SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
Page 13
Figure 7 - Typical Primary/Secondary Piping System
(See Notes)
Figure 8 - Low Temperature Piping
See Notes and Adjustment Procedures
Pressure
Reducing
Valve
Aquastat
Thermometer
Pressure
Relief Valve
Check Valve
Pump
Valve
Epansion
Tank
Circuit Setter
Union
Air Vent
Automatic
Backflow-Prevention
Device
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 final adjustments.
5. Follow same adjustment procedure for sealed combustion.
Adjustment Procedure To Maintain Inlet Temperature
Above Dew Point
T1-Temp-Min=110
°
For Atmospheric
T1-Temp-Min=125
°
Sealed Combustion
1
1
Notice:Thesedrawingsshowsuggestedpipingconfigurationandvalving.
Checkwithlocalcodesandordinancesforspecificrequirements.
NOTES:
1.Boilercircuitpipingmustbesizedlargeenoughtohandle
maximumflowthroughunit.
2.Boilerpumpsizedtoboilerdesignflowrequirements.
3.Allboilersfurnishedwithfactorymountedoutletwater
temperaturegauge.
4.Boilerpumppurgingrequired.Useterminalssupplied.
H-1 Rev 2
H-3 Rev 2
