Johnson Controls JMW Series Owner's manual

Water Source Heat Pumps
Installation, Operation, Maintenance Supersedes:14806-NOM1-1221 Form: 14806-NOM1-0223
97B0059N07
Issue Date: February 28, 2023
JMW-Series
Water Source Heat Pump
MODELS JMW
3-28 Tons

WATER-SOURCE HEAT PUMPS
JMW-Series
Rev.: February 28, 2023
Installation, Operation, Maintenance
2
Table of Contents
Model Nomenclature 3
General Information 4-5
Unit Physical Data 6
JMW036-120 – Unit Dimensional Data 7
JMW170 & 340 – Unit Dimensional Data 8
Unit Installation 9
Piping Installation 9-10
Load Plumbing Installation 10
Water-Loop Heat Pump Applications 11
Ground-Water Heat Pump Applications 12-13
Ground-Loop Heat Pump Applications 14-15
Water Quality Standards 16-19
Electrical – Line Voltage 20
Electrical – Accessories 21
Electrical – Line Voltage 22
Electrical – Low Voltage 23
Wiring Diagram Matrix 24
Controls - CXM2 and DMX2.5 25
Unit & System Checkout 26
Unit Start Up Procedure 27
Operating Pressures 28-29
Preventative Maintenance 30
Start-Up Log Sheet 31
Refrigeration Troubleshooting Form 32
Revision History 36

JMW-Series
Rev.: February 28, 2023
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Installation, Operation, Maintenance 3
Model Nomenclature
J M W A0 3 6 CG 1 0 C 0 C S
1 2 3 4 5 6 7
8
9 10 11 12 13 14 15
JM = JOHNSON CONTROLS
Water to Water
MODELTYPE
W = WATER TO WATER HEAT PUMP
CONFIGURATION
UNIT SIZE
036 - E,F,G,H
REVISION LEVEL
A= CURRENT 036
B = CURRENT 060, 120, 170, 340
VOLTAGE
CONTROLS
CABINET INSULATION
1 = EXTENDED RANGE
HOT WATER GENERATOR OPTIONS
(JMW036-120 ONLY)
C = COPPER
SOURCE WATER COILOPTIONS
N = CUPRO-NICKEL
C = COPPER
LOAD WATER COILOPTIONS
N = CUPRO-NICKEL
S = STANDARD
0 = NONE
RESERVED-FOR FUTURE OPTIONS
0 = NONE
060 - F,G,H,N
120 - F,G,H,N
170 - F,H,N
340 - F,H,N
2 = EXTENDED RANGE w/Sound Attenuation Package
2 = HWG (COILONLY)
G = 208-230/60/1
E = 265/60/1
H = 208-230/60/3
F = 460/60/3
N = 575/60/3
AVAILABLE
VOLTAGES
{
Control
CXM2
DXM2.5
CXM2 w/ MPC
DXM2.5 w/ MPC
C
D
N
P
A
B
R
S
w/oDisconnect w/Disconnect

WATER-SOURCE HEAT PUMPS
JMW-Series
Rev.: February 28, 2023
Installation, Operation, Maintenance
4
General Information
WARNING! 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 prociency requirements.
CAUTION! To avoid equipment damage, DO NOT use
these units as a source of heating or cooling during the
construction process. The mechanical components and lters
can quickly become clogged with construction dirt and debris,
which may cause system damage and void product warranty.
⚠ WARNING! ⚠
⚠ WARNING! ⚠
⚠ CAUTION! ⚠
Safety
Warnings, cautions, and notices appear throughout this
manual. Read these items carefully before attempting any
installation, service, or troubleshooting of the equipment.
DANGER: Indicates an immediate hazardous situation,
which if not avoided will result in death or serious injury.
DANGER labels on unit access panels must be observed.
WARNING: Indicates a potentially hazardous situation,
which if not avoided could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation or
an unsafe practice, which if not avoided could result in
minor or moderate injury or product or property damage.
NOTICE: Notication of installation, operation, or
maintenance information, which is important, but which is
not hazard-related.
WARNING! 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.
⚠ WARNING! ⚠
WARNING! The installation of water-source heat pumps and
all associated components, parts, and accessories which
make up the installation shall be in accordance with the
regulations of ALL authorities having jurisdiction and MUST
conform to all applicable codes. It is the responsibility of
the installing contractor to determine and comply with ALL
applicable codes and regulations.
WARNING! This product can expose you to chemicals
including formaldehyde, which is known to the state of
California to cause cancer. For more information, go to
www.P65Warnings.ca.gov.
⚠ WARNING! ⚠

