Carrier AQUAZONE 50KQL07-19 Operation manual

Copyright 2008 Carrier Corporation Form 50KQL-2PD
Single-package console water source
heat pump with self-contained line
voltage thermostats.
• Suitable for either geothermal or
boiler/tower applications with
operating temperature range from
20 F to 110 F
• Thermostatic expansion valve
(TXV) provides efficient and reliable
refrigerant flow
• Rubber grommet mounted
compressors for quiet operation
• Sloped top cabinet with powder
paint finish
• Right or left hand piping connection
• Multiple unit-mounted and remote
thermostat options
• Adaptable cabinet and subbase
configurations
• Factory-mounted flow regulators and
control valves for easy installation
• Flexible and reliable controls
accommodate all systems
Features/Benefits
Aquazone console water
source heat pumps are a
flexible, attractive alternative
for all finished interior space,
under-window style
installations.
Operating efficiency
Aquazone water source heat pump
(WSHP) units are designed for quality
and performance excellence over their
lifetime. Units offer standard cooling
EERs (energy efficiency ratios) up to
12.1 for boiler/tower systems and as
high as 19.5 for geothermal applica-
tions. Heating COPs (coefficients of
performance) are as high as 4.9,
among the highest in the industry.
AQUAZONE™
50KQL07-19
Water Source Heat Pumps
Console Unit
1/2to 11/2Nominal Tons
Product
Data
TM

2
Quiet operation
The console WSHP unit provides ex-
ceptionally quiet operation for maxi-
mum comfort.
Design flexibility
Aquazone™ console WSHP units are
offered in 5 capacity sizes and 3 differ-
ent voltages to meet individual zone
needs efficiently and effectively.
Standard and extended operating
range units are available to suit a
variety of application requirements.
Safe, reliable operation
Standard safety features include high
and low pressure monitoring and field
selectable water and air coil freeze pro-
tection sensing. All safety controls may
be reset at the thermostat. Each unit is
tested and run at the factory to ensure
proper operation of all components
and safety switches.
All components are carefully
designed and selected for endurance,
durability, and carefree day-to-day
operation.
The water-to-refrigerant heat
exchanger has copper inner and steel
outer tubing which is painted on the
outside to provide corrosion resistance
protection. Cupronickel heat exchang-
ers are available and should be used on
all open loop applications.
Units are rated and certified in
accordance with ARI (Air Conditioning
and Refrigeration Institute)/ISO/
ASHRAE (American Society of Heat-
ing, Refrigerating and Air Conditioning
Engineers) 13256-1 performance
standard, and are CSA (Canadian
Standards Association)/NRTL (Nation-
ally Recognized Testing Lab) listed.
Installation ease
The unit is packaged for simple, low
cost handling, with minimal time re-
quired for installation. The console unit
arrives at the jobsite fully assembled to
minimize installation time and reduce
installation cost. All units are pre-wired
and factory charged with R-22
refrigerant.
Water connections are available in a
variety of configurations direct from
the factory. The standard configuration
is 5/8in. OD Sweat connections for
maximum flexibility in the field. Both
FPT and MPT are available as factory-
installed options to improve installation
efficiency. Additionally, factory-
installed motorized water shutoff
valves are available for use on energy
conserving systems employing a
variable pumping technique.
The standard electrical connections
are made quickly and directly to a pow-
er distribution terminal block. To fur-
ther improve installation efficiency, a
fused or unfused disconnect switch as
well as a 20 amp plug and cord are
available as factory-installed options.
A 5/8in. ID vinyl condensate con-
nection is provided for connection to
the field-installed condensate line.
Compact cabinet design dimen-
sions are 12 in. deep, 48 in. wide and
24 in. tall (with 3 in. subbase). For flex-
ibility, the controls can be mounted on
the top right or left side. Additionally,
the sloped top design discourages the
use of the unit as a shelf or coffee hold-
er, preventing air blockage and any
spills from damaging the unit.
No-fuss maintenance and
serviceability
Regular maintenance or service to the
console WSHP units require little time.
Large service access panels enable
quick inspection for problem solving
and the control box swings down for
easy access to the controls.
Fan motor sleeve bearings are
permanently lubricated for worry-free
performance. If the unit does require
service, an easily removable cabinet
and slide out fan section make access
simple.
Refrigerant circuit protection is de-
signed to result in fewer service calls.
Units are equipped with easily accessi-
ble service access ports on both the
suction and the discharge refrigerant
lines for on-site testing and environ-
mentally correct refrigerant recovery.
Filter racks provide easy filter access
for cleaning.
Maximum control flexibility
Aquazone water source heat pumps
provide reliable control operation using
a standard microprocessor board.
Flexible alternatives for many direct
digital controls (DDC) applications in-
clude the Carrier Comfort Network®
(CCN) and open protocol systems.
The Aquazone standard unit solid-
state control system, the Complete C,
provides control of the unit compres-
sor, reversing valve, fan, safety fea-
tures, and troubleshooting fault indica-
tion features. The Complete C control
system is one of the most user friendly,
low cost, and advanced control boards
found in the WSHP industry. Many
features are field selectable to provide
Features/Benefits (cont)
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ARI/ISO Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-13
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14,15
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-21
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-24
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25-31
Typical Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33-35

3
the ultimate in field installation flexibili-
ty. The overall features of this standard
control system include:
50-va transformer —The trans-
former assists in accommodating
accessory loads.
Anti-short cycle timer —Timer
provides a minimum off time to pre-
vent the unit from short cycling. The
5-minute timer energizes when the
compressor is deenergized, resulting in
a 5-minute delay before the unit can be
restarted.
Random start relay — Random start
relay ensures a random delay in ener-
gizing each different WSHP unit. This
option minimizes peak electrical
demand during start-up from different
operating modes or after building
power outages.
High and low pressure refrigerant
protection —This protection safe-
guards against unreliable unit operation
and prevents refrigerant from leaking.
Condensate overflow sensor —
The electronic sensor is mounted to
the drain pan. When condensate pan
liquid reaches an unacceptable level,
unit is automatically deactivated and
placed in a lockout condition. Thirty
continuous seconds of overflow is rec-
ognized as a fault by the sensor.
High and low voltage protection
—This safety protection for excessive
or low voltage conditions.
Automatic intelligent reset —Unit
shall automatically restart 5 minutes
after shutdown if the fault has cleared.
Should a fault occur 3 times sequen-
tially, lockout will occur.
Accessory output —Twenty-four
volt output is provided to cycle a
motorized water valve or damper actu-
ator with compressor in applications
such as variable speed pumping
arrangements.
Performance monitor (PM) —This
unique feature monitors water temper-
atures to warn when the heat pump is
operating inefficiently or beyond typi-
cal operating range. Field selectable
switch initiates a warning code on the
unit display.
Water coil freeze protection
(selectable for water or anti-
freeze) —A field selectable switch for
water and water/glycol solution sys-
tems initiates a fault when tempera-
tures exceed the selected limit for 30
continuous seconds.
Air coil freeze protection (check
filter operation) —A field selectable
switch for assessing excessive filter
pressure drop initiates a fault when
temperatures exceed the selected limit
for 30 continuous seconds.
Alarm relay setting — A selectable
24-v or pilot duty dry contact provides
activation of a remote alarm.
Electric heat option —An output is
provided on the controller for operating
two stages of emergency electric heat.
Service Test mode with diagnostic
LED (light-emitting diode) —The
Test mode allows service personnel to
check the operation of the WSHP and
control system efficiently. Upon
entering Test mode, time delays are
sped up, and the Status LED will flash
a code to indicate the last fault
experienced for easy diagnosis. Based
on the fault code flashed by the status
LED, system diagnostics are assisted
through the use of Carrier provided
troubleshooting tables for easy refer-
ence to typical problems.
LED visual output —An LED panel
indicates high pressure, low pressure,
low voltage, high voltage, air/water
freeze protection, condensate over-
flow, and control status.
PremierLink™ controller adds
reliability, efficiency, and
simplification
The PremierLink direct digital control-
ler can be ordered as a factory-installed
option. Designed and manufactured
exclusively by Carrier, the controller
can be used to actively monitor and
control all modes of operation as well
as monitor the following diagnostics
and features: unit number, zone tem-
perature, zone set point, zone humidity
set point, discharge air temperatures,
fan status, stages of heating, stages of
cooling, outdoor-air temperature,
leaving-air temperature, leaving water
temperature, alarm status, and alarm
lockout condition.
This controller has a 38.4 kilobaud
communications capability and is com-
patible with ComfortLink™ controls,
CCN and ComfortVIEW™ software.
The scrolling marquee and Navigator™
display are optional tools that can be
used for programming and monitoring
the unit for optimal performance. The
addition of the Carrier CO2sensor in
the conditioned space provides
ASHRAE 62-99 compliance and de-
mand controlled ventilation (DCV). A
DCV control strategy is especially ben-
eficial for a water source heat pump
system to minimize the energy utilized
to condition ventilation air. The DCV
approach enhances the energy effi-
cient performance of the Aquazone
unit.
The PremierLink peer-to-peer, In-
ternet ready communicating control is
designed specifically for constant vol-
ume (CV) and variable volume/variable
temperature (VVT®) applications. This
comprehensive controls system allows
water source heat pumps to be linked
together to create a fully functional
HVAC (heating, ventilation, and air
conditioning) automation system.

