Electric Installation - Keltech CNA-36 Installation Manual

Installation
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;
B
large enough 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 .
Keltech • 215-1814 Rev. C; ECN 150010
CNA & CNAR ELECTRICAL SPECIFICATIONS FOR HEATER**
Model Voltage
CNA-363/600D 600
CNA-543/600D 600
CNA-633/600D 600
CNA-723/600D 600
CNA-1083/600D 600
CNA-1263/600D 600
CNA-1443/600D 600
CNA-363/480D 480
CNA-543/480D 480
CNA-633/480D 480
CNA-723/480D 480
CNA-1083/480D 480
CNA-1263/480D 480
CNA-1443/480D 480
CNA-363/415D 415
CNA-543/415D 415
CNA-633/415D 415
CNA-723/415D 415
CNA-1083/415D 415
CNA-1263/415D 415
CNA-1443/415D 415
CNA-363/400D 400
CNA-543/400D 400
CNA-633/400D 400
CNA-723/400D 400
CNA-1083/400D 400
CNA-1263/400D 400
CNA-1443/400D 400
CNA-363/380D 380
CNA-543/380D 380
CNA-633/380D 380
CNA-723/380D 380
CNA-1083/380D 380
CNA-1263/380D 380
CNA-1443/380D 380
* Based on the NEC Table 310 .15 for 75°C insulated wire @ 30°C Ambient
** CNAR (reverse models) electrical specifications are same as CNA heater
models .
7/13/2015
CNA-Series Tankless Heater
Min Wire
Amps 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*
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