Aquacal LTM0266 - Manual (Page 28)

Page 22
“Y” and “Z”
connection
points “FS-2”
connection
points
4.4.b General Requirements

Locate the equipment disconnect within 6-feet of the heat pump ’s electrical enclosure, or as close to
the heat pump as possible. Always satisfy applicable codes and standards.

AquaCal AutoPilot heat pumps are designed for copper conductors only. Do not use aluminum wire.

Never mount a power-disconnect directly to the heat pump.

In sizing wiring, be especially aware of up-sizing requirements necessary due to wiring distances.
Always satisfy applicable codes and standards.

Multiple heat pumps installed at the same site will benefit from special automatic sequencing
controllers to avoid excessive power drops at start-
up. An “ASC” controller is available by calling
AquaCal AutoPilot Customer Support. See “Available Accessories” on page 35 for more
information.
4.4.c Grounding and Bonding
Follow local code requirements for properly grounding and bonding heat pump equipment.
4.4.d Sizing the Electrical Service
There are two (2) identical data plates on the heat pump; one located on
the outside right front corner and one behind the front access panel of
electrical enclosure.
Refer to equipment data plate (Figure 24) for specific information required
to size electrical service and over-current protection of heat pump. Sizing
is based on data plate information, wire size, wiring devices, and over-
current protection per applicable local codes and standards.
Figure 24
4.4.e Ground-Fault Protection
Local codes and regulations may require the use of a ground fault interruption device (GFI Circuit
Breaker). Nuisance tripping of these devices is common and not covered under the terms of the
M
anufacturer’s warranty.
4.4.f External Controls / Equipment
The heat pump allows external equipment to control the heat pump’s “ON” / “OFF” functionality. A direct
connection for external controllers has been provided on the microprocessor board.
1) Connect the external controller to the terminal
block of the microprocessor board using a
minimum 18-guage low voltage wire.
2) For a two-wire controller (which has a
thermostat) – Connect to the “Y” and “Z”
connections of the block labeled “X-Y-Z”. See
Figure 26.
3) For a three-wire controller (which does not
have a thermostat) – Connect to the block
labeled “FS-2”.
4) Program the heat pump to accept an external
controller’s signal. See section entitled
“Configuring for External Controller” on page
24 for more information.
Figure 25