50VS
AQUAZONE™
50VS
Vertical Stack Water Source Heat Pump
with PURON® (R-410A) Refrigerant
Installation, Start-Up, and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Step 1 — Check Jobsite . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Step 2 — Check Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
•STORAGE
• PROTECTION
• INSPECT UNIT
Step 3 — Locate Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 4 — Install Drywall . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Step 5 — Install Cabinet and Riser. . . . . . . . . . . . . . . . . . .8
• SYSTEM PIPING ARRANGEMENTS
• RISER MATERIAL, SIZING, AND INSTALLATION
• RISER EXPANSION
• RISER CONNECTIONS
• COMMERCIAL WATER LOOP APPLICATION
• GROUND-LOOP HEAT PUMP APPLICATION
• OPEN-LOOP GROUND WATER SYSTEMS
Step 6 — Wire Field Power Supply Connections . . . .13
• ELECTRICAL-LINE VOLTAGE
• POWER CONNECTION
• 208/230-VOLT OPERATION
Step 7 — Wire Field Control Connections . . . . . . . . . .15
Step 8 — Clean and Flush System. . . . . . . . . . . . . . . . . . 15
Step 9 — Install Hose Kit . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Step 10 — Install Chassis into the Cabinet . . . . . . . . .16
Step 11 — Install Return Panel . . . . . . . . . . . . . . . . . . . . .16
Step 12 — Install Supply Grille . . . . . . . . . . . . . . . . . . . . .17
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17,18
System Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
FIELD SELECTABLE INPUTS . . . . . . . . . . . . . . . . . . . . 18,19
DIP Switch Settings and Operation . . . . . . . . . . . . . . . . .18
Standard 24-vac Sequence of Operation. . . . . . . . . . . .19
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19,20
Operating Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Lockout Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Water Coil Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Evaporator Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21,22
Lockout Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . CL1,CL2
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 such as 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 a local
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.
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 this symbol is displayed on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
WARNING
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.
The 50VS water source heat pump (WSHP) is a vertically
stacked unit 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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500046-01 Printed in U.S.A. Form 50VS-1SI Pg 1 311 10-08 Replaces: New
INSTALLATION
Step 1 — Check Jobsite —
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 Table 1 for unit
physical data.
IMPORTANT: This equipment is designed for indoor
installation ONLY. Extreme variations in temperature,
humidity and corrosive water or air will adversely affect
Installation, operation and
The 50VS units are designed for indoor installations. Units
are typically installed in a floor-level closet or a small mechanical room. Be sure to allow adequate space around the unit for
servicing. See Fig. 1-5 for unit dimensions.
CAUTION
To avoid equipment damage, do not use 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.
the unit performance, reliability and service life.
Table 1 — Physical Data — 50VS Unit
UNIT 50VSA,B 50VSC,D 50VSE,F 50VSG,H 50VSI,J 50VSK,L 50VSM,N
COOLING CAPACITY (Btuh)
HEATING CAPACITY (Btuh)
CABINET WEIGHT (lb)
CHASSIS WEIGHT (lb)
COMPRESSOR (1 each)
High Side Pressure (psig)
Low Side Pressure (psig)
FACTORY REFRIGERANT CHARGE R-410A (oz) 27.5 27.5 36.7 41.6 49.4 63.5 61.8
FAN DATA
Fan Motor Type/Speeds
Blower Wheel Size (Depth x Width) (in.)
Std/High Static
Airflow (cfm)
Static Pressure (in. wg)
WATER/CONDENSATE SIDE DATA
Flow Rate (gpm)
Water Connection Size (FPT) (in.)
Water Side Pressure Drop (psi)
Condensate Connection Size (in.)
AIR COIL DATA
Total Face Area (sq ft)
Tube Size (in.)
Fin Spacing (FPI)
Number of Rows
CABINET DATA
Depth (in.)
Height (in.)
Width (in.)
Standard Filter -- 1 in. Washable
FPI — Fins Per Inch
PSC — Permanent Split Capacitor
LEGEND
9,200 11,700 16,500 18,000 22,500 28,500 32,700
12,500 16,000 22,500 24,500 31,000 38,000 45,000
120 170
99 105 119 122 187 198 205
Rotary Scroll
550
170
PSC/2 speed
7.08 x 6.69 9.21 x 9.99
370 450 540 640 820 1120 1300
0
2.6 3.2 4.5 5.2 6.5 8.5 9.5
1/2 3/4
5.8 5.8 11.5 11.8 4.8 7.2 10.2
3/4
1.48 1.48 1.81 1.48 1.48 1.81 1.48
3/8
12 14 10
2 323
18 24
88 88
18 24
14-1/4 x 18-1/2 14-1/4 x 22-1/2 19 x 28-3/4
2
2 1/2" 2 1/2"
a50-8295
UNIT
DIMENSION A
(in.)
