Does this heater pack require specific relay series

supporting a maximum operating pressure of 667 psig (46 bar)

This component is a direct OEM replacement for Rheem

utilizing extruded aluminum for the frame and blades to ensure rigid structural integrity and low-leakage performance

Siemens Building Technology MXG461.25-8.0U Valve L99H008 Does this heater pack requireProfessional grade hydronic control requires high precision, and the Siemens MXG461. 25 8. 0U delivers with a 1 inch NPT magnetic control valve designed for rapid response in closed circuit systems. This modulating magnetic control valve features a 9. 3 Cv flow coefficient and is expert engineered for chilled water or low pressure hot water applications where temperature stability is critical. With a positioning time of less than two seconds and 1000: