Hillphoenix SOLOCHILL DA091 Owner's manual

INSTALLATION AND OPERATION
Contents
Copyright© 2019 by Hillphoenix
All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means—
electronic or mechanical, including photocopying or recording; or any other information storage and retrieval
system—without express written permission from Hillphoenix.
P096412C ∙ V7 09/17/2019
Due to our commitment to continuous improvement, all specifications shown in this manual are subject to change without notice.
Section Title of Section Page
1.0 Important Notices...................................................... 3
2.0 General Information.................................................... 4
3.0 SoloChill Condensing Unit Information.................................. 5
3.1 Location of Control Board.............................................. 6
3.2 Location of Refrigeration Unit.......................................... 7
4.0 Water Supply Connections to Water Loop.............................. 8
5.0 Water Loop Pump Station.............................................. 10
6.0 Electrical Connections.................................................. 13
7.0 Communications and Network Connections............................ 24
8.0 Boss Local Supervisor.................................................. 32
8.1 Controls and Communication........................................... 34
9.0 Fascia Installation...................................................... 40
10.0 Differences Between SoloChill Cases and Standard Remote DX Cases. 41
11.0 SoloChill Unit Dimensions.............................................. 41
12.0 SoloChill Operational Setpoints ....................................... 44
13.0 SoloChill System Maintenance......................................... 44
------- Warranty............................................................... 45
Appx A Electrical and Communication Drawings................................ A-1
Appx B General Information.................................................... B-1
.

2SoloChill Micro-Distributed Condensing Unit
Thank You!
Hillphoenix cases with SoloChill™ Micro Distributed condensing units provide for a micro-distributed
remote DX system with minimized refrigerant charge due to the closely coupled condensing unit.
Each condensing unit is cooled by a field installed water-loop minimizing noise versus traditional air-
cooled self-contained cases.
Each case and condensing unit utilizes a comprehensive controls system which monitors the water
loop, condensing unit, and display case performance and adapts the variable speed condensing
unit to minimize energy and optimize performance. Each evaporator utilizes an Electronic Expansion
Valve (EEV) that is also integrated into the controls to further optimize performance and reduce the
labor time associated with traditional mechanical valve installations.
The controls system allows field networking of each case/condensing-unit controller to the store
executive controller. In addition, local networks (up to 6 control units) may be installed to create
case line-ups that defrost on a common schedule, similar to traditional refrigeration circuits of
traditional remote systems.

3
SoloChill Micro-Distributed Condensing Unit
1.0 Important Notices
We designate important information in all Hillphoenix installation and operations handbooks with
alert symbols. These notices provide information about potential dangers to personal health and
safety – as well as case damage – if these instructions are not carefully followed.
Service Notes
To ensure optimum case performance, we strongly recommend that Hillphoenix display cases
be installed and serviced by trained and qualified technicians who have experience working with
commercial refrigerated display cases and storage cabinets. For a list of Hillphoenix-authorized
installation and service contractors, visit hillphoenix.com/dealer-group.
ATTENTION!
Indicates important information that is
critical to proper system performance.
CAUTION!
Indicates the threat of potential injury if all
instructions are not followed carefully.
DANGER!
Indicates an immediate threat of serious injury
or death if all instructions are followed carefully.

4
SoloChill Micro-Distributed Condensing Unit
2.0 General Information
This manual covers general installation and operational information for the SoloChill™ Micro Distributed condensing
unit. Hillphoenix recommends you retain a copy for future reference
Store Conditions
Hillphoenix cases are designed to operate in AHRI conditions: a climate-controlled store that maintains a 75 oF
(24 oC) interior temperature and a maximum 55% relative humidity. Case operation will be adversely affected by
exposure to excessively high ambient temperatures and/or humidity.
Receiving Cases
Inspect cases carefully. In the event of shipping damage and/or shortages, please contact the Hillphoenix Service
parts Department at 800-283-1109.
Case Damage
Claims for damage must be: (1) noted on either the freight bill or the express receipt, and (2) signed by the carrier’s
agent. Otherwise, the carrier may refuse the claim. If damage becomes apparent after the cases are unpacked,
retain all packing materials and submit a written request (along with photos of the damage) to the carrier for
inspection within 14 days of receipt of the cases.
Missing Items
Hillphoenix cases are inspected before shipping to ensure the highest level of quality. Any claim for missing items
must be made to Hillphoenix within 48 hours of receipt of cases.
Technical Support
For technical support issues regarding this unit, contact the Hillphoenix
Case Division Technical Support at 800-283-1109.
Ordering Case Parts
If you need to contact Hillphoenix regarding specic xtures or parts, call 1-833-1 833-372-7871 and ask for Service Parts.
If the part does not have a barcode, provide the following information:
• Model number and serial number of the case for which the part is intended. The case serial number may be
found on the serial plate located inside the case on the top left panel.
• Length of the part, if applicable.
• Color of part (if painted) or color of polymer part.
• Whether the part is for a left-handed or a right -handed application.
• Quantity of parts
• Ship-to location.
If Hillphoenix Service Parts decides that a part must be returned instead of scrapped, you will be issued a Return
Material Authorization number.
Hillphoenix Part Barcode
Part Number located at bottom left.
1-833-372-7871

