Carrier 50KQA, 50KQD Product Data

Product
Data

50KQA, KQD

Console Water Source Heat Pumps

1

/2 to 11/2 Nominal Tons

TM

Single-Package Console Water
Source Heat Pump with self­contained line voltage thermostats.

• Wide application use with operating
temperature range from 40 F to
100 F

• Thermostatic expansion valve
(TXV) provides efficient and reliable
refrigerant flow

• Spring 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

Copyright 2003 Carrier Corporation Form 50KQ-6PD

Features/Benefits

Carrier’s Aquazone™
console water source heat
pumps are a flexible,
attractive alternative for all
finished interior space, under
window style installations.

Operating efficiency

Carrier Aquazone water source heat
pumps (WSHP) are designed for quali­ty and performance excellence over
their lifetime. Models offer cooling
EERs (Energy Efficiency Ratio) to

12.8, and heating COPs (Coefficient

of Performance) to 4.6, which are
among the highest in the industry.

Quiet operation

The Carrier Console WSHP provides
exceptionally quiet operation for maxi­mum comfort.

Design flexibility

Aquazone™ Console WSHP units are
offered in 5 capacity sizes and in 3 dif­ferent voltages to meet individual
zone needs efficiently and effectively.
Standard and Low temperature 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 pro­tection sensing. All safety controls may
be reset at the thermostat. Each unit is
tested and run at the factory to assure
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 exchang­ers are available and should be used on
all open loop applications.

Units are ARI (Air Conditioning &
Refrigeration Institute) Standard
320-93 certified and UL (Underwrit­ers’ Laboratories) and CSA (Canadian
Standards Association) listed.

Installation ease

The unit is packaged for simple, low
cost handling, with minimal time re­quired 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 refrigerant.

Water connections are available in a
variety of configurations direct from
the factory. The standard configuration

5

is

/8 in. OD Sweat connections for
maximum flexibility in the field. Both
FPT and MPT are available as factory­installed options to improve installation
efficiency. Additionally, factory­installed 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 pow­er distribution terminal block. To fur­ther improve installation efficiency,
fused or unfused disconnect switch,
as well as a 20 amp plug and cord are
available as factory-installed options.

5

A

/8 in. ID vinyl condensate con­nection is provided for connection to
the field-installed condensate line.

Compact cabinet design dimen­sions are 10 in. deep, 48 in. wide
and 24 in. tall (with 3 in. subbase).
For flexibility, 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 holder, 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 makes access
simple.

Refrigerant circuit protection is de­signed to result in fewer service calls.
Units are equipped with easily accessi­ble service access ports on both the
suction and the discharge refrigerant
lines for on-site testing and environ­mentally 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
control (DDC) applications include the
Carrier Comfort Network (CCN) and
open protocol systems.

Carrier’s Aquazone standard unit
solid-state control system, the Com­plete C, provides control of the unit
compressor, reversing valve, fan, safety
features, and troubleshooting fault indi­cation features. The Complete C 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 the ultimate
in field installation flexibility. The
overall features of this standard control
system include:

50VA transformer —

accommodating accessory loads.

Assists in

Table of contents

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-13

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14,15

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-21

Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-24

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-31

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32-34

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-37

2

Page

NRTL/C

NERGY STA R

As an E
Carrier Corporation has deter­mined that this product meets

NERGY STA R

the E
for energy efficiency.

® Partner,

guidelines

Features/Benefits (cont)

Anti-short cycle timer —

minimum off time to prevent 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 delay in energizing 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 —

unreliable unit operation and prevents
refrigerant from leaking.

Condensate overflow sensor —

Electronic sensor mounted to the drain
pan. When condensate pan liquid
reaches an unacceptable level, the unit
is automatically deactivated and placed
in a lockout condition. The sensor
recognizes thirty continuous seconds
of overflow as a fault condition.

High and low voltage protection —

Safety protection for excessive or low
voltage conditions.

Automatic intelligent reset —

shall automatically restart 5 minutes
after shutdown if the fault has cleared.
Should a fault occur 3 times sequen­tially, lockout will occur.

Accessory output —

such as variable speed pumping, a
24 V output cycles a motorized water
valve or damper actuator with
compressor.

Performance Monitor (PM) —

Unique feature monitors water temper­atures to warn when the heat pump
is operating inefficiently or beyond
typical operating range. A field select­able switch initiates a warning code on
the unit display.

Safeguards against

Provides a

Ensures a

Unit

In applications

Water coil freeze protection
(selectable for water or anti­freeze) —

water and water/glycol solution sys­tems initiates a fault when tempera­tures exceed the selected limit for
30 continuous seconds.

Air coil freeze protection (check
filter operation) —

switch for assessing excessive filter
pressure drop initiates a fault when
temperatures exceed the selected limit
for 30 continuous seconds.

Alarm relay setting —

24 V or pilot duty dry contact provides
remote alarm activation.

Electric heat option —

vided on the controller for operating
two stages of emergency electric heat.

Service test mode with diagnostic
LED (light-emitting diode) —

mode allows service personnel to
check the operation of the WSHP and
control system efficiently. Upon enter­ing test mode, time delays speed up,
and the Status LED flashes a code
indicating the last fault. This mode
provides easy fault diagnosis; based on
the fault code the status LED flashes,
Carrier provided troubleshooting tables
provide easy reference to typical
problems.

LED visual output —

indicates high pressure, low pressure,
low voltage, high voltage, air/water
freeze protection, condensate over­flow, and control status.

Field selectable switch for

Field selectable

Selectable

Output pro-

An LED panel

Carrier PremierLink™ control­ler adds reliability, efficiency,
and simplification

The PremierLink direct digital control­ler can be ordered as a factory-installed
option. Designed and manufactured

Tes t

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, cooling

stages, outdoor-air temperature,

leaving-air temperature, leaving water

temperature, alarm status, and alarm

lockout condition.

This controller has 38.4K baud
communications capability and is com­patible with ComfortLink™ Controls,
CCN and ComfortVIEW™ Software.
The Scrolling Marquee and Navigator
are optional tools used for program­ming and monitoring the unit for opti­mal performance. Adding the Carrier
CO

sensor in the conditioned space

2

provides ASHRAE 62-99 compliance
and Demand Control Ventilation
(DCV). A DCV control strategy is espe­cially beneficial for a water source heat
pump system to minimize the energy
used to condition ventilation air. In
combination with energy efficient
Aquazone units, DCV may be the most
energy efficient approach ever devel­oped for a water source heat pump
system.

The PremierLink peer-to-peer,
Internet ready communicating control
is designed specifically for Constant
Volume and Variable Volume Tempera­ture applications. This comprehensive
controls system allows water source
heat pumps to be linked together, cre­ating a fully functional HVAC (heating,
ventilation, and air conditioning) auto­mation system.

3

Model number nomenclature

50 KQA 007 L C F 3 0 1 A A

50 – Carrier Prefix

Series
KQA – Standard Temperature Range (60 to 95 F)
KQD – Low Temperature Range (40 to 110 F)

Size – Tons
007 – 1/2
009 – 3/4
012 – 1
015 – 1-1/4
019 – 1-1/2

Water Connections/Valve Options*

No Valve Options L R
Standard Water Control Valve† AJ
High MOPD Water Control Valve** B K
Autoflow Regulator Sized for 2.5 GPM per Ton C M
Autoflow Regulator Sized for 3.0 GPM per Ton D N
Standard Control Valve with 2.5 GPM/Ton Regulator E P
Standard Control Valve with 3.0 GPM/Ton Regulator F Q
High MOPD Control Valve with 2.5 GPM/Ton Regulator G S
High MOPD Control Valve with 3.0 GPM/Ton Regulator H T

Controls
A – Manual Changeover with Complete C Microprocessor Board
B – Manual Changeover with Deluxe D Microprocessor Board
C – Automatic Changeover with Complete C Microprocessor Board
D – Automatic Changeover with Deluxe D Microprocessor Board
P – PremierLink™ DDC Control††
R – Remote Thermostat with Complete C
S – Remote Thermostat with Deluxe D

Heat Exchanger

Connection Copper Cupronickel
1/2″ Female Pipe Thread F G
1/2″ Sweat S (Std) T
1/2″ Male Pipe Thread M N

Connection Side

Left Right

Cabinet & Subbase Options

Option Cabinet Subbase

A Bottom Return 3″ Subbase
B Bottom Return 3″ Subbase w/Motorized Damper
C Bottom Return 5″ Subbase w/Motorized Damper
D Bottom Return No Subbase
E Bottom Return, Control Door Lock 3″ Subbase
F Bottom Return, Control Door Lock 3″ Subbase w/Motorized Damper
G Bottom Return, Control Door Lock 5″ Subbase w/Motorized Damper
H Bottom Return, Control Door Lock No Subbase
J Front Return No Subbase
K Front Return, Control Door Lock No Subbase
L No Cabinet 3″ Subbase
M No Cabinet 3″ Subbase w/Motorized Damper
N No Cabinet 5″ Subbase w/Motorized Damper
P No Cabinet No Subbase
Q No Cabinet 5″ Subbase
R Bottom Return 5″ Subbase
S Bottom Return, Control Door Lock 5″ Subbase

Power Connection
A – Field Connected, Hard Wire
B – 20A Plug
D – Disconnect Switch & 15A Fuse
F – Disconnect Switch, Non-Fused
H – 20A Plug, Cord Receptacle, Disconnect Switch, 15A Fuse
K – 20A Plug, Cord Receptacle, Disconnect Switch, No Fuse

Packaging
1 – Domestic

Revision Code
0 – Current Revision – Water Circuit Options

Voltage
1 – 115V/1 Ph/60 Hz***
3 – 208/230V/1 Ph/ 60 Hz
4 – 265V/1 Ph/60 Hz†††

LEGEND

Cv —
MOPD —

Coefficient of Velocity
Maximum Operating Pressure Differential

*Determined by looking at the unit from the front.
†Cv of 3.5 and MOPD of 20 psi.
**Cv of 2.5 and MOPD of 50 psi.
††Available with Complete C only.

***Sizes 007, 009, and 012 only.

†††20A plug and cord are not available in 265V units.

ARI* capacity ratings

UNIT 50KQ

007
009
012
015
019

TC TSC THR kW EER TC THA kW COP

6,800 5,032 8,500 0.531 12.8 8,600 6,958 0.548 4.6 280 1.7 2.3

9,000 6,667 11,500 0.744 12.1 11,600 9,215 0.791 4.3 280 2.3 4.2
11,800 8,160 15,000 0.922 12.8 14,000 10,797 1.052 3.9 375 3.0 9.4
15,000 10,959 19,000 1.200 12.5 17,100 13,395 1.222 4.1 400 3.8 3.0
17,600 12,361 22,500 1.467 12.0 21,000 16,058 1.620 3.8 430 4.5 4.2

LEGEND

CFM —
COP —
db —
EER —
GPM —
kW —
TC —
THA —
THR —
TSC —
wb —

Cubic Feet Per Minute
Coefficient of Performance
Dry Bulb Temperature
Energy Efficiency Ratio
Gallons Per Minute
Total Power Input (Kilowatt Hours)
Total Capacity (Btuh)
Total Heat of Absorption (Btuh)
Total Heat of Rejection (Btuh)
Total Sensible Capacity (Btuh)
Wet Bulb Temperature

*Air Conditioning & Refrigeration Institute.

COOLING HEATING

AIRFLOW

CFM

NOTES:

1. Ratings are in accordance with ARI Standard 320-93.

2. Cooling Standard: 80 F db, 67 F wb indoor entering air temperature,
85 F entering water and 95 F leaving water temperatures.

3. Heating Standard: 70 F db indoor entering air temperature, and 70 F
entering water temperature.

WATER

FLOW RATE

GPM

PRESSRUE

DROP

ft wg

4

Physical data

BASE UNIT 50KQA, KQD 007 009 012 015 019
NOMINAL CAPACITY (tons)

BLOWER

Motor Horsepower
Wheel Size D x W (in.) 2 each

FILTER SIZE (in.) Bottom Return

FILTER SIZE (in.) Front Return
UNIT WEIGHT (lb)

Shipping
Operating

REF. TO AIR HEAT EXCHANGER

Face Area (sq. ft)
No. of Rows Deep
Copper Tube Size O.D. (in.)
No. of Fins/in.

REFRIG. CHARGE (R-22)/CKT (oz.)

No. of Circuits

UNIT CABINET W/STAND. SUBBASE

W x H x D (in.)
WATER IN/OUT SIZE O.D. SWEAT (in.)

CONDENSATE SIZE I.D. VINYL (in.)

1

51/4 x 61/

8 x 29

7 x 29

158
151

1.44

1

3

13
16

/

/

20

1

1

2

/

1

2

/2 x 3/

/2 x 1/

8

4

8

8

3

/

4

1

/

20

51/4 x 61/

8 x 291/2 x 3/

7 x 291/2 x 1/

162
154

1.44
2

3

/

8

13
16

1

11

1

/

15

4

8

8

51/4 x 61/

8 x 291/2 x 3/

7 x 291/2 x 1/

4

8

8

172
164

1.44
3

3

/

8

13
21

1

1

/

4

1

/

15

51/4 x 61/

8 x 291/2 x 3/

7 x 291/2 x 1/

178
168

1.81
3

3

/

8

13
23

1

11/

2

1

/

6

4

8

8

51/4 x 61/

8 x 291/2 x 3/

7 x 291/2 x 1/

183
174

1.81
3

3

/

8

13
22

1

48 x 24 x 10 48 x 24 x 10 48 x 24 x 10 48 x 24 x 10 48 x 24 x 10

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

5

/

8

4

8

8

5

Options and accessories

Factory-installed options

Cupronickel heat exchangers

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

Changeover (MCO) or Auto Changeover (ACO) thermo­stat. The temperature set point knob and push button
switches for fan speed and cool/heat mode (MCO) selec­tion are conveniently located on the top. The thermostat
senses the return-air temperature. The thermostat sends
the appropriate signal to the controller for cooling or heat­ing mode of operation.

