McQuay HI-F5 Manual

© 2008 McQuay International
Types HI-F5, E-F5
Installation and Maintenance Manual IM 900
McQuay Water Cooling, Heating, and High
Capacity Booster Coils
Group: Applied Air
Part Number: IM 900
Date: February 2008

Contents
Introduction .............................................................. 3
General Information................................................ 3
Hazard Identification Information............................ 3
Receiving Instructions ............................................ 3
Coil Types............................................................... 3
Standard Fluid Coils ........................................... 3
Nomenclature ......................................................... 3
Installation ................................................................ 4
Mounting................................................................. 4
Installation .............................................................. 4
Operation and Maintenance.................................... 5
Operation ............................................................... 5
Initial Start-Up .................................................... 5
General .............................................................. 5
Maintenance .......................................................... 5
General .............................................................. 5
Blowing-Out Coils............................................... 6
Freeze Protection Fittings .................................. 6
Flushing Coils..................................................... 7

McQuay IM 900 3
Introduction
Introduction
General Information
These are general guidelines for the installation, operation and
maintenance of McQuay water heating and high capacity
booster coils. They may have to be tailored to meet the specific
requirements of any one job. An experienced installation
company or fully trained personnel should perform the
installation and maintenance of any coil.
Hazard Identification Information
Receiving Instructions
1All McQuay fluid coils are factory tested at 315 psig
minimum air pressure while submersed in water, inspected,
and carefully packaged.
2Damage to the coils can occur after they have left the
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.
3Damaged and/or missing items should be noted on the
carrier’s freight bill and signed by the driver.
4For additional assistance, contact your local McQuay sales
representative.
Coil Types
Standard Fluid Coils
McQuay fluid coils are specifically designed for your
particular application. Flexibility is built into our
manufacturing processes, offering variations in fin type, fin
density, circuitry arrangement, coil casing, and materials of
construction.
Standard fluid type “W” coils utilize a collection header for
one and two row applications and return bends for applications
that require three or more rows.
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.
Booster coils, type “B,” are also available for one and two row
applications.
Figure 1: Coil Types
DANGER
Dangers indicate a hazardous situation which will result in
death or serious injury if not avoided.
WARNING
Warnings indicate potentially hazardous situations, which can
result in property damage, severe personal injury, or death if
not avoided.
CAUTION
Cautions indicate potentially hazardous situations, which can
result in personal injury or equipment damage if not avoided.

4McQuay IM 900
Introduction
Nomenclature
5 W S 14 06 C 24.00 x 144.00
Tube O.D.
3=3/8"
4=1/2"
5=5/8"
Coil Type
W Standard Water
M Splayed Headers
B Booster
Circuiting
Q - 1/4 serp M - 1 1/2 serp
H - 1/2 serp D - 2 serp
L - 3/4 serp S - 1 serp
B - 3" tube center
Booster
S - 1 circuit
D - 2 circuits
B - 3" tube centers
Finned Length (inches)
Finned Heigth (inches)
Fin Design
A - flat (AI, Cu)
B - E-F5 (AI, Cu)
C - HI-F5 (AI, Cu)
Rows Deep
Fins Per Inch

McQuay IM 900 5
Installation
Installation
Mounting
All McQuay water and glycol coils are designed to be fully
drainable when properly mounted. Vertical air-flow is not
recommended for dehumidifying coils.
Figure 2: Coil Mounts
Installation
If you are unsure about any portion of the installation, contact
your local steam specialist for assistance.
1Carefully remove the coil from the shipping package to
avoid damage to the finned surface area. Damaged fins can
be straightened using an appropriate fin comb.
2McQuay recommends cleaning the coil with a
commercially available coil cleaner prior to installation.
Refer to “Maintenance” on page 5 for cleaning
recommendations.
3Check 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. This arrangement
(Figure 2) provides counter flow heat exchange and
positive coil drainage. If a universal coil is supplied, cap off
the two unused connections.
Figure 3: Supply and Return Locations
4Standard coils must be mounted level to insure proper
drainage. Refer to “Mounting” on page 4 for leveling
requirements.
5Proper clearance should be maintained between the coil
and other structures such as the fan, filter racks, transition
areas, etc.
6Once installed, the coil should be pressurized to 100 psig
with dry nitrogen or other suitable gas. The coil should be
left pressurized 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, contact
your local McQuay sales representative.
Note: Unauthorized repair to the coil may void the coil's
warranty (see McQuay’s warranty policy on back
cover).
7All field brazing and welding should be performed using
high quality materials and an inert gas purge (like nitrogen)
to reduce oxidation of the internal surface of the coil.
8All field piping must be self-supporting. System piping
should be flexible enough to allow for thermal expansion
and contraction of the coil. Typical piping diagrams are
represented in Figure 4 and Figure 5.
Figure 4: Horizontal Air Flow
Figure 5: Vertical Air Flow
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.
Supply Gate
Valve
Return
Side Vent
Plug
Air Vent
Side Drain Plug
Air Flow
Union
Drain Valve
Cap
Dirt Leg
Tee

