Lochinvar 502, 2072 operation manual Connection diagram, Digital Harness

Page 62

Installation & Operation Manual

9 Connection diagram

 

FIELD WIRING

1

+

ALARM

 

 

 

OPT. ALARM HARNESS

 

 

 

 

 

 

 

 

 

LOW VOLT HARNESS

TO MONITORING DEVICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

CONTACTS

 

 

 

 

PR

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

+

 

 

 

 

 

 

 

 

 

4

PR

 

 

 

 

 

 

 

 

DIGITAL HARNESS

TO MONITORING DEVICE

3

RUNTIME

 

 

 

 

BL

2

 

 

 

 

 

 

 

 

+

CONTACTS

 

 

 

 

5

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24V

 

OPEN

4

+

OPEN

WAY-3 VALVE

 

 

 

 

Y

3

 

 

 

 

 

 

 

 

 

 

 

 

 

3-WAY

 

5

 

CN4

 

 

6

P

 

 

G

12

 

 

 

 

 

 

 

 

 

VALVE

 

COMMON

6

+

COM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLOSE

 

+

CLOSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STAGE #1

7

+

S1

 

 

 

 

 

BR

1

 

 

 

 

 

GY

10

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

7

BR/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

S1

 

 

 

 

 

 

 

 

 

BK/W

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

7 GY

 

 

 

F2

 

 

 

CONNECT

STAGE #3

12

+

S2

 

STAGING

 

 

 

 

 

9

R/BK

 

 

 

 

 

 

 

 

 

 

TERMINAL

+

S3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F4

 

 

 

 

TO

STAGE #2

10

+

S2

 

 

 

 

 

R/O

3

8

R

 

 

BK

6

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

#19

 

 

 

13

+

S3

 

 

 

 

 

T/W

4

10

R/W

 

 

P

4

3

W

 

 

 

 

 

 

 

(LOUVER

STAGE #4

+

 

 

 

 

 

 

 

 

 

 

BR/W

2

X1

 

 

 

 

 

 

RELAY)

14

S4

 

 

 

 

 

Y

5

 

 

1 PR

 

 

 

 

 

 

 

 

 

 

 

15

+

S4

 

 

 

CN5

 

11

GY

 

 

 

 

 

 

 

 

 

 

 

LOUVERS

M

 

COM

+

LOUVER PROVINGFIELD

 

BL

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

+

COIL

 

 

 

 

12

W/BK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROVE

16

+

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE

 

17

+

LOUVER RELAYWIRING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NEU

 

20

+

TANK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AQUASTAT

+

AQUASTAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTROL

 

 

 

 

 

CN3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F5

 

TANK

 

SENSOR

22

+

TANK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

+

SENSOR

 

 

 

Y

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

SHIELD

CASCADE

 

 

 

6

R/W

 

 

 

BK

 

 

 

 

 

 

 

 

 

 

 

 

 

24

CN6

 

BR/W

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

SHIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNITS

 

 

 

25

+

A

 

 

 

 

 

 

 

7

BR

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

26

+

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FROM

 

0-10V DC IN

27

+

 

 

 

 

 

 

 

 

8

Y/G

 

 

GY/W

2

 

 

 

 

 

 

 

 

 

28

+0-10V

 

 

 

 

BL

4

 

 

1

X2

 

 

 

 

 

 

 

BMS

 

COMMON

29

+

-BMS IN

 

 

 

 

9

BL/BK

 

GY/W

 

 

 

 

 

 

 

 

TO

 

0-10V DC OUT

+

+0-10V

 

 

 

 

PR

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

 

 

 

10

O/R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BMS

 

COMMON

31

+

-RATE OUT

 

 

 

 

 

 

 

 

 

 

 

 

F6

 

 

 

 

 

 

MOD

 

 

 

+

 

 

 

CN1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

SHIELD

MODBUS

 

MODULE

 

 

1

Y

3

 

 

 

 

 

 

 

 

 

 

 

 

BMS

 

 

 

34

+

SHIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUS

 

 

 

33

+

A

 

 

 

 

 

MODBUS

 

 

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

T

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35 CN2

 

 

 

 

 

CONNECTIONS

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POOL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAFETY

 

OUT

 

1

+

OUTDOOR

 

 

 

 

 

 

 

 

 

 

4

 

PR

 

 

 

 

 

 

 

 

SUPPLY BK

DOOR10K

SENSOR

 

20K

POOLSUP SENSOR

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

R

AIR

 

3

+

SENSOR

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

G

 

2

+

 

10K

 

 

 

 

 

 

 

 

 

3

 

PR

X3

 

 

 

 

 

10K/20K

 

10K

 

 

 

SYS SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

4

+

 

10K 10K

 

 

