Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
Fuel Nozzle
(0.35 GPH)
Combustion
Chamber
Fuel Filter
(10 Micron)
small orifice
8.1 General Recommended Maintenance
Section 8: Diesel-Burner Service, Maintenance, and Repair Information
General
Recommended
Maintenance
Figure 9
Monthly
Check
the Hydro-Hot's water and antifreeze solution to ensure that it is at
the proper level. Do this by visually checking the coolant level in the Hydro-
Hot's Expansion Tank, reference Figure 1. This should be checked only
when the Hydro-Hot is at maximum operating temperature (i.e. when the
Diesel-Burner cycles OFF), "HOT".
WARNING: When the Hydro-Hot is at maximum operating temperature
(HOT), DO NOT loosen the Radiator Cap. If removed, scalding by hot
vapor or coolant could result.
If
the coolant needs replenishing, fill the Hydro-Hot's Expansion Tank to the
FULL HOT level mark. Be sure to reference the Hydro-Hot "Owner's
Manual" for the proper antifreeze type and mixture. If coolant frequently
needs replenishing, please contact our Technical Department at 1-800-685-
4298 for assistance.
Annually
WARNING: Before cleaning or servicing, disconnect all power sup-
plies.
To keep your Hydro-Hot running smoothly, it is ideal to have the Diesel-
Burner tuned-up annually. A tune-up should consist of a new Fuel Nozzle
and Fuel Filter, along with a thorough cleaning of the Combustion Chamber,
if necessary (reference Figure 9). To ensure maximum Diesel-Burner
performance, always use the recommended Fuel Nozzle and Fuel Filter
(i.e. 10 Micron) when replacing these parts. Reference Section 10 for
spare parts information.
NOTE:
Be sure to use care when handling the Fuel Nozzle. Oils and/or
small dust or dirt particles from your hands may plug the nozzle's small
orifice. A partially plugged orifice will restrict fuel flow, which will affect
the combustion process of the Diesel-Burner (i.e. excessive smoking).
CAUTION:
Operating the Hydro-Hot's Diesel-Burner or the 120 VAC
Electric Heating Element, without the water and antifreeze solution, will
cause serious damage to the heater.
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