4
LEGEND
*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
LEGEND
*Air Conditioning & Refrigeration Institute.
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.
Cv —
Coefficient of Velocity
MOPD —
Maximum Operating Pressure Differential
UNIT 50KQ
COOLING HEATING
AIRFLOW
CFM
WATER
FLOW RATE
GPM
PRESSRUE
DROP
ft wg
TC TSC THR kW EER TC THA kW COP
007
6,800 5,032 8,500 0.531 12.8 8,600 6,958 0.548 4.6 280 1.7 2.3
009
9,000 6,667 11,500 0.744 12.1 11,600 9,215 0.791 4.3 280 2.3 4.2
012
11,800 8,160 15,000 0.922 12.8 14,000 10,797 1.052 3.9 375 3.0 9.4
015
15,000 10,959 19,000 1.200 12.5 17,100 13,395 1.222 4.1 400 3.8 3.0
019
17,600 12,361 22,500 1.467 12.0 21,000 16,058 1.620 3.8 430 4.5 4.2
CFM —
Cubic Feet Per Minute
COP —
Coefficient of Performance
db —
Dry Bulb Temperature
EER —
Energy Efficiency Ratio
GPM —
Gallons Per Minute
kW —
Total Power Input (Kilowatt Hours)
TC —
Total Capacity (Btuh)
THA —
Total Heat of Absorption (Btuh)
THR —
Total Heat of Rejection (Btuh)
TSC —
Total Sensible Capacity (Btuh)
wb —
Wet Bulb Temperature
Model number nomenclature
Size – Tons
007 – 1/2
009 – 3/4
012 – 1
015 – 1-1/4
019 – 1-1/2
50 KQA 007 L C F 3 0 1 A A
50 – Carrier Prefix
Voltage
1 – 115V/1 Ph/60 Hz***
3 – 208/230V/1 Ph/ 60 Hz
4 – 265V/1 Ph/60 Hz†††
Packaging
1 – Domestic
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
Revision Code
0 – Current Revision – Water Circuit Options
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
Series
KQA – Standard Temperature Range (60 to 95 F)
KQD – Low Temperature Range (40 to 110 F)
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
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
Water Connections/Valve Options*
Connection Side
Left Right
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
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