Models 3940 and 3949 _________________________________________________________________________Spare Parts
7 - 1
Humidity
Control ±5% RH
Range Above ambient to 95%
Sensor Bulk polymer
Controller Electronic, direct set in % RH
Setpoint Digital
Display Digital LED
Readability 1.0%
Setability 1.0%
Steam Gen. Initial fill approx. 1 quart (.95 liters)
Fittings
Fill Port 1/8” FPT
Drain Port 3/8” (1.9 cm) FPT
Unit Heat Load
115V 5500 BTUH (1600W)
220V 6000 BTUH (1750W)
Refrigeration
Compressor 1/4 Horsepower, air-cooled
Refrigerants Non-CFC
Electrical
3940/4940 208-220V, 1 PH, 60Hz, 3P, 4W,
14.0 FLA
3949/4949 220-240V, 1 PH, 50/60Hz, 2P, 3W,
14 FLA
Line Cord None (lockable disconnect provided)
Dimensions
Exterior 38.00”W x 87.50”H x 32.00”F-B
(96.52 cm x 222.25 cm x 81.28 cm)
Interior 31.00”W x 60.00”H x 27.00”F-B
(78.74 cm x 152.40 cm x 68.58 cm)
Continuing research and improvements may result in speci-
fication changes at any time. Performance plus or minus
the least significant digit unless otherwise specified.
* Better than ±0.5°C uniformity at all other temperature
parameters.
Section 7 - Spare Parts
Part No. Description Qty
290163 RTD Temperature Sensor 1
230066* Fuse, Ceramic 10A 350V 1
400051 Power Supply 1
290162 RH Sensor 1
231186 Controller, Watlow 982 Auto Tune 2
320277 Triac, 25A 2
285615* Fuse, Fusetron 25A 2
620430* Humidifier Heater 1
270010 Thermostat, B-10 0-220F 1
131300 Blower Wheel 1
410048 Defrost Timer 1
630090 Heater 1
205062 Condensing Unit, 1/4 HP 115V R-134A 1
991334 Solenoid, 120V .101” Port 1
285599 Thermal Fuse, 250V 17A 1
830044 Blower Motor, 1/4 HP, 115V 1
*Immediate Stock
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