KFFEH: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
Table 2 – Electric Heater Electrical Data
FC
Size
HEATER PART NO.
kW
P
H
A
S
E
Internal
Circuit
Protection
HEATER AMPS
*
208/230V
†
*. Includes blower motor amps of largest fan coil used with heater. Consult Product Data for specific motor amps.
†. For 240V, multiply 230V heater amps by 1.04. Wire sizing and over-current protection may need adjustment per local code requirements.
MIN AMPACITY
*
208/230V
†
BRANCH CIRCUIT
Min Wire Size (AWG)
208/230V
‡
‡. Copper wire must be used. If other than uncoated (non-plated), 75°C ambient, copper wire (solid wire for smaller, and stranded wire for larger than 10 AWG) is used, consult applicable tables of the National Electric Code (ANSI/NFPA 70).
Min Gnd Wire Size
208/230V
‡
Max Fuse/Ckt Bkr
Amps 208/230V
Single
Circuit
Dual Circuit
Single
Circuit
Dual Circuit
Single
Circuit
Dual Circuit
Single
Circuit
Dual Circuit
Single
Circuit
Dual Circuit
240V 208V L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4 L1,L2 L3,L4
24 KFFEH0401N03 3 2.3 1 None 10.7/11.9 — — 18.4/19.9 — — 12/12 — — 12/12 — — 20/20 — —
18 KFFEH8401N03 3 2.3 1 None 10.7/11.9 — — 17.0/18.5 — — 12/12 — — 12/12 — — 20/20 — —
24-42 KFFEH0501N05 5 3.8 1 None 17.8/19.7 — — 27.5/29.9 — — 10/10 — — 10/10 — — 30/30 — —
24-42 KFFEH2401C05 5 3.8 1 Ckt Bkr 17.8/19.7 — — 27.5/29.9 — — 10/10 — — 10/10 — — 30/30 — —
48-60 KFFEH0501N05 5 3.8 1 None 17.8/19.7 — — 29.9/32.3 — — 10/8 — — 10/10 — — 30/35 — —
48-60 KFFEH2401C05 5 3.8 1 Ckt Bkr 17.8/19.7 — — 29.9/32.3 — — 10/8 — — 10/10 — — 30/35 — —
18 KFFEH8501N05 5 3.8 1 None 17.8/19.7 — — 25.9/28.3 — — 10/10 — — 10/10 — — 30/30 — —
18 KFFEH8401C05 5 3.8 1 Ckt Bkr 17.8/19.7 — — 25.9/28.3 — — 10/10 — — 10/10 — — 30/30 — —
24-60 KFFEH0801N08 8 6.0 1 None 28.5/31.5 — — 43.3/47.0 — — 8/8 — — 10/10 — — 45/50 — —
24-60 KFFEH2501C08 8 6.0 1 Ckt Bkr 28.5/31.5 — — 43.3/47.0 — — 8/8 — — 10/10 — — 45/50 — —
18 KFFEH8801N08 8 6.0 1 None 28.5/31.5 — — 39.3/43.0 — — 8/8 — — 10/10 — — 40/45 — —
18 KFFEH8501C08 8 6.0 1 Ckt Bkr 28.5/31.5 — — 39.3/43.0 — — 8/8 — — 10/10 — — 40/45 — —
24-60 KFFEH0901N10 10 7.5 1 None 35.6/39.4 — — 52.1/56.9 — — 6/6 — — 10/10 — — 60/60 — —
24-60 KFFEH2601C10 10 7.5 1 Ckt Bkr 35.6/39.4 — — 52.1/56.9 — — 6/6 — — 10/10 — — 60/60 — —
18 KFFEH8901N10 10 7.5 1 None 35.6/39.4 — — 48.1/52.9 — — 8/6 — — 10/10 — — 50/60 — —
18 KFFEH8601C10 10 7.5 1 Ckt Bkr 35.6/39.4 — — 48.1/52.9 — — 8/6 —
— 10/10 — — 50/60 — —
30-60
KFFEH2901N09
**
**. Field convertible to 3 phase.
9 6.8 1 None 32.2/35.6 — — 47.9/52.1 — — 8/6 — — 10/10 — — 50/60 — —
30-60 KFFEH2901N09 9 6.8 3 None 18.6/20.6 — — 30.9/33.4 — — 8/8 — — 10/10 — — 40/40 — —
24-60
KFFEH3001F15
††
††. Single circuit application of F15 and F20 heaters requires single-point wiring kit accessory.
