Installation Guide

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10. Technical Data
DHE
DHE 12 DHE 15 DHE 20 DHE 24
3
DHE 29
3
DHE 36
4
612446 612447 612448 612449 612450 612451
Electrical details
Phase single single
5
single
5
single
5
single
5
single
5
Frequency Hz 50/60 50/60 50/60 50/60 50/60 50/60
Voltage V 208 240 208 240 208 240 208 240 208 240 208 240
Wattage kW 9 12 10.8 14.4 14.4 19.2 18 24 21.6 28.8 27 36
Amperage draw A 44 50 2 x 26 2 x 30 2 x 35 2 x 40 2 x 44 2 x 50 3 x 35 3 x 40 3 x 44 3 x 50
Required number & size of circuit
breakers
(double pole)
1
A 1x 60 2 x 40 2 x 50 2 x 60 3 x 50 3 x 60
Required wire size and number of runs
2
AWG Copper 1 x 6/2 2 x 8/2 2 x 8/2 2 x 6/2 3 x 8/2 3 x 6/2
Connections
Water connection 3/4˝ NPT 3/4˝ NPT 3/4˝ NPT 3/4˝ NPT 3/4˝ NPT 3/4˝ NPT
Hydraulic data
Volume of water in unit l 0.5 1.0 1.0 1.0 1.5 1.5
Volume of water in unit gal 0.13 0.26 0.26 0.26 0.39 0.39
Minimum water flow to activate unit l/min 1.4 1.9 1.9 1.9 2.9 2.9
Minimum water flow to activate unit GPM 0.37 0.50 0.50 0.50 0.77 0.77
Maximum permissible inlet temperature °C 55 55 55 55 55 55
Maximum permissible inlet temperature °F 131 131 131 131 131 131
Application limits
Maximum permissible pressure MPa 1.0 1.0 1.0 1.0 1.0 1.0
Maximum permissible pressure PSI 150 150 150 150 150 150
Test pressure MPa 2.0 2.0 2.0 2.0 2.0 2.0
Test pressure PSI 300 300 300 300 300 300
Features
Temperature display dial dial dial dial dial dial
Cover and back panel Sheet steel Sheet steel Sheet steel Sheet steel Sheet steel Sheet steel
Color gray gray gray gray gray gray
Dimensions
Height mm 369 369 369 369 369 369
Height in 14.52 14.52 14.52 14.52 14.52 14.52
Width mm 420 420 420 420 420 420
Width in 16.54 16.54 16.54 16.54 16.54 16.54
Depth mm 117 117 117 117 117 117
Depth in 4.61 4.61 4.61 4.61 4.61 4.61
Weights
Weight kg 6.1 7. 3 7. 3 7. 3 8.6 8.6
Weight lb 13.5 16.1 16.1 16.1 19 19
1
This is our recommendation as the manufacturer. Check local codes for compliance if necessary. Tankless water heaters are considered a non-continuous load.
2
Copper must be used. Conductors should be sized to maintain a voltage drop of less than 3% under load.
3
Requires a minimum of 200 A main service.
4
Requires a minimum of 300 A main service
5
29/Pro 29 & 36/Pro 36 may be wired for balanced 3-phase 208V. 15/Pro 15, 20/Pro 20, 24/Pro 24 may be wired for unbalanced 3-phase 208V.