Laars MIGHTY THERM2 MT2H Installation And Operation Instruction Manual page 23

Mighty Therm 2 (200, 300, 400) Install & Operating
NOTES:
1. OPTIONAL CWMU & RECIRC. LINE LOCATION.
2. LOCATE 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. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT
JOB SITE
THERMOMETER
TEMPERATURE
SENSOR
Figure 12. Water Heater Piping — One Heater, Multiple Tanks.
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
NOTES:
1. OPTIONAL CWMU & RECIRC. LINE LOCATION.
2. LOCATE 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.
6. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT
JOB SITE
THERMOMETER
TEMPERATURE
SENSOR
Figure 13. Water Heater Piping — Multiple Heaters, Multiple Tanks.
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
GLOBE VALVE 3-WAY VALVE
CHECK VALVE VALVE
GLOBE VALVE 3-WAY VALVE
CHECK VALVE VALVE
WATER CATEGORY
GRAIN HARDNESS PER GALLON
S = SOFT
N = NORMAL
H = HARD
PPM / 17.1 = Grains Per Gallon
4
3
2
2
TPRV PRESSURE REDUCING
VALVE
PRV PUMP
4
3
2
TPRV PRESSURE REDUCING
VALVE
PRV PUMP
Page 23
KEY:
1 THROUGH 7.5
7.6 THROUGH 17
OVER 17
1
EXPANSION TANK
KEY:
WATER CATEGORY
GRAIN HARDNESS PER GALLON
S = SOFT 1 THROUGH 7.5
7.6 THROUGH 17
N = NORMAL
H = HARD OVER 17
PPM / 17.1 = Grains Per Gallon
5
1
2
EXPANSION TANK