Bosch SM024 User manual

Installation, Operation, and Maintenance Manual
Greensource CDi Series SM Model Water-to-Air Heat Pumps
Greensource
8733819578 (2019/02)
SM024 | SM036 | SM048 | SM060 | SM070

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
2 |
Subject to change without prior notice
CONTENTS
Document Conventions .......................................................4
Key to Symbols............................................................ 4
Safety Warnings..................................................................4
Model Nomenclature ...........................................................5
General Description ............................................................6
Inspecting and Storing the Equipment ..................................7
Moving and Storage ..................................................... 7
Initial Inspection.......................................................... 7
Standard Package........................................................ 7
Unit Installation ..................................................................8
Location Selection...............................................................8
Blower Configurations.........................................................8
Horizontal (HZ) Blower Configuration ............................. 8
Vertical (VT) Blower Configuration ............................... 14
Return and Discharge Air Duct Flanges Preparation.............14
Corner Cap Installation Instructions (for HZ Units Only).......14
Mounting Vertical (VT) Units..............................................16
Mounting horizontal (HZ) Units ..........................................16
Hanging Bracket Kit ..........................................................16
Installation Instructions .............................................. 16
Condensate Drain .............................................................18
Duct System .....................................................................18
Piping...............................................................................18
Electrical ..........................................................................21
Electrical Component Box........................................... 21
Alarm Terminal Wiring ................................................ 21
Electronic Thermostat .......................................................21
Installation................................................................ 21
Heat Recovery Package (HRP) Setup..................................22
Water Tank Preparation .............................................. 22
HRP Water Piping ...................................................... 22
Water Tank Refill........................................................ 23
Specific Application Considerations ...................................24
Well Water Systems ................................................... 24
Cooling Tower/Boiler Systems..................................... 25
Geothermal Systems.................................................. 26
Post-Installation System Checkout .....................................27
Unit Start-up.....................................................................27
Initial Start-Up of a HRP System ...................................27
Unit Configuration.............................................................28
Bosch EasyStart App.................................................. 28
Settings....................................................................28
Alarm Mode...............................................................29
Fan Motor .................................................................29
Configurable Hard Lockout ..........................................29
System Operation ............................................................. 30
Timers and Faults.......................................................30
Sequence of Operation ...............................................30
Fan Operation ...........................................................31
Loop Pump Operation.................................................31
Reversing Valve Operation...........................................32
Comfort Mode ...........................................................32
Economy Mode ..........................................................32
Emergency Heating Mode............................................32
Heat Recovery Package (HRP)......................................32
Dehumidification .......................................................33
Latching Mode Operation ............................................33
Unlatching Mode (Factory Default) ...............................33
System Protection ............................................................ 34
Consumer Enhanced Security ......................................34
Compressor Demand (Y1 Call).....................................34
Pressure Protection....................................................34
Brownout Protection ..................................................35
Low Loop Water Protection Control (LLWPC) (Boilerless
Control)....................................................................35
Water Flow Detection .................................................35
Sensor Monitoring......................................................35
Options ............................................................................ 40
Electric Heat..............................................................40
Smart Start Assist ......................................................40
Smart Start Assist Specifications..................................41
Smart Start Assist Modes of Operations ........................41
Loop Pump Control (former Pump Valve Relay Kit)..........43
Wireless Interface Module (WIM)....................................... 44
Troubleshooting ............................................................... 45
HPC LED Status Indicator (Blink Code) Information.........45
Compressor Ohms .....................................................45
Unit Troubleshooting......................................................... 46
Unit Noise Troubleshooting..........................................52
HRP Troubleshooting..................................................53
Smart Start Assist Troubleshooting...............................54
Smart Start Assist Flashing Sequence ...........................54
Water Side Pressure Drop Table for HZ Units..................55
Water Side Pressure Drop Table for VT Units ..................56
Maintenance .................................................................... 57
Wiring Diagrams ............................................................... 58
Thermostat Connections ................................................... 61
Alarm Terminal Wiring ...................................................... 61
Basic Piping Diagram..................................................62
Dimensional Drawings.......................................................63
Horizontal—Straight-Through Configuration ...................63
Horizontal—Hanging Bracket Locations..........................64
Vertical Dimensional Drawing.......................................65

