Laars heating systems, Page 16 – LAARS Rheos RHCV - Install and Operating Manual User Manual
Page 16
LAARS Heating Systems
Page 16
THERMOMETER
GLOBE VALVE
CHECK VALVE
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
LEGEND
VALVE
TEMPERATURE
SENSOR
3-WAY VALVE
NOTES:
7. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT JOB SITE
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING CHECK
PRV
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS
WATER CATEGORY GRAIN
HARDNESS PER GALLON
S = SOFT
1 THROUGH 7.5
N = NORMAL 7.6 THROUGH 17
H = HARD
OVER 18
17.1 PARTS PER MILLION
= 1 GRAIN HARDNESS PER GALLON
KEY:
2
SUPPL
Y
RECIRC.
CWMU
1. OPTIONAL CWMU & RECIRC. LINE LOCATION.
2. WHEN USING INTERMITTENT PUMP AND EM LOCATE REMOTE AQUASTAT
WELL IN LOWER 1/3 OF TANK WITH HEAT SENCEING COMPOUND.
3. BACK FLOW PREVENTER MAY BE REQUIRED CHECK LOCAL CODES.
4. THERMAL EXPANSION TANK MAY BE REQUIRED CHECK LOCAL CODES.
5. WHEN USING OPTIONAL FACTORY MOUNTED PUMP, MAX PIPE LENGTH
30' TOTAL, 6-90° ELBOWS , FULL PIPE SIZE.
6. THIS DRAWING DEPICTS A TWO-PASS HEAT EXCHANGER.
5
TPRV
3 4
2
1
THERMOMETER
GLOBE VALVE
CHECK VALVE
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
LEGEND
VALVE
TEMPERATURE
SENSOR
3-WAY VALVE
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING CHECK
PRV
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS
WATER CATEGORY GRAIN
HARDNESS PER GALLON
S = SOFT
1 THROUGH 7.5
N = NORMAL 7.6 THROUGH 17
H = HARD
OVER 18
KEY:
TPRV
6. THIS DRAWING DEPICTS A TWO-PASS HEAT EXCHANGER.
30' TOTAL, 6-90° ELBOWS , FULL PIPE SIZE.
5. WHEN USING OPTIONAL FACTORY MOUNTED PUMP, MAX PIPE LENGTH
4. THERMAL EXPANSION TANK MAY BE REQUIRED CHECK LOCAL CODES.
3. BACK FLOW PREVENTER MAY BE REQUIRED CHECK LOCAL CODES.
WELL IN LOWER 1/3 OF TANK WITH HEAT SENCEING COMPOUND.
2. WHEN USING INTERMITTENT PUMP AND EM LOCATE REMOTE AQUASTAT
1. OPTIONAL CWMU & RECIRC. LINE LOCATION.
8. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT JOB SITE
NOTES:
2
5
SU
PPL
Y
CIR
C. R
ETU
RN
2
3
CW
MU
4
1
5
7. COMMON PIPING MUST BE SIZED FOR MAXIMUM COMBINED HEATER FLOW.
7
7
17.1 PARTS PER MILLION
= 1 GRAIN HARDNESS PER GALLON
Figure 9. Water Heater Piping — One Heater, One Tank.
Figure 10. Water Heater Piping — Multiple Heaters, One Tank.