Omega VSHP, VSHP 040, VSHP 050, VSHP 060, VSHP 030 Installation And Operation Manual
...
OMEGA VSHP SERIES
Installation and Operation Manual (IOM)
VERTICAL STACKED
WATER SOURCE HEAT PUMPS
MODEL: VSHP
DEV. F
DOCUMENT RELEASE: OMEGA-VSHP.F-IOM-1907
ISSUE DA TE: JULY 2019
3325A Orlando Dr.
Mississauga, ON, L4V 1C5
T. 90 5.670 .2269
F. 905.670.3822
omega -heat pump. com
omega@omega-heatpump.com
OMEGA | WATER SOURCE HEAT PUMPS O MEGA -VSHP .F-IOM- 1907
i www.omega-heatp ump.com
TABLE OF CONTENTS
1. General Information, Warnings and Disclaimer ................................................................................. 1
2. Cabinet Dimensions ............................................................................................................................. 2
3. General Unit Information ..................................................................................................................... 5
4. Inspection & Storage ........................................................................................................................... 5
Inspection of Unit...................................................................................................................... 5
Storage ...................................................................................................................................... 6
5. Cabinet & Riser Installation ................................................................................................................. 6
For Shipped Loose Riser Shut-Off Valves ................................................................................ 6
Cabinet Install ........................................................................................................................... 6
Riser Loop ................................................................................................................................. 7
Servicing .................................................................................................................... 7
Flushing & Cleaning .................................................................................................. 7
Riser System Loop Temperature ............................................................................................. 7
Cooling Season ......................................................................................................... 7
Heating Season ......................................................................................................... 7
Operating Limits ........................................................................................................ 8
6. Chassis Installation .............................................................................................................................. 8
Installation of Fittings and Hoses ............................................................................................ 8
Units with NPSM Riser and Chassis Fittings ........................................................... 8
Units with NPT Riser and Chassis Fittings ............................................................... 8
Chassis Install ........................................................................................................................... 8
7. Unit Start-Up ......................................................................................................................................... 9
Checklist ................................................................................................................................... 9
Initial Start-Up ........................................................................................................................... 9
8. Controls .............................................................................................................................................. 10
Microprocessor Controller ...................................................................................................... 10
DIP Switch Settings ................................................................................................. 10
Thermostat Cable ................................................................................................... 10
Automatic Fan Mode Operation ............................................................................. 10
Single/Manual Fan Mode Operation ..................................................................... 10
Fan Control with PSC Motors ................................................................................. 10
Fan Control with ECM ............................................................................................. 10
Whisper Mode (ECM Only) ...................................................................................... 10
Fan Control with ECM X13...................................................................................... 11
Sequence of Operation .......................................................................................................... 11
9. Troubleshooting ................................................................................................................................. 11
Test Mode ............................................................................................................................... 12
Web Based Access ................................................................................................................. 12
10. Maintenance Guide ......................................................................................................................... 14
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LIST OF FIGURES & TABLES
FIGURES
Figure 1: Silver Series Cabinet Dimensions ..................................................................................................................... 2
Figure 2: Gold Series Cabinet Dimensions ....................................................................................................................... 3
Figure 3: VSHP Assembly View ......................................................................................................................................... 4
Figure 4: Silver and Gold Series Cabinets ...................................................................................................................... 17
Figure 5: Riser Handing Configurations.......................................................................................................................... 18
Figure 6: Riser Length Measurements ........................................................................................................................... 19
Figure 7: Riser Stub-Out Opening Detail (Side View) ...................................................................................................... 20
Figure 8: Riser Stub-Out Distance from Cabinet Wall .................................................................................................... 20
Figure 9: Hose Kit Details ............................................................................................................................................... 21
Figure 10: Standard “Knockout” Supply Openings ........................................................................................................ 22
Figure 11: Optional Fresh Outside Air Duct .................................................................................................................... 23
