Hubbell Electric Heater Company E - Manual (Page 7)

7
OUTER SHELL AND INSULATION
The tank is encapsulated in 2-inch thick polyurethane foam insulation. The insulation is protected by a
high impact non-corroding colorized composite protective jacket.
OPTIONS
The following optional features may be included in your water heater. Reference included drawing
specific to your heater for further details.
Low Water Cut-Off
Used as a safety device, the electronic low water cut-off is used to detect a low water situation and
disengage the operating coils in the magnetic contactor(s). Once the condition is remedied, the low
water cut-off switch is automatically reset.
Dial Temperature and Pressure Gauge
A combination temperature (70° - 250° F) and pressure (0 – 200 psi) gauge with 2½-inch dial may be
supplied for in-line installation (shipped loose) or factory installed in the tank.
Vacuum Relief Valve
A vacuum relief valve may be provided with the unit to reduce the risk of back siphonage and back
pressure of the system. The valve will be shipped loose for in-line installation. Instructions for
installation are provided with the valve.
Horizontal Constructions
The unit can be designed for horizontal installation, either ceiling hung or base mounted.
Building Management System (BMS)
A Building Management System control package may be supplied for remote operation and alarm
capabilities.
Electro-Mechanical Timer
An electro-mechanical 7-day time clock with battery back-up may be supplied for specific timing
operations. A set of instructions will be supplied with the timer.