VA5016012 Vortex A/C Enclosure Cooler UL Type 12
Product Information:
The product is a Vortex A/C Enclosure Cooler with UL Type 12
certification. It is manufactured by nVent Hoffman and the model
number is VA5016012. The product is designed to provide two-stage
cooling for enclosures. It is important to follow the safety
considerations and instructions provided in the user manual for
proper usage and to avoid accidents or damage.
Product Usage Instructions:
- Ensure that the compressed air line size is appropriate.
Undersized compressed air lines can cause insufficient
cooling. - Check the compressed air pressure at the product. If the
pressure is too low, it can affect cooling performance. - Inspect for any blockages in the internal compressed air paths
caused by dirt. Clean if necessary to maintain proper airflow. - Check the compressed air supply for water vapor. Water vapor
can impact the cooling efficiency, so measures should be taken to
remove it if present. - Inspect and tighten any loose cold air outlet fitting(s). Loose
fittings can affect the cooling performance. - If troubleshooting steps do not resolve the issue, contact
nVent Hoffman for further assistance at phone number
763.422.2211.
Warranty Information:
nVent Hoffman products are covered by a limited warranty.
Defective products due to manufacturing issues will be replaced or
repaired within one year from the date of invoice. However, there
are no specific warranties of merchantability or fitness for a
particular purpose.
Filter Recommendations:
| Hoffman Model # | VA5016012 |
|---|---|
| Filter | Oil Removal Filter |
| Replacement Part Item Numbers | VC-OF25 |
| Replacement Generator Kits (5 pc) | VAGK25 |
Determining Compressed Air Line Size:
- Calculate the total product compressed air consumption in SCFM
(Standard Cubic Feet per Minute) or SLPM (Standard Liters per
Minute). - Determine the length of the compressed air line required for
connection to the main supply. - Refer to Table 2 in the user manual to find the maximum airflow
(SCFM or SLPM) through the pipe at a specific pressure drop. - Locate the pipe length in the left column and read to the right
to find the compressed air requirements. - Locate the pipe size at the top of the column to determine the
appropriate compressed air line size.
Operation & Safety Instructions:
Before using the Vortex A/C Enclosure Cooler, it is important to
read and follow all instructions provided in the user manual. Here
are some general safety considerations:
- Do not operate the Vortex A/C at compressed air pressures above
150 psig (10.3 bar). - Avoid operating the Vortex A/C at line temperatures above 110oF
(43oC). - Avoid direct contact with compressed air and do not direct
compressed air at any person. - When using compressed air, wear safety glasses with side
protection to protect your eyes.
Contact nVent Hoffman at 1.763.422.2211 or visit
nVent.com/hoffman for more information about the product.
TWO-STAGE COOLING
Under normal operation, the first stage cooler (the cold air outlet that is nearest to the compressed air inlet) will activate first. This will either reduce the rate of temperature rise in the enclosure, or it will begin to reduce the enclosure temperature (depending on the heat load in the enclosure). If the heat load is significant, and the temperature continues to rise, the second stage cooler will activate, doubling the amount of cooling air. In locating the two Cold Air Ducting Kits, consideration should be given to the twostage cooling capability of the unit. The two cold air outlets and ducting kits provide for increased flexibility in directing refrigerated air in the enclosure. For example, the first stage output could be directed at a primary source of heat within the enclosure and the second stage output could be routed for overall distribution of cold air throughout the enclosure. This configuration might allow the first stage to mitigate the heat, reducing the need or operating time for the unit to run at full cooling capacity and therefore conserving energy. Or, you may want to direct the cold air from the first stage to a heat sensitive component to ensure maximum thermal protection of that component.
TROUBLESHOOTING
Insufficient cooling may be caused by the following:
1. Undersized compressed air line size. 2. Compressed air pressure at the product is too low. 3. Partial or complete blockage of internal compressed air paths,
due to dirt. 4. Water vapor in the compressed air supply. 5. Loose cold air outlet fitting(s). This may occur if not tightened
properly after being disassembled for cleaning.
If trouble persists, please contact nVent Hoffman for assistance, phone #763.422.2211.
LIMITED WARRANTY
nVent Hoffman products will be replaced or repaired if found to be defective due to manufacture within one year from the date of invoice. nVent Hoffman makes no specific warranty of merchantability or warrant of fitness for a particular purpose.
