Lochinvar RSB-i&s-05, CP-5M-4/08, 45 Outdoor AIR Reset Option, Additional Temperature Controls

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5.Make sure good mechanical connections are made to the sensor, any interconnecting wiring and the controller.

6.Do not mount sensor with leadwire end pointing up in an area where condensation can occur.

7.Use shielded wiring to connect the sensor to the control when the possibility of an electrically noisy environment exists. Shielded cable is recommended on all cable runs of more than 25 feet in length.

NOTE:

Ground the cable shield at the connection to the boiler temperature control only. Do not ground the shielded cable at the sensor end.

To maintain temperature accuracy, sensor wires should be 18 AWG two conductor (18/2). Use shielded wire if required.

OUTDOOR AIR RESET OPTION

Outdoor Air Reset Option

For boilers ordered with the Outdoor Air Reset option, there is an additional control (FIG. 29). 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.

(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

 

 

 

 

 

VR1

 

0.6

VR2

1.4

 

 

 

R8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

70

 

0.5

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

 

FIG. 29 Optional Outdoor Air Reset Control

Shutdown

The Shutdown knob specifies the outdoor air lockout temperature at which the control would prevent the unit from operating.

Outdoor Air Max (O.A. Max)

The O.A. Max knob allows a reset up to the maximum outdoor air temperature specified by this knob setting. When the outdoor air temperature is above the specified setting, the unit will not function in the O.A. Reset Mode, but will continue to run at the selected set point temperature.

Note that the set point knob will now indicate the “minimum” boiler temperature. Target temperature is determined by the ratio and outdoor air temperature below the O.A. Max setting.

Ratio

The Ratio knob allows control over the reset ratio to be used during Outdoor Air Reset. The allowable ratios are as low as 0.5:1 or as high as 1.5:1.

Selecting the 0.5:1 ratio will increase the set point 0.5° for every 1.0° drop in outdoor air temperature up to the maximum set point temperature.

Selecting the 1.5:1 ratio will increase the set point 1.5° for every 1.0° drop in outdoor air temperature up to the maximum set point temperature.

If the outdoor design and boiler design temperatures are known, the Ratio setting can be calculated using the following formula:

Ratio = (boiler design temperature - operator set point) (O.A. Max. setting - outdoor design temperature)

Note that the reset set point cannot exceed the maximum set point of the boiler thermostat.

These settings are illustrated graphically in Figure 30.

FIG. 30 Outdoor Air Control Example Chart

Outdoor Air Shutdown Enable/Disable Switch

The Outdoor Air Shutdown Enable/Disable switch turns the outdoor air shutdown feature On and Off. Disabling the Outdoor Air Shutdown feature allows the unit to operate regardless of the outdoor air temperature. This is needed for indirect domestic hot water systems for example.

ADDITIONAL TEMPERATURE

CONTROLS

High Water Temperature Limit Control

The appliance is supplied with a fixed setting, auto-reset high water temperature limit control. The setting of this control limits maximum discharge water temperature. If water temperature exceeds the setting, the limit will break the control circuit and shut down the appliance. The limit control will only be reset after the water tem- perature has cooled well below the setting of the limit. The auto-reset high water temperature limit control is mounted in the outlet side of the front header.

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Contents Special Instructions to Owner WarrantyChecking Equipment Contents User Warning Codes Installation ProcedureLocation of Unit Clearance from Combustible Construction Clearances from Combustible ConstructionCombustion Air Through Ducts Table a Minimum Recommended Combustion AIR Supply OpeningsTable B Vent Pipe Sizes VentingConventional Negative Draft Venting System Input Btu/hr Flue SizePage Venting Termination Vent Termination from Peaked Roof 10’ or Less from RidgeSidewall Venting Masonry Chimney Installation Inspection of a Masonry ChimneyAutomatic Vent Damper Vent Damper and Vent Damper Terminal BlockGAS Connection GAS Supply GAS Pressure TestTable C Table D Manifold PressureTable G GAS Connections Table F Fittings to Equivalent Straight PipeBtu/hr Distance from Meter In Feet Install Piping to Control GAS PipingGAS Manifold Pressure Adjustment Procedure WrenchChecking GAS Supply Pressure PilotCombination GAS Valves Venting of Combination Gas ValvesRelief Valve Water Flow Switch if Equipped Relief Valve Water HeaterTWO Stage Burner Control System Minimum Flow Rate Required to Actuate Flow SwitchLOW Water Cutoff if Equipped Table J AMP Draw DataOperating Temperature Control Temperature AdjustmentTemperature Control Settings Locating Temperature ControlWiring of Remote Sensors Temperature Control SensorsInstallation of Remote Sensors High-Fire OffsetOutdoor AIR Reset Option Additional Temperature ControlsManual Reset High Water Temperature Limit Blocked Vent and Flame ROLL-OUT/FLAME Interlock SwitchInitial START-UP Lighting Instructions for Standing Pilot Models F1 PRE-START ChecklistInput for Your Safety Read Before Operating What to do if YOU Smell GASLighting Wand To Turn OFF GAS to Appliance Safety Shutoff Test for Standing Pilot Ignition SystemLighting Instructions for Spark Ignition Pilot Models F9/M9 Safety Shutoff Test for Spark Ignition Pilot System Operating Instructions To Turn OFF GAS to ApplianceFreeze Protection for a Heating Intermittent Pilot Spark Ignition System F9/M9Freeze Protection F9/M9 Intermittent Spark Ignition Pilot ModelsMaintenance Water TreatmentInspection Cleaning Procedure Removal of Combustion Chamber Lining or Base PanelsOuter Air Deflector and HEX Filler Bracket Piping of the Boiler System GAS Train and ControlsWater Connections Heating Boilers only Circulator Pump RequirementsTable L Circulator Pump SpecificationsCirculator Pump Operation PRIMARY/SECONDARY Boiler Piping Primary/Secondary Piping of a Single BoilerThree WAY Valves LOW Temperature Bypass RequirementsBoiler Flow Rates Table M Minimum Required Flow for Heating Boiler General Plumbing RulesInstallation with a Chilled Water System Table NTable O Terminal Strip Wiring Boiler Operating Temperature ControlPower Venter Connection To Terminal Strip Wire GaugeWater Velocity Control Required Temperature RiseTable P Required Temperature Rise Btu/hr To 7 Grains To 25 Grains HardnessSoftened Water Systems Water ChemistryPump Operation Minimum Pump Performance Remote Sensor Installation InstructionsThermostat Settings Heat ExchangerAutomatic Vent Dampers Optional Relief ValveCathodic Protection Thermal ExpansionDo not plug or cap the relief valve discharge Troubleshooting Guide 90,000 270,000 Btu/hr Models Water Heaters F1 Schematic Diagram F1 Unit Schematic Diagram F9 Unit Schematic Diagram M9 Unit Schematic Diagram F9/M9 Unit Page
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