Storage Tanks
Installation and Operation Instructions
│
Trin & Stor
7
Figure 2-1 Storage Tank Dimensions
Installation Checklist
1.
Install piping as per National and local codes.
2.
Mark the water supply for future reference.
3.
Install a thermostatic mixing valve on the hot
water outlet of the storage tank.
4.
Install hot water heater plumbing connections as
per the water heater manufacturer’s instructions.
5.
Install T&P relief valve on tank in accordance
with local codes.
6.
Ensure any valves installed between the
expansion tank and storage tank inlet are left in
the OPEN position during normal operation.
7.
Ensure no valve is installed between the relief
valve and discharge pipe.
8.
Ensure discharge piping material used is rated to
withstand temperatures up to 250
o
F (120
o
C).
9.
Direct discharge to a safe
area (drain) where hot
water or steam will not cause damage or injury
.
10.
Terminate discharge pipe 6"-12" above the
floor. Do not connect discharge pipe directly to
a drain.
11.
Typical discharge pipe diameter ¾". Maximum
pipe length is 15 feet with 2 or less elbows.
12.
Cut discharge end of pipe at a 45
o
angle to
reduce the risk of being blocked or capped.
13.
Verify with local codes if a backflow preventor
or thermal expansion control device is required.
14.
Install a domestic expansion tank downstream of
the backflow preventor (control device).
15.
Install the domestic expansion tank on the cold
water supply.
16.
Flush the tank thoroughly before filling the tank
in preparation to heat water.
Table 2-3 Storage Tank Dimensions
Filling the Storage Tank
Model
Dimensions (inches)
1. Thoroughly flush the storage tank by drawing
three (3) times the tank’s volume through it.
A
B
C
D
E
F
G
ST80
72
5
/
8
59
1
/
2
59
1
/
2
11
5
/
8
10
5
/
8
2
3
/
8
23
7
/
8
2. Verify water connections completed.
ST120
64
3
/
4
52
3
/
8
52
3
/
8
13
1
/
4
12
1
/
4
2
3
/
8
28
7
/
8
3. Close drain valve. Open the highest hot water
faucet.
Table 2-4 Storage Tank Connections
Model
Connection Port Sizes
4. Open valve on cold water inlet and fill system.
T&P RV Hot Out
Sensor
HWH In
HWH Out
5.
Fill until a steady stream of water flows from the
hot water faucet.
1
2
3
4
5
ST80
1"
F
1
1
/
2
" M
Well
1
1
/
2
" M
1
1
/
2
" M
6. Close the hot water faucet.
ST120
1"
F
1
1
/
2
" M
Well
1
1
/
2
" M
1
1
/
2
" M
7.
Ensure the storage tank is filled and piping is
free of leaks before proceeding to Operational
Checklist in Section 4.0.
General Notes:
- Connections are NPT unless noted otherwise.
- The sensor connection is a friction fit immersion well.
