B01-Attachment 11-Russells Relay Board Schematic.jpg

This is a technical schematic drawing of a relay board component for the RI MICRISTAR system. The document is sheet 2 of 5 from job number T-073100-A and was drawn by JS, with the drawing number 29009300A from Russells.

The relay board contains 16 relay positions organized in two columns. The left column includes relay positions 9 through 11 and TP-1 (time proportioning cooling), while the right column includes relay positions 12 through 16 and TP-2 (time proportioning heating). Each relay position is labeled with corresponding events (Event #1 through Event #8). The board features terminal connections on both the left and right sides, with markings indicating NC (normally closed), NO (normally open), and Φ (phi) symbols representing contact configurations. Relay position 10 includes a note indicating a set point alarm at 4,500 OFF. Two terminal points (TP-1 and TP-2) at the bottom of the schematic show three-position contact arrangements with NC, Φ, and NO designations. A note indicates that an event relay will be supplied for customer use.