Figure 12: Top Supply Air Opening Configurations with Fresh Air Duct ......................................................................... 24
Figure 13: VSHP Acoustic Return Air Panel ................................................................................................................... 25
Figure 14: Acoustic Panel Cabinet Base Height Calculation ......................................................................................... 26
Figure 15: Acoustic R/A Panel Furring Drawing - Typ. 2x2 Framing .............................................................................. 27
Figure 16: Acoustic R/A Panel Furring Drawing - Typ. 2x4 Framing .............................................................................. 27
Figure 17: Acoustic R/A Panel Furring Drawing - Front & Side View ............................................................................. 28
Figure 18: Perimeter Panel Dimensional Drawing ......................................................................................................... 29
Figure 19: Perimeter Panel Cabinet Base Height Calculation ....................................................................................... 30
Figure 20: Perimeter R/A Panel Furring Drawing - Typ. 2x2 Framing ............................................................................ 31
Figure 21: Perimeter R/A Panel Furring Drawing - Typ. 2x4 Framing ............................................................................ 31
Figure 22: Perimeter R/A Panel Furring Drawing - Front & Side View ........................................................................... 32
Figure 23: VSHP Electrical Schematic- PSC Fan Motor.................................................................................................. 33
Figure 24: VSHP Electrical Schematic - ECM Fan .......................................................................................................... 34
Figure 25: Thermostat Wiring Detail............................................................................................................................... 35
TABLES
Table 1: VSHP Cabinet Dimensions (Silver & Gold Series) .............................................................................................. 2
Table 2: Unit Operation Limits .......................................................................................................................................... 8
Table 3: DIP Switch Settings ........................................................................................................................................... 10
Table 4: DIP 1 (ON) = Heat Pump Thermostat ............................................................................................................... 10
Table 5: DIP1 (OFF) = HEAT/COOL Thermostat .............................................................................................................. 10
Table 6: Replacement Filters .......................................................................................................................................... 14
Table 7: Troubleshooting Guide ...................................................................................................................................... 15
Table 8: Microprocessor LED Code Guide ...................................................................................................................... 16
Table 9: VSHP Cabinet Riser Dimensions ...................................................................................................................... 18
Table 10: Hose Kit Sizes ................................................................................................................................................. 21
Table 11: Supply Air Opening Sizes ................................................................................................................................ 23
Table 12: Supply Air Opening Sizes w/ Fresh Air Duct ................................................................................................... 25
Table 13: Acoustic Panel Sizes ....................................................................................................................................... 26
Table 14: Acoustic Panel Rough-In Dimensions............................................................................................................. 28
Table 15: Perimeter Panel Sizes .................................................................................................................................... 29
Table 16: Perimeter Panel Rough-In Dimensions .......................................................................................................... 32
Table 17: PSC Fan Data .................................................................................................................................................. 36
Table 18: ECM Fan Data ................................................................................................................................................. 37
VSHP UNIT START-UP SHEET ................................................................................................................................. 38
OMEGA | WATER SOURCE HEAT PUMPS O MEGA -VSHP .F-IOM- 1907
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IMPORTANT
READ THE FOLLOWING MANUAL PRIOR TO INSTALLATION, OPERATION and SER-
VICING THIS UNIT.
1. GENERAL INFORMATION & WARNINGS
SAFETY SYMBOLS – Warnings, Cautions & Notices
There are three advisory symbols used in this document to alert the reader:
Warning: Indicates a potentially dangerous situation which could result in death or
serious injury.
Caution: Indicates a possible hazardous situation which can result in possible inju-
ries or damage to unit and/or environmental pollution, or to alert against practices
that are unsafe.
Note: Identifies important information to the technician to complete the installation
correctly.
Responsible Refrigerant Practices
All technicians who handle refrigerants must be certified in accordance with local codes for
reclaiming, recovering, recycling and handling of refrigerants. Technicians must follow all
applicable local and federal laws.
Correct field wiring and grounding is required, failure to adhere and follow code
could result in death of serious injury. ALL FIELD WIRING MUST BE PER-
FORMED ONLY BY A QUALIFIED ELECTRICIAN. All wiring must be in accord-
ance of with the manufacturer’s specifications.
Wiring that is improperly installed and/or grounded could result in FIRE, ELECTROCUTION, and other serious hazards. Manufacturer is not responsible for damage/
equipment or site issues resulting from the improper connections of the unit or the
use of improper controls.
Personal Protective Equipment (PPE) is mandatory. Technicians installing or servicing this unit must use all PPE including but not limited to: hard hats, safety glass-
es, cut resistant sleeves and gloves, electrical PPE, and fall protection.
Disclaimer
All units are certified and built in accordance to applicable government and industry standards. Any customer modifications performed without the express written approval from the
manufacturer are strictly prohibited and will void all warranties expressed or implied.
Modifications to the unit may result in hazardous or unexpected operation of the
unit. Modifications to the unit may result in a potentially hazardous situation result-
ing in equipment damage, property damage, injury or death.
