Lochinvar 402 - 2072 operation manual Splay

Page 77

Installation & Operation Manual

10 Connection diagram (continued)

W VOLT HARNESS

Notes:

GITAL HARNESS

1.

All wiring must be installed in accordance with : local, state, provincial and national code requirements per either

N.E.C. in USA or C.S.A. in Canada.

2. If any original equipment wire as supplied with the appliance must be replaced

, it must be replaced with wire

R/BK

1

having same wire gauge (AWG) and rated for a minimum of 105°C

Refer to actual components for

Y

1

3.

Actual connector block locations may vary from those shown on diagrams .

X13

20

T

proper connector block locations when using diagrams to trouble shoot unit .

OPT. ALARM

F2

W

2

X8

19

GY

BL

T

LOW

F4

BL

3

LWCO

18

Y/G

1

BL

BL

1

O/BK

VOLTAGE

3

O/BK

17

BR/W

O

4

2

Y

Y

2

T

TEST

HARNESS

BL

5

4

O

16

BK/R

3

2

1

LWCO

R/BK

6

FLOW SWITCH

BL

FLOW

6

5

4

152 BL/BK

PROBE

~~~~

BR

7

SWITCH

~~~~

14

BK

O

1

1

O

~~~~

W/BK

8

RESET

132

W/R

O/BK

2

2

O/BK

G

LWCO

3

PR

Y

BL BL

CONTROLLER

12

R/W

CHASSIS

2

R

10

T

NC

BLOCK

24VAC

PR

3

2

1

GROUND

1

11

W

P

FLUE

6

5

4

6

P

NO

COMSWITCH

CONNECTION

AIR PROVE

5

P

BOARD

O/R

4

BL

COM

SWTICH

4

PR

X7

8

PR

HI-GAS

1 PR

BL

1

O/BK

2

2

O/BK

Y

R

BL

10

Y

O/R

2

R

2

2

1

1

O

120V

11

W/BK

BL

1

1

O/BK

3

O

LO - GAS

12

T

BL

O

R

R

4

2

2

O

13

GY

R

O/BK

SILENCING

ALARM

ALARM RELAY

O/R

5

BL

1

1

O/BK

14

T/W

R

1

2

SWITCH

BELL

120VAC COIL

R/O

6

152

R/W

BR

7

16

BR/W

1

C

2

X6

GROUNDING

NC C NO

DIGITAL

1

O

X5

+

IDENTIFICATION PLUG

AUXILLIARY

HARNESS

GY

2

+

OPTION

HI-LIMIT

3

G

JUMPER

X11

MODEL SPECIFIC

X9

X4

CONSULT

LOW VOLT HARNESS

FACTORY

1

2

3

1

NOTE: NUMBER OF GAS VALVES VARIES BY MODEL

O O/BK

SPLAY

2-SPD BLOWER

R

BL

G

1

BK

HI

HI

BK

1

2

R

Y

R

R

Y

R

R/BKY R/BK

R/O Y R/O

R/O Y R/O

R/W Y R/W

O/

2

R

LO

LO

R

2

O

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

120V

BK

3

W

NEU

NEU

W

3

S1

S1

S2

S3

S3

S4

4

G

GND

GND

G

4

1

3

TO

BL

1

Y

1

2

3

4

5

6

CONNECTION

R/O

4

BK/

BK

BK/

BK

G

BOARD

2

Y

BK

R

BK/

R/W

5

LOW GAS

W

W

R

2

3

Y

STAGE #1

STAGE #1

STAGE #2

STAGE #3

STAGE #3

STAGE #4

TO

1

BK 1

TO

6

SWITCH

1

BL

BK/

PWR

2

XFMR

3

W 3

4

BURNER

W

W

2

R

#2 HSI

BURNER

120V

HI LO

120V

W

5

R/BK

#1 HSI GROUND

GROUND

W

MODBUS ADAPTER

3

6

BLOWER RELAY

HI/LO SPEED RELAY

GY

1

GY

G

GY/W

G

120VAC COIL

120VAC COIL

FACTORY

FIELD

G

GY

2

GY

GY/W

CIRCUIT

BL

OPTIONS

OPTIONS

3

BREAKER

WIRE COLOR REFERENCE

G

4

GY/W

BL

5

GY/W

MAIN UNIT HARNESS

W = WHITE

T=TAN

NITER

6

!

50VA

BK = BLACK

Y=YELLOW

G

3

2

W

DANGER

120V

24V

PR=PURPLE

BR=BROWN

P=PINK

GY=GRAY

BK

1

BK

BK

60VA

BL

BL

BL=BLUE

G=GREEN

4

BK/W

TO PREVENT ELECTRICAL SHOCK

W

W

75VA

Y

Y

O=ORANGE

R=RED

BK/R 5

THISHEATERMAYBECONNECTED TO MORETHANONEBRANCH

100VA

Y/G = YELLOW WITH GREEN STRIPE

MAIN UNIT

CIRCUIT. MORETHANONEDISCONNECT SWITCH MAY BE

GAS VALVE XFMR

LBL20082 REV A

REQUIREDTO DE-ENERGIZE THEEQUIPMENT FORSERVICING.

77

Image 77