| 3Greensource CDi Series SM Model
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Exploded Views.................................................................66
HZ Unit Exploded View ............................................... 67
VT Unit Exploded View................................................ 68
Terminology .....................................................................69
Acronyms ................................................................. 69
Terms ...................................................................... 69
Spare Parts List................................................................. 70
Wiring Harness.......................................................... 70
Electrical Box Typical Layout and Spare Parts List........... 74
Refrigeration Components ................................................76
Rev. C HZ ................................................................. 76
Rev. C VT.................................................................. 77
Decommissioning Information ........................................... 78
Protecting the Environment......................................... 78
Check-Out Sheet...............................................................79
EasyStart Check-Out Sheet................................................80
Notes ...............................................................................81

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
4 | Document Conventions
Subject to change without prior notice
DOCUMENT CONVENTIONS
Key to Symbols
Warnings
The following keywords are defined and can be
used in this document:
•DANGER indicates a situation that, if not
avoided, will result in death or serious injury.
•WARNING indicates a situation that, if not avoided,
could result in death or serious injury.
•CAUTION indicates a situation that, if not avoided,
could result in minor to moderate injury.
•NOTICE is used to address practices not related to
personal injury.
Important Information
SAFETY WARNINGS
Warnings in this document are identified by
a warning triangle printed against a gray
background. Keywords at the start of the
warning indicate the type and seriousness
of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information
where there is no risk to property or people.
IMPORTANT: Read the entire instruction
manual before starting installation.
WARNING: Installation and servicing of this
equipment can be hazardous due to system
pressure and electrical components. Only
trained and qualified personnel should
install, repair, or service the equipment.
WARNING: Before performing service or
maintenance operations on the system, turn
off main power to the unit. Electrical shock
could cause personal injury or death.
CAUTION: When working on equipment,
always observe precautions described in
the literature, tags, and labels attached to
the unit. Follow all safety codes. Wear
safety glasses and work gloves. Use a
quenching cloth for brazing, and place a fire
extinguisher close to the work area.
NOTICE: To avoid the release of refrigerant
into the atmosphere, the refrigerant circuit
of this unit must be serviced only by
technicians who meet local, state, and
federal proficiency requirements.
NOTICE: 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. If a compressor
is removed from this unit, refrigerant circuit
oil will remain in the compressor. To avoid
leakage of compressor oil, refrigerant lines
of the compressor must be sealed after it is
removed.
NOTICE: To avoid equipment damage, DO
NOT use these units as a source of heating
or cooling during the construction process.
Doing so may affect the unit's warranty. The
mechanical components and filters will
quickly become clogged with construction
dirt and debris, which may cause system
damage or failure.
WARNING: This product can expose you to
chemicals including Lead and Lead
components, which are known to the State
of California to cause cancer and birth
defects or other reproductive harm.
For more information go to
www.P65Warnings.ca.gov.

