MEDICA-D 7/15 US
Operator Manual
ELGA
Page 36
MEDICA-D 7/15 US MANU40550 Version 2
– 05/17
8.3 Emergency by-Pass
The
MEDICA-D 7/15 US
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-D
7/15 US.
2. CHECK that you have sufficient stock of
consumables to continue the production of
purified water.
(See Step 4
– Calculate Ion-
Exchange Cartridge Life).
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. OPEN door and REMOVE two screws on
right-hand side of central chamber to free cover
of right-hand compartment. REMOVE cover.
5. DISCONNECT the inlet tube on the left-hand side
of the
MEDICA-D 7/15 US
and CONNECT to the
emergency by-pass connection below the black
valve in the right-hand compartment.
6. 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.
7. REPLACE ion-exchange cartridge pack (LC141)
(See Section 7.2).
8. OPEN the sanitization isolating valve (V
2
).
9. CLOSE the analyzer isolating valve (V
1
).
Step 3 - Re-establishing Supply
1. RE-ESTABLISH water supply and ADJUST the
feed pressure to 3bar (45psi).
CAUTION! Failure to adjust the water supply pressure to the
unit will result in damage to the consumables and
possible failure.
2. OPEN the black valve in the right-hand
compartment.
3. ALLOW water to flow to drain for 2 minutes.
4. CLOSE the emergency by-pass valve.
5. CLOSE the sanitization isolating valve (V
2
).
Sanitization Port
Emergency
by-pass valve
Emergency By-pass Valve
Location
