Page 23
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:
5. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT
JOB SITE
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.
RECI
RC.
CW
MU
SU
PPL
Y
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
2
3
4
1
CHECK VALVE
THERMOMETER
TEMPERATURE
SENSOR
GLOBE VALVE
EXPANSION TANK
3-WAY VALVE
VALVE
PRESSURE REDUCING
VALVE
PUMP
PRV
TPRV
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.
NOTES:
6. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT
JOB SITE
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.
REC
IRC
.
CW
MU
SU
PP
LY
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
2
3
4
1
5
CHECK VALVE
THERMOMETER
TEMPERATURE
SENSOR
GLOBE VALVE
EXPANSION TANK
3-WAY VALVE
VALVE
PRESSURE REDUCING
VALVE
PUMP
PRV
TPRV
Mighty Therm
2
(200, 300, 400) Install & Operating
