Lochinvar 90, 500 Outdoor Air Reset Option, Installation of a Remote Sensor Boiler Application

Page 37

Installation & Service Manual

5Electrical connections (continued)

Installation of a Remote Sensor (Boiler Application)

1.Turn OFF the main electrical power and the main manual gas shutoff to the appliance.

2.Remove the side access panel from the appliance to gain access to the thermostat.

3.Locate the sensor in the kit. Determine the location of the remote sensor and measure the amount of wire needed to connect the sensor to the thermostat. See Wiring of Remote Sensors on page 36 for guidelines.

4.Use twisted pair wire, minimum 18 gauge or larger. See Table 5A, page 33 regarding distance versus wire gauge. Ensure all wire insulation is trimmed to reveal at least 3/8" of exposed wire.

5.Connect the measured wire to the sensor wire using wire caps (see FIG. 5-5). Install .250 x .032 insulated female quick connect terminals to the end of the wires. Feed the wires through the access hole located on the back of the unit and secure the connectors to the thermostat connections (Sys/Tank) CN5 and CN6 located in the upper right-hand of the thermostat.

6.Turn on the electrical power and the main manual gas shutoff to the appliance.

7.Replace the side access panel.

8.Fire the appliance and resume operation.

ACCESS HOLE

CONNECT THE MEASURED

WIRE TO THE SENSOR WIRE

Figure 5-5_Installation of Remote Sensors

Outdoor Air Reset Option

For boilers ordered with the Outdoor Air Reset option, there is an additional control (FIG. 5-6). There are three setting knobs for Shutdown, Outdoor Air Max., and Ratio. There is also a switch to turn the outdoor air shutdown feature On or Off. An O.A. Sensor is also included.

Installation of a Tank Sensor (Water Heater Application)

1.Turn OFF the main electrical power and the main manual gas shutoff to the appliance.

2.Remove the side access panel from the appliance to gain access to the wire harness.

3.Locate the two blue wires with a tag notating the remote thermostat sensor. Feed the blue wires through the access hole located on the back of the unit.

NOTE: It will be necessary to add additional wire to reach from the appliance to the remote water source. Use twisted pair wire, minimum 18 gauge or larger. See Table 5A, page 33 regarding distance versus wire gauge. Ensure all wire insulation is trimmed to reveal at least 3/8" of exposed wire.

4.Connect the wires to the sensor wire using wire caps.

5.Turn on the electrical power and the main manual gas shutoff to the appliance.

6.Replace the side access panel.

7.Fire the appliance and resume operation.

(c)2002 L.C.

55

 

 

CN1

 

 

CN2

 

CN3

 

 

 

 

 

 

 

 

 

 

OJ1

CN7

 

50

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D4

 

65

O.A. SENSOR

 

 

 

 

 

CN4

C10

CN8

 

 

ON ENABLE

 

 

 

 

 

 

45

 

 

 

 

 

 

 

 

 

 

VR3

 

 

SW1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

70

 

DISABLE

 

 

 

 

 

 

 

 

W1

O.A. SHUTDOWN

 

 

 

 

 

CN5

OJ2

 

SHUTDOWN

 

 

 

 

 

 

 

 

 

 

 

 

R6

R4

C7

 

 

 

 

55

 

 

 

1.0

 

 

 

C9

 

 

 

 

0.9

 

 

 

 

 

CN6

 

 

50

60

 

1.1

 

 

 

 

 

 

 

 

0.8

1.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

65

0.7

 

1.3

 

 

 

J4

 

 

 

 

 

 

 

 

 

 

W3

 

 

 

 

 

 

 

0.6

 

1.4

 

 

 

 

 

 

VR1

 

VR2

 

 

 

R8

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

40

70

 

1.5

 

 

 

 

 

CN1

 

 

 

W1

W2

 

 

 

 

O.A. MAX.

