Aquacal 100 Programming manual

1
Attention Installer: This manual is purchaser’s property; leave with heat pump owner!
PN: LTP0030
3/17/08
Pool & Spa Heat Pump
Owner’s Manual and Installation Guide
- and -
Models:
100, 110, 120, 135 & 155
101,111,121,156
HEAT ONLY
and
HEAT - COOL
Additional Labels:
South Beach
Caribbean
Fox Smart
Tropez
MODEL / SERIAL NUMBER
Multi-Language
(English-Spanish-French)

NOTES
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TABLE OF CONTENTS
WELCOME TO THE TEAM ----------------------------------------------5
IMPORTANT FEATURES OF YOUR NEW HEAT PUMP ------------------6
HOW A HEAT PUMP WORKS ------------------------------------------7
SAFETY INFORMATION------------------------------------------------8
QUICK START & STOP -------------------------------------------------10
HEATER CONTROLS ---------------------------------------------------12
Control Panel Layout -----------------------------------------------12
Buttons, Lights, and Display --------------------------------------12
Operational & Programming Codes --------------------------------13
Owner-Level Programming (complete) ---------------------------14
MAINTENANCE AND GENERAL OPERATION --------------------------18
General Maintenance-----------------------------------------------18
Safety During Cleaning Operations -------------------------------18
Maintaining Proper Water Flow ------------------------------------19
Controlling Water Chemistry --------------------------------------19
Controlling Irrigation and Storm Water Run Off ------------------20
Maintaining Clearances Around Heater ---------------------------20
(Continued on Next Page)
1-800-786-7751

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TABLE OF CONTENTS
(CONTINUED)
MAINTENANCE AND GENERAL OPERATION...CONTINUED:
Heating Tips--------------------------------------------------------21
-Heating in Cooler Weather --------------------------------------21
Pool/Spa Blankets-----------------------------------------------21
Pool & Spa Combination Heating -------------------------------21
Spa Set-Back Option -------------------------------------------21
Calculating Initial Heating Time-----------------------------------22
Seasonal Use & Shut Down ----------------------------------------23
-(Use) During the Swim Season --------------------------------23
-Freeze Protection and Winterizing Requirements --------------23
-Winterizing Procedure ------------------------------------------24
AquaCal Preventive Maintenance Program ------------------------25
TROUBLESHOOTING (No Op, No heat, Water from Unit) ------------26
Troubleshooting Flowcharts ----------------------------------------27
INSTALLER-SPECIFIC INFORMATION (Installation & Set Up) ------30
Installer-Specific Table of Contents -------------------------------31
CONTACTING THE FACTORY ------------------------------------------57

5
Dear Owner:
C
ongratulations on your wise decision to make an AquaCal heat pump part of
your home. Since 1981, AquaCal has maintained the worldwide lead in the
manufacture of swimming pool & spa heat pumps. Your new heat pump is not
only a great investment, but also the most
cost effective method available for heat-
ing pools and spas. For example, your
heat pump is up to 400% more efficient
than gas, and, when compared to elec-
tric resistance heat, your heat pump is
nearly 600% more effective. You can rest
assured your new heat pump is of the
highest quality and efficiency, and is de-
signed and built to provide years of
trouble-free operation.
Moreover, should you ever require help in
using or maintaining your heat pump, you
will find AquaCal’s customer and technical
support staff to be the largest, most qualified, and—of utmost importance—the
most easily accessed customer service team in the pool & spa heat pump industry.
“You can rest assured
knowing your new heat
pump is of the highest
quality and efficiency,
and is designed and
built to provide years
of trouble-free
operation.”
Welcome
eam
T
to the

