Lochinvar 51 operation manual Multiple Boilers Multiple Temperatures

Installation & Operation Manual

6Hydronic piping (continued)

Figure 6-6Multiple Boilers - Multiple Temperatures

Model

Number of Units

2

3

4

5

6

7

8

Required Pipe Sizes

51

1"

1-1/4"

1-1/2"

2"

2"

2"

2"

81

1-1/4"

1-1/2"

2"

2"

2-1/2"

2-1/2"

2-1/2"

106

1-1/2"

2"

2"

2-1/2"

2-1/2"

2-1/2"

3"

151

2"

2"

2-1/2"

2-1/2"

3"

3-1/2"

3-1/2"

211

2"

2-1/2"

3"

3-1/2"

3-1/2"

4"

4"

PRESSURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

BACKFLOW

REDUCING VALVE

LOOP #1

LOOP #2

LOOP #3

PREVENTER

PRESSURE

MAKE

GAUGE

UP

SYSTEM

MIXING VALVES

WATER

(TYPICAL)

SUPPLY

SENSOR

AIR SEPARATOR

EXPANSION

TANK

MAY SUBSTITUTE

LOW LOSS HEADER

NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART

BALL VALVE

(TYPICAL)

DRAIN POINT

(TYPICAL)

BOILER	DOMESTIC
CIRCULATOR
	HOT WATER
FLOW CHECK	CIRCULATOR	HOT
		WATER
VALVE	ANTI-SCALD
		OUT
	MIXING VALVE
Y-STRAINER		COLD
(RECOMMENDED)		WATER
		IN

BOILER BOILER

	TEMPERATURE /
UNION	PRESSURE	DRAIN
(TYPICAL)	GAUGE	INDIRECT
		DHW TANK

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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