Hammond PWS7702A230N4LG 34200 BTU/H Air/Water Heat Exchanger, 1900 mm Tall
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224-955-1644Key Features
- 34200 BTU/H air/water heat exchanger (part description)
- NEMA 3R/4 rating, Lt. Gray colour
- Drawing overall height 1900 mm (74.80 in), width 500 mm (19.69 in)
- Short description lists 230V; long description lists 115 V - verify on ID plate
- Maximum permissible operating pressure of 10 bar
- Shipping weight 188 lbs (85.28 kg); REACH and RoHS compliant
The PWS7702A230N4LG is a high-capacity air/water heat exchanger rated at 34200 BTU/H, intended for large sealed electrical enclosures that need to shed heat into a water circuit. It is a PWS Series bolt-on cooling unit for door and side mounting, suited to OEM engineers and facilities teams cooling heavily loaded control lineups.
The part data is not fully consistent on voltage: the short description reads AIR WATER EXCHANGER 230V and the part number carries 230, while the long description reads AW HX Unit 34200 BTU/H 115 V - NEMA 3R/4 - Lt. Gray. Confirm the supply voltage on the unit ID plate before wiring; the manual requires voltage within ± 10% and frequency within ± 3 Hz of the ID plate values.
The part drawing shows an overall height of 1900 mm (74.80 in), a 1800 mm (70.87 in) dimension, and a width of 500 mm (19.69 in). The PWS 7702SL drilling template uses seventeen 8 mm (0.31 in) holes. At a shipping weight of 188 lbs (85.28 kg) it is the heaviest unit in this group, so plan handling and mounting accordingly; the manual warns never to move the unit by its piping.
Per the PWS Series manual, the coolant must be at least 10 C colder than the inlet air, the maximum permissible operating pressure is 10 bar, and the unit ships with a mounting cutout, manual and technical data sheet. The PWS7702A230N4LG is listed as NEMA 3R/4 rated in Lt. Gray, REACH and RoHS compliant.
Ideal For
- High heat-load sealed electrical enclosures
- Water-cooled control lineups in hot plant areas
- Door or side mounting on tall enclosures
- Installations calling for a NEMA 3R/4 rated cooling unit
Quality
| Leak Testing | All devices are checked for leaks before leaving the factory |
Overview
| Product Type | Air/Water Heat Exchanger |
| Long Description | AW HX Unit 34200 BTU/H 115 V - NEMA 3R/4 - Lt. Gray |
| Short Description | AIR WATER EXCHANGER 230V |
Dimensions
| Overall Width (Drawing) | 500 mm (19.69 in) |
| Overall Height (Drawing) | 1900 mm (74.80 in) |
| Height Dimension (Drawing) | 1800 mm (70.87 in) |
Electrical
| Voltage | 230V (short description); 115 V (long description) |
Identifiers
| UPC | 623980720517 |
| UNSPSC | 40101802 |
| Part Number | PWS7702A230N4LG |
| Drawing Number | 30230-007_01-A |
Installation
| Door Contact | Door contact switch recommended to turn the unit off when the enclosure door is opened |
| Mounting Style | Bolt-on unit for door or side mounting on electrical panel enclosures |
| Drilling Template | PWS 7702SL |
| Cooling Water Hose | Flexible pressure-resistant (>10 bar) hose secured with clamps |
| Supply Voltage Tolerance | Within ± 10% of the ID plate value |
| Supply Frequency Tolerance | Within ± 3 Hz of the ID plate value |
| Insulation Strip Compression | 2 mm (approx. 0.080 in) |
| Coolant Temperature Requirement | Cooling liquid must be at least 10 C colder than the heat exchanger inlet air temperature |
| Maximum Permissible Operating Pressure | 10 bar |
Cooling Performance
| Cooling Capacity (Part Description) | 34200 BTU/H |
Packaging & Shipping
| Included Items | Cooling unit, mounting cutout, manual, technical data sheet |
| Shipping Weight | 188 lbs (85.28 kg) |
| Accessory Pack (Typical) | Sealing strips, threaded mounting studs, mounting bolts, nuts and washers, condensate hose, door contact connector/jumper |
Construction & Finish
| Colour | Lt. Gray |
Environmental & Protection
| Freezing Conditions | Water circuit must be completely emptied with compressed air before storage or transport below freezing |
| Storage Temperature Limit | Must not be exposed to temperatures exceeding +70 C |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Enclosure Rating (Part Description) | NEMA 3R/4 |
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Frequently Asked Questions
Is the PWS7702A230N4LG a 115 V or 230 V unit?▾
The part number and short description (AIR WATER EXCHANGER 230V) indicate 230 V, but the long description reads 115 V. Check the unit ID plate, which carries the nominal operating voltage, before connecting power.
What is its cooling capacity?▾
The part description rates it at 34200 BTU/H.
How big and heavy is it?▾
The drawing shows an overall height of 1900 mm (74.80 in) and a width of 500 mm (19.69 in). Shipping weight is 188 lbs (85.28 kg).
What water temperature does it need?▾
The PWS Series manual states the cooling liquid supplied to the air/water heat exchanger must be at least 10 C colder than the heat exchanger inlet air temperature for the unit to function correctly.
What is the maximum water pressure?▾
The manual gives a maximum permissible operating pressure of 10 bar and calls for flexible pressure-resistant (>10 bar) hose secured with clamps on the cooling water connection.
What comes in the box?▾
The manual lists the cooling unit, a mounting cutout, the manual and a technical data sheet. The PWS Series accessory pack typically includes sealing strips, threaded mounting studs, mounting bolts, nuts and washers, a condensate hose and a door contact connector/jumper.
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