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3. Close the inspection cover.
4. Set electric switch to “ON” position. The burner should
start.
5. Make the air adjustment and take the necessary
combustion test readings as specified by the burner
manufacturer. The sealing screw under the inspection
cover can be removed to view the flame (if applicable).
6. Re-install the sealing screw and close the inspection cover
(307, 307V and 507 only).
GASKET
INSPECTION
PORT COVER
WATER HEATER
CASING
SEALING SCREW
INSPECTION
PORT
Figure 13. Inspection Port (307, 307V, 507)
INSPECTION
PORT COVER
WATER HEATER
CASING
INSPECTION
PORT
Figure 14. Inspection Port (317, 517, 657, 717)
WARNING
Models 307, 307V and 507 require a sealed
combustion chamber during operation. Make
sure the inspection port is sealed with the
sealing screw, cover, and gasket.
Water Temperature Regulation
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
Temperature limiting devices
such as mixing valves must
be installed when required
by codes and to ensure safe
temperatures at fixtures.
BURN
HOT
HOT
DANGER
Once installed, the operation will be completely automatic.
The thermostat (aquastat) on the water heater is adjustable
and will maintain water at the desired temperature.
Set the tank thermostat as low as possible to provide an
adequate supply of hot water. This will conserve oil and extend
the life of the tank.
Water Temperature
°F
Time to Produce a
Serious Burn
120
More than 5 minutes
125
1½ to 2 minutes
130
About 30 seconds
135
About 10 seconds
140
Less than 5 seconds
145
Less than 3 seconds
150
About 1½ seconds
155
About 1 second
Table 3. Scald Times
Refer to instructions provided with the aquastat to adjust the
temperature setting.