5
SoloChill Micro-Distributed Condensing Unit
3.0 SoloChill Condensing Unit Info
Location of Condensing Unit
The letters “QA” in the case model name indicate a case designed and built for use with the water-loop condensing
system For multi-deck cases, the water-loop condensing unit is pre-installed on the left rear top of the case. The unit
is adjacent to the electrical junction box at the left rear top of the case (see Fig. 1 below).
For the “QA” models of certain service or semi-vertical case types, the water-loop condensing unit is typically
mounted under the tank of the case.
These “QA” case models should be set in a manner similar to that used for typical cases; consult the appropriate
Installation Manual for the specic case models. Be cautious to avoid damaging the condensing units or any
refrigeration pipes outside the case, Damage may result from lifting the case under the condensing unit, or from
impacting door bulkheads, walls, and other obstructions. Be mindful of the asymmetric position and weight of the
condensing unit (nominally 150 to 200 lbs) when maneuvering the case into position.
CAUTION!
NEVER start any SoloChill-equipped case until the store’s
water-loop system has been connected, commissioned,
and confirmed to be operating correctly..
Fig. 1. Location of the SoloChill condenser on a multi-deck case.

6SoloChill Micro-Distributed Condensing Unit
3.1 Location of Control Board
Each condensing unit has a compartment on its left-hand side containing a HEOS control board (Carel) and electrical
connections. It is located behind/below the removable cover (see Fig. 2a). The cover for this electrical area should
be removed only by contractors responsible for servicing the unit. Also note the location of the inverter which
provides variable DC power to the brushless DC compressor (BLDC).
Access to the interior of the SoloChill unit may be obtained by removing several screws that hold the protective black
metal case that protects the interior components. This case/cover should always be reinstalled and returned to its
original location. In the right-had drawing above, note that the HEOS control board is mounted to the xed rear wall
of the SoloChill condensing units on all display cases. It will always be located in this position
SoloChill condensing units on island cases with 5 inch or 7 inch baseframes will require that the condensing unit be
mounted in a 2 foot (24 inch) pipe box positioned between cases in the lineup or in a remotely mounted location. In
such instances, the Heos control board may be positioned in an alternative orientation.
COMMUNICATION
CONNECTIONS
SERVICE
INTERFACE
PORT (RJ12)
PLD DISPLAY
ELECTRICAL
EGRESS, 4 PLACES
AC-TO-DC
INVERTER
(Carel)
HEOS
CONTROL
BOARD
(Carel)
PLD DISPLAY
(Carel)
Fig. 2a SoloChill Micro-Distributed, Water Cooled Condensing Unit:
Right Side Water Connections.

7
SoloChill Micro-Distributed Condensing Unit
3.2 Location of Refrigeration Components
The right-hand side of each SoloChill condensing unit has a compartment that contains all of the basic refrigeration
components. The removable cover protects these components. A second, smaller service cover is also provided at
the front right corner of the condensing unit for access to service valves (see Figures 3a and 3b below).
Field contractors typically should avoid removing the covers from the refrigeration section, However, if needed, the
service cover may be removed to access the service valves. Note that the water SUPPLY and RETURN lines for the
heat removal (condensing) pass through the right-hand side of the condensing unit. The refrigerant lines (suction and
discharge) are also located oh this end of the SoloChill condensing unit.
CONDENSER ELECTRONIC WATER
MODULATING VALVE
LIQUID RECEIVER
ACCUMULATOR
COMPRESSOR
HIGH PRESSURE SWITCH
REFRIGERATION
SERVICE VALVE
(LIQUID)
REFRIGERATION
SERVICE VALVE
(VAPOR)
Fig. 3a Location of Components within the SoloChill Condensing Unit.
REFRIGERANT
DISCHARGE
LIQUID 3/8”
REFRIGERANT
SUCTION
VAPOR 5/8”
RETURN WATER
LINE 3/4” MPT
REFRIGERATION SERVICE PORT
REFRIGERATION SERVICE PORT
SUPPLY WATER
LINE 3/4” MPT
Fig. 3b Location of Connections at the end of the SoloChill Condensing Unit.

