Aquacal 100 Programming manual

1
1/7/04
ATTENTIONINSTALLER:
THIS DOCUMENT IS PURCHASER’SPROPERTY AND IS TO REMAIN WITH THE HEAT PUMP OWNER
Pool and Spa
Heat Pump
Owner’s Manual
and
InstallationGuide
PN: LTP0051
6/1/05
&7
and
Models:
100, 120, & 155
Additional Labels:
APS
Fox Smart
South Beach
Tropez
HEATINGONLY
and
HEATING-COOLING

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1-800-786-7751 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)

4
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
DEALER-SPECIFIC INFORMATION (Installation & Set Up) ---------31
Dealer-Specific Table of Contents ---------------------------------32
CONTACTING THE FACTORY ------------------------------------------58

5
Welcome
eam
Tto the
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
heating pools and spas. For example, your heat pump is up to 400% more
efficient than gas, and, when compared
to electric 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 designed and built to provide years of
trouble-free operation.
Moreover, should you decide you would
like AquaCal to provide regular inspection
and maintenance of your heat pump—
which we do recommend—you will find
AquaCal’s factory-trained service staff is
the largest and most-qualified 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.”

6
Corrosion-Proof Cabinet
The cabinet, being made from resilient, UV-Protected ABS material, can never rust, fade
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.
ImportantFeaturesofYour
NewHeatPump
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 the hot summer months. For cooler climates,
Icebreaker® heat pumps offer unique advantages over passive defrost models. Please
read more below... Hot Gas Defrost*
Your Icebreaker® heat pump is uniquely equipped for active defrost. Active defrost
involves directing hot refrigerant gas to the heat collector, melting accumulated ice
away in a matter of a few minutes—then right back to heating. Standard heat pumps
may remain “off in defrost” for extended periods during very cold weather. Because of
its ability to continue to operate even during freezing weather, your Icebreaker extends
the swimming season longer than any other 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 piston-type compressors.
*Icebreaker ® Models Only
ThermoLink®Heat Exchanger
The heart of your heat pump is the patented ThermoLink heat exchanger. The primary
cause 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 suscep-
tible 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 tem-
peratures, and to prevent tampering by locking out controls via a pass code.

7
HOWAHEATPUMPWORKS
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 “0”–the point where all heat is absent–occurs at 459º Fahrenheit
below zero, 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.
WARMED WATER
OUT
HEAT LADEN
AIR ENTERS
COOL WATER
IN
HEAT REMOVED FROM AIR...
COOL AIR OUT

8
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 experienced
service personnel. Should you, the owner, suspect your heat pump is not performing
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: (800)
786-7751. For questions concerning installation, modifications, operation, service and
upkeep, please contact your installer or AquaCal Customer Support. Warranties may be
voided if the heater has been used, maintained, or repaired improperly.
In addition to possible voiding of warranties: unapproved installation methods, nonstandard
modifications, poor or incorrect maintenance, service by unqualified personnel, or improper
use of this unit, may result in personal injury and/or property damage. For personal
safety and to avoid damage to equipment, it is important that safety instructions displayed
on the heat pump, and within this manual, are read, understood, and followed.
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.
SAFETYINFORMATION
“Warning”signal appearsinthismanualwherespecialattentionisrequiredforpersonal
safety. (Specific instructions will appear in this box.)
Failuretoheedthe followingmayresultin perma-
nentinjury ordeath.
WARNING !
“Caution” signal appears in this manual where special care is required to avoid
equipment damage. (Specific instructions will appear in this box.)
Failuretoheedthefollowingmayresultinequipment
damage.
CAUTION !

