Singapore 1800 622 1156 | Intl +65 6415 5353 | Welcome to our new site - found a bug? Please report it here
Series-A-900-A-901
NEMA 4X Weatherproof Housings for Indoor/Outdoor Use - A-900 & A-901
- Can be used outdoors with UV stabilized material
- Simple installation with fiberglass material, which is easily punched or drilled for conduit connections
- Versatile units are compatible with Love® controls Series 2500, 2600, 4B, 4C, and 4G, and Mercoid® Series MPC and MPCJR
Series-A-900-A-901
From
SGD
373.56
Product Overview
- Applications Boilers, Oil, Pump Control
- Enclosure Ratings IP66, NEMA Type 1, NEMA Type 12, NEMA Type 13, NEMA Type 2, NEMA Type 3, NEMA Type 3R, NEMA Type 4, NEMA Type 4X
- Height 7.75 in
- Length 4.25 in
- Materials Polycarbonate, Polyester Nonwoven Fabric, Neoprene, Stainless Steel
- Operating Environment Indoor or Outdoor
- Operating Temperature, Max 131 °F
- Operating Temperature Note 77°F, 104°F, 131°F. When using the enclosures with controls that have 10 A relay outputs the extra heat generation decreases the maximum ambient temperature value that the control can be used at inside the enclosure. Other outputs on our controls are not a concern
- Series ID Series-A-900-A-901
- Width 7.75 in
Supported Applications
The Dwyer Series A-900 and A-901 are NEMA 4X weatherproof control enclosures designed for indoor or outdoor use. These housings protect installed controls from dirt, dust, oil, and water. The series accommodates 1/4 DIN panel-mounted instruments.
Operating Conditions & Performance
The enclosure rating is NEMA 4X (IP66). Constructed from UV stabilized fiberglass reinforced polyester, the units are rated for ambient temperatures up to 77°F (25°C), 104°F (40°C), or 131°F (55°C) depending on the internal control's heat generation. UL approval is listed.
When used with controls featuring 10 A relay outputs, maximum ambient temperature limits are reduced due to extra heat generation inside the enclosure. Specific current derating applies for models including 25XX3, 26XX3, 26X3X, 26X33, MPC, and MPCJR:
- At 77°F (25°C): Maximum current is 10 amps.
- At 104°F (40°C): Maximum current drops to 9 amps for the A-901; remains 10 amps for the A-900.
- At 131°F (55°C): Maximum current is 7.5 amps for the A-900 and 6 amps for the A-901.
Configuration Options
The series offers two primary configurations to suit different mounting requirements:
- A-900: Features a standard 1/4 DIN cutout in the front cover, allowing controls to mount directly into the panel.
- A-901: Includes a clear plastic front window with a rear panel for mounting the control inside the enclosure.
Both models include a lockable latch to prevent unauthorized removal of the control. Physical dimensions are 7-3/4 [195.33] in height, 7-3/4 [195.33] in width (top view), and 4-1/8 [106.17] depth. The front cutout measures 4-1/4 [107.95] x 4-1/4 [107.95]. Mounting holes are specified as 3-39/64 [91.68] on the top view and 10-32 UNF-2B TYP 8 PLCS on the bottom view.
Available accessories include Model A-600, an R/C snubber.
Key Product Differences
The primary distinction between models is the front cover design. The A-900 provides a direct panel mount interface via its cutout, while the A-901 utilizes a clear window and internal rear mounting plate. Both share identical enclosure ratings (NEMA 4X), materials (UV stabilized fiberglass reinforced polyester), and overall external dimensions.
PDFs & Manuals
