User manual TJERNLUND HS3,4,5 WITH UC1 UNIVERSAL CONTROL (VERSION X.06) 8504111 REV C 0705

[. . . ] TJERNLUND PRODUCTS, INC. 1601 Ninth Street · White Bear Lake, MN 55110-6794 PHONE (800) 255-4208 · (651) 426-2993 · FAX (651) 426-9547 Visit our web site · www. tjernlund. com IMPORTANT!!!UC1 BOARD VERSION X. 06 UPDATES NEW X. 06 VERSION UC1 BOARD FEATURES IMPORTANT: This upgraded circuit board features: A new #6 power LED Constant red when 115 VAC is supplied to L & N. A new color for the #2 LED Constant blue when fan prover safety circuit is closed. A revised #5 LED With no call for heat present, flashes 3 seconds on / 3 seconds off if microcontroller is working properly. New LED # 6 RED 115V power supplied to UC1 L & N terminals P1 P2 C GND F LED 6 (RED) POWER LED (1 9) LED # 2 now BLUE (previously GREEN) LED # 5 RED With no call for heat, flashes 3 seconds on / 3 seconds off if microcontroller is working properly. LED 1 (AMBER) LED 2 (BLUE) LED 3 (GREEN) LED 4 (RED) LED 5 (RED) DRY 24 V 115 V J1 J2 XL XN N M MTR APPLIANCE INTERLOCK RELAY VENTER MOTOR RELAY AB 1 2 3 4 LN IMPORTANT: For 950-8804 UC1 Replacement Board Kits: If this is a 950-8804 UC1 board kit and you are replacing an existing UC1 board with this new board, note Dip Switch settings on existing UC1 circuit board so that those same settings can be positioned on this replacement circuit board. [. . . ] After draft is established, the Fan Proving Switch closes within 5 to 10 seconds energizing terminal "4", which completes the circuit allowing burner to fire. NOTE: If a Venter pre-purge is selected, the burner will not fire until the pre-purge time is finished. The Venter will continue to run after the burner has finished firing for the set post-purge time cycle. The UC1 is set for a 2 minute post-purge time period from the factory. The "1" input terminal on the UC1 can accept either a 24 VAC or 115 VAC control signal. IMPORTANT: The RED voltage jumper must be positioned based on appliance interlock voltage 24V or 115V. If using the "DRY" contact activation method, use terminals A & B on UC1 control and position the RED voltage jumper tab in the "DRY" position. Multiple appliance interlocks require the use of our MAC-Series multiple appliance controls. The steps listed under each diagram are intended as a supplement to the diagram. If you are unable to wire per these instructions, call Tjernlund's Technical Service toll free at 1-800-255-4208 for assistance. IMPORTANT: If the call for heat interlock signal or 115 VAC power is removed, the UC1 board will reset and any fault, if present, will be stored in memory instead of displayed. 8 UC1 UNIVERSAL CONTROL WIRING SCHEMATIC The Ground lead, Venter motor and Fan Prover leads are factory connected to the UC1 circuit board. Venter Ground, motor and Fan Prover wiring connections are made at the free end of the 2 foot whip. As viewed from the opposite end of the shaft (rear of motor), the motor should rotate clockwise. See motor nameplate for proper rotation. LEGEND: 115 VAC 5 VDC BOARD-GENERATED POWER DO NOT SUPPLY POWER!24 OR 115 VAC TERMINAL 1: 24 OR 115 VAC INTERCEPTED CALL FOR HEAT TERMINAL 2: INTERCEPTED CALL COMMON OR NEUTRAL TERMINAL 4: APPROVED CALL BACK TO HEATER DO NOT SUPPLY VOLTAGE TO "A" OR "B". USER-PROVIDED CALL SWITCH "DRY" INTERCEPTED CALL FOR HEAT OR LINE / HOT COMMON / NEUTRAL J2 J1 XL NO IMPORTANT: RED JUMPER POSITION MUST BE THE SAME AS APPLIANCE INTERLOCK VOLTAGE. LED5 LED4 LED3 LED2 LED1 LED6 115V DRY CALL JUMPER COM 24V RED POWER LED APPROVED CALL SUPPLY 115 VAC 50/60 Hz R INTERLOCK RELAY K1 RED RED BLUE XN K2 N OPEN PROVER OPTION (9) GREEN PRE-PURGE SETTINGS (1 - 2) POST-PURGE SETTINGS (3 - 8) AMBER P2 P1 PROVER C GND F FOR TJERNLUND MAC1E OR MAC4E AUXILIARY DEVICES. DOING SO WILL DAMAGE THE CONTROL. ON 123456789 9183006 TJERNLUND PRODUCTS, INC. VENTER MOTOR 1 H. P. MAX @ 115 VAC COM WARNING: Disconnect power supply from the UC1 and heating equipment when making wiring connections and servicing the Venter. Failure to do so may result in personal injury and/or equipment damage. WIRING CONNECTIONS FROM UC1 TO FAN PROVER AND VENTER MOTOR WIRING CONNECTIONS FROM UC1 UNIVERSAL CONTROL AND MOTOR MADE IN FAN PROVER JUNCTION BOX The UC1 has a 2 foot whip that contains a ground lead and the leads to power the Venter motor and connect to the Fan Prover. If it is desirable to mount the UC1 more than 2 feet from the Fan Proving Switch an additional electrical junction box and appropriate length of conduit will be necessary. [. . . ] IMPORTANT: After continuity check push dip switch #9 back down to "activate" Pre-Cycle Fan Prover status check. No, continuity is not present: Confirm that burner is not firing at capacities or temperatures exceeding Venter limits. Check for excessive vent pipe runs, elbows directly on venter discharge, high winds, plugged / kinked Fan Prover sensing tube or a faulty Fan Prover switch. IMPORTANT: Do not connect 5 foot section of aluminum tubing directly to Venter housing. [. . . ]