Model Nomenclature | 5Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
MODEL NOMENCLATURE
Fig. 1 Model Nomenclature
12 34567 8910111213141516171819202122232425262728293031323334353637383940
SM024-1VTC - F L TADC - XMGXXXXXD7XXXX5XXXXSBA
SM PREMIUM SERIES SIZE
024, 036, 048, 060, 070
VOLTAGE 1 208-230/60/1
CABINET CONFIGURATION
HZ- HORIZONTAL
VT- VERTICAL
COAX OPTIONS
C- COPPER
N- CUPRO-NICKEL
WATER CONNECTIONS
F- FRONT
RETURN AIR CONFIGURATION
L- LEFT
R- RIGHT
DISCHARGE AIR CONFIGURATION
T- TOP (VT ONLY) E- END (HZ ONLY)
FAN/MOTOR OPTIONS
A- CONSTANT AIRFLOW ECM
AIR COIL D- DUOGUARD/SS DRAIN PAN (VT ONLY) T- TIN PLATED (HZ ONLY)
REVISION LEVEL
B- ( VT ONLY)
A- (HZ ONLY)
CODE STRING LEVEL
CHANNEL B- BOSCH
STANDARD/SPECIAL S- STANDARD
AGENCY OPTIONS
X- ETL (UL 1995)
OPEN
DRIVE SPEED
X- N/A
ELECTRIC HEAT
X- NONE
CABINET CONSTRUCTION
M- PAINTED STEEL/ ½” CLOSED CELL FOAM, EXTRA QUIET (TO INCLUDE
COMPRESSOR BLANKET AS STANDARD) (VT & CF ONLY)
H- PAINTED STEEL/ ½” CLOSED CELL FOAM (HZ ONLY)
APPLICATION
G- EXTENDED RANGE
GENERAL ELECTRICAL OPTIONS (UP TO 5 AVAILABLE PER UNIT)
X- AS DEFAULT FOR NON USED ELECTRICAL CODES
REFRIGERATION CIRCUIT OPTIONS
D- HEAT RECOVERY PACKAGE
MOTOR HP/QTY X- N/A
AIR FILTRATION 4- MERV8 - 2" w/ 4-SIDED FILTER RACK (REV B&C, VT cŽŶĮguraƟon)
5- MERV13 - 2" w/4-SIDED FILTER RACK (REV A&C, HZ cŽŶĮguraƟon)
ECONOMIZER X- NONE
WATER FLOW CONTROL OPTIONS X- NONE
OPEN
CONTROLS
H- HEAT PUMP CONTROL
TRANSFORMER
7-75 VA
C- ( VT & HZ)

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
6 | General Description
Subject to change without prior notice
GENERAL DESCRIPTION
The Greensource CDi Series SM Model Water-to-
Air Heat Pumps provide the best combination of
performance and efficiency available. The heat
pump comes equipped with Bosch’s commitment
to Creative Design and Innovation (CDi).
All units are performance certified to American
Heating and Refrigeration Institute (AHRI) ISO
Standard 13256-1. All SM units conform to UL1995
standard and are certified to CAN/CSA C22.2 No
236 by Intertek-ETL. The SM units are designed to
operate with entering fluid temperature between
20°F to 80°F in the heating mode and between
40°F to 110°F in the cooling mode for continuous
operations.
SM Series Water-to-Air Heat Pumps are available in
Vertical (VT) and Horizontal (HZ) configurations.
HZ units can be field configured from end blow to
straight through using a field-installed accessory
kit. See page #8 for more information.
A limited number of field-installed options are
available:
• Thermostats
• Internally-mounted Electric Heat Kits (5kW, 10kW,
15kW, and 20kW)
• Smart Start Assist
• HZ Discharge Air Conversion Kit
• Stainless Steel Hose Kits
• Flow Centers
• Swivel Fittings
See page #40 for details.
Safety devices are built into each unit to provide
the maximum system protection possible when
properly installed and maintained. Each unit has an
externally-mounted Wireless Interface Module
(WIM) that allows a technician to commission and
troubleshoot the unit wirelessly via Wi-Fi.
The basic Horizontal (HZ) unit layout and
connections are shown in Fig. 2. Refer to
Dimensional Drawings for further detail, as well as
Vertical (VT) unit details. See page #63 to
page #65.
Fig. 2
[1] Wireless Interface Module (WIM)
[2] Blower access panel
[3] Condensing section access panel
[4] Condensate drain connection
[5] Water connection, Swivel type (VT—field installed,
HZ—factory installed). Refer to piping on page #18.
[6] Heat Recovery water connection
[7] Heat Recovery disconnect switch
[8] Electrical connection knockout
[9] Electrical connection knockout for field-installed
Electric Heat
[10] Blower outlet (based on discharged air
configuration)
A heat pump operating under extreme
conditions will have limitations on air/fluid flow
rates and/or temperatures.
NOTICE: 50° F Minimum Entering Water
Temperature (EWT) is recommended for
well water applications with sufficient
water flow to prevent freezing. Antifreeze
solution is required for all closed-loop
applications and EWT below 50°F.
Geothermal applications should have
sufficient antifreeze solution to protect
against extreme conditions and equipment
failure. Frozen water coils are not covered
under warranty. Other equivalent methods
of temperature control are acceptable.
1
2
3
4
5
6
7
910
3
8

