Carrier | AQUAZONE 50HQL072-120 | Instruction manual | Carrier AQUAZONE 50HQL072-120 Instruction manual

Carrier AQUAZONE 50HQL072-120 Instruction manual
TM
Water Source Heat Pump Units
50HQL,VQL
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2 — Check Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• STORAGE
• PROTECTION
• INSPECT UNIT
Step 3 — Location of Unit . . . . . . . . . . . . . . . . . . . . . . . 10
Step 4 — Mounting the Unit . . . . . . . . . . . . . . . . . . . . . 10
• HORIZONTAL UNITS
• VERTICAL UNITS
Step 5 — Duct System . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• SOUND ATTENUATION
• EXISTING DUCT SYSTEM
Step 6 — Condensate Drain . . . . . . . . . . . . . . . . . . . . . 11
• HORIZONTAL UNITS
• VERTICAL UNITS
• VENTING
Step 7 — Piping Connections . . . . . . . . . . . . . . . . . . . 12
• WATER LOOP APPLICATIONS
• GROUND-WATER APPLICATIONS
• GROUND-LOOP APPLICATIONS
Step 8 — Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . 12
• POWER CONNECTION
• SUPPLY VOLTAGE
• EXTERNAL LOOP POWER CONNECTION
• 208-VOLT OPERATION
• AIRFLOW AND EXTERNAL STATIC PRESSURE
Step 9 — Low Voltage Wiring. . . . . . . . . . . . . . . . . . . . 28
• THERMOSTAT CONNECTIONS
• WATER FREEZE PROTECTION
• AIR COIL FREEZE PROTECTION
• ACCESSORY CONNECTIONS
• WATER SOLENOID VALVES
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . 28-30
C Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 28
C Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 28
D Control Jumper Settings . . . . . . . . . . . . . . . . . . . . 28
D Control DIP Switches . . . . . . . . . . . . . . . . . . . . . . . 29
D Control Accessory Relay Configurations . . . . . 30
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-32
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Start Up System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Scroll Compressor Rotation. . . . . . . . . . . . . . . . . . . . . 31
Unit Start-Up Cooling Mode . . . . . . . . . . . . . . . . . . . . . 31
Unit Start-Up Heating Mode . . . . . . . . . . . . . . . . . . . . . 31
Flow Regulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Page
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cooling Tower/Boiler Systems . . . . . . . . . . . . . . . . . . 32
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems . . . . . . . . . . . . . . . . 32
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32,33
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Units with Aquazone Complete C Control . . . . . . . 32
Units with Aquazone Deluxe D Control . . . . . . . . . . 32
SYSTEM TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Retry Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Aquazone Deluxe D Control LED Indicators . . . . . 33
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34,35
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . . . . 34
Refrigerant System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . . . 34
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Checking System Charge . . . . . . . . . . . . . . . . . . . . . . . 35
Refrigerant Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . . . 35
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 36-38
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Control Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . CL-1, CL-2
IMPORTANT: Read the entire instruction manual before
starting installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when
installing.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00096
Printed in U.S.A.
Form 50H,V-9SI
Pg 1
6-03
Replaces: 50H,V-8SI
Book 1 4
Tab 5a 5a
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and the National Electrical Code (NEC)
for special installation requirements.
Understand the signal words — DANGER, WARNING,
and CAUTION. DANGER identifies the most serious hazards
which will result in severe personal injury or death. WARNING signifies hazards that could result in personal injury or
death. CAUTION is used to identify unsafe practices, which
would result in minor personal injury or product and property
damage.
Recognize safety information. This is the safety-alert
symbol ( ). When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
To avoid equipment damage, do not use these units as a
source of heating or cooling during the construction
process. The mechanical components and filters used in
these units quickly becomes clogged with construction
dirt and debris which may cause system damage.
Step 2 — Check Unit — Upon receipt of shipment at
the jobsite, carefully check the shipment against the bill of
lading. Make sure all units have been received. Inspect the carton or crating of each unit, and inspect each unit for damage.
Ensure the shipping company makes proper notation of any
shortages or damage on all copies of the freight bill. Concealed
damage not discovered during unloading must be reported to
the shipping company within 15 days of receipt of shipment.
NOTE: It is the responsibility of the purchaser to file all
necessary claims with the shipping company.
1. Verify unit is correct model for entering water temperature of job.
2. Be sure that the location chosen for unit installation provides ambient temperatures maintained above freezing.
Well water applications are especially susceptible to
freezing.
3. Be sure the installation location is isolated from sleeping
areas, private offices and other acoustically sensitive
spaces.
NOTE: A sound control accessory package may be used
to help eliminate sound in sensitive spaces.
4. Check local codes to be sure a secondary drain pan is not
required under the unit.
5. Be sure unit is mounted at a height sufficient to provide
an adequate slope of the condensate lines. If an appropriate slope cannot be achieved, a field-supplied condensate
pump may be required.
6. Provide sufficient space for duct connection.
7. Provide adequate clearance for filter replacement and
drain pan cleaning. Do not allow piping, conduit, etc. to
block filter access.
8. Provide sufficient access to allow maintenance and
servicing of the fan and fan motor, compressor and coils.
Removal of the entire unit from the closet should not be
necessary.
9. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of unit if necessary.
10. Provide ready access to water valves and fittings, and
screwdriver access to unit side panels, discharge collar,
and all electrical connections.
11. Where access to side panels is limited, pre-removal of the
control box side mounting screws may be necessary for
future servicing.
STORAGE — If the equipment is not needed for immediate
installation upon its arrival at the jobsite, it should be left in its
shipping carton and stored in a clean, dry area of the building
or in a warehouse. Units must be stored in an upright position
at all times. If carton stacking is necessary, stack units a maximum of 3 high. Do not remove any equipment from its shipping package until it is needed for installation.
Electrical shock can cause personal injury or death. Before
installing or servicing system, always turn off main power
to system. There may be more than one disconnect switch.
Turn off accessory heater power if applicable.
GENERAL
This Installation and Start-Up Instructions literature is for
Aquazone™ Water Source Heat Pump systems.
Water Source Heat Pumps (WSHP) are single-package horizontally and vertically mounted units with electronic controls
designed for year-round cooling and heating.
IMPORTANT: The installation of water source heat pump
units and all associated components, parts, and accessories
which make up the installation shall be in accordance with
the regulations of ALL authorities having jurisdiction and
MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply
with ALL applicable codes and regulations.
INSTALLATION
Step 1 — Check Jobsite — Installation, operation and
maintenance instructions are provided with each unit. Before
unit start-up, read all manuals and become familiar with the
unit and its operation. Thoroughly check out the system before
operation. Complete the inspections and instructions listed
below to prepare a unit for installation. See Tables 1 and 2 for
unit physical data.
HORIZONTAL UNITS (50HQL) — Horizontal units are
designed for indoor installation only. Be sure to allow adequate space around the unit for servicing. See Fig. 1A and 1B
for overall unit dimensions. Refer to Fig. 2 for an example of
a typical horizontal installation.
VERTICAL UNITS (50VQL) — Vertical units are designed
for indoor installation only. While vertical units are typically
installed in a floor-level closet or a small mechanical room, the
unit access guidelines for these units are very similar to those
described for horizontal units. Refer to Fig. 3 for an example of
a typical vertical installation. See Fig. 4A-4C for overall unit
dimensions.
2
Table 1 — Physical Data — 50HQL072-120 Units
UNIT 50HQL
NOMINAL CAPACITY (tons)
COMPRESSOR(S)*
WEIGHT (lb)
Operating
Shipping
AIR COIL
Total Face Area (sq ft)
Tube Size (in.)
Fin Spacing (FPI)
Number of Rows
REFRIGERANT CHARGE† (oz/ckt)
NO. OF CIRCUITS
HIGH-VOLTAGE BUSHING (in.)
FAN
Qty...Wheel Size (D x W) (in.)
Standard (hp)
Large (hp)
Range (rpm)
REFRIGERANT-TO-WATER HEAT EXCHANGER
Connection (FPT) (in. ...TPI)
CONDENSATE DRAIN CONNECTION — FPT
(in. ...TPI)
FILTER STANDARD — 1-IN. THROWAWAY
Qty...Size (H x W) (in.)
072
6
096
8
Scroll
120
10
540
560
580
600
Aluminum Fins, Copper Tubes
8.33
3/
8
14
3
50
2
13 / 8
660
680
6.66
3/
8
14
2
56
1
8.33
3/
8
12
4
80
2
1...12 x 11
1.5
2
2...10 x 10
2...11 x 10
2
2
3
3
760-1014
Steel-Copper or Steel-Cupronickel Tube-in-Tube
11/4...111/2
3/ ...14
4
1...20 x 18 and
2...20 x 20
LEGEND
FPI — Fins per Inch
TPI — Threads per inch
2...20 x 25 and
1...20 x 18
*All units have grommet and spring compressor mountings, and
1/2 in. and 7/8 in. electrical knockouts.
†Check unit label for refrigerant type (R-22 or R-407c).
Table 2 — Physical Data — 50VQL080-300 Units
UNIT 50VQL
080
100
120
160
200
240
300
81 / 2
10
13
17
20
25
61/ 2
NOMINAL CAPACITY (tons)
1...Scroll
1...Scroll
1...Scroll
2...Scroll
2...Scroll
2...Scroll
2...Scroll
COMPRESSOR(S) Qty...Type
WEIGHTS (lb)
600
685
735
1120
1265
1350
1465
Operating
610
695
745
1145
1275
1375
1475
Shipping
Aluminum Fins, Copper Tubes
AIR COIL
9.00
18.00
18.75
Total Face Area (sq ft)
3/
1/
3/
Tube Size (in.)
8
8
2
14
14
15
Fin Spacing (FPI)
2
3
3
2
2
3
4
Number of Rows
110
120
128
110
120
128
192
REFRIGERANT CHARGE R-22 (oz/ckt)
1
1
1
1
2
2
2
NO. OF CIRCUITS
2
13/8-13/4
HIGH-VOLTAGE BUSHING (in.)
FAN
1...12 x 9 1...15 x 15 1...15 x 15 2...12 x 9 2...15 x 15 2...15 x 15 2...15 x 15
Qty...Wheel Size (D x W) (in.)
1.5
1.5
2.0
3.0
1.5
2.0
3.0
Standard Motor (hp)
2.0
2.0
3.0
N/A
2.0
3.0
N/A
Large Motor (hp)
768-982
724-925
768-982
768-982
724-925
768-982
896-1110
Range (rpm)
Steel-Copper or Steel-Cupronickel Tube-in-Tube
REFRIGERANT-TO-WATER HEAT EXCHANGER
11/2...111/2 11/2...111/2 11/2...111/2 11/2...111/2 11/2...111/2 11/2...111/2 11/2...111/2
Water Connection (FPT) (in. ...TPI)
1...111/2
CONDENSATE DRAIN CONNECTION (FPT) (in. ...TPI)
1-in. Throwaway*
FILTER
2...25 x 25
4...25 x 25
Qty...Size (H x W) (in.)
LEGEND
FPI — Fins Per Inch
TPI — Threads Per Inch
*Two-in. filter available as a field-installed accessory.
3
CONNECTIONS
LEFT RETURN STRAIGHT DISCHARGE
BSP
A
1 Water Outlet
11/4″ FPT
2 Water Inlet
11/4″ FPT
24” Service 3 Condensate Drain
Access
4 High Voltage Access
LEFT INLET
B
5 Low Voltage Access
3/ ″
4
FPT
7/
8″
[2.2] K.O.
7/
8″
[2.2] K.O.
E
Filter
Bracket
Shown
LEGEND
BSP — Blower Service Panel
CAP — Control Access Panel
CSP — Compressor Service Panel
C
D
F
FRONT
OF UNIT
2
O
H
CSP
1.8”
NOTES:
1. All dimensions in inches.
2. Flanged filter bracket shipped with unit. Leave
one end of duct collar open for filter removal.
3. All side panels are removable.
4. Available in left return, straight discharge only.
5. Condensate is 3/4 in. FPT copper.
6. Horizontal unit shipped with filter bracket only.
This bracket should be removed for return duct
connection.
N
3
G
1
M
CAP
4.2”
STRAIGHT (RIGHT)
DISCHARGE
L
5
Q P
4
24” Service
Access
Hanger Bracket Dimensions
K
A
U
S
V
FRONT
R
PLAN VIEW
(TOP)
34.1"
T
C
74.1"
Left Return Left View Air Coil Opening
2.2"
HORIZONTAL
MODEL
072
in.
OVERALL
CABINET
A
B
C
Width Depth Height
36.3
72.3
21.6
DISCHARGE CONNECTIONS
(Duct Flange [± 0.10 in.])
D
H
Supply
E
F
G
Supply
Height
Depth
16.0
14.5 4.0 1.0
16.0
WATER
CONNECTIONS
K
L
M
N
ELECTRICAL
KNOCKOUTS
O
21.0 17.8 3.9 22.5 2.0
P
R
5.6 18.3 2.0
Fig. 1A — 50HQL072 Unit Dimensions
4
Q
RETURN AIR CONNECTIONS
(Using Return Air Opening)
S
T
Return
Return
U
V
Depth
Height
51.0
18.4
1.0 19.6
CONNECTIONS
BSP
A
24” Service
Access
LEFT INLET
B
E
Filter
Bracket
Shown
25.5”
CSP
1.8”
N
3
CAP
4.2”
M
Right Discharge
1
L
G
5
Q P
4
2 Water Inlet
11/4″ FPT
3 Condensate Drain
3/ ″
4
FPT
4 High Voltage Access
7/8″
K.O.
5 Low Voltage Access
7/ ″
8
DIA.
NOTES:
1. All Dimensions in inches.
2. Flanged filter bracket shipped with unit. Leave
one end of duct collar open for filter removal.
3. All side panels are removable.
4. Available in left return, right discharge only.
5. Condensate is 3/4 in. FPT copper.
6. Horizontal unit shipped with filter bracket only.
This bracket should be removed for return duct
connection.
F
H
2
11/4″ FPT
LEGEND
BSP — Blower Service Panel
CAP — Control Access Panel
CSP — Compressor Service Panel
C
D
FRONT
OF UNIT
O
1 Water Outlet
Hanger Bracket Dimensions
24” Service
Access
K
U
A
S
FRONT
R
V
PLAN VIEW
(TOP)
34.1"
T
C
74.1"
Left Return Left View Air Coil Opening
2.2"
UNIT
50HQL
OVERALL
CABINET
(in.)
DISCHARGE
CONNECTIONS (in.)
(Duct Flange [± 0.10 in.])
D
A
B
C
Width Depth Height Supply
Height
WATER
CONNECTIONS
(in.)
ELECTRICAL
KNOCKOUTS
(in.)
E
F
G
H
Supply
Depth
K
L
M
N
O
P
Q
R
RETURN AIR
CONNECTIONS (in.)
(Using Return Air Opening)
S
T
Return Return
U
V
Depth Height
096
36.3
72.3
21.0
13.1
2.9
3.8
1.0
15.1
20.7
18.6
3.8
22.4
2.0
5.6
18.3
2.0
63.2
18.4
1.0
7.5
120
36.3
72.3
21.0
13.1
2.9
4.7
1.0
15.1
19.0
19.2
3.8
22.4
2.0
5.6
18.3
2.0
63.2
18.4
1.0
7.5
Fig. 1B — 50HQL096,120 Unit Dimensions
5
3/8” Threaded rods
Optional
Balancing
Valve
Return Air
Thermostat
Wiring
Unit
Power
Dual Blower
Discharge
Optional Low
Pressure Drop
Water Control Valve
Supply Air
Power
Wiring
Water Out
Water In
Y-Strainer with blowoff valve
Insulated supply duct with
at least one 90 deg elbow
to reduce air noise
Ball Valve with
integral P/T plug
Building
Loop
Unit Power
Disconnect
Stainless steel braid hose
with integral “J” swivel
Fig. 2 — Typical Horizontal Installation — 50HQL Units
Supply Air
Optional Discharge
Optional Discharge
Supply Air
Supply Water
Return
Water
24 V Remote
Mtd. Stat
T
Balancing
Valve
Condensate
Water In
Water Out
Unions
Valves
Access
Panel
Access
Panel
Access
Panel
Access
Panel
Power
Supply
Control Box
Trap
Vibration
Pad
Condensate
Fig. 3 — Typical Vertical Installation — 50VQL Units
6
Disconnect
Switch or
Per Local Codes
A
B
D
1
F
S
E
W
Return
Air
C
Air Out
BSP
Air Out
V
BSP
1
T
Return
Air
R
CAP
CAP
U
P
CSP
O
Q
0.75
5
4
N
3
K
L
M
2
Front Return Rear Blow
Rear Return Front Supply
BSP
CAP
CSP
NRP
1
CONNECTIONS
1 Water Inlet
11/2″ FPT
2 Water Outlet
11/2″ FPT
3 Condensate Drain
CSP
(backside)
NRP
4 High Voltage Access 13/8 or 13/4″ K.O.
1/2″
LEGEND
Blower Service Panel
Control Access Panel
Compressor Service Panel
Non-Removable Panel
NOTES:
1. All dimensions in inches [cm].
2. Units require 3′ [91] clearance for water connections, CAP, CSP and BSP service access.
3. All side panels are removable except those identified by NRP (Non-Removable Panel).
1″ FPT
5 Low Voltage Access
—
—
—
—
K.O.
B
0.75
A
D
F
Air Out
E
Air Out
NRP
BSP
BSP
Return
Air
C
Return
Air
5
CSP
4
CAP
CAP
CSP
Front Return Top Blow
3’ Service
Access
3
2
Rear Return Top Supply
1
UNIT
50VQL
DISCHARGE
WATER
CONNECTIONS
CONNECTIONS
(Duct Flange [± 0.10 in.])
D
E
K
L
M
A
B
C
Supply
F 1-Water 2-Water 3-CondWidth Depth Height Supply
Width
Depth
Inlet Outlet ensate
OVERALL
CABINET
ELECTRICAL
KNOCKOUTS
N
O
P
Q
RETURN AIR CONNECTIONS
(Using Duct Flange)
R
S
T
Return Return
Depth Height
U
V
W
080-100
in.
29.0
41.0
71.5
14.7
15.8
11.2
4.0
7.4
14.5
20.5
2.1
20.6
1.0
3.1
34.8
23.4
25.4
3.1
22.6
120
in.
29.0
41.0
71.5
18.8
16.1
5.8
4.0
7.4
14.5
20.5
2.1
20.6
1.0
3.1
34.8
23.4
25.4
3.1
22.6
Fig. 4A — 50VQL080 Unit Dimensions
7
E
Air Out
B
D
G
D
F
A
Air Out
1
Air Out
Air Out
BSP
1.75
BSP
W
Return Air
BSP
R
C
Back Side
Return Air
6.3
S
V
Return Air
S
T
P
CAP
CSP
U
CAP
Q
CSP
5
0.75
3
Return Air
CSP
O
4
Front Return Top Supply
2
N
1
M
L K
Rear Return Top Supply
LEGEND
Blower Service Panel
Control Access Panel
Compressor Service Panel
Non-Removable Panel
CONNECTIONS
1 Water Inlet
11/2″ FPT
2 Water Outlet
11/2″ FPT
3 Condensate Drain
BSP
CAP
CSP
NRP
1″ FPT
NOTES:
1. All dimensions in inches [cm].
2. Units require 3′ [91] clearance for water connections, CAP, CSP and BSP service access.
3. All side panels are removable except those identified by NRP (Non-Removable Panel).
13/8″ or 13/4″ K.O.
4 High Voltage Access
1/2″
5 Low Voltage Access
K.O.
BSP
B
—
—
—
—
1
A
BSP
D
G
F
E
D
Air Out
Air Out
Air Out
C
Air Out
Return
Air
5
BSP
Return
Air
Return Air
4
CAP
CSP
Return Air
CAP
CSP
CSP
3
Front Return Rear Supply
2
3’ Service
Access
1
Rear Return Front Supply
UNIT
50VQL
160
OVERALL
CABINET
DISCHARGE CONNECTIONS
WATER CONNECTIONS
(Duct Flange [± 0.10 in.])
D
E
K
L
M
A
B
C
Supply
F
G 1-Water 2-Water 3-Cond- N
Width Depth Height Supply
Width
Depth
Inlet Outlet ensate
ELECTRICAL
KNOCKOUTS
O
P
Q
R
RETURN AIR CONNECTIONS
(Using Duct Flange)
S
T
Return Return
U
V
W
Depth Height
in.
29.0
82.0
71.5
14.7
15.8
19.4 13.8
4.0
7.4
14.5
20.5
2.1
20.6 1.0
3.1
34.8
23.4
25.4
3.1
22.6
200-240 in.
29.0
82.0
71.5
18.8
16.1
5.8
4.0
7.4
14.5
20.5
2.1
20.6 1.0
3.1
34.8
23.4
25.4
3.1
22.6
22.3
Fig. 4B — 50VQL160-240 Unit Dimensions
8
E
Air Out
B
D
D
F
A
Air Out
G
1
BSP
1.75
BSP
W
Return Air
C
R
Back Side
Return Air
S
T
6.3
S
V
P
CAP
CSP
O
U
Q
CSP
5
4
0.75
3
2
N
1
CONNECTIONS
1 Water Inlet
11/2″ FPT
2 Water Outlet
11/2″ FPT
3 Condensate Drain
M
L
BSP
CAP
CSP
NRP
K
Rear Return Top Supply
13/8″ or 13/4″ K.O.
5 Low Voltage Access
1/2″
K.O.
B
BSP
A
BSP
C
LEGEND
Blower Service Panel
Control Access Panel
Compressor Service Panel
Non-Removable Panel
NOTES:
1. All dimensions in inches [cm].
2. Units require 3′ [91] clearance for water connections, CAP, CSP and BSP service access.
3. All side panels are removable except those identified by NRP (Non-Removable Panel).
1″ FPT
4 High Voltage Access
—
—
—
—
3’
Service
Access
5
Return Air
4
Return Air
CSP
CAP
3’
Service
Access
3
2
1
Front Return Top Supply
UNIT
50VQL
300
in.
OVERALL
CABINET
DISCHARGE CONNECTIONS
WATER CONNECTIONS
(Duct Flange [± 0.10 in.])
D
E
K
L
M
A
B
C
Supply Supply
F
G 1-Water 2-Water 3-Cond- N
Width Depth Height Width
Depth
Inlet Outlet ensate
29.0
82.0
71.5
18.8
16.1
5.8
22.1
4.0
7.4
14.5
20.5
ELECTRICAL
KNOCKOUTS
O
2.1
P
20.6 1.0
Fig. 4C — 50VQL300 Unit Dimensions
9
Q
R
3.1
RETURN AIR CONNECTIONS
(Using Duct Flange)
S
T
Return Return
U
V
W
Depth Height
34.8
23.4
25.4
3.1
22.6
NOTE: Correct placement of the horizontal unit can play an
important part in minimizing sound problems. Since ductwork is normally applied to these units, the unit can be
placed so that the principal sound emission is outside the occupied space in sound-critical applications. A fire damper
may be required by the local code if a fire wall is penetrated.
PROTECTION — Once the units are properly positioned on
the jobsite, they must be covered with either a shipping carton,
vinyl film, or an equivalent protective covering. Open ends of
pipes stored on the jobsite must be capped. This precaution is
especially important in areas where painting, plastering, or
spraying of fireproof material, etc. is not yet complete. Foreign
material that is allowed to accumulate within the units can prevent proper start-up and necessitate costly clean-up operations.
Before installing any of the system components, be sure to
examine each pipe, fitting, and valve, and remove any dirt or
foreign material found in or on these components.
Step 4 — Mounting the Unit
HORIZONTAL UNITS (50HQL) — Horizontal units should
be mounted using the factory-installed hangers. Proper attachment of hanging rods to building structure is critical for safety.
See Fig. 2. Rod attachments must be able to support the weight
of the unit. See Table 1 for unit operating weights.
VERTICAL UNITS (50VQL) — Vertical units are available in
rear or front return air configurations.
Sound minimization is achieved by enclosing the unit within a small mechanical room or a closet. Additional measures
for sound control include the following:
1. Mount the unit so that the return air inlet is 90 degrees to
the return air grille. Install a sound baffle to reduce lineof-sight sound transmitted through return air grilles.
2. Mount the unit on a rubber or neoprene pad to minimize
vibration transmission to the building structure. Extend
the pad beyond all four edges of the unit.
DO NOT store or install units in corrosive environments or
in locations subject to temperature or humidity extremes
(e.g., attics, garages, rooftops, etc.). Corrosive conditions
and high temperature or humidity can significantly reduce
performance, reliability, and service life. Always move
units in an upright position. Tilting units on their sides may
cause equipment damage.
INSPECT UNIT — To prepare the unit for installation, complete the procedures listed below:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the
correct unit has been shipped.
2. Verify that the unit is the correct model for the entering
water temperature of the job.
3. Do not remove the packaging until the unit is ready for
installation.
4. Verify that the refrigerant tubing is free of kinks or dents,
and that it does not touch other unit components.
5. Inspect all electrical connections. Be sure connections are
clean and tight at the terminals.
6. Compressors are internally spring-mounted. Compressors
equipped with external spring vibration isolators must
have bolts loosened and shipping clamps removed.
7. Remove any blower support cardboard from inlet of the
blower if present.
8. Locate and verify any accessory kit located in compressor
section.
9. Remove any access panel screws that may be difficult to
remove once unit is installed.
NOTE: Some codes require the use of a secondary drain pan
under vertical units. Check local codes for more information.
Step 5 — Duct System — The duct system should be
sized to handle the design airflow quietly.
NOTE: Depending on the unit, the fan wheel may have a shipping support installed at the factory. This must be removed
before operating unit.
SOUND ATTENUATION — To eliminate the transfer of
vibration to the duct system, a flexible connector is recommended for both discharge and return air duct connections on
metal duct systems. The supply and return plenums should include internal duct liner of fiberglass or be made of duct board
construction to maximize sound attenuation of the blower.
Installing the WSHP unit to uninsulated ductwork in an unconditioned space is not recommended since it will sweat and
adversely affect the unit’s performance.
To reduce air noise, at least one 90 degree elbow could be
included in the supply and return air ducts, provided system
performance is not adversely impacted. The blower speed can
be also changed in the field to reduce air noise or excessive airflow, provided system performance is not adversely impacted.
EXISTING DUCT SYSTEM — If the unit is connected to
existing ductwork, consider the following:
• Verify that the existing ducts have the proper capacity to
handle the unit airflow. If the ductwork is too small,
larger ductwork should be installed.
• Check existing ductwork for leaks and repair as
necessary.
NOTE: Local codes may require ventilation air to enter the
space for proper indoor air quality. Hard-duct ventilation may
be required for the ventilating air supply. If hard ducted ventilation is not required, be sure that a proper air path is provided
for ventilation air to unit to meet ventilation requirement of the
space.
Step 3 — Location of Unit — The following guidelines should be considered when choosing a location for
WSHP:
• Units are for indoor use only
• Locate in areas where ambient temperatures are between
40 F and 100 F and relative humidity is no greater than
75%
• Provide sufficient space for water, electrical and duct
connections
• Locate unit in an area that allows for easy access and
removal of filter and access panels
• Allow enough space for service personnel to perform
maintenance
• Provisions must be made for return air to freely enter the
space if unit needs to be installed in a confined area such
as a closet
10
Step 6 — Condensate Drain
HORIZONTAL UNITS (50HQL) — Slope the unit toward
the drain at a 1/4 in. per foot pitch. See Fig. 5. If it is not possible to meet the required pitch, a condensate pump should be
installed at the unit to pump condensate to building drain.
Horizontal units are not internally trapped, therefore an external trap is necessary. Each unit must be installed with its
own individual trap and means to flush or blowout the condensate drain line. Do not install units with a common trap or vent.
For typical condensate connections see Fig. 6.
NOTE: Never use a pipe size smaller than the connection.
VERTICAL UNITS (50VQL) — Each unit must be installed
with its own individual trap, vent and means to flush or blowout the condensate drain line. Do not install units with a common trap or vent. See Fig. 6.
Consider the following:
• Units are typically installed directly above each other on
successive floors with condensate drains located near the
units.
• Connect the unit condensate drain connection to the
building condensate drain with a 1-in. drain line.
• The horizontal run of a condensate hose is usually too
short to cause drainage problems, however pitch the horizontal run of the condensate line should be at least
1 inch for every 10 feet of run in the direction of flow.
Avoid low points and unpitched piping since dirt collects
in low or level areas and may cause stoppage and
overflow.
• Install a condensate trap at each unit with the top of
the trap positioned below the unit condensate drain
connection.
• Design the length of the trap (water-seal) based upon the
amount of positive or negative pressure on the drain pan.
As a rule, 1-in. of trap is required for each inch of negative pressure on the unit.
VENTING — A vent should be installed in the condensate
line of any application which may allow dirt or air to collect in
the line. Consider the following:
• Always install a vent where an application requires a
long horizontal run.
• Always install a vent where large units are working
against higher external static pressure and to allow
proper drainage for multiple units connected to the same
condensate main.
• Be sure to support the line where anticipated sagging
from the condensate or when “double trapping” may
occur.
• If condensate pump is present on unit, be sure drain connections have a check valve to prevent back flow of condensate into other units.
1/4” Pitch for
Drainage
Pitch Toward
Drain
Drain Connection
Fig. 5 — Horizontal Unit Pitch
NOTE: Trap should be deep enough to offset maximum unit static
difference.
Fig. 6 — Trap Condensate Drain
11
Step 7 — Piping Connections — Depending on the
In all applications, the quality of the water circulated
through the heat exchanger must fall within the ranges listed in
the Water Quality Guidelines table. Consult a local water treatment firm, independent testing facility, or local water authority
for specific recommendations to maintain water quality within
the published limits.
GROUND-LOOP APPLICATIONS — Temperatures between 25 to 110 F and a cooling capacity of 2.25 to 3 gpm
of flow per ton is recommended. In addition to complying
with any applicable codes, consider the following for system piping:
• Piping materials should be limited to only polyethylene
fusion in the buried sections of the loop.
• Galvanized or steel fittings should not be used at any
time due to corrosion.
• All plastic to metal threaded fittings should be avoided
due to the potential to leak. Use a flange fitted substitute.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Pressure-temperature (P/T) plugs should be used to measure flow of pressure drop.
application, there are 3 types of WSHP piping systems to choose
from: water loop, ground-water and ground loop. Refer to the
Carrier System Design Manual for additional information.
All WSHP units utilize low temperature soldered female
pipe thread fittings for water connections to prevent annealing
and out-of-round leak problems which are typically associated
with high temperature brazed connections. Refer to Tables 1
and 2 for connection sizes. When making piping connections,
consider the following:
• A backup wrench must be used when making screw connections to unit to prevent internal damage to piping.
• Insulation may be required on piping to avoid condensation in the case where fluid in loop piping operates at
temperatures below dew point of adjacent air.
• Piping systems that contain steel pipes or fittings may
be subject to galvanic corrosion. Dielectric fittings may
be used to isolate the steel parts of the system to avoid
galvanic corrosion.
WATER LOOP APPLICATIONS — Water loop applications
usually include a number of units plumbed to a common piping system. Maintenance to any of these units can introduce air
into the piping system. Therefore, air elimination equipment
comprises a major portion of the mechanical room plumbing.
The flow rate is usually set between 2.25 and 3 gpm per ton
of cooling capacity. For proper maintenance and servicing,
pressure-temperature (P/T) ports are necessary for temperature
and flow verification.
In addition to complying with any applicable codes, consider the following for system piping:
• Piping systems utilizing water temperatures below
50 F require 1/2-in. closed cell insulation on all piping
surfaces to eliminate condensation.
• All plastic to metal threaded fittings should be avoided
due to the potential to leak. Use a flange fitted substitute.
• Teflon tape thread sealant is recommended to minimize
internal fouling of the heat exchanger.
• Use backup wrench. Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• The piping system should be flushed prior to operation to
remove dirt and foreign materials from the system.
GROUND-WATER APPLICATIONS — Typical groundwater piping is shown in Fig. 7. In addition to complying with
any applicable codes, consider the following for system
piping:
• Install shut-off valves for servicing.
• Install pressure-temperature plugs to measure flow and
temperature.
• Boiler drains and other valves should be connected using
a “T” connector to allow acid flushing for the heat
exchanger.
• Do not overtighten connections.
• Route piping to avoid service access areas to unit.
• Use PVC SCH80 or copper piping material.
NOTE: PVC SCH40 should not be used due to system high
pressure and temperature extremes.
Water Supply and Quantity — Check water supply. Water
supply should be plentiful and of good quality. See Table 3 for
water quality guidelines.
Step 8 — Electrical Wiring
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position during installation.
Use only copper conductors for field-installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors.
All field installed wiring, including the electrical ground,
MUST comply with the National Electrical Code (NEC) as
well as applicable local codes. In addition, all field wiring must
conform to the Class II temperature limitations described in the
NEC.
Refer to unit wiring diagrams Fig. 8A-10B for fuse sizes
and a schematic of the field connections which must be made
by the installing (or electrical) contractor.
Consult the unit wiring diagram located on the inside of the
compressor access panel to ensure proper electrical hookup.
The installing (or electrical) contractor must make the field
connections when using field-supplied disconnect.
Operating voltage must be the same voltage and phase as
shown in Electrical Data shown in Tables 4A and 4B.
Make all final electrical connections with a length of flexible conduit to minimize vibration and sound transmission to
the building.
POWER CONNECTION — Line voltage connection is
made by connecting the incoming line voltage wires to the
L side of the CC terminal. See Tables 4A and 4B for correct
wire and maximum overcurrent protection sizing.
IMPORTANT: Failure to comply with the above required
water quality and quantity limitations and the closedsystem application design requirements may cause damage
to the tube-in-tube heat exchanger that is not the responsibility of the manufacturer.
12
Water
Control
Valve
Automatic
Balance Valve
Expansion
Tank
Water Out
Water In
From Pump
Shut-Off
Valve
Boiler
Drains
Strainer – Field-Installed Accessory
(16 to 20 mesh recommended for
filter sediment)
PressureTemperature
Plugs
Fig. 7 — Typical Ground-Water Piping Installation
Table 3 — Water Quality Guidelines
CONDITION
ACCEPTABLE LEVEL
pH
7 to 9 range for copper. Cupro-nickel may be used in the 5 to 9 range.
Total
Hardness
Calcium and magnesium carbonate should not exceed 20 grains per gallon (350 ppm).
Iron Oxides
Less than 1 ppm.
Iron Bacteria
No level allowable.
Max Allowable Level
0.5 ppm
0.5 ppm
0.5 ppm
0.5 ppm
None Allowable
Corrosion*
Ammonia, Ammonium Hydroxide
Ammonium Chloride, Ammonium Nitrate
Ammonium Sulfate
Chlorine/Chlorides
Hydrogen Sulfide†
Coaxial Metal
Cu
Cu
Cu
CuNi
—
Use Cupro-nickel heat exchanger when concentrations of calcium or sodium chloride are greater than 125 ppm are present. (Seawater is
approximately 25,000 ppm.)
Brackish
*If the concentration of these corrosives exceeds the maximum allowable 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 has a pH of 7.0.
NOTE: To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.
