7
WARNING
Do not install a manual shut off valve
between the relief valve and the discharge.
Doing so could cause serious injury or death
if the relief valve released and the manual
valve was closed. This would cause excessive
buildup of pressure in the storage tank which
could result in an explosion.
Drain
The tanks’ drain connection must be piped to a suitable floor
drain. Brass drain cocks are acceptable. A brass full port ball
valve is recommended to improve water flow.
Completing installation
Installation of the Lochinvar Hot Water Storage Tank is now
complete. All documentation supplied with the unit should
be passed along to maintenance personnel for future reference.
Piping the relief valve
(Relief valve is field
supplied)
All Lochinvar SJS Storage Tanks are equipped with a relief valve
tapping on the tank. The valve should be piped to a discharge
line leading to a suitable drain. Piping the pressure relief valve
to a suitable drain will prevent both water and heat damage to
the unit, as well as reduce the risk of injury from released heated
water. The pipe must be of adequate size to properly handle the
capacity of the relief valve and discharge line.
Check local codes to assure compliance. If a check valve has
been installed on the inlet water line, thermal expansion may
take place causing build up of excessive pressure when the water
is being heated. This expansion will cause the relief valve to
open, releasing hot water to the discharge line. A properly sized
expansion tank must be installed to protect the system from
water expansion.
2
Installation
(continued)
Installation and Operation Manual
®
