The SALUS Wireless Pump Relay Controllers are devices that communicate with wireless thermostats and receivers to control traditional heating pumps and boilers, and provide the following functions and features: FEATURES: Primary pump control Priority zone support (domestic hot water) Purge –Priority pump continues to run for 2 minutes after end of priority call Exercise – pumps turn ON for 30 sec. after 72 hours of inactivity Thermostat grouping ZC/ZR boiler enable support Wireless boiler XX support with a Zigbee Receiver (AX10RF) XX and AUX normally open contacts support Master / Slave function for up to 5 units (1 master / 4 slaves) External Antenna for sheltered locations LED indicators for zones and Priority status 3 models: AKL01PRF–single-zone AKL04PRF– 4 zone AKL06PRF– 6 zone === DOCUMENTS: Spec Sheet Install Guide (EN) Install Guide (FR)