Teledyne EHE warranty 2K. Water Piping, 2K-1.Reversal of Heater Water Connections

Hi-E2 Page 11

To connect a three-wire remote control harness (not supplied with the heater), order an E0120000 wire harness assembly which connects to the Flex-Temp control panel. Installation instructions are included with the wire harness assembly.

2K. Water Piping

2K-1. Reversal of Heater Water

Connections

The Hi-E2is shipped with water connections on the right side, but it can be modified in the field to provide left-side water connections. This is done by removing the water headers and re-installing them opposite to their original location. Some of the heater wiring and control components must be relocated, so this change must be done only by a trained service technician.

Water connection reversal is illustrated in Figures

18 and 19. Proceed as follows:

1.Remove the vent exhaust grille by removing the four screws which retain it. Retain these and all other parts for later reassembly.

2.Remove the top cover by removing the screws around the edges, under the overhang.

3.Remove the header covers. Note that the return header cover is retained by wing nut fasteners inside the heater.

4.Disconnect the pressure switch wires and remove the pressure switch tube from the inlet/outlet header by unscrewing the brass fitting.

5.Remove the temperature control sensor by removing the retainer bracket and its cap screws.

6.Disconnect the limit switch wires from the limit switches. The limit switches and the short wire between them may be left in place.

7.Remove both headers by unscrewing eight cap screws retaining each header.

8.Install the inlet/outlet header on the left side of the heater and the return header on the right. Position gaskets carefully to avoid water leaks.

9.Re-route the limit switch wires in front of the venturi tailpipe and attach them to the limit switches.

10.Re-route the temperature sensor wires in front of the venturi tailpipe and insert the sensor into the header. When the inlet/outlet header is on the left side, the sensor opening is at the rear. Re-install the retainer bracket and screw.

11.Re-install the pressure switch tube and fitting. Relocate fitting.

12.Adjust wiring and pressure switch tube routing so that they don't rest on sharp edges or on the hot surfaces of the combustion chamber. The combustion chamber is the portion of the assembly just above the heat headers.

13.Re-assemble all other components and fasteners.

2K-2. Pool/Spa Piping Systems Figure 20 illustrates typical piping for pool

equipment in pool/spa combination pools. With its Flex-Temp temperature control, the Hi-E2is particularly suitable for this type of pool installation.

The heater must be protected from back- siphoning of water, which can result in dry starts. If there is any chance of back-siphoning, provide a check valve between the pool and the filter pump inlet.

Arrangement of pool system components other than as illustrated in these diagrams can affect the operation of the heater’s water pressure switch. Location of the heater above or below the pool water surface can also affect operation of the switch. In general, the pressure switch can be adjusted to accommodate this effect if the heater water connections are no more than six feet below the pool water surface and no more than 15 feet above it. See instructions for pressure switch adjustment in the heater start-up section of this manual for more information about this. Note that when pool equipment is located below the pool surface a leak can result in large scale water loss or flooding. Teledyne Laars cannot be responsible for such water loss or flooding or the damage caused by it.

Do not install a shutoff valve or any kind of variable restriction in the water piping between the heater outlet and the pool/spa.

Pool systems with water flow rates higher than 125 GPM require an adjustable external bypass at the heater. See the section on start-up and adjustment for this information.

2K-3. Connections at Heater

The Hi-E2has a universal water header and flange design. With this feature, a variety of piping materials and sizes can be used at the heater. 1-1/2" PVC or 2" copper pipe can be connected directly to the heater using the rubber “donut” gaskets provided with the heater. 2" PVC or metal pipe can be threaded directly to the flanges and 1-1/2" schedule 40 metal pipe can be used with the rubber donut gaskets (see Figure 21).