Free-Stand Cabinets Liquid-Cooled Cabinets
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Free-Stand Cabinets
Liquid-Cooled Cabinets
Spec-00555
E
763.422.2661
763.422.2588
VARISTAR LHX
INDUSTRY STANDARDS
SPECIFICATIONS
NEMA Type 12
IP 55
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APPLICATION
ormed steel frame, top, base and sides
F
S eamless foam gaskets on doors
Left-mounted, water-cooled heat exchanger has 20 or 40 kW
cooling capacity
115 VAC input
Standard NEMA 15R plug on a 6-ft. cord
R J 45 internet connection
R S 232 port
1-in. copper water and condensation fittings (NPT) located at the
bottom of the heat exchanger
Static load rating of 400 kg (880 lb.) for 19-in. equipment
VARISTAR LHX is a sealed, self-contained cabinet with an internal
air-to-water heat exchanger which uses water to remove heat from
the cabinet. Completely sealed from outside air and contaminants,
this cabinet is ideal for high-density network, industrial and
remotely located equipment. The cabinet provides up to 20 kW of
heat dissipation from internal 19-in. rack-mounted equipment. The
sealed design significantly reduces acoustic noise from internally
mounted equipment.
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FEATURES
RAL 7021 black textured, low-gloss polyester powder paint over
pretreated steel.
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afety glass window door opens 180 degrees with multi-point
S
latch system and central key lock (key code 333)
Solid steel rear door opens 180 degrees with 4-point vault locking
system and central key lock
Removable panels on sides
Die cast metal posts on all corners of plinth base
Two sets of painted rack angles included
EIA spaced .375-in. square holes (42 RU spaces)
100-mm plinth base with removable side panels
E asy-to-replace multiple fan construction
Local monitoring displays condensation, temperature, humidity,
fan failure, access, and inlet and outlet water temperature
Additional connections available for other monitoring devices
All exterior panels and doors cable grounded
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FINISH
ACCESSORIES
CABLETEK™ Horizontal Cable Manager
Rack- and Panel-Mount Power Distribution Units (PDUs)
Tool-less Shelf
Tool-less (Snap-in) Blanking Panels for 19-in. Racks
Bulletin: DPSR
Standard Product Catalog Number
DV218012LX2
DV218012LX4
1
AxBxC in./mm
82.68 x 31.50 x 47.24
2100 x 800 x 1200
82.68 x 31.50 x 47.24
2100 x 800 x 1200
Networking
VAC
115
Hz
50/60
Phase
1
Full Load Amps
8.6
Max. Cooling
20 kW
Water Inlet Temp.
7-15 C (45-60 F)
Airflow Max.
m3/hr.
3,000 (1,766 CFM)
Rack Units
42
115
50/60
1
12.4
40 kW
7-15 C (45-60 F)
4,200 (2,472 CFM)
42
SUBJECT TO CHANGE WITHOUT NOTICE
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
Free-Stand Cabinets Liquid-Cooled Cabinets
47.28
1201 mm
31.50
800 mm
42 RU
73.5
1867 mm
10.8
275 mm
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
19
483 mm
83.11
2111 mm
87951038
7.12
180 mm
37 MAX / 22 MIN
950 mm / 550 mm
PH 763.422.2661 • FAX 763.422.2588 • HOFFMANONLINE.COM
Networking
2
Free-Stand Cabinets Liquid-Cooled Cabinets
3
Networking
SUBJECT TO CHANGE WITHOUT NOTICE
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
Free-Stand Cabinets Liquid-Cooled Cabinets
Varistar_Features
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
PH 763.422.2661 • FAX 763.422.2588 • HOFFMANONLINE.COM
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4
Free-Stand Cabinets Liquid-Cooled Cabinets
LHX 20
Usable Cooling Capacity (at constant incoming air temperature of 104°F (40°C))
45
46
48
50
52
54
55
57
kW
59 °F
20
kW
20
at 9
9
18
at 5
5
16
ft 3/
ft 3/
hr (
hr (
1.55
14
2.80
18
m 3/
hr)
wat
er
16
m 3/
hr)
wat
er
14
12
12
10
10
7
8
9
10
11
12
Water Flow Temperature
13
14
15 °C
Air Exit Temperature (at constant incoming air temperature of 104°F (40°C))
45
46
48
50
52
54
55
57
°C
59 °F
°F
26
79
24
55
(1.
