Installation: Mechanical . Trane CVHE-SVX02M-EN, CVHG, CVHF, CVHE
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Installation: Mechanical
Operating Environment
• The standard chiller is designed for indoor use only and as such has NEMA
Type 1 enclosures.
• For chillers in unheated equipment rooms, contact your local Trane Service
Agency for methods to ensure that the oil temperature is maintained suitable for proper operation of the chiller.
Rigging
Lifting is the recommended method for moving chillers. Suggested lifting arrangements for standard units are described in
“Standard Chiller Lift,” p. 22
.
CVHG CenTraVac ™ chillers must be at least 16 ft
(4.9 m) long.
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To ensure that electrical components operate properly, do NOT locate the chiller in an area exposed to dust, dirt, corrosive fumes, or excessive heat and humidity.
The maximum ambient temperature for chiller operation is 104°F (40°C).
Foundation Requirements
Chiller mounting surface must be:
• rigid non-warping mounting pads or a concrete foundation, and
• able to support the chiller at its full operating weight (including completed piping and full operating charges of refrigerant, oil, and water).
For proper unit operation, the chiller must be level within 1/16 in. (1.6 mm) over its length and width when set into place on the mounting surface.
and
show approximate weights for various chiller sizes and options in pounds and kilograms, respectively.
submittal package.
equipment problems resulting from an improperly designed or constructed foundation.
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Standard Chiller Lift
1. Insert clevis connections at the points indicated in the following figure. A 2 in. (50.8 mm) diameter lifting hole is provided at each of these points.
2. Attach the lifting chains or cables.
3. Once the lifting cables are in place, attach a safety chain or cable between the first-stage casing of the compressor and the lifting beam.
safety cable; the cable is used only to prevent the unit from rolling during the lift.
CVHE-SVX02M-EN
4. Position isolator pads or spring isolators beneath the chiller feet (refer to
for instructions).
isolator manufacturer, being careful to not damage isolator adjustment bolt.
5. Once the isolators are in place, lower the chiller— working from end to end—in small increments to maintain stability.
6. When lift is complete, detach the clevis connections and safety chain.
CVHE-SVX02M-EN 23
Special Lift Requirements
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If the chiller cannot be moved using a standard chiller lift, consider the following:
• When job site conditions require rigging of the chiller at an angle greater than 45° from horizontal
(end-to-end), the unit may require removal of the compressor. Contact Trane or an agent of Trane specifically authorized to perform start-up and warranty of Trane® products regarding the disassembly and reassembly work. For more information, refer to
.
dowel-pinning the compressor and removing it from the unit. Contact Trane or an agent of
Trane specifically authorized to perform startup and warranty of Trane ® products for specific rigging instructions. Do NOT attempt to rotate the chiller onto its side.
• When lifting the chiller is either impractical or undesirable, attach cables or chains to the jacking slots shown in
; then push or pull the unit across a smooth surface. Should the chiller be on a shipping skid, it is not necessary to remove the skid from the chiller before moving it into place.
• If removal of the compressor or economizer assembly is necessary to move the chiller to the
24 operating location, contact Trane. Also refer to
“Factory Warranty Information,” p. 3 .
Unit Isolation
To minimize sound and vibration transmission through the building structure and to ensure proper weight distribution over the mounting surface, always install isolation pads or spring isolators under the chiller feet.
otte
) are provided with each chiller unless spring isolators are specified on the sales order.
Specific isolator loading data is provided in the unit submittal package. If necessary, contact your local
Trane sales office for further information.
pads or spring isolators, remember that the control panel side of the unit is always designated as the front side of the unit.
Isolation Pads
When the unit is ready for final placement, position isolation pads (18-in. [457.2-mm] sides) end for end under the full length of the chiller leg. The pads measure 9 in. × 18 in. (228.6 mm x 457.2 mm) and on some units there may be small gaps between pads.
Pads are provided to cover entire foot. Place pad flush with the outside edge of the chiller foot and leave excess material under the chiller.
Figure 6. Isolation pad and dimensions
A = 3/8 in. (9.5 mm)
B = 18 in. (457.2 mm)
C = 9 in. (228.6 mm)
Remember that the chiller must be level within 1/16 in.
(1.6 mm) over its length and width after it is lowered onto the isolation pads. In addition, all piping connected to the chiller must be properly isolated and supported so that it does not place any stress on the unit.
Spring Isolators
Spring isolators should be considered whenever chiller installation is planned for an upper story location. Base isolator placement is shown in the following figure.
CVHE-SVX02M-EN
Figure 7. Isolation spring placement by shell size, and evaporator and condenser length
Spring isolators typically ship assembled and ready for installation. To install and adjust the isolators properly, follow the provided instructions.
piped and charged with refrigerant and water.
such as the lubrication system with fieldinstalled devices such as spring isolators.
1. Position the spring isolators under the chiller as shown in the preceding figure. Ensure that each isolator is centered in relation to the tube sheet.
not be identical. Compare the data provided in the unit submittal package to determine proper isolator placement.
2. Set the isolators on the sub-base; shim as necessary to provide a flat, level surface at the same elevation for the end supports.
isolator base plate; do NOT straddle gaps or small shims.
3. If required, bolt the isolators to the floor through the slots provided, or cement the pads.
necessary unless specified.
4. If the chiller must be fastened to the isolators, insert capscrews through the chiller base and into holes drilled and tapped in the upper housing of each isolator.
below the underside of the isolator upper housing, or interfere with the adjusting bolts. An alternative method of fastening the chiller to the isolators is to cement the neoprene pads.
5. Set the chiller on the isolators; refer to
CVHE-SVX02M-EN
Chiller Lift,” p. 22 . The weight of the chiller will
force down the upper housing of each isolator, and could cause it to rest on the isolator’s lower housing (refer to the following figure).
6. Check the clearance on each isolator. If this dimension is less than 1/4 in. (6.35 mm) on any isolator, use a wrench to turn the adjusting bolt one complete revolution upward.
(refer to
), the top plate of each isolator moves down to compress the springs until either the springs support the load or the top plate rests on the bottom housing of the isolator. If the springs are supporting the load, screwing down on the adjusting bolt (refer to
) will raise the chiller.
7. Turn the adjusting bolt on each of the remaining isolators to obtain the required minimum clearance of 1/4 in. (6.35 mm).
8. Once the minimum required clearance is obtained on each of the isolators, level the chiller by turning the adjusting bolt on each of the isolators on the low side of the unit. Work from one isolator to the next.
16 in. (1.6 mm) over its length and width, and the clearance of each isolator must be at least 1/4 in.
(6.35 mm).
25
Figure 8. Chiller foot and isolator orientation
in such a way that they could inhibit chiller servicing such as charging or evacuation, oil tank service, etc.
Leveling the Unit
The chiller must be set level within 1/16 in. (1.6 mm).
1. Measure and make a punch mark an equal distance up from the bottom of each foot of the chiller.
2. Suspend a clear plastic tube along the length of the chiller as shown in the following figure.
3. Fill the tube with water until the level aligns with the punch mark at one end of the chiller.
4. Check the water level at the opposite mark. If the water level does not align with the punch mark, use full length shims to raise one end of the chiller until the water level at each end of the tube aligns with the punch marks at both ends of the chiller.
5. Once the unit is level across its length, repeat the first three steps to level the unit across its width.
Figure 9. Leveling the chiller
26
method to level the unit.
incurred during handling or installation at the job site to the Trane sales office.
CVHE-SVX02M-EN
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