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QUANTUM NXT DI HEATER OPERATION / MAINTENANCE MANUAL
3.3 HOOK-UP
3.3.a Facilities
All utility hook-ups associated with the DI water heater are easily
accessible and are referenced in the Appendix.
After positioning heater at operating location, adjust the four leveling
feet until the heater is level and stable.
DI Supply:
Connect the DI supply line to the “Cold DI Inlet” connection.
DI Outlet:
Connect the hot DI process lines to the “Hot DI Outlet” connection. Use
only hot DI compatible plumbing components which must be rated at a
minimum of 110°C (230°F) and 414kPa (60 psig).
Recommendation: Either insulate the hot DI water process line or place
a Hot Surface hazard warning (example shown below) on the tubing
every 20 feet. Conform to local codes while evaluating hot water line
routing.
Drain
Connect the “Over-Pressure Relief Drain” to an open drain line with no
more than 30’ of ¾” tubing. Do not connect restrictive fittings or valves in
line with the drain. If an over-pressure condition occurs in the heater, a
valve will relieve pressure in the heater.
Attach drain line to bottom of the cabinet. If a cabinet drain line is not
installed, any leak inside the cabinet will leak out of the drain fitting.
NOTE:
The DI hot water line should have a bleed, or purge, at the point-
of-use to reduce the possibility of the DI water becoming stagnated in the
heaters when not in use. The amount of this bleed is best evaluated on a
case-by-case basis, taking into account each user’s criteria and
production standards.
Caution
Hot Surface
Do not touch. Can cause
skin burns upon contact.
Disconnect and lockout
power and allow surface to
cool before servicing.
