COOK ERV Fluid Coil Supplement User Manual
Erv fluid coil supplement, Installation, operation, and maintenance manual, Energy recovery ventilator
contact your local representative. Unauthorized repair to the coil
may void the coil’s warranty (see warranty policy on back cover).
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.
5.
All field piping must be self supporting. System piping should
be flexible enough to allow for thermal expansion and contraction of
the coil.
6.
General piping diagrams can be found in Figure 2 - Horizontal
Airflow.
Operation
Initial Start-Up
1.
Open all air
vents so that air is
eliminated from within
the coil circuitry and
headers. Verify that
all vents and drains
are not obstructed
and do discharge a
stream of water.
2.
Fill the coil with
water then close all
vents.
3.
Perform an initial hydrostatic leak test of all brazed, threaded
or flanged joints, valves and interconnecting piping. Recheck the
coil level and correct if necessary. When the setup is found to be
leak free, discharge and discard initial water charge. It is important
that all grease, oil, flux and sealing compounds present from the
installation be removed.
General
1.
Proper air distribution is vital to coil performance. Air flow any-
where on the coil face should not vary by more than 20%.
2.
The drain pan and associated piping (drain line and trap)
should be installed so that there is no standing water in the drain
pan and that no blow-through occurs.
3.
Fluid and air velocities should be maintained within recom-
mended values.
Maintenance
General
1.
Filters should be inspected on a regular basis and changed as
needed. Maintaining clean filters is a cost effective way to help
maintain maximum coil performance and service life.
ENERGY RECOVERY VENTILATOR
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains supplemental installation, opera-
tion and maintenance instructions for an ERV-with optional
fluid coil.
Carefully read this publication and the installation, opera-
tion, and maintenance instruction for standard units of the
ERV- Energy Recovery Ventilators publication prior to any
installation or maintenance procedure.
Loren Cook catalog,
ERV
, provides additional information
describing the equipment, fan performance, available accessories,
and specification data.
For additional safety information, refer to AMCA Publication
410-96,
Safety Practices for Users and Installers of Industrial and
Commercial Fans
.
All of the publications listed above can be obtained from Loren
Cook Company by phoning (417)869-6474, extension 166; by FAX
at (417)832-9431; or by e-mail at [email protected].
For information on special equipment, contact Loren Cook Com-
pany Customer Service Department at (417)869-6474.
Mounting
1. All water and glycol coils are designed to be fully drainable
when properly mounted.
2. Vertical air-flow is not recommended for dehumidifying coils.
Coil Types
Standard Fluid Coils
Type “M” coils are used for one and two row applications that
require same end connections. For type “M” coils the supply and
return headers are offset or
“splayed”. This orientation allows
for the supply and return headers
to be placed side by side.
Installation
1
. It is recommended that the
coils be cleaned with a commer-
cially available coil cleaner prior
to installation.
2
. Check the coil hand designation to insure that it matches the
system. Water and glycol coils are generally plumbed with the
supply connection located on the bottom of the leaving air-side of
the coil and the return connection at the top of the entering air-side
of the coil (Figure 1 - Coil Connection Diagram). This arrangement
provides counter flow heat exchange and positive coil drainage. If
a universal coil is supplied, cap off the two unused connections.
3.
Once installed, the coil should be pressurized to 100 psig
with dry nitrogen or other suitable gas. The coil should be left pres-
surized for a minimum of 10 minutes. If the coil holds the pressure,
the hook-up can be considered leak free. If the pressure drops by
5 psig or less re-pressurize the coil and wait another 10 minutes. If
the pressure drops again, there is more than likely one or more
small leaks which should be located and repaired. Pressure
losses greater than 5 psig would indicate a larger leak that should
be isolated and repaired. If the coil itself is found to be leaking,
ERV Fluid Coil Supplement
Y
X
Z
Horizontal Air Flow
Horizontal Tubes
Level with
the y-axis
and x-axis.
M Type
Return Bends
Splayed Header
W Type
> 2 Row
Air Vent
Gate Valve
Tee
Vent Plug
Re
tur
n
Air F
low
Su
p
p
ly
Dirt Leg
Cap
Union
Drain Plug
Figure 2 - Horizontal Airflow Diagram
Air
Air
Return
Supply
Figure 1 - Coil Connection Diagram
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