Inspecting and Storing the Equipment | 7Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
INSPECTING AND STORING THE
EQUIPMENT
Moving and Storage
If the equipment is not needed for immediate
installation upon its arrival at the job site, it should
be left in its shipping carton and stored in a clean
and dry area. Units must only be stored or moved
in the normal upright position as indicated by the
“UP” arrows on each carton at all times.
Initial Inspection
Inspect the product carefully for any defects or
discrepancies.
Should you identify any issue, contact the Bosch
Wholesaler/Distributor from which you purchased
the unit.
Standard Package
Fig. 3 SM Series Water-to-Air Heat Pump
Fig. 4 Installation and Operation Manual (Note: Actual IOM may differ
from the above photo.)
Fig. 5 Corner Caps Package (HZ units only)
Fig. 6 Hanging Bracket kit (HZ units only)
Fig. 7 Field-Installed Swivel Fittings (VT units only)
NOTICE: Never lift or move units by filter
racks, external piping, or attached options/
accessories.
WARNING: Follow instructions for stacking
limit for transit as well as storage as per unit
packaging label.

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
8 | Unit Installation
Subject to change without prior notice
UNIT INSTALLATION
This section contains information on the following:
• Location Selection—page #8
• Blower Configurations—page #8
• Return and Discharge Air Duct Flange
Preparation—page #14
• Corner Cap Installation (for HZ only)—page #14
• Mounting Vertical (VT) Units—page #16
• Mounting horizontal (HZ) Units—page #16
• Hanging Bracket Kit—page #16
• Condensate Drain—page #18
• Duct System—page #18
• Piping—page #18
• Electrical—page #21
• Electronic Thermostat Installation—page #21
• Heat Recovery Package (HRP) Setup—page #22
• Specific Application Considerations—page #24
• Post-Installation System Checkout—page #27
• Unit Start-up—page #27
LOCATION SELECTION
Install the unit in an indoor area that allows easy
removal of the filter and access panels, and has
enough room for service personnel to perform
maintenance or repair. Provide sufficient room to
make fluid, electrical, and duct connection(s). If
the unit is located in a confined space such as a
closet, provisions must be made for the return air
to freely enter the face of the unit’s air coil. On
horizontal units, allow adequate room below the
unit for a condensate drain trap and do not locate
the unit above supply piping.
Service clearance for SM units up to 6 tons
includes the following recommendations.
• 18" minimum, 24" optimum in front of the
blower access panel for access to the blower
and blower motor if needed.
• 24" minimum, 36" optimum in front of the front
access panel for access to electrical
components, compressor, and service valves if
needed.
BLOWER CONFIGURATIONS
Horizontal (HZ) Blower Configuration
The HZ configuration water source heat pump is
designed to have a field-configurable blower
orientation: end blow to straight through. An
accessory kit is required to make this conversion.
Table 1 Conversion Kit Part Numbers Required
Fig. 8
Fig. 9
NOTICE: These units are not approved for
outdoor installation; therefore, they must
be installed inside a structure in a
conditioned space. Do not locate in areas
that are subject to freezing.
NOTICE: Discharge air configuration change
is not possible on Heat Pumps equipped
with field-installed Electric Heat (end blow).
Part # FLE to FLS End
to Straight
Through
FRE to FRS
End to Straight
Through
SM024 HZ 8733951152 8733951155
SM036/048 HZ 8733951153 8733951156
SM060/070 HZ 8733951154 8733951157