Options R and S allow connection to a remote wall­mounted thermostat. The Complete C controller requires a
heat pump thermostat. The Deluxe D controller can be
configured for heat pump or heat/cool thermostat.

Cabinet options

added security. A bottom or front return with left or right
hand configurations for ease of installation. Available with
3 or 5 in. subbase, with or without motorized damper.

Motorized fresh air damper

thermostat. Opens when LOW or HIGH fan speed selec­tions are made from the push button 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

or left hand side of the unit, for easy installation. Orienta­tion is determined by facing the unit from the front side.

Automatic flow regulators

2.5 or 3.0 gpm per ton automatic flow regulating valves
for easier install

Two-way motorized control valve

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 and high maximum operating pressure dif­ferential (MOPD) valve options are available for maximum
installation flexibility. Standard two-way valve performance
includes Cv of 3.5 and MOPD of 20 psi. High MOPD valve
performance includes Cv of 2.5 and MOPD of 50 psi.

Deluxe D control system

as the Complete C while incorporating additional flexibility
and functions to include:

Thermostat input capabilities
shutdown mode and night setback with override (NSB)
potential. Night setback from low temperature thermostat
with 2-hour override is initiated by a momentary signal
from the thermostat.

Compressor relay staging
(units with 2 compressors and 2 D controls) or in master/
slave applications.

ation.

include a unit mounted Manual

include a locking control panel for

can be provided on either the right

— Used with dual stage units

are available for higher

with the unit-mounted

include internally mounted

can be provided with

provides the same functions

— Accommodate emergency

Boilerless electric heat control system
changeover to electric heat at low loop water temperature.

Intelligent reversing valve operation
valve operation for extended life and quiet operation.

Thermostat type select (Y, O or Y, W)
work and select heat pump or heat/cool thermostats (Y, W).

Reversing valve signal select (O or B)
for heat pump O/B thermostats.

Dehumidistat input
dehumidification operation.

Multiple units on one thermostat/wall sensor
for communication for up to three heat pumps on one
thermostat.

Boilerless changeover temperature
boilerless changeover temperature set point.

Accessory relays
cations including fan and compressor cycling, digital night
setback (NSB), mechanical night setback, water valve oper­ation, and outside air damper operation.

Night low limit
either the push button switches, remote thermostat or the
energy management system, it is possible that the space
temperature could drop uncontrollably. The Night Low
Limit feature, with Deluxe D controller, helps maintain the
space temperature at a level that is the best compromise
between energy consumption and a safe space tempera­ture. A thermostat located near the return air filter
activates the blower and compressor operation when the
space temperature falls below 50 F. When return air tem­perature is raised above 55 F the compressor and blower
stop.

Override function
units operating in occupied/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

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.

— Provides operation of fan control for

— Allow configuration for multiple appli-

— If the unit operation is turned OFF from

— An Override function is available for

is compatible with the Carrier

— Allows automatic

— Minimizes reversing

— Provides ability to

— Provides selection

— Provides

— Provides selection of

6

50KQA,KQD CONTROL OPTIONS TABLE

OPTION CONTROLLER THERMOSTAT FUNCTIONS TRANSFORMER

A
B
C
D
P
R
S

LEGEND

Auto Changeover

ACO —
MCO —

Manual Changeover

Complete C MCO — 50 VA

Deluxe D MCO NIGHT LOW LIMIT 2-HR OVERRIDE 75 VA

Complete C ACO — 50 VA

Deluxe D ACO NIGHT LOW LIMIT 2-HR OVERRIDE 75 VA

Complete C with PremierLink™ LINKAGE DDC SYSTEM 50 VA

Complete C REMOTE — 50 VA

Deluxe D REMOTE NIGHT LOW LIMIT2-HR OVERRIDE 75 VA

Field-installed accessories

Carrier’s line of Aquazone™ thermostats (used with
remote thermostat units)

functional, accommodating stand-alone water source heat
pump installations.

Programmable 7-day thermostat
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, temperature display in degrees F or C.

Programmable 7-day light-activated thermostat
same features as the 7-day programmable thermostat and
includes occupied comfort settings with lights on, unoccu­pied energy savings with lights off.

Programmable 7-day flush-mount thermostat
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 termi­nal, and optional wall or duct-mounted remote sensor.

Programmable 5-day thermostat
2-stage cool, auto changeover, 5-minute built-in compres­sor 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 adjust­able deadband, configurable display, self-prompting pro­gram, 4 settings per day.

Non-programmable thermostat
2 cool stages, auto changeover, 5-minute built in compres­sor protection, locking cover included, temperature display
in degrees F or C, keypad lockout, large display, back-lit
display, O or B terminal, dual set point with adjustable
deadband, backplate with terminals.

Aquazone system control panel

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, boil­ers, and system pumps.

• 50RLP model nomenclature is used to customize the
panel to control all WSHP system requirements.

• Panel can be ordered to include 2, 4, 6, or 8 stages of
system heat rejection.

• Panel can be ordered to include 2, 4, 6, or 8 stages of
system heat addition.

are both attractive and multi-

— Offers 2-stage heat,

— Offers

— Offers

— Offers 2-stage heat,

— Offers 2 heat stages,

includes a pre-

• 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.

• 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 Control compatible using the Carrier
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 (

Ball valves (brass body)

1

/2, 3/4, 1, 11/4, 11/2 in.).

used for shutoff and balancing
water flow. Available with memory, memory stop, and
pressure temperature ports. UL-listed brass body, ball and
stem type with Teflon seats and seals. Five sizes are avail-

1

able (

/2, 3/4, 1, 11/4, 11/2 in.).

Y strainers (bronze body)

are “Y” type strainers with a
brass cap. Maximum operating pressure rating of
450 psi. Strainer screen made of stainless steel. Available
with blow down valves. Five sizes are available (

1

/4, 11/2 in.).

1

Solenoid valves (brass body)

offer 3.5 watt coil,

1

/2, 3/4, 1,

24 volt, 50/60 Hz, 740 amps inrush, .312 amps holding.
Slow operation for quiet system application. Five sizes are
available (

Hose kit assemblies

1

/2, 3/4, 1, 11/4, 11/2 in.).

provide all the necessary compo­nents 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 automatic balanc­ing valve (gpm) with two P/T ports, flexible stainless steel
hose with a swivel and nipple, balancing valve, and low­pressure 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 set­point adjustment), communicating room sensors, CO

sen-

2

sors (for use in demand control ventilation), and linkage
thermostats (to control multiple units from one thermostat).

7

Options and accessories (cont)

CARRIER AQUAZONE™ THERMOSTATS

(FOR USE WITH REMOTE THERMOSTAT UNITS)

Carrier

®

Pm

AUTO

7-DAY PROGRAMMABLE/LIGHT-ACTIVATED

PROGRAMMABLE

COOL

HEAT

R

COOL

AUTO

HEAT

7-DAY PROGRAMMABLE FLUSH MOUNT

5-DAY PROGRAMMABLE/NON-PROGRAMMABLE

PREMIERLINK™ COMMUNICATING CONTROL

8

Base unit dimensions

50KQA,KQD BOTTOM RETURN CABINET DIMENSIONS — RIGHT HAND PIPING

9.5

(241)

AIR INLET AREA

(1219)

FRONT VIEW

Control Access Door

48

48

(1219)

16

(406)

8

(203)

5

(127)

Air

Inlet

1.5

(38)

Discharge

Air

30°

9.5

(241)

10

(254)

R.H. Pipe &

Electric Area

0.75
(19)

1.5

(38)

(610)

24

3

(76)

1(25)

1 (25)

4.5

(114)

REAR

ACCESS

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

20

(508)

REAR VIEW

1.63
(41)

DAMPER OPENING*

48

(1219)

11.75
(298)

3.5

0.81

(21)

9.75

(248)

(89)

*Optional 5-in. (127) sub-

base will increase damper
opening to 3.63-in. (92)

21

high and increase overall

(533)

unit height by 2 in. (51).

3

(76)

9

Base unit dimensions (cont)

50KQA,KQD BOTTOM RETURN CABINET DIMENSIONS — LEFT HAND PIPING

Control Access Door

12.5

(318)

1.5
(38)

Discharge

Air

30°

1.5

(38)

24

(610)

L.H. Pipe &
Electric Area

0.75
(19)

21

(533)

AIR INLET AREA

48

(1219)

FRONT VIEW

8

(203)

1.5

(38)

3.5

(89)

48

(1219)

REAR VIEW

Air

Inlet

20

(508)

4.5

(114)

9.5

(241)

10

(254)

9.5

(241)

1(25)

1 (25)

REAR

ACCESS

3

(76)

3

(76)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

10

1.63
(41)

DAMPER OPENING*

48

(1219)

11.75
(298)

0.81
(21)

9.75

(248)

*Optional 5-in. (127) subbase

will increase damper opening
to 3.63-in. (92) high and
increase overall unit height by
2 in. (51).

50KQA,KQD FRONT RETURN CABINET DIMENSIONS — RIGHT HAND PIPING

Air

Discharge

30°

Filter

Air

Inlet

Control Access Door

16

(406)

5

(127)

21

(533)

1.5

(38)

9.5

(241)

REAR

ACCESS

1

(25)

48

(1219)

FRONT VIEW

No damper available with front return option.

41.75

(1060)

BLOCK OFF PLATE ON

BOTTOM OF CHASSIS

48

(1219)

1 (25)

4.5

(114)

20

(508)

REAR VIEW

3.5

(89)

10

(254)

1.5

(38)

R.H. PIPE &

ELECTRIC AREA

0.75 (19)

21

(533)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

48

(1219)

11

Base unit dimensions (cont)

50KQA,KQD FRONT RETURN CABINET DIMENSIONS — LEFT HAND PIPING

1.5 (38)

L.H. PIPE &

ELECTRIC AREA

(19)

0.75

12.5

(318)

Control Access Door

48

(1219)

FRONT VIEW

1.5

(38)

21

(533)

Inlet

No damper available with front return option.

41.75

(1060)

BLOCK OFF PLATE ON

BOTTOM OF CHASSIS

3.5

(89)

48

(1219)

Air

Discharge

30°

Air

1.5

(38)

Filter

10

(254)

9.5

(241)

REAR VIEW

48

(1219)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

REAR

ACCESS

20

(508)

1 (25)

4.5

(114)

1

(25)

21

(533)

12

POWER

SUPPLY IN

1(25)

13.5

(343)

1.25

(32)

SIDE VIEW (LH)

20.5

(521)

2.125 (54)

6.5 (165)

CONDENSATE

RELIEF

3.2 (80)

9.5 (241)

0.75 (19)

3.375 (86)

30

4(182)

50KQA,KQD CHASSIS DIMENSIONS — 007, 009, 012, 015, 019

41

(1041)

°

16

(406)

WATER

OUT

WATER

IN

3.5

(89)

BLOWER DECK

2

(51)

BLOWER ACCESS PANEL

0.75 (19)

FRONT VIEW (LH)

41

(1041)

BLOWER DECK

BLOWER ACCESS PANEL

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

0.75 (19)

WATER

2

(51)

WATER

OUT

3.5

IN

(89)

FRONT VIEW (RH)

3.375 (86)

(51)

2

30 °

(102)

4

(127)

5

16

(406)

CONDENSATE

RELIEF

1

(25)

9.5 (241)

SIDE VIEW (RH)

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

0.75 (19)

POWER

SUPPLY IN

(38)

1.5

(25)

1

(330)

20.5

(521)

13

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

13

Selection procedure (with 50KQA012 example)

I Determine the actual cooling and heating

loads at the desired dry bulb and wet bulb
conditions.

Assume cooling load at desired dry bulb 80 F and
wet bulb 66 F conditions are as follows:

Given:

Total Cooling (TC) . . . . . . . . . . . . . . .11,100 Btuh

Sensible Cooling (SC) . . . . . . . . . . . . .7,100 Btuh

Entering-Air Temperature db . . . . . . . . . . . . 80 F

Entering-Air Temperature wb . . . . . . . . . . . . .66 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.
Unit water pressure drop should be kept as close as
possible to each other to make water balancing eas­ier. Enter the 50KQA012 Performance Data tables
and find the proper indicated water flow and water
temperature.

For example:

Entering Water Temp . . . . . . . . . . . . . . . . . 90 F

Water Flow (Based upon

12 F rise in temp) . . . . . . . . . . . . . . . . . 3.0 GPM

Airflow Cfm . . . . . . . . . . . . . . . . . . . . . 325 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 50KQA012 Performance Table at design

water flow and water temperature. Read Total
Cooling, Sensible Cooling and Heat of Rejection
capacities:

Total Cooling . . . . . . . . . . . . . . . . . .11,500 Btuh

Sensible Cooling . . . . . . . . . . . . . . . . 7,300 Btuh

Heat of Rejection . . . . . . . . . . . . . . . 15,000 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 Corrections Factor tables
found in this book.

Using the following formulas to determine the cor­rection 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 Corrections Factor tables found in
this book.

The nominal airflow for 50KQA012 is 375 cfm.
The design parameter is 325 cfm.

325/375 = 87% of nominal airflow
Use the 87% row in the Nominal Cfm Correction

table.
The Entering Air Temperature wb is 66 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:

Table Ent Air Airflow Corrected

Corrected
Total Cooling = 11,500 x 0.994 x 0.98 = 11,202

Corrected
Sensible Cooling = 7,300 x 1.030 x 0.964 = 7,248

Corrected
Heat of Rejection = 15,000 x 0.982 x 0.978 = 14,405

Compare the corrected capacities to the load
requirements established in Step I. If the capacities
are within 10% of the load requirements, the equip­ment 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 Water temperature rise calculation and

assessment.