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Notes:
Temporary riser supports provided (Contractor to
remove and install permanent riser clamps fastening
risers to the building structure).
Return air opening is on the front of the unit.
Unit includes hose kits and manual shut off valves.
Optional risers are furnished with type L, M copper.
Available 3 inch deep swage connections on same size
piping.
Contractor to provide couplings where the piping is not
swaged or for joining dissimilar piping sizes.
Use flexible duct connections to supply ducts and
registers.
2. CABINET DIMENSIONS
Table 1 VSHP Cabinet Dimensions (Silver & Gold Series)
Figure 1 Silver Series Dimensional Drawing
Model
Cabinet
Size
Dimensions (in)
"W" "D" "C"
VSHP 020
X
16 18.5 14 VSHP 030
VSHP 040
VSHP 050
Y 18 21.5 16
VSHP 060
VSHP 080
Z 22 25.5 20
VSHP 100
VSHP 120
(Drawing not to scale, dimensions are subject to change)
RIGHT SIDE VIEWFRONT VIEW
Total
Unit
Height
Base Height
Std.= 5"
3"
Cabinet
Height
Max.=120"
Std. = 79"
"W"
8"
29.5"
2.5"
"D"
48.75"
Power
Wiring
Entrance
7/8" OD
Low Voltage
Entrance
7/8" OD
High Voltage
Cover
Low Voltage
Cover
Discharge Supply Air
Opening "Knockouts"
with 1-1/2" Duct Flange
Condensate Hose
Riser
Stub-Out
Opening
"Knockouts"
Removable
Service Cover
Panel
"C"
45"
Neoprene Pad
4"
3"
Note:
Stub-Outs
Centered on
Back Riser
6"
6"
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(Drawing not to scale, dimensions are subject to change)
Figure 2 Gold Series w/ Acoustic Plenum Dimensional Drawing
Notes:
Temporary riser supports provided (Contractor to remove and install permanent riser clamps fastening risers to the building
structure).
Return air opening is on the front of the unit.
Unit includes hose kits and manual shut off valves.
Optional risers are furnished with type L, M copper. Available 3 inch deep swage connections on same size piping.
Contractor to provide couplings where the piping is not swaged or for joining dissimilar piping sizes.
Use flexible duct connections to supply ducts and registers.
Power
Wiring
Entrance
7/8" OD
3"
45"
8"
Total
Unit
Height
Cabinet
Height
Max. = 125"
Base Height
Std.= 5"
5"
"W"
*64.5"
2.5"
29.5"
"D"
48.75"
FRONT VIEW
RIGHT SIDE VIEW
Low Voltage
Entrance
7/8" OD
High Voltage
Cover
Low Voltage
Cover
Flexible 3" Canvas
Duct Connector
Discharge Supply Air
Opening "Knockouts"
with 1-1/2" Duct Flange
Acoustic
Discharge Plenum
Condensate Hose
Riser
Stub-Out
Opening
"Knockouts"
Removable
Service Cover
Panel
"C"
Neoprene Pad
3"
4"
6"
6"
Note:
Stub-Outs
Centered on
Back Riser
*Dimension varies with optional surface mount thermostat
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.
.
.
.
.
Figure 3 VSHP Assembly View (Silver Series Cabinet)
1
1. Supply, return and condensate risers. Type ‘M’
or ‘L’ copper.
2. Field “knockout” supply air openings (Front/
Back/Side/Top) with 1-1/2” duct ange.
3. Electrical box with advanced microprocessor.
4. Removable direct drive blower motor assembly.
5. Heat pump chassis.
6. Chassis service cover panel.
7. 1” air lter.
8. Return air (R/A) panel available in acousc or
perimeter (Acousc shown).
9. Standard stainless steel drain pan
2
3
4
5
6
7
8
9
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3. GENERAL UNIT INFORMATION
BLOWER & MOTOR
The unit comes with a blower and motor assembly that
is mounted to a blower deck inside the unit cabinet, located above the chassis behind the electrical box. Removal of the blower/motor assembly is done through the
chassis compartment opening.
UNIT NAMEPLATES
The nameplate contains information about the unit including model and serial numbers, electrical data and
refrigerant charge information. The cabinet nameplate is
located on the surface of the cabinet and the chassis
nameplate is located on the chassis. Collecting the in-
formation on the nameplate will be useful when contacting your local customer service representative or when
ordering parts. The compressor nameplate is located
inside the chassis enclosure (requires removal of sheet
metal enclosure) on the compressor shell.
