HTP SSU-20PH - Manual (Page 6)

6
LP-21A Rev. 3.24.14
Use two wrenches when tightening water piping at heater. Use one wrench to prevent the heater return or supply line from
turning. Failure to prevent piping connections from turning could cause damage to heater components.
C. PIPING DETAIL
Figure 2 – Water Heater Piping
PART 4 – HEATER CONTROL
A. WIRING THE CONTROL
If the pool heater control is to be located outdoors, it must
be located in a covered area, protected from the rain and
sun. However, the control transformer must be kept
indoors. A ground fault outlet is mandatory. The control
probe needs to be installed onto the inlet line of the pool
heater. This probe monitors incoming water temperature
to the pool heater only when the pool filter is running.
See Figure 3 for control wiring.
At the beginning of the season, it may be necessary
during start-up to leave the pool filter on for a few days to
heat the pool. See Table 2 to determine actual heating
time.
Figure 3 – Control Wiring