TABLE 1: FILTER RECOMMENDATIONS
Hoffman Model # VA5016012
FILTER AND REPLACEMENT PART ITEM NUMBERS
Oil Removal Filter VC-OF25
Replacement Generator Kits (5 pc) VAGK25
TABLE 2: DETERMINING COMPRESSED AIR LINE SIZE
1. Calculate total product compressed air consumption (SCFM, SLPM). 2. Determine length of compressed air line required for connection to main supply. 3. Locate pipe length in left column and read to the right to find the compressed air requirements. 4. Locate pipe size at top of column.
MAXIMUM AIRFLOW (SCFM) THROUGH PIPE AT 5 PSIG PRESSURE DROP (100 PSIG AND 70OF)
Pipe Length
Pipe Size (Nominal) – Schedule 40
(Feet)
1/4
3/8
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
10
29
65
120
254
480
978
1483
2863
4536
20
21
46
85
180
340
692
1049
2024
3208
30
17
37
70
147
277
565
856
1653
2619
40
15
32
60
127
240
489
792
1431
2268
50
13
29
54
114
215
437
663
1280
2029
60
12
26
49
104
196
399
606
1169
1852
70
11
25
46
96
181
370
561
1082
1715
80
10
23
43
90
170
346
524
1012
1604
90
10
22
40
85
160
326
494
954
1512
100
9
21
38
80
152
309
469
905
1435
MAXIMUM AIRFLOW (SLPM) THROUGH PIPE AT 0.3 BAR PRESSURE DROP (6.9 BAR AND 21OC)
Pipe Length
(Meters)
1/4
3
821
6
594
9
481
12
425
15
368
18
340
21
311
24
283
27
269
31
255
3/8 1840 1302 1047 906 821 736 708 651 623 594
1/2 3396 2406 1981 1698 1528 1387 1302 1217 1132 1075
Pipe Size (Nominal) – Schedule 40
3/4
1
1-1/4
7188
13584
27677
5094
9622
19584
4160
7839
15990
3594
6792
13839
3226
6085
12367
2943
5547
11292
2717
5122
10471
2547
4811
9792
2406
4528
9226
2264
4302
8745
1-1/2 42117 29687 24225 20999 18763 17150 15877 14829 13980 13273
2 81023 57279 46780 40497 36224 33083 30621 28640 26998 25612
2-1/2 128369 90786 74188 64184 57421 52412 48535 45393 42790 40611
Rubber hose maximum airflow rating: 1/2″ I.D. rubber hose = 3/8″ pipe; 3/4″ I.D. rubber hose = 1/2″ pipe
LIT0290M
89103850 Rev. B
OPERATION & SAFETY
INSTRUCTIONS
VORTEX A/C ENCLOSURE COOLER UL TYPE 12
Model VA5016012
I M P O R TA N T
Please read all instructions BEFORE attempting to use this product
nVent Hoffman
2100 Hoffman Way, Anoka, MN 55303 USA
1.763.422.2211
nVent.com/hoffman
GENERAL SAFETY CONSIDERATIONS
DANGER: COMPRESSED AIR COULD CAUSE DEATH, BLINDNESS OR INJURY. 1. Do not operate a Vortex A/C at compressed air pressures
above 150 psig (10.3 bar). 2. Do not operate a Vortex A/C at line temperatures above
110oF (43oC). 3. Avoid direct contact with compressed air. 4. Do not direct compressed air at any person. 5. When using compressed air, wear safety glasses with side
shields.
Avertissements pour Vortex A/C NEMA 12 Modèles VA5016012:
ATTENTION! Pour maintenir la norme UL Type 12: Lorsque monté sur la partie supérieure d’un boitier, cet appareil doit être installé de sorte que l’entrée d’air comprimé est à l’horizontale. Lorsqu’il est monté sur le côté de l’enceinte, cet appareil doit être installé de sorte que l’entrée d’air comprimé est dirigée vers le bas, vers le plancher. Faire pivoter les persiennes aux sorties d’ouvertures-persiennes orientée vers le bas. Voir les instructions d’installation.
ATTENTION! Les surfaces extérieures de l’appareil peuvent être chaudes. Eviter le contact.
INTRODUCTION
A Vortex A/C enclosure cooler is designed to use filtered compressed air to cool industrial control cabinets without the use of any refrigerants. Hot air in the cabinet is vented to the surroundings through built-in vents in the Vortex A/C. Noise generated by the Vortex A/C is comparable to normal speech levels. The Vortex A/C has built-in mechanical thermostats that require no electricity. To operate, simply install on your enclosure and connect the compressed air source.
