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Dayton Operating Instructions and Parts Manual
Model 3VH18A - Propane Model 3VH19A - Natural Gas
General Safety Information (Continued)
•Never move, handle, or service a hot or operating heater. Severe burns may result. You must wait 20 minutes after turning heater off.
•To prevent injury, wear gloves when handling heater.
•Never attach duct work to heater.
•Do not alter heater. Keep heater in its original state.
•Do not use heater if altered.
•Turn off gas supply to heater when not in use.
•Use only original replacement parts. This heater must use
Theory of Operation
THE FUEL SYSTEM
Propane Model: The hose/regulator assembly attaches to the propane gas supply. This provides fuel to the heater.
Natural Gas Model: The gas supply attaches to the heater by a minimum 3/4 inch i.d. hose or flexible connector. User must supply hose or flexible connector. The length should be no more than 10 feet long. The natural gas moves through the regulator and out the nozzle.
THE IGNITION SYSTEM
The piezo ignitor lights the main burner.
THE AUTOMATIC CONTROL SYSTEM
This system causes the heater to shut down if the flame goes out.
Product Identification
Top
Shell
Thermocouple
Ignitor
Electrode
Burner
Tube
Base
Shield
Base
Piezo Ignitor Button
Figure 2 - Product Identification
Emitter
Upper Shield
Lower Shield
Control | Regulator for | |
Knob | ||
Natural Gas | ||
|
Valve
Inlet
Hose/Regulator
Assembly for
Propane Gas
®
3
Version B - For Reduction | G016.J |