LJ Wing MV User manual

IOMVIFB-8
4830 TRANSPORT DRIVE, DALLAS TX 75247
TEL.: [phone]
www.ljwing.com
WARNING: Improper installation, adjustment, alteration, service or maintenance
can cause property damage, injury or death. Read the installation, operating and
maintenance instructions thoroughly before installing or servicing this equipment.
INSTALLER'S RESPONSIBILITY
Installer Please Note: This equipment has been test red and inspected. It has been shipped
free from defects from our factory. However, during shipment and installation, problems such as
loose wires, leaks or loose fasteners may occur. It is the installer’s responsibility to inspect
and correct any problems that may be found.
ATTENTION: READ CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
EQUIPMENT. RETAIN FOR FUTURE REFERENCE.
POST AND MAINTAIN THESE INSTRUCTIONS IN LEGIBLE CONDITION.
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
VERTICAL TUBE HEATING COILS
MV & VIFB MODELS
SAVE THIS MANUAL
ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR
STEAM OR HOT WATER REQUIREMENTS AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN
THAT THESE AGREE WITH THOSE AT POINT OF INSTALLATION. RECORD THE UNIT MODEL AND SE-
RIAL No.(s) IN THE SPACE PROVIDED. RETAIN FOR FUTURE REFERENCE. THE APPLIANCE IS NOT
TO BE USED BY PERSONS (INCLUDING CHILDREN) WITH REDUCED PHYSICAL, SENSORY OR MEN-
TAL CAPABILITIES, OR LACK OF EXPERIENCE AND KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN
SUPERVISION OR INSTRUCTION. CHILDREN SHOULD BE SUPERVISED TO ENSURE THAT THEY DO
NOT PLAY WITH THE APPLIANCE.
WING Model No. Serial No.
Wing MV & VIFB coil performance
is certied by the Air-Conditioning,
Heating, and Refrigeration Institute
(AHRI) under AHRI Standard 410
for maximum working pressures
up to 200 PSIG and temperatures
up to 400° F.
Wing MV & VIFB coils are listed
by Engineering Test Laboratories
(ETL) to Underwriter Laboratories
(UL) Standard 1995. This
standard assures that Wing coils
are safe to operate up to a design
pressure of 100 PSIG.

– 2 –
SECTION I - FOREWORD
As is the case with any ne piece of equipment, care
must be taken to provide the proper attention to the
operation and maintenance details of this machine.
This manual of instructions has been prepared to help
you become well-acquainted with those details, and in
doing so, you will be able to give your Wing Heating
Coil the care and attention any piece of equipment
needs and deserves.
ETL Coil Operating Parameters:
Maximum elevation is 9,000 ft. (2,743.2m).
Maximum operating temperature is 250°F (121.1°C).
Minimum operating temperature is 0°F (-17.8°C).
Maximum operating pressure is 100 PSIG (689 kPa).
Minimum operating pressure is 2 PSIG (13.8 kPa).
Table of Contents
Section I: Foreword and Table of Contents ................ 2
Section II: General Information ................................2-3
Section III: Installation and Mounting Procedure .....3-4
Section IV: Ductwork and Transitions ......................... 5
Section V: Equipment Photos...................................6-7
Section VI: Parts Drawing.........................................8-9
Section VII: Piping ...............................................10-17
Section VIII: Control Installation and Adjustment ....18-20
Section IX: Start Up .................................................. 21
Section X: Shut Down ...............................................22
Section XI: Maintenance............................................22
SECTION II - GENERAL INFORMATION
PURPOSE
The purpose of this manual is to present a guide for
proper installation, maintenance, and operation of
the Wing Heating Coil, and supplement, but not to
replace, the services of qualied eld service personnel
to supervise the initial start-up and adjustment of the
unit. Persons without previous experience with large
commercial and industrial heating equipment should not
attempt the initial adjustment and checkout procedure
which is essential before such installations may be
considered ready for operation. This manual should be
made readily available to all operating personnel as an
aid in troubleshooting and proper maintenance.
SHIPPING
Base Wing coils are shipped completely assembled.
Other large options or accessories are assembled
and shipped mounted and wired whenever possible
within limitations of shipping and handling. Any optional
accessories shipped separately are shipped as
assembled sections. Any wired accessories which have
been disassembled for separate shipment require no
additional conduit or wire for eld reassembly. All wire
leads will be tagged for ease of reconnection in the eld.
Shipments are made F.O.B. Dallas, Texas. The unit
is securely strapped, tied, and blocked to prevent
shipping damage. All shipments are checked by an
inspector before they are accepted by the carrier.
Parts that are shipped unmounted are noted on the bill
of lading. These parts, where feasible, are packaged
and shipped with the units. Upon receipt of shipment,
all units should be checked against the bill of lading to
insure all items have been received. All equipment
(and any optional accessories) should be checked
carefully for physical damage in the presence of
the carrier’s representative. If parts are missing
or damage has occurred, a claim should be led
immediately with the carrier.
RECEIVING
All coils are crated at the factory for safe shipment.
Check the unit carefully, and if damage has occurred,
report it at once to the carrier. All claims must be made
within 5 days of receipt of shipment. Upon receiving,
inspect the following for damage:
1. Damper linkage
2. Damper motors and control linkage
3. Finned tubes and dampers
4. Casing, for distortion
5. Header pipe connections
6. Duct attachment anges
Check the unit nameplate to insure size is correct as
ordered.
If system tags have been used, check that proper size
units have been tagged for correct system. (Wing will
tag units for specic systems upon request.)
All Wing coils are given a complete operations test
and control circuit checkout before shipment. A copy of
the wiring diagram and bill of material is included with
each unit shipped. If correspondence with the factory
is necessary, please provide the unit model and serial
number.
LIFTING AND HANDLING
Two angle lifting eyes are provided on the upper
casing anges on the Wing coil for lifting with overhead
cranes. If a single chain lift is used, a “Tee” section
spreader bar must be used to produce a vertical lift to
prevent bending of casing anges. Do not wrap chain
or cable around upper header to lift unit.
All Wing coils are shipped bolted onto a wood skid so they
can be handled by fork lift. Forks can be inserted under
the wood skid for lifting and on site handling. Do not lift
coil by inserting forks under bottom header of coil.

