Lochinvar INS7141 Installation Instructions Manual

Supply water temperature controller

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INTRODUCTION

The MP

is capable of controlling the supply water tempera-

ture for up to nine ON / OFF stages based on outdoor tem-

perature, control for the Domestic Hot Water (DHW) gener-

ation, a set point requirement or optionally an external input

signal (0 - 10 V (dc)). A large easy to read display provides

current system temperatures and operating status (FIG. 1).

The control has outputs for a primary pump and a combus-

tion air damper or alarm. Based on the mode of operation

selected, the control can operate different combinations of

boiler stages and boiler pumps.

INSTALLATION INSTRUCTIONS

ADDITIONAL FUNCTIONS INCLUDE:

• Installer and Advanced Access Levels

• Primary Pump Output

• Individual Boiler Pump Outputs (in applicable

modes)

• Pump Exercising

• Pump Purging (primary and boiler)

• Boiler Demand for Space Heating Loads

• DHW Demand for DHW Loads

• Set Point Demand for Set Point Loads

• Test Sequence to Ensure Proper Component

Operation

• Setback Input for Energy Savings

• 0 - 10 V (dc) Input Signal

Modes

1 Up to 9 On/Off Boilers

2 Up to 4 On/Off Boilers & 4 Pumps

3 Up to 4 Lo/Hi Boilers

4 Up to 3 Lo/Hi Boilers & 3 Pumps

5 Up to 3 Three Stage Boilers

6 Up to 2 Three Stage Boilers & 2 Pumps

7 Up to 2 Four Stage Boilers

8 1 Four Stage Boiler & 1 Pump

INS7162 Rev-

FIG. 1

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Summary of Contents for Lochinvar INS7141

