Electronic Mains Cold Water Top-Up Controller
Automatic mains water top-up for rainwater tanks with leak detection feature and pump dry-run protection.
This unit is primarily designed to work with automatic pumps, i.e. pumps which measure pressure and flow and start and stop themselves. TCA7000 is not a pump pressure switch and won’t control a basic manual pump. It will isolate a pump to prevent dry-running and the need to re-prime. If you are in any doubt, please consult a professional. Your supplier can advise you.
Features
- Microprocessor Controller
- For use with automatic pressure controlled pumps, or with separate pump pressure switch
- 20 metre Probe Cable, up to 100m Available
- Solenoid valve 1/2” BSP, optional up to 2” BSP
- Float switch option instead of sensor probe
- Solid State Level Sensing (Conductivity)
- Limits Top-up Duration to Prevent Accidental Wastage
- Optional Pump Isolation During Top-up
- 15 Modes to suit all tank sizes
- Self-test mode for faster install/commissioning
- Adjustable top-up overfill delay
- Adjustable top-up timeout alarm
- Automatic Anti-Blocking System (ABS) to avoid solenoid valve
Included
- TCA7000 Control Unit
- Level Probe - 20m cable (other lengths available).
- Solenoid Valve - with 30cm braided hose and isolating valve (1/2“ F BSP).
- Tundish with overflow c/w wall mounting bracket, and elbow.
Operation
The Level Probe is suspended in the rainwater tank at the required minimum level. When the water surface falls below this level a solenoid valve supplies mains water to the tank until the probe is immersed again. A top-up overfill delay can be set to ensure a fixed amount of additional water is added to avoid frequent activation.
TCA7000 provides an optional pump power connection. If the pump is connected this way TCA7000 will switch it off at low water level to prevent the possibility of dry-running as well as starting the top-up cycle. Any single phase pump of up to 10 amps can be connected to the front socket of the controller. The pump will re-activate when the probe becomes immersed, while also enforcing a maximum of 20 restarts per hour to optimise motor cooling. Note that this will not prevent an automatic pump which been incorrectly installed from overheating but will avoid overheating due to excessive power cycling if the top-up overfill delay is set to 0 and cycling of the top-up function and hence pump isolation occurs rapidly.
Unlike electromechanical systems, microprocessor control provides multiple settings for optimal supply of water with safeguards against over-run in the event of a component or tank failure.
Settings
- Top-up overfill duration 0-240 minutes
- Time-out alarm duration 30-240 minutes + disable
An Anti-Blocking action is performed after every 3 days of solenoid valve inactivity. This reduces the likelihood of the solenoid valve becoming seized due to limescale or
other factors.
If the top-up cycle exceeds the selected top-up timeout alarm, an alarm will show and the unit will halt operation until reset. This is vital to meet both water company requirements and avoid undue costs.
Includes a Tundish with unique integrated overflow to meet the requirements of BS EN13076.
Specification
Control Unit | |
Dimensions | 55 x 171 x 121mm |
Weight | 0.5kg |
Enclosure Material | ABS |
Ingress Protection | IP65 |
Supply Voltage | 230/240VAC 50Hz |
Power Consumption (Standby) | 5 Watts |
Pump Power Outlet | 230/240VAC 10A |
Electrical Insulation | Class 2 |
Electromagnetic Immunity | BS EN 50082-1 |
Electromagnetic Suppression | BS EN50081-1 |
Level Probe | |
Type | Conductivity |
Voltage | 15vdc |
Cable Length | 20m |
Probe Material | Stainless Steel |
Solenoid Valve | |
Type | Servo Assist |
Size | 1/2” |
Fluid Connections | 1/2” FBSP |
Voltage | 230-240VAC |
Power Consumption | 5.5VA |
Mounting Orientation | Any |
Fluid Type | Clean Water |
Operating Temperature | 2 to 40c |
If your query is related to an existing order please email in with your order number in the subject line. If you have a new residential enquiry please consult the online guides before calling as they may answer your question.
The delivery information page is divided into 1. Specific and 2. General delivery information below.
1. Specific Delivery Information relating to product lines- Small items dispatched daily with RM24 ~85% arriving next day
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We're a Manchester based company and ship to the UK at our standard rates. Please get in touch requesting the delivery surcharge value if you are based in the Highlands or a UK island.
We no longer support ordering from the EU and Northern Ireland through the website. We can support ad hoc orders with limited liability.
Our design and Prestige range is available in the Netherlands, Ireland, Belgium, France, Germany, through our distributors.
Stock items will be dispatched on the day of order, if ordered before 1pm.
Letters are sent 1st class.
Parcels <2kg are shipped with Royal Mail 24 Tracked with the following target delivery times.
Guaranteed delivery can be arranged by advance agreement. This agreement is back to back with the courier and we will not be liable for any delays as per our terms.
A loss/replacement can only be pursued in line with the target delivery times of the courier or once the courier accept loss.
Bulky items (and pallet deliveries) are dispatched within 2-15 working days. We will request a contact number if this has not been provided at checkout.
Some items are made to order (bespoke) and details are given on the listing for dispatch times. If for any reason we anticipate a delay on our normal dispatch time we will contact you to let you know.
Occasionally there are delays. We shall not be liable for any direct or indirect losses, costs, damages or expenses incurred by you or any other person for any delays in delivery.
Missed deliveries where attempted delivery has been made usually result in re-deliveries the following day. The customer is responsible for organising re deliveries by contacting the courier direct.
Parcels/deliveries can only be "left out" if the delivering company allows that option. Parcelforce, for example, do not allow a parcel to be "left out".
We are an environment centric business and as such we try to minimise our waste. Our packaging is usually recycled and/or recyclable and we make efficient use of packaging to minimise wastage.
Covid delivery updates between 12.3.20 and 11.1.21 21 have been archived here.