CONTROLS
The unit comes with a factory supplied transformer. See
wiring diagram for field wiring a thermostat to the electrical box low voltage terminals. High voltage connection is
made on the left side of the cabinet and low voltage con-
nections enter through the right side of the cabinet.
MICROPROCESSOR CONTROLLER
Unit comes with an advanced microprocessor controller
that monitors the entire function of the unit. The microprocessor board comes with an integral terminal strip for
wiring thermostat cable.
REFRIGERANT CONNECTIONS
Low and high pressure side refrigeration service ports re
located inside the compressor enclosure. Slide out chas-
sis and remove sheet metal enclosure to access fittings.
CABINET– SILVER SERIES
The standard Silver series cabinet is a fully factory assembled one piece cabinet. See Figure 1. Use flexible
duct connections for connecting cabinet to supply ducts
to prevent vibration and noise transmission into occu-
pant space.
CABINET– OPTIONAL GOLD SERIES
The optional Gold series cabinet comes in two sections
for enhanced acoustic performance. See Figure 2. The
upper section discharge plenum is lined with 1” thick
insulation on all inside surfaces. Plenum is secured to
cabinet with shipping brackets. Once discharge plenum
is fastened to the underside of the concrete slab shipping brackets must be removed. See Figure 4 for comparison of Silver and Gold series cabinets. Factory in-
stalled flexible connection joins the upper and lower sections. “S” and “D” cleats are used to join upper and lower
plenums to the metal portion of the flex connection. The
plenum comes with factory pre-punched knockouts on
all sides.
RETURN AIR PANEL—ACOUSTIC & PERIMETER
The Acoustic Return Air Panel is insulated with 1/2”
thick, acoustic insulation and removable without tools to
allow access to the filter and (optional) service disconnect switch. The panel is removed by swinging out and
lifting it off the support pegs. The panel should be flush
mounted to the drywall after the cabinet and riser installation is complete. See Figures 14 to 17 for more de-
tailed information.
The Perimeter Return Air Panel door is mounted in the
drywall opening and fastened to the wall studs. See Fig-
ures 18 to 21 for more detailed information.
Cabinet base height and maximum baseboard height dimensions can be determined
by referencing Figures 16 & 20. Use appropriate Figure based on R/A Panel type or-
dered.
THERMOSTAT
Unit comes standard with a factory provided 24 inch
long, 6-wire thermostat cable whip pre-wired to the control board terminal blocks.
4. INSPECTION & STORAGE
INSPECTION OF UNIT
Prior to the installation of the unit perform the following
checks:
• Visually inspect the packaging, cabinet and chassis
for signs of shipping damage prior to signing the bill
of lading. Check that the units match the sales order
by referring to the cabinet and chassis nameplate
information.
• Inspect the riser ends for any sign of damage.
• Verify breaker and power supply meet electrical
nameplate requirements of the unit.
• Check that the nameplate of the units matches the
floor plan layout.
When construction is not complete including concrete
core drilling, drywalling, plastering, painting or any work
that would contaminate the storage space all necessary
precautions are to be taken to prevent the cabinet and
chassis from becoming contaminated. Particulate infiltration (i.e. drywall dust) into cabinet and chassis coil
could result in equipment damage. Fumes could result
in premature corrosion (formicary corrosion) of the chas-
sis air-coil resulting in refrigeration system leaks.
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STORAGE
Both cabinet and chassis units are designed for indoor
use only. Care must be taken to protect the unit from
environmental damage. Store the chassis in an environment with a temperature above (32oF). To prevent contamination the units should be stored indoors. For out-
door storage ensure:
• Units should be placed in an area that will not be
exposed to moisture damage. Units should be
placed on a dry surface and on a raised surface. Do
not stack units.
• Cover the units with a waterproof tarp.
• Failure to keep the units dry could result in the inte-
rior insulation becoming wet and cause the growth
of mold which is known to cause odors and serious
indoor air quality problems and health issues.
• Chassis units must be stored in the upright position
to keep oil in the compressor.
• Riser ends should be capped if being stored on site
to prevent contamination from foreign objects and
debris.
Wet insulation can cause the growth of mould.
Any sign of mould growth in the interior insulation should be removed, cabinet interior disin-
fected with anti-microbial cleaner and replaced prior to operating the unit.