6McQuay IM 900
Operation and Maintenance
Operation and Maintenance
Operation
Initial Start-Up
1Open all air vents to eliminate air in the coil circuitry and
headers.
2Verify that all vents and drains are unobstructed and can
discharge a stream of water.
3Fill the coil with water an then close all vents.
4Perform 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 found present during
installation be removed.
General
1Proper air distribution is vital to coil performance. Airflow
anywhere on the coil face should not vary by more than
20%.
2The 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.
3Working pressure rating is 250 psig @ 300°F (standard)
4Fluid and air velocities should be maintained within
McQuay’s recommended values and for ARI certification.
Table 1: Fluid Velocities
Maintenance
General
1Filters 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.
2Periodic inspection of the coil for signs of corrosion and/or
leaks is recommended. Repair and replacement of the coil
and the connecting piping, valves, etc., should be
performed as needed by a qualified individual.
3Should the coil surface need cleaning, caution should be
exercised in selecting the cleaning solution as well as the
cleaning equipment. Improper selection can result in
damage to the coil and/or health hazards.
4Suggested cleaning instructions:
aWhen handling strong chemicals, be sure to wear
chemical impervious gloves, apron and splash goggles.
bActi-Brite (AB-1) is the recommended cleaning
solution. For more information, contact your local
McQuay Parts Distributor.
cDetermine required dilution for the specific application.
It is recommended to start with a dilution ratio of 10:1
and increase concentration until the desired results are
achieved.
dAs with mixing all acids, place the desired amount of
water into the tank and then add the chemicals.
eTurn off fans and allow hot coils to cool before
applying.
fUsing plain water, wet both the coil as well as the area
surrounding the equipment. Wetting the coil with water
aids in product penetration and performance.
gApply properly diluted product to coil surface.
Whenever possible, apply solution from the outlet side
of the coil. Allow solution to remain on surface,
normally 5-10 minutes. Do not allow solution to dry on
the coil.
Note: In extreme cases, application may have to be
repeated to achieve desired results.
hIf foaming does not occur, check for extreme grease
buildup which will slow the cleaning process. Foaming
may not occur if coil is coated or painted.
iRinse coils, tools, and surrounding area thoroughly after
the coil cleaning.
5Clean the coil from the leaving airside so that foreign
material will be washed out of the coil rather than pushed
further in.
6Maintain the circulated fluid free of sediment, corrosive
products, and biological contaminants. Periodic testing of
the fluid followed by any necessary corrective measures,
along with maintaining adequate fluid velocities and proper
filtering of the fluid, will help to satisfy this goal.
7If automatic air vents are not utilized, periodic venting of
the coil is recommended to remove accumulated air.
Fluid Velocity
Water 1 to 8 fps
Glycol 1 to 6 fps
DANGER
Follow the manufacturer’s guidelines for lockout/tagout and
disconnect all power to the unit before performing maintenance.
Contact with high voltage power will cause electrical shock,
resulting in severe personal injury or death.
WARNING
Moving parts, high pressure, and/or high temperature fluids can
cause serious personal injury.
CAUTION
Carefully read and follow the manufacturer's recommendations
before using any cleaning fluid.

