Daikin SEHVX20BAW, Installation And Operation Manual

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5 Installation
Installation and operation manual
14
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-1C – 2018.04
A
A
B
C
D
a
b
a
c
d
25
150
90
a Gas side accessory pipe
b Cut here
c Gas side piping (field supply)
d Unit base
Outdoor
unit A B C D
SERHQ020 156 23 192 247
SERHQ032 150 29 192 251
NOTICE
▪ When connecting the piping on site, be sure to use the
accessory piping.
▪ Make sure the onsite piping does not come into contact
with other piping, the bottom frame or side panels of
the unit.
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
WARNING
Never remove the pinched piping by brazing.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
1 Remove the valve lid and make sure that the stop valves are
fully closed.
2 Connect a charge hose to service ports of all stop valves.
3 Recover gas and oil from the pinched piping by using a
recovery unit.
CAUTION
Do not vent gases into the atmosphere.
4 When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports.
5 If the pinched piping lower part looks like detail A in the figure
below, perform the last 2 steps of this procedure.
6 If the pinched piping lower part looks like detail B in the figure
below, perform the last 3 steps of this procedure.
7 Cut off the lower part of the smaller pinched piping with an
appropriate tool (e.g. a pipe cutter, a pair of nippers, …) so that
a cross-section is open, allowing remaining oil to drip out in
case the recovery was not complete. Wait until all oil has
dripped out.
8 Cut the pinched piping off with a pipe cutter just above the
brazing point or just above the marking if there is no brazing
point.
9 Wait until all oil is dripped out in case the recovery was not
complete, and only then proceed with connection of the field
piping.
a
b
c
b
c
B
A
a Service port
b Stop valve
c Point of pipe cutting just above brazing point or above
marking
A+B Pinched piping
5.4.3 To connect the refrigerant piping to the
indoor unit
▪ For the 32BAW, remove the top knockout hole in the
side service plate and add the grommet (accessory) to cover any
burrs. For the 64BAW, remove both top and bottom
knockout holes in the side service plate and add the grommets
(accessory) to cover any burrs.
a
b
a Knockout hole
b Grommet