Do not store cabinets on their side when chas-
sis units are inside. Chassis units should always be stored and transported in the upright
position otherwise damage to chassis may
occur.
The refrigeration system of these units contains POE oil. PVC/CPVC piping is prone to
failure when in contact with POE oil. PVC/
CPVC piping should not be used for water
supply and return with any heat pump prod
ucts as this may result in failure of the system
and serious property damage.
Do not rest or lean the unit on the risers. Do not use
the risers or stub-outs to pick up the unit. Only des-
ignated lift points should be used when moving or
lifting cabinets. Do not drop the risers.
5. CABINET & RISER INSTALLATION
Risers are designed to have slight adjustments
for riser system expansion and aligning the
stub-outs in the cabinet opening. When in-
stalling risers, do not let riser stubs bottom out
in the riser swage.
Risers are designed to allow for 1-1/2 inches of
movement due expansion and contraction. If
the total calculated riser expansion exceeds ±1
-1/2 inches the field must provide expansion
compensators.
Riser stub-outs should be located as centrally
as possible in the cabinet opening. Do not al-
low stub-outs to rest or contact the sheet metal
opening.
Do not allow the risers to bottom out when
installing into the swage.
FOR SHIPPED LOOSE RISER SHUT-OFF VALVES
Visually inspect riser stub-outs and shut-off
valves for debris or damage.
Follow industry standard soldering practices
when soldering shut-off valves to riser stubouts.
Ensure riser stub-out surface is cleaned of any
residue, soot or oils. Failure to adequately
clean soldering surfaces can result in water
leaks, property damage and physical injury.
When soldering shut-off valves to riser stub
outs, adequately protect cabinet, insulation
and any other equipment from exposure to
flames and heat.
CABINET INSTALL
1. When cabinets are shipped with risers attached, place
cabinets in a horizontal position on the floor (do not rest
cabinet on the risers).
2. If required, install any field or factory supplied riser
extensions to the unit mounted risers.
3. Raise the entire cabinet slowly upright while at the
same time lowering the risers through the floor cut-out
opening. Align the risers to the matching swaged section
of the riser on the floor below.
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4.Swaged sections are approximately 3 inches deep.
Risers should be inserted at a depth of approximately 2
inches into the 3 inch deep swage. Confirm risers penetrate at a minimum of 1 inch into the swage. Do not allow
the riser tailpiece to bottom out fully into the 3 inch deep
swage. This will allow for floor to floor variations, otherwise riser overlap may not be sufficient on upper floors.
See Figure 6.
5. Align and center riser positions in the pipe chase and
level cabinet as necessary.
6. Secure the cabinet to the floor. Cabinet base comes
with factory mounted neoprene pads.
7. Center the riser stub-outs in the cabinet openings to
allow for riser expansion and prevent contact with cabi-
net sheet metal. Prevent riser stub-outs from contacting
sheet metal pass through otherwise damage to stub-
outs may occur, resulting in serious water damage. See
Figures 7 & 8.
8. Secure risers to building structure as per engineering
design specifications. Do not allow the risers to be supported by the cabinets. Field supplied riser compensators are required if the temperature range of the system
exceeds the expansion and contraction limit.
9. Using industry accepted soldering and brazing stand-
ards and materials to solder or braze the riser joints.
10. Connect supply ducts and discharge grilles. See
Figure 11.
11. Optional Fresh Outside Air Duct details are shown in
Figures 12 & 13 when connecting to remote ERV.
RISER LOOP
Servicing
To enable system flushing, servicing and balancing of
supply and return risers the following field supplied com-
ponents are required: shut-off valves, drain tees and
drain valves, and flow measuring devices. Refer to the
job site engineering design specifications and building
drawings for more detailed information.
Flushing & Cleaning
Once the riser system is complete the riser system must
be flushed, cleaned and chemically treated. Do not connect chassis to the water circulating system when flushing is being conducted to prevent debris and fouling of
the water side components of the chassis (i.e. auto bal-
ancing valve, auto shut-off valve, coaxial coil).
Do not flush and clean riser system with chassis units connected. Do not allow the flushing
and cleansing solutions to flow in the chassis
water coil. Damage to water components may
occur.
Supply and return pipes must be interconnected, at a
minimum in the top and bottom units of each riser, with
factory supplied hoses to properly flush system and ensure adequate elimination of foreign material and clean-
ing of riser system.
