What Is a Dishwasher Timer Relay? Types and Selection Criteria
A dishwasher timer relay runs the wash, pause and rinse steps of a commercial dishwasher in sequence with set times.
A dishwasher timer relay is a timer relay that runs the wash, pause and rinse steps of one wash cycle in a commercial (hood-type or undercounter) dishwasher in sequence with set times. It controls the wash pump and the rinse valve or pump through its output contacts, via contactors and valves. It is used in the control panel of restaurant, hotel and canteen machines; a faulty relay is replaced with a model that has the same operating sequence.
Operating sequence
- Wash: The wash pump runs for the selected time.
- Pause: A short pause lets the wash water drain.
- Rinse: Rinse water is supplied for the set time and the cycle ends.
Models in the catalog
| Model | Wash time | Pause | Rinse | Extra information in the product data |
|---|---|---|---|---|
| Entes ERB-50 | 30, 60, 90, 120, 180 s (selectable) | 3 s (fixed) | 1–30 s (adjustable) | Relay output 8 A, 2000 VA |
| Tense TBM-50DIN | 5 steps | See datasheet | 1–30 s (adjustable) | 220 V AC, classic DIN housing |
| Tense TBM-53B | 5 steps | See datasheet | See datasheet | 220 V AC, classic DIN housing, audible alarm (buzzer) |
Selection criteria
- Sequence and times: The new relay's wash steps and rinse range must suit the machine's program. Note the old relay's model and settings before changing it.
- Supply: The Tense models in the catalog run on 220 V AC, 50–60 Hz; check the control circuit voltage.
- Output load: The pump motor and heater are connected through a contactor, not directly to the relay contact. The Entes ERB-50 output is rated 8 A and 2000 VA; valves and contactor coils must stay within this limit.
- Wiring diagram and housing: Terminal layouts differ between brands. When replacing, compare the housing type and wiring diagram with the old relay.
- Audible alarm: To signal the end of the cycle to staff, the Tense TBM-53B with buzzer can be chosen.
Common mistakes
- Running the pump directly from the relay contact: The contact burns out at the motor's starting current.
- Removing the wiring without photographing it: On a relay of another brand the terminal numbers do not match and the cycle runs in the wrong order.
- Setting the rinse time too short: Detergent residue remains; use the time recommended by the machine manufacturer.
Dishwasher timer relays at Welibaba
The Dishwasher Timer Relays category has 3 active products, all listed with prices: Entes ERB-50, and Tense TBM-50DIN and TBM-53B. Other timer relays are in the Timer Relays category and explained in the timer relay guide.
Frequently asked questions
What does a dishwasher timer relay do?
It runs the wash, pause and rinse steps in sequence with set times; the operator only starts the cycle.
Can a relay of another brand be fitted?
Yes, if the sequence, time ranges, supply voltage and number of outputs are the same; reconnect it by comparing the wiring diagram with the old relay.
How is the wash time chosen?
By how dirty the dishes are and by the machine manufacturer's recommendation. The Entes ERB-50 offers 30, 60, 90, 120 and 180 seconds.