LP920A-D Temperature Controllers Service Data General Description The LP920 1s 4 single: imperative, High-capacity pneumatic controller with direct or reverse action The LPI20A and B models; with baud filled element. control dampers:and valves: VAC systems, regulating air and liquid temperatures, The LPU20C and D Zero Energy Band models were designed for control of sequenced heating/cooling unit ventilators and fan coil units.
Operation General NAE: Refer ia Figure 10.0 the: Pans and Accessories section for view of the HELPING: The POO operates in three phases. 1 senses the temperature: Being Honored, Seeks 10 breakneck its internal Tevet system, dnd aide As pio pressure Wo Connie radiance the rain lever force. This resists in a readjustment of the branching output pressure. and the controller device.
Limit Controller (LP20A 3nd B Only) L Set he planetary Cone oles 0 supply fill MEP 6 the gerontological: 2: Proceed asi in primary controller above. Adjustments and Calibration Scale plate Adjustment The LIVIA and B ase shipped with: the Fahrenheit side of the Scale plate displayed. Tor Celsius conversion: 1... Remove the two screws that hold the Scale plate (Fig. 5).
Repair NOTE: After each repair procedure 15 completed, perform an operational check: Filter Replacement Removes three screws (Fig. 8) holding Connector Plate Assembly. Remove Connector Plate Assembly: Remove and discharge Gasket and Filter Assembly. 2 install new: 14001865-001 Filter Assembly an 14003655:001 Gasket: ¥
BEND TABS (4) FAHRENHEIT SIDE SHOWING LPB20A and B LPa20C and D 10012 14.16 8 9 a5] 13:0:15 17 Boone fee 2a oe fore 30:29 2523 LP920 Direct Acting Cutaway CASE Fig. 10: (Part 1 of 2). L920 Reservists Bulb Temperature Controller.