– 3 –
CAUTION - COIL MAY BE UNSTABLE ON FORKS
AND SHOULD BE SECURED FROM TIPPING BY
ATTACHING CABLES OR CHAINS FROM TOP OF
UNIT TO VERTICAL TRACKS OF FORK LIFT.
E. Optional Factory Service
Periodic service on any piece of mechanical
equipment is necessary for efcient operation. L.J.
Wing has a nationwide service organization available
to provide quick and dependable servicing of heating
coils. Wing also offers factory start-up service which
includes the presence of a service engineer to
supervise the initial start-up and adjustment of the
equipment and provide instructions for the owner’s
maintenance personnel in proper operations and
maintenance. Consult factory for quotations on
periodic or start-up service.
SECTION III - INSTALLATION AND MOUNTING PROCEDURE
A. The Wing Coil must be installed with the tubes
vertical for proper drainage. The coils are designed
for vertical mounting only (horizontal air ow).
B. At least 6" clearance should be provided above
and below coil for access to tubes and headers in
the event that future tube replacement or repairs are
necessary. 6" clearance should also be provided on
the damper motor and control linkage side of the coil
for service access.
C. The coils can be supported on the integral mounting
ange or on angle iron legs attached to the duct mounting
anges. Additional supports may be required in the
center for long coils.
D. The Wing coil must be installed with headers
level for proper condensate drainage. To insure
proper leveling, use a spirit level. Do not level by
measurement only.
E. Return steam condensate or hot water header
is securely bolted to the lower mounting bracket to
prevent damage to the header and tubes during
shipment. (See Figure 1.) Shipping bolts must be
removed before applying steam or hot water, but
after all piping connections are made. Failure to do
so will void factory warranty.
Figure 1 - Shipping Bolt Locations (C-000703)
F. Remove shipping braces before attaching
ductwork.
G. Ductwork can be attached to the coil anges or the
coil can stand in a duct with bulkhead plates blanking
off spaces around the coil. The anges must not be
used to support the ductwork.
COIL INSTALLATION AND LOCATION
1. Sheet metal isolation plates should be installed
on the top and bottom of the coil to eliminate
air ow over the supply and return headers, top
and bottom headers should be insulated and/or
isolated on both sides of the coil.
2. Cooling coils should be located downstream at a
distance no less than 36 inches from the outlet
ange of the coil. Freezestat location should also
follow this same guideline. Coils operating in VAV
systems, or those operating at lower or higher than
recommended air velocities, should be tted with
anti-stratication bafes.
3. The installation of humidiers with steam
manifolds internal of an air handler may provide a
temperature override to the system. Internal steam
manifolds and piping should be insulated.
TEMPERATURE CONTROL
1. The airstream thermostat control to the coils
should be located a minimum of 36” downstream.
Each coil should have its own temperature control
system.
2. Freezestats mounted on the face of the cooling
coils should be located a minimum of 36”
downstream of the coil ange. Optional anti-
stratication bafes are available to reduce this
spacing to 24”.
3. Coils operating at lower or higher than
recommended air velocities or in VAV systems
should be tted with optional anti-stratication
bafes.

