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Laars heating systems, Page 22 – LAARS Mighty Therm2 MT2V (Sizes 200, 300, 400) - Install and Operating Manual User Manual

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LAARS Heating Systems

Page 22

Figure 9. Water Heater Piping — One Heater, One Tank.

NOTES:

5. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT

JOB SITE

1. OPTIONAL CWMU & RECIRC. LINE LOCATION.

2. LOCATE PENNANT DHW SENSOR OR REMOTE AQUASTAT

WELL IN LOWER 1/3 OF TANK.

3. BACK FLOW PREVENTER MAY BE REQUIRED. CHECK LOCAL CODES.

4. THERMAL EXPANSION TANK MAY BE REQUIRED. CHECK LOCAL CODES.

SU

PPL

Y

REC

IR

C.

CW

MU

1

CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.

CHECK VALVE

THERMOMETER

TEMPERATURE
SENSOR

GLOBE VALVE

EXPANSION TANK

3-WAY VALVE

VALVE

PRESSURE REDUCING
VALVE

PUMP

PRV

TPRV

WATER CATEGORY

GRAIN HARDNESS PER GALLON

PPM / 17.1 = Grains Per Gallon

KEY:

S = SOFT
N = NORMAL
H = HARD

1 THROUGH 7.5
7.6 THROUGH 17
OVER 17

2

3

4

Figure 10. Water Heater Piping — Multiple Heaters, One Tank.

SUPPL

Y

RECIRC

.

CWMU

CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.

NOTES:

6. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT

JOB SITE

1. OPTIONAL CWMU & RECIRC. LINE LOCATION.

2. LOCATE PENNANT DHW SENSOR OR REMOTE AQUASTAT

WELL IN LOWER 1/3 OF TANK.

3. BACK FLOW PREVENTER MAY BE REQUIRED. CHECK LOCAL CODES.

4. THERMAL EXPANSION TANK MAY BE REQUIRED. CHECK LOCAL CODES.
5. COMMON PIPING, SHOWN WITH HEAVY LINES, MUST BE SIZED

FOR MAXIMUM COMBINED HEATER FLOW RATE.

WATER CATEGORY

GRAIN HARDNESS PER GALLON

PPM / 17.1 = Grains Per Gallon

KEY:

S = SOFT
N = NORMAL
H = HARD

1 THROUGH 7.5
7.6 THROUGH 17
OVER 17

1

5

3

4

2

CHECK VALVE

THERMOMETER

TEMPERATURE
SENSOR

GLOBE VALVE

EXPANSION TANK

3-WAY VALVE

VALVE

PRESSURE REDUCING
VALVE

PUMP

PRV

TPRV

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