4
Model number nomenclature
Aquazone™ Water Source Heat
Pump Console Unit
*Right and left hand orientation is determined by looking at front of unit.
†Available with Complete C control system only.
**Sizes 07-12 only.
††Not available with sizes 15 and 19.
***20A plug and cord not available for 265-v units.
a50-8273

5
LEGEND NOTES:
1. Ratings are in accordance with and certified to ARI/ISO Standard
13256-1.
2. Cooling capacities are based on 80.6 F db, 66.2 F wb entering air
temperature and 86 F entering water temperature.
3. Heating capacities are based on 68 F db, 59 wb entering air tem-
perature and 68 F entering water temperature.
4. All airflow is rated on high speed.
5. All ratings are based on operation at lower voltage of dual voltage
rated models.
Physical data
LEGEND
50KQL UNIT
SIZE
WATER LOOP HEAT PUMP
Cooling Heating Airflow
(cfm)
Water
Flow
(gpm)
Pressure
Drop
(ft wg)
TC SC THR Input Power
(kW) EER TC Input Power (kW) COP
07 7.8 6.6 10.0 0.645 12.1 10.4 0.622 4.9 240 1.9 1.5
09 9.3 7.2 11.9 0.775 12.0 12.0 0.799 4.4 300 2.5 3.1
12 12.3 9.5 15.9 1.060 11.6 15.0 0.999 4.4 350 3.1 3.8
15 13.8 11.2 17.8 1.169 11.8 17.3 1.152 4.4 400 3.6 3.0
19 16.0 11.9 20.6 1.333 12.0 19.3 1.346 4.2 460 4.8 5.0
50KQL UNIT
SIZE
GROUND WATER HEAT PUMP GROUND LOOP HEAT PUMP
Cooling 59 F Heating 50 F Cooling 77 F Heating 32 F
TC EER TC COP TC EER TC COP
07 8.9 19.5 8.4 4.3 8.0 14.0 6.5 3.6
09 10.3 18.1 9.7 3.8 10.0 14.0 7.8 3.4
12 13.7 17.8 12.4 3.8 12.8 13.4 9.8 3.3
15 15.2 17.3 14.0 3.8 14.1 13.5 11.0 3.3
19 17.8 17.3 16.0 3.7 16.4 13.4 12.5 3.1
ARI — Air Conditioning and Refrigeration Institute
COP — Coefficient of Performance
db — Dry Bulb Temperature
EER — Energy Efficiency Ratio
ISO — International Organization for Standardization
MBtuh — Btuh in Thousands
TC — Total Capacity (MBtuh)
THR — Total Heat of Rejection (MBtuh)
SC — Sensible Capacity (MBtuh)
wb — Wet Bulb Temperature
50KQL BASE UNIT 07 09 12 15 19
NOMINAL COOLING CAPACITY (Btuh) 7,800 9,300 12,300 13,800 16,000
COMPRESSOR Rotary
BLOWER
Motor Horsepower
Wheel Size D x W (in.) 2 each
1/20
51/4x 61/4
1/15
51/4x 61/4
1/15
51/4x 61/4
1/6
51/4x 61/4
1/6
51/4x 61/4
FILTER SIZE (in.) Bottom Return 8 x 291/2x 3/88 x 291/2x 3/88 x 291/2x 3/88 x 291/2x 3/88 x 291/2x 3/8
FILTER SIZE (in.) Front Return 7 x 291/2x 1/87 x 291/2x 1/87 x 291/2x 1/87 x 291/2x 1/87 x 291/2x 1/8
UNIT WEIGHT (lb)
Shipping
Operating
181
173
185
177
195
187
201
193
206
198
REFRIGERANT TO AIR HEAT EXCHANGER
Face Area (sq ft)
No. of Rows Deep
Copper Tube Size OD (in.)
Fin Spacing (FPI)
1.4
2
3/8
13
1.4
2
3/8
13
1.4
3
3/8
13
1.8
3
3/8
13
1.8
3
3/8
12
REFRIGERANT CHARGE (R-22)/CKT (oz)
No. of Circuits
16
1
16
1
21
1
27
1
24
1
UNIT CABINET WITH STANDARD SUBBASE
Width x Height x Depth (in.) 48 x 24 x 12 48 x 24 x 12 48 x 24 x 12 48 x 24 x 12 48 x 24 x 12
WATER IN/OUT SIZE OD SWEAT (in.) 5/85/85/85/85/8
CONDENSATE SIZE ID VINYL (in.) 5/85/85/85/85/8
FPI — Fins Per Inch
ARI/ISO capacity ratings