15 11.3 1 Fuse 53.4/59.1 35.6/39.4 17.8/19.7 74.4/81.5 52.1/56.9 22.3/24.6 4/4 6/6 10/10 8/8 10/10 10/10 80/90 60/60 25/25
24-60 KFFEH3101C15 15 11.3 1 Ckt Bkr 53.4/59.1 35.6/39.4 17.8/19.7 74.4/81.5 52.1/56.9 22.3/24.6 4/4 6/6 10/10 8/8 10/10 10/10 80/90 60/60 25/25
36-60 KFFEH1601315 15 11.3 3 Fuse 30.8/34.1 — — 46.1/50.3 — — 8/6 — — 10/10 — — 50/60 — —
42-60 KFFEH2001318 18 13.5 3 None 37.2/41.2 — — 54.1/59.1 — — 6/6 — — 10/10 — — 60/70 — —
30-60
KFFEH3201F20
††
20 15.0 1 Fuse 71.2/78.8 35.6/39.4 35.6/39.4 96.6/106.1 52.1/56.9 44.5/49.3 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 45/50
30-60 KFFEH3301C20 20 15.0 1 Ckt Bkr 71.2/78.8 35.6/39.4 35.6/39.4 96.6/106.1 52.1/56.9 44.5/49.3 3/2 6/6 8/8 8/6 10/10 10/10 100/110 60/60 45/50
48-60
KFFEH3401F24
‡‡
‡‡. Field convertible to 1 phase, single or multiple supply circuit.
24 18.0 3 Fuse 49.3/54.6 — — 69.3/75.9 — — 4/4 — — 8/8 — — 80/80 — —
48-60 24 18.0 1 Fuse 85.5/94.5 — — 114.5/125.8 — — 2/1 — — 6/6 — — 125/150 — —
48-60
KFFEH3501F30
‡‡
30 22.5 3 Fuse 61.7/68.2 — — 84.8/92.9 — — 4/3 — — 8/8 — — 90/100 — —
48-60 30 22.5 1 Fuse 106.8/118.1 — — 141.1/155.3 — — 0/00 — — 6/6 — — 150/175 — —
Table 3 – Field Multipoint Wiring or 24- and 30-kW Single Phase
HEATER PART NO.
kW
PHASE
HEATER AMPS 208/230V MIN AMPACITY 208/230V
*
*. Includes blower motor amps of largest fan coil used with heater.
MIN WIRE SIZE (AWG)
208/230V
†
†. Copper wire must be used. If other than uncoated (non-plated), 75°C ambient, copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the NEC (ANSI/NFPA 70).
MIN GND
WIRE SIZE
208/230V
MAX FUSE/CKT BKR AMPS
208/230V
240V 208V L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6 L1,L2 L3,L4 L5,L6
KFFEH3401F24A
‡
‡. Field convertible to 1 phase, single or multiple supply circuit.
24 18.0 1 28.5/31.5 28.5/31.5 28.5/31.5 43.3/47.0 35.6/39.4 35.6/39.4 8/8 8/8 8/8 10/10 50/50 40/40 40/40
KFFEH3501F30A
‡
30 22.5 1 35.6/39.4 35.6/39.4 35.6/39.4 52.1/56.9 44.5/49.3 44.5/49.3 6/6 8/8 8/8 10/10 60/60 45/50 45/50