Shutdown; Draining The Unit - Process Technology Lufran LUF Series Manual

Operation (Continued):
Shutdown Procedure:
1) Press the HEATER OFF button on the main menu screen. Continue water flow through the heater to
allow the heating columns to cool down.
2) Continue water flow through the heater until the outlet temperature display indicates 95°F (35°C) or
less.
Le chauffe-eau doit être désactivé et le laisser
refroidir avant que le débit d'eau est coupée.
températures dangereuses et des conditions de
pression peuvent résulter de procédures d'arrêt
inappropriées.
3) Press the POWER OFF Button.
4) Turn off the MAIN SERVICE DISCONNECT to the unit (provided by customer).
5) Stop water flow through the unit. If the unit will be shut down will be for an extended period, open the
customer supplied drain located near the inlet plumbing connection to drain the water from the unit.
Once the unit is drained, dry the unit by blowing inert gas (N2 or CDA) through the piping system.

Draining the unit:

1) Close the customer installed service shutoff valves on the inlet and outlet of the unit. Apply any
necessary lockout/tagout device.
2) Position the customer supplied 3-way valve on the inlet of the unit to open the heating columns to a
non-pressurized drain.
3) Open the capped fitting of the customer supplied TEE fitting on the outlet of the unit. The heating
columns will start draining.
4) Optional: the customer may apply pressurized N
columns. Gas pressure must not exceed 1 Bar (14 PSI).
5) When the unit is finished draining, shut off the optional pressurized gas and close the fitting on the
TEE fitting.
6) Shut off the purge gas supply. Apply lockout/tagout devices as necessary.
M-43-25
Revision - Date 03-01-04-18
The heater must be disabled and allowed to cool
before the water flow is turned off.
temperatures and pressure conditions may result
from improper shutdown procedures.
or CDA gas to expedite the draining of the heating
2
42
LUF-Series Lufran Manual
Standard outlet, Standard Interface
Dangerous