Burnham AL SL Switching relay Wiring Diagrams con’t, Switching Relay SR-504with Priority Option

Switching relay Wiring Diagrams (con’t)

Switching Relay SR-504 with Priority Option

Low Voltage

120 Volts

® ®

20°160°

150°

15°140°

10° 130° 120°

5°110°

Differential Temperature

LED

flashing green = calling for heat

solid green = at temperature

Pump/TT red = error	24v
Probe

								ZONE 4
SR 504			ZONE 1	ZONE 2	ZONE 3	ZONE 4		PRIORITY
								ON
								OFF
			FOUR ZONE SWITCHING RELAY
			WITH OPTIONAL PRIORITY
120 VOLT RELAY
COM / 24 VAC				ZONE 1	ZONE 2	ZONE 3	ZONE 4	POWER
X	X
		ZC	ZR
END SWITCH
					120 VOLT CIRCULATORS			INPUT
FUSE 1 AMP
TT ON BOILER				Water Heater Circulator				120 VAC INPUT

POWER

ZONE 1

ZONE 2

ZONE 3

ZONE 4

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