6
Factory-installed options
Cupronickel heat exchangers are available for higher
corrosion protection for applications such as open tower,
geothermal, etc. Consult the water quality guidelines for
proper application and selection of this option.
Thermostat options include a unit-mounted manual
changeover (MCO) or auto changeover (ACO) thermostat.
The temperature set point knob and pushbutton switches
for fan speed and cool/heat mode (MCO) thermostat selec-
tion are conveniently located on the top. The thermostat
senses the return-air temperature and sends the appropri-
ate signal to the controller for cooling or heating mode of
operation.
Options R and S allow connection to a remote wall-
mounted thermostat. The Complete C controller requires a
heat pump thermostat. The Deluxe D controller can be
configured for heat pump or heat/cool thermostat. See the
50KQL Control Options Table.
Extended range is provided to insulate the coaxial coil to
prevent condensation, and therefore potential dripping
problems, in applications where entering water tempera-
ture is below the normal operating range (less than 60 F).
Cabinet options include a locking control panel for
added security. Bottom or front return with left or right
hand configurations are available for ease of installation.
Cabinets are available with 3 or 5 in. subbase, with or with-
out motorized damper.
Motorized fresh air damper can be provided with the
unit-mounted thermostat. The damper opens when LOW
or HIGH fan speed selections are made from the push but-
ton switches. When STOP or FAN ONLY selections are
made the spring return on the damper motor closes the
damper. With remote thermostat the motorized fresh air
damper opens when the fan is running.
Piping connections can be provided on either the right
or left hand side of the unit, for easy installation. Orienta-
tion is determined by facing the unit from the front side.
Automatic flow regulators include internally mounted
2.25 or 3.0 gpm/ton automatic flow regulating valves for
easier installation.
Two-way motorized control valve can be provided with
a copper or cupronickel heat exchanger for applications
involving open type systems or variable speed pumping.
This valve will slowly open and close in conjunction with the
compressor operation to shut off or turn on water to the
unit. Standard two-way valve performance includes Cv of
2.9 and maximum operating pressure differential (MOPD)
of 125 psi.
Mute package includes high density noise suppression
material on front, right, and left sides of compressor
compartment and 1/2-in. fiberglass insulation on all
insulated surfaces, for extra-quiet operation in the most
critical applications.
Deluxe D control system provides the same functions
as the Complete C control system while incorporating
additional flexibility and functions to include the following.
See the 50KQL Control Options Table.
Thermostat input capabilities accommodate emergency
shutdown mode and night setback (NSB) with override
potential. Night setback from low temperature thermostat
with 2-hour override is initiated by a momentary signal
from the thermostat.
Compressor relay staging used with dual stage units (units
with 2 compressors and 2 Deluxe D controls) or in master/
slave applications.
Boilerless electric heat control system allows automatic
changeover to electric heat at low loop water temperature.
Intelligent reversing valve operation minimizes reversing
valve operation for extended life and quiet operation.
Thermostat type select (Y, O or Y, W) provides ability to
work and select heat pump or heat/cool thermostats (Y, W).
Reversing valve signal select (O or B) provides selection for
heat pump O/B thermostats.
Dehumidistat input provides operation of fan control for
dehumidification operation.
Multiple units on one thermostat/wall sensor provides
communication for up to three heat pumps on one
thermostat.
Boilerless changeover temperature provides selection of
boilerless changeover temperature set point.
Accessory relays allow configuration for multiple applica-
tions including fan and compressor cycling, digital night
setback (NSB), mechanical night setback, water valve oper-
ation, and outside air damper operation.
Night low limit with Deluxe D controller, helps maintain
the space temperature at a level that is the best compro-
mise between energy consumption and a safe space tem-
perature. If the unit operation is turned OFF from either
the push button switches, remote thermostat or the energy
management system, it is possible that the space tempera-
ture could drop uncontrollably. The thermostat is located
near the return air filter activates the blower and compres-
sor operation when the space temperature falls below
DESCRIPTION
FACTORY-
INSTALLED
OPTIONS
FIELD-
INSTALLED
OPTIONS
Cupronickel Heat Exchangers X
Thermostat Options X
Extended Range X
Cabinet Options X
Motorized Fresh Air Damper X
Piping Connections X
Automatic Flow Regulators X
Two-Way Motorized Control
Valve X
Mute Package X
Deluxe D Control System X
PremierLink™ Controller X
Aquazone™ Thermostats X
Aquazone System Control Panel X
Fire-Rated Hoses X
Ball Valves X
Y Strainers X
Solenoid Valves X
Hose Kit Assemblies X
Remote Sensors X
PremierLink Accessories X
Options and accessories

7
50 F. When return air temperature is raised above 55 F the
compressor and blower stop.
Override function is available for units operating in occu-
pied/unoccupied mode under the control of an external
timeclock or an energy management system. A contact
closure from the timeclock or energy management system
shorts the NSB and C terminal on the Deluxe D controller
signaling an unoccupied mode.
For units with the unit-mounted thermostat, pressing
override switch (located under control access door) will
override the unoccupied mode and allow the occupied
mode of operation to continue for a period of two hours.
The units with the remote wall-mounted thermostat
require a digital thermostat with the override function. In
unoccupied mode an accessory relay is energized on the
Deluxe D controller. The NO/NC contacts of the relay can
be used as appropriate input to the digital thermostat to
signal occupied/unoccupied mode. The thermostat selects
cooling/heating set points based on occupied/unoccupied
mode.
PremierLink™ controller is compatible with the Carrier
Comfort Network® (CCN) and other building automation
systems (BAS). This control is designed to allow users the
access and ability to change factory-defined settings thus
expanding the function of the standard unit. See the
50KQL Control Options Table.
50KQL CONTROL OPTIONS TABLE
LEGEND
Field-installed accessories
Carrier’s line of Aquazone™ thermostats (used with
remote thermostat units) are both attractive and multi-
functional, accommodating stand-alone water source heat
pump installations.
Programmable 7-day thermostat offers 2-stage heat,
2-stage cool, auto changeover, 7-day programmable with
copy command, 4 settings per day, fully electronic, 24 vac,
backlit LCD, keypad lockout, no batteries required,
5-minute compressor protection, NEVERLOST™ memory,
3 security levels, and temperature display in degrees F or C.
Programmable 7-day light-activated thermostat offers
same features as the 7-day programmable thermostat and
includes occupied comfort settings with lights on, and
unoccupied energy savings with lights off.
Programmable 7-day flush-mount thermostat offers same
features as the 7-day programmable thermostat and
includes locking coverplate with tamper proof screws, flush
to wall mount, holiday/vacation programming, set point
limiting, dual point with adjustable deadband, O or B termi-
nal, and optional wall or duct-mounted remote sensor.
Programmable 5-day thermostat offers 2-stage heat,
2-stage cool, auto changeover, 5-minute built-in compres-
sor protection, locking cover included, temperature display
in degrees F or C, keypad lockout, backlit display, 5-1-1
programming, O or B terminal, dual set point with adjust-
able deadband, configurable display, self-prompting pro-
gram, and 4 settings per day.
Non-programmable thermostat offers 2 heat stages, 2 cool
stages, auto changeover, 5-minute built in compressor pro-
tection, locking cover included, temperature display in
degrees F or C, keypad lockout, large display, back-lit dis-
play, O or B terminal, and dual set point with adjustable
deadband, backplate with terminals.
Aquazone system control panel includes a pre-
programmed, easy to use, Carrier Comfort Controller set
up for a WSHP system.
• Coordinates, monitors, and controls all WSHP units
and ancillary equipment including cooling towers, boil-
ers, and system pumps.
• The 50RLP model nomenclature is used to customize
the panel to control all WSHP system requirements.
• A panel can be ordered to include 2, 4, 6, or 8 stages
of system heat rejection and heat addition.
• A panel can be ordered with unique WSHP zone operation
capabilities for stand alone systems (i.e., non-communicating)
to control 10 or 18 zones of WSHP units.
• A panel can be ordered to control variable frequency
cooling tower fan operation.
• System pumping operation can be configured for start/
stop, lead/lag, or variable frequency pump operation.
• Direct digital controls (DDC) compatible using the Car-
rier Comfort Network (CCN) and WSHP units utilizing
PremierLink CCN controllers.
Fire-rated hoses are 2 ft long and have a fixed MPT on
one end and a swivel with an adapter on the other end.
Hose kits are provided with both a supply and return hose
and can be either stainless steel or galvanized. Five sizes
are available (1/2, 3/4, 1, 11/4, 11/2in.).
Ball valves (brass body) are used for shutoff and
balancing water flow and are available with memory,
memory stop, and pressure temperature ports. Valves con-
sist of UL-listed brass body, ball and stem type with Teflon*
seats and seals. Five sizes are available (1/2, 3/4, 1, 11/4,
11/2in.).
Y strainers (bronze body) are “Y” type strainers with a
brass cap. With a maximum operating pressure rating of
450 psi, the strainer screen is made of stainless steel.
Strainers are available with blow down valves. Five sizes
are available (1/2, 3/4, 1, 11/4, 11/2in.).
Solenoid valves (brass body) offer 3.5 watt coil,
24 volt, 50/60 Hz, 740 amps inrush, and .312 amps
holding. Valves operate slowly for quiet system application.
Five sizes are available (1/2, 3/4, 1, 11/4, 11/2in.).
OPTION CONTROLLER THERMOSTAT FUNCTIONS TRANSFORMER
AComplete C MCO — 50 VA
BDeluxe D MCO Night Low Limit
2-Hr Override 75 VA
CComplete C ACO — 50 VA
DDeluxe D ACO Night Low Limit
2-Hr Override 75 VA
PComplete C with
PremierLink LINKAGE DDC System 50 VA
RComplete C REMOTE — 50 VA
SDeluxe D REMOTE Night Low Limit
2-Hr Override 75 VA
ACO — Auto Changeover
DDC — Direct Digital Controls
MCO— Manual Changeover
*Teflon is a trademark of E. I. du Pont de Nemours and Company.

