Cook ERV Fluid Coil Supplement User Manual download pdf

contact your local representative. Unauthorized repair to the coil

may void the coil’s warranty (see warranty policy on back cover).

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.

All ﬁeld piping must be self supporting. System piping should

be ﬂexible enough to allow for thermal expansion and contraction of

the coil.

General piping diagrams can be found in Figure 2 - Horizontal

Airﬂow.

Operation

Initial Start-Up

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.

Fill the coil with

water then close all

vents.

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

Proper air distribution is vital to coil performance. Air ﬂow any-

where on the coil face should not vary by more than 20%.

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.

Fluid and air velocities should be maintained within recom-

mended values.

Maintenance

General

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

. It is recommended that the

coils be cleaned with a commer-

cially available coil cleaner prior

to installation.

. 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.

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

Horizontal Air Flow

Horizontal Tubes

Level with

the y-axis

and x-axis.

M Type

Return Bends Splayed Heade

W Type

> 2 Row

Air Vent

Gate Valve

Te e

Vent Plug

Supply

Dirt Leg

Cap

Union

Drain Plug

Figure 2 - Horizontal Airflow Diagram

Air Ai

Return

Supply

Figure 1 - Coil Connection Diagram

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locylGspf6ot1

yticoleVriA

slioCgnilooC

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mpf055-002:ecafruSteW

slioCgnitaeHmpf0051-002

1 2

ERV Fluid Coil Supplement 1

Summary of Contents

Page 1 - ERV Fluid Coil Supplement

contact your local representative. Unauthorized repair to the coilmay void the coil’s warranty (see warranty policy on back cover). 4. All ﬁeld braz

Page 2

2 maintain maximum coil performance and service life. 2. Periodic inspection of the coil for signs of corrosion and/orleaks is recommended. Repair

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Cook ERV Fluid Coil Supplement User Manual

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