A.O. Smith ITS - 300 Installation, User And Service Manual page 31

2.3.2 Hot Water side
See (B) in the installation diagram
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1. Optional: fit a temperature gauge (12) so you can check the temperature of the tap
water.
2. Fit the T&P valve (3).
3. Fit a stop valve (4) in the hot water outlet pipe for servicing.
4. If a circulation pipe is required, continue by installing the circulation pipe
"Circulation pipe").
Circulation pipe
2.3.3
See (C) in the installation diagram
If an immediate flow of hot water is required at draw-off points, a circulation pump can be
installed. This improves comfort, and reduces water wastage.
1. Fit a circulation pump (6) of the correct capacity for the length and resistance of the
circulation system.
2. Fit a non-return valve (5) after the circulation pump to guarantee the direction of
circulation.
3. Fit two stop valves for servicing (4).
4. Connect the circulation pipe according to the installation diagram
diagram").
ITS 300
(2.1 "Installation diagram").
(2.1 "Installation diagram").
(2.3.3.
(2.1 "Installation
31