HTP SSC-119 - Manual (Page 17)

17
LP-65 Rev. 3.24.14
RELIEF AND DRAIN VALVE
Relief Valve
Lift and release the relief valve on the water heater. Make
certain that the valve operates properly by allowing several
gallons to flush through the discharge line. Replace if valve is
blocked or does not operate properly.
NOTE: DISCHARGED WATER MAY PRESENT A SCALD
RISK. TAKE CAUTION WHEN OPERATING RELIEF VALVE.
Drain Valve Open the drain valve and drain a few quarts of water from the
bottom of the tank to flush any hard water deposits. Replace if
valve is blocked or does not operate properly.
NOTE: DRAINED WATER MAY PRESENT A SCALD RISK.
TAKE CAUTION WHEN OPERATING DRAIN VALVE.
FINAL INSPECTION
Check list
Verify that you have completed entire check list. WARNING:
FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY
OR DEATH
Homeowner Review what you have done with the homeowner.
INITIAL AND DATE AFTER INSPECTION/SERVICE. CONTINUE INSPECTIONS
ANNUALLY BEYOND THE FOURTH YEAR.
Table 4 - *If applicable to system.
TROUBLESHOOTING
HOT WATER HAS A ROTTEN EGG ODOR
PROBLEM POSSIBLE SOLUTION
Supply water has high sulfate or mineral content
Check with water quality specialist in your area. Have water supply
analyzed. Address water quality issues according to specialist’s
recommendations.
NO HOT WATER
PROBLEM POSSIBLE SOLUTION
Zone valve not opening Check or replace.
Circulator not operating Check or replace
Tank control set too low Raise tank temperature* (SEE NOTE BELOW)
Boiler control set too low Raise boiler temperature
Wiring incorrect Recheck wiring
Tank control failure Replace control
Air trap in loop Purge air
NOT ENOUGH HOT WATER
PROBLEM POSSIBLE SOLUTION
Zone valve restriction 1” full bore replace zone valve
Circulator arrow reversed Reverse circulator
Boiler temperature too low Raise boiler temperature
Boiler sized too small Check sizing chart
Tank sized too small Check sizing chart
Demand flow rate too high
Check sizing chart
Install mixing valve, raise tank temperature*
Install flow regulator
Air trap in loop Purge to remove air
Heat and tank come on together
Recheck wiring or coincidence
Draw tank down and lower thermostat. Recheck.
Not enough space heat Boiler sized too small. Consult chart.
Slow recovery Circulator head capacity too low
T & P VALVE DISCHARGES
PROBLEM POSSIBLE SOLUTION
Tank temperature too high Lower temperature on tank
Water expands when heated Install expansion tank
Water pressure too high Install pressure reducing valve
HOT TUBS, SPAS, MULTIPLE SHOWERS, HIGH DEMAND
PROBLEM POSSIBLE SOLUTION
Pressure too low Check line pressure for restriction
Recovery of tank slow Slow startup boiler. See chart.
Not enough hot water
Boiler sized too small. See chart.
Check flow rate and compare to chart
Demand too great. Check flow rates and compare to chart. Install
mixing valve and/or flow restricting valve and raise tank and boiler
temperature*.
Table 5 – See Scald Warning Below