1. Use only clean water to fill water circulation system.
Fill the water circulating system at the municipal water
makeup connection with all air vents opened.
2. After air vents have been sequentially closed and riser
system is primed begin water circulation of the system to
purge remaining trapped air bubbles.
3. Shut off the circulating pump and open all the drains
and vents to completely drain the system.
4. The riser system should be cleaned after the initial
flush and flushed a second time to adequately rinse the
riser system of cleaning solution.
Chassis installation is permitted once the riser system is
thoroughly flushed, cleaned, and commissioned by the
riser treatment company and contractor.
RISER SYSTEM LOOP TEMPERATURE
Correct riser system loop temperature settings are important for optimal unit operation. Temperatures outside
of the recommended range will affect overall unit operating performance (capacity and efficiency), long term
reliability and sound performance.
Cooling Season
In cooling mode recommended riser loop temperatures
should be maintained between 85oF to 90oF. Higher riser
loop temperatures reduce unit cooling capacity and efficiency and increase sound levels. Lower riser loop tem-
peratures will increase unit operating efficiency.
Operation of riser loop temperatures above 110oF EWT
is not permitted, and sustained operation above 100oF
will reduce cooling capacity and may increase unit
sound levels and maintenance costs. If loop temperatures are close to permissible levels, riser loop can experience water temperature spikes above recommended
during peak demand loads. Refer to Table 2: Unit Oper-
ation Limits.
Heating Season
In heating mode riser loop temperatures must be maintained within 55oF to 90oF for standard range operation.
For Geothermal Range operation the system loop must
contain an appropriate glycol mixture where system loop
temperatures are low enough that could result in freezing of the water circuit. For low temperature operation
units must come with factory Geothermal Range option.
Do not operate riser system below 20oF EWT due to
reduced heating capacity and efficiency. See Table 2.
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Operating Limits
Table 2: Unit Operation Limits
Design limits can not be combined. Combining maximum or minimum limits is not allowed. This could exceed the operation and
design limits of the unit.
For example: It is not allowed to combine maximum entering air temperature (EAT) limits with maximum enter-
ing fluid temperature (EFT) limits.
6. CHASSIS INSTALLATION
Do not apply plumbers putty, pipe dope or
sealing tape to NPSM fittings.
Always use a back-up wrench when tightening
hoses or fittings. Damage to copper pipes and
solder joints could result in serious equipment
and property damage.
Check hoses and fittings for any visible dam-
age or debris.
INSTALLATION OF FITTINGS AND HOSES
Upon removal of service cover panel check cabinet interior for construction debris and dust. Clean out all dust
and debris.
Close riser shut-off valves and disconnect factory hoses
from riser supply or return shut off valves.
Units with NPSM Riser and Chassis Fittings
Connect the supplied hoses to the Male-NPSM riser
shut-off valves. Do not apply pipe dope or pipe sealant
to NPSM fittings. Always use a back-up wrench. Do
not overtighten. See Figure 9: Hose Kit Details.
Units with NPT Riser and Chassis Fittings
Connect the supplied male-male (NPT/ NPSM) couplings to the Female-NPT supply and return riser shut-
off valves. Do not apply pipe dope to the NPSM fittings,
as these are JIC style fittings.
Connect the supplied hoses to the riser shut-off valves.
Always use a back-up wrench. Do not overtighten.
CHASSIS INSTALL
1. Remove chassis packaging, leaving cardboard shipping cover on the air coil cover in place. Check chassis
nameplate to verify chassis model matches cabinet
model for compatibility.
2. Align chassis with front of the cabinet and tilt chassis
so that the back aligns with the cabinet rails.
3. Slide chassis into cabinet partially. Check to ensure
wiring harnesses are not being pinched. Adjust the chassis to ensure it is resting approximately centered in the
rails.
4. Connect the hoses by hand to the chassis supply and
return connections. Hand tighten, then using a back-up
wrench tighten fittings as necessary. Ensure that the
hose supply and return connections are not reversed
and matched to correct risers. Water IN and water OUT
is stamped on the chassis sheet metal enclosure.
5. If riser loop system has been commissioned and oper-
ational open the riser shut-off valves. Check for any
signs of water leaks at all water connection points.
6. Connect the chassis electrical plugs to the quick con-
nect mating plugs in the cabinet electrical box.
7. Slide the chassis into the cabinet. Check to ensure
wiring harnesses and hoses are not being pinched. Do
not push against the air coil surface.
