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Resideo L8148E1299 Aquastat Relay W/50VA Transformer

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Special Price $357.47 Regular Price $396.79
In stock
SKU
L8148E1299
The Resideo L8148E1299 Aquastat Relay with a 50VA Transformer is an essentialpart of the control of hydronic heating systems. This relay is a line voltage type of circulator control relay and is used to supply low voltage power and also to control the limits of the system. The unit has SPST switch and 4-1/2” capillary for accurate temperature measurement and control. With 120 VAC, the L8148E1299 Aquastat Relay has a differential temperature of 15 °F that helps in controlling the temperature of the system effectively. It can take pressure up to 255 PSI, and this makes it ideal for use in different demanding operations.
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HVAC Controls & Electrical, Transformers
Manufacturer:
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Specifications

  • Application: Line Voltage Circulator Control and Low Voltage Power Supply and Limit Control
  • Mounting Type: Vertical Mount
  • Voltage: 120 VAC
  • Switch: SPST
  • Capillary Length: 4-1/2"
  • Differential Temperature: 15°F
  • Pressure: 255 PSI
Manufacturer Name: Resideo
Product Number: L8148E1299
OEM Part Number: L8148E1299
Product Description: Aquastat Relay,W/50Vatrans.
Weight:3.94lbs/1787.15g

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Product Questions (2)
Customer Questions
What maintenance is required for the Resideo L8148E1299 Aquastat Relay?

Inspect wiring connections and tighten terminals periodically to ensure accurate operation. Keep the relay and transformer free from dust and moisture buildup. Verify temperature sensing accuracy and confirm proper switching. Replace worn contacts promptly to maintain safe heating control performance.

What are common issues with the Resideo L8148E1299 Aquastat Relay?

  • Relay fails to switch due to worn or burnt contacts.
  • Inaccurate temperature sensing leading to improper system cycling.
  • Loose or damaged wiring causing intermittent operation.
  • Relay coil failure resulting in no system response.

Installation Steps

Step 1: Turn off power and confirm unit is de-energized.

Step 2: Mount relay on junction box securely.

Step 3: Wire line voltage and low voltage per diagram.

Step 4: Connect thermostat and circulator leads correctly.

Step 5: Tighten all terminals and ensure grounding.

Step 6: Restore power and test temperature control.