Lochinvar WH 55-399 Hydronic piping continued, Installation & Operation Manual, Notice, Boiler

Installation & Operation Manual

6 Hydronic piping (continued)

Figure 6-8Single Boiler - Multiple Temperature - DHW Priority

	PRESSURE		TEMPERATURE		TEMPERATURE		TEMPERATURE
BACKFLOW	REDUCING VALVE			LOOP #1		LOOP #2		LOOP #3
PREVENTER		PRESSURE
		GAUGE

MAKE
UP	SYSTEM	MIXING VALVES
WATER
		(TYPICAL)
	SUPPLY
	SENSOR

AIR SEPARATOR

	EXPANSION
	TANK
	MAY SUBSTITUTE				WIRES TO
	LOW LOSS HEADER				LOOP SENSORS
	NOT TO EXCEED 4 PIPE DIA		120VAC TO PUMPS		MULTI-TEMP
BALL VALVE	OR MAX. OF 12" APART		24V SIGNAL TO
					LOOP CONTROL
(TYPICAL)	Y-STRAINER
			MIXING VALVES
	(RECOMMENDED)	SHIELDED CABLE TO
DRAIN POINT	BOILER		BOILER CONTROL
(TYPICAL)	CIRCULATOR	DOMESTIC
	FLOW CHECK	HOT WATER		HOT WATER
		CIRCULATOR			ANTI-SCALD
	VALVE			OUT
					MIXING VALVE
					COLD
					WATER
					IN
	PRESSURE
	RELIEF
	VALVE
		BOILER
	UNION	DRAIN
	(TYPICAL)
	TEMPERATURE /
	PRESSURE			IMG00190
	GAUGE

CAUTION

NOTICE

Mixing valves are required for the protection of low temperature loops.

Please note that these illustrations are meant to show system piping concept only, the installer is responsible for all equipment and detailing required by local codes.

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