9
Refrigerant Circuit Service Only by
Qualified, EPA Certified Technician
Notice: Heater NOT Repairable by Owner
Water Chemistry Safety
Improperwaterchemistrycanpresent aserioushealth hazard. Toavoidpossiblehazards,
maintainPool/Spawaterper standardsdetailedlater in this manual..
Failuretoheed thefollowingmayresult inpermanent
injuryordeath.
WARNING !
WARNING ! Failuretoheed thefollowingmayresult inpermanent
injuryordeath.
Heatercontainsrefrigerantunder pressure. Repairstotherefrigerant circuitmustnotbe
attemptedbyuntrainedand/orunqualifiedindividuals. Servicemust beperformedonlyby
qualifiedHVACtechnicians. Recoverrefrigeranttorelievepressurebeforeopeningsystem.
Water Temperature Safety
WARNING ! Failuretoheedthefollowing mayresultinpermanent
injuryordeath.
Heat pumps contain no owner-repairable components. Repairs must not be attempted
by untrained and/or unqualified individuals. If service is deemed necessary, contact
installingdealerorAquaCalCustomerSupportat(800)786-7751.
WARNING ! Failuretoheed thefollowingmayresult inpermanent
injuryordeath.
Prolongedimmersioninwaterwarmerthannormalbodytemperaturemaycauseacondi-
tionknownasHYPERTHERMIA. Thesymptomsofhyperthermiainclude:unawarenessof
impending hazard, failure to perceive heat, failure to recognize the need to exit the spa,
andunconsciousness. Theuseof alcohol,drugs,ormedication can greatlyincreasethe
riskoffatalhyperthermia. Inaddition,personshaving anadversemedicalhistory,orpreg-
nant women, should consult a physician before using a hot tub or spa. Children and the
extremeelderlyshould be supervisedbyaresponsible adult.
While your heat pump’s titanium-based heat exchanger provides nearly impervious
protectionagainstpoorwaterchemistry, improperwaterchemistrymaycause expensive
damage to pump, filter, pool shell, etc. To avoid equipment damage, maintain Pool/Spa
waterperstandardsdetailed later inthismanual.
Failuretoheedthe following canresultindamageto
equipment.
CAUTION !

10
HEATING-QUICKSTART&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
beilluminated;
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 owner settings can be set 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. The chosen mode will be
verified by an illuminated indicator light, located on the left side of the display, showing
that the POOL control has been selected (If heating just 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 (If heating just a POOL, using the DOWN arrow key, lower the SPAtemperature 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 Call-Flex programming
located in Owner Level Programming, beginning on page-14 of this manual.
INSTALLER- Is heater connected to an external controller? See: Dealer-Specific Instructions,
beginning on page-31 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 (only) 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
controller. Owners: if your installation includes an external controller, contact your installing
dealer for operational instructions.
These are instructions to quick-start 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 Programming, begin-
ning on page-14 of this manual.

11
NOTE: THE HEAT CONTROLLER INCORPORATES AN ANTI-SHORT CYCLE TIME DELAY. SHOULD OPERATION BE
INTERRUPTED, 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, cease 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 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. (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 (2-4 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; then, depending on which body of water is to be heated, use the
POOL / SPA selector key to select POOL or SPA ;
B. Position external water valves appropriately to flow water to & from the body of water and
through the heater;
C. Start the water pump...Within 4-minutes, depending on the status of the controller’s internal
time delay, the heater will start. 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 .

12
HEATERCONTROLS
Control Buttons, Indicator Lights, & Display
(AS INDICATED BY CIRCLED NUMBERS)
Control Panel Layout
(APPEARANCE VARIES BY MODEL)
1) POOL / SPA SELECTOR – Selects either pool or spa thermostat.
2) COOLING INDICATOR LIGHT – Indicates unit is cooling. (Note: This light and
associated text will not be present on 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.

13
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 a AquaCal Call/Flex add on kit, permits the use of CALL
or FLEX options.
FS....... Heater in Defrost Mode. This code appears as a normal display during
periods of lower air temperatures. Two possibilities follow:
Heat-Only Units: Fan continues to run and compressor is off. Compressor
will restart when air coil temperature rises to approximately 38°F.
Heat-Cooling (reversing) Units (Applicable in Heat Mode Only): if a
defrost cycle is necessary, the unit’s reversing valve will be activated.
While the reversing valve is activated, the fan operation will be
suspended to permit maximum heating of the air-coil. The reverse-cycle
will continue until the air-coil reaches a set temperature, or until 4-Minutes
has elapsed. Upon completion of the defrost cycle, the reversing valve
will be deactivated; normal fan and heating operation will resume. During
hot-gas defrost cycles, the compressor will not deactivate; rather, it will
continue in operation throughout the sequence.
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 damage
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 orAquaCal Customer Support at [phone].

