nne
co
er tu
e gas
o
ers
water
eaters –
o
er
anua
21
Figure 14 Typical Water Heating Piping (DW Models only)
(See Notes)
Figure 15 Multiple Water Heating Piping (DW Models only)
(See Notes)
D-4 Rev 6
D-1 Rev 6
NOTES:
1. Optional cold water make up and recirculation line location.
2. When using intermittent pump and pump delay, locate remote aquastat
well in lower 1/3 of tank. Install aquastat with heat sensing compound.
3. Thermal expansion tank may be required, check local codes.
4. When using optional factory mounted pump, max pipe length 30’ total, 6-90° elbows, full pipe size.
5. CAUTION: MEASURE WATER HARDNESS AND pH AT JOB SITE.
The pH and water hardness must be measured before selecting heat exchanger and pump.
Consult the Heat Exchanger Graph and Pumping Performance Table before making selection.
6. Common piping must be sized for maximum combined heater ow.
7. Hot water tanks should be equipped with a combination temperature & pressure relief valve.
8. MA Code requires an 1/8” hole in check valve to compensate for thermal expansion.
Notice: These drawings show suggested piping con guration and valving.
Check with local codes and ordinances for speci c requirements.
SELF BALANCING DOUBLE REVERSE
RETURN MAKE-UP & SUPPLY, CIRCULATION
1
2
3
2
7
7
6
6
8
4
4
Attention:
Not all RBI stock storage tanks
incorporate this tapping: See Note 1.
Operated Valve
Reducing Valve
Self-Operated
Check Valve
Pressure
Valve
Pump
Motorized Valve
Solenoid
Ball Valve
Bufferfly Valve
Angle Valve
Valve
Globe Valve
Balance Valve
Air Vent
Pressure Switch
Aquastat Union
Gas Pressure
Regulator
Automatic
Thermometer
Flow Switch
Pressure
Relief Valve
Vacuum
Relief Valve
Temperature &
Pressure
Relief Valve
Drain Valve
(Typ.)
2
3
1
4
7
8
Attention:
Not all RBI stock storage tanks
incorporate this tapping: See Note 1.
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