Operator`s manual
PUREHEAT™ HYDRONIC AIR HEATER OPERATOR’S MANUAL – SECTION 1 
V. 2, Rev. 09/01/06  © 2006 Ground Heaters, Inc.  1- 3 
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1.2 INTERNAL COMPONENTS
 (Photos 1-2 through 1-6) 
1.2.1  Heater with Burner Options
 (Photo 1-2) 
The following components are accessed via the side door: 
1. Main Control Panel  10.  Main Pump 
  2. Hydronic Heater and Expansion Tank (not shown)  11.  Rewind Foot Pedal 
3. Natural Gas (NG)/Liquid Propane (LP) Burner  12.  Return Temperature Gauge 
4. NG/LP Gas Train  13.  Pressure Gauge 
5. NG/LP Gas Pressure Regulator   14.  Return Flow Indicator 
  6. NG/LP Main Gas Valve  15.  Operator’s Manual Holder 
  7. NG/LP Secondary Gas Valve  16.  Performance Monitoring Power Receptacle 
  8. NG/LP Pilot Gas Valve  17.  Low Level Shutdown Device 
  9. Hose Reel with 1,000 ft (305 m) 1 in. ID  18.  HTF Sight Gauge and Decal 
   Red Circulation Hoses with Quick-Connects (QCs) 19.  Optional Auxiliary Pump Panel (not shown) 