LEGEND FOR FIG. 8A-10B
AL
AL2
BC
CB
CC
CCH
CO
ECR
ES
FP1
FP2
HP
HWTS
JW1 or
JW4
JW3
LOC
MAS
OAT
PDB
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay Contacts
Jumper Wire for Alarm
Blower Contactor
Circuit Breaker
Compressor Contactor
Crankcase Heater
Sensor, Condensate Overflow
Enthalpy Control Relay
Enthalpy Sensor
Sensor, Water Coil Freeze Protection
Sensor, Air Coil Freeze Protection
High-Pressure Switch
Hot Water Temperature Sensor
Jumper, Alarm Mode
Clippable Field Selection Jumper
Loss of Charge Pressure Switch
Mixed Air Sensor
Outside Air Thermostat
Power Distribution Block
P1
RVS
TRANS
TXV
—
—
—
—
Field Wiring Terminal Block
Reversing Valve Solenoid
Transformer
Thermostatic Expansion Valve
Factory Line Voltage Wiring
Factory Low Voltage Wiring
Field Line Voltage Wiring
Field Low Voltage Wiring
Printed Circuit Trace
Optional Wiring
Ground
Solenoid Coil
Relay Contacts - N.O.
Relay Contacts - N.C.
Temperature Switch
Switch - Low Pressure
Switch - High Pressure
Relay/Contactor Coil
Wire Nut
Splice Cap
Thermistor
Condensate Pan
Circuit Breaker
*Optional wiring.
13
G
LED
NOTES FOR FIG. 9B:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230-v transformers will be connected for 208-v operations.
For 230-v operations, disconnect RED lead at L1, and attach
ORG lead to L1. Close open end of RED lead.
4. FP1 thermistor provides freeze protection for WATER. When
using ANTIFREEZE solutions, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat
wiring must be “Class 1” and voltage rating equal to or greater
than unit supply voltage.
6. 24-v Alarm Signal shown. For Dry Alarm Contact, cut AL2 DRY
(JW4) jumper and dry contact will be available between AL1
and AL2.
7. Transformer secondary ground via Deluxe D control board
standoffs and screws to Control Box. (Ground available from
top two standoffs as shown.)
NOTES FOR FIG. 8A:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230-v transformers will be connected for 208-v operation.
For 230-v operation, disconnect RED lead at L1, and attach
ORG lead to L1. Close open end of RED lead.
4. FPI thermistor provides freeze protection for WATER. When
using ANTIFREEZE solutions, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat
wiring must be “Class 1” and voltage rating equal to or greater
than unit supply voltage.
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 board standoffs and screws
to Control Box. (Ground available from top two standoffs as
shown.)
8. Suffix 1 designates association with lead compressor. Suffix 2
with lag compressor. EXCEPTION FP2, EH1, EH2 ARE PER
LEGEND.
NOTES FOR FIG. 10A:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230-v transformers will be connected for 208-v operation.
For 230-v operation, disconnect RED lead at L1, and attach
ORG lead to L1. Insulate open end of RED lead with insulating tape. 380/420-v transformers will be connected for 380-v
operation.
4. FP1 thermistor provides freeze protection for WATER. When
using ANTIFREEZE solution, cut FP1 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must
be “Class 1” and voltage rating equal to or greater than unit
supply voltage.
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.)
8. Suffix 1 designates association with lead compressor. Suffix 2
with lag compressor. EXCEPTION FP1, FP2.
9. DIP switch no. 2 for Complete C 2 should be off.
NOTES FOR FIG. 8B:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230-v transformer will be connected for 208-v operation.
For 230-v operation, disconnect RED lead at L1, and attach
ORG lead to L1. Insulate open end of RED lead. 380/420-v
transformer will be connected for 380-v operation. For 420-v
operation, disconnect VIO lead at L1 and attach BRN lead to
L1. Insulate open end of VIO lead.
4. FP1 thermistor provides freeze protection for WATER. When
using ANTIFREEZE solution, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat
wiring must be “Class 1” and voltage rating equal to or greater
than unit supply voltage.
6. 24-v Alarm Signal shown. For Dry Alarm Contact, cut AL2 DRY
(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.)
8. Suffix 1 designates association with lead compressor. Suffix 2
with lag compressor. EXCEPTION FP2, EH1, EH2 ARE PER
LEGEND.
NOTES FOR FIG. 10B:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230 v transformers will be connected for 208 v operations.
For 230 v operation, disconnect RED lead at L1, and attach
ORG lead to L1. Close open end of RED lead.
4. FP1 thermistor provides freeze protection for WATER. When
using ANTIFREEZE solutions, cut JW3 jumper.
5. Typical heat pump thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat
wiring must be “Class 1” and voltage rating equal to or greater
than unit supply voltage.
6. 24-v Alarm Signal shown. For Dry Alarm Contact, cut AL2 DRY
(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.)
8. Suffix 1 designates association with lead compressor. Suffix 2
with lag compressor, EXCEPTION FP1, FP2.
NOTES FOR FIG. 9A:
1. Compressor and blower motor thermally protected internally.
2. All wiring to the unit must comply with NEC and local codes.
3. 208/230-v transformers will be connected for 208-v operation.
For 230-v operation, disconnect RED lead at L1, and attach
ORG lead to L1. Close open end of RED lead with insulating
tape.
4. FP1 jumper provides freeze protection for WATER. When using
ANTIFREEZE solutions, cut FP1 jumper.
5. Typical thermostat wiring shown. Refer to thermostat installation instructions for wiring to the unit. Thermostat wiring must
be “Class 1” and voltage rating equal to or greater than unit
supply voltage.
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 Control C board standoffs
and screws to Control Box. (Ground available from top two
standoffs as shown.).
14
15
AQUAZONE
THERMOSTAT
Fig. 8A — 50HQL072-120 and 50VQL160, With Complete C Controls (Typical)
16
AQUAZONE
THERMOSTAT
Fig. 8B — 50HQL072-120 and 50VQL160 with Deluxe D Controls (Typical)
17
AQUAZONE
THERMOSTAT
Fig. 9A — 50VQL080-120 with Complete C Controls (Typical)
18
Fig. 9B — 50VQL080-120 with Deluxe D Controls (Typical)
AQUAZONE
THERMOSTAT
19
AQUAZONE
THERMOSTAT
Fig 10A — 50VQL200-300 with Complete C Controls (Typical)
20
AQUAZONE
THERMOSTAT
Fig. 10B — 50VQL200-300 with Deluxe D Controls (Typical)
Table 4A — Electrical Data — 50HQL072-120 Units
UNIT
50HQL
VOLTAGE
(3 Ph — 60 Hz)
VOLTAGE
RANGE
Min
Max
208/230
187
253
460
414
506
208/230
187
253
460
414
506
575
518
633
208/230
187
253
460
414
506
575
518
633
072
096
120
FLA
HACR
LRA
MCA
MOCP
RLA
—
—
—
—
—
—
BLOWER MOTOR
FACTORY INSTALLED
OPTION
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
FAN
MOTOR
HP
FLA
1.5
5.0
2.0
6.2
1.5
2.4
2.0
3.1
2.0
6.5
3.0
8.8
2.0
3.1
3.0
4.2
2.0
2.8
3.0
3.4
2.0
6.5
3.0
8.8
2.0
3.1
3.0
4.2
2.0
2.8
3.0
3.4
COMPRESSOR
Qty
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
RLA
10.4
10.4
4.9
4.9
14.3
14.3
7.2
7.2
5.7
5.7
19.3
19.3
7.5
7.5
6.4
6.4
LRA
65.5
65.5
33.0
33.0
91.0
91.0
46.0
46.0
37.0
37.0
123.0
123.0
49.5
49.5
40.0
40.0
TOTAL
FLA
MCA
MOCP*
25.8
27.0
12.2
12.9
35.1
37.4
17.5
18.6
14.2
14.8
45.1
47.4
18.1
19.2
15.6
16.2
28.4
29.6
13.4
14.1
38.7
41.0
19.3
20.4
15.6
16.2
49.9
52.2
20.0
21.1
17.2
17.8
35
40
15
15
50
50
25
25
20
20
60
70
25
25
20
20
LEGEND
Full Load Amps
Heating, Air Conditioning, and Refrigeration
Locked Rotor Amps
Minimum Circuit Amps
Minimum Over Current Protection
Rated Load Amps
*Time-delay fuse or HACR circuit breaker.
Table 4B — Electrical Data — 50VQL080-300 Units
UNIT
50VQL
VOLTAGE
(3 Ph - 60 Hz)
VOLTAGE RANGE
Min
Max
208-230
197
253
460
414
506
575
518
633
208-230
197
253
460
414
506
575
518
633
208-230
197
253
120
460
414
506
575
518
633
160
208-230
460
575
197
414
518
253
506
633
208-230
197
253
460
414
506
575
518
633
208-230
197
253
240
460
414
506
575
518
633
300
208-230
460
575
197
414
518
253
506
633
080
100
200
FLA
HACR
LRA
MCA
MOCP
RLA
—
—
—
—
—
—
BLOWER MOTOR
FACTORY-INSTALLED
OPTION
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Standard
Standard
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Large
Standard
Standard
Standard
COMPRESSOR
FAN MOTOR
Qty
RLA
LRA
Qty
HP
FLA
TOTAL
FLA
MCA
MOCP*
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
20.7
20.7
10.0
10.0
8.2
8.2
32.1
32.1
16.4
16.4
12.0
12.0
33.6
33.6
17.3
17.3
13.5
13.5
20.7
10.0
8.2
32.1
32.1
16.4
16.4
12.0
12.0
33.6
33.6
17.3
17.3
13.5
13.5
47.1
19.6
15.8
156
156
75
75
54
54
195
195
95
95
80
80
225
225
114
114
80
80
156
74
54
195
195
95
95
80
80
225
225
114
114
80
80
245
125
100
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1.5
2.0
1.5
2.0
1.5
2.0
1.5
2.0
1.5
2.0
1.5
2.0
2.0
3.0
2.0
3.0
2.0
3.0
3.0
3.0
3.0
1.5
2.0
1.5
2.0
1.5
2.0
2.0
3.0
2.0
3.0
2.0
3.0
3.0
3.0
3.0
5.0
6.2
2.4
3.1
1.9
2.3
5.8
6.2
2.4
3.1
1.9
2.3
6.2
8.4
3.1
4.2
2.3
3.4
8.4
4.2
3.4
5.0
6.2
2.4
3.1
1.9
2.3
6.2
8.4
3.1
4.2
2.3
3.4
8.4
4.2
3.4
25.7
26.9
12.4
13.1
10.1
10.5
37.9
38.3
18.8
19.5
13.9
14.3
39.8
42.0
20.4
21.5
15.8
16.9
49.8
24.2
19.8
74.2
76.6
37.6
39.0
27.8
28.6
79.6
84.0
40.8
43.0
31.6
33.8
111.0
47.6
38.4
30.9
32.1
14.9
15.6
12.1
12.5
45.9
46.3
22.9
23.6
16.9
17.3
48.2
50.4
24.5
25.8
19.2
20.3
55.0
26.7
21.9
75.8
84.6
41.7
43.1
30.8
31.6
88.0
92.4
45.1
47.3
35.0
37.2
122.8
52.5
42.4
50
50
20
25
20
20
70
70
35
40
25
25
80
80
40
40
30
30
70
35
30
110
110
50
50
40
40
110
125
60
60
45
50
150
70
50
LEGEND
Full Load Amps
Heating, Air Conditioning, and Refrigeration
Locked Rotor Amps
Minimum Circuit Amps
Minimum Over Current Protection
Rated Load Amps
NOTE: Contact factory for electrical data with optional oversize blower motor.
*Time-delay fuse or HACR circuit breaker.
21
Sheave Adjustment — The 50HQL,VQL units are supplied
with a variable sheave drive on the fan motor to adjust for
differing airflows at various ESP (external static pressure) conditions. See Tables 5A-5J for unit airflows. When fully closed,
the sheave will produce the highest static capability (higher
rpm). To adjust sheave position, follow the procedure outlined
below:
1. Loosen belt tension and remove belt.
2. Loosen set screw on fan motor.
3. Open sheave to desired position.
4. Retighten set screw and replace belt.
NOTE: Set belt tension as outlined below.
Belt Tension Adjustment — An overly loose belt will, upon
starting motor, produce a slippage “squeal” and cause premature belt failure and or intermittent airflow. An overly tight belt
can cause premature motor or blower bearing failure. To adjust
the belt tension, follow the procedure outlined below:
1. Remove belt from motor sheave.
2. Lift motor assembly.
3. Loosen the 5/16-in. hex nuts on the grommet motor adjustment bolts (2 per bolt). To increase the belt tension loosen
the top hex nut. To decrease the belt tension loosen the
bottom hex nut.
4. Turn the bolts by hand to the desired position then tighten
the 5/16-in. hex nuts (2 per bolt).
5. Lower the motor assembly.
6. Install the belt.
7. The belt tension can be adjusted by using one of the following methods:
a. Tighten until belt deflects approximately 1/2-in.
with very firm finger pressure.
b. Grasp belt midway between two pulleys and twist
for a 90 degree rotation.
NOTE: Adjusting less than 90 degrees will overtighten the belt and adjusting more than 90 degrees
will loosen belt.
c. Set proper belt tension to 70 to 80 lb.
NOTE: The motor position should not need adjustment. Motor
sheave position is at mid position of each sheave. For example,
the motor sheave is 2.5 turns open on a 5-turn sheave. The belt
tension adjustment can also be accomplished by turning the
5/16-in. hex nuts to the desired position.
NOTE: Available airflows for all units are shown in
Tables 5A-5J.
SUPPLY VOLTAGE — Operating voltage to unit must be
within voltage range indicated on unit nameplate.
On 3-phase units, voltages under load between phases must
be balanced within 2%. Use the following formula to determine the percentage voltage imbalance:
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 volts
BC = 464 volts
AC = 455 volts
Average Voltage =
=
452 + 464 + 455
3
1371
3
= 457
Determine maximum deviation from average voltage:
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent voltage imbalance.
% Voltage Imbalance = 100 x
7
457
= 1.53%
This amount of phase imbalance is satisfactory as it is
below the maximum allowable 2%.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to electrical components.
NOTE: If more than 2% voltage imbalance is present, contact
local electric utility.
EXTERNAL LOOP POWER CONNECTION — If the unit
is to be connected to an external loop pump or flow controller,
connect the pump to the loop pump terminal block PB1. The
maximum power handling is 4 amps at 240 volts. The pumps
will automatically cycle as required by the unit.
208-VOLT OPERATION — All 208-240 volt units are factory
wired for 208 volts. The transformers may be switched to
240-volt operation (as illustrated on the wiring diagram) by
switching the red (208 volt) wire with the orange (240 volt)
wire at the L2 terminal.
AIRFLOW AND EXTERNAL STATIC PRESSURE —
The 50HQL,VQL units are available with standard, low, and
high static factory-installed options. These options will substitute a different blower drive sheave for each static range. In
addition, certain static ranges may require the optional 3 hp fan
motor.
22
Table 5A — 50HQL072 Blower Performance Data
RATED
CFM
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
1800
2000
2200
2400
2600
2800
3000
—
BHP
ESP
RPM
A
B
C
E
—
—
—
—
—
—
—
—
0.0
—
—
—
0.27
484
5.0
0.36
544
4.0
0.49
605
2.5
0.64
667
1.5
0.81
729
5.0
1.02
793
3.5
0.1
0.23
482
5.0
0.31
534
4.0
0.41
589
3.0
0.54
647
2.0
0.69
705
1.0
0.87
764
4.0
1.09
825
3.0
0.2
0.26
536
4.0
0.35
582
3.0
0.46
633
2.0
0.59
687
1.0
0.75
742
4.5
0.93
799
3.5
1.15
858
2.5
0.3
0.31
587
3.0
0.40
629
2.0
0.51
676
1.5
0.64
726
5.0
0.81
779
4.0
1.00
833
3.0
1.22
889
1.5
B
0.4
0.35
636
2.0
0.44
674
1.5
0.56
717
5.0
0.70
765
4.0
0.86
814
3.0
1.06
866
2.0
1.29
920
1.0
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
0.39 0.44
0.48
0.53
0.58
0.63
683
729
773
816
858
899
1.0
5.0
4.0
3.0
2.5
1.5
0.49 0.54
0.59
0.64
0.69
0.75
717
760
801
841
881
919
5.0
4.0
3.5
2.5
2.0
1.0
0.61 0.66
0.72
0.77
0.83
0.88
758
797
836
873
910
946
4.0
3.5
3.0
2.0
1.5
0.5
0.75 0.81
0.87
0.93
0.99
1.05
802
839
875
910
945
979
3.5
2.5
2.0
1.5
0.5
0.0
0.92 0.99
1.05
1.11
1.17
1.24
849
884
917
950
983
1015
2.5
2.0
1.0
0.5
0.0
3.5
1.12 1.19
1.25
1.32
1.39
1.46
899
931
962
993
1024
1054
1.5
1.0
0.5
0.0
3.5
3.0
1.35 1.42
1.49
1.56
1.64
1.71
951
981
1011
1040
1069
1098
0.5
0.0
3.5
3.5
3.0
2.5
A
1.1
0.68
938
1.0
0.80
956
0.5
0.94
982
0.0
1.11
1012
3.5
1.30
1046
3.0
1.52
1084
2.5
1.78
1126
2.0
E
1.2
0.73
977
0.0
0.86
993
4.0
1.00
1016
3.5
1.17
1045
3.0
1.37
1078
2.5
1.60
1114
2.0
1.85
1154
1.5
1.3
0.79
1015
3.5
0.91
1029
3.5
1.06
1050
3.0
1.24
1077
3.0
1.44
1108
2.5
1.67
1143
2.0
1.93
1182
1.0
1.4
0.84
1052
3.0
0.97
1064
3.0
1.12
1084
2.5
1.30
1109
2.5
1.51
1138
2.0
1.74
1171
1.5
—
—
—
C
1.5
0.90
1088
2.5
1.03
1098
2.5
1.18
1116
2.0
1.37
1140
2.0
1.57
1168
1.5
1.81
1199
1.0
—
—
—
3. ISO/ARI rating point with standard static sheave and drive at
3.5 turns open (2400 cfm at 0.5 in. wg ESP Wet Coil). Other
speeds require field selection.