COMPRESSED AIR SUPPLY
The compressed air supply must be filtered (5 micron maximum) to remove water and dirt. A 5 micron filter is supplied for this purpose (Hoffman filter model VAAF50). If oil is present in the compressed air supply, remove the oil using an optional 0.01 micron coalescing filter (Hoffman model VC-OF25). Filter recommendations are given in Table 1.
If an oil removal filter is necessary, install it downstream of the 5 micron filter. Change the filter elements as needed (see Maintenance).
The appropriate size of compressed air supply line should be selected to ensure optimal performance of the Hoffman product. Please refer to Table 2 to determine what supply line size is recommended for your application. Contact nVent Hoffman for assistance, phone #763.422.2211.
INTERNAL CABINET PRESSURE
The Vortex A/C, when operating at 100 psig (6.9 bar), will maintain the internal enclosure pressure at approximately 35″ (889 mm) of water column. When the Vortex A/C is not cooling (when the thermostats sense acceptable temperatures), the Vortex A/C is
not pressuring the enclosure. If you desire a constant positive internal enclosure pressure, even when the Vortex A/C is not cooling, this may be accomplished by removing two set screws that are adjacent to the mechanical thermostats on the bottom of the unit. By removing both of these set screws with a 3/32″ (2 mm) hex key, a small amount of air (6 cfm or 170 lpm) will pressurize the sealed enclosure to approximately 1.5″ (38 mm) water column. This “pressurization air” will run continuously, regardless of the thermostat operation, until the set screws are re-installed.
MAINTENANCE
The only maintenance involved with the Vortex A/C is normal element changes to the compressed air filter. The filter element should be changed when there is a noticeable decrease in performance or when pressure drop across the filter exceeds 5 psig (0.3 bar). The Vortex A/C has only two moving parts (the mechanical thermostats/valves) which are not serviceable in the field. Do not disturb the setting of the thermostats. Evidence of tampering with the thermostats may void the warranty.
If it is suspected that the compressed air filter has not been maintained after an extended period of operation, there may be dirt in the Vortex A/C. If the Vortex A/C is not cooling sufficiently, there may be debris in the “generators” of the unit. To check, pull the 1/2″ (13 mm) inside diameter vinyl tubing off the cold air outlets of the Vortex A/C and unscrew (with a 1″ (25 mm) open end wrench) the cold air outlets. Remove the O-rings. Remove the white nylon washer(s). Then remove the brown generators. Inspect the six slots in the generators for dirt and clean if necessary. Clean the cavities in the Vortex A/C that the generators were located in if necessary. Reassemble in reverse order. Tighten the cold air outlets to 100 inch-pounds (11 newton meters) torque. Be sure to supply clean (filtered to 5 micron) and oil free compressed air to the Vortex A/C.
INSTALLATION
To maintain the UL Type 12 rating, the Vortex A/C MUST be installed in one of the following configurations on a UL Type 12 enclosure:
a. Top mounted in an upright and vertical orientation, on a flat horizontal surface (as shown)
b. Side mounted, on a flat vertical surface of the enclosure, with the compressed air inlet pointing downward to the floor. Also, when side mounted, rotate the two louvered outlets on the back of the unit so that the louvers point downward to the floor. If side mounted, locate the Vortex A/C so that it is near the top of the enclosure.
1. Position the Vortex A/C on the top or side of your enclosure so that there is sufficient clearance for the internal mechanical thermostats and cold air outlets, and so that the entire mounting “footprint” of the Vortex A/C is supported by the enclosure. (A 9-1/2″ wide x 3-1/2″ deep (241 mm wide x 89 mm deep) area). Position the unit so that the louvered outlets on the back of the Vortex A/C are away from personnel, if possible. Also, position so that no internal enclosure components obstruct air flow around the mechanical thermostats.
2. Cut two 1-15/16″ (49 mm) diameter holes (1-1/2″ knockout size) on 4″ (102mm) centers in the selected location on the
enclosure. De-burr any sharp edges around these holes.
3. Remove the 1-1/2″ electrical locknuts from the Vortex A/C. Insert the threaded portions of the Vortex A/C into the 1-15/16″ (49 mm) holes in the enclosure. (Be careful not to damage the mechanical thermostats during installation.)
4. From inside the enclosure, screw the electrical locknuts onto the threads of the Vortex A/C. Tighten the locknuts securely to compress the 1/8″ (3 mm) thick sealing gaskets that are positioned between the enclosure and the Vortex A/C.
