| 98 |
7 Cleaning, descaling and disinfection
| HCU 40 |
Instructions for Use | 1.0 | EN | 01
Copyright Maquet Cardiopulmonary GmbH
Descaling
1
Fill the HCU 40 with sterile filtered water
up to the second mark on the water level
indicator.
2
Touch the
[Next]
symbol.
3
Put on protective clothing.
4
Produce a citric acid solution:
For descaling (every 3 months) with the HCU 40 standard tube (4 x 6 m in
length for the patient water circuit and 2 x 6 m for the cardioplegia water
circuit):
Use a powder funnel to put 640 g of citric acid into a chemical-resistant 10
liter canister with watertight lid. Add 5 liters of sterile, filtered, warm water
(approx. +35°C). Close the canister, check that it is leak-tight and dissolve the
citric acid by shaking.
If longer or shorter tubes are connected to the HCU 40 establish the correct
amount of citric acid for the required solution concentration of 2% (⇨ "Solution
Concentration with Different Tube Lengths", page 141).
5
Put the following quantities of the citric
acid solution into the three tank
chambers:
1.4 l to the cardioplegia water circuit (
[1]
),
1.8 l to the patient water circuit 2 (
[2]
),
1.8 l to the patient water circuit 1 (
[3]
),
(valid for the standard tube (4 x 6 m in
length for the patient water circuit and 2
x 6 m for the cardioplegia water circuit)).
Fill the remaining solution in the canister
in equal parts into the three tank
chambers.
6
Touch the
[Next]
symbol.
7
Fill the HCU 40 up to the white mark in the tank with sterile filtered water (1
cm above the cooling plates).
▶
The water level is shown on the 4th
marking
8
Touch the
[Next]
symbol.
Summary of Contents for HCU 40
Page 1: ...INSTRUCTIONS FOR USE HEATER COOLER UNIT HCU 40...
Page 147: ......