WATER
CONNECTION
SIZE (FPT) (in.)
COIL
CONNECTION
SIZE (in.)
50VSA,B 18
1
/
2
1
/
2
50VSC,D 18
1
/
2
1
/
2
50VSE,F 18
3
/
4
3
/
4
50VSG,H 18
3
/
4
3
/
4
50VSI,J 241/
4
3
/
4
3
/
4
50VSK,L 241/
4
3
/
4
3
/
4
50VSM,N 241/
4
3
/
4
3
/
4
Fig. 1 — 50VS Unit Dimensional Data
A
3"
10"
13 13/16"
55 1/2"
SUPPLY
2 3/8"
A
DRAIN
RETURN
SWAGE
12" 6 1/8"
2 1/4"
SUPPLY GRILLE
OPTIONAL 24V
THERMOSTAT
LOCATION
CONTROL BOX
ACCESS
FILTER
65 1/4"
104" to 115"
AIR COIL
3"
88"
MOTOR /BLOWER
HOSE KITS
RISERS
CONTROL BOX
OPTIONAL AUTO FLOW
REGULATOR LOCATION
FACTORY-INSTALLED
SUPPLY AND RETURN
FEEDERS WITH BALL
VALVES
5 5/8"
RETURN
AIR OPENING
AIR COIL
DRAIN PAN
ACOUSTICAL
INSULATION
RISER
TAILPIECE
3
HEAT PUMP CHASSIS
CONDENSATE DRAIN PAN
FACTORY
IN
STALLED
P-TRAP
NOTES:
1. Single deflection grilles include adjustable vertical blades for controlling horizontal path of discharge.
2. Double deflection grilles include adjustable vertical and horizontal blades for controlling horizontal and vertical path of
discharge air (recommended).
3. Dimensions are in inches.
4. All dimensions are
1
/4 inch.
5. Discharge grilles are shipped loose for field installation.
6. Construction is roll formed aluminum frame and blades.
7. Standard finish is powder coated and will be the same color as the return grille.
8. Installation of grille on adjacent unit sides may require a duct extension to prevent air bypass around discharge grilles.
9. Mounting hardware included.
DIMENSIONAL DATA
Grille Size (in.)
Cabinet
Height
W (in.) H (in.) A (in.) B (in.) C (in.)
16 x 14 STD 15
7
/
16
137/
16
18 16 8
14 x 12 STD 13
3
/
8
113/
8
16 14 7
12 x 10 STD 11
7
/
16
117/
16
14 12 6
10 x 8 STD 9
7
/
16
97/
16
12 10 5
H
C
A
W
5/8-in.
B
2-in.
a50-8291
Fig. 2 — Single and Double Deflection Aluminum Discharge Grille
4
NOTES:
1. The opposed blade damper allows control of air volume (cfm) and path of discharge air. Recommended for applications requiring unequal airflow or side discharge grille(s) with additional top discharge air opening.
2. Dimensions are in inches.
3. All dimensions are
1
/4 inch.
4. Discharge grilles are shipped loose for field installation.
5. Construction is roll formed aluminum frame and blades.
6. Standard finish is powder coated and will be the same color as the return grille.
7. Installation of grille on adjacent unit sides may require a duct extension to prevent air bypass around discharge grilles.
8. Mounting hardware included.
DIMENSIONAL DATA
Grille Size (in.)
Cabinet
Height
W (in.) H (in.) A (in.) B (in.) C (in.) D (in.)
16 x 14 STD 15
3
/
16
133/
16
173/
4
153/
4
N/A 47/
8
14 x 12 STD 133/
16
113/
16
153/
4
133/
4
67/
8
N/A
12 x 10 STD 11
3
/
16
93/
16
133/
4
113/
4
57/
8
N/A
10 x 8 STD 9
3
/
16
73/
16
113/
4
93/
4
47/
8
N/A
H
C
A
W
5/8"
D
B
3 1/8"
a50-8296
Fig. 3 — Double Deflection with Opposed Damper Aluminum Discharge Grille
5
21.13
26.28
58.0063.15
61.11
24.19
17.68
24.91
2.95
55.35
STANDARD PERIMETER BYPASS
ALLEN LOCK, REMOVABLE
OPTIONAL PERIMETER
BYPASS ALLEN LOCK OR
KEY LOCK, HINGED
OPTIONAL LOUVERED
ALLEN LOCK, REMOVABLE
a50-8298
30.38
a50-8300
a50-8297
NOTE: All dimensions are in inches.