Contents Save this manual for future reference Models 402Contents Removal of Combustion Chamber Lining or Base Panels Please read before proceedingSpecial instructions Owner warning Safety informationCopper-fin II How it works Copper-fin II How it works Copper-fin II How it works Copper-fin =B=R Rating RatingsLocation of unit Determine unit locationIndoor clearances from combustible construction Freeze protectionLocation Outdoor boiler installationHydronic systems anti-freeze Combustion and ventilation airMinimum Recommended Combustion AIR Supply to Equipment Room Outside Combustion Air Using Direct VentingCombustion air filter Exhaust fansIdentify your appliance’s vent system VentingCAT IV Flue pipe materials CAT I Negative pressure non-condensingDirect Vent see Barometric damper location General informationVenting support Negative draft Conventional negative draft venting seeFlue outlet piping 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 Combustion air inlet piping Vertical DirectAire venting seeLength of air inlet pipe Sidewall air inletClearances Vertical Rooftop Air InletCombined air inlet points Directaire Kits Model Horizontal KIT Vertical KIT Venting of flue productsSidewall with fan Sidewall venting seeSidewall venting termination Sidewall vent termination clearances and locationSidewall venting without fan Drain tee installationModels 402 Venting of flue products Horizontal DirectAire venting Powered Venting seeVertical DV venting termination Direct venting seeFlue outlet piping Horizontal DV venting termination Masonry chimney installationHorizontal Vent Termination Clearances and Location Combustion air inlet pipingAir inlet piping materials Connecting the air inlet pipe to the unitLength of air inlet pipe Sealing PVC, CPVC, ABS, dryer vent, and flex duct vent pipeVertical and sidewall combustion air inlet Multiple sidewall direct vent installationsHorizontal combustion air inlet clearances Vertical Combustion Air Inlet ClearancesOutdoor vent cap kit Outdoor installation seeOutdoor vent/air inlet location Gas connections Connecting to gas supplyGas pressure test Gas connectionVenting of combination gas valves Combination gas valvesGas train and controls Checking gas supply pressure GAS Piping Size ChartWater connections Water flow switchInlet and outlet connections Heat exchangerRelief valve Heating boiler installationsPiping of the boiler system Water connections heating boilers onlyLow Temperature Return Water Systems Minimum boiler water temperaturesLow temperature bypass requirements LTV Valve Kits Model LTV Valve KITThree way valves in system Low system water volumeRadiant floor and snow melt heating systems Maximum Flow for Heating BoilerTypical heating boiler installations Temperature / pressure gaugeInstallation with a chilled water system DHW installationDiameter GPM4Primary/Secondary Piping of Multiple Boilers Floor Drain Heating Supply Loop 6Primary/Secondary Piping with Buffer Tank Electrical connections Installation must comply withBoiler operating control module AMP Draw DataEMS or remote thermostat connection Line voltage connectionsLow voltage connections DHW Domestic Hot Water thermostatAlarm contacts Louver proving switchLouver relay System supply sensor recommended use4Low Voltage Field Wiring Connections Wiring of the cascadeStart-up Check vent and air piping Check thermostat circuitsPlacing the boiler in operation Start the boiler1Lighting Instructions Set clock Configuration of the cascadeSet DHW operation General Operating informationHow the appliance operates How the control module operatesProtection features Temperature controlCascade Boiler temperature regulationOutdoor reset operation, if used boilers only Sequence of the cascade DHW, Night Setback, and Ramp Delay operation with cascadeDAY Switching on Sequence Operation Display Sequence of operationCopper-fin II control module MENU/EXIT Display Screen ENTER/RESET UpdownInstaller Access modesUser To save parameters and exit programmingStatus display screens Inlet Open Inlet ***FInlet Shorted Syssup ***FDHW Pump Delay Unit Pump DelaySTG Demand FAN SpeedMIX VAL POS ** % Operation of the cascadeModel Temperature Rise F Temperature Rise AT Full