4. For applications requiring higher static pressures, contact your local
representative.
5. Based on 12x11 blower.
6. Performance data does not include drive losses and is based on
sea level conditions.
7. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208 V for 208-230 V units.
8. For wet coil performance first calculate the face velocity of the air
coil (Face Velocity [fpm] = Airflow [cfm] / Face Area [sq ft]). Then for
velocities of 200 fpm reduce the static capability by 0.03 in. wg,
300 fpm by 0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by
0.16 in. wg.
9. Large motor size is 2 hp for 50HQL072 and 3 hp for 50HQL096.
LEGEND
Operation Not Recommended
Brake Horsepower
External Static Pressure
Revolutions Per Minute
Units with Standard Static/Standard Motor Option
Units with Low-Static/Standard Motor Option
Units with High-Static/Standard Motor Option
Units with High-Static/Large Motor Option
NOTES:
1. Boldface requires 2 hp motor.
2. Units factory shipped with standard static sheave and drive at
2.5 turns open (2400 cfm at 0.5 in. wg ESP Wet Coil). Other
speeds require field selection.
Table 5B — 50HQL096 Blower Performance Data
RATED
CFM
2600
2800
3000
3200
3400
3600
3800
—
ARI
BHP
ESP
ISO
RPM
A
B
C
D
E
—
—
—
—
—
—
—
—
—
—
—
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
—
—
—
0.87
1012
4.5
1.05
1070
3.5
1.25
1126
2.5
1.46
1179
1.0
1.69
1230
4.5
1.94
1280
4.0
0.1
—
—
—
0.94
1058
3.5
1.12
1114
2.5
1.32
1167
1.5
1.54
1219
0.5
1.78
1268
4.0
2.03
1316
3.0
0.2
0.84
1048
4.0
1.01
1104
2.5
1.20
1157
1.5
1.40
1208
0.5
1.62
1257
4.5
1.87
1305
3.5
2.13
1351
2.5
B
0.3
0.91
1095
3.0
1.08
1148
2.0
1.27
1199
0.5
1.48
1248
4.5
1.71
1296
3.5
1.95
1341
3.0
2.22
1387
2.0
0.4
0.97
1140
2.0
1.15
1191
1.0
1.35
1239
4.5
1.56
1287
3.5
1.79
1333
3.0
2.04
1377
2.0
2.31
1421
1.5
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
1.04
1.10
1.17
1.24
1.31
1.37
1184 1226 1267 1308 1346 1384
1.0
0.0
4.0
3.5
2.5
2.0
1.22
1.29
1.36
1.43
1.51
1.58
1232 1273 1313 1351 1389 1426
4.5
4.0
3.5
2.5
2.0
1.5
1.42
1.50
1.57
1.65
1.73
1.80
1280 1319 1356 1394 1430 1465
4.0
3.0
2.5
2.0
1.5
0.5
1.64
1.72
1.80
1.88
2.00
2.04
1325 1362 1400 1435 1470 1505
2.0
1.0
0.5
0.0
3.0
2.5
1.88
1.96
2.05
2.13
2.22
2.31
1369 1406 1441 1475 1510 1543
2.5
1.5
1.0
0.5
0.0
4.0
2.13
2.22
2.31
2.40
2.49
2.58
1413 1447 1481 1515 1548 1580
1.5
1.0
0.5
0.0
4.0
3.5
2.41
2.50
2.59
2.69
2.78
2.88
1455 1488 1521 1553 1586 1617
1.0
0.5
4.0
3.5
3.0
3.0
A
D
LEGEND
Operation Not Recommended
Air Conditioning and Refrigeration Institute
Brake Horsepower
External Static Pressure
International Organization for Standardization
Revolutions Per Minute
Units with Standard Static Sheave/Standard Motor Option
Units with Low-Static Sheave/Standard Motor Option
Units with High-Static Sheave/Standard Motor Option
Units with Standard Static Sheave/Large 3 Hp Motor Option
Units with High-Static Sheave/Large 3 Hp Motor Option
3.
4.
5.
6.
7.
NOTES:
1. Boldface requires 2 hp motor.
2. Units factory shipped with standard static sheave and drive at
2.5 turns open (3200 cfm at 0.6 in. wg ESP). Other speeds require
23
1.1
1.44
1421
1.5
1.65
1461
1.0
1.88
1501
0.0
2.13
1538
4.0
2.39
1576
3.5
2.67
1612
3.0
2.97
1648
2.5
1.2
1.51
1457
1.0
1.73
1497
4.5
1.96
1534
4.0
2.21
1571
3.5
2.48
1608
3.0
2.76
1643
2.5
—
—
—
1.3
1.58
1493
4.5
1.80
1531
4.0
2.04
1568
3.5
2.29
1604
3.0
2.57
1639
2.5
2.85
1674
2.0
—
—
—
E
1.4
1.65
1527
4.0
1.87
1564
3.5
2.12
1601
3.0
2.38
1636
2.5
2.65
1671
2.0
2.94
1705
1.5
—
—
—
C
1.5
1.72
1560
3.5
1.95
1597
3.0
2.20
1632
2.5
2.46
1667
2.0
2.74
1702
1.5
—
—
—
—
—
—
field selection. ISO/ARI rating point with standard static sheave and
drive at 3.5 turns open (3200 cfm at 0.4 in. wg ESP). Other speeds
require field selection.
For applications requiring higher static pressures, contact your local
representative.
Based on 2-10x10 blowers.
Performance data does not include drive losses and is based on
sea level conditions.
All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208V for 208-230V units.
For wet coil performance first calculate the face velocity of the air
coil (Face Velocity [fpm] = Airflow [cfm] / Face Area [sq ft]). Then for
velocities of 200 fpm reduce the static capability by 0.03 in. wg,
300 fpm by 0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by
0.16 in. wg.
Table 5C — 50HQL120 Blower Performance Data
RATED
CFM
3400
3600
3800
4000
4200
4400
4600
—
BHP
ESP
RPM
A
B
C
D
E
—
—
—
—
—
—
—
—
—
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
1.10
1014
3.0
1.26
1052
2.5
1.44
1090
1.5
1.63
1127
0.5
1.84
1164
4.0
2.07
1202
3.5
2.30
1237
3.0
0.1
1.15
1043
2.5
1.31
1081
1.5
1.50
1118
1.0
1.70
1154
4.5
1.91
1191
3.5
2.13
1227
3.0
2.37
1262
2.5
0.2
1.20
1072
2.0
1.37
1109
1.0
1.56
1145
0.0
1.76
1181
4.0
1.98
1217
3.0
2.20
1251
2.5
2.44
1287
2.0
B
0.3
1.25
1102
1.0
1.42
1136
0.5
1.61
1172
4.0
1.82
1207
3.5
2.04
1241
2.5
2.27
1276
2.0
2.51
1310
1.5
0.4
1.30
1129
0.5
1.48
1163
4.0
1.67
1199
3.5
1.88
1232
3.0
2.10
1266
2.5
2.33
1300
1.5
2.59
1333
1.0
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
1.35
1.40
1.45
1.50
1.54
1.59
1156 1183 1209 1234 1260 1285
4.5
4.0
3.5
3.0
2.5
2.0
1.53
1.58
1.63
1.68
1.74
1.79
1190 1216 1241 1266 1291 1315
3.5
3.0
2.5
2.5
2.0
1.5
1.73
1.78
1.84
1.89
1.95
2.00
1223 1248 1273 1298 1321 1345
3.0
2.5
2.0
1.5
1.0
1.0
1.94
2.00
2.06
2.11
2.17
2.22
1257 1281 1306 1329 1352 1375
2.5
2.0
1.5
1.0
0.5
0.0
2.16
2.22
2.28
2.34
2.40
2.47
1291 1314 1337 1360 1383 1406
2.0
1.5
1.0
0.5
0.0
3.5
2.40
2.46
2.53
2.60
2.66
2.73
1323 1346 1369 1392 1414 1435
1.0
1.0
0.5
0.0
3.5
3.5
—
2.66
2.73
2.80
2.87
2.95
—
1356 1379 1402 1423 1444
—
0.5
0.0
4.0
3.5
3.0
A
D
1.1
1.63
1309
1.5
1.84
1338
1.0
2.06
1368
0.5
2.28
1398
0.0
2.53
1427
3.5
2.79
1457
3.0
—
—
—
1.2
1.68
1333
1.0
1.89
1362
4.5
2.11
1391
0.0
2.34
1420
3.5
2.59
1449
3.0
2.86
1478
2.5
—
—
—
1.3
1.73
1356
4.5
1.94
1385
4.0
2.16
1413
3.5
2.39
1441
3.0
2.65
1470
2.5
2.93
1500
2.5
—
—
—
1.4
1.77
1380
4.0
1.99
1408
3.5
2.21
1435
3.5
2.45
1463
3.0
2.71
1492
2.5
2.99
1520
2.0
—
—
—
C
E
1.5
1.82
1403
4.0
2.04
1430
3.5
2.26
1457
3.0
2.50
1485
2.5
2.77
1513
2.0
—
—
—
—
—
—
3. For applications requiring higher static pressures, contact your local
representative.
4. Based on 2-11x10 blowers.
5. Performance data does not include drive losses and is based on
sea level conditions.
6. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208V for 208-230V units.
7. For wet coil performance first calculate the face velocity of the air
coil (Face Velocity [fpm] = Airflow [cfm] / Face Area [sq ft]). Then for
velocities of 200 fpm reduce the static capability by 0.03 in. wg,
300 fpm by 0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by
0.16 in. wg.
LEGEND
Operation Not Recommended
Brake Horsepower
External Static Pressure
Revolutions Per Minute
Units with Standard Static Sheave/Standard Motor Option
Units with Low-Static Sheave/Standard Motor Option
Units with High-Static Sheave/Standard Motor Option
Units with Standard Static Sheave/Large 3 Hp Motor Option
Units with High-Static Sheave/Large 3 Hp Motor Option
NOTES:
1. Boldface requires 3 hp motor.
2. Units factory shipped at ISO/ARI setting with standard static
sheave and drive at 2.5 turns open (4000 cfm at 0.5 in. wg ESP).
Other speeds require field selection.
Table 5D — 50VQL080 Blower Performance Data
RATED
CFM
2000
2200
2400
2600
2800
3000
3200
A
B
C
E
BHP
RPM
—
—
—
—
—
—
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.36
600
3
0.45
633
2
0.55
670
1.5
0.68
708
0.5
0.82
744
4.5
0.97
777
4
1.14
807
3.5
0.1
0.39
641
2
0.49
671
1.5
0.60
705
1
0.73
741
4.5
0.87
775
4
1.03
807
3.5
1.19
835
3
0.2
0.43
681
1
0.53
708
0.5
0.64
740
4.5
0.77
773
4
0.92
806
3.5
1.08
836
3
1.25
862
2.5
B
0.3
0.47
720
0.5
0.57
745
4.5
0.69
774
4
0.82
805
3.5
0.97
836
3
1.14
865
2
1.31
890
1.5
0.4
0.51
757
4.5
0.61
780
4
0.73
807
3.5
0.87
837
2.5
1.02
866
2
1.19
893
1.5
1.36
917
1
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
0.55 0.59 0.63
0.67
0.71
0.76
794
829
864
898
931
964
3.5
3
2
1.5
1
0.5
0.65 0.70 0.74
0.79
0.83
0.88
814
848
881
913
945
976
3
2.5
2
1.5
0.5
0
0.78 0.82 0.87
0.92
0.97
1.02
840
872
903
934
964
993
2.5
2
1.5
1
0.5
3
0.92 0.97 1.02
1.07
1.12
1.17
867
898
927
957
985
1013
2
1.5
1
0.5
0
3
1.08 1.13 1.18
1.24
1.29
1.34
895
924
952
980
1007
1034
1.5
1
0.5
0
3
2.5
1.25 1.30 1.36
1.41
1.47
1.53
921
948
975
1002
1028
1054
1
0.5
0
3
2.5
2
1.42 1.48 1.54
1.60
1.66
1.72
943
969
995
1021
1046
1071
0.5
3
3
2.5
2
2
A
1.1
0.80
996
3
0.92
1006
3
1.07
1022
2.5
1.22
1041
2.5
1.40
1061
2
1.59
1079
2
1.78
1095
1.5
1.2
0.84
1027
2.5
0.97
1036
2.5
1.11
1051
2
1.28
1069
2
1.45
1087
1.5
1.65
1104
1.5
1.3
0.89
1058
2
1.02
1066
2
1.16
1079
2
1.33
1096
1.5
1.51
1113
1.5
1.70
1129
1
C
E
1.4
0.93
1088
1.5
1.06
1095
1.5
1.22
1107
1.5
1.38
1122
1
1.57
1138
1
1.76
1154
0.5
1.5
0.98
1117
1
1.11
1123
1
1.27
1134
1
1.44
1149
0.5
1.62
1164
0.5
1.82
1178
0
4. ISO/ARI rating point with standard static sheave and drive at 2 turns
open (2600 cfm at 0.48 in. wg ESP Wet Coil). Other speeds require
field selection.
5. For applications requiring higher static pressures, contact your local
representative.
6. Performance data does not include drive losses and is based on sea
level conditions.
7. Do not operate in gray region.
8. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208 v for 208-230-v units.
9. For wet coil performance first calculate the face velocity of the air coil
(Face Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of 200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by
0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by 0.16 in. wg.
LEGEND
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Standard Motor Option
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
NOTES:
1. Bold numbers require 2 horsepower motor.
2. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from
the position shown above.
3. Units factory shipped with standard static sheave and drive at 2.5
turns open (2600 cfm at 0.4 in. wg ESP Wet Coil). Other speeds
require field selection.
24
Table 5E — 50VQL100 Blower Performance Data
RATED
CFM
2700
2900
3100
3300
3500
3700
3900
4100
A
B
E
BHP
RPM
—
—
—
—
—
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.82
550
4.5
0.93
570
4
0.1
0.2
0.68
549
4.5
0.78
566
4
0.89
584
3.5
1.00
602
3.5
0.58
553
4.5
0.66
569
4
0.75
584
3.5
0.85
600
3.5
0.96
616
3
1.08
633
2.5
0.3
0.50
561
4.5
0.57
576
4
0.64
590
3.5
0.73
604
3
0.82
618
3
0.92
633
2.5
1.03
648
2
1.15
664
1.5
B
0.4
0.56
599
3.5
0.63
613
3
0.71
626
2.5
0.80
638
2.5
0.89
651
2
0.99
665
1.5
1.10
679
1.5
1.23
693
1
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
0.63
0.70
0.77
0.84
0.90
0.97
635
670
704
736
767
797
2.5
1.5
4.5
4
3.5
3
0.70
0.78
0.86
0.92
0.99
1.06
648
682
714
746
776
805
2
1
4.5
4
3
2.5
0.78
0.86
0.94
1.02
1.10
1.19
660
693
724
755
784
813
2
1
4.5
3.5
3
2.5
0.87
0.94
1.02
1.11
1.19
1.28
671
703
734
764
793
821
1.5
4.5
4
3.5
3
2.5
0.96
1.04
1.12
1.21
1.28
1.36
683
714
744
773
802
829
1
4.5
4
3.5
2.5
2
1.07
1.15
1.23
1.31
1.40
1.48
696
726
755
783
811
838
1
4
3.5
3
2.5
4
1.18
1.26
1.35
1.43
1.52
1.62
709
738
766
794
821
847
4.5
4
3.5
3
4
4
1.31
1.39
1.48
1.56
1.66
1.75
722
751
778
805
832
857
4.5
3.5
5
4.5
4
3.5
A
LEGEND
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
1.1
1.03
826
2
1.13
833
2
1.27
841
2
1.36
848
2
1.44
856
1.5
1.55
864
3.5
1.71
873
3.5
1.85
883
3
1.2
1.10
854
1.5
1.20
861
1.5
1.35
868
1.5
1.45
874
3.5
1.52
882
3
1.63
889
3
1.81
898
3
E
1.3
1.17
881
1
1.26
887
1
1.43
894
1
1.53
900
3
1.59
907
2.5
1.70
914
2.5
1.4
1.23
907
0.5
1.33
913
0.5
1.52
919
2.5
1.62
925
2.5
1.67
932
2
1.78
939
2
1.5
1.30
933
0
1.40
938
0
1.60
944
2
1.70
950
2
1.75
956
2
4. ISO/ARI rating point with standard static sheave and drive at 3.5 turns
open (3500 cfm at 0.45 in. wg ESP Wet Coil). Other speeds require field
selection.
5. For applications requiring higher static pressures, contact your local
representative.
6. Performance data does not include drive losses and is based on sea level
conditions.
7. Do not operate in gray region.
8. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v
for 208-230-v units.
9. For wet coil performance first calculate the face velocity of the air coil (Face
Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of
200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg,
400 fpm by 0.12 in. wg and 500 fpm by 0.16 in. wg.
NOTES:
1. Bold numbers require 2 horsepower motor.
2. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from the
position shown above.
3. Units factory shipped with standard static sheave and drive at 2.5 turns
open (3500 cfm at 0.7 in. wg ESP Wet Coil). Other speeds require field
selection.