8SoloChill Micro-Distributed Condensing Unit
4.0 Water Supply Connections
to Water Loop
For each SoloChill unit to perform its function of condensing the vapor refrigerant back into a liquid it must remove
heat from the refrigerant before it is returned to the display case or walk-in cooler or freezer. The actual condensing
unit is a brazed plate heat exchanger located within each SoloChill water-loop condensing unit. These brazed plate
heat exchangers are mounted inside of the refrigeration compartment of the SoloChill unit. There are a large number
of narrow passageways inside of the heat exchanger to allow uids to ow and for heat to be transferred from one
uid to the other. There are connections on the exterior, right-hand side of every SoloChill condensing unit to provide
a steady supply of water as part of the water cooling loop. A second connection is also located a short distance away
to provide a return ow of the water after it has absorbed heat in the condenser. Please examine these connections
as depicted in the Fig. 4 drawing below.
Shut-off valves are required on the store-installed water lines at both the SUPPLY and the RETURN of each
condensing unit (See the Fig. 4 drawing above). The installation of these valves permits the isolation of the individual
SoloChill condensing unit from the remainder of the water loop without any interruption of the water supply to other
SoloChill units being supplied with water from the water loop.
Fig. 4 Location of Water SUPPLY and RETURN Connections on a SoloChill Condensing Unit.
VIEW OF RIGHT END OF SOLOCHILL UNIT
WATER RETURN
3/4” MPT
WATER SUPPLY
3/4” MPT
SUCTION
REFRIGERANT
VAPOR
IN
DISCHARGE
REFRIGERANT
LIQUID
OUT

9
SoloChill Micro-Distributed Condensing Unit
4.0 Water Supply Connections
to Water Loop
For each SoloChill unit to perform its function of condensing the vapor refrigerant back into a liquid it must remove
heat from the refrigerant before it is returned to the display case or walk-in cooler or freezer. The actual condensing
unit is a brazed plate heat exchanger located within each SoloChill water-loop condensing unit. These brazed plate
heat exchangers are mounted inside of the refrigeration compartment of the SoloChill unit. There are a large number
of narrow passageways inside of the heat exchanger to allow uids to ow and for heat to be transferred from one
uid to the other. There are connections on the exterior, right-hand side of every SoloChill condensing unit to provide
a steady supply of water as part of the water cooling loop. A second connection is also located a short distance away
to provide a return ow of the water after it has absorbed heat in the condenser. Please examine these connections
as depicted in the Fig. 4 drawing below.
Shut-off valves are required on the store-installed water lines at both the SUPPLY and the RETURN of each
condensing unit (See the Fig. 4 drawing above). The installation of these valves permits the isolation of the individual
SoloChill condensing unit from the remainder of the water loop without any interruption of the water supply to other
SoloChill units being supplied with water from the water loop.
Fig. 4 Location of Water SUPPLY and RETURN Connections on a SoloChill Condensing Unit.
VIEW OF RIGHT END OF SOLOCHILL UNIT
WATER RETURN
3/4” MPT
WATER SUPPLY
3/4” MPT
SUCTION
REFRIGERANT
VAPOR
IN
DISCHARGE
REFRIGERANT
LIQUID
OUT
The shutoff valve on the SUPPLY line should also include a 20-mesh strainer (see Fig. 5 below).
.
Once the store water loop lines have all been plumbed per the store plan details, the water cooling system should
be commissioned and conrmed as operational prior to starting any individual display cases or condensing units.
Particular attention should be paid to the uid requirements of the system as these may differ between store site
installations (examples might be distilled water with treatments vs. inhibited glycol and water, etc.).
Prior to opening the valves and allowing water into the SoloChill condensing units, the water lines should be
thoroughly ushed to ensure any unwanted debris has been ushed out. It is recommended that the strainers be
serviced one week after system start-up to ensure a clear path exists for water ow to into the SoloChill unit and to
the heat exchanger.
Fig. 5. Orientation of Shut-off Valve with strainer. The valve and strainer are field-supplied, field-installed components.
Fig. 6 Shut-off Valve for Water RETURN to Water Loop, strainer is not required, also a field-supplied, field-installed component.