3 /hr
t
f
5
at 5
22
75
3
er
wat
)
r
3 /h
0m
72
2.8
hr (
/
9 ft
9
t
a
20
68
18
64
10
50
7
5
er
wat
)
r
h
m/
3
Networking
8
9
10
11
12
Water Flow Temperature
SUBJECT TO CHANGE WITHOUT NOTICE
13
14
15 °C
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
Free-Stand Cabinets Liquid-Cooled Cabinets
LHX 20
LHX 20 Diagram of Cold Air Temperature/Cooling Capacity
°F °C
90 32
Water valve 100% open=99 ft3/hr
(2.8 m3/hr) fan speed 100%
Cooling Air Temperature
86 30
H2O=68°F
(20°C)
Temperature Difference ΔT (H2O) K
7.50
H2O=63°F
(17°C)
H2O=59°F
(15°C)
H2O=54°F
(12°C)
H2O=50°F
(10°C)
Control range is
via
water volume,
82 28
fan speed
constant 80%
79 26
H2O=46°F
(8°C)
H2O=45°F
(7°C)
75 24
H2O=43°F
(6°C)
72 22
3.50
64 18
/+;
61 16
2.50
ΔT (H2O) characteristic for 99 ft3/hr (2.8 m3/hr)
0
1 2
3
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
5.50
4.50
68 20
57 14
6.50
4
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
kW
Cooling Capacity with Various Water Temperatures
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1.50
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6
Free-Stand Cabinets Liquid-Cooled Cabinets
LHX 40
Usable Cooling Capacity
at 10
38
36
34
32
30
28
26
24
22
20
18
16
°C
°F
at 71
°C °F
42 108
40 104
6 ft 3/
ft 3/hr
hr (3
(2 m 3
/hr) w
ater
3
hr (2 m
1 ft /
mp at 7
e
T
t
le
t
ou
3
Air
38 100
36 97
34 93
32 90
30 86
28 82
26 79
24 75
22 72
20 68
m 3/h
r) wa
ter
/hr)
3
let Tem
Air Out
hr)
r (3 m /
3
6 ft /h
p at 10
6
7
8
9
10
11
12
13
14
15
16
17
18
19
18
16
20
43
45
46
48
50
52
54
55
57
59
61
63
64
66
68
Air Outlet Temperature
Cooling Capacity
kW
42
40
64
61
Water Pre-run Temperature
°F °C
79 26
LHX 40 Diagram of Cold Air Temperature/Cooling Capacity
H2O=64°F
(18°C)
Adjustment range of
water flow valve (fan
speed constant at 80%)
77 25
75 24
H2O=59°F
(15°C)
H2O=54°F
(12°C)
H2O=50°F
(10°C)
H2O=45°F
(7°C)
73 23
H2O=43°F
(6°C)
Cooling Air Temperature
72 22
70 21
68 20
66 19
64 18
LHX 40
63 17
Maximum water
flow rate 152 ft3/hr
(4.3 m3/hr)
61 16
59 15
57 14
0
5
10
15
20
25
30
35
Cooling Capacity with Various Water Temperatures
7
H2O=46°F
(8°C)
Networking
SUBJECT TO CHANGE WITHOUT NOTICE
40
45
50
kW
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
Free-Stand Cabinets Liquid-Cooled Cabinets
Technical Data Cooling Capacity
Adjustment range air outlet temperature
LHX 20
64.4 to 86.0 F (0.2 F increments)
LHX 40
64.4 to 86.0 F (0.2 F increments)
Technical Data Water Circuit
Cooling medium1
Water inlet temperature2
Water flow volume
Static pressure loss in device at 6.8 gal./min.
Water conduit
Water connection inlet/outlet
Condensate drain
LHX 20
Water
42.8 to 59.0 F
up to 12.36 gal./min.
7.25 PSI
Copper
Rp 1 in.
Rp 1/2 in.
LHX 40
Water
42.8 to 59.0 F
18.9 gal./min.
7.25 PSI
Copper
Rp 1 in.
Rp 1/2 in.
For optimal operation of the air/water heat exchanger, the water quality requirements must be fulfilled (VDE 3803, please see user manual).
1
At a water inlet temperature below 42.8 F and above 59.0 F, the control accuracy cannot be guaranteed. There is also a risk of condensation if the water temperature falls short of the given limits.
2
Technical Data Air Loop
LHX 20
1765 CFM
64.4 to 86.0 F
Maximum airflow volume, controlled temperature dependently
Air outlet LHX 20 (adjustable)
LHX 40
2,354 CFM
64.4 to 86.0 F
Technical Data Electrical Data AC
Maximum current consumption
Maximum power consumption
Apparent power at full load
Pre-fuse (in the building)
LHX 20
8.6 A
700 W
990 VA
10 A
LHX 40
10.4 A
1200 W
1610 VA
10 A
Technical Data Interface
ST-bus (RJ 45)
RS 232 (SUB-D 9-pin)
Digital input/output (SUB-D 25-pin)
LHX 20 and LHX 40
Connection possibility for external operation and digital display
ASCII protocol, all operational values and status reports, such as temperature, humidity levels, fan operation times
External on/off, alarm outputs and warning signals
Technical Data General Data
General Data
Cabinet type of protection
Ambient temperature during transport
Ambient temperature outside cabinet (during operation)
Noise level (closed cabinet) at 80 percent fan speed
Relative humidity level
Weight of LHX 20 (heat exchanger)
Weight of LHX 20 with cabinet (approximate)
EQUIPMENT PROTECTION SOLUTIONS
Spec-00555 E
LHX 20
IP55, Type 12
-13 to +158 F
41 to 158 F
50.7 dB(A)
5 to 95 percent
173 lb. (181 lb. with water)
750 lb.
PH 763.422.2661 • FAX 763.422.2588 • HOFFMANONLINE.COM
LHX 40
IP55, Type 12
-13 to +158 F
41 to 158 F
61 dB(A)
5 to 95 percent
242 lb.
816 lb.
Networking
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