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Hydronic piping, Installation & operation manual – Lochinvar Commercial Soiler 400-801 User Manual

Page 43

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43

6

Hydronic piping

(continued)

EXPANSION
TANK

AIR SEPARATOR

BALL VALVE

(TYPICAL)

UNION (TYPICAL)

PRESSURE
RELIEF
VALVE

FLOW CHECK
VALVE (TYPICAL)

INDIRECT DHW

TANK

BOILER 1

PRESSURE

GAUGE

DRAIN POINT

(TYPICAL)

ANTI-SCALD

MIXING VALVE

DOMESTIC

HOT WATER

CIRCULATOR

MAKE UP WATER

Y-STRAINER
(RECOMMENDED)

TEMPERATURE

LOOP 1

TEMPERATURE

LOOP 2

TEMPERATURE

LOOP 3

BOILER 2

BOILER CIRCULATOR

TEMPERATURE/PRESSURE
GAUGE

COLD WATER IN

WIRES TO
LOOP SENSORS

120VAC
TO PUMPS

24V SIGNAL TO
MIXING VALVES

SHIELDED CABLE
TO BOILER CONTROL

MULTI-TEMP
LOOP CONTROL
(OPTIONAL)

IMG00181

LOOP SENSOR (3X)

BACK FLOW
PREVETER

TO
SYSTEM

FROM
SYSTEM

Figure 6-9 Multiple Boilers - Multiple Temperatures

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.

NOTICE

CAUTION

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

CAUTION

Indirect water heaters are capable of transferring a limited number of Btu’s into the water. Ensure boiler
output does not not exceed indirect water heater transfer capabilities.

Model

Number of Units

2

3

4

5

6

7

8

Manifold Pipe Sizes in Inches (mm)

400

2 1/2 (64)

3 (76)

3 1/2 (89) 4 (102) 4 (102) 5 (127) 6 (152)

501

3 (76)

3 1/2 (89) 4 (102)

5 (127) 5 (127) 6 (152) 6 (152)

601

3 1/2 (89) 4 (102)

5 (127)

5 (127) 6 (152) 6 (152) 8 (203)

701

3 1/2 (89) 5 (127)

5 (127)

6 (152) 6 (152) 8 (203) 8 (203)

801

4 (102)

5 (127)

5 (127)

6 (152) 8 (203) 8 (203) 8 (203)

Installation & Operation Manual