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USE ANTI-SCALD VALVE(S) in the hot water system to reduce the
risks of scalds at points of use such as lavatories, sinks and
bathing facilities.
A change in water temperature in the storage tank lower than the
Tank Temperature Control setting will cause the sensor to close
its contacts and consequently energize the boiler.
If the Tank Temperature Control is out of calibration, replace it with
a new one; do not attempt to fix this control.
WARNING
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO
SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO
THE APPLIANCE.
LOW WATER CUTOFF
A low water cutoff is a safety device which is installed in the boiler
piping to prevent the boiler from firing in the event of inadequate
water levels in the boiler system.
Where required by local code, this optional device is to be installed
in the boiler piping at a level above that of the heat exchanger.
A float type or an electronic probe type low water cutoff may be
used. The manufacturer's installation instructions must be followed.
THERMOMETERS
Thermometers should be obtained and field installed as shown in
the installation diagrams.
Thermometers are installed in the system as a means of detecting
a possible liming condition in the boiler. An increase of 3°C (5°F)
over the normal temperature rise through the boiler is an indication
that lime is present. The term "temperature rise" designates the
difference between the boiler inlet and outlet water temperature.
An increase of 3°C (5°F) above the recorded temperature rise may
signify a liming condition in the coils or heat exchanger. Refer to
CLEANING AND FLUSHING section of this manual for deliming
instructions.
Record temperature rise at initial start-up for future reference.
DRAIN VALVE (Not Supplied)
A drain valve must be obtained and installed on each boiler and
tank for draining purposes, see installation diagrams in this
manual.
CLOSED WATER SYSTEM
This boiler should not be installed in a closed water system without
taking steps to reduce excessive system pressure due to thermal
expansion. Contact the water supplier or local plumbing inspector
on how to control this situation.
Temperature Time to Produce 2nd & 3rd
Setting Degree Burns on Adult Skin
OVER: 170°F (77°C) Nearly instantaneous
160°F (71°C) About 1/2 second
150°F (65°C) About 1-1/2 seconds
140°F (60°C) Less than 5 seconds
130°F (54°C) About 30 seconds
120°F (49°C) More than 5 minutes