Calculate the water temperature rise and assess the
selection using the following calculation:

Actual Temperature
Rise

Correction of Heat Rejection

=

GPM x 500

For example, using the Corrected Heat of Rejection
from the last step:

Actual Temperature
Rise

=

3.0 x 500

14,405

=9.6 F

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.

14

VII ARI/ISO/ASHRAE 13256-1 Conversion

Performance standard ARI/ISO/ASHRAE 13256-1
became effective on January 1, 2000 and replaced
the existing 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 per­formance modeling in seasonal energy analysis cal­culations, 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.
Refer to English to SI conversion table in this

book.

b) Identify the design conditions corrected for air and

water conditions.
Airflow Cfm = 325 Cfm
Water Flow

(Based upon 12 F rise in temp) = 3.0 GPM
External Static Pressure = 0.0 in. wg (non-ducted

application)
Water Pressure Drop = 1.3 ft of head
Power input = 1,030 watts
Cooling Capacity = 11,202 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

= (325 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 x 0.0631) x

(13 x 2,990)/300

=24.5 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)

= 11,202 + (0 x 3.412)
= 11,202 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.
= (11,203/3.412)/(1,030 – 0 + 24.5)

= 3.12 Watts/Watt
= 10.62 Btuh/Watt

15

Performance data

50KQA,KQD007 (1/2 TON) — RATED AIRFLOW 280 CFM

COOLING — EAT 80

EWT F GPM

1.5 8.7 6.3 0.72 0.42 10.2

1.9 8.8 6.3 0.72 0.42 10.2 6.6 0.59 4.6 2.3 3.0 3.6

40

2.5 8.9 6.3 0.71 0.42 10.3 6.7 0.58 4.8 5.0 6.2 7.3

1.5 8.4 6.2 0.74 0.44 9.9 7.4 0.61 5.4 1.8 2.2 2.6

1.9 8.5 6.3 0.74 0.44 10.0 7.6 0.60 5.5 2.3 3.0 3.6

50

2.5 8.6 6.3 0.73 0.43 10.0 7.7 0.60 5.7 5.0 6.2 7.3

1.5 8.1 6.1 0.75 0.47 9.7 8.4 0.62 6.3 1.8 2.2 2.6

1.9 8.2 6.1 0.75 0.46 9.8 8.6 0.61 6.5 2.3 3.0 3.6

60

2.5 8.2 6.1 0.75 0.46 9.8 8.8 0.63 6.6 5.0 6.2 7.3

1.5 7.8 6.0 0.77 0.51 9.5 9.4 0.64 7.2 1.8 2.2 2.6

1.9 7.8 6.0 0.76 0.50 9.6

70*

2.5 7.9 6.0 0.76 0.49 9.6 9.8 0.65 7.6 5.0 6.2 7.3

1.5 7.4 5.8 0.78 0.56 9.3 10.4 0.67 8.2 1.8 2.2 2.6

1.9 7.5 5.9 0.78 0.55 9.4 10.7 0.66 8.4 2.3 3.0 3.6

80

2.5 7.6 5.9 0.78 0.54 9.4 10.9 0.68 8.6 5.0 6.2 7.3

1.9

85*

1.5 7.0 5.7 0.81 0.62 9.2 1.8 2.2 2.6

1.9 7.1 5.8 0.81 0.61 9.2 2.3 3.0 3.6

90

2.5 7.2 5.7 0.80 0.60 9.3 5.0 6.2 7.3

1.5 6.7 5.6 0.84 0.69 9.0 1.8 2.2 2.6

1.9 6.7 5.6 0.83 0.68 9.1 2.3 3.0 3.6

100

2.5 6.8 5.6 0.83 0.67 9.1 5.0 6.2 7.3

1.5

1.9 6.3 5.4 0.86 0.76 8.9 2.3 3.0 3.6

110

2.5 6.4 5.5 0.85 0.74 8.9 5.0 6.2 7.3

TC TSC

7.3 5.8 0.79 0.58 9.3

Sensible/

Tot al Ra tio

Operation Not Recommended

LEGEND

DB —
EWT —
GPM —
MBtuh —
TC —
THA —
THR —
TSC —
WB —
WLHP —

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

Dry Bulb
Entering Water Temperature (F)
Gallons per Minute
Btuh in Thousands
Total Capacity
Total Heat of Absorption (MBtuh)
Total Heat of Rejection (MBtuh)
Total Sensible Cooling (MBtuh)
Wet Bulb
Water Loop Heat Pump

F DB/67

F WB HEATING — EAT 70

kW THR TC kW THA

Operation Not Recommended

9.6 0.64 7.4 2.3 3.0 3.6

Operation Not Recommended

F DB PRESSURE DROP (ft wg)

Without

Motorized

Val ve

1.8 2.2 2.6

2.3 3.0 3.6

1.8 2.2 2.6

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres­sure differential at unit cannot exceed MOPD or water valve cannot
close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt­age rated units. See Performance Correction Tables on page 21
for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi­tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F
EWT, 68 F db and 59 F wb in heating.

16

50KQA,KQD009 (3/4 TON) — RATED AIRFLOW 280 CFM

COOLING — EAT 80

EWT F GPM

TC TSC

Sensible/

Tota l R a t i o

1.7 10.8 7.8 0.72 0.47 12.4

2.3 10.9 7.8 0.72 0.45 12.4 8.1 0.66 5.9 4.3 5.3 6.3

40

3.0 10.9 7.8 0.72 0.44 12.4 8.2 0.67 6.0 7.2 8.9 10.5

1.7 10.4 7.6 0.73 0.51 12.2 9.0 0.70 6.7 2.3 2.8 3.4

2.3 10.5 7.6 0.73 0.49 12.2 9.3 0.70 6.9 4.3 5.3 6.3

50

3.0 10.5 7.7 0.73 0.48 12.2 9.4 0.71 7.0 7.2 8.9 10.5

1.7 10.0 7.4 0.74 0.56 11.9 10.2 0.73 7.7 2.3 2.8 3.4

2.3 10.1 7.5 0.74 0.55 12.0 10.4 0.73 7.9 4.3 5.3 6.3

60

3.0 10.2 7.5 0.74 0.54 12.0 10.6 0.74 8.1 7.2 8.9 10.5

1.7 9.7 7.3 0.75 0.63 11.8 11.3 0.77 8.7 2.3 2.8 3.4

2.3 9.8 7.3 0.75 0.61 11.9

70*

3.0 9.8 7.4 0.75 0.60 11.9 11.9 0.79 9.2 7.2 8.9 10.5

1.7 9.3 7.2 0.77 0.69 11.7 12.6 0.82 9.8 2.3 2.8 3.4

2.3 9.4 7.2 0.76 0.67 11.7 12.9 0.82 10.1 4.3 5.3 6.3

80

3.0 9.5 7.2 0.76 0.66 11.7 13.2 0.84 10.3 7.2 8.9 10.5

2.3

85*

9.2 7.1 0.77 0.72 11.7

1.7 9.0 7.0 0.78 0.77 11.6 2.3 2.8 3.4

2.3 9.0 7.0 0.78 0.74 11.6 4.3 5.3 6.3

90

3.0 9.1 7.0 0.77 0.73 11.6 7.2 8.9 10.5

1.7 8.6 6.8 0.79 0.84 11.5 2.3 2.8 3.4

2.3 8.7 6.9 0.79 0.83 11.5 4.3 5.3 6.3

100

3.0 8.7 6.9 0.79 0.81 11.5 7.2 8.9 10.5

1.7

2.3 8.3 6.7 0.81 0.91 11.4 4.3 5.3 6.3

110

Operation Not Recommended

3.0 8.3 6.7 0.80 0.89 11.4 7.2 8.9 10.5

LEGEND

DB —
EWT —
GPM —
MBtuh —
TC —
THA —
THR —
TSC —
WB —
WLHP —

Dry Bulb
Entering Water Temperature (F)
Gallons per Minute
Btuh in Thousands
Total Capacity
Total Heat of Absorption (MBtuh)
Total Heat of Rejection (MBtuh)
Total Sensible Cooling (MBtuh)
Wet Bulb
Water Loop Heat Pump

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

F DB/67

F WB HEATING — EAT 70

kW THR TC kW THA

Operation Not Recommended

11.7 0.78 9.0 4.3 5.3 6.3

Operation Not Recommended

F DB PRESSURE DROP (ft wg)

Without

Motorized

Val ve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

2.3 2.8 3.4

4.3 5.3 6.3

2.3 2.8 3.4

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres­sure differential at unit cannot exceed MOPD or water valve cannot
close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt­age rated units. See Performance Correction Tables on page 21
for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi­tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F
EWT, 68 F db and 59 F wb in heating.

17

Performance data (cont)

50KQA,KQD012 (1 TON) — RATED AIRFLOW 375 CFM

COOLING — EAT 80

EWT F GPM

TC TSC

Sensible/

Tota l R a t i o

2.3 13.8 7.3 0.53 0.67 16.1

3.0 13.9 7.4 0.53 0.64 16.1 9.5 0.85 6.6 9.7 11.4 13.0

40

4.0 14.0 7.4 0.53 0.63 16.2 9.7 0.86 6.8 16.6 19.6 22.5

2.3 13.3 7.4 0.55 0.74 15.9 10.7 0.89 7.6 5.5 6.5 7.5

3.0 13.5 7.4 0.55 0.72 15.9 10.9 0.89 7.9 9.7 11.4 13.0

50

4.0 13.6 7.5 0.55 0.70 16.0 11.1 0.90 8.0 16.6 19.6 22.5

2.3 12.9 7.4 0.58 0.82 15.7 12.1 0.93 8.9 5.5 6.5 7.5

3.0 13.0 7.5 0.57 0.79 15.7 12.3 0.95 9.1 9.7 11.4 13.0

60

4.0 13.1 7.5 0.57 0.78 15.8 12.5 0.97 9.2 16.6 19.6 22.5

2.3 12.4 7.4 0.60 0.89 15.5 13.5 0.99 10.1 5.5 6.5 7.5

3.0 12.5 7.5 0.60 0.87 15.5

70*

4.0 12.6 7.5 0.59 0.85 15.5 14.0 1.00 10.6 16.6 19.6 22.5

2.3 11.9 7.3 0.62 0.97 15.2 14.9 1.04 11.4 5.5 6.5 7.5

3.0 12.0 7.4 0.61 0.95 15.3 15.3 1.06 11.6 9.7 11.4 13.0

80

4.0 12.1 7.4 0.61 0.93 15.3 15.5 1.06 11.9 16.6 19.6 22.5

3.0

85*

11.8 7.3 0.62 0.99 15.2

2.3 11.4 7.2 0.63 1.05 15.0 5.5 6.5 7.5

3.0 11.5 7.3 0.63 1.03 15.0 9.7 11.4 13.0

90

4.0 11.6 7.2 0.62 1.01 15.1 16.6 19.6 22.5

2.3 10.9 6.6 0.61 1.14 14.8 5.5 6.5 7.5

3.0 11.0 6.7 0.60 1.12 14.8 9.7 11.4 13.0

100

4.0 11.1 6.7 0.60 1.10 14.8 16.6 19.6 22.5

2.3

3.0 10.5 6.0 0.57 1.20 14.6 9.7 11.4 13.0

110

Operation Not Recommended

4.0 10.6 6.0 0.57 1.19 14.6 16.6 19.6 22.5

LEGEND

DB —
EWT —
GPM —
MBtuh —
TC —
THA —
THR —
TSC —
WB —
WLHP —

Dry Bulb
Entering Water Temperature (F)
Gallons per Minute
Btuh in Thousands
Total Capacity
Total Heat of Absorption (MBtuh)
Total Heat of Rejection (MBtuh)
Total Sensible Cooling (MBtuh)
Wet Bulb
Water Loop Heat Pump

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

F DB/67

F WB HEATING — EAT 70

kW THR TC kW THA

Operation Not Recommended

13.8 1.01 10.3 9.7 11.4 13.0

Operation Not Recommended

F DB PRESSURE DROP (ft wg)

Without

Motorized

Val ve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

5.5 6.5 7.5

9.7 11.4 13.0

5.5 6.5 7.5

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres­sure differential at unit cannot exceed MOPD or water valve cannot
close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt­age rated units. See Performance Correction Tables on page 21
for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi­tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F
EWT, 68 F db and 59 F wb in heating.