14
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 (owner). These features reside at the Level-1 access
point within the microprocessor.
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. 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, orACH (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 UPARROW 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, depress 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, depress the key until the desired water temperature
reaches 45oF (minimum setting); then, depress 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. Depress 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. Depressing the [UPARROW] key will raise the set point 1-degree for every push of
the button. Depressing 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. Depressing the [UPARROW] key will raise the set point 1-degree for every push of
the button. Depressing 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 depress and hold both the [UPARROW] 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 UCL Option:
1) Depress either the UP or DOWN ARROW keys; if “LOC” is momentarily displayed
flowed by “0”, the ULC feature is enabled. If “0” displays proceed to “6)” of this section;
otherwise, see number “2” below.
2) Simultaneously depress and hold both the [UP ARROW] and [DOWN ARROW] keys
until [CF1] (Celsius / Fahrenheit) code appears.
3) Depress 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, depressing 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 depress 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]:
GeneralInformation:
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 depress and hold the [UPARROW] and [DOWN ARROW] keys until the
display shows “CF1”. Depress 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 depress 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
OPERATIONALRECOMMENDATIONS
&
The information in this section is written primarily for the Home Owner, but may also apply to servicing
dealersor HVAC servicecenters. This sectioncontainsinformation concerningplanned 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).
Heatpumps shouldbe inspectedandmaintained onan annualbasisby aqualified swimmingpoolheat
pumpspecialist. Additionally, ifthe heatpumpis locatedon thebeach, orata seawall wheresaltspray
and sand can become detrimental factors, more frequent service may be necessary. For service plan
information,please see:Planned MaintenanceProgram,later inthissection, andthen contactAquaCal
Customer Support at: 800-786-7751.
Whileannualmaintenance isrecommended tomaintainyour warranty, ifyou choosenot 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,
pleasecontactAquaCalCustomer Support:1-800-786-7751;request thedocumenttitled: “Appearance
Care forAir-Source Heat Pumps: Approved Method for Home Owners.”
General Maintenance
Donotuseapressurecleanertowashheatpump.... Damagetoevaporatorfins,as
wellasothercomponents,willresult.
Failuretoheedthe following mayresultindamage to
equipment.
CAUTION !
POSSIBLEELECTRICSHOCKHAZARD...Shouldyoudecide to wash the heat pump
viawaterhose,disconnect all powertothepoolequipment pad- including, butnotlimited
to: Theheatpump,waterpump,andanyandallotherelectricalequipment. DoNOTspray
waterdirectlyinto electricalcomponents. DoNOTrestore electricalpoweruntilsuch time
asallwaterhas dried completely.
Failuretoheed thefollowingmayresult inpermanent
injuryordeath.
WARNING !
Safety During Cleaning Operations

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 basket can reduce water flow. Keep
basket free of debris.
•Check for improper valve settings.Apartially 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 shut the heater off.
•Before calling for service, always check the filter, the pump basket, and water valve positions. If
the problem persists, please callAquaCal Customer Support at: (800)786-775.
Maintain Proper Water Flow
Control Water Chemistry
•IMPORTANT!AllAquaCal heat pumps are engineered for exceptional durability and reliability.
And, this heater—being equipped with a titanium heat exchanger—will be nearly impervious to
water chemistry damage. However, the remainder of the pool/spa equipment 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.
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.
Chlorine.... . ..... . ........ ...:
Bromine..... . . ............. . .:
pH..... . . . ...... . . . ...........:
TotalAlkalinity .. . .... ..........:
CalciumHardness.. . .........:
Total DissolvedSolids... . .....:
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
MAINTENANCE & OPERATION (continued)

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 lock 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
100 & 120 M ODELS 12-I NCHES
155 M
ODELS 24-I NCHES
(
R
EAR
)
24-
I
NCHES
(
SIDE )
24-
I
NCHES
(
SIDE )
30-I NCHES
(
FRONT )
TOP VIEW (NOSCALE)
5 FT. MINIMUM
CLEARANCE
100 & 120 MODELS
1- FT.
155 MODELS 2-FT.
30” MINIMUM
CLEARANCE
OVERHANG
WITH GUTTER
RAIN RUN-OFF
MUST BE
DIRECTED AWAY
FROM UNIT.
(REAR)
SIDE VIEW (NOSCALE)
MAINTENANCE & OPERATION (continued)