ELECTRICAL HOOK-UP
WARNING
HAZARD OF ELECTRICAL SHOCK! BEFORE BEGINNING ANY WORK ON THE
INSTALLATION, MAKE SURE THE ELECTRICAL SUPPLY TO THE HEATER IS TURNED
“OFF”. FAILURE TO DO THIS COULD RESULT IN DEATH, SERIOUS BODILY INJURY,
OR PROPERTY DAMAGE.
WARNING
WATER HEATERS EQUIPPED FOR ONE VOLTAGE ONLY: CHECK THE RATING PLATE
ON THE FRONT OF THE UNIT. DO NOT USE THIS WATER HEATER WITH ANY VOLTAGE
OTHER THAN THE ONE SHOWN ON THE MODEL RATING PLATE. FAILURE TO DO SO
CAN RESULT IN DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. IF YOU
HAVE ANY QUESTIONS OR DOUBTS CONSULT YOUR ELECTRIC COMPANY.
This heater must have its own independent circuit using five wires; three live, neutral and
one ground, of the appropriate rating protected by the correctly rated three pole breaker.
DANGER
FAILURE TO GROUND THE SYSTEM MAY RESULT IN DEATH OR SERIOUS INJURY
IMPORTANT
BEFORE SWITCHING “ON” THE POWER AT THE MAIN CIRCUIT BREAKER PANEL MAKE
SURE THAT THE HOT WATER CIRCUIT IS FREE OF AIR POCKETS OR PREMATURE
FAILURE OF THE ELEMENT WILL OCCUR. TO DO THIS OPEN ALL HOT WATER OUTLETS
ONE AT A TIME FOR A MINUTE OR TWO UNTIL THE WATER FLOW IS CONTINUOUS AND
FREE FROM “GULPING” AND FROM VISIBLE AIR POCKETS.
5
RATINGS OF THREE PHASE MODELS
MODEL kW VOLTAGE CURRENT TEMPERATURE RISE
0
F RECOMMENDED
RATING PER PHASE 1.5 GPM 2.0 GPM 2.5 GPM 3.0 GPM 3.5 GPM WIRE SIZE
EX 180 T3 18 kW 480/277 V 21.7 A/PHASE 82
0
61
0
49
0
41
0
35
0
10
AWG
EX 240 T3 24 kW 480/277 V 28.9 A/PHASE -
82
0
65
0
54
0
47
0
10 AWG
EX 320 T3 32 kW 480/277 V 38.5 A/PHASE -
-
87
0
73
0
62
0
8 AWG
