Specification Sheet
Information and product specications contained in this document are subject to change without notice. REV 2020-01
Specications
Tankless Electric Water Heater
Series Three
Staged or Parallel Models (Three Heating Modules) Thermostatic Control
TEMPERATURE RISE °F
MODEL NUMBER kW AMPS
RECOMMENDED
WIRE SIZE
(75° C/CU)
TURN-ON
(GPM)
MAX FLOW
(GPM)
2.5
GPM
3.0
GPM
4.0
GPM
5.0
GPM
VOLTS 240*
C
EX280T2T
28.5 119(3X40) 8 AWG 0.7 4.0 78° 65° 49° –
C
EX280T2T (derated 208V performance)
20.9 100(3X33) 8 AWG 0.7 4.0 57° 48° 36° –
C
EX280T2T ML
28.5 119(3X40) 8 AWG 0.3 4.0 78° 65° 49° –
C
EX280T2T FS
28.5 119(3X40) 8 AWG 0.7 4.0 78° 65° 49° –
C
EX280T2T S
28.5 119(3X40) 8 AWG 0.7 4.0 78° 65° 49° –
C
EX280T3
28.5 119(3X40) 8 AWG 2.0 5.0 78° 65° 49° 39°
C
EX280T3 (derated 208V performance)
20.9 100(3x33) 8 AWG 2.0 5.0 57° 48° 36° 29°
C
EX280T3 S
28.5 119(3X40) 8 AWG 2.0 5.0 78° 65° 49° 39°
C
EX280T3 FS
28.5 119(3X40) 8 AWG 2.0 5.0 78° 65° 49° 39°
CNL Models
C
EX280T2T CNL
28.5 119 1 AWG 0.7 4.0 78° 65° 49° –
C
EX280T2T ML CNL
28.5 119 1 AWG 0.3 4.0 78° 65° 49° –
C
EX280T2T FS CNL
28.5 119 1 AWG 0.7 4.0 78° 65° 49° –
C
EX280T2T S CNL
28.5 119 1 AWG 0.7 4.0 78° 65° 49° –
C
EX280T3 CNL
28.5 119 1 AWG 2.0 5.0 78° 65° 49° 39°
Sux Denitions
T2T Staged heating elements
T3 Parallel heating elements
FS Factory set ambient to 180°F
ML Multi lavs 0.3 turn on. Staged
up to 6 lavs 105°F-110°F temp
setting
S
Sanitation 180°F
15.19
12.14
ELECTRICAL
CONNECTION (3)
.90
1.87
1.30
7.02
4.32
OUTLET
INLET
“EX” NEMA 4/4X
20.00
20.00
18.50
18.50
4XØ .500
MOUNTING HOLES
1.93
2.89
2.21 7.02
8.78
INLETOUTLET
* 240V units can be used on 208V single phase with 25% reduced temperature output. Please note per UL standards the rating plate and installation instructions will all be according
to a 240V applied voltage. Check with local ofcials prior to derating the electrical infrastructure.
"C" indicates evaluation and compliance to either Underwriters Laboratories (UL) or Intertek (ETL) under CAN/CSA-C22.2 No.
64/No. 88. CNL SKUs are Canada specic.