Y

1

5

BK

 

 

1

 

P

 

 

 

 

 

 

 

 

POOL/BOILER

10K

 

+

SYS RETURN

 

 

 

P

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

CN1

 

 

6

W/R

 

 

 

 

 

X10

 

 

 

 

 

 

FROM

 

 

 

+

SENSOR10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0-10V DC IN

6

+

0-10V SYS

 

 

 

 

 

 

7

R/BK

 

 

 

 

 

 

X12

 

 

 

X4

 

PUMP

 

COMMON

7

+

- PUMP IN

 

 

 

 

 

 

 

BK/R

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

8

CN2

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

X9

 

 

 

 

10K/20K

 

 

BOILER/POOL HEATER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAFETY

 

 

 

G

4

2

BK

 

 

 

 

4

Y

 

 

 

 

 

 

 

DISPLAY

 

OUTLET

 

 

 

 

 

W

3

 

 

W/BK 2

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

1

R

 

 

W

 

3

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INLET

 

10K

 

 

 

 

 

 

BR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

 

BR

 

 

 

 

 

 

 

 

G

 

24V COM

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAIN POWER HARNESS

 

 

 

 

 

 

 

S3/S4

 

BL

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24V

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

R/O

4

 

 

 

 

 

 

 

 

 

 

OPT. MODBUS HARNESS

 

CONTROLLER

GROUND

 

 

2

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R/W

5

IND-DHW PUMP

 

 

W

 

 

 

 

 

 

 

 

XFMR

 

 

 

 

 

 

S1/S2

3

Y

 

 

 

 

 

 

 

1 BK

 

 

 

 

 

 

 

 

 

 

 

6

 

RELAY COIL R

 

 

 

 

 

BK

1

 

 

120V 60VA 24V

Y

2

 

 

 

2 Y

 

 

1

BL

 

 

120V

 

 

 

 

P

 

G 2

 

 

3 W

 

 

3

 

Y

4

 

R

 

 

 

 

 

 

 

 

W

3

 

 

 

 

 

BL 3

 

 

BL

 

Y

2

 

 

SYSTEM PUMP

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

R/BK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

RELAY COIL R

 

 

PR

 

 

 

 

 

 

 

 

 

 

CKT. BREAKER

 

 

Y

6

 

 

 

 

120V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G

1

GY

 

 

GY

1

 

1HP

 

UNIT

 

 

BR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

GY

 

 

GY

2

 

 

 

 

 

 

 

 

 

 

 

 

 

BR

 

BR

 

 

 

GY/W

3

 

 

3

MAX

PUMP

 

 

BR

 

 

 

 

 

 

 

 

 

 

 

 

 

4

G

 

 

G

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GY/W

5

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

BK

 

 

BR/

 

 

 

 

 

 

6

IGNITER

 

6

120V/60Hz NEUTRAL

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

120V

 

 

 

W

1

BK

 

 

 

BK

SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE

 

 

BK

 

 

 

 

BK

 

 

W

 

 

AC

 

 

 

2

G

 

 

 

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BK/W

3

 

 

 

 

 

 

 

 

 

 

 

 

 

CHASSIS

ON/OFF

 

 

 

PUMP RELAY

 

 

 

4

BK/R

 

 

 

BK/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

GROUND

 

G

 

 

 

 

GROUND

SWITCH

 

 

 

120VAC COIL

 

 

 

 

 

 

MAIN UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: Not all connections/features apply to pool heaters.

