Hydronic piping – Lochinvar Knight 80 - 285 User Manual

Page 35

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Installation & Operation Manual

35

6

Hydronic piping

(continued)

PRESSURE

REDUCING VALVE

BACKFLOW

PREVENTER

PRESSURE

GAUGE

SYSTEM SUPPLY

SENSOR

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

DRAIN POINT

(TYPICAL)

SYSTEM

CIRCULATOR

ANTI-SCALD

MIXING VALVE

DOMESTIC

HOT WATER

CIRCULATOR

PRESSURE

RELIEF VALVE

UNION

(TYPICAL)

TEMPERATURE /

PRESSURE

GAUGE

BOILER
CIRCULATOR

DRAIN

BOILER

(LEADER)

INDIRECT

DHW TANK

BALL VALVE

(TYPICAL)

EXPANSION

TANK

HOT

WATER

OUT

ZONE #1

ZONE #2

ZONE #3

ZONE #4

AIR SEPARATOR

COLD

WATER

IN

ZONE VALVES

(TYPICAL)

DIFFERENTIAL
PRESSURE BYPASS
VALVE (IF USED)

MAKE UP WATER

BOILER 2

(MEMBER 1)

Figure 6-7 Multiple Boilers Zoned with Valves

Model

Number of Units

2

3

4

5

6

7

8

Required Pipe Sizes

80

1-1/4" 1-1/2"

2"

2-1/2" 2-1/2" 2-1/2" 2-1/2"

105

1-1/2"

2"

2"

2-1/2" 2-1/2" 2-1/2"

3"

150

2"

2"

2-1/2" 2-1/2" 2-1/2"

3"

3-1/2"

210

2"

2-1/2"

3"

3"

3-1/2"

4"

4"

285

2-1/2" 2-1/2"

3"

3-1/2" 3-1/2"

4"

5"