18

50KQA,KQD015 (11/4 TON) — RATED AIRFLOW 400 CFM

COOLING — EAT 80

EWT F GPM

TC TSC

Sensible/

Tota l Rat io

2.7 16.6 10.8 0.65 0.84 19.4

3.7 16.8 10.9 0.65 0.80 19.5 11.8 1.15 7.8 3.0 5.6 8.1

40

4.9 16.9 11.0 0.65 0.76 19.5 12.0 1.13 8.1 5.0 9.5 13.9

2.7 16.1 10.6 0.66 0.92 19.2 13.2 1.18 9.2 1.5 2.9 4.2

3.7 16.3 10.7 0.66 0.87 19.3 13.6 1.17 9.6 3.0 5.6 8.1

50

4.9 16.5 10.8 0.66 0.84 19.4 13.8 1.19 9.8 5.0 9.5 13.9

2.7 15.6 10.4 0.67 0.95 18.9 15.1 1.23 10.9 1.5 2.9 4.2

3.7 15.8 10.5 0.66 0.91 18.9 15.5 1.26 11.2 3.0 5.6 8.1

60

4.9 16.0 10.6 0.66 0.89 19.0 15.6 1.23 11.4 5.0 9.5 13.9

2.7 15.1 10.2 0.67 1.08 18.8 17.0 1.24 12.7 1.5 2.9 4.2

3.7 15.3 10.3 0.67 1.03 18.8

70*

4.9 15.5 10.3 0.67 1.01 18.9 17.8 1.31 13.4 5.0 9.5 13.9

2.7 14.5 10.0 0.69 1.18 18.6 18.7 1.34 14.2 1.5 2.9 4.2

3.7 14.8 10.0 0.68 1.14 18.7 19.3 1.34 14.7 3.0 5.6 8.1

80

4.9 14.9 10.1 0.68 1.11 18.7 19.6 1.37 15.0 5.0 9.5 13.9

3.7

85*

14.5 9.0 0.62 1.13 18.4

2.7 13.6 8.4 0.62 1.25 17.9 1.5 2.9 4.2

3.7 13.8 8.5 0.61 1.21 18.0 3.0 5.6 8.1

90

4.9 14.0 8.5 0.61 1.19 18.1 5.0 9.5 13.9

2.7 12.8 7.8 0.61 1.39 17.5 1.5 2.9 4.2

3.7 13.0 7.9 0.61 1.35 17.6 3.0 5.6 8.1

100

4.9 13.1 7.9 0.61 1.32 17.6 5.0 9.5 13.9

2.7

3.7 12.1 7.3 0.60 1.48 17.1 3.0 5.6 8.1

110

Operation Not Recommended

4.9 12.2 7.3 0.60 1.45 17.2 5.0 9.5 13.9

LEGEND

DB —
EWT —
GPM —
MBtuh —
TC —
THA —
THR —
TSC —
WB —
WLHP —

Dry Bulb
Entering Water Temperature (F)
Gallons per Minute
Btuh in Thousands
Total Capacity
Total Heat of Absorption (MBtuh)
Total Heat of Rejection (MBtuh)
Total Sensible Cooling (MBtuh)
Wet Bulb
Water Loop Heat Pump

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

F DB/67

F WB HEATING — EAT 70

kW THR TC kW THA

Operation Not Recommended

17.5 1.28 13.1 3.0 5.6 8.1

Operation Not Recommended

F DB PRESSURE DROP (ft wg)

Without

Motorized

Val ve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

1.5 2.9 4.2

3.0 5.6 8.1

1.5 2.9 4.2

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres­sure differential at unit cannot exceed MOPD or water valve cannot
close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt­age rated units. See Performance Correction Tables on page 21
for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi­tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F
EWT, 68 F db and 59 F wb in heating.

19

Performance data (cont)

50KQA,KQD019 (11/2 TON) — RATED AIRFLOW 430 CFM

COOLING — EAT 80

EWT F

GPM

TC TSC

Sensible/

Tota l Rat io

3.5 19.4 12.0 0.62 0.99 22.8

4.5 19.6 12.1 0.62 0.96 22.9 15.3 1.40 10.5 4.2 8.0 11.7

40

6.0 19.8 12.2 0.62 0.92 22.9 15.6 1.43 10.7 8.3 15.1 21.6

3.5 18.9 11.7 0.62 1.09 22.6 17.0 1.46 12.0 2.6 4.9 7.1

4.5 19.0 11.8 0.62 1.05 22.6 17.4 1.50 12.3 4.2 8.0 11.7

50

6.0 19.2 11.9 0.62 1.03 22.7 17.7 1.53 12.5 8.3 15.1 21.6

3.5 18.3 11.4 0.63 1.19 22.3 19.1 1.56 13.8 2.6 4.9 7.1

4.5 18.4 11.5 0.62 1.16 22.4 19.6 1.59 14.1 4.2 8.0 11.7

60

6.0 18.6 11.6 0.62 1.13 22.5 20.0 1.63 14.4 8.3 15.1 21.6

3.5 17.6 11.2 0.64 1.30 22.1 21.3 1.65 15.7 2.6 4.9 7.1

4.5 17.8 11.3 0.63 1.27 22.1

70*

6.0 17.9 11.3 0.63 1.25 22.2 22.1 1.70 16.3 8.3 15.1 21.6

3.5 17.4 10.9 0.63 1.45 22.3 23.6 1.77 17.6 2.6 4.9 7.1

4.5 17.6 11.0 0.63 1.42 22.4 24.2 1.77 18.2 4.2 8.0 11.7

80

6.0 17.7 11.1 0.63 1.39 22.5 24.7 1.81 18.6 8.3 15.1 21.6

4.5

85*

17.5 10.9 0.62 1.49 22.6

3.5 16.3 10.6 0.65 1.52 21.5 2.6 4.9 7.1

4.5 16.5 10.7 0.65 1.50 21.6 4.2 8.0 11.7

90

6.0 16.6 10.7 0.65 1.47 21.6 8.3 15.1 21.6

3.5 15.6 10.3 0.66 1.66 21.3 2.6 4.9 7.1

4.5 15.8 10.4 0.66 1.62 21.3 4.2 8.0 11.7

100

6.0 15.9 10.4 0.65 1.59 21.3 8.3 15.1 21.6

3.5

4.5 15.0 10.1 0.67 1.75 21.0 4.2 8.0 11.7

110

Operation Not Recommended

6.0 15.2 10.1 0.67 1.72 21.0 8.3 15.1 21.6

LEGEND

DB —
EWT —
GPM —
MBtuh —
TC —
THA —
THR —
TSC —
WB —
WLHP —

Dry Bulb
Entering Water Temperature (F)
Gallons per Minute
Btuh in Thousands
Total Capacity
Total Heat of Absorption (MBtuh)
Total Heat of Rejection (MBtuh)
Total Sensible Cooling (MBtuh)
Wet Bulb
Water Loop Heat Pump

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

F DB/67

F WB HEATING — EAT 70

kW THR TC kW THA

Operation Not Recommended

21.9 1.69 16.1 4.2 8.0 11.7

Operation Not Recommended

F DB PRESSURE DROP (ft wg)

Without

Motorized

Val ve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

2.6 4.9 7.1

4.2 8.0 11.7

2.6 4.9 7.1

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres­sure differential at unit cannot exceed MOPD or water valve cannot
close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and
70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt­age rated units. See Performance Correction Tables on page 21
for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi­tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F
EWT, 68 F db and 59 F wb in heating.

20

NOMINAL CFM CORRECTIONS

SCFM

(%)

67% 0.951 0.912 0.905 0.946 0.971 1.110 0.856
73% 0.961 0.930 0.924 0.957 0.977 1.088 0.885
80% 0.971 0.947 0.943 0.968 0.982 1.066 0.914
87% 0.980 0.964 0.961 0.978 0.988 1.045 0.941
92% 0.990 0.982 0.981 0.989 0.994 1.023 0.971

100% 1.000 1.000 1.000 1.000 1.000 1.000 1.000

107% 1.011 1.019 1.021 1.012 1.006 0.976 1.031
113% 1.020 1.035 1.038 1.022 1.012 0.956 1.058

Cooling

Capacity

COOLING CORRECTIONS HEATING CORRECTIONS

Tota l

Sensible

Cooling

Capacity

Power

Input

Wat ts

Heat of

Rejection

Heating

Capacity

Powe r

Watt s

Input

Heat of

Absorption

ENTERING AIR CORRECTIONS

COOLING CORRECTIONS HEATING CORRECTIONS

Entering

Air Wet

Bulb F

61
64 0.955 0.615 0.881 1.110 1.129 1.266 * 0.948 65 1.030 1.023 0.970

66.2 0.994 0.506 0.773 1.030 1.048 1.184 * 0.982 68 1.008 1.006 0.992

67 1.000

70 1.045 * 0.585 0.852 0.884 1.118 1.312 1.052 75 0.970 0.977 1.030
73 1.090 * 0.436 0.703 0.735 0.970 1.234 1.111 80 0.940 0.953 1.060

DB —
SCFM —
WB —

*Sensible capacity equals total capacity.

Tot al

Cooling

Capacity

0.910 0.763 1.030 1.242 * * * 0.893 60 1.060 1.047 0.940

LEGEND

Dry Bulb
Standard Cubic Feet per Minute
Wet Bulb

Sensible Cooling Capacity Entering Dry Bulb

70

F DB 75

0.466 0.733

F DB 80

F DB 80.6

1.000

F DB 85

1.018 1.154 1.390

Heat of

F DB 90

NOTES:

1.

2. ARI/ISO/ASHRAE 13256-1 uses entering air conditions of Cooling

3. Discontinued Standards ARI 320, 325, and 330 used entering air

Rejection

F DB

1.000 70 1.000 1.000 1.000

indicates performance data table conditions.

Bold

— 80.6 F DB/66.2 F WB and Heating — 68 F DB/59 F WB and
high fan speed.

conditions of Cooling — 80 F DB/67 F WB and Heating — 70 F DB
(bold print).

Entering

Air Dry

Bulb F

Heating

Capacity

Heat of

Absorption

Powe r

Input

Watts

50KQA,KQD CONSOLE BLOWER PERFORMANCE 60 Hz

50KQA,KQD

007
009
012
015
019

NOTES:

1. Fan speed is field adjustable.

2. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v for 208-230 v
units.

3. All units ARI/ISO/ASHRAE 13256-1 rated on high fan speed.

4. All units are designed and rated for zero external static pressure (non-ducted) application.

RATED

CFM

280 240 280
280 240 280
375 320 375
400 350 400
430 370 430

Low Speed High Speed

SCFM

21

Application data

Aquazone™ water source heat pump products are available
in a flexible, efficient array of models, which can be used in
all types of water loop, ground water, and ground loop
type systems. Use Aquazone products to provide optimal
energy efficient solutions and adapt to the most challeng­ing design requirements.

AQUAZONE PRODUCT GUIDE

50 SERIES

50RHC,RVC

Horizontal/Vertical

50RHR,RVR

Horizontal/Vertical

50RHS,RVS

Horizontal/Vertical

50HQ,VQ

Horizontal/Vertical

50KQ

50RTG

50RWS

TYPE

SIZE (tons)

Standard

Efficiency

1

/2-5

High

Efficiency

1

/2-5

Premium

Efficiency

1

/4-6

1

Large Capacity

1

6

/2-25

Console

1

/2-11/

2

Rooftop

3-20

Water-to-Water

3-30

APPLICATION

Efficient, compact, low cost
alternative for retrofit or new
boiler/tower systems.

Efficient, adaptable unit for
new boiler/tower, ground
water, or ground loop systems.

Premium, ultra efficient unit for
new boiler/tower, ground
water, or ground loop systems

Designed to handle large
zoned areas for all
applications.

Attractive design for finished
interior, under-window
installations.

Economical solution for IAQ
problems and tempering
ventilation air.

Used to pre-heat or cool
air and can be used as a
stand-alone or supplemental
boiler/chiller in most hydronic
heating applications. Also
conditions process fluids,
lubricants and refrigerants.

Water loop system

Water loop (or boiler/tower) system applications typically
include a number of units plumbed to a common piping
system. For optimal performance, design this system be­tween 2.25 and 3 gpm per ton of cooling capacity. The
system is comprised of highly efficient packaged reverse
cycle heat pump units interconnected by a water loop. The
water circuit serves as both a sink and source for heat ab­sorption and rejection and is designed for entering water
temperatures between 60 F and 90 F. Within this temper­ature range, units can heat or cool from the same water
source. Transferring heat from warm to cold spaces in the
building, whenever they coexist, conserves energy rather
than creating new heat.

Refer to the

tem Design Guide

systems. The guide includes a practical approach for the
latest and most current design recommendations including:

• Horizontal, vertical, console, rooftop and water-to­water product applications.

• Ventilation methods and system design including energy
recovery.

• Acoustical considerations for different product types.

• Addressing IAQ issues such as condensate removal,
humidity control.

Carrier Water Source Heat Pump Sys-

for assistance designing water loop

• Air distribution design including diffuser selection/
layout and ductwork design.

• Hydronic system design including pipe sizing/layout
and boiler/tower sizing.

• Control configurations such as stand alone, DDC, DCV,
and VVT®.

• WSHP efficiency/operational cost comparison chart.

• System variations such as a system without a boiler,
variable pumping, and VAV for interior use.

Ground water systems

To use Aquazone units in ground water applications, you
should specify extended range. This will provide factory­installed coaxial coil insulation to prevent condensate from
dripping when entering water temperatures are below
60 F. In addition, the copper coaxial coil installed on the
Aquazone units may not be suitable for all water condi­tions. Refer to the Water Conditioning section for proper
coaxial coil material selection.

Surface water system —

This system is typically located
near a lake or pond. In this application, the loop can be
submerged in a series of coils beneath the water surface.
The number of coils required depends on system load and
design. This application requires minimum piping and
excavation.

Open loop system —

Use this system where ground
water is plentiful. In this application, ground water is
pumped through supply piping from the well to the build­ing. The water is then pumped back into the ground
through a discharge well as it leaves the building. An addi­tional heat exchanger is usually installed between the build­ing water piping system and the ground water piping sys­tem. This design limits piping and excavation.

Aquazone units include a standard TXV and are rated to
extremely low temperatures to self-adjust the refrigeration
circuit. Therefore, open loop systems do not require water
regulating valves. We recommend a slow opening/closing
solenoid valve to conserve water.

Ground loop systems

There are many commonly specified designs for ground
loop applications. Typical designs include vertical loops
and horizontal loops. In some applications, water is piped
from the ground or lake directly to the water source heat
pump. This system only requires piping to get the water
from the source to the unit.

NOTE: When utilizing Aquazone water source heat pumps
in ground loop systems, refer to the design considerations
in the ground water system section.