Table 5F — 50VQL120 Blower Performance Data
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
A
B
C
E
BHP
RPM
—
—
—
—
—
—
RATED
CFM
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.87
560
4.5
0.99
580
4
1.13
601
3.5
1.27
623
2.5
0.1
0.2
0.73
557
4.5
0.83
575
4
0.94
593
3.5
1.07
611
3
1.20
631
2.5
1.35
652
2
0.54
546
4.5
0.62
561
4.5
0.70
576
4
0.80
592
3.5
0.90
608
3
1.01
624
2.5
1.14
642
2.5
1.28
660
2
1.43
680
1.5
0.3
0.53
569
4
0.60
583
4
0.68
597
3.5
0.77
611
3
0.87
625
2.5
0.97
640
2.5
1.09
656
2
1.22
672
1.5
1.36
689
1
1.51
707
4.5
0.4
0.60
606
3
0.67
619
3
0.75
632
2.5
0.84
645
2
0.94
658
2
1.05
672
1.5
1.16
686
1
1.29
701
4.5
1.44
717
4.5
1.59
734
4
B
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
0.67
0.74
0.81
0.87
0.94
1.01
642
676
709
741
771
801
2.5
1.5
4.5
4
3.5
2.5
0.74
0.82
0.89
0.98
1.06
1.16
654
687
719
750
780
809
2
1
4.5
4
3
2.5
0.82
0.90
0.98
1.06
1.15
1.24
666
698
729
759
789
817
1.5
1
4
3.5
3
2.5
0.91
0.99
1.07
1.16
1.24
1.33
677
709
739
769
797
825
1.5
4.5
4
3.5
3
2.5
1.01
1.09
1.17
1.26
1.35
1.44
689
720
750
778
806
833
1
4.5
4
3
2.5
2
1.12
1.20
1.29
1.37
1.46
1.55
702
732
760
788
816
842
4.5
4
3.5
3
2.5
2
1.24
1.33
1.41
1.50
1.59
1.68
715
744
772
799
826
852
4.5
4
3.5
3
2
1.5
1.38
1.46
1.55
1.63
1.73
1.82
729
757
785
811
837
863
4
3.5
3
2.5
2
1.5
1.52
1.61
1.69
1.79
1.88
1.98
745
772
798
824
850
875
4
3.5
3
2.5
2
3.5
1.68
1.77
1.86
1.95
2.05
2.14
761
787
813
839
864
888
3.5
3
2.5
4
3.5
3
A
LEGEND
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Standard Motor
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
1.1
1.08
830
2
1.22
837
2
1.34
844
2
1.42
852
1.5
1.53
860
1.5
1.65
868
1.5
1.78
878
1
1.92
888
1
2.07
899
3
2.25
912
2.5
1.2
1.15
857
1.5
1.29
864
1.5
1.43
871
1.5
1.50
878
1
1.63
886
1
1.75
894
1
1.88
902
0.5
2.02
912
2.5
2.17
923
2.5
2.35
936
2
1.3
1.21
884
1
1.36
891
1
1.51
897
1
1.58
904
0.5
1.69
911
0.5
1.85
918
0.5
1.98
927
2.5
2.12
936
2
2.28
947
2
2.45
959
2
E
1.4
1.28
910
0.5
1.43
916
0.5
1.58
922
0.5
1.67
929
0
1.74
935
0
1.95
943
2
2.08
951
2
2.23
960
2
2.39
970
1.5
2.56
981
1.5
1.5
1.35
936
0
1.50
941
0
1.65
947
0
1.75
953
2
1.80
959
2
2.06
966
1.5
2.19
974
1.5
2.34
983
1.5
2.49
993
1
2.67
1003
1
C
4. ISO/ARI rating point with standard static sheave and drive at 2 turns open
(4000 cfm at 0.6 in. wg ESP Wet Coil). Other speeds require field
selection.
5. For applications requiring higher static pressures, contact your local
representative.
6. Performance data does not include drive losses and is based on sea level
conditions.
7. Do not operate in gray region.
8. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v
for 208-230-v units.
9. For wet coil performance first calculate the face velocity of the air coil (Face
Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of
200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg,
400 fpm by 0.12 in. wg and 500 fpm by 0.16 in. wg.
NOTES:
1. Bold numbers require 2 horsepower motor.
2. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from the
position shown above.
3. Units factory shipped with standard static sheave and drive at 2.5 turns
open (4000 cfm at 0.5 in. wg ESP Wet Coil). Other speeds require field
selection.
25
Table 5G — 50VQL160 Blower Performance Data
4000
4400
4800
5200
5600
6000
6400
RATED
CFM
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.71
600
3
0.89
633
2
1.11
670
1.5
1.36
708
0.5
1.64
744
4.5
1.95
777
4
2.27
807
3.5
0.1
0.79
641
2
0.97
671
1.5
1.20
705
1
1.45
741
4.5
1.74
775
4
2.05
807
3.5
2.38
835
3
B
0.2
0.86
681
1
1.06
708
0.5
1.28
740
4.5
1.55
773
4
1.84
806
3.5
2.16
836
3
2.50
862
2.5
0.3
0.94
720
0.5
1.14
745
4.5
1.37
774
4
1.64
805
3.5
1.94
836
3
2.27
865
2
2.61
890
1.5
0.4
1.02
757
4.5
1.22
780
4
1.46
807
3.5
1.74
837
2.5
2.05
866
2
2.38
893
1.5
2.73
917
1
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
1.10 1.18 1.26 1.34
1.43
1.51
794
829
864
898
931
964
3.5
3
2
1.5
1
0.5
1.31 1.40 1.48 1.57
1.66
1.75
814
848
881
913
945
976
3
2.5
2
1.5
0.5
0
1.56 1.65 1.74 1.84
1.93
2.03
840
872
903
934
964
993
2.5
2
1.5
1
0.5
3
1.84 1.94 2.04 2.14
2.24
2.34
867
898
927
957
985
1013
2
1.5
1
0.5
0
3
2.15 2.26 2.36 2.47
2.58
2.69
895
924
952
980
1007
1034
1.5
1
0.5
0
3
2.5
2.49 2.60 2.71
921
948
975
1
0.5
0
2.85
943
0.5
A
—
—
—
—
—
1.2
1.69
1027
2.5
1.94
1036
2.5
2.23
1051
2
2.55
1069
2
1.3
1.78
1058
2
2.03
1066
2
2.33
1079
2
2.66
1096
1.5
1.4
1.87
1088
1.5
2.13
1095
1.5
2.43
1107
1.5
2.77
1122
1
C
1.5
1.96
1117
1
2.23
1123
1
2.53
1134
1
2.87
1149
0.5
3. ISO/ARI rating point with standard static sheave and drive at 2 turns
open (5200 cfm at 0.48 in. wg ESP Wet Coil). Other speeds require
field selection.
4. For applications requiring higher static pressures, contact your local
representative.
5. Performance data does not include drive losses and is based on sea
level conditions.
6. Do not operate in gray region.
7. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208 v for 208-230-v units.
8. For wet coil performance first calculate the face velocity of the air coil
(Face Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of 200 fpm reduce the static capability by 0.03 in. wg, 300 fpm by
0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by 0.16 in. wg.
LEGEND
A
B
C
BHP
RPM
1.1
1.60
996
3
1.85
1006
3
2.13
1022
2.5
2.45
1041
2.5
2.80
1061
2
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Standard Motor
Brake Horsepower
Revolutions Per Minute
NOTES:
1. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from
the position shown above.
2. Units factory shipped with standard static sheave and drive at 2.5
turns open (5200 cfm at 0.4 in. wg ESP Wet Coil). Other speeds
require field selection.
Table 5H — 50VQL200 Blower Performance Data
5400
5800
6200
6600
7000
7400
7800
8200
A
B
E
BHP
RPM
—
—
—
—
—
RATED
CFM
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.82
550
4.5
0.93
570
4
0.1
0.2
0.68
549
4.5
0.78
566
4
0.89
584
3.5
1.00
602
3.5
0.58
553
4.5
0.66
569
4
0.75
584
3.5
0.85
600
3.5
0.96
616
3
1.08
633
2.5
0.3
0.50
561
4.5
0.57
576
4
0.64
590
3.5
0.73
604
3
0.82
618
3
0.92
633
2.5
1.03
648
2
1.15
664
1.5
0.4
0.56
599
3.5
0.63
613
3
0.71
626
2.5
0.80
638
2.5
0.89
651
2
0.99
665
1.5
1.10
679
1.5
1.23
693
1
B
EXTERNAL STATIC PRESSURE (in. wg)
0.5
0.6
0.7
0.8
0.9
1.0
0.63
0.70
0.77
0.84
0.90
0.97
635
670
704
736
767
797
2.5
1.5
4.5
4
3.5
3
0.70
0.78
0.86
0.92
0.99
1.06
648
682
714
746
776
805
2
1
4.5
4
3
2.5
0.78
0.86
0.94
1.02
1.10
1.19
660
693
724
755
784
813
2
1
4.5
3.5
3
2.5
0.87
0.94
1.02
1.11
1.19
1.28
671
703
734
764
793
821
1.5
4.5
4
3.5
3
2.5
0.96
1.04
1.12
1.21
1.28
1.36
683
714
744
773
802
829
1
4.5
4
3.5
2.5
2
1.07
1.15
1.23
1.31
1.40
1.48
696
726
755
783
811
838
1
4
3.5
3
2.5
4
1.18
1.26
1.35
1.43
1.52
1.62
709
738
766
794
821
847
4.5
4
3.5
3
4
4
1.31
1.39
1.48
1.56
1.66
1.75
722
751
778
805
832
857
4.5
3.5
5
4.5
4
3.5
A
LEGEND
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
1.1
1.03
826
2
1.13
833
2
1.27
841
2
1.36
848
2
1.44
856
1.5
1.55
864
3.5
1.71
873
3.5
1.85
883
3
1.2
1.10
854
1.5
1.20
861
1.5
1.35
868
1.5
1.45
874
3.5
1.52
882
3
1.63
889
3
1.81
898
3
1.3
1.17
881
1
1.26
887
1
1.43
894
1
1.53
900
3
1.59
907
2.5
1.70
914
2.5
E
1.4
1.23
907
0.5
1.33
913
0.5
1.52
919
2.5
1.62
925
2.5
1.67
932
2
1.78
939
2
1.5
1.30
933
0
1.40
938
0
1.60
944
2
1.70
950
2
1.75
956
2
5. ISO/ARI rating point with standard static sheave and drive at 3.5
turns open (7000 cfm at 0.45 in. wg ESP Wet Coil). Other speeds
require field selection.
6. For applications requiring higher static pressures, contact your local
representative.
7. Performance data does not include drive losses and is based on
sea level conditions.
8. Do not operate in gray region.
9. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e.,
208 v for 208-230-v units.
10. For wet coil performance first calculate the face velocity of the air
coil (Face Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for
velocities of 200 fpm reduce the static capability by 0.03 in. wg,
300 fpm by 0.08 in. wg, 400 fpm by 0.12 in. wg and 500 fpm by
0.16 in. wg.
NOTES:
1. Bold numbers require 2 horsepower motor.
2. Values are per blower and motor; 2 blowers and motors required.
3. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn
from the position shown above.
4. Units factory shipped with standard static sheave and drive at 2.5
turns open 7000 cfm at 0.7 in. wg ESP Wet Coil). Other speeds
require field selection.
26
Table 5I — 50VQL240 Blower Performance Data
5600
6000
6400
6800
7200
7600
8000
8400
8800
9200
A
B
C
E
BHP
RPM
—
—
—
—
—
—
RATED
CFM
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
0.87
560
4.5
0.99
580
4
1.13
601
3.5
1.27
623
2.5
0.1
0.2
0.73
557
4.5
0.83
575
4
0.94
593
3.5
1.07
611
3
1.20
631
2.5
1.35
652
2
0.54
546
4.5
0.62
561
4.5
0.70
576
4
0.80
592
3.5
0.90
608
3
1.01
624
2.5
1.14
642
2.5
1.28
660
2
1.43
680
1.5
B
0.3
0.53
569
4
0.60
583
4
0.68
597
3.5
0.77
611
3
0.87
625
2.5
0.97
640
2.5
1.09
656
2
1.22
672
1.5
1.36
689
1
1.51
707
4.5
0.4
0.60
606
3
0.67
619
3
0.75
632
2.5
0.84
645
2
0.94
658
2
1.05
672
1.5
1.16
686
1
1.29
701
4.5
1.44
717
4.5
1.59
734
4
0.5
0.67
642
2.5
0.74
654
2
0.82
666
1.5
0.91
677
1.5
1.01
689
1
1.12
702
4.5
1.24
715
4.5
1.38
729
4
1.52
745
4
1.68
761
3.5
EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.7
0.8
0.9
1.0
0.74
0.81
0.87
0.94
1.01
676
709
741
771
801
1.5
4.5
4
3.5
2.5
0.82
0.89
0.98
1.06
1.16
687
719
750
780
809
1
4.5
4
3
2.5
0.90
0.98
1.06
1.15
1.24
698
729
759
789
817
1
4
3.5
3
2.5
0.99
1.07
1.16
1.24
1.33
709
739
769
797
825
4.5
4
3.5
3
2.5
1.09
1.17
1.26
1.35
1.44
720
750
778
806
833
4.5
4
3
2.5
2
1.20
1.29
1.37
1.46
1.55
732
760
788
816
842
4
3.5
3
2.5
2
1.33
1.41
1.50
1.59
1.68
744
772
799
826
852
4
3.5
3
2
1.5
1.46
1.55
1.63
1.73
1.82
757
785
811
837
863
3.5
3
2.5
2
1.5
1.88
1.98
1.61
1.69
1.79
850
875
772
798
824
2
3.5
3.5
3
2.5
1.86
1.95
2.05
2.14
1.77
813
839
864
888
787
2.5
4
3.5
3
3
A
1.1
1.08
830
2
1.22
837
2
1.34
844
2
1.42
852
1.5
1.53
860
1.5
1.65
868
1.5
1.78
878
1
1.92
888
1
2.07
899
3
2.25
912
2.5
1.2
1.15
857
1.5
1.29
864
1.5
1.43
871
1.5
1.50
878
1
1.63
886
1
1.75
894
1
1.88
902
0.5
2.02
912
2.5
2.17
923
2.5
2.35
936
2
E
1.3
1.21
884
1
1.36
891
1
1.51
897
1
1.58
904
0.5
1.69
911
0.5
1.85
918
0.5
1.98
927
2.5
2.12
936
2
2.28
947
2
2.45
959
2
1.4
1.28
910
0.5
1.43
916
0.5
1.58
922
0.5
1.67
929
0
1.74
935
0
1.95
943
2
2.08
951
2
2.23
960
2
2.39
970
1.5
2.56
981
1.5
1.5
1.35
936
0
1.50
941
0
1.65
947
0
1.75
953
2
1.80
959
2
2.06
966
1.5
2.19
974
1.5
2.34
983
1.5
2.49
993
1
2.67
1003
1
C
4. Units factory shipped with standard static sheave and drive at 2.5 turns open
(8000 cfm at 0.5 in. wg ESP Wet Coil). Other speeds require field selection.
5. ISO/ARI rating point with standard static sheave and drive at 2 turns open
(8000 cfm at 0.6 in. wg ESP Wet Coil). Other speeds require field selection.
6. For applications requiring higher static pressures, contact your local
representative.
7. Performance data does not include drive losses and is based on sea level
conditions.
8. Do not operate in gray region.
9. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v for
208-230-v units.
10. For wet coil performance first calculate the face velocity of the air coil (Face
Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of 200 fpm
reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg, 400 fpm by
0.12 in. wg and 500 fpm by 0.16 in. wg.
LEGEND
Standard Static Sheave/Standard Motor
Low-Static Sheave/Standard Motor
High-Static Sheave/Standard Motor
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
NOTES:
1. Bold numbers require 3 horsepower motor.
2. Values are per blower and motor; 2 blower and motors required.
3. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from the position shown above.
Table 5J — 50VQL300 Blower Performance Data
RATED
CFM
7,400
7,800
8,200
8,600
9,000
9,400
9,800
10,200
10,600
A
C
BHP
RPM
—
—
—
—
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
BHP
RPM
Turns Open
0.0
1.84
757
4.5
2.04
779
4
2.26
801
3.5
0.1
1.74
761
4.5
1.93
783
4
2.14
804
3.5
2.36
825
3
0.2
1.64
766
4.5
1.83
787
4
2.02
808
3.5
2.23
829
3
2.45
849
2.5
0.3
0.4
1.39
749
4.5
1.55
771
4
1.73
792
3.5
1.92
813
3
2.12
833
2.5
2.33
853
2.5
2.55
873
2
1.31
755
4.5
1.47
777
4
1.64
798
3.5
1.82
818
3
2.01
838
2.5
2.21
858
2
2.43
877
1.5
2.65
896
1.5
0.5
1.25
761
4.5
1.40
783
4
1.56
804
3.5
1.73
824
3
1.91
843
2.5
2.10
863
2
2.31
882
1.5
2.53
901
1
2.76
919
1
EXTERNAL STATIC PRESSURE (in. wg)
0.6
0.7
0.8
0.9
1.0
1.33
1.42
1.52
1.61
1.71
789
817
843
869
895
3.5
3
2.5
2
1.5
1.49
1.58
1.67
1.77
1.87
810
837
862
888
913
3
2.5
2
1.5
1
1.65
1.74
1.84
1.94
2.04
830
856
881
906
930
3
2
1.5
1
0.5
1.82
1.92
2.02
2.12
2.22
849
875
899
923
947
2.5
2
1
0.5
0
2.01
2.11
2.21
2.31
2.41
868
893
917
941
964
2
1.5
1
0.5
2.5
2.20
2.30
2.41
2.51
2.62
887
911
935
958
980
1.5
1
0.5
0
2.5
2.41
2.51
2.62
2.72
2.83
906
929
952
974
996
1
0.5
0
2.5
2
2.63
2.73
924
947
0.5
0
2.86
942
0
A
1.1
1.81
920
0.5
1.97
937
0.5
2.15
954
0
2.33
970
2.5
2.52
986
2
2.73
1002
2
1.2
1.92
944
0
2.08
961
0
2.25
977
2.5
2.44
993
2
2.63
1008
1.5
2.84
1024
1.5
1.3
2.03
968
2.5
2.19
984
2.5
2.37
1000
2
2.55
1015
1.5
2.75
1030
1
C
1.4
2.14
991
2
2.30
1007
1.5
2.48
1022
1.5
2.67
1037
1
1.5
2.25
1014
1.5
2.42
1029
1
2.60
1044
1
2.78
1058
0.5
4. ISO/ARI rating point with standard static sheave and drive at 2 turns open
(9000 cfm at 0.42 in. wg ESP Wet Coil). Other speeds require field selection.
