Omega Products ARMTO-303-240 User Manual
MEDIUM WEIGHT OIL IMMERSION HEATER
5 (2) cold (ref)
6.4
(2.5)
min
hole
size
3 (0.475) dia. elements
2 (1.5) NPT conduit hubs (one side plugged)
Thermowell
B
23
(9.125)
20
(7.875)
B
17.9
(7.0625)
6.4 (2.5) min
hole size
5 (2) cold (ref)
Thermowell
15 (6)
(3) 0.475 dia. elements
Hole for 1.9 (0.75) conduit
With Integral Thermostat—21⁄2 NPT Steel Fitting
ARMTO-3 Series
⻬ 3 to 9kW
⻬ Rugged 3 Element Steel
Construction
⻬ Low Watt Density,
15 W/in
2
⻬ Built-in Thermostat,
Three Temperature
Ranges Available
⻬ 240 and 480V, 3 Phase
SPECIFICATIONS
Wattage: 3 to 9 kW
Power: 240, and 480V, 3 phase
Watt Density: 15 W/in
Sheath: 0.475" diameter steel
Screw Plug: 2
1
2
⁄2 NPT Steel
Thermostat: Bulb and capillary type,
three temperature ranges available
(see To Order table below)
Enclosure: E1 General Purpose,
NEMA-1 rated, or E2 moisture
resistant/explosion resistant enclosure
CAUTION AND WARNING!
Fire and electrical shock may result
if products are used improperly or
installed or used by non-qualified
personnel. See inside back cover
for additional warning.
Note: The integral thermostat functions as
a temperature control only. This is not a fail safe
device. An approved pressure and/or temperature
control should be used with these heaters to assure
safe operation. See the Temperature Section for our
selection of control devices.
Dimensions: cm (in)
E1
2
E2
Starts at
$
1100
ARMTO-303E2/240V,
$1350
ARMTO-303/240,
$1100
Both models shown
smaller than actual size.
MOST POPULAR MODELS HIGHLIGHTED!
To Order (Specify Model Number)
kW W/in
ARMTO-3 with E1 General Purpose Enclosure
3 15 3 62 (24
4 15 3 82 (32
5 15 3
6 15 3
7.5 15 3 145 (57) ARMTO-307/240 1470 ARMTO-307T2/240 1470 ARMTO-307T1/240 1470 6 (15)
9 15 3
ARMTO-3 Series with Moisture Resistant/Explosion Resistant Enclosure
3 15 3 62 (24
4 15 3 82 (32
5 15 3
6 15 3
7.5 15 3 145 (57) ARMTO-307E2/240 1700 ARMTO-307E2T2/240 1700 ARMTO-307E2T1/240 1700 9 (20)
9 15 3
Insert “208” for 208 Vac, “240” for 240 Vac, or “480” for 480 Vac. Model numbers containing 240 V are only available in that voltage.
*
1 Heaters with General Purpose Enclosures are UL Listed with T1 or T2 Temps and CSA Certified with T1, T2 or T3 Temps.
2 Heaters with Moisture Resistant/Explosion Resistant Enclosures are CSA NRTL/C Certified with T1, T2 or T3 Temps.
† Caution: Explosion resistant type E2 construction refers to heater design features which provide explosion resisting containment of electrical
wiring according to National Electric Code. Abnormal application or use of heaters which in excessive temperatures can create hazardous
conditions which can lead to fire Consult Section Z for data on allowable watt densities for more viscous materials.
Ordering Examples: ARMTO-303/240, 3 kW heater with a thermostat range of 200 to 550°F powered by 240 Vac, $1100.
ARMTO-309T2/240, 9 kW thermstat range, 60 to 250°F powered by 240 Vac, $1850.
No Htg Dim. B
2
Elem. cm (in)
101 (39
121 (47
171 (67
101 (39
121 (47
171 (67
T3 Temp. Range T2 Temp. Range T1 Temp. Range
(200 to 550°F) (60 to 250°F) (0 to 100°F)
Model No. Price Model No. Price Model No. Price kg (lb)
1
1
⁄
) ARMTO-303/* $1100 ARMTO-303T2/* $1100 ARMTO-303T1/* $1100 5 (11)
2
3
⁄
) ARMTO-304/* 1150 ARMTO-304T2/* 1150 ARMTO-304T1/* 1150 5 (12)
8
7
⁄
)
ARMTO-305/240 1250 ARMTO-305T2/240 1250 ARMTO-305T1/240 1250 6 (13)
8
3
⁄
)
ARMTO-306/* 1350 ARMTO-306T2/* 1350 ARMTO-306T1/* 1350 6 (14)
8
3
⁄
)
ARMTO-309/240 1600 ARMTO-309T2/240 1100 ARMTO-309T1/240 1600 7 (16)
8
1
⁄
) ARMTO-303E2/* $1350 ARMTO-303E2T2/* $1350 ARMTO-303E2T1/* $1350 7 (16)
2
3
⁄
) ARMTO-304E2/* 1400 ARMTO-3046E2T2/* 1400 ARMTO-304E2T1/* 1400 8 (17)
8
7
⁄
)
ARMTO-305E2/240 1500 ARMTO-305E2T2/240 1500 ARMTO-305E2T1/240 1500 8 (18)
8
3
⁄
)
ARMTO-306E2/* 1600 ARMTO-306E2T2/* 1600 ARMTO-306E2T1/* 1600 9 (19)
8
3
⁄
)
ARMTO-309E2/240 1850 ARMTO-309E2T2/240 1850 ARMTO-309E2T1/240 1850 10 (21)
8
2
†
F-37
Wt.
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