DOMINATOR INSTALLATION AND OPERATION INSTRUCTIONS
Page 16
Figure 12 - Low Temperature Piping with Thermostatic Piping
(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. 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.
Adjustment Procedure To Maintain Inlet Temperature
Above Dew Point
T1-Temp-Min=110° For Atmospheric
T1-Temp-Min=125° Sealed Combustion
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 stabilized. Make fi nal adjustments.
5. Follow same adjustment procedure for sealed combustion.
Figure 11 - Typical Primary/Secondary Piping System
(See Notes)
1
H-1 Rev 2
NOTES:
1. Boiler circuit piping must be sized
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.
Notice: These drawings show
suggested piping confi guration and
valving.
Check with local codes and ordinances
for specifi c requirements.
H-18
