Hubbell Electric Heater Company D - Manual (Page 8)

8
Individually Fused Elements
To prevent the possibility of damage to control circuits and other elements in case of electrical
overloads, fuses may be supplied for each circuit. Two types of fuses may be used; a type NON for
voltages less than 250-volt or type JJS for voltage less than 600-volt.
Type JJS Type NON
Digital Display
A 1/16 DIN electronic temperature control package may
be installed. A separate manufacturer’s operating
manual will be supplied with the unit.
Stainless Steel Pressure-Only Relief Valve
Optionally, a ¾” NPT, type 316 stainless steel pressure-only relief valve may be supplied, as shown
below.