TM 5-852-9/AFR 88-19, Vol. IX
1. General. This Operation and Maintenance Manual for the Multipurpose Recreation facility at Murphy
Dome has been prepared by the U.S. Army Engineer District, Alaska.
2. Purpose. The information contained in this manual describes the intended operation for which this
facility was designed and is intended to guide operating personnel in the operation and maintenance of the
facility.
3. Scope. This manual has four major divisions: (1) Architectural, (2) Structural, (3) Mechanical, and (4)
Electrical. Each division will discuss the required operating system operations and other problems areas which
are incorporated into the building design. Also covered will be precautionary procedures which must be
maintained in order to obtain desired system operation.
4. Supplementary material. As-built drawings of the facility, manufacturers' catalog cuts, shop drawings
and maintenance instructions on specific pieces of installed equipment are not included as a part of this
example but should be for any manual prepared.
1 -- ARCHITECTURAL
1-1. General. Common sense will provide good building maintenance, with special attention being given to
the following:
a. Vapor barrier. Vapor barrier with sealed joints has been installed on ceiling and exterior walls
between the insulation and interior finishes. All nail penetrations in the vapor barrier have been sealed with
mastic during construction; thus theoretically a continuous vapor barrier is provided. The purpose of the
vapor barrier is to prevent migration of moisture from inside the building into the insulation. If the insulation
material gets wet and freezes, the insulation will be ineffective, and when the ambient temperature rises to
about 32EF, water will drip into the building. Therefore, any damage to vapor barrier should be repaired
before cold weather and the punching of holes through the vapor barrier should be avoided. If it is necessary
to penetrate the vapor barrier, the hole must be sealed.
b. Exterior doors. All exterior doors, and particularly fire exit doors, should be kept free from an
accumulation of drifting snow to prevent blockage. Melted snow freezes and causes the doors to become
inoperative; therefore, periodic inspection of little used doors is recommended.
2 -- STRUCTURAL
2-1. General. The building structure is of permanent noncombustible building materials. Therefore, no special
maintenance is required. There are a few areas which may require minimal maintenance. These are as follows:
a. Eaves and overhangs. If sufficient glaciation occurs, water may enter the building by flowing under
the roofing. If this happens, melt the ice dam (glacier) using heat which will not harm the building system.
Condensed steam from continuous steam thawing may compound the problem caused by the water that has
entered the building; therefore, caution should be exercised when using steam.
b. Drifting snow. Snow drifting against the building can cause problems when it melts. In some
instances, the snowdrift acts as a dam holding water against the building wall. Drifting snow may also act as
a bridge to the roof and subsequent drifting on the roof. Periodic removal of drifts from the exterior of the
building will eliminate this problem.
2-2. Design loads. The design loads for the building are as follows:
Snow load is 30 pounds per square foot.
Wind load is 30 pounds per square foot.
Seismic zone is: Zone 3.
3 -- MECHANICAL
3-1. General. Included are certain precautions which must be followed if the system is to operate as
designed.
3-2. Heating.
a. System operation. The heat for the building is supplied from the central steam system. The building
heat is supplied by passing air through the ventilation unit. The room thermostat controls a set face and
bypass damper ahead of the steam coil which regulates the amount of air passing through the coil. A duct-
mounted low limit discharge controller overrides the room thermostat when necessary to prevent delivery
of air below 60EF. Steam to the coil is controlled by an automatic steam valve which opens or closes as the
face and bypass dampers open or close. When all the air is bypassing the coil, the steam valve should be
completely closed. In addition, an outdoor thermostat overrides the damper control to assure that the steam
valve is 100 percent open when the outside temperature is below 35EF.
b. Precautions.
B-2
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