Daikin GYEQ20AN Service Manual page 234

Maintenance
10
Inspecting and replacing the cooling water hose
Part name Cooling water hose
Tools/materials Slotted screwdriver, waste cloth, pliers, pinch tool
Step
(1) See "Basics" (page 213)
(2) Inspect the cooling
water rubber hoses
(3) Replace the cooling
water hose
(Install a new hose)
How to fix water leaks from a hose clip portion
When inspecting a system that uses hose clips, you may find, and need to fix, water leaks from a hose where it is fastened with a
hose clip.
If this is the case, fix water leaks by going through the following levels:
[Level 1]
Reattach the hose clip to
the correct position.
[Level 2]
Install an additional hose
band.
[Level 3]
Dispose of the hose clip,
and install a hose band
instead.
223
1. Check each hose for defects such as cracks or breaks while bending
it.
2. Check the hose clip portions of each hose for water leaks.
1. Set the hose bands onto each hose in advance.
2. Perfectly insert the hose into the joint in such a manner that the clip
position can be identified.
3. Set each hose clip at the correct position.
1. Water is likely to leak if the hose clip is not installed at a
right angle to the hose.
2. Water is likely to leak if the hose clip is installed too deeply.
The hose clip should be installed to a portion of the hose
where its outside diameter is larger than other portions.
(Dimension of portion b: approximately 5 mm)
If performing the action in level 1 fails to fix the leaks, add an additional hose band.
The hose band should be installed by fully loosening the worm
(threaded) portion, rather than by pulling out the hose.
If the action in level 2 cannot be performed due to space
restrictions, move the hose clip to the hose side and install a hose
band instead.
Task
SiAUY361411EA
Remarks
• Use this method to
check each hose at
portions where it can be
bent.
• Visually check each
hose (without bending
it) at portions where it
cannot be bent.
• Keep away from
surrounding protrusions
or edges.
• Drain the cooling water
or pinch the upstream
and downstream hoses
with pinch tools.
a b
Hose band
Hose clip
Hose band
Maintenance / Service Data