– 4 –
STEAM/HOT WATER COILS
1. Steam pipes must be sized to handle desired steam
ows at the lowest pressures.
2. Inlet and outlet steam and hot water lines should be
fully insulated.
3. Full steam pressure must be supplied at all
times – modulating valves must not be used.
A modulating steam valve on a preheat coil can
actually cause the coil to retain the condensate due
to a reduced pressure in the coil, thus exposing
condensate in the tubes to freezing conditions. With
modulating steam below 5 psig (near valve closure)
the steam may not be fully distributed in all of the
tubes in the coil, causing the outer tubes to cool
abnormally. This will create thermal stress that can
lead to possible “outer tube failure”. Slow-acting on/
off steam valves may be used to close at desired set
points. The minimum open to closed and closed to
open time is three (3) minutes. Any time faster than
three minutes is considered fast acting and is not
allowed. If motorized steam valves are employed,
they should be of the normally open type so that if the
actuator fails, the valve will go to the open position,
thereby keeping the steam supply to the coil.
4. To isolate the coils in the off-season, slow acting on/
off steam valves may be used. If motorized steam
valves are employed, they should be of the normally
open type so if the actuator fails, the valve will go to
the open position.
5. The amount that the delivered air temperature
exceeds the thermostat setting is called temperature
override. To minimize temperature override:
(a) Insulate the top and bottom headers and/or at
least isolate them on both sides of the coils.
Eliminate airow over the supply and return
headers by installing sheet metal isolation plates
on the top and bottom upstream of the coils.
(b) Inlet and outlet mains should be fully insulated.
(c) To eliminate coil temperature override, use slow –
acting on/off valves to close at desired set points.
(d) The installation of humidiers with steam
manifolds internal of an air handler may provide
a temperature override to the system. Internal
steam manifolds and piping should be insulated.
6. Return steam condensate headers and hot water
supply headers must be free to oat. A exible
connector MUST be installed parallel to the coil
header, as close as possible to the coil connection
and be able to provide a minimum of 3/8" free vertical
and lateral movement of the headers.
7. Failure to install exible connectors will restrict
expansion of the headers. This can result in bowing
of tubes, bending of ns, interference with damper
operation, or eventually tube breakage.
8. Steam and hot water mains must be supported
separately after the exible connector to isolate piping
strains and additional expansion from the coils
9. Where more than one coil is used, each coil should
be piped independently.
10. Good engineering practices and procedures should
be applied in the design of a condensate removal
system. In particular, long piping runs to condensate
pumps should be avoided.
11. To avoid freezing of pre-heat coils when applying
steam or hot water in very cold locations, rst
raise the tube metal temperature above freezing
by applying steam or hot water to the coil prior to
passing airow over it.
Figure 3
Coil Supported From
Bottom On Angle Iron Stand
And Bulkhead In A Duct
Figure 2
Coil Supported
From Above
Note: Single row steam coil shown
Figure 4
Coil Supported On Angle Iron
Legs And Bulkhead In A Duct

– 5 –
SECTION IV - DUCTWORK AND TRANSITIONS
A. To obtain rated performance from the coils and
to eliminate air temperature control problems due
to improper duct design and/or installation, use the
following suggestions as a guide in the design of ducts
and transitions.
Angle “X” in Figure 5 should not exceed 15 degrees.
Steeper angles in duct transitions will create low
air velocities in one portion of a coil, and high air
velocities in the other portion of the coil, resulting in
poor downstream temperature control.
B. Turning vanes must be used to assure even
distribution of air over the entire coil where elbows are
used in the inlet and/or outlet side of a preheat coil.
(See Figure 6.)
C. When the coil is used as a preheat coil in
conjunction with a cooling coil located downstream
of the heating coil, a minimum space of 36" should
be allowed between this coil and the cooling coil, as
shown in Figure 7. When the cooling coil is too close
to this coil, the closed face (or by-pass) dampers on
the coil during summer operation will partially block
areas of the face of the cooling coil, reducing its
effectiveness.
D000746

– 6 –
SECTION V - EQUIPMENT PHOTOS
Photo of Indirect-Coupled VIFB (Entering Air Side)
Photo of Indirect-Coupled VIFB (Leaving Air Side)

– 7 –
Photo of Direct-Coupled VIFB (Entering Air Side)
Photo of Direct-Coupled VIFB (Leaving Air Side)

– 8 –
SECTION VI - PARTS DRAWING
Enlarged View C Section A-A
Section D-D Elevation

