Service Manual
Table Of Contents
Specifications SiUS281811E
28 Part 1 General Information
3.2 Heat Pump
3.2.1 Ceiling Mounted Cassette Type (Round Flow With Sensing)
Model
name
Indoor unit FCQ18TAVJU FCQ24TAVJU
Outdoor unit RZQ18TAVJU RZQ24TAVJU
Power supply 1 phase, 208/230 V, 60 Hz 1 phase, 208/230 V, 60 Hz
1 4 Cooling capacity Btu/h (kW) 18,000 (5.3) 24,000 (7.0)
2 4 Heating capacity Btu/h (kW) 20,000 (5.9) 27,000 (7.9)
3 4 Heating capacity Btu/h (kW) 12,000 (3.5) 18,000 (5.3)
SEER (Rated) 18.6 18.5
EER (Rated) Btu/h∙W 13.0 12.0
HSPF (Rated) 10.1 10.2
Indoor unit FCQ18TAVJU FCQ24TAVJU
Casing color Galvanized steel plate Galvanized steel plate
Dimensions: (H×W×D) in (mm) 10–1/16 × 33–1/16 × 33–1/16 (256 × 840 × 840) 10–1/16 × 33–1/16 × 33–1/16 (256 × 840 × 840)
Coil Type Cross fin coil Cross fin coil
Rows×Stages×FPI 3 × (12 + 15 × 2) × (20 + 21 × 2) 3 × (12 + 15 × 2) × (20 + 21 × 2)
Face area ft² (m
2
) 4.59 (0.427) 4.59 (0.427)
Fan Model QTS48C15M QTS48C15M
Type Turbo fan Turbo fan
Motor output W 48 48
Airflow rate
(H/M/L)
cfm
(m
3
/min)
742/618/477 (21.0/17.5/13.5) 777/618/477 (22.0/17.5/13.5)
External static
pressure
inH
2
O (Pa)
——
Sound pressure level (H/M/L) dB(A) 35.5/32.0/28.0 36.0/32.0/28.0
Air filter ——
Weight lbs (kg) 63 (28.5) 63 (28.5)
Connecting
Pipes
Liquid Pipe in (mm) 3/8 (9.5) (Flare connection) 3/8 (9.5) (Flare connection)
Gas Pipe in (mm) 5/8 (15.9) (Flare connection) 5/8 (15.9) (Flare connection)
Drain Pipe in (mm) VP25 (External dia. 1–1/4 (32), internal dia. 1 (26)) VP25 (External dia. 1–1/4 (32), internal dia. 1 (26))
Remote controller
(option)
Wired BRC1E73, BRC2A71 BRC1E73, BRC2A71
Wireless — —
Decoration
panels
(option)
Model BYCQ125B–W1 / BYCQ125BGW1 BYCQ125B–W1 / BYCQ125BGW1
Color Fresh white Fresh white
Dimensions:
(H×W×D)
in (mm) 2 × 37–3/8 × 37–3/8 / 5–1/8 × 37–3/8 × 37–3/8
(50 × 950 × 950 / 130 × 950 × 950)
2 × 37–3/8 × 37–3/8 / 5–1/8 × 37–3/8 × 37–3/8
(50 × 950 × 950 / 130 × 950 × 950)
Air filter Resin net (with mold resistance) Resin net (with mold resistance)
Weight lbs (kg) 12.2 (5.5) / 22.1 (10.0) 12.2 (5.5) / 22.1 (10.0)
Outdoor unit RZQ18TAVJU RZQ24TAVJU
Casing color Ivory white Ivory white
Dimensions: (H×W×D) in (mm) 39 × 37 × 12–5/8 (990 × 940 × 320) 39 × 37 × 12–5/8 (990 × 940 × 320)
Coil Type Cross fin coil Cross fin coil
Rows×Stages×FPI 2 × 44 × 19 2 × 44 × 19
Face area ft² (m
2
) 9.5 (0.88) 9.5 (0.88)
Compressor Model 2YC63ABXDD 2YC63ABXDD
Type Hermetically sealed swing type Hermetically sealed swing type
Motor output kW 1.9 1.9
Fan Model P51J11F P51J11F
Type Propeller fan Propeller fan
Motor output W 200 200
Airflow rate cfm
(m
3
/min)
2,682 (76) 2,682 (76)
Weight lbs (kg) 172 (78) 172 (78)
Sound pressure level dB(A) 58 58
Connecting
Pipes
Liquid Pipe in (mm) 3/8 (9.5) (Flare connection) 3/8 (9.5) (Flare connection)
Gas Pipe in (mm) 5/8 (15.9) (Flare connection) 5/8 (15.9) (Flare connection)
Drain Pipe in (mm) 1 (26) (Hole) 1 (26) (Hole)
Safety devices High pressure switch, Outdoor fan driver overload
protector, Inverter overload protector, Fusible plugs, Fuse
High pressure switch, Outdoor fan driver overload
protector, Inverter overload protector, Fusible plugs, Fuse
Capacity Control % 14-100 14-100
Refrigerant control Electronic expansion valve Electronic expansion valve
Ref.
piping
Standard length ft (m) 25 (7.6) 25 (7.6)
Max. length ft (m) 164 (50) 164 (50)
Max. height
difference
ft (m)
98 (30) 98 (30)
Refrigerant Model R-410A R-410A
Charge lbs (kg) 6.4 (2.9) 6.4 (2.9)
Ref. oil Model DAPHNE FVC50K DAPHNE FVC50K
Charge L 1.08 1.08
Drawing
No
Specification C: 4D115508 C: 4D115508
Sound (indoor) C: 4D087483B C: 4D087474B
Sound (outdoor) C: 4D101947D C: 4D101947D
Notes:
1 Indoor temp.: 80°FDB (26.7°CDB), 67°FWB (19.4°CWB) / Outdoor temp.: 95°FDB (35.0°CDB) / Equivalent piping length: 25 ft (7.6 m), level difference: 0 ft (0 m).
2 Indoor temp.: 70°FDB (21.1°CDB) / Outdoor temp.: 47°FDB (8.3°CDB), 43°FWB (6.1°CWB) / Equivalent piping length: 25 ft (7.6 m), level difference: 0 ft (0 m).
3 Indoor temp.: 70°FDB (21.1°CDB) / Outdoor temp.: 17°FDB (−8.3°CDB), 15°FWB (−9.4°CWB) / Equivalent piping length: 25 ft (7.6 m), level difference: 0 ft (0 m).
4 Capacities are net, including a deduction for cooling (an addition for heating) for indoor fan motor heat.