Blower Configurations | 9Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
Required Tools
• 5/16" hex head driver
• 3/8" hex head driver
• 7/16" hex head driver
• Flat screw driver
• Phillips screw driver
• 1/4" hex head driver
• Needle nose pliers
• 5/16"–1/4" ratchet wrench
Instructions—Left-Hand Unit (SM0**-1HZ-*L*-**)
1. Remove and discard the end [1] and side [2]
panels. (See Fig. 10.)
Fig. 10
2. Disconnect the blower motor wiring and
ground wire fastened to blower housing. (See
Fig. 11.)
Fig. 11
3. Remove the bracket by removing the three
screws securing it and retain the bracket. (See
Fig. 12.)
Fig. 12
4. Loosen the blower assembly by removing the
four screws securing it. (See Fig. 13.)
Fig. 13
5. Remove the bracket by removing the two
screws securing it and retain the bracket. (See
Fig. 14.)
Fig. 14
Left-hand and right-hand Horizontal (HZ) units
have different Blower Configuration instructions.
Left-hand unit instructions refer to page #9 and
right-hand unit instructions refer to page #11.
Blower configuration changes should be done
prior to unit being installed in the final location.



Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
10 | Blower Configurations
Subject to change without prior notice
6. Rotate the blower into its new position. (See
Fig. 15.)
Fig. 15
7. Remove the remaining bracket by removing the
two screws securing it and retain the bracket.
(See Fig. 16.)
Fig. 16
8. Remove the blower assembly by sliding it
forward. (See Fig. 17.)
Fig. 17
9. Remove the blower collar by removing the
eight screws securing it and discard. (See Fig.
18.)
Fig. 18
10. Reorient the blower assembly 180 degree with
the blower “belly” down [1] and slide it back
into the cabinet [2]. (See Fig. 19.)
Fig. 19
The unit’s top is notched to allow blower to slide
through.





Blower Configurations | 11Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
11. Reinstall the bracket in its new vertical
position using two screws. (See Fig. 20.)
Fig. 20
12. Reinstall the bracket removed in step Fig. 3 to
the same location using three screws. (See Fig.
21.)
Fig. 21
13. Reinstall the remaining bracket using two
screws. (See Fig. 22.)
Fig. 22
14. Connect the vertical and horizontal brackets
using four screws. (See Fig. 23.)
Fig. 23
15. Reconnect blower motor wiring and ground
wire.
16. Install the new blower panel from the
accessory kit.
Instructions—Right-Hand Unit (SM0**-1HZ-*R*-**)
1. Remove and retain end and side panels. (See
Fig. 24.)
Fig. 24



Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
12 | Blower Configurations
Subject to change without prior notice
2. Disconnect blower motor wiring and ground
wire fastened to blower housing. (See Fig. 25.)
Fig. 25
3. Remove and retain the four screws under the
blower collar. (See Fig. 26.)
Fig. 26
4. Slide the blower assembly away from mounting
bracket. (See Fig. 27.)
Fig. 27
5. Remove one vertical bracket by removing the
two screws and retain the bracket. (See Fig.
28.)
Fig. 28
6. Remove the horizontal blower bracket by
removing the three screws and discard. (See
Fig. 29.)
NOTICE: The air coil is in close proximity to
the blower. The air coil fins are easily
damaged. Great care must be taken during
this step to avoid coil damage. Shipping
cardboard can be used as protection during
blower removal and installation.