Horizontal ground loop —

quate space is available and trenching can be easily accom­plished. A series of parallel pipes are laid out in trenches 3
to 6 feet below the ground surface, and then back-filled.
Often, multiple pipes are used to maximize each trench’s
heat transfer capability. Ground conditions, heating and
cooling requirements, and system design determine piping
requirements and ground loop field size.

Use this system when ade-

22

Vertical ground loop —

Use this system in vertical bore­hole applications. This design is well suited for retrofit ap­plications when space is limited or where landscaping is al­ready complete and minimum site disruption is desired.
The vertical ground loop system contains a single loop of
pipe inserted into a hole. The hole is back-filled and grout­ed after the pipe is inserted. The completed loop is con­cealed below ground. The number of loops required de­pends on ground conditions, heating and cooling require­ments, and the depth of each hole.

Hybrid systems —

In some applications, it may be bene­ficial to incorporate a cooling tower into the ground loop
system to reduce the overall cost. A Hybrid System dis­cards excess heat into the air and increases the cooling
performance of the ground loop.

Condensate drainage

Connect the console unit condensate drain to the building
condensate drain with a flexible, non-pressure rate plastic
hose. Be sure to avoid kinks in this hose to ensure an un­obstructed flow of condensate from the unit to the drain.
The condensate hose’s horizontal run is usually too short
to pose any drainage problems, however, make sure this
line is pitched at least 1 inch for every 10 feet of run (in the
direction of the flow.) Avoid low points and unpitched
piping since dirt collects in these areas and may cause stop­page and overflow.

Installing a trap or drain in the field is not required unless
specified by local codes. The 50KQA, KQD units are
designated in a blow-thru configuration. The condensate
drain pan is located on the outlet side of the blower so that
the pressure in the drain pan is higher than the atmospher­ic pressure.

Water conditioning

In some applications, maintaining proper water quality
may require higher corrosion protection for the water-to­refrigerant heat exchanger. Water quality varies from loca­tion to location and is unique for each job. Water charac­teristics such as pH value, alkalinity, hardness, and specific
conductance are important when considering any WSHP
application. Water typically includes impurities and hard­ness that must be removed. The required treatment de­pends on the water quality as well as system type. Water
problems fall into three main categories:

1. Scale formation caused by hard water reduces the
heat transfer rate and increases the water pressure
drop through the heat exchanger. As water is heated,
minerals and salts are precipitated from a solution
and deposited on the inside surface of the pipe or
tube.

2. Corrosion is caused by absorption of gases from the
air coupled with water on exposed metal. Corrosion
is also common in salt-water areas.

3. Organic growths, such as algae, can reduce the heat
transfer rate by forming an insulating coating on the
inside tube surface. Algae can also promote corrosion
by pitting.

NOTE: In most commercial water loop applications, Aqua­zone™ WSHP units use copper water-to-refrigerant heat
exchanger. Units can also be equipped with a Cupronickel
heat exchanger for applications where water is outside the
copper heat exchanger’s standard contaminant limits.

WATER QUALITY GUIDELINES

CONDITION ACCEPTABLE LEVEL

pH

Total Hardness

Iron Oxides
Iron Bacteria

Corrosion*

Brackish

*If the concentration of these corrosives exceeds the maximum allow-

able level, then the potential for serious corrosion problems exists.

†Sulfides in the water quickly oxidize when exposed to air, requiring that

no agitation occur as the sample is taken. Unless tested immediately
at the site, the sample will require stabilization with a few drops of one
Molar zinc acetate solution, allowing accurate sulfide determination up
to 24 hours after sampling. A low pH and high alkalinity cause system
problems, even when both values are within ranges shown. The term
pH refers to the acidity, basicity, or neutrality of the water supply. Below

7.0, the water is considered to be acidic. Above 7.0, water is consid­ered to be basic. Neutral water contains a pH of 7.0.

NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in
mg/l is equivalent to ppm.

7 to 9 range for copper. Cupronickel may be
used in the 5 to 9 range.

Calcium and magnesium carbonate should not
exceed 20 grains per gallon (350 ppm).

Less than 1 ppm.
No level allowable.

Max Allowable

Ammonia,

Ammonium Hydroxide

Ammonium Chloride,

Ammonium Nitrate
Ammonium Sulfate 0.5 ppm Cu
Chlorine/Chlorides 0.5 ppm CuNi
Hydrogen Sulfide† None Allowable —

Use Cupronickel heat exchanger when
concentrations of calcium or sodium chloride
are greater than 125 ppm are present.
(Seawater is approximately 25,000 ppm.)

Level

0.5 ppm Cu

0.5 ppm Cu

Coaxial

Metal

Acoustical design

Sound power levels represent the sound that the source,
the WSHP unit, produces with no regard to attenuation be­tween the source and the space. Acoustical design goals
are necessary to provide criteria for occupied spaces.
These goals help ensure that people can be comfortable
and communicate effectively over the background noise of
the air-conditioning system and other background noise
sources.

Acoustical design goals are desirable sound pressure lev­els within a given conditioned space and are represented
by Noise Criteria (NC) curves. Noise Criteria (NC) curve
levels represent a peak over a full frequency spectrum. A
high value in a low frequency band has the same effect on
NC level as a lower value in a high frequency band. It is im­portant that sound levels be balanced over the entire spec­trum relative to the NC curve. The lower the NC criteria
curve, the more stringent the room acoustical design must
be to meet the design goals.

It is important to know how to convert the unit ratings
from sound power (Lw) to sound pressure (Lp). This con­version depends on the specifics of the installation’s acous­tical environment. Assessing an area’s acoustical design re­quires that you compare the sound pressure (Lp) with the
NC curve for the selected area.

23

Application data (cont)

Some of the factors that affect conversion of sound

power to sound pressure and consequent NC level include:

• Acoustical ceiling type

• Use of metal or flex duct

• Absorption in the occupied space

• Location in the occupied space

• Open or closed layout plan

• Use of open or ducted returns

• Orientation of unit to occupant

• Use of lined or unlined duct

OCTAVE BAND SOUND PRESSURE LEVEL (Lp)

NOISE

CRITERIA

CURVES

NC-15
NC-20
NC-25
NC-30
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65

ASSOCIATED WITH NC CURVES

OCTAVE BAND SOUND PRESSURE LEVEL (Lp)

Frequency (Hz)

63 125 250 500 1000 2000 4000 8000

49 36 26 17 17 14 12 11
52 41 33 27 22 19 17 16
54 45 38 31 27 24 22 21
58 49 41 36 31 29 28 27
61 53 45 40 36 34 33 32
64 57 50 45 41 39 38 37
67 61 54 49 46 44 43 42
71 64 58 54 51 49 48 47
74 68 63 58 56 54 53 52
77 71 67 63 61 59 58 57
80 75 71 68 66 64 63 62

WSHP sound control

Analyzing the projected sound level in the conditioned
space caused by a WSHP unit is quite involved. The key is
to have good sound power ratings (Lw) in dB on the equip­ment to determine the ductwork, ceiling and room sound
attenuation effect. We provide suggestions for console unit
sound design around the WSHP units.

Console units

With console units, the fan and compressor are located
within the space, and only the casing design attenuates the
transmission of sound sources into the space. The designer
should carefully review the manufacturer’s acoustical data
when selecting console units and use lower fan speeds to
minimize space noise.

Operating limits

Environment

This equipment is designed for indoor installation ONLY.

Power supply

A voltage variation of ± 10% of nameplate utilization volt­age is acceptable.

Starting conditions

50KQA units

The 50KQA units start and operate in an ambient temper­ature of 40 F, with entering air temperature at 40 F, with
entering water temperature at 70 F, with both air and
water at the flow rate used in the ARI Standard 320-86
rating test, for initial start-up in winter.

50KQD units

The 50KQD unit will start and operate in an ambient tem­perature of 40 F, with entering air temperature at 40 F,
with entering water temperature at 40 F, with both air and
water at the flow rates used in the ARI Standard 320-86
rating test, for initial start-up in winter.

NOTE: These are not normal or continuous operating
conditions. We assume that such a start-up is used to bring
the building space up to occupancy temperature.

AIR LIMITS

50KQA 50KQD

Cooling Heating Cooling Heating
Min. Ambient Air
Rated Ambient Air
Max. Ambient Air
Min. Entering Air
Rated Entering Air, db/wb
Max. Entering Air, db/wb

50 F 50 F 40 F 40 F
80 F 70 F 80 F 70 F

100 F 85 F 100 F 85 F

50 F 50 F 50 F 40 F

80/67 F 70 F 80/67 F 70 F

100/83 F 80 F 100/83 F 80 F

WATER LIMITS

50KQA 50KQD

Cooling Heating Cooling Heating
Min. Entering Water
Normal Entering Water
Max. Entering Water

LEGEND

Dry Bulb

db —

Wet B ulb

wb —

NOTES:

1. Minimum Air and Water conditions can only be used at ARI flow
rates.

2. Only one maximum or minimum value may be used with 50KQA
units, all other parameters must be at normal conditions. The
50KQA units may have up two values at maximum or minimum
with all other parameters at normal conditions.

60 F 60 F 40 F 40 F
85 F 70 F 85 F 70 F
95 F 90 F 110 F 90 F

Solenoid valves

In applications using variable flow pumping, solenoid
valves can be factory installed and operated from the con­trol board in the Aquazone™ WSHP unit.

Freeze protection

Applications where systems are exposed to outdoor
temperatures below freezing (32 F) must be protected from
freezing. The most common method of protecting water
systems from freezing is adding glycol concentrations into
the water. Use design care when selecting both the type
and concentrations of glycol due to the following:

• Equipment and performance may suffer with high con­centrations of glycol and other antifreeze solutions

• Loss of piping pressure may increase greatly, resulting
in higher pumping costs

• Higher mixture viscosity may cause excess corrosion
and wear on the entire system

• The water’s acidity may be greatly increased, promoting
corrosion

Glycol promotes galvanic corrosion in systems of dissimilar
metals. The result is corrosion of one metal by the other,
causing leaks.

24

Electrical data

50KQA,KQD

50KQA,KQD

FLA —
HACR —
LRA —
RLA —

RATED

VOLTAGE

115-1-60 104/126 6.2 36.2 0.50 6.9 8.5 15

007

009

012

015

019

Full Load Amps
Heating, Air Conditioning and Refrigeration
Locked Rotor Amps
Rated Load Amps

208/230-1-60 197/254 3.0 17.7 0.33 3.4 4.2 15

265-1-60 239/292 2.7 14.8 0.35 3.3 4.0 15
115-1-60 104/126 7.4 44.0 0.50 8.8 10.9 15

208/230-1-60 197/254 3.8 20.0 0.33 4.8 6.0 15

265-1-60 239/292 3.3 18.6 0.35 3.7 4.5 15
115-1-60 104/126 9.7 54.0 1.28 11.5 14.0 20

208/230-1-60 197/254 4.8 26.3 0.52 5.4 6.6 15

265-1-60 239/292 4.2 28.0 0.43 4.8 5.9 15

208/230-1-60 197/254 6.4 38.0 0.52 7.5 9.3 15

265-1-60 239/292 5.4 32.0 0.43 5.9 7.3 15

208/230-1-60 197/254 7.6 45.0 1.10 9.4 11.5 15

265-1-60 239/292 6.3 32.0 0.83 7.2 8.8 15

LEGEND

VOLTAGE

MIN/MAX

COMPRESSOR FAN

RLA LRA

MOTOR

FLA

TOTAL

UNIT

FLA

MIN

CIRCUIT

AMP

MAX

FUSE/

HACR

25

Typical wiring schematics

MANUAL CHANGEOVER WITH COMPLETE C CONTROLLER

Trans

C

R

AL1
AL2

Y
W
O
G
R
C

A

P1

>>>>>

>

L2

L1

L2 (ribbed)

L1 (plain)

Y

LEGEND

Ground

Ground

ORG

230V

Alarm
Relay

BLK

BR

Neutral on 265V Systems

2

PB
1

BRG

Test Pins

SEE
NOTE 4

JW3
FP1 Low Temp

JW2
FP2 Low Temp

JW1

SEE NOTE 6

----------

>

>

RED

CCG

Microprocessor

Control Logic

Use copper conductors only.

Refer to Disconnect

power supply connection

2A2

RED

PBS

3

3A

RED

GRY

1A

1

PBS

YEL

1B

BRN

AL —
BM —
BR —
Cap —
CO —
CR —
DM —
FP1 —
FP2 —
HP —
JW1 —
LOC —
PB —
PBS —
RVS —
Tra ns

—

UMT

—

UPM

—

WV

—

Power Supply

Refer to Data Plate

See Note 2

box for optional

Optional
Cord
Connection

24V

SEE

BLU

YEL

BRN

YEL

YEL

UMT

DM

1

2

ORG

3

RED

BRN

BRN

ORG

YEL

YEL

YEL

YEL

WV

Alarm Relay Contacts
Blower Motor
Blower Relay
Capacitor
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
Push Button Switch
Reversing Valve Solenoid
Transformer

Unit Mounted Thermostat
Unit Performance Monitor
Water Valve

H

CAP

6

C

RED

BLK

CO

BRN

YEL

BLK

BLK
BLK

SEE

NOTE 7NOTE 7

HP

LOC

FP1

FP2

RV

CO

P2

24V
DC

EH1
EH2

CR

P3

BRN

(265V)

RED
(208V)
WHT
(115V)

10

CR

BRN

Compressor
Relay

Dip Switch

Off On

G

C

SEE

NOTE 3

CC

UPM

1
2

Not Used

Status

LED

F

YEL

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

Mate-N-Lock

BLU

8

RED

42

BLK

BM

1

5A5
6A6

77A

PBS

1
2

3
4

5
6
7
8

9

10

12

Ground

PB

Cap

Compressor

S

R

C

B (HIGH)2

A (LOW)

RED

BLK

RED
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG

Not UsedNot Used

RED

Complete

C

UMT

PUSH BUTTON SWITCH ATTRIBUTES

X = CLOSED O = OPEN

TERMINALS

STOP

FAN ONLY
LOW COOL
HIGH COOL

LOW HEAT

HIGH HEAT

HP

LOC

FP1

SEE

NOTE 4
FP2

RVS

1 2345678

1A 1B 2A 3A 4A 5A 6A 7A 8A

XOOOOOOOO
XOOOOX OOO
OX XOOO XOO
OX XOOOO XO
XOOXXOXOO
XOOXXOOXX

BLOWER MOTOR WIRING

UNIT SIZE POLE A POL E B

007 5 3
009 5 3
012 5 4
015 4 3
019 4 3

NOTES:

1. Compressor and Blower Motor thermally pro­tected internally.

2. All wiring to the unit must comply with NEC and
local codes.

3. Transformer is wired to 115V (WHT) lead for
115/1/60 units, 265V (BRN) Lead for 265/1/60
units or 208V (RED) Lead for 208/1/60. For
230/1/60 switch RED and ORG Leads at L1
and insulate RED lead. Transformer is energy
limiting or may have circuit breaker.