Fig. 4 — Return Panel and Frame Dimensions — 50VSA-VSH Units
2.38
*
* ROUGH-IN OPENING PLUS 1/4-in.
STANDARD PERIMETER BYPASS
ALLEN LOCK, REMOVABLE
OPTIONAL PERIMETER
BYPASS ALLEN LOCK OR
OPTIONAL LOUVERED
ALLEN LOCK, REMOVABLE
KEY LOCK, HINGED
6
STANDARD PERIMETER BYPASS
ALLEN LOCK, REMOVABLE
OPTIONAL PERIMETER
BYPASS ALLEN LOCK OR
KEY LOCK, HINGED
OPTIONAL LOUVERED
ALLEN LOCK, REMOVABLE
STANDARD PERIMETER BYPASS
a50-8299
24.38
*
2.38
* ROUGH-IN OPENING PLUS 1/4-in.
a50-8301
a50-8297
NOTE: All dimensions are in inches.
Fig. 5 — Return Panel and Frame Dimensions — 50VSI-VSN Units
ALLEN LOCK, REMOVABLE
32.28
27.13
2.95
OPTIONAL PERIMETER
BYPASS ALLEN LOCK OR
KEY LOCK, HINGED
OPTIONAL LOUVERED
ALLEN LOCK, REMOVABLE
30.19
63.90 58.75
58.75
61.86
24.91
19.68
7
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. Be sure that the location chosen for unit installation provides ambient temperatures maintained above freezing.
Well water applications are especially susceptible to
freezing.
2. 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.
3. Check local codes to be sure a secondary drain pan is not
required under the unit.
4. 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.
5. Provide sufficient space for duct connection. Do not
allow the weight of the ductwork to rest on the unit.
6. Provide adequate clearance for filter replacement and
drain pan cleaning. Do not allow piping, conduit, etc. to
block filter access.
7. 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.
8. Provide an unobstructed path to the unit within the closet
or mechanical room. Space should be sufficient to allow
removal of unit if necessary.
9. Provide ready access to water valves and fittings, and
screwdriver access to unit side panels, discharge collar,
and all electrical connections.
10. 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 immediately 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 cartons high. Do not remove any equipment from its shipping package until it is needed for installation.
PROTECTION — Once the units are properly positioned on
the jobsite, cover them with either a shipping carton, vinyl film,
or an equivalent protective covering. Cap open ends of pipes
stored on the jobsite. This precaution is especially important in
areas where painting, plastering, or spraying of fireproof material, etc. is not yet complete. Foreign material that accumulates
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.
CAUTION
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. Do not remove the packaging until the unit is ready for
installation.
3. Verify that the unit’s refrigerant tubing is free of kinks or
dents, and that it does not touch other unit components.
4. Inspect all electrical connections. Be sure connections are
clean and tight at their terminations.
5. Remove any blower support cardboard from inlet of the
blower.
6. Locate and verify any accessory kit located in compressor
and/or blower section.
7. Remove any access panel screws that may be difficult to
remove once unit is installed.
Step 3 — Locate Unit — The following guidelines
should be considered when choosing a location for a WSHP:
• Units are for indoor use only.
• Locate in areas where ambient temperatures are between
39 F and 102 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 easy access and removal
of filter and access panels.
• Allow enough space for service personnel to perform
maintenance.
• Return air must be able to freely enter the space if unit needs
to be installed in a confined area such as a closet.
Step 4 — Install Drywall — All rough-in instructions
and drawings are designed for a single layer of
wall. Refer to Fig. 6. Rough-in dimensions will be affected if
drywall thickness is different than
not fit snugly to the wall and form a tight seal. Install drywall
using conventional construction methods. Drywall cannot be
fastened to the studs with adhesive alone; a mechanical fastener such as drywall screws must be used.
Vacuum all drywall dust and construction debris from coils,
drain pans and blower discharge plenum after cutting out supply and return holes for grilles. When installation is complete,
cover cabinet supply and return air openings.
Do not allow paint or wall texture over-spray to contact coil,
fan or other unit components. Warranties are void if paint or
other foreign debris is allowed to contaminate internal unit
components.
5
/8 in., the return panel will
5
/8 in. thick dry-
Step 5 — Install Cabinet and Riser
SYSTEM PIPING ARRANGEMENTS — Figure 7 shows
some of the common piping layouts for water source heat
pumps. 2-pipe systems are depicted but the same methods can
be applied to 4-pipe systems.
8
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