Trin & Stor
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Installation and Operation Instructions Storage Tanks
10
4.0 START UP AND CHECK OUT
Operational Checklist
1.
Ensure all electrical connections are made correctly and no high voltage wires are exposed.
2.
Ensure the Tank Sensor is correctly installed, and the Trinity Lx Water Heater is correctly reading the tank
temperature. In lieu of the Tank Sensor ensure the Thermostat demand is properly signaling the boiler to
operate.
3.
Set the Water Heater to the desired temperature.
4.
Ensure piping system is free of leaks and that air has been purged from system.
5.
Initiate a call for hot water by opening hot water taps on domestic water fixtures.
6.
Verify that the water heater and recirculation pump starts when the tank temperature drops below the
“Demand On temperature” and shuts down when the tank temperature rises above the “Demand Off
temperature”. See Figure 3-2.
7.
Check for proper operation of relief valve by opening it manually.
8.
If relief valve functions continuously during normal operation, the expansion tank may need to be upsized.
5.0 ANNUAL MAINTENANCE AND INSPECTION
Inspection Checklist
1.
Perform a visual inspection of all valves, drains, and system piping for signs of leaks.
Maintenance Checklist
1.
Verify maximum water temperature at hot water fixtures to verify mixing valve temperature settings.
2.
Manually operate T&P relief valve by moving lever to open position until hot water is released and allow it to
snap close. If closed relief valve continues to leak, close cold water inlet, drain tank, and replace relief valve.
3.
If relief valve functions continuously during normal operation, the expansion tank may need to be upsized.
4.
Ensure the water heater and/or solar thermal system is maintained in accordance with its installation manuals.
5.
Check function of field-installed controls, thermostats, and circulators.
6.
Check tank PH and chloride levels to determine if water chemistry is within the specified range.
7.
Any additional procedures required by local codes.
Draining the Storage Tank
1.
Disconnect the power supply to the heat source.
2.
Purge hot water from the tank by opening a hot water faucet.
3.
Close the cold water supply shut off valve.
4.
Open the drain valve and divert water in tank to alternate storage location or floor drain.
5.
Open highest hot water faucet to allow air to enter the system.
6.0 PARTS LIST
Table 6-1
Storage tank
Item
Part #
Models
Description
Installers requiring
technical assistance
can contact NTI directly at 1-800-688-2575.
1
84156
ST80, ST120
Relief Valve, T&P, ¾", 150 psi
2
84632
ST80, ST120
Tank Sensor
3
84158
ST80, ST120
TPI Control Thermostat