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Corrosion-Proof Cabinet
The cabinet, being made from resilient, UV-Protected ABS material, has superior fade
resistance and can never rust or corrode. You can expect the cabinet to retain a like-
new appearance with only an occasional wash down and—if so desired—a quick waxing.
PLEASE READ FURTHER TO BECOME FAMILIAR WITH ALL THE FEATURES, THE SAFE
OPERATION, AND THE CARE OF YOUR NEW HEAT PUMP.
Important Features of Your
New Heat Pump
Heat & Cool Capability*
Puts you in full control, year round... Warms your pool or spa with the reliability and
efficiency of our other heat pumps, but, with the flip of a switch, can also cool your pool
or spa to refreshing temperatures during hot summer months. For cooler climates,
Heat & Cool heat pumps offer unique advantages over passive defrost models. Please
read more below...
Hot Gas Defrost*
Hot gas defrost heat pumps are uniquely equipped for an active defrost cycle. Active
defrost involves directing hot refrigerant vapor to the heat collector, melting accumulat-
ed ice away in a matter of a few minutes... then right back to heating. Standard defrost
heat pumps may remain “off in defrost” for extended periods during very cold weather.
Because of their ability to continue to operate–even during freezing weather–hot gas
defrost models extend the swimming season longer than any standard-defrost heat
pump.
Scroll Compressor
50% fewer moving parts than standard piston-type compressors. This equates to much
improved reliability and improved efficiency. Scroll compressors are also much quieter in
operation than their piston-type counterparts. And, while all AquuaCal heat pumps are
known for their low operating noise levels, if yours is a SuperQuietTM model, it’s very
likely your heat pump will be quieter than any other item on the pool equipment pad.
*These features available in Icebreaker®and SuperQuietTM Models Only.
ThermoLink®Heat Exchanger
The heart of your heat pump is the patented ThermoLink®heat exchanger. One of the
primary causes of premature heat pump demise is the failure of the heat exchanger.
Ordinary heat exchangers are made from a cupronickel alloy. This cupronickel material is
susceptible to attack from the sanitizers used in pools and spas and from other related
water chemistry conditions. Once the heat exchanger fails, the heat pump is ruined. The
ThermoLink®heat exchanger tube is made from titanium, and is virtually impervious to
water chemistry damage.
Digital Controller
Digitally-based microprocessor controls water temperature to within 1º Fahrenheit of
set point. Controller also permits user to predefine different pool and spa water temper-
atures, and to prevent tampering by locking out controls via a pass code.

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HOW AHEAT PUMP WORKS
THE FOLLOWING EXPLANATION IS PROVIDED TO HELP YOU IN UNDERSTANDING
WHAT TO EXPECT FROM YOUR HEAT PUMP…
A Heat Pump Does Not Make Heat…
Heat pumps are so extraordinarily efficient because they do not need to produce heat in
order to warm pool or spa water. Rather, heat pumps simply transfer heat from the
outside air into the water.
If one considers Absolute Zero (the point where all heat is absent) occurs at -459º
Fahrenheit, it becomes evident outside air, even at the relative cool temperature of 55º
Fahrenheit, still contains large amounts of heat energy. It is that abundant heat energy a
heat pump captures and places into your pool or spa.
H
EAT
L
ADEN
A
IR
E
NTERS
C
OOL
W
ATER
I
N
HEAT REMOVED FROM AIR...
COOL AIR OUT
WARMED WATER
OUT

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Used and maintained properly, your heat pump will provide year-upon-year of safe and
economical service. However, as with any mechanical or electrical device, to get the
most from your heat pump–while insuring personal safety for you and others–certain
operational and maintenance factors must be observed.
Likewise, excepting a few minor owner-capable maintenance items (explained later in
this manual), repair and service of your heat pump must be performed only by experi-
enced service personnel. Should you, the owner, suspect your heat pump is not per-
forming properly, by referring to the section in this manual entitled: "Troubleshooting,"
you will be able to determine if a call for service is required. Your installer can be one
source of service, or AquaCal Customer Support personnel stand ready to assist you
at: [phone]. For questions concerning installation, modifications, operation,
service and upkeep, please contact your installer or AquaCal Customer Support. War-
ranties may be voided if the heater has been used, maintained, or repaired improperly.
In addition to voiding the manufacturer’s warranty... unapproved installation methods,
nonstandard modifications, poor or incorrect maintenance, service by unqualified per-
sonnel, or improper use of the heater may result in personal injury and/or property
damage. For personal safety, and to avoid damage to equipment, follow all safety
instructions displayed on the heat pump and within this manual.
SAFETY INFORMATION
“Warning” signal appears in this manual where special attention is required for personal
safety. (Specific instructions will appear in this box.)
Failure to heed the following may result in perma-
nent injury or death.
WARNING !
“Caution” signal appears in this manual where special care is required to avoid
equipment damage. (Specific instructions will appear in this box.)
Failure to heed the following may result in equipment
damage.
CAUTION !
Throughout this manual the following two safety signals are placed where particular care
is required. Please note "WARNING" relates to personal safety, while "CAUTION" signals
promote avoiding damage to equipment.
Safety Signals

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Refrigerant Circuit Service Only by
Qualified, EPA Certified Technician
Notice: Heater NOT Repairable by Owner
Water Chemistry Safety
Water Temperature Safety
WARNING ! Failure to heed the following may result in permanent
injury or death.
Heat pumps contain no owner-repairable components. Repairs must not be attempted
by untrained and/or unqualified individuals. If service is deemed necessary, contact
installing dealer or AquaCal Customer Support at [phone].
WARNING ! Failure to heed the following may result in permanent
injury or death.
Prolonged immersion in water warmer than normal body temperature may cause a condi-
tion known as HYPERTHERMIA. The symptoms of hyperthermia include: unawareness of
impending hazard, failure to perceive heat, failure to recognize the need to exit the spa,
and unconsciousness. The use of alcohol, drugs, or medication can greatly increase the
risk of fatal hyperthermia. In addition, persons having an adverse medical history, or preg-
nant women, should consult a physician before using a hot tub or spa. Children and the
extreme elderly should be supervised by a responsible adult.
While your heat pump’s titanium-based heat exchanger provides nearly impervious
protection against poor water chemistry, improper water chemistry may cause expensive
damage to pump, filter, pool shell, etc. To avoid equipment damage, maintain Pool/Spa
water per standards detailed later in this manual.
Failure to heed the following can result in damage to
equipment.
CAUTION !
Improper water chemistry can present a serious health hazard. To avoid possible hazards,
maintain Pool/Spa water per standards detailed later in this manual.
Failure to heed the following may result in permanent
injury or death.
WARNING !
WARNING ! Failure to heed the following may result in permanent
injury or death.
Heater contains refrigerant under pressure. Repairs to the refrigerant circuit must not be
attempted by untrained and/or unqualified individuals. Service must be performed only by
qualified HVAC technicians. Recover refrigerant before opening system.

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HEATING- QUICK START & STOP
Getting Started
(Quick-Start & Stop Continued Next Page)
1. Verify Electrical Power is Present at Heater:
A. Ensure that the unit has electrical power connected; the heater controller display should be
illuminated.
B. If the display is blank, be certain the electrical breaker, and heater disconnect, are switched to
“ON.”
C. For now, leave the water circulation pump OFF.
A. The user/owner settings can be made without water flowing. Once the heater has electrical
power connected, with water not flowing, the display should read FLO.
B. Press the MODE button until the HEAT (HEA) indication displays. This action will enable the
remaining programming keys.
C. Using the POOL / SPA selector key, select the POOL mode. An illuminated POOL indicator
light, located on the left side of the display, will confirm the POOL control has been selected.
If heating only a spa, using the DOWN arrow key, lower the POOL temperature until OFF is
displayed; then proceed to Step-“E.”
D. Use the UP / DOWN arrow keys to set the desired water temperature for the POOL water.
E. If the heat pump will be used to heat a spa, use the POOL/SPA selector key to select SPA,
then use the UP / DOWN arrow keys to set the desired water temperature for the SPA. An
illuminated SPA indicator light, located on the left side of the display, will confirm the SPA
control has been selected. If heating only a POOL, using the DOWN arrow key, lower the
SPA temperature until OFF is displayed.
F. The heat pump controls are now set to maintain the desired water temperature for the POOL
and/or SPA.
2. Set the Heater Controls (Refer to Control Panel Layout, Pg-12):
OWNER- If heater is connected to a Call-Flex controller, also see “Selecting Call-Flex Pump
Options,” located on page-17 of this manual.
INSTALLER- Is heater connected to an external controller? If so, see external controller
information located on pages 41 and 44 of this manual.
This brief information is provided as an aide to installers, service personnel, and owners. The intent of
this section is to provide rapid access to very basic operational information. Individuals who will be
routinely using, installing, maintaining, and servicing this heat pump, are strongly encouraged to read
this entire manual. Herein, the terms: Heat Pump, Heater, and Unit are used synonymously. These
instructions are intended for local control of a heat pump, independent of an external con-
troller. Owners: if your installation includes an external controller, contact your installing dealer,
or the external controller manufacturer, for external controller operating instructions.
These instructions are for quick-starting in the HEATING mode... Owners of Heat-Cool units, in
order to utilize all features of their heater, will certainly want to also refer to: Owner Level Program-
ming, beginning on page-14 of this manual.

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NOTE: THE HEATER CONTROLLER INCORPORATES AN ANTI-SHORT CYCLE TIME DELAY. SHOULD OPERATION BE
INTERRUPTED,COMPRESSOR RESTART WILL BE DELAYED BY APPROXIMATELY 4-MINUTES.
HEATING-QUICK START & STOP (continued):
(End...Quick-Start & Stop)
6. To Stop the Heat Pump:
A. Select: OFF via the MODE selector. This method of shut down preserves the controller
settings;
B. An interruption of water flow–such as when a pump timer is in control–will also halt heat
pump operation.
5. Continuous Usage and Water Around Heater:
Condensation... After the heat pump has been operating for some time, water may be observed
surrounding the heater. The moisture seen is condensation produced as a normal by-product of
transferring heat from the air into the pool or spa water. Quantities of 6-8 gallons of water produced
per hour are common if the air humidity is high. Conversely, a low humidity condition may result in
no condensation being produced. (If water around unit seems excessive, to troubleshoot, see
page-26, “Water Coming from the Heat Pump.”)
4. Program Filter Pump Run Time:
Most pool/spa systems utilize a timer or multifunction controller to manage filter pump run times.
If your system incorporates such a device, follow the instructions below:
A. It will be necessary to allow the filter pump to run continuously until the water has reached the
desired temperature. If a timer controls the pool filter pump, it will be necessary to override
the timer to allow 24-hr. operation.
B. Once the desired temperature has been obtained (1-4 days), reset the pump control device.
Colder months require longer running times–generally eight to twelve hours/day.
C. A heat pump can only operate when the filter pump is running. Therefore, it may be
necessary–during cooler weather–to extend the water pump’s hours of daily operation.
The increased run time is necessary in order to keep up with increased, weather-related
heat losses.
3. To Begin Heating:
A. Verify MODE is set to: HEAT (HEA); then, depending on which body of water is to be heated,
use the POOL / SPA selector key to select POOL or SPA.
B. Position water valves to flow water from the pool or spa, through the heater, and back to the
pool or spa.
C. Start the water pump; the fan will start, and after 4-minute time delay the unit will begin
heating. The selected body of water will be brought to temperature and maintained per the
setting determined previously in: “Set the Heater Controls.”
D. In operation, whenever the actual (displayed) water temperature falls below the desired set
point, after an initial time delay of 4-minutes, the unit will begin heating.

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HEATER CONTROLS
Control Panel Layout
(APPEARANCE VARIES BY MODEL)
Control Buttons, Indicator Lights, & Display
(AS INDICATED BY CIRCLED NUMBERS)
1) POOL / SPA SELECTOR – Selects either pool or spa thermostat.
2) COOLING INDICATOR LIGHT – Indicates unit is cooling. (Note: this light
nonfunctional with heat-only models.)
3) UP ARROW – Increases temperature setting. (Maximum setting is 104 oF)
4) DOWN ARROW – Decreases temperature setting. (Minimum setting is 45 oF)
5) HEATING INDICATOR LIGHT – Indicates unit is heating.
6) MODE SELECTOR – Used to select between the Heating, Cooling, Auto-
Changeover, and Off for Heat & Cool models. Used to select between Heating
and Off for heat-only models.
7) SPA INDICATOR LIGHT – Indicates heater is referencing spa thermostat.
8) POOL INDICATOR LIGHT – Indicates heater is referencing pool thermostat.
9) LED DISPLAY – Displays water temperature when no keys are being pressed.
Displays desired temperature when UP ARROW or DOWN ARROW is pressed.
Also displays operational, programming, and fault codes as applicable.
10) DESIRED TEMPERATURE LIGHT – Indicates temperature set point is being
displayed. Indicates temperature set point is being changed due to the UP
ARROW or DOWN ARROW being pressed.
11) WATER TEMPERATURE LIGHT – Indicates current water temperature is being
displayed.

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THE FOLLOWING CODES WILL BE DISPLAYED AS PART
OF THE NORMAL OPERATION OF THE HEATER:
Operational & Programming Codes
FLO..... No Water Flow Detected. This code appears whenever the circulating pump is off, or when
the heater is not receiving correct water flow.
OFF..... System is Off. This code appears whenever heater has been turned off via the mode
selector button, or when the temperature set point has been lowered below 45
o
F.
CFI...... Celsius/Fahrenheit Selection. This is a programming entry point to select in which format
the water temperature will be displayed.
ULC..... User Lock Code. This is a programming entry point; when activated, steps to the next
menu level: ELC.
ELC..... Enter Lock Code. This a programming entry point; permits end user to select a secret
code, thereby limiting access to the owner settings.
CFO..... Call Flex Options. This is a programming entry point; when used in conjunction with an
AquaCal Call/Flex add on kit, permits the use of CALL or FLEX options.
FS....... Heater in Defrost Mode (Applicable to Heat-Only Units, only). This code appears as a
normal display during periods of lower air temperatures. Sequence follows:
Heat-Only Defrost Sequence: Fan continues to run and compressor is off. Compressor
will restart when air coil temperature rises to approximately 38°F.
LOC..... This is a Service Entry Point (not intended for use by the owner). The[LOC] code permits
service personal to enter a factory code for access to adjustable calibration and site-
dependant setup parameters. Service adjustments are available to authorized installation
and service personnel, only.
HEATER CONTROLS...continued
Failure to heed the following may result in equipment dam-
age and voiding of manufacturer’s warranty.
CAUTION !
Heat pumps contain no owner-serviceable components. Owner-initiated adjustments, beyond
the controller “LOC” code, must not be attempted. If adjustments are deemed necessary, the
owner should contact installing dealer or AquaCal Customer Support at [phone].

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HEATER CONTROLS...continued
Start Up & Setting Operating Controls
Owner-Level Programming Instructions (Complete)
Covered within this section are features and settings typically accessed first by the installer, and then
remaining accessible by the end user (the owner). These features reside at the Level-1 access point
within the microprocessor. Note: if preferred, all programming may be performed without water flow,
waiting to start the water pump as the last step in the set up and run process.
1. Applying Power to The Controller:
A. When power is first applied, the controller performs a lamp test and the display will read
[888]. Following [888] the software version will display briefly.
B. The control will then display the actual water temperature, provided the circulating pump is
operating, and adequate water is flowing through the heater.
C. If the pool-circulating pump is off, the control will display: [FLO]. This code message
indicates no (or insufficient) water is being circulated through the heat pump.
2. MODE Controls Explained, and Starting the Heat Pump:
A. Once electrical power is supplied to the heat pump, sufficient water is circulating, and the
heater controller has successfully completed its self-test, the heater is ready to operate.
B. The heat pump is shipped with the controller [MODE] function set to “OFF”. There are two
ways to switch the heat pump OFF: First Method- One of the functions of the [MODE]
button is “OFF”. Second Method- The thermostat set point can be lowered to a position
below the minimum temperature setting (45oF); this action will cause the display to read
“OFF”. To switch the unit ON, first use the mode button to select the HEAT mode—for Heat
Only models—or, if the heat pump is a Heat and Cool model, use the mode button to select
one of the following modes: HEAT, COOL, or ACH (Auto-Changer Over). In the [OFF] mode,
the actual water temperature will be displayed as long as the circulating pump is operational
and correct water flow is present. In the event water is not circulating through the heat pump
(or flow is insufficient), the controller will display the [FLO] (No Water Flow) code message.
C. Using the UP ARROW key, increase the desired temperature until it exceeds the value of the
actual temperature displayed. (Note: See # “8,” later in this section, if “000” is displayed upon
pressing either the up or down arrow keys.) Once the desired temperature has been
entered, the display will read the actual temperature and the heat pump will start to operate.
Both the compressor and the fan must be operating before the “Heating” LED will illuminate.
(Note: When MODE function is OFF, the current water temperature will be displayed; no
functions, values, or programming will be available for adjustment.)
3. Turning The Heat Pump Off:
A. Method 1: using the [MODE] key, press the key until the display reads “OFF” The
heater will shut off and remain off until the [MODE] key is used the select an operational
mode. This is the preferred method for shutting off the heat pump.
B. Method 2: using the DOWN key, press the key until the desired water temperature reaches
45oF (minimum setting); then, press the DOWN key one more time, causing the display to
read “OFF”. This method is typically used in conjunction with 2-wire external controllers;
these controllers are equipped with their own thermostats.
(Continued on Next Page)

