28
EN 5675-L
12�4 Coolant changing (PE3 - version with cooling jacket)
propylene glycol is frost resisting down to -15
A glycol change is only necessary:
•
• if the DI leakage sensor detects an ingress of water into the motor chamber or seal chamber.
• after repair work that requires draining of the glycol.
• if the pump is being taken out of service the glycol should be changed before storage.
•
pump is out of duty) the cooling liquid must be drained. Otherwise the pump may be damaged.
12.4.1 Instructionsonhowtodrainandllthecoolingsystem
1. Loosen the plug screw (a) or (b), enough to release any pressure that
may have built-up, and re-tighten.
Before doing so, place a cloth over the plug screw to contain any
possible spray of glycol as the pump de-pressurises.
2.
plug underneath.
Note:
underneath the drain plug by the completion of step 5, the waste
must be drained into a sump.
3. Remove the plug screw and seal ring (a) from the drain hole.
4. Glycol will drain from the cooling jacket chamber.
5.
horizontal. This will drain the remaining glycol from the seal
chamber.
Note: draining the glycol entirely with the pump in a horizontal
position would result in some glycol being retained in the cooling
jacket.
6. After the glycol is fully drained raise the pump into its upright position
7.
8. Select the required volume of glycol from the quantities table (p.29)
(a) Drain (b) Fill
9.
DRAIN FILL
(a)
(b)
2.
5.
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