8
Hose kit assemblies provide all the necessary compo-
nents to hook up a water-side system. Supply hose
includes a ported ball valve with pressure temperature
(P/T) plug ports, flexible stainless steel hose with swivel
and nipple. Return hose includes a ball valve, preset auto-
matic balancing valve (gpm) with two P/T ports, flexible
stainless steel hose with a swivel and nipple, balancing
valve, and low-pressure drop water control valve.
Remote sensors are available for Aquazone™ flush
mount thermostats. Sensors are available for wall (wired
and wireless) or duct mounted applications.
PremierLink™ accessories are available to provide a
fully integrated WSHP DDC system. Accessories include
supply air temperature sensors (with override and/or set-
point adjustment), communicating room sensors, CO2sen-
sors (for use in demand control ventilation), and linkage
thermostats (to control multiple units from one thermostat).
Options and accessories (cont)
COOL
HEAT
AUTO
R
5-DAY PROGRAMMABLE/NON-PROGRAMMABLE
AUTO
Pm
COOL
HEAT
Carrier
®
AQUAZONE THERMOSTATS
(FOR USE WITH REMOTE THERMOSTAT UNITS)
7-DAY PROGRAMMABLE/LIGHT-ACTIVATED
PROGRAMMABLE 7-DAY PROGRAMMABLE FLUSH MOUNT
PREMIERLINK COMMUNICATING CONTROL

9
Dimensions
50KQL BOTTOM RETURN CABINET DIMENSIONS — RIGHT HAND PIPING
Notes:
1. Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
Shown is 76mm subbase. Add 50.8mm to dimension shown for 127mm subbase.
11.5
(292) *2.9
(74)
3.5
(88.9)
(607)
DAMPER OPENING*
48
(1219)
1.63
(41)
11.75
(298)
9.81
(249)
0.59
(15)
21
(533)
*2.9
(74)
REAR VIEW
Air
Inlet
Discharge
Air
1.56
(40)
3.5
(89)
0.75
(19)
R.H. Pipe &
Electric Area
1 (25)
1 (25)
4.5
(114)
(508)
(305)
(254)
BOTTOM VIEW
5
(127)
(406)
FRONT VIEW
Control Access Door
AIR INLET AREA
48.0
(1219)
(851)
1.75
(44.5)
(1219)
1.9
(48)
SIDE
VIEW
REAR
ACCESS
Filter located inside and at
top of air inlet area. Push
tabs back and down to release
filter for replacement.
33.5
16
30°
*23.9
12.0
48.0
10.0
20
*Dimension shown is with 3 in. (76.2 mm) subbase. Add 2 in. (50.8) to dimension shown for 5 in. (127 mm) subbase.
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.

10
Dimensions (cont)
50KQL BOTTOM RETURN CABINET DIMENSIONS — LEFT HAND PIPING
11.5
(292) *2.9
(74)
3.5
(88.9)
(607)
DAMPER OPENING*
48.0
(1219)
1.63
(41)
11.75
(298)
9.9
(251)
0.59
(15)
21.0
(533)
*2.9
(74)
REAR VIEW
Air
Inlet
Discharge
Air
(305)
BOTTOM VIEW
12.6
(320)
FRONT VIEW
Control Access Door
AIR INLET AREA
(1219)
1.75
(44.5)
(1219)
1.5
(38)
1.9
(48)
1.56
(40)
3.5
(89)
0.75
(19)
L.H. Pipe &
Electric Area
10.0
(254)
REAR
ACCESS
1 (25)
1 (25)
4.5
(114)
20.0
(508)
SIDE
VIEW
Filter located inside and at top of air
inlet area. Push tabs back and down
to release filter for replacement.
33.5
(851)
48.0
48.0
12.0
*23.9
30°
Notes:
1. Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
Shown 76mm subbase. Add 50.8mm to dimension shown for 127mm subbase.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
*Dimension shown is with 3 in. (76.2 mm) subbase. Add 2 in. (50.8) to dimension shown for 5 in. (127 mm) subbase.
NOTES:
1. Dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
a50-7385ef.eps

11
50KQL FRONT RETURN CABINET DIMENSIONS — RIGHT HAND PIPING
Notes:
1.
All dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
3.5
(88.9)
(533)
21.0
(533)
REAR VIEW
Discharge
Air
REAR
ACCESS
1 (25)
1 (25)
4.5
(114)
(508)
(305)
5
(127)
(406)
FRONT VIEW
Control Access Door
(1219)
(1110)
7.9
(201)
(533)
R.H. Pipe &
Electric Area
(1219)
(305) BOTTOM VIEW
48.0
(1219)
SIDE
VIEW
Air
Inlet
Filter located behind return
air grille and requires removal of
cabinet front for access.
21.0
48.0
43.7
12.0
16
30°
21.0
48.0
12.0
20.0
NOTES:
1. All dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.

12
Dimensions (cont)
50KQL FRONT RETURN CABINET DIMENSIONS — LEFT HAND PIPING
Notes:
1.
All dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
30°
3.5
(88.9)
(533)
21.0
(533)
REAR VIEW
Discharge
Air
REAR
ACCESS
(114)
(305)
1.5
(38.1)
12.6
(320)
FRONT VIEW
Control Access Door
(1219)
(1110)
7.9
(201)
12.0
(305)
BOTTOM VIEW
48.0
(1219)
4.5
1 (25)
1 ( 25)
(508)
L.H. Pipe &
Electric Area
SIDE
VIEW
Air
Inlet
Filter located behind return
air grille and requires removal of
cabinet front for access.
20.0
(1219)
48.0
(533)
21.0
48.0
43.7
21.0
12.0
NOTES:
1. All dimensions are shown in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.

13
50KQL CHASSIS DIMENSIONS
Notes:
* For installed dimension, add to dimension shown 74mm with 76mm subbase and
124mm for 127mm subbase.
1. Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
3. Water connection in same location regardless of connection type.
(293)
Optional Disconnect Box
(mounted to cabinet not chassis)
Optional
Motorized
Water Valve
Optional
Autoflow
Valve
Water Connections
5/8” (15.9 mm)
OD Copper,
1/2” FPT or
1/2” MPT
Power Supply
Water Out
Water In
Blower Deck
Blower Access Panel
Compressor
Access
Panel
Control Box
3.50
(89) 1.93
(49)
40.98
(1041)
4.49
(114) 0.75
(19)
20.44
(52)
3.88
(99)
11.5 4
3.22
(82)
*1.94
(49)
*16.66
(423)
*7.06
(179)
30°
0.87
(22)
3.01
(76)
5.36
(136)
Condensate
5/8” (15.9 mm)
ID Vinyl Hose
7.5
(191)
3.42
(87)
3.56
(90)
0.75
(19)
Optional Disconnect Box
(mounted to cabinet not chassis)
Optional
Motorized
Water Valve
Optional
Autoflow
Valve
Water Connections
5/8” (15.9 mm)
OD Copper,
1/2” FPT or
1/2” MPT
ID Vinyl Hose
Power Supply
Water Out
Water In
Blower Deck
Blower Access Panel
Compressor
Access
Panel
Control Box
7.5
(191)
0.87
(22)
0.99
(25)
3.88
(99) 11.5
4
(293)
3.43
(87)
*1.94
(49)
*7.06
(179)
*16.66
(423)
3.01
(76)
5.36
(136)
0.75
(19) (19)
4.46
(113)
20.50
(521)
3.28
(83)
40.98
(1040)
Condensate
5/8” (15.9 mm)
3.56
(90)
1.84
(47)
30°
0.75
RIGHT HAND CONFIGURATION
LEFT HAND CONFIGURATION
*For installed dimension, add 2.9 in. (73.7 mm) to dimension shown for a unit with 3 in.
(76.2 mm) subbase and 4.9 in. (124.5) for a unit with 5 in. (127 mm) subbase.
NOTES:
1. Dimensions shown are in inches. Dimensions in parentheses are in millimeters.
2. Optional autoflow valve, motorized water valve and disconnect box are shown.
3. Water connection in same location regardless of connection type.