5. For applications requiring higher static pressures, contact your local representative.
6. Performance data does not include drive losses and is based on sea level
conditions.
7. Do not operate in gray region.
8. All airflow is rated at lowest voltage if unit is dual voltage rated, i.e., 208 v for
208-230-v units.
9. For wet coil performance first calculate the face velocity of the air coil (Face
Velocity [fpm] = Airflow [cfm]/Face Area [sq ft]). Then for velocities of 200 fpm
reduce the static capability by 0.03 in. wg, 300 fpm by 0.08 in. wg, 400 fpm by
0.12 in. wg and 500 fpm by 0.16 in. wg.
LEGEND
Standard Static Sheave/Standard Motor
High-Static Sheave/Large Motor
Brake Horsepower
Revolutions Per Minute
NOTES:
1. Values are per blower and motor; 2 blower and motors required.
2. Due to alternate sheaves, ‘Turns Open’ may vary within ±0.5 turn from the position shown above.
3. Units factory shipped with standard static sheave and drive at 2.5 turns open
(9000 cfm at 0.4 in. wg ESP Wet Coil). Other speeds require field selection.
27
Step 9 — Low Voltage Wiring
AIR COIL — To obtain maximum performance, the air coil
should be cleaned before starting the unit. A ten percent solution of dishwasher detergent and water is recommended for
both sides of the coil. Rinse thoroughly with water.
THERMOSTAT CONNECTIONS — The thermostat should
be wired directly to the Aquazone™ control board. See
Fig. 8A-11.
WATER FREEZE PROTECTION — The Aquazone control
allows the field selection of source fluid freeze protection
points through jumpers. The factory setting of jumper JW3
(FP1) is set for water at 30 F. In earth loop applications, jumper
JW3 should be clipped to change the setting to 13 F when
using antifreeze in colder earth loop applications. See Fig. 12.
AIR COIL FREEZE PROTECTION — The air coil freeze
protection jumper JW2 (FP2) is factory set for 30 F and should
not need adjusting.
ACCESSORY CONNECTIONS — Terminal labeled A on
the control is provided to control accessory devices such as
water valves, electronic air cleaners, humidifiers, etc. This signal operates with the compressor terminal. See Fig. 13. Refer
to the specific unit wiring schematic for details.
NOTE: The A terminal should only be used with 24 volt
signals — not line voltage signals.
WATER SOLENOID VALVES — Water solenoid valves may
be used on variable flow systems and ground water installations. A typical well water control valve wiring which can
limit waste water in a lockout condition is shown in Fig. 13. A
slow closing valve may be required to prevent water hammer.
When using a slow closing valve, special wiring conditions
need to be considered. The valve takes approximately 60 seconds to open (very little water will flow before 45 seconds) and
it activates the compressor only after the valve is completely
opened by closing its end switch. When wired as shown, the
valve will have the following operating characteristics:
1. Remain open during a lockout.
2. Draw approximately 25 to 35 VA through the “Y” signal
of the thermostat.
FIELD SELECTABLE INPUTS
Jumpers and DIP (dual in-line package) switches on the
control board are used to customize unit operation and can be
configured in the field.
IMPORTANT: Jumpers and DIP switches should only be
clipped when power to control board has been turned off.
C Control Jumper Settings (See Fig. 8A, 9A,
and 10A)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,
DO NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
AIR COIL FREEZE PROTECTION (FP2) LIMIT SETTING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT
clip the jumper. To select 10 F as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 1 (JW1-AL2
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R) or
to remain as a dry contact (no connection). To connect AL2 to
R, do not clip the jumper. To set as dry contact, clip the jumper.
C Control DIP Switches — The C Control has 1 DIP
switch block with five switches. See Fig. 8A, 9A, and 10A.
PERFORMANCE MONITOR (PM) — DIP switch 1 will
enable or disable this feature. To enable the PM, set the switch
to ON. To disable the PM, set the switch to OFF.
STAGE 2 — DIP switch 2 will enable or disable compressor
delay. Set DIP switch to OFF for stage 2 in which the compressor will have a 3-second delay before energizing.
NOTE: The alarm relay will not cycle during Test mode if
switch is set to OFF, stage 2.
DIP SWITCH 3 — not used.
DIP SWITCH 4 — not used.
DIP SWITCH 5 — DIP switch 5 is used to initiate 1 or 3 tries
for the FP1 fault. If water freeze protection for the water coil
then DIP switch 5 can be set to lockout on the FP1 fault after
one try.
IMPORTANT: This can overheat the anticipators of
electromechanical thermostats. Only use relay based
electronic thermostats.
PRE-START-UP
System Checkout — When the installation is complete,
follow the System Checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor and voltage is balanced
for 3 phase units.
2. Fuses, breakers and wire are correct size.
3. Low voltage wiring is complete.
4. Piping and system flushing is complete.
5. Air is purged from closed loop system.
6. System is balanced as required. Monitor if necessary.
7. Isolation valves are open.
8. Water control valves or loop pumps are wired.
9. Condensate line is open and correctly pitched.
10. Transformer switched to lower voltage tap if necessary.
11. Blower rotates freely — shipping support is removed.
12. Blower speed is on correct setting.
13. Air filter is clean and in position.
14. Service/access panels are in place.
15. Return air temperature is 40 to 80 F for heating and 50 to
110 F for cooling.
16. Air coil is clean.
17. Control field selected settings are correct.
D Control Jumper Settings (See Fig. 8B, 9B,
and 10B)
WATER COIL FREEZE PROTECTION (FP1) LIMIT
SETTING — Select jumper 3, (JW3-FP1 Low Temp) to
choose FP1 limit of 10 F or 30 F. To select 30 F as the limit,
DO NOT clip the jumper. To select 10 F as the limit, clip the
jumper.
AIR COIL FREEZE PROTECTION (FP2) LIMIT SETTING — Select jumper 2 (JW2-FP2 Low Temp) to choose
FP2 limit of 10 F or 30 F. To select 30 F as the limit, DO NOT
clip the jumper. To select 10 F as the limit, clip the jumper.
ALARM RELAY SETTING — Select jumper 4 (JW4-AL2
Dry) for connecting alarm relay terminal (AL2) to 24 vac (R) or
to remain as a dry contact (no connection). To connect AL2 to
R, do not clip the jumper. To set as dry contact, clip the jumper.
LOW PRESSURE SETTING — The D Control can be configured for Low Pressure Setting (LP). Select jumper 1 (JW1LP Norm Open) for choosing between low pressure input normally opened or closed. To configure for normally closed operation, do not clip the jumper. To configure for normally open
operation, clip the jumper.
28
D Control DIP Switches — The D Control has 2 DIP
switch blocks. Each DIP switch block has 8 switches and is
labeled either S1 or S2 on the circuit board. See Fig. 8B, 9B
and 10B.
DIP SWITCH BLOCK 1 (S1) — This set of switches offers
the following options for D Control configuration:
Performance Monitor (PM) — Set switch 1 to enable or disable performance monitor. To enable the PM, set the switch to
ON. To disable the PM, set the switch to OFF.
Compressor Relay Staging Operation — Switch 2 will enable
or disable compressor relay staging operation. The compressor
relay can be set to turn on with stage 1 or stage 2 call from the
thermostat. This setting is used with dual stage units (units with
2 compressors and 2 D controls) or in master/slave applications.
In master/slave applications, each compressor and fan will stage
according to its switch 2 setting. If switch is set to stage 2, the
compressor will have a 3-second delay before energizing during
stage 2 demand.
NOTE: If DIP switch is set for stage 2, the alarm relay will not
cycle during Test mode.
Heating/Cooling Thermostat Type — Switch 3 provides selection of thermostat type. Heat pump or heat/cool thermostats
can be selected. Select OFF for heat/cool thermostats. When in
heat/cool mode, Y1 is used for cooling stage 1, Y2 is used for
cooling stage 2, W1 is used for heating stage 1 and O/W2 is
used for heating stage 2. Select ON for heat pump applications.
In heat pump mode, Y1 used is for compressor stage 1, Y2 is
used for compressor stage 2, W1 is used for heating stage 3 or
emergency heat, and O/W2 is used for RV (heating or cooling)
depending upon switch 4 setting.
O/B Thermostat Type — Switch 4 provides selection for heat
pump O/B thermostats. O is cooling output. B is heating output. Select ON for heat pumps with O output. Select OFF for
heat pumps with B output.
Dehumidification Fan Mode — Switch 5 provides selection
of normal or dehumidification fan mode. Select OFF for dehumidification mode. The fan speed relay will remain OFF during cooling stage 2. Select ON for normal mode. The fan speed
relay will turn on during cooling stage 2 in normal mode.
Switch 6 — Not used.
Boilerless Operation — Switch 7 provides selection of boilerless operation and works in conjunction with switch 8. In
boilerless operation mode, only the compressor is used for
heating when FP1 is above the boilerless changeover temperature set by switch 8 below. Select ON for normal operation or
select OFF for boilerless operation.
Boilerless Changeover Temperature — Switch 8 on S1 provides selection of boilerless changeover temperature set point.
Select OFF for set point of 50 F or select ON for set point
of 40 F.
If switch 8 is set for 50 F, then the compressor will be used
for heating as long as the FP1 is above 50 F. The compressor
will not be used for heating when the FP1 is below 50 F and the
compressor will operates in emergency heat mode, staging on
EH1 and EH2 to provide heat. If a thermal switch is being used
instead of the FP1 thermistor, only the compressor will be used
for heating mode when the FP1 terminals are closed. If the FP1
terminals are open, the compressor is not used and the control
goes into emergency heat mode.
DIP SWITCH BLOCK 2 (S2) — This set of DIP switches is
used to configure accessory relay options. See Fig. 8B, 9B and
10B.
Switches 1 to 3 — These DIP switches provide selection of
Accessory 1 relay options. See Table 6 for DIP switch
combinations.
Switches 4 to 6 — These DIP switches provide selection
of Accessory 2 relay options. See Table 7 for DIP switch
combinations.
NOTE: Low voltage connector may be removed for easy installation.
Fig. 11 — Low Voltage Field Wiring
AQUAZONE CONTROL (C Control Shown)
Fig. 12 — Typical Aquazone™ Control Board
Jumper Locations
Terminal Strip P2
C
24 VAC
Typical
Water
Valve
A
Fig. 13 — Typical Aquazone Accessory Wiring
(Control D Shown)
29
Table 6 — DIP Switch Block S2 —
Accessory 1 Relay Options
ACCESSORY 1
RELAY OPTIONS
Cycle with Fan
Digital NSB
Water Valve — Slow Opening
OAD
To avoid equipment damage, DO NOT leave system filled
in a building without heat during the winter unless antifreeze is added to system water. Condenser coils never
fully drain by themselves and will freeze unless winterized
with antifreeze.
DIP SWITCH POSITION
1
2
3
On
On
On
Off
On
On
On
Off
On
On
On
Off
START-UP
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
Use the procedure outlined below to initiate proper unit
start-up.
NOTE: This equipment is designed for indoor installation only.
NOTE: All other DIP switch combinations are invalid.
Operating Limits
Table 7 — DIP Switch Block S2 —
Accessory 2 Relay Options
ACCESSORY 2
RELAY OPTIONS
Cycle with Fan
Digital NSB
Water Valve — Slow Opening
OAD
ENVIRONMENT — This equipment is designed for indoor
installation ONLY. Extreme variations in temperature, humidity and corrosive water or air will adversely affect the unit performance, reliability and service life.
POWER SUPPLY — A voltage variation of ± 10% of nameplate utilization voltage is acceptable.
UNIT STARTING CONDITIONS — All units start and operate in an ambient of 45 F with entering air at 40 F, entering
water at 20 F and with both air and water at the flow rates used.
NOTE: These operating conditions are not normal or continuous operating conditions. It is assumed that such a start-up is
for the purpose of bringing the building space up to occupancy
temperature.
DIP SWITCH POSITION
4
5
6
On
On
On
Off
On
On
On
Off
On
On
On
Off
LEGEND
NSB — Night Setback
OAD — Outside Air Damper
NOTE: All other switch combinations are invalid.
Auto Dehumidification Mode or High Fan Mode — Switch 7
provides selection of auto dehumidification fan mode or high
fan mode. In auto dehumidification fan mode the fan speed
relay will remain off during cooling stage 2 if terminal H is
active. In high fan mode, the fan enable and fan speed relays
will turn on when terminal H is active. Set the switch to ON for
auto dehumidification fan mode or to OFF for high fan mode.
Switch 8 — Not used.
When the disconnect switch is closed, high voltage is
present in some areas of the electrical panel. Exercise
caution when working with the energized equipment.
Start Up System
1.
2.
3.
4.
Restore power to system.
Turn thermostat fan position to ON. Blower should start.
Balance airflow at registers.
Adjust all valves to the full open position and turn on the
line power to all heat pump units.
5. Operate unit in the cooling cycle. Room temperature
should be approximately 45 to 100 F dry bulb. Loop
water temperature entering the heat pumps should be
between 40 and 90 F.
NOTE: Three factors determine the operating limits of a
unit: (1) entering air temperature, (2) water temperature and
(3) ambient temperature. Whenever any of these factors are
at a minimum or maximum level, the other two factors must
be at a normal level to ensure proper unit operation. See
Table 8.
D Control Accessory Relay Configurations —
The following accessory relay settings are applicable for both
D controls only:
CYCLE WITH FAN — In this configuration, the relay will be
ON any time the Fan Enable relay is on.
CYCLE WITH COMPRESSOR — In this configuration, the
relay will be ON any time the Compressor relay is on.
DIGITAL NIGHT SET BACK (NSB) — In this configuration, the relay will be ON if the NSB input is connected to
ground C.
NOTE: If there are no relays configured for digital NSB, then
the NSB and OVR inputs are automatically configured for
mechanical operation.
MECHANICAL NIGHT SET BACK — When NSB input is
connected to ground C, all thermostat inputs are ignored. A
thermostat set back heating call will then be connected to the
OVR input. If OVR input becomes active, then the D control
will enter Night Low Limit (NLL) staged heating mode. The
NLL staged heating mode will then provide heating during the
NSB period.
WATER VALVE (SLOW OPENING) — If relay is configured for Water Valve (slow opening), the relay will start 60 seconds prior to starting compressor relay.
OUTSIDE AIR DAMPER (OAD) — If relay is configured
for OAD, the relay will normally be ON any time the Fan
Enable relay is energized. The relay will not start for 30 minutes following a return to normal mode from NSB, when NSB
is no longer connected to ground C. After 30 minutes, the relay
will start if the Fan Enable is set to ON.
Table 8 — 50HQL,VQL Units
Operating Limits
AIR LIMITS
Min. Ambient Air
Rated Ambient Air
Max. Ambient Air
Min. Ent. Air
Normal Entering Air db/wb
Max. Entering Air db/wb
WATER LIMITS
Min. Entering Water
Normal Entering Water
Max. Entering Water
COOLING (F)
45
80
100
50
75/63-80/67
110/83
HEATING (F)
45
70
85
40
70
80
*30
40-90
110
45 (*20)
40-90
90
LEGEND
db — Dry Bulb
wb — Wet Bulb
*With antifreeze, optional extended range insulation and low temperature cutout jumper clipped for antifreeze.
30
Scroll Compressor Rotation — It is important to be
An alternative method is to install a flow control device.
These devices are typically an orifice of plastic material designed to allow a specified flow rate that are mounted on the
outlet of the water control valve. Occasionally these valves
produce a velocity noise that can be reduced by applying some
back pressure. To accomplish this, slightly close the leaving
isolation valve of the well water setup.
certain compressor is rotating in the proper direction. To
determine whether or not compressor is rotating in the proper
direction:
1. Connect service gages to suction and discharge pressure
fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Turn off power to the unit. Install disconnect tag.
2. Reverse any two of the unit power leads.
3. Reapply power to the unit and verify pressures are correct.
The suction and discharge pressure levels should now move
to their normal start-up levels.
When the compressor is rotating in the wrong direction, the
unit makes an elevated level of noise and does not provide
cooling.
After a few minutes of reverse operation, the scroll compressor internal overload protection will open, thus activating
the unit lockout. This requires a manual reset. To reset, turn the
thermostat on and then off.
NOTE: There is a 5-minute time delay before the compressor
will start.
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position before flushing system.
Flushing — Once the piping is complete, final purging and
loop charging is needed. A flush cart pump of at least 1.5 hp is
needed to achieve adequate flow velocity in the loop to purge
air and dirt particles from the loop. Flush the loop in both directions with a high volume of water at a high velocity. Follow the
steps below to properly flush the loop:
1. Verify power is off.
2. Fill loop with water from hose through flush cart before
using flush cart pump to ensure an even fill. Do not allow
the water level in the flush cart tank to drop below the
pump inlet line to prevent air from filling the line.
3. Maintain a fluid level in the tank above the return tee to
avoid air entering back into the fluid.
4. Shutting off the return valve that connects into the flush
cart reservoir will allow 50 psi surges to help purge air
pockets. This maintains the pump at 50 psi.
5. To purge, keep the pump at 50 psi until maximum pumping pressure is reached.
6. Open the return valve to send a pressure surge through
the loop to purge any air pockets in the piping system.
