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PAGE 14
2472 DI HEATER OPERATION / MAINTENANCE MANUAL
If a large leak occurs, the heater is not capable of containing the
volume of liquid from a continuous flow. An adequate sized spill tray
and drain line may be required to allow time to shut off the heater in
the event of a leak.
Connect the cold DI supply line to the “Cold DI Inlet” connection.
NOTE:
The cold DI water supply line should have a readily accessible
inlet control valve capable of shutting off supply flow in case of any down-
stream plumbing leaks or system leaks.
Connect the hot DI process line to the “Hot DI Outlet” connection.
Use only hot DI compatible plumbing components. They must be
rated at a minimum of 110
C (230
F) and 60 psig (4.1 bar). The
outlet line should have a flow control valve to control DI water flow
rate.
The discharge line must be restricted to create adequate
backpressure (>30 psig) (running the system at low pressures will trip
the system pressure interlock).
NOTE:
It is recommended that the hot water supply line have a bleed, or
purge, at the point-of-use to reduce the possibility of stagnating the DI
water 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.
Recommendation: Either insulate the hot DI water process line or
place a Hot Surface hazard warning (like shown below) on the tubing
every 20 feet.
Connect the “Over Pressure Relief Drain” to an open drain line (do
not connect restrictive fittings or valves in line with the drain). If an
overpressure condition occurs in the heater, a burst fitting will rupture
to relieve pressure in the heater. The fitting must be replaced.
Attach cabinet drain line to bottom of cabinet. If a cabinet drain line is
not installed, the system will be difficult to drain for maintenance or
repair and can cause water damage if a large leak occurs.