15
4. Selecting Pool/Spa Thermostat Settings:
A. Press the [POOL/SPA] key to toggle between the pool and the spa temperature set points.
B. The pool/spa LED indicator lights, located to the left of the temperature display, will confirm
the selected set point.
5. Changing The Pool Temperature Set Point:
A. Using the [POOL/SPA] key, select the POOL temperature set point. The pool set point
indicator light will confirm the selection.
B. The pool temperature set point is adjustable from a minimum of 45oF to a maximum of
104oF. Pressing the [UP ARROW] key will raise the set point 1-degree for every push of the
button. Pressing the [DOWN ARROW] key will lower the set point 1-degree for every push
of the button.
HEATER CONTROLS...continued
Start Up & Setting Operating Controls
6. Changing The Spa Temperature Set Point:
A. Using the [POOL/SPA] key, select the SPA temperature set point. The spa set point indicator
light will confirm the selection.
B. The spa temperature set point is adjustable from a minimum of 45oF to a maximum of
104oF. Pressing the [UP ARROW] key will raise the set point 1-degree for every push of the
button. Pressing the [DOWN ARROW] key will lower the set point 1-degree for every push
of the button.
7. Selecting Between oF and oC:
A. Simultaneously press and hold both the [UP ARROW] and [DOWN ARROW] keys until
[CF1] (Celsius / Fahrenheit) code appears.
B. With the [CF1] code displayed, pressing the [UP ARROW] or [DOWN ARROW] keys will
change the selection code to either “0” or “1”. Select “1” for Fahrenheit temperature display,
or “0” for Celsius temperature display. Once the desired temperature display mode has
been selected, not pressing any buttons for 15-seconds will allow the controller to save the
selection and return to the normal operating mode. Pressing the {POOL/SPA] key will also
save the selection and step to the next menu parameter: [ULC] (User Lock Code).
8. User Lock Code Option [ULC]:
This Option Explained:
Heat pumps are shipped from the factory with the [ULC] option disabled. Enabling the [ULC]
function permits the heat pump owner to restrict access to the unit’s controls. With the [ULC]
function enabled, unless the correct ULC code number is entered, changes to Level-1
programming are not possible. (I.e.: Altering temperature set points, Pool/Spa selection, C/F
display changes, etc., will not be possible). The [ULC] option can be thought of as an electronic
lockable cover for the controls.
(Continued on Next Page)
Owner-Level Programming Instructions... continued:

16
HEATER CONTROLS...continued
Start Up & Setting Operating Controls
(ULC Continued on Next Page)
8. User Lock Code Option [ULC]...continued:
A. Selecting ULC Option:
1) Press either the UP or DOWN ARROW keys; if “LOC” is momentarily displayed followed
by “0”, the ULC feature is enabled. If “0” displays proceed to “6)” of this section;
otherwise, see number “2,” below.
2) Simultaneously press and hold both the [UP ARROW] and [DOWN ARROW] keys until
[CF1] (Celsius / Fahrenheit) code appears.
3) Press the [POOL/SPA] key once to display [ULC].
4) With [ULC] displayed, pressing either the Up or Down Arrow key will display either “1” or
“0”. Selecting “0” will allow the keypad to remain unlocked. Selecting “1” will enable the
User Lock Code option. Then, to enter a lock code number, press the [POOL/SPA] key
once to display [ELC] (Enter Lock Code).
5) With [ELC] displayed, use the Up or Down arrow keys to select a lock code. The code
can be any number from “00” to “99”. The factory set lock code is “0”. Not pressing any
buttons for 15-seconds will allow the controller to save the selection and return to the
normal operating mode. Pressing the {POOL/SPA] key will also save the selection, and
will step the controller to the next menu parameter: [CFO] (Call Flex Options).
6) Once the ULC option has been enabled, pressing any key will momentarily display
“LOC” followed by “0” (prompting the entry of the correct lock code number). To gain
access to the controller:
a. Using the [UP ARROW] key, scroll to the correct lock code number, then;
b. Press the [POOL/SPA] key… Current water temperature will be displayed… Control
setting can now be viewed or changed as desired.
c. After a period of approximately four (4) minutes, during which time no buttons have
been pressed, the controller will automatically return to the locked mode. Provided
ULC selection is set to “1,” the controller will always fail-safe in the locked mode.
d. Without knowledge of the correct lock code, and with the ULC enabled, control
adjustments will not be possible. Be certain to record your lock code in a safe
place. The lock code may be changed any number of times by following the
instructions detailed in this section.
Owner-Level Programming Instructions... continued:
B. De-Activating the User Lock Code [ULC] function:
1) Following the instructions detailed previously at: “8, 6)”, press any key and enter the
user lock code number; then press the [POOL/SPA] key.
2) Immediately following the entry of the user lock code, simultaneously press and hold the
[UP ARROW] and [DOWN ARROW] keys until the code [CF1] appears on the display.
3) Then, use the [POOL/SPA] key to scroll to the [ULC] message; press the [DOWN
ARROW] key to change the display to “0”. This will disable the User lock function.

