SPECTRUM INSTALLATION AND OPERATING INSTRUCTIONSPage 12
Figure 7 - Multiple Boiler Piping (See notes)
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
Va lve
Pump
Motorized Valve
Solenoid
Ball Valve
Bufferfly Valve
Angle Valve
Gate Valve
Globe Valve
Balance Valve
Backflow-
Prevention
Device
H-15 Rev 3
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.
Adjustment Procedure
To Maintain Inlet Temperature
Above Dew Point
T1-Temp-Min+110° For Atmospheric
T1-Temp-Min=125° Sealed Combusion
1. Turn heater on and open valves A & B.
2. After steady-state operation, if T1 is less
than Temp-Min slowly close valve B until
T1 climbs to desired operating temperature
above Temp-Min.
3. If T1 is greater than desired operating
temperature, slowly close valve A to adjust to
lower desired temperature above Temp-Min.
4. Check after system operating temperature
has stabiized. Make fi nal adjustments.
5. Follow same adjustment procedure for
sealed combustion.
1
Figure 6A - Low Temperature Piping
(See Notes and Adjustment Procedures)
H-3 Rev 2
1
5
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