14
I Determine the actual cooling and heating
loads at the desired dry bulb (db) and wet
bulb (wb) conditions.
Assume cooling load at desired dry bulb 80 F and
wet bulb 66 F conditions are as follows:
Given:
Total Cooling (TC). . . . . . . . . . . . . . .11,750 Btuh
Sensible Cooling (SC) . . . . . . . . . . . . .8,650 Btuh
Entering-Air Temperature db . . . . . . . . . . . . 80 F
Entering-Air Temperature wb . . . . . . . . . . . 66.2 F
II Determine the following design parameters.
Determine entering water temperature, water flow
rate (gpm), airflow (cfm), water flow pressure drop
and design wet and dry bulb temperatures. Airflow
cfm should be between 300 and 450 cfm per ton.
For applications using multiple units, the water pres-
sure drop should be kept as close as possible across
units to make water balancing easier. Enter the
50KQL12 Performance Data tables and find the
proper indicated water flow and water temperature.
For example:
Entering Water Temp . . . . . . . . . . . . . . . . . 90 F
Water Flow (Based upon
10 F rise in temp) . . . . . . . . . . . . . . . . . . 3.1 gpm
Airflow Cfm . . . . . . . . . . . . . . . . . . . . . . 308 cfm
III Select a unit based on total cooling and total
sensible cooling conditions. Unit selected
should be closest to but not larger than the
actual cooling load.
Enter tables at the design water flow and water
temperature. Read the total and sensible cooling
capacities.
NOTE: Interpolation is permissible, extrapolation is
not.
For example:
Enter the 50KQL12 performance table at design
water flow and water temperature. Read total
cooling, sensible cooling and heat of rejection
capacities:
Total Cooling . . . . . . . . . . . . . . . . . .12,200 Btuh
Sensible Cooling . . . . . . . . . . . . . . . . 8,900 Btuh
Heat of Rejection . . . . . . . . . . . . . . .15,900 Btuh
NOTE: It is quite normal for water source heat
pumps to be selected on cooling capacity only since
the heating output is usually greater than the cooling
capacity. Heating capacity is selected based on
different entering water conditions than cooling
capacity.
IV Determine the correction factors associated
with the variable factors of dry bulb and wet
bulb using the Correction Factors tables
found in this book.
Using the following formulas to determine the cor-
rection factors of dry bulb and wet bulb:
a) Corrected Total Cooling = tabulated total cooling
x wet bulb correction x airflow correction.
b) Corrected Sensible Cooling = tabulated sensible
cooling x wet/dry bulb correction x airflow
correction
V Determine entering air and airflow correction
using the Correction Factors tables found in
this book.
The nominal airflow for 50KQL12 is 350 cfm. The
design parameter is 325 cfm.
308/350 = 88% of nominal airflow
Use the 88% row in the Correction Factors —
Airflow table.
The entering air temperature wb is 66.2 F. Use the
66.2 F row in the entering air correction table.
Using the following formulas to determine the cor-
rection factors of entering air and airflow correction:
Compare the corrected capacities to the load
requirements established in Step I. If the capacities
are within 10% of the load requirements, the equip-
ment is acceptable. It is better to undersize than
oversize as undersizing improves humidity control,
reduces sound levels and extends the life of the
equipment.
VI Calculate and assess the water temperature
rise.
Calculate the water temperature rise and assess the
selection using the following calculation:
For example, using the Corrected Heat of Rejection
from the last step:
If the units selected are not within 10% of the load
calculations, review what effect changing the gpm,
water temperature and/or airflow will have on the
corrected capacities. If the desired capacity cannot
be achieved, select the next larger or smaller unit
and repeat Steps I through VI.
Table Ent Air Airflow Corrected
Corrected
Total Cooling = 12,200 x 0.983 x 0.979 = 11,741
Corrected
Sensible Cooling = 8,900 x 1.036 x 0.936 = 8,630
Corrected
Heat of Rejection = 15,900 x 0.985 x 0.979 = 15,333
Actual Temperature
Rise =Correction Heat of Rejection
gpm x 500
Actual Temperature
Rise =15,333 = 9.9 F
3.1 x 500
Selection procedure (with 50KQL12 example)

15
VII ARI/ISO 13256-1 Conversion
Performance standard ARI/ISO 13256-1 became
effective on January 1, 2000 and replaced the exist-
ing ARI Standards 320 Water-Loop Heat Pumps
(WLHP), 325 Ground-Water Heat Pumps (GWHP),
and 330 Ground-Loop Heat Pumps (GLHP).
The ARI/ISO Standard incorporates a consistent
rating methodology for including fan and pump
energy for calculating cooling capacity, heating
capacity, and energy efficiency ratios (EER). This
simplifies the use of rating data for heat pump per-
formance modeling in seasonal energy analysis cal-
culations, and allows for direct rating comparisons
across applications.
a) ISO Capacity and Efficiency Equations
The following equations are used to calculate and
correct cooling capacity, heating capacity, and
respective EER:
ISO cooling capacity = (cooling capacity in Btuh)
+ (fan power correction in watts x 3.412)
ISO cooling EER = (ISO cooling capacity in
Btuh/3.412)/(power input in watts – fan power
correction in watts + pump power correction in
watts) = watts/watts
NOTE: Do not divide ISO cooling capacity by
3.412 to obtain Btuh/watts.
ISO heating capacity = (heating capacity in Btuh)
– (fan power correction in watts x 3.412)
ISO heating EER = (ISO heating capacity in
Btuh/3.412)/(power input in watts – fan power
correction in watts + pump power correction in
watts) = watts/watts
NOTE: Do not divide ISO heating capacity by
3.412 to obtain Btuh/watts.
b) Identify the design conditions corrected for air and
water conditions.
Airflow cfm = 308 cfm
Water flow
(Based upon 10 F rise in temp) = 3.1 gpm
External static pressure = 0.0 in. wg (non-ducted
application)
Water pressure drop = 3.7 ft of head
Power input = 1,067 watts
Cooling capacity = 11,741 Btuh
c) Perform fan power correction adjustment.
Use the following formula to calculate fan power
Correction:
Fan Power
Correction = (Cfm x 0.472) x (External Static
Pressure x 249)/300 = watts
= (308 x 0.472) x (0 x 249)/300
= 0 watts
d) Perform pump power correction adjustment.
Use the following formula to calculate pump
power correction:
Pump power
correction = (gpm x 0.0631) x (pressure drop
x 2,990)/300
= watts
= (3.1 x 0.0631) x
(3.7 x 2,990)/300
= 7.2 watts
e) Perform capacity and EER calculations.
Use the following formula to calculate capacity
and EER:
ISO cooling
capacity = (cooling capacity) + (fan power
correction x 3.412)
= 11,741 + (0 x 3.412)
= 11,741 Btuh
f) Perform corrections by using the ISO equations
ISO EER = (ISO cooling capacity/3.412)/
(power input – fan power correction
+ pump power correction)
= watts/watts
NOTE: Do not divide ISO cooling capacity by
3.412 to obtain Btuh/watts.
= (11,741/3.412)/(1,067 – 0 + 7.2)
= 3.20 watts/watts x 3.412 Btuh/watts
= 10.93 Btuh/watts

