and that the unit has
been connected to a
ground in accordance with
applicable codes.
• Ensure
that
connections
correctly
made
to
ensure
proper
operation of the unit. It
is critical that the unit
be wired as shown.
Mixing up one set of
wires with another will
result in the failure of
the unit to operate
correctly even though it
turns on and otherwise
appears
to
function
properly.
5. The front cover of the unit
should be replaced and
reattached with two (2)
screws.
6. Ensure that all the air has
been purged from the
water lines before turning
on power to the unit.
Kindly check STEP 3 in
the plumbing installation
section. Restore power to
the unit by means of the
dedicated circuit breakers
in the main electrical
panel.
Part 5 - Installation Checklist
Water Heater Location
Close to area of heated water demand
Indoors and protected from freezing temperatures
Area free of flammable vapors / combustibles
Provisions made to protect area from water damage
Sufficient room to service heater
Relief Valve (If required by local, state, or provincial codes)
Temperature and Pressure Relief Valve properly installed and discharge line run to open drain
Discharge line protected from freezing
Wiring
Power supply voltage agrees with water heater rating plate
Branch circuit wire and fusing or circuit breaker of proper size
Electrical connections tight and unit properly grounded
Water Supply
Water heater completely filled with water BEFORE operating the unit
Air purged from water heater and piping
Water connections tight and free of leaks
Table 4 - Installation Checklist
Wiring Diagram for 18 and 27kW
all
are
L1
L2
L1
Unit Requires 8 - 10 AWG ground wire - one for each 240V circuit
Wiring Diagram for 36kW
L1
L2
L1
L2
L2
L1
L2
8/2 AWG
8/2 AWG
8/2 AWG
L1
L2
L1
L2
8/2 AWG
8/2 AWG
8/2 AWG
8/2 AWG
Unit Requires 8 - 10 AWG ground wire - one for each 240V circuit
Figure 7 - Water Heater Wiring Diagrams
11
Terminal Block in Unit
L1
L2
L1
L2
Terminal Block in Unit
L1 L2
L1 L2
L1 L2
Yes
Yes
Yes
Yes
EN
L1
L2
L1 L2
No
No
No
No