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Introduction
General Information
Guidelines for the installation, operation and maintenance of
Daikin direct expansion (DX) cooling coils have been
provided to help insure proper performance of the coils and
their longevity. These are general guidelines that may have
to be tailored to meet the specific requirements of any one
job. As always, an experienced installation company or fully
trained individual should perform the installation and
maintenance of any coil. Protective equipment such as safety
glasses, steel toe boots and gloves are recommended during
the installation and routine maintenance of the coil.
Hazard Identification Information
Dangers indicate a hazardous situation which will result in
death or serious injury if not avoided.
Warnings indicate potentially hazardous situations, which can
result in property damage, severe personal injury, or death if
not avoided.
Cautions indicate potentially hazardous situations, which can
result in personal injury or equipment damage if not avoided.
Receiving Instructions
All Daikin coils are factory tested at 315 psig minimum
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air pressure while submersed in water, inspected, and
carefully packaged.
Damage to the coils can occur after they have left the
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factory. Therefore, the coils should be inspected for
shipping damage upon receipt. The freight bill should also
be checked against items received for complete delivery.
Figure 1: Evaporator Coil Types
EN
Normal
Rows 2, 3, 4, 5
6, 8, 10, 12
Daikin IM 902
DANGER
WARNING
CAUTION
EF
Face Control
Rows 2, 3, 4, 5
6, 8, 10, 12
Damaged and/or missing items should be noted on the
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carrier's freight bill and signed by the driver.
For additional assistance, contact your local Daikin sales
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representative.
Coil Types
Model EN
This evaporator coil is used for applications where capacity
control is not required. Single or multiple distributors are
available depending on the number of circuits required. Model
EN (Figure 1) evaporators utilize dual suction connections
when multiple distributors are used.
Model EF
Face control (model EF - Figure 1) is another evaporator coil
option offered. Face control is the simplest form of capacity
control. These coils are normally furnished with two
distributors and two suction connections offering 50% capacity
reduction capabilities.
Model ER
Daikin offers a row control option (model ER - Figure 1) for
six row evaporator coils. These coils are split into two rows
and four rows that offer approximately a 50% capacity
reduction.
Model EJ
These evaporator coils (model EJ - Figure 1) come with
interlaced circuiting. This form of capacity control utilizes two
distributors with each feeding every other tube in the first row
of the coil. Each distributor has a separate suction connection.
Model EK
For applications that require face control and interlaced
circuits, we offer evaporator model EK (Figure 1). Interlaced
face control utilizes four distributors and four suction
connections.
ER
Row Control
Rows 6
2 Distributors
Introduction
EJ
Interlaced
Rows 3, 4, 6, 8
Face Control
2 Distributors
4 Distributors
EK
Interlaced
Rows 4, 8
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