McQuay IM 900 7
Operation and Maintenance
Blowing-Out Coils
1Isolate the coil from the rest of the system by closing the
valves on both the supply and return lines (see gate valves
in Figure 5 and Figure 6).
2Drain the coil by opening all drain valves and/or the drain
plug. Remove the vent plug to aid the draining process.
3Once the coil has been fully drained, the blower
compressed air can be hooked-up. Caps installed in the
piping on straight runs going to the supply and return
connections are ideal points to hook-up the blower. The air
vent and drain plug are not suitable locations for hooking
up the blower.
4Close the vent or drain plug on the header that the blower is
connected and open the drain valve or cap on the other
header.
5Operate the blower for 45 minutes and then check the coil
to see if it is dry. A mirror placed in the discharge will
become fogged if moisture is present. Repeat this
procedure until the coil is dry.
6Let the coil stand for several minutes then blow it out
again. If water comes out, repeat the blowout operation.
7Leave all plugs out and drains open until the threat of
freezing has passed.
Figure 6: Horizontal Air Flow
Figure 7: Vertical Air Flow
Freeze Protection Fittings
During the winter, chilled water coils need to be protected
against freezing. Factory installed and tested freeze protection
fittings are brazed onto water and steam coil headers, return
bends and tube stubs (as necessary) as part of the factory
assembly process. Freeze relief caps are then screwed onto
each fitting. All coils are leak tested at 315 psi air pressure
before shipping. The relief caps are designed to burst at 650
psig, relieving pressure before coil damage occurs. When
freeze damage occurs, simply unscrew the ruptured relief caps
and screw in replacement caps.
Figure 8: Freeze Protection Fittings
DANGER
The blower operator must take precautions to insure that water
does not come into contact with any of the electrical
components of the blower. Failure to do so will result in damage
to the equipment and serious injury.
Supply Gate
Valve
Return
Side Vent
Plug
Air Vent
Side Drain Plug
Air Flow
Union
Drain Valve
Cap
Dirt Leg
Tee

8McQuay IM 900
Operation and Maintenance
Flushing Coils
1McQuay recommends the use of inhibited glycol designed
for HVAC applications for corrosion protection. The use of
uninhibited glycol has produced formicary corrosion in
copper tubing. The complete filling of water coils with an
inhibited glycol solution for freeze protection can be
expensive. In some instances, it is more cost effective to
flush the coils with an appropriate concentration of
inhibited glycol solution. Residual fluid can be left in the
coil without the threat of freeze damage provided the
correct concentration of inhibited glycol was used. The
recovered fluid can then be used to flush other coils. Select
an inhibited glycol solution that will protect the coil from
the lowest possible temperatures that can occur at the
particular coil's locality.
2Estimate the volume of the coil in gallons. For 5/8" tubes
(1.5" face tube spacing) (finned height in inches) x (finned
length in inches) x (# of rows) x 0.0011 = gallons.
3Isolate the coil from the rest of the system by closing the
valves on both the supply and return lines (gate valves in
Figure 5 and Figure 6).
4Drain the coil by opening all drain valves and/or the drain
plug. Remove the vent plug to aid the draining process.
5Close the drain valve(s) and drain plug.
6Connect the flushing system to the coil. A typical system is
shown in Figure 9.
7With the throttling valve closed, start the pump and operate
until the air is vented from the coil. After venting, close the
air vent.
8Open the throttling valve about halfway and circulate the
fluid through the coil for 15 minutes. Check the strength of
the fluid. A hydrometer or test kit from the fluid
manufacturer is suitable for this application.
9Adjust the solution strength as needed and circulate the
fluid for another 15 minutes.
10 Repeat steps 8 and 9 until the desired concentration is
reached.
11 Shut the pump down and drain the inhibited glycol from the
coil.
12 The recaptured fluid can be used to flush other coils.
Note: Follow the manufactures' recommendations before
utilizing any glycol based antifreeze solution.
Additional fluid will be required for the pump,
connected piping, and fluid reservoir. Formulae are
for estimation purposes only.
Figure 9: Flushing System

© 2008 McQuay International • www.mcquay.com • 800-432-1342
McQuay Training and Development
Now that you have made an investment in modern, efficient McQuay equipment, its care should be a high priority.
For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or
call 540-248-9646 and ask for the Training Department.
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your
local McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date product
information, please go to www.mcquay.com.