10
SoloChill Micro-Distributed Condensing Unit
5.0 Water Loop Pump Station
The drawing below is provided ONLY for purposes of an example of a generic pump station that may utilized to
provide motive power for circulation of water in the water loop. The actual pump station design may be different from
this example..
The water loop piping must supply water to every SoloChill unit in the supermarket. The piping runs in the
supermarket may be constructed using copper pipe as well as CPVC and/or PEX-A pipe. It will be necessary to
refer often to the architectural drawings for the piping layout designed for the store. Close consultation with these
drawings will aid in ensuring that all piping for the water loop is properly routed to the necessary locations where
main piping headers and branch lines are to be located. As noted in the diagram above, all RETURN water from all
SoloChill units must ultimately be directed to the main water return to the pump station. After having heat removed
from it, the water must then be directed to the SUPPLY piping that feeds all of the SUPPLY connections on all of the
SoloChill units.
Standard practices and procedures should always be followed for the installation of all water loop piping runs. This
applies to all piping and ttings used for the installation. To ensure the performance of a satisfactory, leak-free
installation, this piping should always be installed by a qualied, competent contractor who is familiar with hydronic
systems.
AV
AIR
VENT
EXPANSION
TANK
MAIN SYSTEM
DRAIN
MAIN SYSTEM
VENT
PUMP #1
PUMP #2
PUMP DIFFERENTIAL
PRESSURE SWITCH
DRAIN
CONNECTION
FILL TANK
OVERFLOW
P
AUTOMATIC
AIR SEPARATOR
TRIPLE DUTY
VALVE
TRIPLE DUTY
VALVE
WATER
RETURN
FROM
STORE
GAUGE
HEAT
REMOVED
FROM
WATER
LOOP
WATER
SUPPY
TO
STORE
FLUID
COOLER
OR
STORE
CHILLED
WATER
Fig. 7 Individual Pump Station designs may vary, but this is a typical example of a two-pump system for use in a Water Loop.

11
SoloChill Micro-Distributed Condensing Unit
5.1 Water Loop Supply and Return
The drawing shown on the previous page depicts the portion of the water loop which accomplishes two critical
functions. It is responsible for: 1) providing the motive force (pumping) to constantly circulate the water/glycol
mixture throughout the loop, and 2) removing/rejecting the heat (via the uid cooler) that is carried by the water/
glycol. Noted by the text in the lower left-hand corner of that drawing are the points where water is returned from the
store and where water (minus the heat it had been carrying) is supplied to the store. In particular, it is supplied to
the network of SoloChill units distributed throughout the interior of the store. As an example of the typical routing of
piping that is utilized within the store, the drawing shown below provides a visual picture of water being supplied to the
condensers (heat exchangers) of two representative SoloChill units. Take particular note of the ball valves installed
where water is supplied to, and returned from, the individual SoloChill units. Within the SoloChill unit, and located on
the copper piping exiting the condenser (heat exchanger) there is a motor-operated modulating valve whose degree-of-
opening is normally controlled by the Heos control board (thus controlling condensation of the refrigerant).
DIFFERENTIAL
PRESSURE TRANSDUCER
BALANCING
VALVE
Condensing
Water Supply
(CWS)
From Fluid Cooler
To Pumping Station
P
Condensing
Water Return
(CWS) RETURN
SUPPLY
SOLOCHILL HEAT LOAD
BALL VALVE WITH STRAINER
BALL VALVE
M
MODULATING VALVE
SOLOCHILL HEAT LOAD
BALL VALVE WITH STRAINER
BALL VALVE
M
MODULATING VALVE
Fig. 8. Water Loop SUPPLY and RETURN to SoloChill Units.

