ELGA
MEDICA-R 7/15 US
Operator Manual
MEDICA-R 7/15 US
Version 2
– 10/15
Page 41
9. EMERGENCY BY-PASS
The
MEDICA-R 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-R
7/15 US
.
2. CHECK that you have sufficient stock of
consumables to continue the production of
purified water
(see Step 4 for Ion-exchange
cartridge life calculation).
Step 2 - Commission 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 on the left-hand side
of the
MEDICA-R 7/15 US
and CONNECT to the
emergency by-pass connector above it.
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. OPEN the sanitization isolating valve (V
2
).
8. CLOSE the analyser isolating valve (V
1
).
Step 3 - Re-establish supply
1. RE-ESTABLISH water supply and ADJUST the
feed pressure to 3 bar (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 centre compartment
between the (LC140) Pre-treatment cartridge and
the UV Housing.
3. ALLOW water to flow to drain for 2 minutes.
4. CLOSE the emergency by-pass valve.
5. CLOSE the sanitisation isolating valve (V
2
).
6. OPEN the analyser isolating valve (V
1
).
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.
When the analyzer does not require water it is
Emergency by-pass location
Emergency by-pass valve
Emergency
by-pass
connection
Drain
Feed
water