4. FP1 Thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.

5. Typical unit-mounted thermostat wiring shown.

6. 24 V Alarm Signal shown. For Dry Alarm Con­tact, cut JW1 Jumper and Dry Contact will be
available between AL1 and AL2.

7. Transformer secondary ground via Complete C
board standoffs and screws to Control Box.
(Ground available from top two standoffs as
shown.)

CR

Transformer

PBS

26

Power Supply

Refer to Data Plate

conductors only.

Refer to Disconnect

power supply connection

RED

2A

2

PBS

RED

3A

3

GRY

RED

1A

PBS

1B

RED

GRY

RED

RED

RED

AL —
BM —
Cap —
CB —
CO —
CR —
DM —
FP1 —
FP2 —
HP —
LOC —
NLL —
OS —
PB —
PBS —
RVS —
Tran s

—

UMT

—

UPM

—

WV

—

MANUAL CHANGEOVER WITH DELUXE D CONTROLLER

Ground

Use copper

See Note 2

box for optional

Optional
Cord
Connection

1

GRY

6A

7A

GRY

ORG

UMT

3

DM

YEL

TIME CLOCK

ORG

YEL

1

YEL

YEL

CLOSED=UNOCCUPIED

OS

WHT

NLL

5A5

PBS

6

7

Alarm Relay Contacts
Blower Motor
Capacitor
Circuit Breaker
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Loss of Charge Pressure Switch
Night Low Limit Thermostat
Override Switch
Power Terminal Block
Push Button Switch
Reversing Valve Solenoid
Transformer

Unit Mounted Thermostat
Unit Performance Monitor
Water Valve

L2 (ribbed)

L1 (plain)

NOTE 7

2

ORG

BRN

WV

SEE

BRN

WHT
GRY

YEL

BRN

RED

YEL

L2

L1

Ground

P1

Y1
Y2
W1

O/W2

G

R

C

AL1

P2

AL2

R

NSB

C

ESD
OVR

H
A

P3

R
NO1
NC1

COM

NO2
NC2

COM

R

CB

YEL

1
2
3
4
5
6
7
8

ACC1
RELAY

ACC2
RELAY

LEGEND

Neutral on 265V Systems

2

PB
1

BLK

Trans

ORG

230V

BLU

C

R

ALARM

RELAY

NOTE 6

AL2 DRY

OFF ON

S1

DIP SWITCH

PACKAGE

----------

>

>

H

COM1

TEST

PINS

C

F

S

C

JW3

FP1

JW2

FP2

JW1

LP

RED

BRN

(265V)

RED
(208V)
WHT
(115V)

SEE

NOTE 3

S

R

C

COM2

SEE

JW4

1

UPM: Disable/Enable

2

Unit Stage: 2/1
T'stat: Heat Cool/Heat Pump

3

RV on B/RV on O

4

Dehumid/Normal

5

Not Used

6

Boilerless: Enable/Disable

7

Boilerless: 40°F/50°F

8

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

Mate-N-Lock

CAP

6

RED

CR

2

BLK

BRN

YEL

GRY

Microprocessor

Control Logic

SEE

Low

NOTE 4

Low

N.O.

ON

OFF

S2

DIP SWITCH

PACKAGE

BLU

8

RED

4

BLK

B (HIGH)

2

BM

A (LOW)

1

FAN ENABLE

GRY

COM

D

STATUS

FAULT

RELAY

1

ACC1

2

Functions

3
4

ACC2

5

Functions

6

H: hi fan/dehumid

7

Not Used

8

NOTES:

NO

G

Y

TEST

R

RV

1. Compressor and Blower Motor thermally protected

COM
NO

S

R

RELAY

SPEED
RELAY

HP

LOC

FP1

FP2

RV

CO

24V
DC

EH1
EH2

COMPR
RELAY

FAN

P7

P6

10

12

1
2
3
4

5
6
7
8
9

CCG

Compressor

C

BLK

RED

NC

CC

RED
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG
Not Used

BRN

YEL

Deluxe

TERMINALS

FAN ONLY
LOW COOL
HIGH COOL

LOW HEAT

HIGH HEAT

CR

PB

Cap

D

UMT

PUSH BUTTON SWITCH ATTRIBUTES

X = CLOSE D O = OPEN

1 2345678

1A 1B 2A 3A 4A 5A 6A 7A 8A

XOOOOOOOO

STOP

XOOOOX OOO
OX XOOOX OO
OX XOOOOX O
XOOXXOXOO
XOOXXOOXX

HP

LOC

SEE

FP1

NOTE 4

FP2

RVS

BLOWER MOTOR WIRING

UNIT SIZE POLE A POLE B

007 5 3

1

009 5 3
012 5 4
015 4 3

0

019 4 3

internally.

2. All wiring to the unit must comply with NEC and local
codes.

3. Transformer is wired to 115V (WHT) lead for 115/1/60
units, 265V (BRN) Lead for 265/1/60 units or 208V
(RED) Lead for 208/1/60. For 230/1/60 switch RED
and ORG Leads at L1 and insulate RED lead. Trans­former is energy limiting or may have circuit breaker.

4. FP1 Thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions, cut
JW3 jumper.

5. Typical unit-mounted thermostat wiring shown.

6. 24 V Alarm Signal shown. For Dry Alarm Contact, cut
AL2DRY (JW4) Jumper and Dry Contact will be avail­able between AL1 and AL2.

7. Transformer secondary ground via Deluxe D board
standoffs and screws to Control Box. (Ground avail­able from top two standoffs as shown.)

Ground

CR

Transformer

OS

PBS

27

Typical wiring schematics (cont)

AUTOMATIC CHANGEOVER WITH COMPLETE C CONTROLLER

L2

L1

Ground

Neutral on 265V Systems

2

PB

1

RED

H

CAP

6

C

RED

BLK

CR

F

Power Supply

Refer to Data Plate

Use copper conductors only.

See Note 2

Refer to Disconnect

box for optional

power supply connection

Ground

PB

Compressor

Cap

BLU

S

R

8

RED

42

BLK

C

CR

Transformer

AL —
BM —
BR —
Cap —
CO —
CR —
DM —
FP1 —
FP2 —
HP —
JW1 —
LOC —
PB —
PBS —
RVS —
Tr an s

UMT
UPM
WV

Optional
Cord
Connection

Trans

24V

SEE

BLU

YEL

BRN

ORG

YEL

ORG

2

RED
BRN

BRN

YEL

UMT

4

1

ORG

5

YEL

RED

PBS

3A

YEL

YEL

BRN

Alarm Relay Contacts
Blower Motor

36

3

DM

YEL

WV

Blower Relay
Capacitor
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Power Terminal Block
Push Button Switch
Reversing Valve Solenoid
Transformer

—

Unit Mounted Thermostat

—

Unit Performance Monitor

—

Water Valve

—

L2 (ribbed)

L1 (plain)

ORG

230V

C

R

Y

Y
W
O
G
R

C
AL1
AL2

A

P1

LEGEND

Ground

BLK

Alarm
Relay

BR

SEE NOTE 6

BRG

Test Pins

JW1

----------

BRN

(265V)

RED

SEE

(208V)

NOTE 3

WHT

(115V)

CCG

SEE
NOTE 4

JW3
FP1 Low Temp

JW2
FP2 Low Temp

Microprocessor

Control Logic

>

>

BRN

YEL

BLK

BLK
BLK

10

CR

BRN

CC

Compressor
Relay

Dip Switch

UPM

1
2

Not Used

Off On

Status

G

LED

C

YEL

B (HIGH)2

BM

1 A (LOW)

5A5

RED

6A6

77A

PBS

SEE
NOTE 7NOTE 7

1

HP

2
3

LOC

4
5

FP1

6
7

FP2

8
9

RV

10

12

CO

P2

24V
DC

EH1
EH2

P3

CO

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

Mate-N-Lock

Complete

C

RED

BLK

RED
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG

Not UsedNot Used

HP

LOC

FP1

SEE

NOTE 4

FP2

RVS

UMT

PUSH BUTTON SWITCH ATTRIBUTES

X = CLOSED O = OPEN

TERMINALS

FAN ONLY

LOW FAN

HIGH FAN

1A 1B 2A 3A 4A 5A 6A 7A 8A

XOOOOOOOO

STOP

XOOOOX OOO
XOOXXOXOO
XOOXXOOX X

BLOWER MOTOR WIRING

UNIT SIZE POLE A POLE B

007 5 3
009 5 3
012 5 4
015 4 3
019 4 3

PBS

1 2345678

NOTES:

1. Compressor and Blower Motor thermally pro­tected internally.

2. All wiring to the unit must comply with NEC
and local codes.

3. Transformer is wired to 115V (WHT) lead for
115/1/60 units, 265V (BRN) Lead for 265/1/60
units or 208V (RED) Lead for 208/1/60. For
230/1/60 switch RED and ORG Leads at L1
and insulate RED lead. Transformer is energy
limiting or may have circuit breaker.

4. FP1 Thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.

5. Typical unit-mounted thermostat wiring shown.

6. 24 V Alarm Signal shown. For Dry Alarm Con­tact, cut JW1 Jumper and Dry Contact will be
available between AL1 and AL2.

7. Transformer secondary ground via Complete C
board standoffs and screws to Control Box.
(Ground available from top two standoffs as
shown.)

28

Power Supply

Refer to Data Plate

conductors only.

Refer to Disconnect

box for optional

power supply connection

Optional
Cord
Connection

4

5

RED

6

PBS

3

3A

YEL

YEL

RED

GRY

RED

55A

RED

6

RED

7

AL —
BM —
Cap —
CB —
CO —
CR —
DM —
FP1 —
FP2 —
HP —
LOC —
NLL —
OS —
PB —
PBS —
RVS —
Tr an s

—

UMT

—

UPM

—

WV

—

AUTOMATIC CHANGEOVER WITH DELUXE D CONTROLLER

Ground

Use copper

See Note 2

YEL

UMT

1

ORG
YEL

3

DM

ORG

YEL

RED

TIME CLOCK

CLOSED=UNOCCUPIED

OS

WHT

NLL

GRY

PBS

6A

7A

GRY

Alarm Relay Contacts
Blower Motor
Capacitor
Circuit Breaker
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Loss of Charge Pressure Switch
Night Low Limit Thermostat
Override Switch
Power Terminal Block
Push Button Switch
Reversing Valve Solenoid
Transformer

Unit Mounted Thermostat
Unit Performance Monitor
Water Valve

ORG

NOTE 7

2

BRN

BRN

WV

SEE

YEL

GRY

RED

BRN

WHT

GRY

CB

YEL

L2

L1

L2 (ribbed)

L1 (plain)

Trans

O/W2

AL1

Y1

Y2
W1

G
R
C

P2

AL2

NSB

ESD

OVR

P3

NO1
NC1

COM

NO2
NC2

COM

Ground

P1

R

C

H
A

R

R

ORG
230V

BLU

1
2
3
4
5
6
7
8

ACC1
RELAY

ACC2

RELAY

LEGEND

Neutral on 265V Systems

BLK

C

R

RED

BRN

(265V)

RED
(208V)
WHT
(115V)

SEE

NOTE 6

AL2 DRY

OFF ON

1
2
3
4
5
6
7
8

S1

DIP SWITCH

PACKAGE

UPM: Disable/Enable
Unit Stage: 2/1
T'stat: Heat Cool/Heat Pump
RV on B/RV on O
Dehumid/Normal
Not Used
Boilerless: Enable/Disable
Boilerless: 40°F/50°F

2

PB
1

ALARM

RELAY

----------

>

>

H

CAP

C

F

YEL

GRY

SEE
NOTE 3

C

R

S

C

JW4

S

COM1

TEST

PINS

JW3
FP1

JW2

FP2

JW1

LP

COM2

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

Mate-N-Lock

6

RED

CR

2

BLK

BRN

D

Microprocessor

Control Logic

STATUS

FAULT

SEE

Low

NOTE 4

Low

N.O.

