Installation; Mounting - McQuay HI-F5 Installation And Maintenance Manual

Mounting

Installation

Steam coils must be properly mounted for condensate removal.
This will aid in preventing destructive water hammer, keeping
coils from freezing and preventing corrosive elements from
collecting in the tubes. Case-pitched coils (Figure 2) should be
installed level. McQuay models SA, SB, HA, JA, GA, DA,
LA, RA and TA come standard pitched in the casing.
Coils that are un-pitched (Figure 3) must be installed with the
tubes pitched towards the return connection. A minimum pitch
of 1/8" per foot of coil length is required (pitch has been
exaggerated in Figure 3). Coils with opposite end connections
(RA, TA, SA, & HA) should be furnished with an expansion
joint or provisions made for expansion on opposite connection
end.
Figure 2: Case Pitched
Figure 3: Case Unpitched
McQuay IM 901
Installation
Steam, even at low pressure, can cause serious bodily injury
that may result in death. Be sure the system is off or the
components are isolated before beginning work..
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.
Failure to properly install the coil can result in irreparable
damage to the coil as well as other components in the system.
If you are unsure about any portion of the installation, contact
your local steam specialist for assistance.
Carefully remove the coil from the shipping package to
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avoid damage to the finned surface area. Damaged fins can
be straightened using an appropriate fin comb.
McQuay recommends cleaning the coil with a
2
commercially available coil cleaner prior to installation.
Refer to "Operation and Maintenance" on page 8 for
cleaning recommendations.
Note: Vacuum breakers and air vents should be piped to a
drain or other suitable location where discharged
steam cannot lead to personal injury.
Mount coil properly to provide positive condensate
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drainage. Refer to "Mounting" on this page.
Proper clearance should be maintained between the coil
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and other structures such as the fan, filter racks, transition
areas, etc.
Utilize vacuum breakers on each coil. Steam traps require a
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positive pressure differential to force the condensate
through the valve seat. If the coil's pressure drops below
atmospheric, the pressure differential across the valve will
be negative and the condensate will not drain. This
condition can lead to serious damage or failure of the coil
due to freezing, water hammer and corrosion. Refer to
Figure 4 and Figure 5 for recommended placement.
Installation
WARNING
CAUTION
CAUTION
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