Daikin
IM 902
5
Installation
Installation
Mounting
Position the coil such that the suction header is at the entering
airside of the coil and the distributor tubes are at the leaving
airside of the coil. This orientation provides counter flow heat
exchange that is required for proper coil performance.
The suction connection is located at the bottom of the coil
when properly installed (see Figure 1 on page 3).
Installation
If you are unsure about any portion of the installation, contact
your local steam specialist for assistance
.
1
Carefully remove the coil from the shipping package to
avoid damage to the finned area. Damaged fins can be
straightened using an appropriate fin comb.
2
Proper clearance should be maintained between the coil
and other structures such as the fan, filter racks, transition
areas, etc.
3
Inspect the refrigerant distributor and verify that the nozzle
is in place. The nozzle is generally held in place by a
retaining ring or it is an integral part of the distributor itself
(Figure 2). If a hot gas bypass kit was ordered with the coil,
the nozzle that is in the distributor will need to be relocated
into the hot gas bypass assembly (Figure 3).
4
All field brazing and welding should be performed using
high quality materials and an inert gas purge (such as
nitrogen) to reduce oxidation of the internal surface of the
coil.
Figure 2: Distributor
Figure 3: Hot Gas Bypass Kit
5
If a hot gas bypass kit was ordered with the coil, install it
now (refer to Figure 4 for a general installation diagram).
Complete installation instructions are in the box that
contains the hot gas bypass kit. Align the side port with the
hot gas line prior to brazing into place (Figure 4).
Figure 4: Hot Gas Bypass Kit Installed
CAUTION
Sharp edges on sheet metal and fasteners can cause
personal injury.
This equipment must be installed, operated,
and serviced only by an experienced installation company and
fully trained personnel.
Protective equipment such as safety glasses, steel toe boots
and gloves are recommended during the installation and
routine maintenance of the coil.
CAUTION
Failure to properly install the coil can result in irreparable
damage to the coil as well as other components in the system.
Retainer
Ring
Nozzle
Distributor
Coil
Suction Header
Distributor
Equalizer Line
Nozzle
Liquid Line
Expansion Valve
Suction Line
Remote Sensing Bulb
Straps
Suction Connection
Hot Gas By-Pass
Hot Gas Side Port
