Lochinvar INS7141, MP2, INS7162, TST2313 General, Ac Power, Boiler Demand, DHW Demand

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INSTALLATION

￿CAUTION

Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury. It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic control is not intended for uses as a primary limit control. Other con- trols that are intended and certified as safety limits must be placed into the control circuit. Do not open the con- trol. Refer to qualified personnel for servicing. Opening voids warranty and could result in damage to the equip- ment and possibly even personal injury.

STEP ONE ----- GETTING READY

Check the contents of this package. If any of the contents listed are missing or damaged, please contact your whole- saler or Lochinvar sales representative for assistance.

MP2 includes: One Boiler Control MP2, One Outdoor Sensor TST2311, Two Temperature Sensors TST2313, Instruction Manuals INS7141 and INS7162

Note: Carefully read the details of the Sequence of Operation to ensure that you have chosen the proper con- trol for your application.

￿STEP TWO ----ROUGH-IN WIRING

All electrical wiring terminates in the control base wiring chamber. The base has standard 7/8" (22 mm) knockouts which accept common wiring hardware and conduit fittings. Before removing the knockouts, check the wiring diagram and select those sections of the chamber with common volt- ages. Do not allow the wiring to cross between sections as the wires will interfere with safety dividers which should be installed at a later time.

Power must not be applied to any of the wires during the rough-in wiring stage.

All wires are to be stripped to a length of 3/8" (9 mm) to ensure proper connection to the control.

If an Outdoor Sensor TST2311 is used, install the sensor according to the installation instructions in the INS7141 and run the wiring back to the control.

Install the TST2311 sensor according to the installation instructions in the Data Brochure D 070 and run the wiring back to the control.

If a TST2311 sensor is used, install the sensor according to the installation instructions in the Data Brochure D 070 and run the wiring back to the control.

Run wire from other system components (pumps, boilers, etc.) to the control.

Run wires from the 115 V (ac) power to the control. Use a clean power source with a 15 A circuit to ensure proper operation. Multi-strand 16 AWG wire is recommended for all 115 V (ac) wiring due to its superior flexibility and ease of installation into the terminals.

STEP THREE ----- ELECTRICAL CONNECTIONS TO THE

CONTROL

General

The installer should test to confirm that no voltage is pres- ent at any of the wires. Push the control into the base and slide it down until it snaps firmly into place.

POWERED INPUT CONNECTIONS

115 V (ac) Power

Connect the 115 V (ac) power supply to the Power L and Power N terminals (10 and 9) (FIG. 26). This connection provides power to the microprocessor and display of the control. As well, this connection provides power to the Prim P1 terminal (11) from the Power L terminal (10).

Boiler Demand

To generate a boiler demand, a voltage between 24 V (ac) and 230 V (ac) must be applied across the Boil Dem and Com Dem terminals (6 and 7) (FIG. 26).

DHW Demand

To generate a DHW Demand, a voltage between 24 V (ac) and 230 V (ac) must be applied across the Setp / DHW and Com Dem terminals (8 and 7) (FIG. 26). If using DHW, the last boiler in MODE 1, 4 or 5 must be set to OFF and DHW MODE must also be set to 1 through 4.

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Contents Additional Functions Include Installation InstructionsTable of Contents Display Section a General Operation Boiler Reset Stand AloneDomestic Hot Water Set PointBoiler Alarm AlarmCombustion Air C. a Fixed Lead RotationResetting the Running Times Resetting the Rotation SequenceSection B Staging Operation ModeLo / Lo Fire DelayLo / Hi Med Section C Pump OperationFixed Differential Auto DifferentialBoiler Pump Purge Section D Boiler Reset OperationType of terminal unit. This improves the control of the air High Mass Radiant DHW Demand Section E Domestic HOT Water OPERA- TionDHW Mode 4 DHW in Primary / Secondary with Priority Section F SET Point Operation Section G External Input Operation Setp Mode 1 Setpoint in ParallelDc or 4 20 mA Dc or 0 20 mAGeneral Ac PowerBoiler Demand DHW DemandSet Point Demand Combustion Air / Alarm Contact C.A./AlarmExternal Input 0 10 V dc Primary Pump Contact Prim P1Relay 9 / DHW UnOccupied SwitchBoiler Return Sensor Boiler Supply SensorExternal Input Primary Pump Prim P1 Combustion Air or Alarm C.A. / AlarmGeneral Cleaning the ControlRotate / OFF Page Page Page DHW Mode Stage DelayBoiler Minimum Boiler MaximumThis item is only available when DHW Mode is set to OFF Testing the Control Error Messages Is not a safety limit control Technical DataTypical Boiler Installation Typical Boiler Installation Typical DWH Priority Heating Package System