8. Ensure hoses are not pressed against unit cabinet.
9. Remove cardboard shipping cover from the air coil.
10. Install the service cover panel and visually check
foam gasket around service cover panel perimeter is not
damaged and providing an adequate seal.
11. Insert filter into service cover panel.
12. Install Return Air Panel into the closet drywall open-
ing if not already done and secure with screws.
Air Limits
Cooling Heating
DB WB DB
Std. Entering Air
Temperature (EAT)
75
o
F 63oF 68oF
Min. Entering Air
Temperature (EAT)
65
o
F 55oF 50oF
Max. Entering Air
Temperature (EAT)
85
o
F 71oF 80oF
Fluid Limits
Standard Range Geothermal Range
Cooling Heating Cooli ng Heating
Std. Entering Fluid
Temperature (EFT)
85
o
F 70oF 85oF 60oF
Min. Entering Fluid
Temperature (EFT)
50
o
F 55oF 30oF 20oF
Max. Entering Fluid
Temperature (EFT)
110
o
F 90oF 110oF 90oF
CFM Limits
Fluid GPM Limits
Min. CFM/
Ton
300
Min. GPM/
Ton
1.5
Design
CFM/Ton
400
Design
GPM/Ton
3
Max. CFM/
Ton
450
Max. GPM/
Ton
4
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7. UNIT START-UP
Ensure the building loop system has been cleaned,
flushed, chemically treated and commissioned by the
water treatment company. Verify that the main system
strainers or mechanical filtration system has been installed and commissioned. The chassis should be at
room temperature (68
o
F) prior to start up.
Once the installation of the cabinet and chassis units is
complete the riser shut-off valves can be opened. The
riser loop system should be filled and all trapped air
should be bled from the system prior to unit start-up.
Water flow failure will cause the unit to trip on the safety
devices. Repeated water flow failures can cause equip-
ment damage.
CHECKLIST
Before energizing the unit ensure all steps are verified in
the following checklist:
___High voltage power supply is correct and in accord-
ance with unit nameplate ratings.
___Unit is electrically grounded and circuit protection is
the correct size.
___Low voltage control wiring is correct as per unit wir-
ing diagram.
___Riser loop system is clean, filled, and vented of any
air.
___Chassis unit high and low pressure caps are firmly
secure and in place.
___Chassis matches the cabinet model number.
___Protective cardboard air coil cover is removed and
unit service cover panel and filter are in place.
___There is a proper seal between chassis service cov-
er panel and unit cabinet.
___Riser shut-off valves are in the OPEN position.
___Riser loop system has been vented for any air intro-
duced during chassis installation.
___Riser loop water is circulating through all units and at
design conditions.
___Unit condensate drain hose is securely attached to
drain pan and condensate riser.
___Indoor unit blower spins freely.
___All ductwork is complete.
___Clean filters are installed.
___All cutting, sanding, drywalling, patching work is
complete.
___Unit blower spins freely.
___Thermostat is in the OFF position.
INITIAL UNIT START-UP
1. Close disconnect switch.
2. Set thermostat to a high setting (above current room
temperature), set system to COOL with fan on AU-
TO. The compressor should not run.
3. Lower the thermostat temperature setting until the
fan and compressor energize. Verify the following
results:
• Leaving water temperature (LWT) in the heat ex-
changer water coil is warmer than the entering water temperature (EWT) by approximately 9oF—12
o
F.
• Blower is running smoothly.
• Compressor and blower amps are within nameplate
data.
• Suction line is cool and no frosting is forming in the
refrigeration circuit.
4. Set thermostat to the OFF position. Unit compressor
and fan should stop running.
5. Allow the system to equalize for approximately 5
minutes.
6. Set thermostat to the lowest setting and switch to
the HEAT position.
7. Adjust thermostat temperature higher until the fan
and compressor energize. The following should
occur:
• Warm air will flow from the supply register.
• Leaving water temperature (LWT) in the heat ex-
changer water coil is cooler than the entering water
temperature (EWT) by approximately 5oF—9
o
F.
• Blower and compressor operation is smooth and no
frost development is visible in the refrigeration cir-
cuit.
