Hubbell Electric Heater Company J - Manual (Page 8)

PRESSURE REDUCING VALVE
A bronze pressure reducing valve with built-in bypass is supplied with the
unit. This valve is shipped separately for in-line installation. The ¾” NPT
valve is adjustable from 25-psi to 75-psi. The inlet connection is supplied with
a ¾” union by sweat connection. The outlet connection is ¾” female NPT.
The set screw located at the top of the diaphragm adjusts the pressure, turn
clockwise to decrease the pressure and counter-clockwise to increase the
pressure. Pressure reducing valves for the J3 and J4 models are optional.
DIELECTRIC UNIONS
Dielectric unions are provided for the inlet and outlet nipples to isolate stray
ground currents to reduce the possibility of galvanic corrosion. (Optional on
the J3 and J4 Models).
OPTIONAL EQUIPMENT
Slide Brackets
8
Available for the J6 Model only, these brackets allow for mounting the booster heater under a
counter. See slide bracket diagram on page 9 for details.
Shock Absorber
The optional shock absorber can be installed between the booster
and the dishwasher to reduce the harmful pressures resulting from
quick closing dishwasher solenoid valves.
Legs
In lieu of the standard black plastic legs,
optional adjustable legs are available in
stainless steel, die-cast nickel plated, and
floor mount stainless steel. All optional
legs are adjustable height type. Floor Mount Nickel Plated Stainless Steel
Security Package
For prison and other secure facilities a tamper resistant package is available. All external screws
are spader type requiring a spader wrench for removal.
Alternate Voltage
Other voltages are available, including 277V single-phase, and 380V, 415V, and 440V three-
phase. Consult the factory for details.
Water Treatment System
The optional water treatment system provides superior mineral scale
prevention and corrosion control by feeding a special blend of scale
control compounds into the warm water stream before the heater. The
in-line system includes a clear cartridge housing to allow an operator to
view the cartridge and determine when it needs replacement without the
need to open the system.
XB1 Low Temperature Interlock
An optional in-line control board with separate manual setpoint (range: 165°F – 194°F)
monitors the temperature of the water through the P65 probe and will trip a SPDT relay for
customers’ remote applications.
Remote Alarm Plug Adapter
An optional plug adapter is available to provide a remote fault alarm
signal through the J4 connector on the control board. See page 12 for
installation details.
24-Volt Heater Interlock Adapter
An optional plug adapter is available to interlock the heater via a 24-volt
signal through the J1 connector on the control board. The 24-volt heater
interlock adapter is supplied standard on the J3 model. See page 13 for
installation details. (Only available with r23 or later software).