20
THREE UNIT MANIFOLD KIT (PART NO. 78693)
FOUR UNIT MANIFOLD KIT (PART NO. 78694)
CHECK LIST AND SERVICE
INFORMATION
IMPORTANT
The installer may be able to observe and correct certain problems which
might arise when the unit is put into operation or when it is refired after a
prolonged shut-down. HOWEVER, it is recommended that only qualified
servicemen, using appropriate test equipment, be allowed to service the
heater.
DANGER
BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE
OR APPROPRIATE WHEN CHECKING EQUIPMENT.
ELECTRICAL WIRING REPLACEMENT
If any of the original wiring, as supplied with the appliance, must be
replaced, it must be replaced with 16 AWG, or greater, copper conductor
with 600V, 105°C rated, thermoplastic insulation.
NOT ENOUGH OR NO HOT WATER
1. Be certain the oil burner electrical disconnect switch serving the water
heater is in the ON position.
MANIFOLD KIT COMMERCIAL OIL FIRED WATER HEATERS
Precision cut type "L" all copper A.O. Smith manifold kits assure water
flow balance of all units. Without this balance, the full water heating and
storage potential of the system cannot be achieved. Plus, the units with
the higher water flow may have a shortened life. Unions and T & P
valves shown in piping diagrams are not included in the manifold kits.
Dimensions shown are for minimum space occupied by complete
assemblies. Service space in front of units must be added.
DANGER:
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURES AT
FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 11. IF
HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED
TO FIXTURES.
TWO UNIT MANIFOLD KIT (PART NO. 78692)
2. Check the fuses.
•
The oil burner electrical disconnect switch usually contains fuses.
3. The capacity of the heater may have been exceeded by a large demand
for hot water.
•
Large demands require a recovery period to restore water
temperature.
4. Colder incoming water temperature will lengthen the time required to
heat water to the desired temperature.
•
If the heater was installed when incoming water temperature was
warm, colder water creates the effect of less hot water.
5. Look for hot water wastage and leaking or open hot water faucets.
6. Sediment or lime scale may be affecting water heater operation. Refer
to MAINTENANCE for details.
7. Heater or burner may be dirty.
•
Clean all heater flue pipes and flue connector.
•
Have burner properly cleaned and readjusted.
