Dunham-Bush ACDX, Installation, Operation And Maintenance Instructions

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GENERAL outdoor application and may be mounted on roof or at
Packaged chillers are designed to cool water or other non- ground level.
corrosive liquids. Water is circulated through the direct
expansion cooler where it is cooled to the desired
Since these units are air cooled, the flow of air to and from
temperature then circulated to cooling coils for air the condenser coil must not be impeded. There must be no
conditioning, or to other types of heat exchangers for obstruction above the unit that would tend to deflect
process cooling. discharge air downward where it could be recirculated back
Care should be taken to see that the equipment is properly fan outlets.
installed and adjusted. An installer or operator should first
become familiar with the information contained in this
The unit must be installed with sufficient clearance for air
manual. entrance to the condenser coil and for servicing access.
INSPECTION wall or other obstruction. See Condenser Clearance
When the equipment is delivered, it is important that the Drawing page 35. Clearance must be provided at either end
following inspection be completed in the presence of the of the unit to permit removal of tubes from the chiller.
carrier's representative.
1. Check all crates and cartons received against the Bill of fume exhausts.
Lading/Shipping Papers to be sure they agree.
2. Check the model number and the electrical that the unit should be mounted away from noise sensitive
characteristics on the nameplate to determine if they are spaces and must have adequate support to avoid vibration
correct. and noise transmission into the building. Units should be
3. Check for freight damage, shortages or other auxiliary areas where sound levels are not an important
discrepancies and note them on the delivery receipt factor. Sound and structural consultants should be retained
before signing. for recommendations on critical installations.
In the event that any damage is found, a damage claim FOUNDATION
should immediately be filed by the purchaser against the
delivering carrier as all shipments are F.O.B. Factory.
Refer to index for unit dimensions and load points.
RIGGING functioning of controls and provision must be made for
General - Each unit has been carefully tested and crafted at dimensions. Roof mounted units must be supported on
the factory where every precaution is taken to assure that adequate steel structure. If units are located on the ground
the unit reaches you in perfect condition. It is very important level, a concrete base is recommended.
that the riggers and movers should use the same care and
precaution in moving the equipment into place. Make sure
VIBRATION ISOLATION
that chains, cables, or other moving equipment are placed
so as to avoid damage to the unit or piping. The refrigerant
Under certain critical conditions, it may be necessary to
piping must not be used as a ladder or as a hand hold. Do install vibration isolators under the base of the Packaged
not attach a chain hoist sling to the piping or equipment. Chiller.
Move the unit in an upright position and let it down gently
from trucks or rollers.
Rubber-in-shear or spring vibration isolators are offered as
Rigging and Moving - Any unit mounted on skids may be connections must be installed in the water piping system
moved with a forklift, but care must be taken not to damage and in the refrigerant lines of split systems. Note: These
the unit with forks. The skids should not be removed until flexible connectors must be suitable for the fluid and
the unit is at its final location. pressures involved.
The ACDX/AUDX 040-060 units are to be rigged thru the All piping which is external to the packaged chiller must be
small holes at the bottom of each leg. On units with optional supported by spring mounted hangers and any piping which
louvers, it will be necessary to remove labeled louver panels goes through the wall, ceiling or floor should be properly
to gain access to the rigging holes. Models 080 thru 255 are sheathed to prevent transmission of piping vibration to the
to be rigged thru the holes in the base side rails. In all structure.
cases, spreader bars must be used between rigging lines to
prevent coil or fan deck damage. The unit must be lifted
When spring isolators are used, electrical service to the unit
using All Rigging Points. Refer to Rigging Instructions on must also be flexibly connected, by means of a 36" section
page 36. of flexible conduit.
All models can be pushed or pulled (with chains) from the PIPING CONNECTIONS
control box end only. Truck forks must be kept level and not
tilted back. Do not raise the end of the unit more than 2" off
the floor.
LOCATION & MOUNTING
Model ACDX Air Cooled Packaged Water Chillers and
AUDX Air Cooled Condensing Units are designed for
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to the inlet of the unit. Ductwork must not be applied to the
The unit should be located no closer than four feet from any
Units must not be located in the vicinity of steam, hot air or
Another consideration which must be taken into account is
mounted over corridors, utility areas, rest rooms or other
Foundations must be level for proper operation and
supporting the individual load points as shown in the unit
optional items. When spring isolators are used, flexible
Water Connections, Chilled Water Piping - After the unit
has been leveled, the external water piping may be made
up. Be sure water piping is connected to the correct fittings.
The water out connection is closest to the expansion valve
(R-in) end. A chilled water flow switch must be installed in
the external chilled water outlet piping.