Controllers/Thermostats
Overview
Compact, field-assembled controller intended for single-circuit on/off control using a United Electric 54-Series pressure/temperature switch in a sealed poly enclosure. Component selections and ratings below are suitable for industrial and commercial electrical applications when installed per NEC and equipment standards.
Important compliance note
The listed ground-fault breaker (NDB1L-32C Series) is UL1053 recognized (GFI/RCBO) and is not a UL489 branch circuit breaker. Provide upstream branch protection per NEC with a UL489 device of appropriate rating. Assembly certification (e.g., UL 508A) is not implied by this datasheet.
Bill of Materials (BOM)
Item | Component | Manufacturer / Part No. | Qty |
A | Enclosure, hinged, gasketed | Bud Industries NBF-32312 | 1 |
B | Pressure/Temperature Switch (thermostat) | United Electric Controls 54 Series | 1 |
C | GFCI/RCBO Circuit Breaker (DIN rail) | ASI NDB1L-32C-xx-120V, C-curve | 1 |
D | 4-wire feed-through terminal block (6.2 mm) | ASI ASIUDK4 | as reqād |
E | DIN rail, aluminum, 1 m | Schneider Electric 16-700DIN (16700DIN) | 1 (cut to fit) |
F | Internal wiring (example) | Cerrowire 112-3873J (10 AWG, THHN/THWN-2) | as reqād |
G | LED Indicator Lamp, green | YuCo YC-22G-3 | 1 |
H | 3-wire Ground Terminal Block, yellow-green | ASI ASIUK3TWINPE (compatible) | as reqād |
Component Ratings & Certifications
Enclosure ā Bud Industries NBF-32312
- Materials: PC/PBT blend, light gray; flammability UL94-5VA; UV-stabilized
- Environmental Ratings: IP66; NEMA 1, 2, 4, 4X
- Construction: All-plastic (incl. hinge pins), continuous gasket; includes stainless-steel wall-mount brackets; two plastic latches
- Dimensions (ext): ~8.33 Ć 6.36 Ć 3.94 in (212 Ć 161 Ć 100 mm)
Thermostat ā United Electric Controls 54 Series
- Switch Type: 1 Ć or 2 Ć SPDT snap-action; field-adjustable setpoint
- Electrical Ratings (typical): 15 A @ 125/250/480 VAC resistive (select models up to 20 A @ 480 VAC)
- Approvals: UL Listed; cUL/CSA; CE (LVD & PED)
- Ambient: down to ā40 Ā°F (model dependent)
Circuit Breaker ā ASI NDB1L-32C Series (GFCI/RCBO)
- Function: Residual-current (earth-leakage) + overcurrent protection
- Poles/Trip: 1P+N (two-pole form factor) for 120 VAC; C-curve instantaneous
- Ampere Range: 6ā¦32 A (select value per load)
- Ratings: 120/240 VAC (as reqād), 30 mA earth-leakage, SCCR 4.5 kA
- Approvals: UL1053 Recognized; RoHS
Terminal Blocks ā ASI ASIUDK4
- Form Factor: 6.2 mm wide, 1-level, 4 connection points
- Conductor Range: 30ā10 AWG (UL)
- Ratings: up to 30 A, 300 V (UL)
- Materials: Housing PA, UL94-V0
DIN Rail ā Schneider Electric 16-700DIN (16700DIN)
- Type/Material: Extruded aluminum DIN rail
- Length: 1.0 m (39.37 in); cut to fit enclosure
Internal Wiring ā Cerrowire 112-3873J (example)
- Type/Size: 10 AWG, stranded copper, THHN/THWN-2
- Voltage/Temp: 600 V, 90 Ā°C wet/dry
- Standards/Files: UL 83, UL 1063, UL 758, CSA C22.2 No. 75
LED Indicator Lamp ā YuCo YC-22G-3
- Type: Panel-mount LED indicator lamp, 22 mm round
- Color: Green
- Voltage: 220ā240 VAC
- Certifications: TĆV, CE listed to European standards
- Mounting Hole: Ć 22 mm
- Construction: Plastic body with LED module, screw terminals
Ground Terminal Block ā ASI ASIUK3TWINPE (or compatible)
- Type: 3-wire ground terminal block, DIN rail mount
- Color: Yellow-green (PE)
- Conductor Range: 30ā12 AWG
- Ratings: up to 30 A, 300 V (UL)
- Materials: Housing PA, UL94-V0; metal clamp nickel-plated copper alloy
- Mounting: Standard NS35 DIN rail
- Certifications: UL recognized, CE compliant
System Ratings (when assembled as specified)
- Input supply: 120 VAC or 240 VAC
- Control device rating: Limited by UE 54-Series switch (typically 15 A resistive)
- Short-circuit protection: Upstream UL489 breaker or fuse required
Mechanical & Layout Notes
- DIN rail mounts enclosure hardware; end-stops recommended.
- Panel mount YuCo LED indicator on enclosure cover.
- Provide dedicated PE ground terminal block for safety bonding.
- Label terminals and provide grounding per NEC.
Marking & Documentation (recommended)
- Inside-door label: supply voltage, FLA, SCCR, wiring diagram, test procedure.
- Include datasheets for YuCo indicator and ASI ground terminal.
Disclaimers
Consolidated from manufacturer specifications. Verify latest datasheets and certifications for exact models. Final compliance per NEC and local AHJ.