Electric Installation - Bradley Keltech SNA Série Manuel D'installation

SNA-Series Tankless Heater
3

Electric Installation

WARNING All Keltech heaters must be fused
in accordance with National
Electric Code (NEC) for the full
load amperage listed on the
nameplate rating for each heater.
WARNING Failure to properly ground the unit(s)
per the National Electric Code could
result in injury or death.
A
Open enclosure door .
NOTICE! Any option that requires field wiring
must be done with 600V cable per
the schematic that was shipped with
the heater.
NOTICE! Use a 4-core cable or multi-stranded
machine tool wire from an approved
isolating 3-pole switch or circuit
breaker.
NOTICE! Make sure the electrical cable is the
correct size to carry 100% of the full
load current. See table for proper
wire sizes.
Using a hole punch, cut a hole the proper
size for conduit connection; large enough
B
for the wire size for each heater . The
connectors need to be rated NEMA4/4X
to ensure proper sealing of the enclosure .
C
Run wires through the appropriate size
conduit .
Connect wires to the system terminal
D
block or fused disconnect inside the
enclosure .
E
Connect the ground wire to the stud
provided with the "Ground" label beneath it .
8
SNA & SNAR ELECTRICAL SPECIFICATIONS FOR HEATER**
Model
SNA-363/600D
SNA-543/600D
SNA-633/600D
SNA-723/600D
SNA-1083/600D
SNA-1263/600D
SNA-1443/600D
SNA-363/480D
SNA-543/480D
SNA-633/480D
SNA-723/480D
SNA-1083/480D
SNA-1263/480D
SNA-1443/480D
SNA-363/415D
SNA-543/415D
SNA-633/415D
SNA-723/415D
SNA-1083/415D
SNA-1263/415D
SNA-1443/415D
SNA-363/400D
SNA-543/400D
SNA-633/400D
SNA-723/400D
SNA-1083/400D
SNA-1263/400D
SNA-1443/400D
SNA-363/380D
SNA-543/380D
SNA-633/380D
SNA-723/380D
SNA-1083/380D
SNA-1263/380D
SNA-1443/380D
* Based on the NEC Table 310 .15 for 75°C insulated copper wire @ 30°C
Ambient . Aluminum wire requires larger gauges .
** SNAR (reverse models) electrical specifications are same as SNA heater
models .
6/10/2016
Not all available (optional) voltages are listed
in the table.
Voltage Amps
600
600
600
600
600
600
600
480
480
480
480
480
480
480
415
415
415
415
415
415
415
400
400
400
400
400
400
400
380
380
380
380
380
380
380
Bradley • 215-1815 Rev. E; ECN 16-17-016
Installation
Min Wire
kWatts
Size
35 36 8 AWG*
52 54 6 AWG*
61 63 4 AWG*
69 72 4 AWG*
104 108 2 AWG*
121 126 1 AWG*
139 144 1/0 AWG*
43 36 6 AWG*
65 54 4 AWG*
76 63 4 AWG*
87 72 3 AWG*
130 108 1 AWG*
152 126 1/0 AWG*
174 144 2/0 AWG*
38 27 8 AWG*
56 40 6 AWG*
65 47 4 AWG*
75 54 4 AWG*
113 81 2 AWG*
131 94 1 AWG*
150 108 1/0 AWG*
36 25 8 AWG*
53 37 6 AWG*
64 44 4 AWG*
72 50 4 AWG*
108 75 2 AWG*
126 87 1 AWG*
144 100 1/0 AWG*
35 23 8 AWG*
50 33 6 AWG*
59 39 6 AWG*
68 45 4 AWG*
103 68 2 AWG*
120 79 1 AWG*
137 90 1/0 AWG*