17
HEATER CONTROLS...continued
Start Up & Setting Operating Controls
9. Selecting Call-Flex Pump Options [CFO]:
General Information:
The Call-Flex option automatically adjusts the run time of the water circulator pump, and heater,
based upon changing weather conditions. Without Call-Flex, as weather conditions grow
progressively cooler during winter months, or when unusually cold weather occurs, the run
duration of the circulator pump may require manual adjustments to permit the heater to maintain
or reattain desired water temperature (the water pump must be running in order for the heater to
operate). Likewise, without Call-Flex, one must remember to reset the pump run controls
following the cold weather event. The Call-Flex option greatly reduces the need for seasonal,
manually-made, pump run time adjustments. Call-Flex is a dealer-installed option that does
not come with every heater; if unsure, check with the installing dealer to determine if a call-flex
kit was part of the original installation. If Call-Flex was not part of the installation, and you would like
to have Call-Flex added, your dealer can do so...contact the installing dealer.
If the installation is equipped with the Call-Flex option, the following steps are used to control the
Call-Flex features:
A. Simultaneously press and hold the [UP ARROW] and [DOWN ARROW] keys until the
display shows “CF1”. Press the [POOL/SPA] key three times to scroll the display to [CFO].
B. With the [CFO] (Call-Flex Options) code displayed, use the Up or Down keys to select “0” to
disable the Call Flex Options, “1” to enable the Call Option, or “2” to enable the Flex Option.
Not pressing any buttons for 15-seconds will allow the controller to save the selection and
return to the normal operating mode. Pressing the {POOL/SPA] key will also save the
selection, and will step the controller to the next menu parameter: [LOC] (Service Lock
Code).
C. For further information, please refer to Call-Flex installation instructions, shipped with the
Call-Flex kit. For additional copies of these instructions, contact the AquaCal Customer
Support (800-786-7751).
C. User Lock Code is Activated, but Pass Number is Not Known (“Back Door Entry”):
Note: Should the ULC option be enabled, and a lock code number other than the factory
default (0) be installed but is unknown, the following procedure may be followed to regain
controller programming access:
1) Simultaneously press and hold the [POOL/SPA] and [UP ARROW] keys until the display
shows “888”. This operation will reset the controller to the factory default settings.
2) When reset to the factory default settings the user lock code [ULC] is deactivated and
the user lock code number [ELC] is reset to “0.”
3) In addition, all other settings are returned to the factory defaults. If an external
controller is in use, contact AquaCal Technical Support Group (800-786-7751); ask for
assistance with re-configuring the controller for use with an external controller.
(End... Owner-Level Programming Instructions)
Owner-Level Programming Instructions... continued:

18
MAINTENANCE
OPERATIONAL RECOMMENDATIONS
&
The information in this section is written primarily for the Home Owner, but may also apply to servicing
dealers or HVAC service centers. This section contains information concerning planned maintenance,
proper water flow, maintaining proper clearances, as well as other vital information. Please read this
section now, and before calling AquaCal Customer Support (800-786-7751).
Heat pumps should be inspected and maintained on an annual basis by a qualified swimming pool
heat pump specialist. Additionally, if the heat pump is located near the beach or coastal area, where
salt spray and sand can become detrimental factors, more frequent service may be necessary. For
service plan information, please see: Planned Maintenance Program, later in this section, and then
contact AquaCal Customer Support at: 800-786-7751.
While annual maintenance is recommended to maintain your warranty, if you choose not to participate
in the Planned Maintenance Program, rinsing the air coil regularly, and keeping the base of the unit
clear of leaves and debris is a necessity.
Should you as the owner desire to perform the coil rinsing and other cosmetic care of the heat pump,
please contact AquaCal Customer Support: 1-800-786-7751; request the document titled: “Appearance
Care for Air-Source Heat Pumps: Approved Method for Home Owners.”
General Maintenance
Safety During Cleaning Operations
Do not use a pressure cleaner to wash heat pump . . . . Damage to evaporator fins, as
well as other components, will result.
Failure to heed the following may result in damage to
equipment.
CAUTION !
POSSIBLE ELECTRIC SHOCK HAZARD . . . Should you decide to wash the heat pump
via water hose, disconnect all power to the pool equipment pad- including, but not limited
to: The heat pump, water pump, and any and all other electrical equipment. Do NOT spray
water directly into electrical components. Do NOT restore electrical power until such time
as all water has dried completely.
Failure to heed the following may result in permanent
injury or death.
WARNING !