16
50KQL07 — NOMINAL AIRFLOW 240 CFM
LEGEND
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
NOTES:
1. Water pressure differential at unit cannot exceed MOPD or water
valve cannot close.
2. Interpolation is permissible, extrapolation is not.
3. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.
4. All performance data is based upon the lower voltage of dual volt-
age rated units. See Correction Factors tables on page 21 for
operating conditions other than those listed above.
5. ARI/ISO 13256-1 (WLHP application) certified conditions are 86 F
EWT, 80.6 db and 66.2 F wb in cooling and 68 F EWT, 68 F db and
59 F wb in heating.
EWT
(F) GPM
WATER PRESSURE DROP (psi) COOLING — EAT 80 F DB/67 F WB HEATING — EAT 70 F
Without Motorized
Valve
With Cv = 2.9
MOPD = 125 psi TC SC SHR Input Power THR TC Input Power THA
20
1.0 1.6 1.8
Operation Not Recommended Operation Not Recommended 1.4 2.5 2.7
1.9 3.7 4.2 5.5 0.50 3.8
30
1.0 1.4 1.6 9.7 6.9 0.71 0.36 10.9 6.0 0.51 4.3
1.4 2.2 2.4 9.8 6.9 0.70 0.33 10.9 6.3 0.52 4.5
1.9 3.3 3.7 9.9 6.9 0.70 0.31 10.9 6.4 0.52 4.7
40
1.0 0.9 1.0 9.4 6.8 0.72 0.41 10.8 6.9 0.53 5.1
1.4 1.4 1.7 9.6 6.9 0.71 0.37 10.9 7.2 0.54 5.4
1.9 2.1 2.5 9.7 6.9 0.71 0.36 10.9 7.4 0.55 5.6
50
1.0 0.9 1.0 9.0 6.7 0.74 0.46 10.6 7.8 0.56 5.9
1.4 1.4 1.6 9.3 6.8 0.73 0.42 10.8 8.2 0.57 6.3
1.9 2.0 2.5 9.5 6.8 0.72 0.40 10.8 8.4 0.57 6.5
60
1.0 0.8 0.9 8.6 6.5 0.76 0.52 10.4 8.7 0.58 6.7
1.4 1.3 1.5 8.9 6.6 0.74 0.48 10.5 9.2 0.59 7.2
1.9 1.9 2.4 9.1 6.7 0.74 0.46 10.6 9.4 0.60 7.4
70*
1.0 0.7 0.9 8.1 6.3 0.78 0.58 10.1 9.6 0.61 7.6
1.4 1.2 1.4 8.5 6.5 0.76 0.53 10.3 10.2 0.62 8.1
1.9 1.8 2.2 8.6 6.5 0.76 0.51 10.4 10.5 0.63 8.3
80
1.0 0.7 0.8 7.6 6.1 0.79 0.65 9.8 10.6 0.63 8.4
1.4 1.1 1.3 8.0 6.2 0.78 0.60 10.0 11.1 0.64 9.0
1.9 1.6 2.0 8.1 6.3 0.78 0.57 10.1 11.5 0.65 9.3
85*
1.0 0.6 0.7 7.4 5.9 0.80 0.68 9.7 11.0 0.64 8.9
1.4 1.0 1.3 7.7 6.1 0.79 0.63 9.9 11.6 0.65 9.4
1.9 1.5 1.9 7.9 6.2 0.78 0.61 10.0 12.0 0.66 9.7
90
1.0 0.6 0.7 7.2 5.8 0.81 0.72 9.6 11.5 0.65 9.3
1.4 1.0 1.2 7.5 6.0 0.80 0.67 9.8 12.1 0.66 9.9
1.9 1.4 1.9 7.6 6.1 0.79 0.64 9.8 12.5 0.67 10.2
100
1.0 0.6 0.7 6.7 5.5 0.81 0.81 9.5
Operation Not Recommended
1.4 0.9 1.1 7.0 5.7 0.81 0.75 9.6
1.9 1.3 1.7 7.2 5.8 0.81 0.72 9.6
110
1.0 0.5 0.7 6.4 5.2 0.81 0.91 9.5
1.4 0.9 1.1 6.6 5.4 0.81 0.84 9.5
1.9 1.3 1.7 6.7 5.5 0.81 0.81 9.5
ARI — Air Conditioning and Refrigeration Institute
Cv — Coefficient of Velocity
DB — Dry Bulb
EAT — Entering Air Temperature (F)
EWT — Entering Water Temperature (F)
GPM — Gallons per Minute
MBtuh — Btuh in Thousands
MOPD — Maximum Operating Pressure Differential
SC — Sensible Capacity (MBtuh)
SHR — Sensible Heat Ratio
TC — Total Capacity (MBtuh)
THA — Total Heat of Absorption (MBtuh)
THR — Total Heat of Rejection (MBtuh)
WB — Wet Bulb
WLHP — Water Loop Heat Pump
Performance data

17
50KQL09 — NOMINAL AIRFLOW 300 CFM
LEGEND
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
NOTES:
1. Water pressure differential at unit cannot exceed MOPD or water
valve cannot close.
2. Interpolation is permissible, extrapolation is not.
3. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.
4. All performance data is based upon the lower voltage of dual volt-
age rated units. See Correction Factors tables on page 21 for
operating conditions other than those listed above.
5. ARI/ISO 13256-1 (WLHP application) certified conditions are 86 F
EWT, 80.6 db and 66.2 F wb in cooling and 68 F EWT, 68 F db and
59 F wb in heating.
EWT
(F) GPM
WATER PRESSURE DROP (psi) COOLING — EAT 80 F DB/67 F WB HEATING — EAT 70 F
Without Motorized
Valve
With Cv = 2.9
MOPD = 125 psi TC SC SHR Input Power THR TC Input Power THA
20
1.3 2.2 2.4
Operation Not Recommended Operation Not Recommended 1.9 3.9 4.4
2.5 6.2 7.0 7.2 0.63 5.1
30
1.3 1.8 2.0 11.3 7.6 0.67 0.48 13.0 7.5 0.66 5.2
1.9 3.2 3.6 11.7 7.7 0.66 0.44 13.2 7.6 0.67 5.4
2.5 5.0 5.8 11.9 7.8 0.66 0.42 13.3 7.7 0.67 5.4
40
1.3 1.3 1.5 10.9 7.4 0.68 0.54 12.8 8.1 0.69 5.8
1.9 2.6 3.0 11.2 7.5 0.67 0.49 12.9 8.4 0.70 6.0
2.5 4.0 4.7 11.3 7.6 0.67 0.47 13.0 8.6 0.71 6.2
50
1.3 1.3 1.5 10.6 7.2 0.68 0.60 12.6 9.1 0.72 6.6
1.9 2.5 2.9 10.8 7.3 0.68 0.56 12.7 9.4 0.73 6.9
2.5 3.9 4.6 10.9 7.4 0.67 0.53 12.8 9.7 0.74 7.1
60
1.3 1.2 1.4 10.2 7.1 0.69 0.67 12.5 10.1 0.75 7.6
1.9 2.4 2.8 10.4 7.2 0.69 0.62 12.6 10.6 0.77 8.0
2.5 3.7 4.4 10.6 7.2 0.68 0.60 12.6 10.9 0.77 8.2
70*
1.3 1.2 1.3 9.8 6.9 0.71 0.75 12.4 11.3 0.79 8.6
1.9 2.2 2.7 10.1 7.0 0.70 0.70 12.5 11.9 0.80 9.1
2.5 3.5 4.2 10.2 7.1 0.69 0.67 12.5 12.2 0.81 9.4
80
1.3 1.1 1.3 9.3 6.8 0.73 0.83 12.1 12.5 0.82 9.7
1.9 2.1 2.5 9.6 6.9 0.71 0.78 12.3 13.1 0.83 10.3
2.5 3.2 4.0 9.8 6.9 0.71 0.75 12.4 13.5 0.84 10.6
85*
1.3 1.1 1.2 9.0 6.7 0.74 0.87 12.0 13.1 0.83 10.2
1.9 2.0 2.4 9.4 6.8 0.72 0.82 12.2 13.7 0.85 10.8
2.5 3.1 3.9 9.6 6.9 0.72 0.79 12.3 14.1 0.86 11.2
90
1.3 1.0 1.2 8.7 6.5 0.75 0.92 11.8 13.7 0.85 10.8
1.9 2.0 2.4 9.1 6.7 0.74 0.86 12.0 14.3 0.87 11.4
2.5 3.0 3.8 9.3 6.8 0.73 0.83 12.1 14.7 0.88 11.7
100
1.3 1.0 1.2 7.9 6.2 0.79 1.01 11.3
Operation Not Recommended
1.9 1.9 2.3 8.4 6.4 0.77 0.95 11.6
2.5 3.0 3.7 8.6 6.5 0.76 0.92 11.8
110
1.3 1.0 1.2 6.9 5.7 0.83 1.10 10.7
1.9 2.0 2.4 7.5 6.0 0.80 1.04 11.1
2.5 3.1 3.8 7.8 6.2 0.79 1.02 11.3
ARI — Air Conditioning and Refrigeration Institute
Cv — Coefficient of Velocity
DB — Dry Bulb
EAT — Entering Air Temperature (F)
EWT — Entering Water Temperature (F)
GPM — Gallons per Minute
MBtuh — Btuh in Thousands
MOPD — Maximum Operating Pressure Differential
SC — Sensible Capacity (MBtuh)
SHR — Sensible Heat Ratio
TC — Total Capacity (MBtuh)
THA — Total Heat of Absorption (MBtuh)
THR — Total Heat of Rejection (MBtuh)
WB — Wet Bulb
WLHP — Water Loop Heat Pump