Blower Configurations | 13Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
Fig. 29
7. Rotate the blower into its new position. (See
Fig. 30.)
Fig. 30
8. Remove the remaining vertical blower bracket
by removing the two screws and retain. (See
Fig. 31.)
Fig. 31
9. Remove the blower assembly by sliding it
forward. (See Fig. 32.)
Fig. 32
10. Remove the blower collar by removing its eight
screws and discard the collar. (See Fig. 33.)
Fig. 33
11. Reorient the blower assembly 180 degree with
the blower “belly” up. (See Fig. 34.)
Fig. 34
12. Slide the blower back into the cabinet. (See
Fig. 35.)
The unit’s top is notched to allow blower to slide
through.

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
14 | Return and Discharge Air Duct Flanges Preparation
Subject to change without prior notice
Fig. 35
13. Reinstall the two vertical blower brackets in
the new horizontal position using four screws.
(See Fig. 36.)
Fig. 36
14. Secure the two horizontal blower brackets to
the unit base using four screws. (See
Fig. 37.)
Fig. 37
15. Reconnect blower motor wiring and ground
wire.
16. Install the new blower panel from the
accessory kit.
Vertical (VT) Blower Configuration
The Vertical (VT) configuration water source heat
pump is a dedicated up-flow configuration.
Available from the factory in left-hand and right-
hand return air configurations.
RETURN AND DISCHARGE AIR DUCT
FLANGES PREPARATION
Return and Discharge Air Duct Flanges are shipped
unfolded. Flange bend lines are perforated
allowing easy bending using standard sheet metal
pliers or channel locks. (See Fig. 38.)
Fig. 38
Fold the duct flanges outwards along the
perforated lines.
CORNER CAP INSTALLATION
INSTRUCTIONS (FOR HZ UNITS ONLY)
Each corner cap is stamped with one the following
identifiers: T, T1,T2 B, B1, B2, A.
1. Identify Letter code on each corner cap. (See
Fig. 39.)
Bend flanges one at a time.
Corner cap installation only applies to HZ units.
VT units do not require corner caps.

Corner Cap Installation Instructions (for HZ Units Only) | 15Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
Fig. 39
2. In preparation for installation identify each
corner cap location. (See Fig. 40.)
Fig. 40
3. Remove adhesive backing and install each
corner cap. (See Fig. 41 and Fig. 42.)
Fig. 41
Fig. 42
Ensure cabinet surface is clean and free of
debris to ensure proper corner cap adhesion.
T1
T1
T2
T2
A
A
A
A

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
16 | Mounting Vertical (VT) Units
Subject to change without prior notice
MOUNTING VERTICAL (VT) UNITS
VT units should be mounted level on a vibration
absorbing pad slightly larger than the base to
minimize vibration transmission to the building
structure. It is not necessary to anchor the unit to
the floor. (See Fig. 43.)
Fig. 43
MOUNTING HORIZONTAL (HZ) UNITS
While HZ units may be installed on any level
surface strong enough to hold their weight, they
are typically suspended above a ceiling by
threaded rods. The manufacturer recommends
these be attached to the unit corners using a
hanging bracket kit supplied with HZ units. The
rods must be securely anchored to the ceiling.
Refer to the hanging bracket assembly and
installation instructions for details.
Plumbing connected to the heat pump must not
come in direct contact with joists, trusses, walls,
etc. Some applications require an attic floor
installation of the horizontal unit. In those cases,
the unit should be set in a full-sized secondary
drain pan on top of a vibration absorbing mesh.
Fig. 44
HANGING BRACKET KIT
Installation Instructions
All HZ units come with hanging bracket installation
kit to facilitate suspended unit mounting using
threaded rod. Hanging brackets are to be installed
as shown in Fig. 45.
The vibration absorbing pad is not supplied with
the unit.
On VT units, the condensate drain pan is
internally sloped. There is no internal P-Trap.
NOTICE: Vertical Units should be mounted
on a vibration absorbing pad. The unit must
be supported along the entirety of its base.
VIBRATION
PAD FULL SIZE
NOTICE: Horizontal units installed above
the ceiling must conform to all local codes.
An auxiliary drain pan, if required by code,
should be at least four inches larger than
the bottom of the heat pump.
The HZ units condensate drain pans are NOT
internally sloped.
NOTICE: HZ units must be installed pitched
approximately 1/4" towards the condensate
drain connection in both directions to
facilitate condensate removal. (See Fig. 44.)

