Danfoss iSave 21 Plus Service guide
Service guide
Energy Recovery Device
iSave 21 Plus
Disassembling and assembling
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Service guide | Disassembling and assembling iSave 21 Plus
Table of Contents
Contents
1. General Introduction........................................................................2
2. Disassembling the iSave ................................................................3
3. Disassembling the pressure exchanger ..................................................4
4. Assembling the pressure exchanger .....................................................7
5. Disassembling the vane pump .........................................................12
6. Assembling the vane pump ............................................................14
7. Assembling the iSave...................................................................17
8. Exploded view vane pump.............................................................18
9. Exploded view pressure exchanger ...............................................19
10. Exploded view iSave ...................................................................20
1. General Introduction
This document covers the instructions for
disassembling and assembling the iSave 21 Plus.
Important: It is essential that the iSave is
serviced in conditions of absolute cleanliness.
For a better understanding of the iSave, please see
the exploded views in the sections 8, 9 and 10.
The weight of the iSave is 47 kg / 103 lb
and it must be lifted with suitable lifting
equipment.
The weight of the pressure exchanger alone is
28 kg / 62 lb.
To prevent cold welding, lubricate threads of
screws with grease screw them into the component and tighten them by the hand. Use PTFE
lubrication type.
Tools needed for disassembling the iSave:
- iSave 21 Plus tool kit (180F4160)
- 2 screwdrivers
- Lock ring plier
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180R9400 | AX243586503155en-000301
Service guide | Disassembling and assembling iSave 21 Plus
2. Disassembling the
iSave
1. Place the iSave on a clean table.
3. Remove the vane pump.
2. Unscrew the bolts on the frontange.
(See above - bolts marked in red)
4. Use special tool to x the coupling in
place while loosing the coupling.
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Service guide | Disassembling and assembling iSave 21 Plus
3. Disassembling the
pressure exchanger
1. Unscrew the bolts in the ange.
3. Gently push out the ange.
2. Screw in the two M8 bolts.
4. Wet the shaft and shaft seal with clean
ltered water. Gently lever the shaft
assembly free using 2 screwdrivers/allen
keys..
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180R9400 | AX243586503155en-000301
5. Unscrew the bolts in the ange. 6. Gently remove the ange.
Note: Loose parts on the inside of the ange.
Service guide | Disassembling and assembling iSave 21 Plus
7. If bearing in ange need to be changed
gently press the bearing out from the
back side with a tube or a drift.
Place the new bearing in the hole in the
ange.
9. Gently remove the cylinder barrel.
8. Lubricate the new bearing with clean
ltered water. With use of a hand press
gently press the new bearing in place
until it is in line with the ange surface.
Do not use a hammer!
10. Unscrew the bolts in the ange.
11. Gently remove the housing.
Note: Loose parts on the inside of the
ange.
Pin
12. Remove port plate and pin.
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Service guide | Disassembling and assembling iSave 21 Plus
13. Remove the high-pressure bearing using
a lock ring plier.
15. Gently lift the valve plate assembly free
with the aid of the screwdrivers.
14. Remove the high-pressure bearing.
16. Gently remove both valve plates.
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17. Replace the O-rings and the back-up rings
on the valve plate.
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