ON

OFF

1
2
3
4
5
6
7
8

S2

DIP SWITCH

PACKAGE

BLU

8

RED

4

BLK

B (HIGH)

2

BM

A (LOW)

1

GRY

TEST

RV

RELAY

ACC1
Functions

ACC2
Functions

H: hi fan/dehumid
Not Used

Compressor

S

R

C

BLK

RED

FAN ENABLE

COM

NO

COM

NO

G

Y

R

NOTES:

1. Compressor and Blower Motor thermally pro-

RELAY

HP

LOC

FP1

FP2

RV

CO

P7

24V
DC

EH1
EH2

COMPR

RELAY

P6

FAN
SPEED
RELAY

NC

1
2
3
4

5
6
7
8
9

CCG

CC

RED

RED
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG
Not Used

BRN

YEL

Deluxe

TERMINALS

CR

PB

Cap

D

UMT

PUSH BUTTON SWITCH AT TRIBUTES

X = CLOSED O = OPEN

1 2345678

1A 1B 2A 3A 4A 5A 6A 7A 8A

XOOOOOOOO

STOP

FAN ONLY

LOW FAN
HIGH FAN

XOOOOX OOO
XOOXXOXOO
XOOXXOOXX

HP

LOC

SEE

FP1

NOTE 4

FP2

RVS

BLOWER MOTOR WIRING

UNIT SIZE POLE A POLE B

007 5 3
009 5 3
012 5 4
015 4 3
019 4 3

1

0

Ground

CR

Transformer

PBS

tected internally.

2. All wiring to the unit must comply with NEC and
local codes.

3. Transformer is wired to 115V (WHT) lead for
115/1/60 units, 265V (BRN) Lead for 265/1/60
units or 208V (RED) Lead for 208/1/60. For
230/1/60 switch RED and ORG Leads at L1 and
insulate RED lead. Transformer is energy limiting
or may have circuit breaker.

4. FP1 Thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions,
cut JW3 jumper.

5. Typical unit-mounted thermostat wiring shown.

6. 24 V Alarm Signal shown. For Dry Alarm Con­tact, cut AL2DRY (JW4) Jumper and Dry Contact
will be available between AL1 and AL2.

7. Transformer secondary ground via Deluxe D
board standoffs and screws to Control Box.
(Ground available from top two standoffs as
shown.)

OS

29

Typical wiring schematics (cont)

REMOTE-MOUNTED THERMOSTAT WITH COMPLETE C CONTROLLER

Power Supply

Refer to Data Plate

Use copper conductors only.

See Note 2

Refer to Disconnect

box for optional

power supply connection

Optional
Cord
Connection

Typical Heat Pump T-stat

SEE NOTE 5

Class 1 or 2
Wiring acceptable
outside control box

Y

O
G
R
C
L

BRN

WV

24V

Ground

L2

L1

L2 (ribbed)

L1 (plain)

Trans

Class 1 Wiring
required inside
control box

Compressor

Cooling
Fan
24 V AC

Common
Alarm

SEE
NOTE 7

Ground

ORG

230V

BLU

BRN

YEL

YEL

BLK

Neutral on 265V Systems

RED

PB

12

BRN

(265V)

RED

(208V)

WHT

(115V)

YEL

DM

10 1

YEL

BR

C

R

Y

Y
W
O
G
R
C

Alarm
Relay

JW1

SEE NOTE 6

AL1
AL2

A

P1

BLK

SEE
NOTE 3

ORG

BR

BRNGRY BRN

BRG

Test Pins

SEE
NOTE 4

JW3
FP1 Low Temp

JW2
FP2 Low Temp

H

CAP

C

RED

F

BLK

COM

NO

BR

BRNYEL

CCG

Microprocessor

Control Logic

6

2

BRN

YEL

BLK

BRN

Dip Switch

Off On

C

CR

2

1

CR

Compressor
Relay

G

8

4

BM

2

FSS

0

CC

UPM

1
2

Not Used

Status

LED

BLU

RED

BLK

B (HIGH)

A (LOW)

3

1

YEL

RED

Ground

PB

Complete

RED
RED
BLU
BRN
GRY
GRY
VIO
VIO
BRN
ORG

Cap

C

(LOCATED IN COMPRESSOR COMPARTMENT)

HP

LOC

SEE

FP1

NOTE 4

FP2

RVS

BLOWER MOTOR WIRING

UNIT SIZE POLE A POLE B

007 5 3
009 5 3
012 5 4
015 4 3
019 4 3

FAN SPEED SWITCH

Compressor

S

R

C

BLK

SEE
NOTE 7

1

HP

2
3

LOC

4
5

FP1

6
7

FP2

8
9

RV

10

Not UsedNot Used

12

CO

P2

24V
DC

EH1
EH2

P3

CO

CR

BR

Transformer

1
2
3

LEGEND

AL —
BM —
BR —
Cap —
CO —
CR —
DM —
FP1 —
FP2 —
FSS —
HP —
JW1 —
LOC —
P1 —
PB —
RVS —
Tran s

UPM
WV

Alarm Relay Contacts
Blower Motor
Blower Relay
Capacitor
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
Fan Speed Switch
High-Pressure Switch
Jumper Wire for Alarm
Loss of Charge Pressure Switch
Field Wiring Terminal Block
Power Terminal Block
Reversing Valve Solenoid
Transformer

—

Unit Performance Monitor

—

Water Valve

—

30

----------

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

NOTES:

1. Compressor and Blower Motor thermally pro­tected internally.

2. All wiring to the unit must comply with NEC
and local codes.

3. Transformer is wired to 115V (WHT) lead for
115/1/60 units, 265V (BRN) Lead for 265/1/
60 units or 208V (RED) Lead for 208/1/60.
For 230/1/60 switch RED and ORG Leads at
L1 and insulate RED lead. Transformer is
energy limiting or may have circuit breaker.

4. FP1 Thermistor provides freeze protection
for WATER. When using ANTI-FREEZE solu­tions, cut JW3 jumper.

5. Typical heat pump thermostat wiring shown.
Refer to thermostat Installation Instructions
for wiring to the unit.

6. 24 V Alarm Signal shown. For Dry Alarm
Contact, cut JW1 Jumper and Dry Contact
will be available between AL1 and AL2.

7. Transformer secondary ground via Com­plete C board standoffs and screws to Con­trol Box. (Ground available from top two
standoffs as shown.)

Power Supply

Refer to Data Plate

Use copper

conductors only.

See Note 2

Refer to Disconnect

box for optional

power supply connection

Optional
Cord
Connection

BRN

Class 1 or 2
Wiring acceptable
outside control box

Y

O

G

R
C

X1

Typical Heat

Pump T-stat

SEE NOTE 5

BRN

CLOSED=UNOCCUPIED

NLL

BRN

ORG

YEL

DM

OV

OV

OVERRIDE

WITH DIGITAL T-STAT

AL —
BM —
Cap —
CB —
CO —
CR —
DM —
FP1 —
FP2 —
FSS —
HP —
LOC —
NLL —
P1 —
PB —
RVS —
Tr an s
UPM
WV

Alarm Relay Contacts
Blower Motor
Capacitor
Circuit Breaker
Condensate Overflow
Compressor Relay
Damper Motor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
Fan Speed Switch
High-Pressure Switch
Loss of Charge Pressure Switch
Night Low Limit Thermostat
Field Wiring Terminal Block
Power Terminal Block
Reversing Valve Solenoid
Transformer

—

Unit Performance Monitor

—

Water Valve

—

L2 (ribbed)

L1 (plain)

SEE

NOTE 7

Class 1 Wiring
required inside
control box

Compressor

Cooling
Fan

24 V AC
Common

Alarm

RED

TIME CLOCK

BRN

WHT

YEL

WV

YELYEL

OVERRIDE
OVERRIDE

REMOTE-MOUNTED THERMOSTAT WITH DELUXE D CONTROLLER

Ground

RED

Ground

L2

L1

P1

Y1
Y2
W1

O/W2

G
R
C

AL1

P2

AL2

R

NSB

C

ESD

OVR

H
A

P3

R
NO1
NC1

COM

NO2
NC2

COM

R

CB

YEL

1
2
3
4
5
6
7
8

ACC1
RELAY

ACC2
RELAY

LEGEND

Neutral on 265V Systems

C

R

RED

BLK

ORG

230V

SEE

NOTE 6

AL2 DRY

OFF ON

1
2
3
4
5
6
7
8

S1

DIP SWITCH

PACKAGE

Trans

ALARM

RELAY

2

PB
1

BLU

----------

H

C

F

BRN

(265V)

RED

(208V)

WHT

SEE

(115V)

NOTE 3

S

S

TEST

PINS

C

JW3
FP1

JW2

FP2

JW1
LP

COM2CRCOM1

JW4

UPM: Disable/Enable
Unit Stage: 2/1
T'stat: Heat Cool/Heat Pump
RV on B/RV on O
Dehumid/Normal
Not Used
Boilerless: Enable/Disable
Boilerless: 40°F/50°F

Field Line Voltage Wiring
Field Low-Voltage Wiring
Printed Circuit Trace
Optional Low Voltage

Wiring

Relay Contactor Coil

Solenoid Coil

Thermistor

Ground

CAP

RED

BLK

BRN

YEL

Microprocessor
Control Logic

SEE

Low

NOTE 4

Low

N.O.

OFF

DIP SWITCH

PACKAGE

6

2

ON

S2

CR

2

1

D

STATUS

FAULT

1
2
3
4
5
6
7
8

BLU

8

RED

4

BLK

B (HIGH)

BM

A (LOW)

GRY

GRY

G

TEST

R

RV

RELAY

ACC1
Functions

ACC2
Functions

H: hi fan/dehumid
Not Used

Compressor

S

R

C

BLK

RED

3

FSS

2

FAN ENABLE

RELAY

COM

NO

COM

FAN
SPEED
RELAY

NC

NO

1

HP

2
3

LOC

4
5

FP1

FP2

RV

10

CO

12

P7

24V
DC

EH1

EH2

P6

COMPR
RELAY

6
7
8
9

CCG

BRN

CC

YEL

Y

NOTES:

1. Compressor and Blower Motor thermally protected
internally.

2. All wiring to the unit must comply with NEC and local
codes.

3. Transformer is wired to 115V (WHT) lead for 115/1/60
units, 265V (BRN) Lead for 265/1/60 units or 208V
(RED) Lead for 208/1/60. For 230/1/60 switch RED
and ORG Leads at L1 and insulate RED lead. Trans­former is energy limiting or may have circuit breaker.

4. FP1 Thermistor provides freeze protection for
WATER. When using ANTI-FREEZE solutions, cut
JW3 jumper.

5. Typical heat pump thermostat wiring shown. Refer to
thermostat Installation Instructions for wiring to the
unit.

6. 24 V Alarm Signal shown. For Dry Alarm Contact, cut
AL2DRY(JW4) Jumper and Dry Contact will be avail­able between AL1 and AL2.

7. Transformer secondary ground via Deluxe D board
standoffs and screws to Control Box. (Ground avail­able from top two standoffs as shown.)

1

GRY

RED
RED
BLU
BRN
GRY

GRY
VIO
VIO

BRN

ORG

Not Used

CR

Ground

PB

Cap

SEE

NOTE 7

BLK

HP

LOC

SEE

FP1

NOTE 4

FP2

FAN SPEED SWITCH

(LOCATED IN COMPRESSOR COMPARTMENT)

RVS

1

BLOWER MOTOR WIRING

UNIT SIZE POLE A POLE B

0

007 5 3
009 5 3
012 5 4
015 4 3
019 4 3

1
2
3

CR

Transformer

Deluxe

D

31

Typical piping and wiring

LEFT HAND RIGHT HAND

5.5 (140)

3.5 (89)

STANDARD UNIT

3.5

(89)

5.5 (140)

21

(533)

3

(76)

7.13

(181)

9.5

(241)

3.5

(89)

(38)

1.5

3.5 (89)

3.16 (80)

1 (25)

Power Supply In

2 (51)

1.25
(32)

Power Supply In

Water Out Water Out

Water In

13

(330)

13

(330)

Condensate

Drain

Subbase available only on bottom return units

No condensate trap required

Water In

Condensate

Drain

(330)

.

13

13

(330)

1 (25)

1.5

(38)

2

(51)

3.5 (89)

(25)

21

(533)

1

3.5

(89)

(181)

1.5

(38)

7.13

9.5

(241)

(76)

3

Electrical wiring and water piping may enter the cabinet either:

1. From below, passing up through the 7

2. From behind, passing through the 41/2-in. (114) wide opening in the rear cabinet.

1

/8-in. (181) x 31/2-in. (89) opening in the subbase.

3. Be sure adequate room is given for any accessories like valves, disconnect switches, etc.

4. All measurements in inches. Measurements in parentheses are in millimeters.

Piping Connections Available
Female Pipe Thread

Sweat Copper Pipe (shown above)
Motorized Water Valve (see separate submittal page)
Male Pipe Thread

32

WITH MOTORIZED SHUT-OFF VALVE

LEFT HAND RIGHT HAND

5.5 (140)

3.5

(89)

3.5 (89)

5.5 (140)

21

(533)

3

(76)

7.13

(181)

9.5

(241)

3.5

(80)

1.5
(38)

3.16
(83)

1 (25)

Power Supply In

Water Out
Water In

3.5

(89)

2

(51)

13

(330)

10

(254)

1.25
(32)

Condensate

Drain

Condensate

Subbase available only on bottom return units

No condensate trap required

Power Supply In

Water Out

Water In

13

(330)

(254)

Drain

.

1 (25)

21

(533)

3.5 (89)

2

(51)

1 (25)

3.5

10

1.5

(38)

(89)

1.5
(38)

9.5

(241)

7.13

(181)

(76)

3

Electrical wiring and water piping may enter the cabinet either:

1. From below, passing up through the 7

2. From behind, passing through the 4

1

/8-in. (181) x 31/2-in. (89) opening in the subbase.

1

/2-in. (114) wide opening in the rear cabinet.