Page 1: Installation Instructions
INSTALLATION INSTRUCTIONS INTRODUCTION The MP is capable of controlling the supply water tempera- ture for up to nine ON / OFF stages based on outdoor tem- perature, control for the Domestic Hot Water (DHW) gener- ation, a set point requirement or optionally an external input signal (0 - 10 V (dc)).
Page 2: Table Of Contents
This instruction manual is organized into four main sections: 1) Sequence of Operation, 2) Installation, 3) Control Settings, and 4) Testing and Troubleshooting. The Sequence of Operation section has seven sub-sections. We recommend reading Section A: General Operation of the Sequence of Operation, as this contains important informa- tion on the overall operation of the control.
Page 3: Display
DISPLAY FIG. 2 SYMBOL DESCRIPTION FIG. 3...
Page 4: Sequence Of Operation
DEFINITIONS The following defined terms and symbols are used through- out this manual to bring attention to the presence of hazards of various risk levels, or to bring attention to important infor- mation concerning the life of the product, see Figure 4 below.
Page 5 OMBUSTION IR OR LARM The control has an isolated contact that can be used as either a combustion air damper contact or an alarm contact. This selection is made using the C. A. / Alarm DIP switch. Combustion Air (C. A.) When the DIP switch is set to C.
Page 6: Section B: Staging Operation
Resetting the Rotation Sequence To reset the rotation sequence, set the Rotate / Off DIP switch to the Off setting for 5 seconds and then return the DIP switch to the Rotate setting. UNNING IMES The control displays the accumulated running time of each boiler in the VIEW menu.
Page 7 I OR When using multi-stage boilers, a selection must be made regarding the staging order of the boiler(s). This adjustment is made in the ADJUST menu of the control. Lo / Hi If the Lo/Hi staging option is selected the control stages in sequence all of the stages in a single boiler.
Page 8: Section C: Pump Operation
TAGE ELAY The stage delay is the minimum time delay between the fir- ing of stages. After this delay has expired the control can fire the next stage if it is required. This setting can be adjust- ed manually or set to an automatic setting. When the auto- matic setting is used, the control determines the best stage delay based on the operation of the system.
Page 9: Section D: Boiler Reset Operation
OILER PERATION In certain modes of operation, the control can operate the individual boiler pumps on each boiler in addition to the pri- mary pump. The boiler pump turns on prior to the boiler fir- ing and continues to run after the boiler is turned off. The amount of time that the boiler pump turns on prior to the boiler firing is determined by the BOIL MASS setting.
Page 10 type of terminal unit. This improves the control of the air temperature in the building. OILER NDOOR ESIGN EMPERATURE The indoor design temperature is the room temperature that was used in the original heat loss calculations for the build- ing. This setting establishes the beginning of the character- ized heating curve, see Figure 15 below.
Page 11 ADIANT This type of a hydronic radiant floor is embedded in either a thick concrete or gypsumpour. This heating system has a large thermal mass and is slow acting (FIG. 17). ADIANT This type of radiant heating system is either attached to the bottom of a wood sub-floor, suspended in the joist space, or sandwiched between the sub-floor and the surface.
Page 12: Section E: Domestic Hot Water Opera- Tion
SECTION E: DOMESTIC HOT WATER OPERA- TION E1: D ECTION OMESTIC DHW D EMAND A DHW Demand is required for the control to provide heat to the DHW system. A DHW aquastat or set point control is used as a switch in the DHW demand circuit. Once the con- trol detects a DHW demand, the DHW Demand pointer turns on in the LCD and the control operates the boiler to provide a sufficient boiler supply water temperature to the...
Page 13: Dhw Mode
DHW M 4 - DHW RIMARY RIORITY When a DHW Demand is present, the Relay 9 / DHW con- tact (terminals 30 and 31) is closed and the primary pump contact is closed. Priority can only be obtained using exter- nal wiring.
Page 14: Section F: Set Point Operation
UMBER OF OILERS The number of boilers used for DHW generation can be selected from one to the maximum number of boilers using the BOIL DHW setting. This applies when only a DHW Demand is present. If there are other demands present, the control does not limit the number of boilers operated.
Page 15: Set Point Mode
OILER ARGET URING The boiler target temperature during a set point demand is increased to at least the Set Point setting. This temperature is maintained as long as the control has a set point demand. OINT SETP MODE 1 - Setpoint in Parallel Whenever a set point demand is present, the boiler(s) is operated to maintain the set point target.
Page 16: Input Signal
NPUT IGNAL XTERNAL NPUT IGNAL ONVERSION ABLES The control can accept either a 0 - 10 V (dc) signal or a 2 - 10 V (dc) signal. The External Input Signal setting must be set to the proper setting based on the signal that is being sent to the control.
Page 17: Installation
• 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.
Page 18: Output Connections
Set Point Demand To generate a setpoint 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). The DHW MODE must be set to OFF. External Input (0 - 10 V dc) To generate an external input signal, a voltage between 0 and 10 V (dc) must be applied to the Com - and Out + ter-...
Page 19 Relay 9 / DHW If a DHW pump or DHW valve is connected to the Relay 9 / DHW contact (30 and 31) (FIG. 30), make sure the power to the pump or valve circuit is off and install a jumper between those terminals.
Page 20: Test The Sensors
Test the sensors according to the instructions in INS7141. OWER UPPLY Make sure exposed wires and bare terminals are not in con- tact with other wires or grounded surfaces.
Page 21: Test The Outputs
UTPUTS Primary Pump (Prim P1) If a primary pump is connected to the Prim P1 terminal (11), make sure that power to the terminal block is off and install a jumper between the Power L and Prim P1 terminals (10 and 11) (FIG.
Page 22: Dip Switch Settings
XTERNAL NPUT The External Input / Stand Alone DIP switch selects whether a Lochinvar Outdoor Sensor TST2311 or an external 0 - 10 V (dc) input signal is to be connected to the Com - and the FIG. 41 Out + terminals (1 and 4) (FIG. 43).
Page 23 The Alarm / C.A. DIP switch selects whether a combustion air damper or alarm device is to be connected to the C.A. / Alarm terminals (12 and 13) (FIG. 45). OTATE The Rotate / Off DIP switch selects whether or not the con- trol is to provide Equal Run Time Rotation of the boiler stages.
Page 26 This item is only available if the External Input / Stand Alone DIP switch is set to Stand Alone. The item is only available if the External / Input Stand Alone DIP switch is set to Stand Alone. This item is only available if the External Input / Stand Alone DIP switch is set to Stand Alone.
Page 27 Boiler Minimum Boiler Maximum Fire Delay 1 Fire Delay 2 Combustion Air Damper Delay Boil Mass Stage Delay Boiler Differential Staging DHW Mode DHW Exchange Occupied DHW Exchange Unoccupied lohi...
Page 28 (This item is only available when DHW MODE is set to OFF.) m weather (This item is only available if the External Input/ Stand Alone DIP switch is set to Stand Alone.) time that the primary pump will continue to operate after the boiler demand has been removed.
Page 29: Testing The Control
TESTING THE CONTROL The control has a built-in test routine that is used to test the main control functions. The control continually monitors the sensors and displays an error message whenever a fault is found. See the following pages for a list of the control’s error messages and possible causes.
Page 30: Error Messages
Locate and repair the problem as described in INS7141. To clear the error message from the control after the sensor has been repaired, press either the Menu or Item button. This error message only occurs if the External Input / Stand Alone DIP switch is set to Stand Alone.
Page 31: Technical Data
(FIG. 59). The control will contin- ue to operate normally. Locate and repair the problem as described in INS7141. To clear the error message from the control after the sensor has been repaired, press either the Menu or Item button.
Page 32: Typical Boiler Installation
TYPICAL BOILER INSTALLATION...
Page 33 TYPICAL BOILER INSTALLATION (CONTINUED)
Page 34: Typical Dwh Priority Heating Package System
TYPICAL DWH PRIORITY HEATING PACKAGE SYSTEM Tekmar 150 Controller...
Page 35: Notes Page
NOTES...
Page 36 9/04 - Printed in U.S.A.

This manual is also suitable for:

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