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Inputs outputs, Field wiring, Installation & service manual – Lochinvar Shield SNA285-125 User Manual

Page 41

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8

Field wiring

(continued)

41

Figure 8-4 Control Inputs/Outputs

TANK SENSOR

LOW VOLTAGE

CONNECTION

BOARD

INLET TEMPERATURE

SENSOR

OUTLET TEMPERATURE /

HIGH LIMIT SENSOR

FLUE GAS SENSOR

FLAME SENSOR

LOW WATER CUTOFF

BLOCKED DRAIN SWITCH

DISPLAY PANEL

CONTROL BOARD

BLOCKED AIR INLET PRESSURE SWITCH

LOW VOLTAGE

CONNECTION

BOARD

CONTROL BOARD

ALARM BELL (ALARM CONTACTS)

RUNTIME CONTACTS

WHR PUMP

IGNITER

BLOWER

GAS VALVE

DISPLAY PANEL

INPUTS

OUTPUTS

Installation & Service Manual

TM