8. Set the thermostat to the desired temperature.
9. Check for any water leaks at the hose connections.
OMEGA-VSHP.F-I OM-1907
www.omega-heatpump.com 10
8. CONTROLS
MICROPROCESSOR CONTROLLER
DIP Switch Settings
Controller DIP switch contains 6 switches for setting up
thermostat, Fan, and system settings. Microprocessor
DIP settings are factory set. Make changes if warranted
by site conditions. Below are the 6 settings:
Table 3: DIP Switch Settings
Heat Pump Thermostat
Set DIP #1 to the “ON” position for Heat Pump Thermostat. Refer to the following table for connecting thermo-
stat to unit terminal blocks:
Table 4: Heat Pump Thermostat Connections
Heat/Cool Thermostat
Set DIP #1 set to the “OFF” position for conventional
HEAT/COOL Thermostat. Refer to the following wiring
table for connecting HEAT/COOL thermostats to unit
terminal blocks:
Table 5: Heat/Cool Thermostat Connections
Thermostat Cable
Unit comes with a 24 inch long standard 6-wire thermo-
stat cable. This cable is factory wired to TB1 and TB2
terminal blocks on the controller board. Wire other end
of pigtails to thermostat. A minimum 4-wire thermostat
cable is required for single speed thermostats. A field
supplied 7-wire thermostat cable is required if 3-speed
fan control is required from a 3-speed thermostat. See
Figure 24: Thermostat Wiring Detail.
Multi Fan Speed Thermostat
If connecting thermostats with 3 speed control at the
thermostat, DIP switch #6 (FanMode) should be set to
the “ON” position. This will ignore the position of the unit
mounted fan speed selector switch. Fan speed will be
controlled by thermostat. Connect thermostat fan speed
control wiring to the G1,G2, and G3 terminals as shown
below. Fan speed is determined by the G1,G2, and G3
signals from the thermostat:
G1 Signal = LOW fan speed enabled.
G2 Signal = MEDIUM fan speed enabled.
G3 Signal = HIGH fan speed enabled.
Single Speed Thermostat
If connecting thermostats with single speed control at
the thermostat set DIP switch #6 to the “OFF” position,
In this mode thermostat can be connected to any of the
G1,G2, and G3 terminals and a “Run Fan” request from
thermostat will energize the fan to a speed determined
by the position of the unit mounted 3-speed fan selector
switch:
L = LOW fan speed
M = MEDIUM fan speed
HI = HIGH fan speed
Fan Control with PSC Motors
Fan speed for units with PSC motors is set using each of
the built-in motor speeds and are selected by either set-
ting the fan speed using the unit mounted fan speed
selector switch or a thermostat with 3-speed fan control
capability. See electrical schematic in Figure 22.
Fan Control with EC Motors (ECM)
Low voltage PULSE WIDTH MODULATED (PWM) signal is utilized to control motor speed between 0 and
100% of full speed. The controller has been programmed to use 3 preprogrammed speeds for Low, Me-
dium and High. See electrical schematic in Figure 23.
Whisper Mode (ECM Only)
Whisper mode runs fan a pre-determined low fan speed
for continuous air circulation. Field wire R1 and G1 with
DIP DESCRIPTION OFF ON
1 Tstat Type Heat/Cool Tstat HeatPump Tstat
2 HP Type Hybrid HP Std Heat Pump
3 FlowType Variable Flow Constant Flow
4 Coax Valve Coax Valve NO Coax Valve NC
HeatCoil Valve NO Heat Coil Valve NC
RV Energized to Heat RV Energized to Cool
6 FanMode Fan Auto Fan Manual
NO = Normally Open and NC = Normall Closed
5
Reversing Valve
(RV)/ HeatCoil
DIP 1 (ON) = HeatPump Thermostat
TERMINAL
BLOCK
WIRE DESCRIPTION
TB1 #4 R 24VAC – Line (R)
TB1 #3 G1 Fan Speed 1 - Low Speed
TB1 #2 G2 Fan Speed 2 - Medium Speed
TB1 #1 G3 Fan Speed 3 - High Speed
TB2 #3 Y Call for Compressor
TB2 #2 O/B Call for Reversing Valve
TB2 #1 C Common
DIP 1 (OFF) = HEAT/COOL Thermostat
TERMINAL
BLOCK
WIRE DESCRIPTION
TB1-4 R 24VAC – Line – (R)
TB1-3 G1 Fan Speed 1 - Low Speed
TB1-2 G2 Fan Speed 2 - Medium Speed
TB1-3 G3 Fan Speed 3 - High Speed
TB2-3 Y Call for Cooling
TB2-2 O/B Call for Heating
TB2-1 C Common
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