit—Indoor unit]
– Cooling: Indoor temperature of 80 °FDB (26.7 °CDB)/67 °FWB (19.4 °CWB), and outdoor temperature of 95 °FDB (35°CDB)/75 °FWB (23.9 °CWB).
– Heating: Indoor temperature of 70 °FDB (21.1 °CDB)/60 °FWB (15.6 °CWB), and outdoor temperature of 47 °FDB (8.3 °CDB)/43 °FWB (6.1 °CWB).
– *1: Test conditions are based on AHRI 210/240.
– *2: The maximum current is the maximum value when the operated within the operation range.
• For other combination, refer to the combination table.
• The protective function might work when using it outside the operation range.