Model No, Connection, Minimum, Gpm Rates gpm

1-1/2" Slip Ball Valve

2-1/2" Outlet

Inlet/Outlet Header

Raypak recommends the installation of an air bleed vent at a suitable location (usually the highest point in Pump the plumbing) to remove air from the piping system. These units should be available at your local whole-

sale supplier. Raypak does not provide this item.

2-1/2" Inlet

Fig. 11: Companion Flange Connections

(Models 1287/1336–1758/1826)

3" Outlet	3" Inlet
2" Slip	2 H.P. Pump
Ball Valve

Inlet/Outlet

Header

Fig. 12: Companion Flange Connections

(Models 2100–4001)

Model No.	Connection	Minimum	Maximum
	Connection	Minimum	Maximum
	Size	gpm	gpm
926–1223	2” FPT	60	120
1287–1826	2-1/2” FPT
1287–1826	2-1/2” FPT	Refer to Table D
2100–4001	3” FPT	Refer to Table D
2100–4001	3” FPT
	Table C: Water	Connections

Model No. Loop* Flow Rates Heater Flow

(gpm) Rates (gpm)

1287/1336 30–5085

1414/1468 35–5585

1571/1631 40–6585

1758/1826 45–7085

2100 50–80180

2500 60–95180

3001 75–115180

3500 90–135180

4001 100–150180

*Loop is secondary piping to heater from main system.

CAUTION: Power to the heater should be interlocked with the main system pump to make sure the heater does not fire without the main system pump in operation. Improper flow control can damage the heater. Uncontrolled flow (too high) or restricted flow (too low) can seriously affect heater operation. Follow these instructions to make sure your heater is properly installed.

Models 1287 through 4001 are equipped with an external pump and bypass arrangement that blends outlet water with the inlet to increase the inlet water temperature, thereby reducing the likelihood of con- densation forming on the heat exchanger. The pump also serves to circulate water through the heater from the main system piping.

To complete the installation of the pool heater, the pool thermostat needs to be installed in the main return water line. This will ensure that the heater will be ener- gized at the right time. If the main water line is too far away from the heater and the capillary bulb will not reach it, locate the pool thermostat adjacent to the main line and run wires back to the heater. Follow the instructions listed below to install the poolstat.

Mounting the Poolstat Control with Front-Mounted Loop Using Mounting Slots

For heater models:

1287, 1336, 1414, 1468, 1571, 1631, 1758, 1826, 2100, 2500, 3001, 3500, 4001.

NOTE: For more detail on piping, refer to the diagrams on pages 15, 16 & 17.

1.Remove the poolstat control cover by removing the two cover screws at the top. See Fig. 13 & 14.

Table D: Flow Rates