SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
Page 14
Figure 9 - Multiple Boiler Piping
(See Notes)
Figure 8A - Low Temperature Piping with Thermostatic Valve
(See notes and adjustment procedures)
Operated Valve
Air Vent
Pressure Switch
Aquastat Union
Gas Pressure
Regulator
Automatic
Thermometer
Flow Switch
Pressure
Relief Valve
Reducing Valve
Self-Operated
Check Valve
Pressure
Valve
Pump
Motorized Valve
Solenoid
Ball Valve
Bufferfly Valve
Angle Valve
Gate Valve
Globe Valve
Balance Valve
Backflow-
Prevention
Device
3-Way Valve
Expansion
Tank
NOTES:
1. Boiler circuit piping must be large enough to handle
maximum fl ow through unit.
2. Boiler pump sized to boiler design fl ow requirements.
3. All boilers furnished with factory mounted outlet water
temperature gauge.
4. Boiler pump purging required. Use terminals supplied.
5. Secondary loop pipe diameter must be sized large enough to
handle maximum fl ow through all units.
Notice: These drawings show suggested piping confi guration and valving.
Check with local codes and ordinances for specifi c requirements.
H-18 Rev 2
NOTES:
1. For pump selection consult factory.
2. Boiler pump sized to boiler and
thermostatic 3-way valve design
fl ow requirements.
3. Boiler circuit piping must be sized
large enough to handle maximum
fl ow through unit.
4. All boilers furnished with factory
mounted outlet water temperature
gauge.
5. Boiler pump purging required. Use
terminals supplied.
6. Valve is precalibrated for 140°F
return temperature.
Notice: These drawings show
suggested piping confi guration and
valving.Check with local codes and
ordinances for specifi c requirements.
H-15 Rev 4