Hanging Bracket Kit | 17Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
Fig. 45
This kit includes the following:
(5) Brackets
(5) Rubber Vibration Isolators
(8) Screws: #10 x 1/2 (not used for these models)
(10) Bolts: 1/4–28 x 12” Hex bolt
The following are needed and are to be field
provided:
• Threaded rod (3/8” max. dia.)
• Hex nuts
• Washers (1-3/4” min. O.D.)
1. Remove and discard factory provided screws
from locations where hanging brackets will be
installed as shown in Fig. 46.
Fig. 46
2. Mount the five brackets to unit corner post using
the bolts provided in the kit as shown in
Fig. 47.
Fig. 47
3. Install rubber grommet onto the brackets as
shown in Fig. 48.
4. Hang the unit and assemble the field-provided
threaded rod, nuts, and washers on to the
brackets as shown in Fig. 48.
Fig. 48
WARNING: Follow all applicable codes and
requirements when hanging this unit and
selecting the threaded rod material, etc.
WARNING: Do NOT reuse screws removed
from the unit in Step #1 to mount the
hanging brackets to the unit.
WARNING: The rods must be securely
anchored to the ceiling.

Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
18 | Condensate Drain
Subject to change without prior notice
CONDENSATE DRAIN
A drain line must be connected to the heat pump
and pitched away from the unit a minimum of 1/8”
per foot to allow the condensate to flow away from
the unit.
This connection must be in conformance with local
plumbing codes. A trap must be installed in the
condensate line to ensure free condensate flow.
A vertical air vent is sometimes required to avoid
air pockets. The length of the trap depends on the
amount of positive or negative pressure that is on
the drain pan. A second trap must not be included.
(See Fig. 49.)
Fig. 49
DUCT SYSTEM
A supply air outlet collar and return air duct flanges
are provided on all units to facilitate duct
connections.
Refer to unit Dimensional Drawings for physical
dimensions of the collar and flange. (See page #63
through page #65.)
A flexible connector is recommended for supply
and return air duct connections on metal duct
systems. All metal ducting should be insulated
with a minimum of 1-inch duct insulation to avoid
heat loss or gain and prevent condensate forming
during the cooling operation. Application of the
unit to uninsulated duct work is not recommended
as the unit’s performance will be adversely
affected.
The factory-provided air filter must be removed
when using a filter back return air grill. The factory
filter should be left in place on a free return
system.
If the unit will be installed in a new installation that
includes new duct work, the installation should be
designed using current ASHRAE procedures for
duct sizing. If the unit is to be connected to
existing duct work, a check should be made to
ensure that the duct system has the capacity to
handle the air required for the unit’s application. If
the duct system is too small, larger duct work
should be installed. Check for any leaks in the
existing duct work and repair as needed.
The duct system and all diffusers should be sized
to handle the designed air flow quietly. To
maximize sound attenuation of the unit blower, the
supply and return air plenums should be insulated.
There should be no direct straight air path through
the return air grille into the heat pump. The return
air inlet to the heat pump must have at least one 90
degree turn away from the space return air grill. If
air noise or excessive air flow are a problem, the
blower speed can be changed to a lower speed to
reduce air flow.
PIPING
Supply and return piping must be as large as the
unit connections on the heat pump (larger on long
runs).
Flexible hoses should be used between the unit
and the rigid system to avoid possible vibration.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing.
SM units are supplied with either a copper or
optional cupro-nickel condenser. Copper is
adequate for ground water that is not high in
mineral content.
Supply air duct and return air duct flanges are
shipped unfolded with the unit. They need to be
folded. See “Return and Discharge Air Duct
Flanges” on page #14 for details.
NOTICE: Do not connect discharge ducts
directly to the blower outlet.
NOTICE: Never use flexible hoses of a
smaller inside diameter than that of the
fluid connections on the unit.