 

RATIO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN9

 

160

 

 

 

10 11

 

 

 

 

 

 

 

200

9

 

 

 

10

 

 

140

 

8

 

12

 

 

 

 

 

 

 

 

 

 

 

R15

R16

5

 

 

15

 

 

 

 

7

 

13

 

 

 

 

 

220

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120

 

 

6

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

VR2

15

 

(F-)0

VR3

20

 

 

 

240

 

 

 

 

OFF

DIFFERENTIAL

 

 

HIGH-FIRE

 

 

SETPOINT

 

TST2314

 

 

 

OFFSET

 

Figure 5-6_Optional Outdoor Air Reset Control

37

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Page 36 Page 38
Contents Models 90,000 500,000 Btu/hr Contents Checking equipment Please read before proceedingCodes Copper-fin =B=R Rating RatingsCopper-fin Specifications Gas connection pipe Copper-fin How it worksModels CWN270 Front View Model CWN399 Front View 422 Location of unit Determine unit location3Combustion Air Direct from Outside Determine boiler location6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Conventional Negative Draft Venting System VentingVent Pipe Sizes Venting Less from Ridge From Parapet Wall Vertical Vent Termination ClearancesVent Materials Masonry Chimney InstallationSidewall Venting Number7CB with Vent Damper and Vent Damper Terminal Block Automatic Vent DamperGas Supply Gas Pressure Test Gas connectionsGas Connection Manifold PressureGas Piping Install Piping to ControlClockwise to raise regulator gas pressure, counterclockwise Gas Manifold Pressure Adjustment Procedure4Gas Supply Pressure Checking Gas Supply PressureVenting of Combination Gas Valves Combination Gas ValvesTwo Stage Burner Control System Hydronic piping Water Flow Switch if equippedRelief Valve Low Water Cutoff if equipped Typical Heating Boiler InstallationsMinimum Required Flow For Heating Boiler General Plumbing RulesPiping of the Boiler System System Temperature Rise ChartCirculator Pump Specifications Heat Exchanger Pressure Drop ChartWater Connections Heating Boilers Only Circulator Pump RequirementsPrimary/Secondary Boiler Piping Boiler Flow Rates Three Way Valves4Primary / Secondary Piping of a Single Boiler Primary / Secondary PipingNot to Exceed 4 Pipe DIA or MAX. of 12 Apart 8Multiple Boilers Zoned with Circulators Boiler Operating Temperature Control Terminal Strip WiringPower Venter Connection to Terminal Strip Electrical connectionsPump Wiring for a Heating Boiler Temperature AdjustmentOperating Temperature Control Temperature Control Settings Locating Temperature ControlMaximum SET Point Determination Maximum Set Point DeterminationInlet Water Temperature Sensor Temperature Control SensorsMulti-Purpose Temperature Sensor Outdoor Air Temperature SensorInstallation of a Remote Sensor Boiler Application Outdoor Air Reset OptionInstallation of a Tank Sensor Water Heater Application Additional Temperature Controls Manual Reset High Water Temperature Limit Control Blocked Vent and Flame Roll-Out / Flame Interlock SwitchStart-up Pre-start ChecklistInitial Start-up 1Gas Valve 90,000 270,000 Btu/hr Models Lighting InstructionsTo Turn OFF GAS to Appliance Safety Shutoff Test For Standing Pilot Ignition SystemOperating Instructions Intermittent Pilot Spark Ignition System F9/M9 Safety Shutoff Test for Spark Ignition Pilot SystemFreeze Protection To Turn Off Gas to ApplianceFreeze Protection for a Heating Boiler System if required Water TreatmentRequired Temperature Rise Required Temperature RiseDomestic water heaters Domestic Water Heaters 90,000 500,000 Btu/hr ModelsSoftened Water Systems Water ChemistryPump Operation 1Single water heatersingle tank 2Single water heatermultiple tank 3Multiple water heatersingle tank Thermostat Settings Remote Sensor InstallationMinimum Pump Performance Heat Exchanger5Danger Warning Pressure Only Relief Valve Water Flow Switch if equippedThermal Expansion Cathodic ProtectionService technician Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructionsMaintenance Check Relief Valve Check Expansion TankCheck Control Settings Check All WiringCombustion Air Adjustment Perform Start-up and ChecksHeat Exchanger / Burner Access Inspect and Clean BurnerInspection and Cleaning Procedure Clear Area Pilot Flame Adjustment ProcedureInspection of Heat Exchanger Waterways Water Circulating PumpGas Train and Controls Review with ownerTroubleshooting Pilot or replace Schematic Diagram F1 Unit DiagramsWiring Diagram F1 Unit 90,000 270,000 Btu/hr ModelsWiring Diagram F9 Unit Schematic Diagram F9 Unit315,000 399,999 Btu/hr Models Diagrams Diagrams Page Revision a ECO #C06290 initial release CFA-I-S Rev a 09/10
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