Installation manual

2120
Examine venting system to insure system is clear of blockages, debris, and
damage.
Clean inside of unit by vacuuming or blowing out dust that collects in the
unit. The burner and heat exchange are sealed units and should not be
opened.
Visual flame inspection
Lime scale cleaning (if required), see procedure in Maintenance
Procedures that follow.
MAINTENANCE PROCEDURES
BURNER INSPECTION AND CLEANING
1. The burner must flame evenly over the entire surface of the burner head when
operating correctly.
2. The flame should burn with a clear, blue, stable flame.
3. Presence of a yellow flame or of black deposits on the burner head indicates
cleaning and/or burner replacement should occur. THIS MUST BE DONE BY A
TRAINED SERVICE PROFESSIONAL ONLY.
BLOWER MOTOR MAINTENANCE
1. The Blower Motor is permanently lubricated and does not need periodic
lubrication.
2. If Blower Motor fails it should only be replaced by trained service professionals
only.
RELIEF VALVE DISCHARGE
If a relief valve discharges periodically, this may be due to thermal expansion in a
closed water supply system. Contact the water supplier or local plumbing inspector
on how to correct this situation. Do not plug the relief valve.
LIME SCALE CLEANING PROCEDURE
Materials required:
- Five gallon container .
- Four gallons of virgin food grade white vinegar or virgin food grade citric acid.
- Small inline recirculation pump capable of circulating 2 - 4 gpm (8 – 16 l/m).
- Set of hoses for connecting recirculation pump to and from the pump and the five
gallon container.
Refer to the figure on following page while performing this procedure.
1. Disconnect electrical power to the water heater.
2. Close the shutoff valves V3 and V4 on both the hot water and cold water lines.
3. Connect a hose H1 form the pump outlet to the cold water line V2 into the heater.
4. Connect drain hose H2 from the hot water outlet line V1 and route into five gallon
recirculation container.
5. Pour approx. four (4) gallons of virgin, food grade, white vinegar or citric acid into
pail.
6. Place the pump suction hose H2 into the cleaning solution