Rate Fire 90 GPM FlowDomestic water heaters Maximum Water FlowWater chemistry 1Typical Water Heater Piping with Storage Tank 2Single Water Heater Piping with Two Storage Tanks 3Multiple Water Heater Piping with a Single Storage Tank 4Multiple Water Heater Piping with Multiple Storage Tanks Heat exchanger Pump operationMinimum Pump Performance Ft. HdDomestic water temperatures Thermostat adjustment procedureMinimum water temperatures domestic hot water use Thermal expansion Optional relief valveCathodic protection Location of Cold Water Supply Piping ConnectionsOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check control settings Check all wiringCheck relief valve Inspect/replace hot surface igniter Ignition system checkoutPerform start-up and checks Inspect and clean burnerCheck burner flame Check flue gas passagewaysOiled bearing circulators Inspect and clean the heat exchangerReview with owner Digital Harness Connection diagramSplay Ladder DiagramFlow Switch

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402 - 2072 specifications

The Lochinvar 402 - 2072 is a versatile and highly efficient boiler designed to meet the heating demands of modern residential and commercial applications. This model stands out due to its innovative technologies, advanced features, and a high level of reliability, making it an ideal choice for consumers looking for an enduring and economical heating solution.

One of the primary characteristics of the Lochinvar 402 - 2072 is its impressive energy efficiency. With an exceptional annual fuel utilization efficiency (AFUE) rating, this boiler ensures minimal energy waste, allowing homeowners and business operators to save significantly on their energy bills. The model incorporates advanced condensing technology that enables it to extract heat from the combustion gases, maximizing heat transfer and reducing emissions.

The Lochinvar 402 - 2072 is built with a robust stainless steel construction that enhances durability and resilience against corrosion and other environmental factors. This material not only prolongs the lifespan of the unit but also contributes to its outstanding thermal efficiency. Additionally, the boiler's compact design allows for flexible installation options, making it suitable for various spaces, including tight utility rooms and basements.

Equipped with a user-friendly control interface, the Lochinvar 402 - 2072 allows for easy monitoring and adjustment of settings. Its advanced digital display provides real-time data on system performance, ensuring the operator can maintain optimal performance and efficiency.

Another noteworthy feature is the unit's quiet operation. The design includes sound-dampening insulation and high-efficiency circulators, keeping noise to a minimum, which is an essential trait for both residential and commercial settings.

The Lochinvar 402 - 2072 is also designed with safety in mind. It incorporates multiple safety features including an automated vent damper, low water cutoff, and a comprehensive control system that monitors various operating conditions. This proactive approach to safety ensures that potential issues are identified and addressed before they become critical.

In conclusion, the Lochinvar 402 - 2072 boiler presents an exceptional combination of efficiency, durability, and user-friendly features. Its advanced condensing technology, stainless steel construction, and focus on safety make it a leading choice in the competitive boiler market, catering to the heating needs of a diverse range of applications while ensuring environmental responsibility. For those in search of a dependable and efficient heating solution, the Lochinvar 402 - 2072 is certainly worth considering.