62

Image 62
Contents Installation & Operation Manual Models 502 Save this manual for future referenceContents Removal of Combustion Chamber Lining or Base Panels Please read before proceedingSpecial instructions Safety information Owner warningCopper-fin2- How it works Copper-fin2- How it works Copper-fin2- How it works Specifications RatingsIndoor clearances from combustible construction Determine unit locationLocation of unit Freeze protectionHydronic systems anti-freeze Outdoor pool heater installationLocation Combustion and ventilation airOutside Combustion Air Using Direct Venting Minimum Recommended Combustion AIR Supply to Equipment RoomExhaust fans Combustion air filterCAT IV Flue pipe materials VentingIdentify your appliance’s vent system CAT I Negative pressure non-condensingVent system options Draft VentingBarometric damper location General informationVenting support Flue outlet piping Conventional negative draft venting seeNegative draft Common Venting SystemsInspection of a masonry chimney Masonry chimney installationsVertical vent termination clearances and location 1Vent Termination from Peaked Roof 10 ft. or Less From Ridge Length of air inlet pipe Vertical DirectAire venting seeCombustion air inlet piping Sidewall air inletClearances Vertical Rooftop Air InletCombined air inlet points Venting of flue products Directaire Kits Model Horizontal KIT Vertical KITSidewall venting termination Sidewall venting seeSidewall with fan Sidewall vent termination clearances and locationDrain tee installation Sidewall venting without fanModels 502 Horizontal DirectAire venting Powered Venting see Venting of flue productsVertical DV venting termination Direct venting seeFlue outlet piping Horizontal Vent Termination Clearances and Location Masonry chimney installationHorizontal DV venting termination Combustion air inlet pipingLength of air inlet pipe Connecting the air inlet pipe to the unitAir inlet piping materials Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeHorizontal combustion air inlet clearances Multiple sidewall direct vent installationsVertical and sidewall combustion air inlet Vertical Combustion Air Inlet ClearancesOutdoor vent cap kit Outdoor installation seeOutdoor vent/air inlet location Gas connection Connecting to gas supplyGas connections Gas pressure testGas train and controls Suggested GAS Pipe Size for Single Unit Installations ModelCombination gas valves Venting of combination gas valvesGAS Piping Size Chart Checking gas supply pressure502 752 Models Water connectionsCirculating pump 992 1442 ModelsMinimum Pump Performance Heat exchangerInitial set-up of maximum water flow Auxiliary Mixed Water Limit Control3Heater Within 15 feet of Pool Piping 6Cascaded Heaters Beyond 15 feet of Pool Piping Pool Return Sensor Location MIN Primary Outdoor operation 3-way valve cover Automatic bypass valve cover installationPumped Automatic Bypass Pump purge pre-running delay Water flow switchPump purge delay Relief valveRemote Wire Connection Way automatic bypass valve wiringWay Automatic Bypass Valve Wiring Electrical connectionsLine voltage connections Installation must comply withPool heater operating control module AMP Draw DataPool supply/limit sensor 4-wire Louver proving switchPool return sensor 2-wire Low voltage connectionsAlarm contacts Wiring of the cascadeStarting the filter system Pre-start checklistStartup Check for gas leaksPlacing the pool heater in operation Check thermostat circuitsCheck vent and air piping Start the pool heater2Operating Instructions Configuration of the cascade Set clockOperating information GeneralPool heater temperature regulation Sequence of the cascade DAY Switching on SequenceCascade Sequence of operation MENU/EXIT Display Screen ENTER/RESET Updown Copper-fin2control moduleUser Access modesInstaller To save parameters and exit programmingStatus display screens Sysrtn Shorted Unit Pump DelaySysrtn Open STG DemandOwner maintenance Maintenance Maintenance and annual startupService technician Inspect appliance area MaintenanceAddress reported problems Inspect appliance interiorCheck relief valve Inspect/replace hot surface igniter Check all wiringCheck control settings Ignition system checkoutCheck flue gas passageways Inspect and clean burnerPerform start-up and checks Check burner flame Review with owner Oiled bearing circulatorsConnection diagram Digital HarnessController Ladder diagram LOW VoltageRuntime Contacts 2BOARDCONNECTION Outdoor S5SENSOR POOL2ND Page
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Manual 44 pages 17.92 Kb Manual 16 pages 36.89 Kb

2072, 502 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

One of the standout features of Lochinvar 2072,502 is its advanced thermal efficiency. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the unit delivers exceptional heat output while minimizing energy consumption. This not only reduces utility bills for homeowners and businesses but also supports sustainability efforts by decreasing carbon footprints.

The Lochinvar 2072,502 incorporates cutting-edge technologies that set it apart in the market. It is equipped with advanced control systems that allow users to precisely manage heating outputs, ensuring optimal comfort while conserving energy. The user-friendly digital display provides real-time data, allowing for efficient monitoring and control.

Another significant characteristic of the Lochinvar 2072,502 is its robust stainless-steel construction. This feature enhances the unit's durability and longevity, ensuring reliable performance even in challenging conditions. The high-quality materials also contribute to maintaining consistent water temperatures, which is essential for both residential and commercial heating needs.

The Lochinvar 2072,502 operates silently, making it ideal for installations in areas where noise is a concern. Its compact design allows for flexible installation options, fitting seamlessly into various spaces, whether it’s a utility room, basement, or outdoor area.

Furthermore, the unit supports multiple venting options, accommodating different building architectures and layouts. This versatility makes it an ideal choice for new builds and retrofitting existing systems.

Maintenance is streamlined with the Lochinvar 2072,502, as it features a self-diagnostics system that simplifies troubleshooting. Regular service check-ups are made easier with accessible components, allowing technicians to perform maintenance tasks efficiently.

In summary, the Lochinvar 2072,502 stands out for its high efficiency, advanced technology, durability, and flexible installation options. It is an ideal choice for those seeking a reliable and technologically advanced water-heating solution that meets the challenges of contemporary heating demands while promoting energy savings and environmental responsibility.