5. Determine suitable locations for the Cold Air Mufflers inside the enclosure that are close to the cold air outlets of the Vortex A/C. (You will need a surface area of approximately 2″ x 9″ (50 mm x 229 mm) to mount each muffler. The Mufflers can be mounted in any orientation, horizontal or vertical.) Using the supplied Muffler Mounting Clamps (with double sided tape), attach the Clamps at the desired locations. Clean the mounting surfaces so that the double sided tape bonds securely. If desired, the Clamps can be permanently mounted to the enclosure using the supplied mounting hardware. Two 5/32″ (4 mm) diameter holes positioned on 3/4″ (19 mm) centers must be drilled to mount the Muffler Clamps. Use the plastic snap rivets to secure the Muffler Clamps to the panel.
6. Snap the Cold Air Mufflers into the Mounting Clamps.
7. Cut a sufficient length of the 1/2″ (13 mm) inside diameter vinyl tubing from the supplied VADK124X Cold Air Ducting Kits to connect the cold air outlets of the Vortex A/C to the hose barbs on the Cold Air Mufflers. Attach the lengths of vinyl tubing so that they are free of sharp bends and kinks. Direction of cold air flow through the Mufflers is not important.
8. Attach all (or a portion of) the remaining supplied vinyl tubing of the VADK124X Cold Air Ducting Kits to the opposite hose barb connections on the Cold Air Mufflers. Holes can be punched or drilled into the 1/2″ (13 mm) tubing to distribute the cold air evenly inside your enclosure, or, the entire cold air output can be directed to a heat sensitive component. If the end of the 1/2″ (13 mm) vinyl tubing is plugged, at least sixteen 1/8″ (3 mm) diameter holes should be punched into the tubing to allow the cold air to escape. Use the nine self adhesive tubing clips provided with each kit to mount the tubing.
9. Connect the compressed air filter model VAAF50 to the compressed air inlet on the side of the Vortex A/C with a short length of 3/8″ pipe and a 3/4″ npt x 3/8″ npt pipe reducer bushing. Install the compressed air filter as close as possible to the Vortex A/C, in a location where the temperature does not exceed 125oF (52oC). Allow the filter to hang at the side of the enclosure as shown in the installation drawing. Use a 13/16″ (21 mm) wrench to hold the air fitting on the side of the Vortex A/C stationary while tightening the pipe connections. Note the air flow direction arrow on top of the filter.
10. Connect the compressed air supply to the inlet of the air filter. See “Compressed Air Supply”.
OPERATION
Operate the Vortex A/C at 90 to 100 psig (6.2 to 6.9 bar) compressed air pressure. Do not operate at pressures above 150 psig (10.3 bar). Operation at pressures less than 90 psig (6.2
bar) and above 100 psig (6.9 bar) will effect the operation. When properly sized for the application, the Vortex A/C will maintain the internal enclosure temperature between 75-100°F (24-38°C). Enclosure temperatures can momentarily reach 125°F (52°C) during initial start-up and after long periods of inactivity.Variations in heat load and compressed air conditions can effect thermostat operation. The mechanical thermostat will regulate an internal valve to minimize compressed air usage and maintain enclosure temperatures within the range specified. In some applications, the Vortex A/C may run continuously at lower air usage with the benefit of always keeping the enclosure under slight internal pressure. In other applications, the Vortex A/C may cycle on and off to maintain enclosure temperatures.
NOTICE: The thermostat’s reaction to temperature change depends on several factors: the internal and external heat loads, enclosure size and proximity to the heat source. When the internal heat load is zero (or very low) and when external temperatures are below 50°F (10°C), the thermostat will take longer to react to air temperature increases. There will be a lag between the rising air temperature and when the thermostat reacts, which can result in temperatures inside the enclosure exceeding 125°F (52°C). When air and thermostat temperatures equalize, the reaction to temperature change is improved and the lag is minimized.
CAUTION: The louvered outlets on the back of the Vortex A/C become hot during operation and can remain hot for a period of time after the unit has cycled off. Note warning label precaution, and avoid direct contact with this area of the unit during or after operation.
Filter
6-3/8″ (162 mm)
Holes 1-15/16″ (49 mm)
1-3/4″ (44 mm) diameter x 3-19/32″ (91 mm) long
muffler and mounting clamps (Qty. 2)
Vent Air
VORTEX A/C TYPE 12
(SHOWN TOP MOUNTED ON CUSTOMER’S ENCLOSURE)
We connect and protect | nVent