18
50KQL12 — NOMINAL AIRFLOW 350 CFM
LEGEND
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
NOTES:
1. Water pressure differential at unit cannot exceed MOPD or water
valve cannot close.
2. Interpolation is permissible, extrapolation is not.
3. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.
4. All performance data is based upon the lower voltage of dual volt-
age rated units. See Correction Factors tables on page 21 for
operating conditions other than those listed above.
5. ARI/ISO 13256-1 (WLHP application) certified conditions are 86 F
EWT, 80.6 db and 66.2 F wb in cooling and 68 F EWT, 68 F db and
59 F wb in heating.
EWT
(F) GPM
WATER PRESSURE DROP (psi) COOLING — EAT 80 F DB/67 F WB HEATING — EAT 70 F
Without Motorized
Valve
With Cv = 2.9
MOPD = 125 psi TC SC SHR Input Power THR TC Input Power THA
20
1.6 2.1 6.5
Operation Not Recommended Operation Not Recommended 2.3 3.8 11.4
3.1 6.1 19.6 8.7 0.78 6.0
30
1.6 1.8 6.5 14.8 9.8 0.66 0.60 16.8 9.4 0.81 6.6
2.3 3.3 11.4 14.9 9.9 0.66 0.55 16.8 9.7 0.83 6.9
3.1 5.3 19.6 15.0 9.9 0.66 0.53 16.8 9.9 0.83 7.1
40
1.6 1.6 6.5 14.4 9.6 0.67 0.68 16.7 10.6 0.86 7.7
2.3 3.1 11.4 14.7 9.7 0.66 0.62 16.8 11.0 0.87 8.0
3.1 4.8 19.6 14.8 9.8 0.66 0.59 16.8 11.2 0.88 8.3
50
1.6 1.6 6.5 14.0 9.5 0.68 0.76 16.6 11.8 0.89 8.8
2.3 2.9 11.4 14.3 9.6 0.67 0.70 16.7 12.3 0.91 9.2
3.1 4.5 19.6 14.5 9.6 0.67 0.67 16.7 12.6 0.92 9.5
60
1.6 1.5 6.5 13.5 9.3 0.69 0.86 16.4 13.1 0.93 9.9
2.3 2.7 11.4 13.8 9.4 0.68 0.79 16.5 13.6 0.94 10.4
3.1 4.3 19.6 14.0 9.5 0.68 0.76 16.6 13.9 0.95 10.7
70*
1.6 1.4 6.5 12.9 9.1 0.71 0.97 16.2 14.3 0.96 11.0
2.3 2.6 11.4 13.3 9.2 0.69 0.90 16.3 14.9 0.97 11.6
3.1 4.1 19.6 13.5 9.3 0.69 0.86 16.4 15.2 0.98 11.9
80
1.6 1.3 6.5 12.2 8.9 0.73 1.10 15.9 15.5 0.98 12.1
2.3 2.5 11.4 12.7 9.0 0.71 1.01 16.1 16.0 0.99 12.7
3.1 3.9 19.6 12.9 9.1 0.71 0.97 16.2 16.3 1.00 12.9
85*
1.6 1.3 6.5 11.8 8.8 0.74 1.16 15.8 16.0 0.99 12.6
2.3 2.4 11.4 12.3 8.9 0.72 1.07 16.0 16.6 1.00 13.2
3.1 3.8 19.6 12.6 9.0 0.72 1.03 16.1 16.9 1.01 13.4
90
1.6 1.3 6.5 11.5 8.6 0.75 1.23 15.7 16.5 1.00 13.1
2.3 2.3 11.4 12.0 8.8 0.73 1.14 15.8 17.1 1.01 13.6
3.1 3.7 19.6 12.2 8.9 0.73 1.09 15.9 17.3 1.01 13.9
100
1.6 1.2 6.5 10.7 8.4 0.78 1.37 15.4
Operation Not Recommended
2.3 2.2 11.4 11.2 8.6 0.76 1.27 15.6
3.1 3.4 19.6 11.5 8.6 0.75 1.23 15.7
110
1.6 1.1 6.5 9.9 8.1 0.82 1.52 15.1
2.3 2.0 11.4 10.4 8.3 0.79 1.42 15.3
3.1 3.2 19.6 10.7 8.4 0.78 1.37 15.4
ARI — Air Conditioning and Refrigeration Institute
Cv — Coefficient of Velocity
DB — Dry Bulb
EAT — Entering Air Temperature (F)
EWT — Entering Water Temperature (F)
GPM — Gallons per Minute
MBtuh — Btuh in Thousands
MOPD — Maximum Operating Pressure Differential
SC — Sensible Capacity (MBtuh)
SHR — Sensible Heat Ratio
TC — Total Capacity (MBtuh)
THA — Total Heat of Absorption (MBtuh)
THR — Total Heat of Rejection (MBtuh)
WB — Wet Bulb
WLHP — Water Loop Heat Pump
Performance data (cont)

