DOMINATOR INSTALLATION AND OPERATION INSTRUCTIONS Page 17
Figure 13 - 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
3-Way Valve
Expansion
Tan k
H-15 Rev 3
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.
5. Boiler pump purging
required. Use terminals
supplied.
6. 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 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 12A - Low Temperature Heat Pump
(See Notes and Adjustment Procedures)
H-3 Rev 3
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.
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