12
SoloChill Micro-Distributed Condensing Unit
5.2 Water Loop Charging Procedure
Prior to any efforts to be in a position to operate the system, the entire water loop system must be satisfactorily
completed and veried to be complete. With the entire system being congured in a loop, any attempts to start up or
test the system will immediately result in extensive, unintended leakage of water/glycol and the need to start again.
When ready, the water loop system may be charged with uid in accordance with the steps listed in the procedure below:
Fluid Loop Charging Procedure
1. Verify that all piping connections in the water loop system are completed satisfactorily.
2. Ensure that all SoloChill units are electrically connected and have power supplied to them.
3. Verify that every SoloChill modulating valve has been CLOSED.
4. OPEN all supply valves and return valves to all SoloChill units.
5. OPEN all loop valves so as to permit uid ow through the entire loop.
6. OPEN all valves to supply uid to the water loop.
a. If a pump skid has been installed, completely ll the pump skid with uid.
(charge uid until the pressure at the pump suction has reached 15 psig)
b. Energize the pump skid
7. Completely ll the uid loop.
8. Run the uid pumps for a duration of 30 minutes to circulate uid through the primary loop.
9. On each SoloChill unit, OPEN the modulating valve for a maximum time period of one (1) minute.
a. Once the one (1) minute time period has ended, CLOSE the modulating valve.
10. Repeat the performance of step 9. at each/every SoloChill unit until all units have been lled with uid and have
been purged of air.
11. If a pump skid is being used, check the uid loop reservoir level, relling it as required.
12. If any of the SoloChill units in the system were not energized for any reason in step 2 above, then a time
period of 24 hours should be allowed to pass before energizing those units.

13
SoloChill Micro-Distributed Condensing Unit
6.0 Electrical Connections
Each “QA” case model (SoloChill condensing unit equipped) provides single-point connections for 4-wire (hot, hot,
neutral, ground) 208V power input from the store, A local power disconnect is provided for the cases. Depending
upon the particular case model this may be a 2-pole circuit breaker or a 208V-compatible switch to interrupt the 2
hot wires feeding the case.
For larger 330/420V units, two (2) breakers may be provided. One breaker interrupts power to the Inverter/
Compressor while the second breaker interrupts power to the case. Consult the appropriate wiring diagram and
associated work order for additional details.
.
Electrical connections for utility or service cases are typically located under the case in a race or a junction box. For
upright multi-deck cases the electrical box with power disconnects is always located at the top left rear of the case.
Please consult Figure B-1 in Appendix B for a detailed drawing which shows electrical connections.
6.1 Importance of Proper Connections
The improper connection of store wires to the case input wires may damage electrical components and controllers.
Thus it is important to be certain the neutrals from separate power panels (208V vs. 120V controller back-up power)
are connected to the correct points on the case. Similarly, check and verify that the hot wires from the 208V panel
are landed to the 208V points of the case, and the hot from the 120V controller back-up panel is properly connected
to the hot-wire designated for 120V controller power.
For upright multi-deck cases, options exist for the installation of a factory-installed raceway located near the top
front portion of the case. If this option is ordered and is present on cases, store power connections may be made
directly within the raceway—six wires extend from the power disconnect breakers/switches through ex conduit and
into the raceway.
For open cases, the raceway will sit forward of the shipping anchor points, and thus may run the entire length of the
case. Covers for the high-voltage raceway and also for the end close-offs are provided as shipped-loose items in the
case.
DANGER!
Electrical shock hazard - more than one disconnect switch may be
required to de-energize the case and condensing unit for servicing..

14 SoloChill Micro-Distributed Condensing Unit
After running wires, these covers must be installed as shown in Fig. 9 (see below). The open trough at the rear of the
raceway may be used for holding the low-voltage controller network cables.
s.
For display cases with doors, the shipping anchor points are located forward of the raceway. As result, a 5 inch
portion at the end of each race-way is absent to allow for the shipping anchors. As shown in Fig. 10, below, two
shipped-loose raceway ends are provided, and these pieces can be installed to provide either a close-off of the
raceway or to allow for pass-thru to the next door case raceway. Covers for the high voltage raceway areas are
provided shipped-loose for installation after wiring has been run in the raceway. In addition, a single L-shaped
bracket is provided shipped-loose per case for continuation of the low-voltage trough from one case raceway to the
adjacent display case with doors in the line-up.
Fig. 9 Location of Optional Raceway with Covers Shipped Loose for Installation.
Fig. 10 Raceway Cover Installation for Door Cases with Raceway Option

