ESi ESRTP4+ Wired Programmable Room Thermostat with OpenTherm Sensor Ramses II & III RF

Ramses II & III RF protocol — backwards compatible with existing Honeywell Home RF products including BDR91A

Stainless Steel Heat Exchanger

Specification Value Part Number 11007327 Compatibility All SuperStream accumulators (Acc130–Acc450) Quantity Required One per additional accumulator (after first unit with Upstream Kit) Materials High-quality brass (WRAS-approved) Included Components Vessel connector

ensuring fast recovery and energy savings

The three-phase system is achieved by distributing units evenly across L1

ESi ESRTP4+ Wired Programmable Room Thermostat with OpenTherm Sensor Ramses II & III RFThe ESi ESRTP4+ is a wired programmable room thermostat that combines time and temperature control in a single wall mounted unit, without a separate RF receiver to install. It provides the same core energy saving intelligence as the wider ESi programmable range, including Chronoproportional Control (TPI), Delayed Start, Optimum Start, and Optimum Stop, alongside an OpenTherm interface for compatible boilers. Wired directly into the heating circuit via