Attachment_4_-_GSH_TPS_Pressure_Testing_v2.pdf

TEST PROCEDURE FOR GSH TPS

LOW PRESSURE (STREET PRESSURE) TEST

Check to make sure that the electrical circuits feeding the TPS and pump are turned OFF. There are Three (3) breakers feeding the TPS and pump: The main circuit breaker panel inside the MHU, the circuit breakers inside the TPS, and the mechanical interlock on the rear outside of the

MHU.

Fill the tank with water. Use garden hose with double‐female adapter to connect to the Tank Fill Valve at the top of the tank. (Valve E in photo below).

3 Disconnect the garden hose, close Valve E, and connect the garden hose to Valve D.

4 Open Valve A, Valve C, and Valve D 5 Close Valve B

Check that the pipe cap on the sprinkler drain line underneath the MHU has been removed from the drain line. If the drain pipe still has a cap on it, remove the cap. (The cap is there to prevent insects from getting into the drain pipe during storage and transport.)

7 Open the sprinkler drain valve in the MHU slightly.

Turn on water to garden hose, and allow water to flow into the sprinkler system in the home.

When water begins to flow out of the sprinkler drain line onto the ground beneath the MHU.

Then close the sprinkler drain valve and allow the water to flow into the pipes in the home.

Leave the hose connected, turned on, and the valves set as shown above for at least 10 minutes to allow the system to stabilize.

10 Close Valve C and Valve D. Only Valve A is left open. Turn off the garden hose.

11 Record the pressure shown on Pressure Gauge G.

Starting Pressure

Carefully inspect every sprinkler head in the home, the pipe in the water heater closet, and all visible pipe and Decoshield in the home for leaks. Check for water dripping or running down the walls. Look for drops forming at places where sprinklers are screwed into the pipe, and at joints in the pipe.

13 Wait one hour. Record the pressure shown on Pressure Gauge G.

Ending Pressure

There should be no drop in pressure readings over the test period. If the pressure is lower after the test, look carefully for leaks. Even a single drop can cause a pressure loss.

Common places for leaks: the connection between the TPS hose and the sprinkler pipe, the fittings where the sprinklers are screwed into the system, valves that may not be fully closed, fittings or joints inside the

TPS.

Pressure Drop:

Starting Pressure minus Ending Pressure

After repairing any leaks, repeat steps 8, 9, 10, 11, 12, and 13. Continue checking for leaks and testing until the pressure drop over a one‐hour test time is zero.

16 After the system is shown to be leak free by the test above, proceed to the High Pressure Test

This test should be done before installing cover plates on the sprinklers in the MHU, and before turning on the pump. In cold weather, the heater and the heat trace should be turned ON before putting water into the tank, pipe, or hose.

HIGH PRESSURE (PUMP PRESSURE) TEST

1 Open Valves A, B, and C. Close Valves D, E, F, and H.

Switch the circuit breakers that feed the TPS and pump to ON. (Breakers in the main electrical panel inside the MHU, the mechanical interlock on the rear outside of the MHU, and the breaker in the TPS.) The pump may start as soon as you turn on the power, depending on system pressure. It should turn off automatically in a few minutes. Do not proceed to the next step until the pump has stopped running. If the pump does not start when you turn on the power, go to the next step.

Slowly open the Pump Test Valve – Valve H – fully. Water will flow from the pump and back into the tank. Allow the water to run until the alarm on the front of the TPS sounds, testing the alarm.

While the pump is running, record the pressure shown on Pressure Gauge G. This is the maximum pressure that the system should experience.

Pump Running

Pressure

When the alarm sounds, SLOWLY turn the Pump Test Valve – Valve H – OFF. The pump will run momentarily and should shut off soon.

After the pump stops running, record the pressure shown on Pressure Gauge G. This is the pressure that will be used for the test.

Carefully inspect every sprinkler head in the home, the pipe in the water heater closet, and all visible pipe and Decoshield in the home for leaks. Check for water dripping or running down the walls. Look for drops forming at places where sprinklers are screwed into the pipe, and at joints in the pipe.

8 Wait one hour. Record the pressure shown on Pressure Gauge G.

Ending Pressure

There should be no drop in pressure readings over the test period. If the pressure is lower after the test, look carefully for leaks. Even a single drop can cause a pressure loss.

Common places for leaks: the connection between the TPS hose and the sprinkler pipe, the fittings where the sprinklers are screwed into the system, valves that may not be fully closed, fittings or joints inside the TPS.

Pressure Drop:

minus Ending Pressure

After repairing any leaks, repeat steps 4 through 8. Continue checking for leaks and testing until the pressure drop over a one‐hour test time is zero.

When the system passes the pressure test, set up all valves for normal operation:

Open Valves A, B, and C. Close Valves D, E, and H.

12 Set the temperature controller following the manufacturer’s instructions.

GSH TPS unit

A: System Valve

B: Pump Suction Valve

C: Pump Isolation Valve

D: System Drain Valve

E: Tank Fill Valve (not visible in photo)

F: Tank Drain Valve (behind hose)

G: Pressure Gauge

H: Test/Recirculation Valve (not visible in photo)

D

C

B

A

E

F G

H