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Lennox 13H28 Transformer 208V-PRI 24V-SEC 70V

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Special Price $71.85 Regular Price $82.63
In stock
SKU
13H28
The Lennox 13H28 Transformer is a primary component that steps down primary voltage of 208V to secondary voltages of 24V, 70V in HVAC systems. This transformer is mainly applied in different heating and cooling equipment to supply power to control circuits and other low voltage devices. The 13H28 Transformer reduces the voltage to safe levels needed to operate sensitive control systems without the risk of short-circuiting. It comes with a robust construction that guarantees efficiency of the operation, in addition to offering safeguard to HVAC equipment from fluctuations in voltage as well as other electrical spikes.
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HVAC Controls & Electrical, Transformers
Manufacturer:
https://www.partshnc.com/media/catalog/product/1/3/13h28_1.jpg

Specifications

  • Measure:Unit
  • Depth: 3 Inch
  • Height:3.06 Inch
  • Width: 3.16
  • Frequency :50/60 hz
  • Mount Type:Mount Type
  • Primary Voltage: 208/240 VAC 60 Hz
  • Secondary Voltage: 24 VAC
  • Protection Type: 3.5 Amp Circuit Breaker
  • Connection Type:Leads
  • Max VA Rating:70 VA
  • Weight:2.44lbs
Manufacturer Name: Lennox
Product Number: 13H28
OEM Part Number: 13H28
Product Description: 208V-Pri 24V-Sec 70Va Transfor
Weight:2.44lbs/1106.76g

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Product Questions (2)
Customer Questions
What maintenance is required for the Lennox 13H28 Transformer?

The transformer should be inspected periodically for loose wiring, overheating, and insulation wear. Ensure terminals are tight and free from corrosion. Keep the unit clean and dry to prevent electrical faults and maintain better, stable operation.

What are common issues with the Lennox 13H28 Transformer?

  • Overheating due to poor ventilation or overload.
  • Voltage output fluctuation causing inconsistent performance.
  • Loose or corroded terminals leading to intermittent connection.
  • Insulation breakdown causing short circuits or noise.
  • Core hum from electrical stress or unstable input supply.

Installation Steps

Step 1: Turn off all power at breaker and verify no voltage present.

Step 2: Remove old transformer and label all wires before disconnecting.

Step 3: Mount new transformer securely to bracket or panel enclosure.

Step 4: Reconnect primary and secondary wiring according to wiring diagram.

Step 5: Restore power and test output voltage for proper operation.

Step 6: Ensure proper grounding and tighten all terminal connections.

Step 7: Replace cover, then restore power and verify system operation safely.