19
50KQL15 — NOMINAL AIRFLOW 400 CFM
LEGEND
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
NOTES:
1. Water pressure differential at unit cannot exceed MOPD or water
valve cannot close.
2. Interpolation is permissible, extrapolation is not.
3. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.
4. All performance data is based upon the lower voltage of dual volt-
age rated units. See Correction Factors tables on page 21 for
operating conditions other than those listed above.
5. ARI/ISO 13256-1 (WLHP application) certified conditions are 86 F
EWT, 80.6 db and 66.2 F wb in cooling and 68 F EWT, 68 F db and
59 F wb in heating.
EWT
(F) GPM
WATER PRESSURE DROP (psi) COOLING — EAT 80 F DB/67 F WB HEATING — EAT 70 F
Without Motorized
Valve
With Cv = 2.9
MOPD = 125 psi TC SC SHR Input Power THR TC Input Power THA
20
1.8 1.4 1.8
Operation Not Recommended Operation Not Recommended 2.7 3.0 3.9
3.6 4.9 6.5 9.9 0.93 6.7
30
1.8 1.2 1.6 16.5 11.2 0.67 0.68 18.8 10.4 0.95 7.2
2.7 2.6 3.4 16.6 11.1 0.67 0.62 18.7 10.7 0.96 7.4
3.6 4.2 5.7 16.6 11.0 0.67 0.60 18.6 10.9 0.97 7.6
40
1.8 1.3 1.6 16.3 11.1 0.68 0.76 18.9 11.6 0.99 8.2
2.7 2.3 3.1 16.5 11.2 0.68 0.70 18.9 12.1 1.00 8.7
3.6 3.6 5.1 16.5 11.2 0.67 0.67 18.8 12.3 1.01 8.9
50
1.8 1.2 1.6 15.8 11.0 0.70 0.85 18.7 13.1 1.03 9.6
2.7 2.2 3.1 16.2 11.1 0.69 0.78 18.8 13.7 1.05 10.1
3.6 3.5 5.0 16.3 11.1 0.68 0.75 18.9 14.0 1.05 10.4
60
1.8 1.2 1.6 15.2 10.8 0.71 0.94 18.4 14.7 1.07 11.1
2.7 2.1 3.0 15.6 10.9 0.70 0.87 18.6 15.4 1.09 11.7
3.6 3.4 4.9 15.8 11.0 0.69 0.84 18.7 15.8 1.09 12.1
70*
1.8 1.1 1.5 14.3 10.5 0.73 1.04 17.9 16.4 1.10 12.6
2.7 2.0 2.9 14.9 10.7 0.72 0.97 18.2 17.2 1.12 13.4
3.6 3.2 4.8 15.2 10.8 0.71 0.94 18.4 17.6 1.13 13.8
80
1.8 1.1 1.5 13.4 10.2 0.76 1.16 17.3 18.0 1.13 14.1
2.7 2.0 2.8 14.0 10.4 0.74 1.08 17.7 18.8 1.15 14.9
3.6 3.1 4.6 14.3 10.5 0.73 1.05 17.9 19.3 1.15 15.3
85*
1.8 1.1 1.5 12.9 10.0 0.78 1.21 17.0 18.8 1.14 14.8
2.7 1.9 2.8 13.5 10.3 0.76 1.14 17.4 19.6 1.15 15.6
3.6 3.0 4.6 13.9 10.4 0.75 1.10 17.6 20.0 1.16 16.0
90
1.8 1.0 1.4 12.3 9.9 0.80 1.27 16.7 19.5 1.15 15.5
2.7 1.9 2.7 13.0 10.1 0.78 1.20 17.1 20.2 1.16 16.3
3.6 3.0 4.5 13.4 10.2 0.76 1.16 17.3 20.6 1.16 16.6
100
1.8 1.0 1.4 11.1 9.4 0.85 1.40 15.9
Operation Not Recommended
2.7 1.8 2.7 11.9 9.7 0.82 1.32 16.4
3.6 2.9 4.4 12.2 9.8 0.80 1.28 16.6
110
1.8 1.0 1.4 9.8 8.9 0.91 1.53 15.0
2.7 1.8 2.7 10.6 9.2 0.87 1.45 15.5
3.6 2.9 4.4 11.0 9.4 0.85 1.41 15.8
ARI — Air Conditioning and Refrigeration Institute
Cv — Coefficient of Velocity
DB — Dry Bulb
EAT — Entering Air Temperature (F)
EWT — Entering Water Temperature (F)
GPM — Gallons per Minute
MBtuh — Btuh in Thousands
MOPD — Maximum Operating Pressure Differential
SC — Sensible Capacity (MBtuh)
SHR — Sensible Heat Ratio
TC — Total Capacity (MBtuh)
THA — Total Heat of Absorption (MBtuh)
THR — Total Heat of Rejection (MBtuh)
WB — Wet Bulb
WLHP — Water Loop Heat Pump

20
50KQL19 — NOMINAL AIRFLOW 460 CFM
LEGEND
*ARI 320 points (bold printing) are shown for comparison purposes
only. These are not certified data points.
NOTES:
1. Water pressure differential at unit cannot exceed MOPD or water
valve cannot close.
2. Interpolation is permissible, extrapolation is not.
3. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.
4. All performance data is based upon the lower voltage of dual volt-
age rated units. See Correction Factors tables on page 21 for
operating conditions other than those listed above.
5. ARI/ISO 13256-1 (WLHP application) certified conditions are 86 F
EWT, 80.6 db and 66.2 F wb in cooling and 68 F EWT, 68 F db and
59 F wb in heating.
EWT
(F) GPM
WATER PRESSURE DROP (psi) COOLING — EAT 80 F DB/67 F WB HEATING — EAT 70 F
Without Motorized
Valve
With Cv = 2.9
MOPD = 125 psi TC SC SHR Input Power THR TC Input Power THA
20
2.4 3.0 3.7
Operation Not Recommended Operation Not Recommended 3.6 6.0 7.5
4.8 9.7 12.5 11.2 1.05 7.6
30
2.4 2.1 2.8 20.1 13.2 0.66 0.81 22.8 12.2 1.09 8.5
3.6 4.2 5.8 20.5 13.4 0.66 0.76 23.1 12.6 1.10 8.9
4.8 6.8 9.6 20.7 13.5 0.65 0.74 23.2 12.8 1.11 9.0
40
2.4 2.0 2.7 19.4 12.9 0.66 0.90 22.5 13.8 1.14 9.9
3.6 3.8 5.4 19.8 13.1 0.66 0.84 22.7 14.3 1.16 10.3
4.8 6.2 9.0 20.0 13.2 0.66 0.82 22.8 14.5 1.17 10.6
50
2.4 2.0 2.6 18.7 12.5 0.67 1.00 22.1 15.5 1.21 11.4
3.6 3.7 5.2 19.2 12.7 0.66 0.94 22.4 16.0 1.23 11.9
4.8 6.0 8.8 19.4 12.8 0.66 0.91 22.5 16.3 1.24 12.1
60
2.4 1.9 2.5 18.0 12.1 0.67 1.11 21.8 17.2 1.27 12.8
3.6 3.5 5.1 18.5 12.4 0.67 1.04 22.0 17.8 1.30 13.4
4.8 5.8 8.5 18.7 12.5 0.67 1.01 22.1 18.1 1.31 13.6
70*
2.4 1.8 2.4 17.2 11.8 0.68 1.23 21.4 18.8 1.34 14.2
3.6 3.3 4.9 17.7 12.0 0.68 1.16 21.6 19.4 1.36 14.8
4.8 5.5 8.2 17.9 12.1 0.67 1.12 21.8 19.8 1.37 15.1
80
2.4 1.7 2.4 16.3 11.4 0.70 1.36 20.9 20.3 1.40 15.6
3.6 3.2 4.7 16.8 11.6 0.69 1.28 21.2 20.9 1.42 16.1
4.8 5.2 7.9 17.1 11.7 0.69 1.24 21.3 21.3 1.43 16.4
85*
2.4 1.6 2.3 15.8 11.2 0.71 1.43 20.7 21.0 1.42 16.2
3.6 3.1 4.6 16.4 11.4 0.70 1.35 21.0 21.6 1.44 16.7
4.8 5.0 7.8 16.7 11.5 0.69 1.31 21.1 21.9 1.46 16.9
90
2.4 1.6 2.3 15.3 11.0 0.72 1.50 20.4 21.7 1.45 16.7
3.6 3.0 4.6 15.9 11.2 0.71 1.42 20.7 22.2 1.47 17.2
4.8 4.9 7.7 16.2 11.3 0.70 1.38 20.9 22.5 1.48 17.4
100
2.4 1.6 2.2 14.1 10.5 0.75 1.65 19.8
Operation Not Recommended
3.6 2.9 4.5 14.8 10.8 0.73 1.56 20.1
4.8 4.8 7.5 15.1 10.9 0.72 1.52 20.3
110
2.4 1.6 2.3 12.8 10.0 0.78 1.81 19.0
3.6 3.0 4.5 13.6 10.3 0.76 1.72 19.4
4.8 4.9 7.6 13.9 10.5 0.75 1.68 19.6
ARI — Air Conditioning and Refrigeration Institute
Cv — Coefficient of Velocity
DB — Dry Bulb
EAT — Entering Air Temperature (F)
EWT — Entering Water Temperature (F)
GPM — Gallons per Minute
MBtuh — Btuh in Thousands
MOPD — Maximum Operating Pressure Differential
SC — Sensible Capacity (MBtuh)
SHR — Sensible Heat Ratio
TC — Total Capacity (MBtuh)
THA — Total Heat of Absorption (MBtuh)
THR — Total Heat of Rejection (MBtuh)
WB — Wet Bulb
WLHP — Water Loop Heat Pump
Performance data (cont)