15
SoloChill Micro-Distributed Condensing Unit
6.2 Display Cases with Factory Installed SoloChill Units
1. General
a. For most display case applications, the case is supplied with the SoloChill condensing unit that has been
factory-installed with internal piping and wiring connections already completed. Field installed connections
include power, water and Boss network wiring.
b. The typical location for the SoloChill unit is on top of the case in the left hand corner. In some service and
semi-vertical case designs, the SoloChill unit is located in the bottom of the case. Refer to the specic case
model Technical Reference Sheet for specic details.
2. Installation
a. Power
i.
Power to the case is provided with a single-point, 4-wire (hot, hot, neutral, ground) 208V, single phase power input.
ii. Each case may include a switch to disconnect 120V controller power to shut down the SoloChill unit.
iii. Cases utilizing a DA091, DA130, or DA220 SoloChill unit will include a single breaker for overcurrent
protection of the case and SoloChill unit. Cases utilizing a DA330 or DA420 SoloChill unit will have two
breakers for overcurrent protection—one for case power and one for the SoloChill unit.
b. Water - See Section 4.0 for details on the water connections to the SoloChill unit.
c. Network - See Section 7.0 for details on network wiring Connections to SoloChill units.
Fig. 11. Location of the SoloChill condenser on a multi-deck case.

16 SoloChill Micro-Distributed Condensing Unit
6.3 Display Cases with Remote Mounted SoloChill Units
1. General
a. In applications where the SoloChill unit is mounted in a location that is remote from its associated display
case, additional wiring is required between the display case and the SoloChill unit. Of course, it will also be
necessary to run additional refrigeration piping between the two as well. This also means that systems must
be charged and leak checked in the eld.
b. In some instances there will be multiple evaporator coils in the display case lineup with a single SoloChill unit
being used to provide refrigeration for all. In applications such as these, the SoloChill unit controls the
operation of one primary (master) evaporator coil, and the other evaporator coils will each have a separate
controller. Note that each of these separate controllers requires its own, separate power supply.
c. Dual temperature operation is possible in some island case applications. When dual temperature operation
is included, the case section with the primary (master) evaporator must be operated at low temperature only,
but the other sections may be switched to operate at medium temperature conditions.
2. Installation
a. Power
i.
Power to the SoloChill unit is provided with a single-point, 4-wire (hot, hot, neutral, ground) 208V, single phase power input.
ii. Power for fans and heaters (defrost, anti-sweat, drain) for the master evaporator is provided from the
SoloChill unit.
iii. Smaller SoloChill units (DA091, DA130, DA220) will include a single breaker for overcurrent protection of the
case and SoloChill unit. Larger SoloChill units (DA330, DA420) will have two breakers for overcurrent
protection—one for case power and one for the SoloChill unit.
iv. See Figures 12 and 13 on the next page for the general wiring diagrams, and see Appendix B for the more
detailed wiring information (Fig. B-1 for larger units and Fig. B-2 for smaller units).
b. Sensors and EEV - Belden cable should be used for connecting temperature sensors and pressure
transducer in the display case to the SoloChill unit. See Appendix B for wiring details.
c. Water - See Section 4.0 for details on the water connections to the Solochill unit.
d. Network - In multi-evaporator display cases with remote SoloChill units, all controller are connected on the
Boss supervisory Communication Loop. Additionally, the Master and Slave controllers in the SoloChill and
case are connected on a second, pLAN Communication Loop. See Section 7.0 for details on the network
wiring connections to the SoloChill units.

17
SoloChill Micro-Distributed Condensing Unit
Fig. 12 Display Case with Remote SoloChill General Wiring.
Fig. 13 Multi-Evaporator Display Case with Remote SoloChill General Wiring.

