🔥 Stay warm, stay smart — the ultimate relay for flawless radiant heating!
The Azel SP-82 is a robust two-zone switching relay designed for hydronic radiant floor heating systems. Featuring LED indicators, screwless terminal blocks, and field-selectable priority with timer, it ensures efficient boiler operation and freeze protection. Compatible with cold start and tankless coil boilers, it includes fuse protection, a high-capacity replaceable transformer, and comes with an extended 3-year warranty for reliable, long-term performance.
| Manufacturer | Azel Technologies Inc. |
| Part Number | SP-82 |
| Item Weight | 0.01 ounces |
| Product Dimensions | 6.5 x 6.5 x 2.8 inches |
| Item model number | SP-82 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |
S**B
Good quality
Works great.
D**B
Isolated end switch terminals are moved to the top on the newer version of the SP-83 board
The unit (SP-82, they use SP-83 main board for those units) worked fine for 7+ years (came with the house). When it failed one of the relays was buzzing (not sure which one). I powered the unit off and on. The buzzing stopped, but relay on the front panel board started clicking (1-2 clicks/sec). I decided to replace.The replacement went well, but beware, the terminals marked "ISOLATED END SWITCH" (24v, going to boiler control) are now at the top of the device. The "SYS PUMP" terminals (120v) ended up in their place at the bottom (if counting from left to right).When replacing the unit I connected the wires as they used to be and ended up with 120v fed to the boiler control. The 15A circuit breaker tripped, but fortunately there was no permanent damage and everything worked ok after reconnecting it the new way.
J**.
Five Stars
good product
C**Y
replaced same model
was a direct swap, the transformer in the old started to buzz and it was only time before it would of failed. works great on the 2 zones of in slab radiant heat we have in our auto shop.
G**
Good device and working
This is a good device and is working as advertised. Easy wiring diagram inside
Trustpilot
2 days ago
1 week ago
