Installation / Operation Instruction Manual

8
Key to symbols and safety instructions
RTG-K-199/160N/X2 – 6 720 813 642 (2022/06)
WARNING:
Fire danger!
▶ Keep appliance area clear and free
from combustible materials, gasoline
and other flammable vapors and
liquids.
NOTICE:
▶ Do not obstruct the flow of
combustion and ventilation air.
WARNING:
Risk of scalding and property
damage.
▶ Precautions must be taken prior to
manually operating the pressure relief
valve to avoid contact with hot water
discharged from the pressure relief
valve and to prevent water damage.
NOTICE:
Appliance damage!
▶ Label all wires prior to disconnection
when servicing controls. Wiring
errors can result in improper and
dangerous operation. Verify proper
operation after servicing.
WARNING:
System damage!
▶ 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.
WARNING:
Personal Injury from toxic chemicals.
▶ Toxic chemicals, such as those used
for boiler treatment, shall not be
introduced into the potable water
used for space heating.
WARNING:
Personal Injury from toxic chemicals.
▶ A water heater which will be used to
supply potable water shall not be
connected to any heating system or
component(s) previously used with a
nonpotable water heating appliance.