18 SoloChill Micro-Distributed Condensing Unit
6.4 Walk-In Applications with Remote Mounted SoloChill
Condensing Units
1. General
a. In walk in cooler and freezer applications, SoloChill units are shipped loose for eld installation. Solochill units
for walk-in applications come with a factory-mounted electrical junction box. This junction box includes a main
breaker as well as power and control connections for the unit cooler fans, defrost, and electronic expansion valve.
b. The maximum distance between the SoloChill unit and the unit cooler should be less than fty (50) feet. The
maximum distance is determined by the EEV cable length of fty (50) feet. Consideration of distance taken
up by cable routing should be included in the maximum distance between the SoloChill unit and the unit
cooler.
c. Unit coolers are to be ordered with Carel temperature sensors, transducer plus cable, and Carel E2V electronic
expansion valve plus cable—all factory installed, but terminated in the eld.
2. Installation
a. In typical installations, the SoloChill unit is installed directly onto a solid, at structure (a walk-in roof), or
possibly suspended from the building ceiling on unistrut secured by a threaded rod. (see example installation Fig. 14)
3. Piping
a. Refrigeration - always follow standard refrigeration piping practices when connecting the condensing
unit to the unit cooler.
b. Water - see section 4.0. Note that the tting sizes for water connections are specied as 3/4 inch MPT.
4. Wiring
a. Sensor and EEV Wiring
i. The unit cooler is ordered with the following items as factory-installed.
1. Carel E2V electronic expansion valve
2. Carel Stator/Cable plus extension kit (Carel #E2VSTA03A1)
3. Carel suction pressure transducer (0-250 psi)
4. Carel Transducer cable
5. Transducer shut off valve
6. Temperature sensors
a. Discharge/Air Off
b. Return/Air On
c. Defrost Termination
d. Suction

19
SoloChill Micro-Distributed Condensing Unit
ii. The temperature sensors and transducer will typically be wired to terminal pins in the unit cooler panel.
Belden 9409 cable (or equivalent) should be used to connect temperature sensors between the terminal
pins in the unit cooler and the HEOS control board in the SoloChill unit (refer to Appendix B, Figure B-2 and
Figure B-3 for details). The transducer connection should be made with Belden 8760 cable (or equivalent).
iii. EEV Cable - The EEV cable requires a connector on one end that will connect directly to the HEOS board in the
SoloChill unit. This connector is approximately ¾ inch X ¼ inch in cross section. Please refer to Appendix B,
Figure B-4, Figure B-5, and Figure B-6 for details)
1. Standard cable - unit coolers are supplied with a Stator/Cable set plus 6 meter (approximately
twenty, 20, feet) If the SoloChill unit is located more than twenty (20) feet away from the unit cooler,
longer extensions (available from Hillphoenix) should be obtained (see below).
2. Extension cables available
a. 30 ft extension cable - HP #106934
b. 40 ft extension cable - HP #106938
c. 50 ft extension cable - HP #106939
b. SoloChill Unit Power Wiring - refer to Appendix B Figure B-7 for detailed information
Fig. 14 Alternate SoloChill Unit Mounting Method for Walk-In Coolers/Freezers

20 SoloChill Micro-Distributed Condensing Unit
6.5 Walk-In Applications with Remote, Non-SoloChill, Water-
Cooled Condensing Units
1. General
a. In instances where there is not a suitable SoloChill unit to meet capacity requirements for a particular
walk-in application, Hillphoenix will provide a non-SoloChill, water-cooled condensing unit.
b. In applications such as these, the unit cooler is still provided with the same sensors and expansion valve as
with the SoloChill condensing unit application. However, the Carel HEOS controller and the corresponding
power and controls are provided in a control panel (HEOS Panel) with a properly sized disconnect switch
rather than being included with a SoloChill unit. The Heos panel will include fan and defrost contactors and
breakers for walk-ins with electric defrost, and equipped with fan contactors and breakers only if the walk-in
is designed for off-time defrost.
c. The condensing unit is powered separately and operates independently off of the low pressure switch control.
d. All applications such as these must adhere to the same maximum distance limits between the unit cooler and
the HEOS panel as with SoloChill applications (based on maximum EEV cable length).
2. Installation
a. HEOS Panels - The panel may be installed on the roof of the walk-in cooler/freezer near the location of the unit
cooler or may be suspended from the ceiling using uni-strut and secured by threaded rods, in a manner
similar to the SoloChill Unit mounting.
b. Non-SoloChill Condensing Units - the manufacturer’s recommended installation instructions should be followed
but, in general, installation methods similar to those used with SoloChill installations may be followed.
3. Piping
a. Refrigeration - always follow standard refrigeration piping practices when connecting the condensing
unit to the unit cooler. The system must be charged and leak-checked in the eld.
b. Water - see section 4.0. Note that the tting sizes for water connections on non-SoloChill condensing units
may vary from those used on SoloChill units. Refer to the individual manufacturer’s documentation to verify
the proper tting sizes for water connections.
4. Wiring
a. Methods - the same wiring methods as specied in the previous section “Walk-Ins with Remote Mount
SoloChill Condensing Units” are to be used with non-SoloChill condensing unit applications, with the
exception that third-party condensing unit will typically be powered separately from the HEOS panel.