7. A noticeable drop in fluid level will be seen in the flush
cart tank. This is the only indication of air in the loop.
NOTE: If air is purged from the system while using a 10 in.
PVC flush tank, only a 1 to 2 in. level drop will be noticed
since liquids are incompressible. If the level drops more than
this, flushing should continue since air is still being
compressed in the loop. If level is less than 1 to 2 in., reverse
the flow.
8. Repeat this procedure until all air is purged.
9. Restore power.
Antifreeze may be added before, during or after the flushing
process. However, depending on when it is added in the
process, it can be wasted. Refer to the Antifreeze section for
more detail.
Loop static pressure will fluctuate with the seasons. Pressures will be higher in the winter months than during the warmer months. This fluctuation is normal and should be considered
when charging the system initially. Run the unit in either heating or cooling for several minutes to condition the loop to a
homogenous temperature.
When complete, perform a final flush and pressurize the
loop to a static pressure of 40 to 50 psi for winter months or 15
to 20 psi for summer months.
After pressurization, be sure to remove the plug from the
end of the loop pump motor(s) to allow trapped air to be
discharged and to ensure the motor housing has been flooded.
Be sure the loop flow center provides adequate flow through
the unit by checking pressure drop across the heat exchanger.
Unit Start-Up Cooling Mode
1. Adjust the unit thermostat to the warmest position.
Slowly reduce the thermostat position until the compressor activates.
2. Check for cool air delivery at unit grille a few minutes
after the unit has begun to operate.
3. Verify that the compressor is on and that the water flow
rate is correct by measuring pressure drop through the
heat exchanger using P/T plugs. Check the elevation and
cleanliness of the condensate lines; any dripping could be
a sign of a blocked line. Be sure the condensate trap includes a water seal.
4. Check the temperature of both supply and discharge
water.
5. Air temperature drop across the coil should be checked
when compressor is operating. Air temperature drop
should be between 15 and 25 F.
Unit Start-Up Heating Mode
NOTE: Operate the unit in heating cycle after checking the
cooling cycle. Allow five minutes between tests for the pressure or reversing valve to equalize.
1. Turn thermostat to lowest setting and set thermostat
switch to HEAT position.
2. Slowly turn the thermostat to a higher temperature until
the compressor activates.
3. Check for warm air delivery at the unit grille within a few
minutes after the unit has begun to operate.
4. Check the temperature of both supply and discharge
water.
5. Air temperature rise across the coil should be checked
when compressor is operating. Air temperature rise
should be between 20 and 30 F after 15 minutes at load.
6. Check for vibration, noise and water leaks.
Flow Regulation — Flow regulation can be accomplished by two methods. Most water control valves have a flow
adjustment built into the valve. By measuring the pressure drop
through the unit heat exchanger, the flow rate can be determined. Adjust the water control valve until the flow of 1.5 to
2 gpm is achieved. Since the pressure constantly varies, two
pressure gages may be needed in some applications.
Antifreeze — In areas where entering loop temperatures
drop below 40 F or where piping will be routed through areas
subject to freezing, antifreeze is needed.
31
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
Alcohols and glycols are commonly used as antifreeze
agents. Freeze protection should be maintained to 15 F below
the lowest expected entering loop temperature. For example, if
the lowest expected entering loop temperature is 30 F, the leaving loop temperature would be 22 to 25 F. Therefore, the freeze
protection should be at 15 F (30 F – 15 F = 15 F).
Units with Aquazone™ Complete C Control
STANDBY — Y and W terminals are not active in Standby
mode, however the O and G terminals may be active, depending on the application. The compressor will be off.
COOLING — Y and O terminals are active in Cooling mode.
After power up, the first call to the compressor will initiate a
5 to 80 second random start delay and a 5-minute anti-short
cycle protection time delay. After both delays are complete, the
compressor is energized.
NOTE: On all subsequent compressor calls the random start
delay is omitted.
HEATING STAGE 1 — Terminal Y is active in heating
stage 1. After power up, the first call to the compressor will
initiate a 5 to 80 second random start delay and a 5-minute antishort cycle protection time delay. After both delays are
complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start
delay is omitted.
HEATING STAGE 2 — To enter Stage 2 mode, terminal W
is active (Y is already active). Also, the G terminal must be
active or the W terminal is disregarded. The compressor relay
will remain on and EH1 is immediately turned on. EH2 will
turn on after 10 minutes of continual stage 2 demand.
NOTE: EH2 will not turn on (or if on, will turn off) if FP1 temperature is greater than 45 F and FP2 is greater than 110 F.
EMERGENCY HEAT — In emergency heat mode, terminal
W is active while terminal Y is not. Terminal G must be active
or the W terminal is disregarded. EH1 is immediately turned
on. EH2 will turn on after 5 minutes of continual emergency
heat demand.
IMPORTANT: All alcohols should be pre-mixed and
pumped from a reservoir outside of the building or introduced under water level to prevent alcohols from fuming.
Calculate the total volume of fluid in the piping system. See
Table 9. Use the percentage by volume in Table 10 to determine the amount of antifreeze to use. Antifreeze concentration
should be checked from a well mixed sample using a hydrometer to measure specific gravity.
FREEZE PROTECTION SELECTION — The 30 F FP1
factory setting (water) should be used to avoid freeze damage
to the unit.
Once antifreeze is selected, the JW3 jumper (FP1) should
be clipped on the control to select the low temperature (antifreeze 13 F) set point to avoid nuisance faults.
Table 9 — Approximate Fluid Volume (gal.)
per 100 Ft of Pipe
PIPE
Copper
Rubber Hose
Polyethylene
IPS
SCH
SDR
DIAMETER (in.)
1
1.25
1.5
1
3/4 IPS SDR11
1 IPS SDR11
11/4 IPS SDR11
1/ IPS SDR11
2
2 IPS SDR11
11/4 IPS SCH40
11/2 IPS SCH40
2 IPS SCH40
VOLUME (gal.)
4.1
6.4
9.2
3.9
2.8
4.5
8.0
10.9
18.0
8.3
10.9
17.0
Units with Aquazone Deluxe D Control
STANDBY/FAN ONLY — The compressor will be off. The
Fan Enable, Fan Speed, and reversing valve (RV) relays will be
on if inputs are present. If there is a Fan 1 demand, the Fan
Enable will immediately turn on. If there is a Fan 2 demand,
the Fan Enable and Fan Speed will immediately turn on.
NOTE: DIP switch 5 on S1 does not have an effect upon Fan 1
and Fan 2 outputs.
HEATING STAGE 1 — In Heating Stage 1 mode, the Fan
Enable and Compressor relays are turned on immediately.
Once the demand is removed, the relays are turned off and the
control reverts to Standby mode. If there is a master/slave or
dual compressor application, all compressor relays and related
functions will operate per their associated DIP switch 2 setting
on S1.
HEATING STAGE 2 — In Heating Stage 2 mode, the Fan
Enable and Compressor relays are remain on. The Fan Speed
relay is turned on immediately and turned off immediately
once the demand is removed. The control reverts to Heating
Stage 1 mode. If there is a master/slave or dual compressor
application, all compressor relays and related functions will
operate per their associated DIP switch 2 setting on S1.
HEATING STAGE 3 — In Heating Stage 3 mode, the Fan
Enable, Fan Speed and Compressor relays remain on. The EH1
output is turned on immediately. With continuing Heat Stage 3
demand, EH2 will turn on after 10 minutes. EH1 and EH2 are
turned off immediately when the Heating Stage 3 demand is removed. The control reverts to Heating Stage 2 mode.
Output EH2 will be off if FP1 is greater than 45 F AND
FP2 (when shorted) is greater than 110 F during Heating
Stage 3 mode. This condition will have a 30-second recognition time. Also, during Heating Stage 3 mode, EH1, EH2, Fan
Enable, and Fan Speed will be ON if G input is not active.
LEGEND
— Internal Pipe Size
— Schedule
— Standard Dimensional Ratio
NOTE: Volume of heat exchanger is approximately 1.0 gallon.
Table 10 — Antifreeze Percentages by Volume
ANTIFREEZE
Methanol (%)
100% USP Food Grade
Propylene Glycol (%)
MINIMUM TEMPERATURE FOR
FREEZE PROTECTION (F)
10
15
20
25
25
21
16
10
38
30
22
15
Cooling Tower/Boiler Systems — These systems
typically use a common loop maintained at 60 to 90 F. The use
of a closed circuit evaporative cooling tower with a secondary
heat exchanger between the tower and the water loop is recommended. If an open type cooling tower is used continuously,
chemical treatment and filtering will be necessary.
Ground Coupled, Closed Loop and Plateframe
Heat Exchanger Well Systems — These systems allow water temperatures from 30 to 110 F. The external loop
field is divided up into 2 in. polyethylene supply and return
lines. Each line has valves connected in such a way that upon
system start-up, each line can be isolated for flushing using only
the system pumps. Air separation should be located in the piping system prior to the fluid re-entering the loop field.
OPERATION
Power Up Mode — The unit will not operate until all the
inputs, terminals and safety controls are checked for normal
operation.
32
EMERGENCY HEAT — In Emergency Heat mode, the Fan
Enable and Fan Speed relays are turned on. The EH1 output is
turned on immediately. With continuing Emergency Heat demand, EH2 will turn on after 5 minutes. Fan Enable and Fan
Speed relays are turned off after a 60-second delay. The control
reverts to Standby mode.
Output EH1, EH2, Fan Enable, and Fan Speed will be ON if
the G input is not active during Emergency Heat mode.
COOLING STAGE 1 — In Cooling Stage 1 mode, the Fan
Enable, compressor and RV relays are turned on immediately.
If configured as stage 2 (DIP switch set to OFF) then the compressor and fan will not turn on until there is a stage 2 demand.
The Fan Enable and compressor relays are turned off immediately when the Cooling Stage 1 demand is removed. The control reverts to Standby mode. The RV relay remains on until
there is a heating demand. If there is a master/slave or dual
compressor application, all compressor relays and related functions will track with their associated DIP switch 2 on S1.
COOLING STAGE 2 — In Cooling Stage 2 mode, the Fan
Enable, compressor and RV relays remain on. The Fan Speed
relay is turned on immediately and turned off once the Cooling
Stage 2 demand is removed. The control reverts to Cooling
Stage 1 mode. If there is a master/slave or dual compressor application, all compressor relays and related functions will track
with their associated DIP switch 2 on S1.
NIGHT LOW LIMIT (NLL) STAGED HEATING — In NLL
staged Heating mode, the override (OVR) input becomes
active and is recognized as a call for heating and the control
will immediately go into a Heating Stage 1 mode. With an
additional 30 minutes of NLL demand, the control will go into
Heating Stage 2 mode. With another additional 30 minutes of
NLL demand, the control will go into Heating Stage 3 mode.
TEST LED — Test LED will be activated any time the D
control is in Test mode. The Test LED light is yellow.
FAULT LED — Fault LED light is red. The fault LED will
always flash a code representing the last fault in memory. If
there is no fault in memory, the fault LED will flash code 1 on
the and appear as 1 fast flash alternating with a 10-second
pause. See Table 13.
Table 11 — C Control Current LED Status
and Alarm Relay Operations
LED STATUS
DESCRIPTION OF OPERATION
Normal Mode
On
Normal Mode with
PM Warning
Off
C Control is non-functional
Fault Retry
Slow Flash
Over/Under Voltage Shutdown
Fast Flash
Lockout
Flashing Code 1 Test Mode — No fault in memory
Flashing Code 2 Test Mode — HP Fault in memory
Flashing Code 3 Test Mode — LP Fault in memory
Flashing Code 4 Test Mode — FP1 Fault in memory
Flashing Code 5 Test Mode — FP2 Fault in memory
Flashing Code 6 Test Mode — CO Fault in memory
Test Mode — Over/Under
Flashing Code 7
shutdown in memory
Flashing Code 8
Test Mode — PM in memory
Test Mode — FP1/FP2
Flashing Code 9
Swapped fault in memory
CO
FP
HP
LED
LP
PM
SYSTEM TEST
System testing provides the ability to check the control
operation. The control enters a 20-minute Test mode by momentarily shorting the test pins. All time delays are increased
15 times.
—
—
—
—
—
—
ALARM RELAY
Open
Cycle
(closed 5 sec.,
Open 25 sec.)
Open
Open
Open
(Closed after
15 minutes)
Closed
Cycling Code 1
Cycling Code 2
Cycling Code 3
Cycling Code 4
Cycling Code 5
Cycling Code 6
Cycling Code 7
Cycling Code 8
Cycling Code 9
LEGEND
Condensate Overflow
Freeze Protection
High Pressure
Light-Emitting Diode
Low Pressure
Performance Monitor
NOTES:
1. Slow flash is 1 flash every 2 seconds.
2. Fast flash is 2 flashes every 1 second.
3. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a
10-second pause. This sequence will repeat continually until the fault is
cleared.
Test Mode — To enter Test mode on C or D controls, cycle
the power 3 times within 60 seconds. The LED (light-emitting
diode) will flash a code representing the last fault when entering the Test mode. The alarm relay will also power on and off
during Test mode. See Tables 11-13. To exit Test mode, short
the terminals for 3 seconds or cycle the power 3 times within
60 seconds.
NOTE: Deluxe D Control has a flashing code and alarm relay
cycling code that will both have the same numerical label.
For example, flashing code 1 will have an alarm relay cycling
code 1. Code 1 indicates the control has not faulted since the
last power off to power on sequence.
Table 12 — C Control LED Code and
Fault Descriptions
LED
CODE
1
Retry Mode — In Retry mode, the status LED will start to
flash slowly to signal that the control is trying to recover from
an input fault. The control will stage off the outputs and try to
again satisfy the thermostat used to terminal Y. Once the thermostat input calls are satisfied, the control will continue normal
operation.
NOTE: If 3 consecutive faults occur without satisfying the
thermostat input call to terminal Y, the control will go into
lockout mode. The last fault causing the lockout is stored in
memory and can be viewed by entering Test mode.
FAULT
No fault in memory
2
3
High-Pressure Switch
Low-Pressure Switch
4
Freeze Protection Coax
— FP1
5
Freeze Protection Air Coil
— FP2
6
Condensate overflow
7
Over/Under Voltage
(Autoreset) Shutdown
8
PM Warning
9
Aquazone™ Deluxe D Control LED Indicators — There are 3 LED indicators on the D Control:
STATUS LED — Status LED indicates the current status or
mode of the D control. The Status LED light is green.
CO
FP
HP
LED
PM
33
—
—
—
—
—
FP1 and FP2 Thermistors
are swapped
LEGEND
Condensate Overflow
Freeze Protection
High Pressure
Light-Emitting Diode
Performance Monitor
DESCRIPTION
There has been no fault since
the last power-down to power-up
sequence
HP Open Instantly
LP open for 30 continuous seconds before or during a call
(bypassed for first 60 seconds)
FP1 below Temp limit for 30 continuous seconds (bypassed for
first 60 seconds of operation)
FP2 below Temp limit for 30 continuous seconds (bypassed for
first 60 seconds of operation)
Sense overflow (grounded) for
30 continuous seconds
"R" power supply is <19VAC or
>30VAC
Performance Monitor Warning
has occurred.
FP1 temperature is higher than
FP2 in heating/test mode, or FP2
temperature is higher than FP1
in cooling/test mode.
Table 13 — Aquazone™ D Control Current LED Status and Alarm Relay Operations
Normal Mode
STATUS LED
(Green)
On
Normal Mode with PM
On
Off
Flashing Code 8
D Control is non-functional
Test Mode
Night Setback
ESD
Invalid T-stat Inputs
No Fault in Memory
HP Fault
LP Fault
FP1 Fault
FP2 Fault
CO Fault
Over/Under Voltage
HP Lockout
LP Lockout
FP1 Lockout
FP2 Lockout
CO Lockout
Off
—
Flashing Code 2
Flashing Code 3
Flashing Code 4
On
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Slow Flash
Fast Flash
Fast Flash
Fast Flash
Fast Flash
Fast Flash
Off
On
—
—
—
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Flashing Code 7
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
DESCRIPTION
CO
ESD
FP
HP
LP
PM
—
—
—
—
—
—
TEST LED
(Yellow)
Off
FAULT LED (Red)
ALARM RELAY
Flash Last Fault Code in Memory
Open
Cycle (closed 5 sec,
open 25 sec, …)
Open
Cycling Appropriate Code
—
—
—
Open
Open
Open
Open
Open
Open
Open (closed after 15 minutes)
Closed
Closed
Closed
Closed
Closed
LEGEND
Condensate Overflow
Emergency Shutdown
Freeze Protection
High Pressure
Low Pressure
Performance Monitor
NOTES:
1. If there is no fault in memory, the Fault LED will flash code 1.
2. Codes will be displayed with a 10-second Fault LED pause.
3. Slow flash is 1 flash every 2 seconds.
4. Fast flash is 2 flashes every 1 second.
5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a 10-second pause. This sequence will repeat continually
until the fault is cleared.
SERVICE
Inspect heat exchangers regularly, and clean more frequently if the unit is located in a “dirty” environment. The heat
exchanger should be kept full of water at all times. Open loop
systems should have an inverted P trap placed in the discharge
line to keep water in the heat exchanger during off cycles.
Closed loop systems must have a minimum of 15 PSI during
the summer and 40 PSI during the winter.
Check P trap frequently for proper operation.
Perform the procedures outlined below periodically, as
indicated.
IMPORTANT: When a compressor is removed from this
unit, system refrigerant circuit oil will remain in the compressor. To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is removed.
IMPORTANT: All refrigerant discharged from this unit
must be recovered without exception. Technicians must follow industry accepted guidelines and all local, state and federal statutes for the recovery and disposal of refrigerants.
