6
Maintenance
(continued)
Hot Water Generator Installation and Operation Manual
Temperature/pressure gauge (tank)
(optional) - replacement
If the temperature/pressure gauge for the water tank is not
functioning correctly and must be replaced, follow the
procedure outlined below.
WARNING
The combination of electricity and water
can pose a very dangerous situation. Turn
off / disconnect all electric power before
attempting any maintenance procedure.
1.
Follow Steps 1 through 5 of the shutdown procedure
(page 10) to take the unit off-line before attempting to
replace the water temperature/pressure gauge.
2.
Carefully unscrew the water temperature/pressure gauge
from the port in the tank.
3.
Install the new gauge by screwing it into the port in the
tank.
Follow recommendations contained in the
manufacturer’s documentation, local codes, or accepted
contractor practices as to the use of joint compound or
sealer at the connections.
4.
Follow the startup procedure (page 10) to put the unit
back on-line. Carefully check all connections for any
sign of leakage.
2.
Assure that the energy source, condensate / water return
line, cold water inlet, and hot water outlet have been shut
off; that the tank has been completely drained; that the
pressure has been bled from both the water and energy
source systems; and that all components and surfaces
have cooled.
3.
Carefully break the joint between the unit and the line or
valve to be replaced.
4.
Remove the section of line or valve to be replaced.
5.
Replace the damaged section of line or valve.
6.
Reconnect the line or valve to the unit.
Follow
recommendations contained in the manufacturer’s
documentation, local codes, or accepted contractor
practices as to the use and / or type of joint compound or
sealer at the connections.
7.
Follow the startup procedures (page 10) to put the unit
back on-line. Carefully check all connections for any sign
of leakage.
Single solenoid safety system (optional) -
inspection and replacement
The single solenoid safety system closes the steam (or boiler
water) control valve in an over-temperature condition. The
system should be checked semi-annually. (See manufacturer’s
documentation for the solenoid safety system provided with
the unit for specific inspection intervals and test routine.) If
the system is found to be malfunctioning and must be
replaced, follow the procedure outlined below.
WARNING
The combination of electricity and water
can pose a very dangerous situation. Turn
off / disconnect all electric power before
attempting any maintenance procedure.
1.
Follow Steps 1 through 5 of the shutdown procedure
(page 10) to take the unit off-line before attempting to
replace the single solenoid safety system.
2.
If the system is electrically activated, turn off the power
and disconnect the electric leads from the safety system.
3.
Remove the solenoid valve from the piping or high limit
thermostat from mounting.
4.
Mount the new safety system.
5
Reference the manufacturer’s documentation for the
safety system that was supplied with your unit for
additional installation / setup instructions.
6.
Follow the startup procedures (page 10) to put the unit
back on-line. Carefully check all connections for any sign
of leakage.
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