19
•It is important to operate and maintain the filter according to the manufacturer's specifications.
As a filter gets dirty, the water flow to the heat pump is reduced. The higher the pressure on the
filter gauge, the lower the flow rate.
•Similar to a dirty filter, large amounts of debris in the pump and skimmer baskets can reduce
water flow. Keep baskets free of debris.
•Check for improper valve settings. A partially closed valve after the filter, or a full-open bypass
around the heater, will cause insufficient water flow through heater.
•If the conditions listed above remain unresolved, the water flow through the heater may be
reduced to a point where internal safety devices (i.e.: “HP” or “HP5”) shut the heater off.
•Before calling for service, always check the filter, the pump basket, and water valve positions. If
the problem persists, please call AquaCal Customer Support at: [phone].
Maintain Proper Water Flow
Control Water Chemistry
CAUTION- Pool/Spa Refinishing Operations
During pool refinishing or acid cleaning, the water flow through the heater must be shut off. Water flow
to the heater must remain off until water chemistry is once again in balance and the water is clear in
appearance. Failure to follow these instructions may void heater warranty.
MAINTENANCE & OPERATION (continued)
•IMPORTANT! Your heat pump is engineered for exceptional durability and reliability. And, this
unit’s heat exchanger—being equipped with titanium tubing—will be nearly impervious to water
chemistry damage. However, other components of the heater, and the remainder of the pool/spa
equipment in general, may be susceptible to damage from prolonged exposure to unbalanced
water chemistry. Likewise, bathers may be exposed to health risks if water chemistry is not
properly maintained.
•For the longevity of the entire pool/spa installation, and for the safety of bathers, it is strongly
recommended the water chemistry be checked regularly and maintained within proper norms.
Please see the table, below, for a complete listing of recommended water chemistry levels.
Chlorine . . . . . . . . . . . ........ . . .:
Bromine . . . . . . . . . . . . ........ . .:
pH . . . . . . . . . . . . . . . . . . ..........:
Total Alkalinity . . . . . . . . . ........:
Calcium Hardness . . . . . . . .....:
Total Dissolved Solids . . . . .....:
1.0 – 3.0 ppm in pools, 1.5 – 3.0 ppm in spas
2.0 – 4.0 ppm in pools, 3.0 – 5.0 ppm in spas
7.4 – 7.6 ppm in pools, 7.2 – 7.8 ppm in spas
80 – 140 ppm in pools, 80 – 120 ppm in spas
200 – 400 ppm in pools and spas
1,000 – 2,000 ppm in pools,
1,500 ppm above start-up TDS in spas
RECOMMENDED WATER CHEMISTRY STANDARDS*
* STANDARDS FOR COMMERCIAL APPLICATIONS MAY VARY LOCAL-TO-LOCAL...
ALWAYS MAINTAIN WITHIN LIMITS ESTABLISHED BY AUTHORITY HAVING JURISDICTION.

20
Maintain Proper Clearances Around Heater
•For maximum efficiency, proper air flow clearances around heater must be maintained.
•It is important to keep the area immediately adjacent to the heat pump clear of items such as
shrubs and bushes, lawn furniture, chemicals containers, etc. These items can prevent air from
circulating fully through the heater, and will result in inefficient operation or damage to the heat
pump.
•In addition, do not place objects on top of the heat pump; doing so will block the air from exiting
the heater, and will result in damage to the compressor and fan motor.
•Proper clearances are also necessary in order to access the working parts of your heater. A
heater that is easy to "get to," will be a heater that is easy to maintain; service and maintenance
personnel will thank you for keeping the area around your heater unobstructed.
•Please see diagrams, below, for specific clearance requirements.
•Control Irrigation: In regions were wells are used for irrigation, water quality is sometimes poor,
and water spray can damage heater components. Regardless of water quality, it is important
that irrigation be directed away from the heat pump.
•Prevent rain water runoff from pouring directly into the heater. The heater is designed to
withstand normal rainfall, but solid streams of water from roof drip-lines may eventually damage
heat pump components.
•If the heat pump resides beneath a roof edge, to promote heat pump longevity, a rain leader
(gutter), or rain shield, will be necessary.
Control Irrigation and Storm Run Off
MAINTENANCE & OPERATION (continued)
FRONT-SIDES-REAR
6-I
NCHES
(
R
EAR
)
12-
I
NCHES
(
SIDE
)
12-
I
NCHES
(
SIDE )
30-I NCHES
(
FRONT )
TOP VIEW (NOSCALE)
(REAR)
SQ MODELS, 12-INCHES;ALL OTHER, 6-INCHES
FRONT-REAR-OVERHEAD
R
AIN
R
UN
-O
FF
M
UST BE
D
IRECTED
A
WAY FROM
H
EATER
.
O
VERHANG WITH
G
UTTER
30” M
INIMUM
C LEARANCE , F RONT
6” M INIMUM C LEARANCE ,
5 FT . M INIMUM C LEARANCE ,
O
VERHEAD
SIDE VIEW (NOSCALE)
SQ MODELS, 12-INCHES
ALL OTHER, 6-INCHES
(REAR)