3. All measurements in inches. Measurements in parentheses are in millimeters.

4. Be sure adequate room is given for any accessories like valves, disconnect switches, etc.

33

Typical piping and wiring (cont)

WITH OPTIONAL DISCONNECT SWITCH (FUSED OR UNFUSED) AND/OR RECEPTACLE

LEFT HAND RIGHT HAND

5.5 (140)

3.5

(89)

3.5

(89)

5.5 (140)

21

(531)

7.5

(178)

7

(178)

3

(76)

4.25

(108)

7.13

181)

9.5

(241)

3.25
(83)

3.5

(89)

1.5

(38)

3.5 (89)

Fuses

Power

Supply In

3.16 (83)

1

(25)

Water In

Water Out

Receptacle

(51)

2

Disconnect
Switch

13

(330)

13

1.25
(32)

(330)

Condensate

Drain

Subbase available only on bottom return units

No condensate trap required

Water In

Water Out

Receptacle

Condensate

Drain

(330)

.

1

(25)

2 (51)

3.5 (89)

Disconnect
Switch

Fuses

Power

Supply In

13

(330)

13

(38)

1.5

(25)

1

3.5

(83)

1.5

(38)

9.5 (241)

3.25
(83)

7.13

(181)

4.25

(108)

7.5

(191)

7

(178)

(76)

21

(533)

3

Electrical wiring and water piping may enter the cabinet either:

1. From below, passing up through the 7

2. From behind, passing through the 4

3. Be sure adequate room is given for any accessories like valves, disconnect switches, etc.

1

/8-in. (181) x 31/2-in. (89) opening in the subbase.

1

/2-in. (114) wide opening in the rear cabinet.

4. All measurements in inches. Measurements in parentheses are in millimeters.

34

Guide specifications

Console Water Source Heat Pumps

HVAC Guide Specifications

Size Range:

Carrier Model Number:

Part 1 — General

1.01 SYSTEM DESCRIPTION
A. Install Water Source Heat Pumps, as indicated on

the plans with capacities and characteristics as listed
in the schedule and the specifications that follow.
Units shall be Carrier model 50KQA (standard tem­perature range 60 F to 95 F) or model 50KQD (low
temperature range 40 F to 110 F).

B. Units shall be individually packaged with wooden

skid covered with protective corner posts and plastic
stretch wrapping for maximum protection.

1.02 QUALITY ASSURANCE
A. All equipment listed in this section must be rated in

accordance with ARI and CSA. The units shall have
ARI, CSA labels.

B. All units shall be factory tested under normal operat-

ing conditions at nominal water flow rates. Units
which are tested without water flow rates are not
acceptable.

Part 2 — Product

2.01 EQUIPMENT
A. Heat Pump Assembly:

Factory-tested and assembled single-piece packaged
heating and cooling heat pump units shall be factory
wired, charged with non-CFC R-22, contain
refrigerant-to-water heat exchanger, air-to-refrigerant
heat exchanger, 4-way reversing valve, fan motor
assembly, compressor, TXV metering device, and all
internal controls and safety devices.

B. Unit Cabinet:

6,800 to 17,600 Btuh
Cooling Capacity

8,600 to 21,000 Btuh
Heating Capacity

50KQA, KQD

1. The cabinet shall be constructed of heavy gage
steel with welded corner bracing. A removable
front cabinet allows easy service access to the
chassis. The cabinet shall have a 30-degree
sloped top with an aluminum rigid bar type dis­charge grille.

2. An access door shall be provided to cover the
swing down control section. For all capacities of
the Console Heat Pump, the cabinet shall be
one size (48-in. L x 9

3. Options include a locking control panel for
added security; a bottom or front return with
left or right hand configurations for ease of
installation. Available with 3 or 5 in. subbase,
with or without motorized damper.

4. The cabinet shall be powder painted.

1

/2- in. W x 24-in. H).

C. Fan and Motor Assembly:

The fan motors shall be multi-speed permanently
lubricated, PSC (permanent split capacitor) type
with thermal overload protection. To facilitate field
service all units shall have a slide out fan deck and
quick electrical disconnect.

D. Refrigerant Components:

1. Units shall have a sealed refrigerant circuit includ­ing a hermetic compressor, a refrigerant meter­ing device, a finned tube refrigerant-to-air heat
exchanger, a reversing valve, a coaxial (tube-in­tube) refrigerant-to-water heat exchanger, and
safety controls including a high-pressure sensor, a
loss-of-charge sensor to protect against loss of
refrigerant, and low water temperature (freeze­stat) sensor.

2. Rotary compressors shall have thermal over­load protection and shall be located in an
insulated compartment to minimize sound
transmission. Units shall have the compressor
mounted on isolators to reduce noise and vibra­tion transmission.

3. Refrigerant-to-air heat exchangers shall utilize
enhanced aluminum fins and rifled copper tube
construction rated to withstand 425 psi refriger­ant working pressure.

4. Refrigerant-to-water heat exchangers shall be of
copper inner water tube and steel refrigerant
outer tube design rated to withstand 450 psi
working refrigerant pressure.

5. Reversing valve shall be four-way solenoid­activated refrigerant valves which shall fail to
heating operation. If the unit fails to cooling a
low-temperature thermostat must be provided
to prevent over-cooling of the room.

6. Optional coaxial water-to-refrigerant heat
exchangers shall be cupronickel.

E. Controls and Safeties:

Units which may be reset at the disconnect switch
only shall not be acceptable.

1. Electrical:
A control box shall be located within the unit

and shall contain controls for compressor,
reversing valve and fan motor operation.

2. Piping:
a. Copper tubes with a

shall be provided on the supply and return
water connections for the purpose of form­ing a sweat connection to field-supplied dis­tribution piping.

b. Optional threaded connections: A

male or female pipe threaded fitting shall be
factory mounted on the supply and return
water connections.

5

/8-in. OD dimension

1

/2-in.

35

Guide specifications (cont)

3. Unit Controls:
Safety devices on all units shall include low-

pressure sensor or loss-of-charge switch, high­pressure switch, low water temperature sensor,
and condensate overflow switch.

4. The standard Complete C electronic control
system shall interface with the unit mounted or
remote heat pump (Y,O) wall thermostat
(mechanical or electronic). The control system
shall have the following features:

a. 50 VA transformer.
b. Anti-short cycle time delay on compressor

operation; time delay shall be 5 minutes

minimum.
c. Random start on power-up.
d. Low voltage protection.
e. High voltage protection.
f. Condensate overflow shutdown.
g. Unit shutdown on low refrigerant pressures.
h. Unit shutdown on high or low water temper-

ature (selectable for antifreeze solutions).
i. Option to reset unit at thermostat or discon-

nect. Fault type shall be retained in memory

if reset at thermostat.
j. Automatic intelligent reset. Unit shall auto-

matically restart 5 minutes after shutdown if

the fault has cleared. Should a fault occur

3 times sequentially, then lockout will occur.
k. Ability to defeat time delays for servicing.
l. Light-emitting diode (LED) to indicate high

pressure, low pressure, improper voltage,

water coil freeze protection, air coil freeze

protection, condensate overflow, and con-

trol status.
m. Unit Performance Monitor to indicate ineffi-

cient operating conditions prior to unit

lockout.
n. Remote fault type indication at thermostat.
o. Single harness connection for all safety

devices.
p. Selectable 24-v or pilot duty dry contact

alarm output.
q. 24-v output to cycle a motorized water valve

with compressor contactor.
r. The control box components shall be

easily accessible with a swing out control

compartment.
s. Standard unit-mounted MCO (manual

changeover) thermostat operating controls

shall consist of temperature setting dial

knob, push button switches for Stop, Fan

only, Hi Cool, Lo Cool, Hi Heat, Lo Heat.

Unit-mounted thermostats shall have a

remote sensor for sensing the return-air

temperature.

5. The optional Deluxe D electronic control shall
have all the features of the Complete C control,
with the following additional features:

a. 75 VA transformer.
b. A removable thermostat connector.
c. Random start on return from night setback.
d. Minimized reversing value operation for

extended life and quiet operation.

e. Night setback control from low temperature

thermostat, with 2-hour override initiated by
a momentary signal from the thermostat.

f. Dry contact night setback output for digital

night setback thermostats.

g. Ability to work with heat/cool (Y, W)

thermostats.

h. Ability to work with heat pump thermostats

using O or B reversing valve control.

i. Single grounded wire to initiate night set-

back or emergency shutdown.

j. Boilerless system control can switch auto-

matically to electric heat at low loop water
temperature.

k. Control board shall allow up to 3 units to be

operated from one thermostat without any
auxiliary controls.

l. A relay to operate an external damper. The

control to be such that the damper will not
open until 30 minutes after the unit comes

back from Unoccupied mode.
m. Fan speed selection at thermostat.
n. A relay to restart a central pump or control a

24-v motorized water valve.
o. Intelligent fan speed selection based upon

thermostat demand and/or dehumidistat

signal.

6. Carrier PremierLink™ Controller:
This control will function with CCN and Com-

fortVIEW™ software. It shall also be compatible
with ComfortLink™ controllers. It shall be
ASHRAE 62-99 compliant and Internet ready.
It shall accept a CO
space and be Demand Control Ventilation
(DCV) ready. The communication rate must be

38.4K or faster.

7. Optional Controls:
a. Unit-mounted ACO (automatic changeover)

thermostat operating controls shall consist
of temperature setting dial knob, push but­ton switches for Stop, Fan only, Hi fan, Lo
fan. Unit-mounted thermostats shall have a
remote sensor for sensing the return-air
temperature.

sensor in the conditioned

2

36

b. Units designed for connection to remote wall

mounted thermostat shall be wired such that
the operating controls are at the thermostat.
The controller shall be provided with a low
voltage field wiring terminal block. The con­trol scheme shall accommodate MCO or
ACO heat pump thermostats with Y, G, and
O outputs. An alternate controller shall be
available from the factory to accommodate
the Heat/Cool thermostats.

c. Motorized water valves shall be factory

installed and wired. The valve shall remain
open when there is a cooling or heating
demand and the compressor is running. The
valve shall close when the compressor stops
after satisfying the demand or due to lockout
condition.

d. Fresh air dampers shall be motorized with a

spring return. The damper shall open when
Cooling or Heating mode selection is made
from the unit-mounted switches. With a
remote thermostat, the damper shall open
any time the fan is in operation.

e. Night low limit thermostats shall include a

unit-mounted thermostat sensing space tem­perature. Should the space temperature fall
below the limit, the night low limit thermo­stat shall start the fan and compressor oper­ation in Heating mode.

f. Units with the unit-mounted thermostat shall

include a 2-hour override function. The
override switch shall be readily accessible. In
override mode the unit operation shall be
the same as in occupied mode. Override
mode shall be terminated automatically at
the end of a 2-hour period.

g. The unit shall be provided with a factory-

wired cord and plug set conforming to
NEMA (6-20P, 7-20P, or 6-30P).

F. Electrical Requirements:

1. A control box shall be located within the unit
compressor compartment and shall contain a
50 va transformer, 24-volt activated, 3-pole
compressor contactor, terminal block for
thermostat wiring and solid-state controller for
complete unit operation. Electro-mechanical
operation WILL NOT be accepted.

2. Units shall be nameplated for use with time­delay fuses or HACR circuit breakers.

3. Unit controls shall be 24-volt and provide heat­ing or cooling as required by the remote
thermostat.

G. Special Features:

1. Aquazone™ Thermostat Controls (for use with
remote thermostat units):

a. Programmable multi-stage thermostat with

7-day clock, holiday scheduling, large backlit
display and remote sensor capability.

b. Programmable 7-Day Light-Activated Ther-

mostat offers occupied comfort settings with
lights on, unoccupied energy savings with
lights off.

c. Programmable 7-Day Flush-Mount Thermo-

stat offers locking coverplate with tamper
proof screws, flush to wall mount, dual point
with adjustable deadband, O or B terminal,
and optional remote sensor.

d. Programmable 5-Day Thermostat offers

2-stage heat, 2-stage cool, auto changeover,
5-minute built-in compressor protection, lock­ing cover included.

e. Non-programmable Thermostat with 2 heat

stages, 2 cool stages, auto changeover,
5-minute built-in compressor protection, lock­ing cover included.

2. Aquazone System Control Panel:
The panel shall coordinate, monitor, and con-

trol all WSHP units and ancillary equipment
including cooling towers, boilers, and system
pumps.

3. Fire-Rated Hose kits:
Hoses shall have a fixed MPT on one end and a

swivel with an adapter on the other end. Hose
kits shall be either stainless steel or galvanized.

4. Ball Valves (Brass Body):
Ball valves shall be for shutoff and balancing

water flow. Valves shall be available with mem­ory, memory stop, and pressure temperature
ports.

5. Y Strainers (Bronze Body):
Strainers shall have “Y” type configuration with

a brass cap. Strainers shall have a maximum
operating pressure rating of 450 psi. Strainer
screen shall be made of stainless steel.

6. Solenoid Valves (Brass Body):
Valves shall provide slow operation for quiet

system application.

7. Hose Kit Assemblies:
Hose kits shall include 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 mea­sure flow (gpm) with two P/T ports, flexible
stainless steel hose with a swivel and nipple.

8. Remote Sensors:
Sensors for Aquazone flush-mount thermostats

shall be available.

9. PremierLink™ accessories:
PremierLink accessories shall provide a fully

integrated DDC system. Accessories include
supply air temperature sensors, communicating
room sensors, CO

sensors, and linkage ther-

2

mostats.

37

Carrier Corporation • Syracuse, New York 13221 5-03

Book 1 4

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Ta b 5 a 5 a

Book 1

New Pg 40 Catalog No. 525-00049 Printed in U.S.A. PC 111 Form 50KQ-6PD

Ta b 1 IP 4 a

Replaces: 50KQ-5PD