Chromalox CMB-3A User Manual
(Supersedes PQ400-8)
PQ400-9
3001H
161-048643-001
JULY, 2009
4
and
Installation, Operation
RENEWAL PARTS IDENTIFICATION
Type CMB Electric Steam Generator
0 – 90 PSI
© 2010 Chromalox, Inc.
Output
Single Phase Three Phase
Lbs./Hr. Power Power
Vol. AT † Amperes CCT. Amperes CCT.
Model kW (Gals.) 212°F Volts Drawn Diag. Drawn Diag.
3 1.6 9 120 25 1 NA NA
CMB-3A
3 1.6 9 208 14.4 2 8.3 3
3 1.6 9 240 12.5 2 7.2 3
3 1.6 9 480 6.3 2 3.6 3
6 6 18 208 28.8 4 16.7 8
CMB-6A 6 6 18 240 24 4 14.4 8
6 6 18 480 125 4 7.2 8
9 6 27 208 43.3 6 25 8
CMB-9A 9 6 27 240 37.5 5 21.7 8
9 6 27 480 18.8 4 10.8 8
12 6 36 208 57.7 7 33.3 8
CMB-12A 12 6 36 240 50 7 28.9 8
12 6 36 480 25 5 14.4 8
15 6 45 208 72.1 7 41.6 9
CMB-15A 15 6 45 240 62.5 7 36.1 8
15 6 45 480 31.2 5 18 8
Specifications —
GENERAL
WARNING: Hazard of Electric Shock. Any installa-
tion involving electric generators must be effectively grounded in accordance with the National
Electrical Code to eliminate shock hazard.
1. Locate unit on level floor or platform.
2. Connect water line to tagged fitting on the water control feeder.
3. The incoming water supply must be 10 pounds greater than the
operating pressure. Otherwise, a high pressure feed (pump)
must be used.
4. Wire unit following wiring diagrams supplied. (See recom-
mendations on safety switches and fusing.)
5. Connect steam line with an outlet valve to boiler steam outlet.
Chromalox recommends using a globe valve one pipe size
smaller than steam line to limit any pressure drops (surges) that
may occur during start-up.
6. Open all gauge valves and steam outlet valve. Keep drain valve
closed.
7. Turn on watter supply; water will reach operation level automatically.
8. Close steam outlet valves.
9. Set thermostat for desired steam pressure (see Table 1).
10. Turn boiler switch to ON position, pilot light will go on.
Generator will Build up to desired
pressure and shut off automatically.
11. Open steam outlet valves and
use steam as needed.
12. Generator should be blown
down daily (see Blowdown
instructions).
13. Chromalox generators are pretested before shipment. No internal
wiring or piping is required.
14. Substitution of components or
modification of wiring systems
without consult of manufacturer
voids the warranty.
15. Power must be off when generator is drained.
16. Purchaser should use a safety
switch between the main power
source and the steam generator.
The safety switch should use circuit breakers or fuses.
CMB-3A
† Assuming Feedwater at 50°F.
Note — All Models listed with Underwriters Laboratories Inc.
Gauge Pressure Temperature
(psig) (°F)
0 212
1 216
2 219
3 222
4 224
5 227
6 230
7 232
8 235
9 237
10 240
15 250
20 259
25 267
30 274
35 281
40 287
45 292
50 298
55 303
60 307
65 312
70 316
75 320
80 324
85 328
90 331
Table 1 —
Temperature-Pressure
Relationship for Steam
Boiler Serial # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Circuit Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Circuit Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
National Board # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amps . . . . . . . . . . . . . . . Phase . . . . . . . . . . . Cy . . . . . . . . . . . . . . .
IMPORTANT – This data file contains the National Board Registration Certificate approving your generator. It must be kept near the generator at all times.
DIMENSIONS
Top View
C
B
D
A
Front View
Side View
®
CAUTION
1/4" NPT Outlet
1/2" NPT Inlet
Dimensions (In.)
Model A B C D
CMB-3 22-1/2 17-1/4 15 4-1/4
Dimensions (In.)
Model A B C D
CMB-6, 9, 12, 15 36-1/2 30 20 7
Top View
B
A
Front View
Rear View
D
C
®
CAUTION
1/2" NPT Outlet
1/2" NPT Inlet
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