C 2-Wire Controllers (Pool-Spa) - Aquacal Water Source WS03 Installation Manual

11. After establishing a connection from the external controller to the heat pump, further programming will be
required at the external controller.
See external controller manuals or contact installer or manufacturer of that product.
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1.4.c 2-wire Controllers (Pool-Spa)

PLEASE NOTE
2-Wire controllers are not designed to control chiller operation.
For full functionality, the Heat and Cool, and Cool Only heat pumps must use an external
SMART controller. Check with the external controller manufacturer for more
information.
NOTICE
Confirm equipment connected to heat pump before selecting this option . All existing configurations will be
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cleared.
1. Deactivate power to heat pump.
2. Remove heat pump electrical access panel.
3. Route 22-gauge (minimum), 2-conductor, low-voltage wires from
the controller to the low voltage side of the heat pump's electrical
enclosure. Follow all National Electric Codes (NEC) unless State or
Local guidelines supersede.
4. Connect the controller wires to the control board port labeled "Ext
Controller" with the terminals labeled "Y" and "Z" as follows. See
Figure 5.
Connect one wire to "Y".
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Connect other wire to "Z".
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The polarity of the wire is not important.
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5. Reattach heat pump access panel.
6. Apply power to heat pump.
7. Configure the heat pump to accept a 2-wire external controllers signal as shown. See "Configure 2-wire
controller" below.
Configure 2-wire controller
IF UNIT IS ASLEEP,
SWIPE TO WAKE UP
PRESS "ENTER"
C
Failure to heed the following may result in damage to equipment.
PRESS MENU
A
BUTTON
USE ARROWS TO
D
"ADVANCED"
Figure 5
USE ARROWS TO
B
"SYSTEM"
PRESS "ENTER"
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