DIFFERENTIAL THERMOSTAT SOLAR WATER HEATING PUMP CONTROLLER
DCV-1903R1 version 2 - Prewired version

Differential controller for swimming pool solar hot water system Variable -

Can also be used for hot tubs, drain back solar hot water systems and solar heated outside showers etc.

** Each of these Differential Controllers are built with quality components and are thoroughly checked and tested before shipment.
 For other 12vDC models click the links below:
https://www.ebay.co.uk/itm/265791041547 - 12vDC Variable terminal blocks
https://www.ebay.co.uk/itm/265769714228 - 12vDC Non variable 20°C fixed differential

For other 250vAC/DC models click the links below:
 https://www.ebay.co.uk/itm/265769733540 - Variable prewired
https://www.ebay.co.uk/itm/265769726518 - Variable terminal blocks
Specifications:

Feed voltage: 12vDC 

Output: 12vDC

Manual override switch to turn on the pump at any time and at any temperature

Temperature range: from 0°C to 90°C (32°F to 194°F)

Differential controller dimensions - 85x50x21mm (3.35x1.97x0.83 Inches)

Led indication when operating

Differential range: Approx.+5°C (41°F) and +50°C (122°F)
HS Code: 85423190

Supplied with 2x waterproof sensors

Operation:

Whenever hot water sensor is measured to be hotter than the cool water sensor by the setting of the differential preset, the differential pump controller switches on which then supplies power to a water pump and led comes on. The output remains on, until the measured temperature difference between the two sensors has fallen to below the setting of the differential preset

For example:

The hot sensor can be located on the output of a solar panel, the cool sensor can be located in the water or on a water pipe of a swimming pool/hot tub etc.

In this way when water in the solar panel is hotter than the pool/hot tub water by the setting of the preset - the water pump will switch on.

The differential temperature is set by turning the differential preset with a crosshead screwdriver as shown is the photos.

Please note: solar panels can and often do reach temperatures of about +70°C (158°F) when the sun is shining which can give an approximate output water temperature of between +30°C (86°F) and +60°C (140°F)...and perhaps more!

The differential pump controller also has a manual override switch which can turn the pump on at any time and at whatever temperature.

Information: Model DCV-1903R1. These differential pump controllers are batch processed for quality.

Current version number is 3.  (DCV-1903R1.2)

Package content:

1x Differential pump controller (Model DCV-1903R1 version number dependant on release)

2x waterproof sensors with wire lengths of 25cm - (the wire can be extended up to 15 Metres/50 feet)

wiring diagram and user manual (English)

Additional items required:

12vDC water pump 

12vDC power supply >= 2A 

 

   Auction notes and Seller's payment instructions

Important Auction Notes: 
 

Your purchase is a contract - You will enter into a legally binding contract to purchase the item. Purchase the item ONLY if you're serious about buying the item.
If the seller is unable to establish contact with the winning bidder within 3 days of the end of the auction or if payment is not received within 5 days, we will cancel the auction, the bidder shall be reported to eBay and the seller will file an Unpaid Item Dispute against the bidder.

Payment Instructions:

Please only bid if you intend to complete the purchase.

 The package will only be delivered to the delivery address on the eBay account

Proof of despatch is always obtained.

Estimated Delivery Times:

UK and most European countries: Approx. 7-15 Days

Outside of Europe: Approx. 21-55 days

International Buyers - Please Note:
Import duties, taxes and charges are not included in the item price or shipping charges. Unfortunately it is the responsibility of the buyer if these charges are payable.

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