Laars Lite 2 LC Installation And Operation Manual - page 9
Model LC (Australia) Pool and Spa Heater
Page 7
Figure 9. Typical Installation
IMPORTANT: Equip the chlorinator with an
antisiphoning device so that chlorine will not siphon
into the heater after the pump shuts off.
Wire the chlorinator so it cannot operate unless
the filter pump is running. If the chlorinator has an
independent clock control, be sure the filter and
chlorinator clocks are synchronized.
If the chlorinator is equipped with its own pump,
install it so that it introduces the chlorine downstream
from the heater, and, if possible, below the level of the
heater outlet fitting.
2L. Temperature Rise
When the installation is complete, the installer
should take a temperature rise. Use the figures in Table
5 to confirm proper water flow through the heater.
An automatic, built-in bypass valve maintains
proper flow through the heater at flow rates up to 475
liters per minute (L/min). If the system filter-flow rate
is higher than 475 L/min, install a manual bypass
valve. Figure 9 shows a valve installed between the
Figure 10. Thermometer and Pressure Relief Valve
heater inlet and outlet. To set the bypass valve, follow
this procedure.
1.
Clean the pool filter if necessary.
2.
With the filter pump off, remove the drain valve
located on the right side of the inlet/outlet header.
Install a 1/4 inch Pete's plug and thermometer
(see Fig. 10).
3.
Close the manual bypass valve.
4.
Turn off the heater by moving the rotary switch
to OFF.
5.
Start the filter pump.
6.
After 3 minutes, note and record the thermometer
reading (this is pool water temperature).
7.
Follow the procedures on the Lighting and
Shutdown label located inside the control com-
partment to turn the heater on.
8.
Let the heater run for at least five minutes before
noting and recording the new thermometer
reading. The difference between this reading and
the first one is the temperature rise.
Figure 11. Pressure Switch Adjustment