To avoid fouled machinery and extensive unit clean-up,
DO NOT operate units without filters in place. DO NOT
use equipment as a temporary heat source during
construction.
IMPORTANT: To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must only be
serviced by technicians which meet local, state and federal
proficiency requirements.
Condensate Drain Pans — Check condensate drain
IMPORTANT: To prevent injury or death due to electrical
shock or contact with moving parts, open unit disconnect
switch before servicing unit.
Refrigerant System — Verify air and water flow rates
pans for algae growth twice a year. If algae growth is apparent,
consult a water treatment specialist for proper chemical treatment. The application of an algaecide every three months will
typically eliminate algae problems in most locations.
are at proper levels before servicing. To maintain sealed circuitry integrity, do not install service gauges unless unit operation
appears abnormal.
Filters — Filters must be clean for maximum performance.
Inspect filters every month under normal operating conditions.
replace when necessary.
Condensate Drain Cleaning — Clean the drain line
IMPORTANT: Units should never be operated without a filter.
and unit drain pan at the start of each cooling season. Check
flow by pouring water into drain. Be sure trap is filled to maintain an air seal.
Air Coil Cleaning — Remove dirt and debris from evap-
Water Coil — Keep all air out of the water coil. Check
orator coil as required by condition of the coil. Clean coil with
a stiff brush, vacuum cleaner, or compressed air. Use a fin
comb of the correct tooth spacing when straightening mashed
or bent coil fins.
open loop systems to be sure the well head is not allowing air
to infiltrate the water line. Always keep lines airtight.
34
Condenser Cleaning — Water-cooled condensers may
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Sludge build-up may
need to be cleaned in an open water tower system due to
induced contaminants.
Local water conditions may cause excessive fouling or
pitting of tubes. Condenser tubes should therefore be cleaned at
least once a year, or more often if the water is contaminated.
Proper water treatment can minimize tube fouling and
pitting. If such conditions are anticipated, water treatment
analysis is recommended. Refer to the Carrier System Design
Manual, Part 5, for general water conditioning information.
PUMP
GAS VENT
GLOBE
VALVES
SUCTION
SUPPLY
PUMP
SUPPORT
1” PIPE
CONDENSER
TANK
REMOVE WATER
REGULATING VALVE
FINE MESH
SCREEN
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer’s instructions.
RETURN
Fig. 15 — Forced Circulation Method
Clean condensers with an inhibited hydrochloric acid solution. The acid can stain hands and clothing, damage concrete,
and, without inhibitor, damage steel. Cover surroundings to
guard against splashing. Vapors from vent pipe are not harmful,
but take care to prevent liquid from being carried over by the
gases.
Warm solution acts faster, but cold solution is just as effective if applied for a longer period.
GRAVITY FLOW METHOD — Do not add solution faster
than vent can exhaust the generated gases.
When condenser is full, allow solution to remain overnight,
then drain condenser and flush with clean water. Follow acid
manufacturer’s instructions. See Fig. 14.
FORCED CIRCULATION METHOD — Fully open vent
pipe when filling condenser. The vent may be closed when
condenser is full and pump is operating. See Fig. 15.
Regulate flow to condenser with a supply line valve. If
pump is a nonoverloading type, the valve may be fully closed
while pump is running.
For average scale deposit, allow solution to remain in condenser overnight. For heavy scale deposit, allow 24 hours.
Drain condenser and flush with clean water. Follow acid manufacturer’s instructions.
FILL CONDENSER WITH
CLEANING SOLUTION. DO
NOT ADD SOLUTION
MORE RAPIDLY THAN
VENT CAN EXHAUST
GASES CAUSED BY
CHEMICAL ACTION.
PRIMING
CONN.
Checking System Charge — Units are shipped with
full operating charge. If recharging is necessary:
1. Insert thermometer bulb in insulating rubber sleeve on
liquid line near filter drier. Use a digital thermometer for
all temperature measurements. DO NOT use a mercury
or dial-type thermometer.
2. Connect pressure gage to discharge line near compressor.
3. After unit conditions have stabilized, read head pressure
on discharge line gage.
NOTE: Operate unit a minimum of 15 minutes before
checking charge.
4. From standard field-supplied Pressure-Temperature chart
for R-22, find equivalent saturated condensing
temperature.
5. Read liquid line temperature on thermometer; then
subtract from saturated condensing temperature. The difference equals subcooling temperature.
Refrigerant Charging
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system —
this can cause compressor flooding.
NOTE: Do not vent or depressurize unit refrigerant to atmosphere. Remove and reclaim refrigerant following accepted
practices.
PAIL
Air Coil Fan Motor Removal
FUNNEL
1”
PIPE
VENT
PIPE
Before attempting to remove fan motors or motor mounts,
place a piece of plywood over evaporator coils to prevent
coil damage.
5’ APPROX
3’ TO 4’
Motor power wires need to be disconnected from motor
terminals before motor is removed from unit.
1. Shut off unit main power supply.
2. Loosen bolts on mounting bracket so that fan belt can be
removed.
3. Loosen and remove the 2 motor mounting bracket bolts
on left side of bracket.
4. Slide motor/bracket assembly to extreme right and lift out
through space between fan scroll and side frame. Rest
motor on a high platform such as a step ladder. Do not
allow motor to hang by its power wires.
CONDENSER
PAIL
Fig. 14 — Gravity Flow Method
35
TROUBLESHOOTING
(Fig. 16 and 17, and Table 14)
90.0
80.0
When troubleshooting problems with a WSHP, consider the
following:
70.0
Resistance (kOhm)
Thermistor — A thermistor may be required for singlephase units where starting the unit is a problem due to low
voltage. See Fig. 16 for thermistor nominal resistance.
Control Sensors — The control system employs 2 nominal 10,000 ohm thermistors (FP1 and FP2) that are used for
freeze protection. Be sure FP1 is located in the discharge fluid
and FP2 is located in the air discharge. See Fig. 17.
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
Temperature (F)
Fig. 16 — Thermistor Nominal Resistance
AIRFLOW
(°F)
AIR
COIL
SUCTION
AIRFLOW
(°F)
COMPRESSOR
THERMISTOR
EXPANSION
VALVE
FP2
COAX
DISCHARGE
FP1
CONDENSATE
OVERFLOW
(CO)
LIQUID
LINE
AIR COIL
FREEZE
PROTECTION
WATER IN
WATER
COIL
PROTECTION
WATER OUT
LEGEND
COAX — Coaxial Heat Exchanger
Airflow
Refrigerant Liquid Line Flow
Fig. 17 — FP1 and FP2 Thermistor Location
36
Table 14 — Troubleshooting
FAULT
Main Power Problems
HEATING COOLING
POSSIBLE CAUSE
X
X
Green Status LED Off
X
HP Fault — Code 2
High Pressure
X
X
X
LP/LOC Fault — Code 3
Low Pressure/Loss of
Charge
FP1 Fault — Code 4
Water Freeze Protection
X
X
X
X
X
X
X
X
X
X
X
X
FP2 Fault — Code 5
Air Coil Freeze
Protection
X
X
X
X
Condensate Fault —
Code 6
Over/Under Voltage —
Code 7
(Auto Resetting)
X
X
X
X
X
X
X
X
Performance Monitor —
Code 8
X
No Fault Code Shown
X
X
X
X
X
X
X
X
X
X
X
Unit Short Cycles
Only Fan Runs
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SOLUTION
Check line voltage circuit breaker and disconnect.
Check for line voltage between L1 and L2 on the contactor.
Check for 24 VAC between R and C on controller.
Check primary/secondary voltage on transformer.
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate.
Water temperature out of
Bring water temperature within design parameters.
range in cooling
Reduced or no airflow in
Check for dirty air filter and clean or replace.
heating
Check fan motor operation and airflow restrictions.
Dirty air coil — construction dust etc.
Too high external static. Check Tables 5A-5J.
Air temperature out of range Bring return air temperature within design parameters.
in heating
Overcharged with refrigerant Check superheat/subcooling vs typical operating condition.
Bad HP switch
Check switch continuity and operation. Replace.
Insufficient charge
Check for refrigerant leaks.
Compressor pump down at Check charge and start-up water flow.
start-up
Reduced or no water flow in Check pump operation or water valve operation/setting.
heating
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
Inadequate antifreeze level Check antifreeze density with hydrometer.
Improper freeze protect set- Clip JW2 jumper for antifreeze (10 F) use.
ting (30 F vs 10 F)
Water temperature out of
Bring water temperature within design parameters.
range
Bad thermistor
Check temperature and impedance correlation.
Reduced or no airflow in
Check for dirty air filter and clean or replace.
cooling
Check fan motor operation and airflow restrictions.
Too high external static. Check Tables 5A-5J.
Air temperature out of range Too much cold vent air. Bring entering air temperature within design
parameters.
Improper freeze protect set- Normal airside applications will require 30 F only.
ting (30 F vs 10 F)
Bad thermistor
Check temperature and impedance correlation.
Blocked drain
Check for blockage and clean drain.
Improper trap
Check trap dimensions and location ahead of vent.
Poor drainage
Check for piping slope away from unit.
Check slope of unit toward outlet.
Poor venting. Check vent location.
Moisture on sensor
Check for moisture shorting to air coil.
Under voltage
Check power supply and 24 VAC voltage before and during operation.
Check power supply wire size.
Check compressor starting.
Check 24 VAC and unit transformer tap for correct power supply voltage.
Over voltage
Check power supply voltage and 24 VAC before and during operation.
Check 24 VAC and unit transformer tap for correct power supply voltage.
Heating mode FP2>125 F
Check for poor airflow or overcharged unit.
Cooling mode FP1>125 F
Check for poor water flow or airflow.
OR FP2< 40 F
No compressor operation
See scroll compressor rotation section.
Compressor overload
Check and replace if necessary.
Control board
Reset power and check operation.
Dirty air filter
Check and clean air filter.
Unit in 'Test Mode'
Reset power or wait 20 minutes for auto exit.
Unit selection
Unit may be oversized for space. Check sizing for actual load of space.
Compressor overload
Check and replace if necessary.
Thermostat position
Ensure thermostat set for heating or cooling operation.
Unit locked out
Check for lockout codes. Reset power.
Compressor overload
Check compressor overload. Replace if necessary.
Thermostat wiring
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in Test mode.
LEGEND
FP
— Freeze Protection
HP
— High Pressure
LED
— Light Emitting Diode
LP/LOC — Low Pressure/Loss of Charge
RV
— Reversing Valve
37
Table 14 — Troubleshooting (cont)
FAULT
Only Compressor Runs
HEATING COOLING
POSSIBLE CAUSE
X
X
Thermostat wiring
X
X
Fan motor relay
X
X
X
X
Fan motor
Thermostat wiring
X
Reversing valve
X
X
X
Thermostat setup
Thermostat wiring
Dirty filter
Reduced or no airflow in
heating
X
Reduced or no airflow in
cooling
X
X
Leaky ductwork
X
X
X
X
X
X
X
X
X
Low refrigerant charge
Restricted metering device
Defective reversing valve
Thermostat improperly
located
Unit undersized
X
X
X
X
X
Unit Does Not Operate in
Cooling
Insufficient capacity/
Not cooling or heating
properly
High Head Pressure
X
X
X
X
X
X
Low Suction Pressure
X
X
X
X
X
X
X
X
X
X
Low discharge air
temperature in heating
High humidity
FP
— Freeze Protection
HP — High Pressure
LED — Light Emitting Diode
X
X
X
X
X
X
Scaling in water heat
exchanger
Inlet water too hot or cold
Reduced or no airflow in
heating
SOLUTION
Check G wiring at heat pump. Jumper G and R for fan operation.
Jumper G and R for fan operation. Check for line voltage across BR
contacts.
Check fan power enable relay operation (if present).
Check for line voltage at motor. Check capacitor.
Check Y and W wiring at heat pump. Jumper Y and R for compressor
operation in test mode.
Set for cooling demand and check 24 VAC on RV coil and at control.
If RV is stuck, run high pressure up by reducing water flow and while
operating engage and disengage RV coil voltage to push valve.
Check for 'O' RV setup not 'B'.
Check O wiring at heat pump. Jumper O and R for RV coil.
Replace or clean.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high external static. Check blower Tables 5A-5J.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high external static. Check blower Tables 5A-5J.
Check supply and return air temperatures at the unit and at distant duct
registers if significantly different, duct leaks are present.
Check superheat and subcooling.
Check superheat and subcooling. Replace.
Perform RV touch test.
Check location and for air drafts behind thermostat.
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
Perform Scaling check and clean if necessary.
Check load, loop sizing, loop backfill, ground moisture.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high external static. Check blower Tables 5A-5J.
Reduced or no water flow in Check pump operation or valve operation/setting.
cooling
Check water flow adjust to proper flow rate.
Inlet water too hot
Check load, loop sizing, loop backfill, ground moisture.
Air temperature out of range Bring return air temperature within design parameters.
in heating
Scaling in water heat
Perform Scaling check and clean if necessary.
exchanger
Unit overcharged
Check superheat and subcooling. Reweigh in charge.
Non-condensables in
Vacuum system and reweigh in charge.
system
Restricted metering device Check superheat and subcooling. Replace.
Reduced water flow in
Check pump operation or water valve operation/setting.
heating
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
Water temperature out of
Bring water temperature within design parameters.
range
Reduced airflow in cooling Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Too high external static. Check blower Tables 5A-5J.
Air temperature out of range Too much cold vent air. Bring entering air temperature within design
parameters.
Insufficient charge
Check for refrigerant leaks.
Too high airflow
Check blower Tables 5A-5J.
Poor performance
See 'Insufficient Capacity'.
Too high airflow
Check blower Tables 5A-5J.
Unit oversized
Recheck loads and sizing check sensible cooling load and heat pump
capacity.
LEGEND
LP/LOC — Low Pressure/Loss of Charge
RV
— Reversing Valve
Copyright 2003 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00096
Printed in U.S.A.
Form 50H,V-9SI
Pg 38
6-03
Replaces: 50H,V-8SI
Book 1 4
Tab 5a 5a
50HQL,VQL
START-UP CHECKLIST
CUSTOMER:___________________________
JOB NAME: _______________________________________
MODEL NO.:___________________________
SERIAL NO.:____________________
DATE:_________
I. PRE-START-UP
DOES THE UNIT VOLTAGE CORRESPOND WITH THE SUPPLY VOLTAGE AVAILABLE? (Y/N)
HAVE THE POWER AND CONTROL WIRING CONNECTIONS BEEN MADE AND TERMINALS
TIGHT? (Y/N)
HAVE WATER CONNECTIONS BEEN MADE AND IS FLUID AVAILABLE AT HEAT EXCHANGER?
(Y/N)
HAS PUMP BEEN TURNED ON AND ARE ISOLATION VALVES OPEN? (Y/N)
HAS CONDENSATE CONNECTION BEEN MADE AND IS A TRAP INSTALLED? (Y/N)
IS AN AIR FILTER INSTALLED? (Y/N)
II. START-UP
IS FAN OPERATING WHEN COMPRESSOR OPERATES? (Y/N)
IF 3-PHASE SCROLL COMPRESSOR IS PRESENT, VERIFY PROPER ROTATION PER INSTRUCTIONS.
(Y/N)
UNIT VOLTAGE — COOLING OPERATION
PHASE AB VOLTS
PHASE BC VOLTS
(if 3 phase)
PHASE CA VOLTS
(if 3 phase)
PHASE AB AMPS
PHASE BC AMPS
(if 3 phase)
PHASE CA AMPS
(if 3 phase)
CONTROL VOLTAGE
IS CONTROL VOLTAGE ABOVE 21.6 VOLTS? (Y/N)
.
IF NOT, CHECK FOR PROPER TRANSFORMER CONNECTION.
TEMPERATURES
FILL IN THE ANALYSIS CHART ATTACHED.
COAXIAL HEAT COOLING CYCLE:
EXCHANGER
FLUID IN
F
FLUID OUT
F
PSI
FLOW
HEATING CYCLE:
FLUID IN
F
FLUID OUT
F
PSI
FLOW
COOLING CYCLE:
AIR IN
F
AIR OUT
F
HEATING CYCLE:
AIR IN
F
AIR OUT
F
AIR COIL
Book
Tab
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
1 1 1 4 4 4
CL-1 in U.S.A.
PC 111
Catalog No. 536-203
Printed
Form 62AQ-1SI
Pg CL-1
7-99
Replaces: New
1a 1b 5a 5a 6a 6b
PSI
SAT
°F
AIR
COIL
SUCTION
°F
°F
COMPRESSOR
EXPANSION
VALVE
COAX
DISCHARGE
°F
LIQUID LINE
°F
PSI
WATER IN
°F
PSI
WATER OUT
COOLING CYCLE ANALYSIS
PSI
SAT
°F
AIR
COIL
°F
SUCTION
°F
COMPRESSOR
EXPANSION
VALVE
COAX
DISCHARGE
°F
LIQUID LINE
°F
PSI
WATER IN
°F
PSI
WATER OUT
HEAT OF EXTRACTION (ABSORPTION) OR HEAT OF REJECTION =
FLOW RATE (GPM) x
TEMP. DIFF. (DEG. F) x
FLUID FACTOR* =
(Btu/hr)
SUPERHEAT = SUCTION TEMPERATURE – SUCTION SATURATION TEMPERATURE
(DEG F)
=
SUBCOOLING = DISCHARGE SATURATION TEMPERATURE – LIQUID LINE TEMPERATURE
=
(DEG F)
*Use 500 for water, 485 for antifreeze.
*97B0019N01*
Copyright 2003 Carrier Corporation
Book
Tab
97B0019N01
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
1 4
PC 111
Catalog No. 535-00096
Printed in U.S.A.
Form 50H,V-9SI
Pg CL-2
6-03
Replaces: 50H,V-8SI
5a 5a
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
HEATING CYCLE ANALYSIS
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