– 9 –
Section B-B
2 Row Hot Water
Section B-B
1 Row Steam or Hot Water
Section B-B
2 Row Steam
1 Side Panel Drive Side
2 Angle Lifting Eye
3 Supply Header
4 Closed-Circuit Header
5 Plain Washer – 3/8"
6 5/16" Diameter Hole For Duct or Sang Attachment
7 Connecting Bar
8 Side Panel
9 Snap-Bushing
10 Return Header
11 Casing Support Channel
12 Optional Weather Proof Control Housing
13 Drive Assembly
14 Top and Bottom Panel
15 Bearing Nylon
16 Washer - Special
17 Finned 5/8" Tube
18 Damper
19 Washer – 1" O.D.
20 Palnut-Fastener
21 Plain Washer – 3/16"
22 Rivet – Brass
23 Damper Rod
24 Bearing Nylon
25 Washer – 1/2"
26 Retaining Clip
27 Shipping Bolts to be removed before
applying Steam or Hot Water
No. Description No. Description

– 10 –
SECTION VII - PIPING
12. Each coil in a coil bank or in series should be
individually trapped and vented. MV coils require
two traps.
13. The steam trap should have provisions for air
venting. If the trap is non-venting, proper air vents
should be provided for each coil section to eliminate
condensable gases. All air vent lines should be
minimum one-inch diameter and properly pitched to
assure free venting of air. The venting device should
be located at least 12 inches above the bottom of the
coil casing. In low-pressure steam systems (15 psig
and below) in which a non-venting trap is used for
condensate removal, a thermostatic air trap should
be installed in a one-inch diameter air line bypassing
the condensate trap to the atmospheric return main.
An automatic air vent should be installed in a one-
inch diameter air line before the condensate trap
on systems with a vacuum return system. In high-
pressure steam systems (above 15 psig) in which a
non-venting trap is used for condensate removal, an
automatic air vent should be installed in a one- inch
diameter air line before the condensate trap. Do not
return vented air to the condensate return main.
14. A bypass line with valve should be installed around
the trap to permit operation of the coil during trap
maintenance. This feature will also provide better
coil start-up conditions when temperatures are
below freezing.
15. If condensate must be lifted above the coil return
level into overhead mains or if return mains are
pressurized, then a pump and receiver should be
installed between the condensate traps and return
mains.
16. Proper vacuum breakers should be furnished as
shown on the piping diagrams.
17. Swing check valves of 15-degree type should be
utilized to prevent condensate backup in the case
of steam system failure. Vertical lift check valves
or 45-degree swing check valves should not be
used as they require a higher head pressure of
water for opening.
Hot Water Systems
1. Install the casing level; tubes must be vertical.
2. Inlet and outlet mains should be anchored and
supported independently of the Wing coil.
3. Inlet piping must incorporate a exible connector
to provide for at least 3/8" tube expansion and
contraction, and to allow the return header to oat.
The integrity of the system depends in part on proper
piping. The following recommendations should be
diligently observed:
Steam Systems
1. All piping in contact with airow or inside an air
hander should be insulated.
2. Install casing level; tubes must be vertical.
3. Full steam pressure must be supplied to the coil at
all times; modulating valves must not be used.
4. Steam mains, return mains and traps should be
anchored and supported independently of the
steam coil. Traps and condensate piping must be
supported on spring-loaded hangers or pads to
isolate forces from the return header.
5. Each return piping must incorporate a exible
connector to insure at least 3/8" tube expansion and
contraction, and to allow the return header to oat.
6. A drip trap should be installed in the steam supply
line and drip into the return main. This will prevent
steam line condensate from entering the unit with the
steam. Avoid dripping steam mains into the steam
coil or into the line between the steam coil and traps.
7. Use only bucket or thermostatic oat traps for
condensate removal. Thermostatic traps should be
used for venting only.
8. Steam traps should be sized for three times the
calculated condensate loading at the coil design
conditions, based on the pressure differential across
the trap rather than the boiler pressure. Each trap
should be selected for the actual pressure differential
across the trap, not the boiler pressure. Pressure
differential is herein dened as the gauge pressure at
the trap minus the pressure in the return main.
9. The return connection should be full size of the
coil header and reduced at the trap. Use of a
reducing bushing on the coil return connection is not
recommended. (If shutoff valve, strainer and trap are
piped together with pipe nipples, then the pipe can
be reduced to the trap inlet size at the shutoff valve).
10. Strainers should be installed ahead of traps to
prevent dirt and sludge from affecting trap operation.
When the “closed circuit gravity return system” leads
directly to the boiler, the coil traps should be located
at least two feet above the water line of the boiler.
11. Risers should not be installed in condensate
return lines.