AUXILIARY PUMP

The solar collectors must be the highest point of the system. The maximum height of the solar installation from the base of the solar storage tank to the top of the solar collectors is 9 m. The pump supplied with the solar storage tank will not circulate closed circuit fluid through heights greater than 9 m and solar gain will not be achieved.

For heights greater than 9 m, an auxiliary pump (kit PN 299914) must be installed above and within 1 m of the solar storage tank. The installation of an auxiliary pump will enable a maximum height of 18 m to be achieved. The auxiliary pump is the same model pump as supplied with the solar storage tank.

Note: The installation of an auxiliary pump does not allow for an increase in total pipe length of the system.

The maximum pipe lengths must be observed (refer to “Pipe Lengths” on page 26).

Part No

Kit Contents and Description

Kit 2 nd Pump Assembly Drain Back

299914

121994 installation instructions auxiliary pump 1

299998

108381

108380

080031

088063 pump Salmson HXL63-15P RU15/21 Union bracket pump wall mount cover pump wall mount screw phillips pan head no 8 x 13 union fitting assembly ½” x ½” male

(includes union ½” x ½” male, copper olive, compression nut)

1

1

1

4

2

080138 cable tie black 200 mm long cable tie mount adhesive backed 4 way

AUXILIARY PUMP – PLUMBING CONNECTIONS

The auxiliary pump is to be installed:

10

4 on the solar cold pipe from the solar storage tank to the solar collectors.

Refer to the label on top of the storage tank to identify the solar cold pipe. The solar cold pipe connection is located toward the outer edge of the top of the solar storage tank. within 1 m of the top of the solar storage tank. with the inlet and outlet in a vertical orientation.

Note: The arrows on the rear face of the pump indicate the direction of flow and should be pointing upwards when the pump is in the installed position. with the mounting bracket securely fixed to a structure, such as a wall, with suitable screws or anchors.

wired to the control board and earth connector strip (refer to “Auxiliary Pump – Electrical Connection” on page 37).

with the speed setting set on 3.

This speed setting must not be adjusted. The solar control unit automatically controls and adjusts the speed of the pump to maximise solar contribution. Manual adjustment of the speed dial setting may result in the system not operating correctly or efficiently. enclosed within the mounting cover provided in the kit to protect it from rain as the pump is not weatherproof.

The mounting cover is to be secured to the mounting bracket with the screws provided. with the insulation on the solar cold pipe fitted up to the connections of the auxiliary pump, as very high temperature closed circuit fluid can flow from the solar collectors to the solar storage tank under certain conditions.

Refer to the installation diagram on page 36.

35

AUXILIARY PUMP

Auxiliary Pump Installation

Auxiliary Pump Typical Installation

Solar Drain Back

36

AUXILIARY PUMP

AUXILIARY PUMP – ELECTRICAL CONNECTION

The auxiliary pump, if installed, must be wired to the control board. The flexible cord supplied with the pump must be housed in a 20 mm flexible conduit. The flexible conduit should be secured to the insulated pipe work with the cable ties provided, to the side of the solar storage tank using the adhesive backed cable tie mounts and cable ties provided and to the penetration in the solar storage tank jacket using the cable gland provided.

It is necessary to make a penetration in the jacket of the solar storage tank, 30 mm to the right of and aligned with the mid height point of the lower front cover, to accommodate the flexible cable and conduit. The penetration, 20 mm in diameter, can be made using a hole saw, suitable for cutting through 0.5 mm thick

Colorbond. The edge of the penetration is to be smoothed off after forming to ensure there are no sharp edges. Refer to the diagram for position.

Auxiliary Pump Wiring Connection Jacket Penetration

Penetration Position - Auxiliary Pump Conduit and Cable

Drain Back Solar Storage Tank

the ribbon cable from the solar control module.

Connect the active plug from the auxiliary pump to the terminals marked “PUMP 2” on the control board

(refer to “Wiring Diagram” on page 34) and the earth wire spade connector from the auxiliary pump to a

terminal on the earth connector strip located on the bracket adjacent to the control board.

The solar monitor located on the lower front cover is connected to the solar control module by a ribbon cable.

The ribbon cable has sufficient length to enable the removal of the lower front cover and for it to be set to one side of the opening without disconnecting the ribbon cable from the solar control module. The ribbon cable can be disconnected from the solar control module if it is necessary to remove the lower front cover completely from the work area in front of the solar storage tank.

If the ribbon cable from the solar monitor has been disconnected, reconnect it to the solar control module prior to replacing the lower front cover.

37