Piping | 19Greensource CDi Series SM Model
8733819578 (2019/02)Greensource CDi Series SM Model Subject to change without prior notice
In conditions anticipating moderate scale
formation or in brackish water, a cupro-nickel heat
exchanger is recommended. (Refer to the water
quality table on page #20.) Water quality must
meet the standards stated in the table. Both the
supply and discharge water lines will sweat if
subjected to low water temperature. These lines
should be insulated to prevent damage from
condensation. All manual flow valves used in the
system must be ball valves. Globe and gate valves
must not be used due to high-pressure drops and
poor throttling characteristics.
Always check carefully for water leaks and repair
appropriately. Units are equipped with swivel
female pipe thread fittings. Swivel fittings are used
in typical residential installation where water
pressure ratings are below 125 psi. For
higher-pressure ratings that are typical to
commercial installations, swivel fittings MUST not
be used. (For VT units, the swivel fitting is shipped
loose. For HZ units, the fitting is factory brazed.)
Consult Unit Dimensional Drawings on page #63
through page #65.
Swivel Fitting Gasket Installation
Swivel fittings include a gasket that must be used.
To install, remove the gasket from the plastic bag
attached to the swivel fitting, align the gasket with
swivel fitting, and push in until fully seated. See
Fig. 50.
Fig. 50
[1] Plastic bag
[2] Align gasket
[3] Push in to seat gasket
NOTICE: Proper testing is required to
ensure the well water quality is suitable for
use with water source equipment. When in
doubt, use cupro-nickel.
NOTICE: Never exceed the recommended
water flow rates as serious damage or
erosion of the water-to-refrigerant heat
exchanger could occur.
Water side pressure rating is 450 psi for FPT
fittings and 125 psi for field or factory-installed
swivel fittings.
NOTICE: Do not overtighten the
connections.
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Greensource CDi Series SM
Greensource CDi Series SM Model8733819578 (2019/02)
20 | Piping
Subject to change without prior notice
Table 2 Water Quality
Water Quality
POTENTIAL
PROBLEM
Water Characteristic Acceptable Value
Copper Cupro-Nickel
pH (Acidity/Alkalinity) 7–9 7–9
SCALING Hardness (CaCO3,
MgCO3) < 350 ppm < 350 ppm
Ryznar Stability Index 6.0–7.5 6.0–7.5
Langelier Saturation Index -0.5 – +0.5 -0.5 – +0.5
CORROSION Hydrogen Sulfide (H2S) < 0.5 ppm* 10–50 ppm
Sulfates < 125 ppm < 125 ppm
Chlorine < 0.5 ppm < 0.5 ppm
Chlorides < 20 ppm < 150 ppm
Carbon Dioxide < 50 ppm < 50 ppm
Ammonia < 2 ppm < 2 ppm
Ammonia Chloride < 0.5 ppm < 0.5 ppm
Ammonia Nitrate < 0.5 ppm < 0.5 ppm
Ammonia Hydroxide < 0.5 ppm < 0.5 ppm
Ammonia Sulfate < 0.5 ppm < 0.5 ppm
Dissolved Solids < 1,000 ppm < 1,500 ppm
IRON FOULING Iron (Fe2+ Iron Bacteria
Potential) < 0.2 ppm < 0.2 ppm
Iron Oxide < 1 ppm < 1 ppm
EROSION Suspended Solids < 10 ppm, < 600 µm size** < 10 ppm, < 600 µm size**
Maximum Water Velocity 6 ft/sec 6 ft/sec
* No "rotten egg" smell present at < 0.5 ppm H2S.
** Equivalent to 30 mesh strainer