21
ENGLISH
Piping work
Water connections must be made in accordance with the outlook diagram delivered with the unit, respecting the water
in- and outlet. If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into account the
following when connecting the water circuit:
f
f
Use clean pipes only.
f
f
Hold the pipe end downwards when removing burrs.
f
f
Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
f
f
Use a good thread sealant for the sealing of the connections.
The sealing must be able to withstand the pressures and temperatures of the system.
f
f
When using non-brass metallic piping, make sure to insulate both materials from each other
to prevent galvanic corrosion.
f
f
Because brass is a soft material, use appropriate tooling for connecting the water circuit.
Inappropriate tooling will cause damage to the pipes.
•
Be careful not to deform the unit piping by using excessive force when connecting the piping. Deformation of
the piping can cause the unit to malfunction.
•
Always use two wrenches (spanners) for tightening or loosening the water connections, and tighten
connections with a torque wrench as specified in below table. If not, connections and parts can be damaged
and leaks.
•
The unit is only to be used in a closed water system. If applications are in open water circuit, it will generate Heat
exchangers fouling, Corrosion, Leak.
CAUTION
Name
Tightening torque
1
BSPP1
350~380 kgf•cm
34 ~ 37 N•m
2
Flow switch
72~82 kgf•cm
7 ~ 8 N•m
Flushing and air-purging
When filling water, the following start-up procedure should be followed.
1. All system components and pipes must be tested for the presence of leaks.
2. Preparation of a make-up water assembly or flushing unit is recommended for installation
and service.
3. Before connecting pipes to the Outdoor Unit, flush water pipes clean to remove
contaminants during hours using a flushing unit or tap water pressure if it is adequate (at
2 to 3 bar)
4. Fill water into the Outdoor Unit by opening shut-off & drain valve.
5. Purge the air. (Fill with a flushing unit with sufficient capacity: avoid aerating the water)
6. Circulate for long enough to ensure that all air has been bled from the complete water
piping system.
•
After installations, commissioning should be performed by qualified
representatives. Unless flushing and air-purging works are performed
adequately, it might result in malfunctions.
CAUTION
Flushing unit
(or purging cart)
EHS MONO_ODU_IM_05387A-01_BOOK.indb 21
2015-06-25 오후 4:40:21
