MEDICA 7/15
Operator Manual
ELGA
Page 34
MEDICA 7/15 US Version 2
– 10/15
9. EMERGENCY BY-PASS LOOP
The
MEDICA
has a built in emergency by-pass. Operation of the
emergency
by-pass
is
only
recommended
under
extreme
circumstances (e.g. electrical failure). The life of consumables will be
reduced and it is recommended that the ion-exchange pack be
replaced before and after use of the emergency by-pass.
It is also recommended that the 0.2µm filter be replaced after the
emergency by-pass has been used.
Step 1 - Repair
1. CONTACT your local distributor or service
department to arrange repair of your
MEDICA.
2. CHECK that you have sufficient stock of
consumables to continue the production of
purified water.
(See step 4 for cartridge life
calculation).
Step 2 - Commissioning the Emergency By-pass
1. ENSURE the electrical power supply is switched
off.
2. ENSURE the inlet water supply is isolated.
3. WAIT several minutes to allow the residual
pressure in the inlet water supply to fall.
4. DISCONNECT the inlet tube and connect to the
emergency by-pass connection.
5. RELIEVE any residual pressure in the rest of the
system by slowly opening the bleed nipple on the
capsule filter until water flow ceases. Use an
absorbent cloth to soak up the water and re-
tighten the bleed nipple.
6. REPLACE ion-exchange cartridge pack (LC141).
(See Section 7.2).
7. DISCONNECT the analyzer feed tube from the
analyzer and re-direct to a suitable drain.
Step 3 - Re-establishing Supply
1. RE-ESTABLISH water supply and adjust the feed
pressure to 3 bar (45 psi).
CAUTION! Failure to adjust the water supply pressure to the
unit will result in damage to the consumables and
possible failure.
2. OPEN the front door and locate the emergency
by-pass valve installed on the feed to the UV
housing.
3. OPEN the valve.
4. ALLOW water to flow to drain for 2 minutes.
5. CLOSE the emergency by-pass valve.
6. RE-CONNECT the feed to the analyzer.
7. OPEN the emergency by-pass valve.
8. Slowly OPEN the upper bleed nipple on the
0.2µm capsule filter until water, free of bubbles,
flows out. Use an absorbent cloth to prevent
splashing of internal components.
9. The emergency by-pass is now operational.
Emergency
by-pass
connection
Emergency by-pass location
Emergency
by-pass valve
Emergency by-pass valve