JMW-Series
Rev.: February 28, 2023
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Installation, Operation, Maintenance 5
General Information, Cont’d.
Inspection - Upon receipt of the equipment, carefully
check the shipment against the bill of lading. Make sure
all units have been received. Inspect the carton or crating
of each unit, and inspect each unit for damage. Assure
the carrier makes proper notation of any shortages or
damage on all copies of the freight bill and completes a
common carrier inspection report. Concealed damage
not discovered during unloading must be reported to
the carrier within 15 days of receipt of shipment. If not
led within 15 days, the freight company can deny the
claim without recourse. Note: It is the responsibility of
the purchaser to le all necessary claims with the carrier.
Notify the Johnson Controls Customer Service of all
damage within fteen (15) days of shipment.
Storage - Equipment should be stored in its original
packaging in a clean, dry area. Store units in an upright
position at all times. Do not stack JMW170 or 340. The
stack limit for JMW036, 060 and 120 is three.
Unit Protection - Cover units on the job site with
either shipping packaging, vinyl lm, or an equivalent
protective covering. Cap the open ends of pipes stored
on the job site. In areas where painting, plastering, and/
or spraying has not been completed, all due precautions
must be taken to avoid physical damage to the units and
contamination by foreign material. Physical damage and
contamination may prevent proper start-up and may
result in costly equipment clean-up.
Examine all pipes, ttings, and valves before installing
any of the system components. Remove any dirt or trash
found in or on these components.
Pre-Installation - Installation, Operation, and
Maintenance instructions are provided with each unit..
The installation site chosen should include adequate
service clearance around the unit. Before unit start-up,
read all manuals and become familiar with the unit and its
operation. Thoroughly check the system before operation.
Prepare units for installation as follows:
1. Compare the electrical data on the unit nameplate
Twith ordering and shipping information to verify that
the correct unit has been shipped.
2. Keep the cabinet covered with the shipping packaging
until installation is complete and all plastering, painting,
etc. is nished.
3. Verify refrigerant tubing is free of kinks or dents and
that it does not touch other unit components.
4. Inspect all electrical connections. Connections must be
clean and tight at the terminals.
CAUTION! All three phase scroll compressors must have
direction of rotation veried at start-up. Verication is
achieved by checking compressor Amp draw. Amp draw
will be substantially lower compared to nameplate values.
Additionally, reverse rotation results in an elevated sound
level compared to correct rotation. Reverse rotation will result
in compressor internal overload trip within several minutes.
Verify compressor type before proceeding.
CAUTION! DO NOT store or install units in corrosive
environments or in locations subject to temperature or
humidity extremes (e.g., attics, garages, rooftops, etc.).
Corrosive conditions and high temperature or humidity can
signicantly reduce performance, reliability, and service life.
Always move and store units in an upright position. Tilting
units on their sides will cause equipment damage.
⚠ CAUTION! ⚠
⚠ CAUTION! ⚠
⚠ CAUTION! ⚠
CAUTION! CUT HAZARD - Failure to follow this caution may
result in personal injury. Sheet metal parts may have sharp
edges or burrs. Use care and wear appropriate protective
clothing, safety glasses and gloves when handling parts and
servicing heat pumps.

WATER-SOURCE HEAT PUMPS
JMW-Series
Rev.: February 28, 2023
Installation, Operation, Maintenance
6
Unit Physical Data
Unit Maximum Water Working Pressure
Options Max Working Pressure PSIG [kPa]
Base Unit 300 [2,068]
Motorized Valves 400 [2,758]
Dual isolated compressor mounting
Balanced port expansion valve (TXV)
Insulated Source and Load Water Coils standard
Insulated Refrigerant Circuit standard
Compressor on (green) and fault (red) light
Model JMW036 JMW060 JMW120 JMW170 JMW340
Compressor (qty) Scroll (1) Scroll (2) Scroll (1) Scroll (2)
Factory Charge R410A (lbs) [kg] / Circuit 4.5 [2.04] 5.5 [2.49] 5.5 [2.49] 14.9 [6.75] 14.9 [6.75]
Indoor / Load Water connection sizes FPT (in) 3/4” 1” 1-1/2” 2”
Outdoor / Source Water connection Size FPT (in) 3/4” 1” 1-1/2” 2”
HWG Water In/Out IPT (in) 1/2” N/A
Weight - Operating (lbs) [kg] 348 [158] 360 [163] 726 [329] 790 [358] 1330 [603]
Weight - Shipping (lbs) [kg] 373 [169] 385 [175] 770 [349] 800 [363] 1340 [608]
Water Volume (Source)
Gallons (LIters) 0.96 (3.64) 1.33 (5.04) 2.65 (10.02) 3.50 (13.27) 6.72 (25.44)
Dual isolated compressor mounting
Balanced port expansion valve (TXV)
Compressor on (green) and fault (red) light

JMW-Series
Rev.: February 28, 2023
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Installation, Operation, Maintenance 7
JMW036-120 – Unit Dimensional Data
Water to
Water
Overall Cabinet
Water Connections
Electric Access Plugs
1 2 3 4 5 6
A
Depth
B
Width
C
Height
D
Source
(Outdoor)
Water In
E
Source
(Outdoor)
Water Out
F
Load
(Indoor)
Water In
G
Load
(Indoor)
Water Out
H
HWG
Water In
J
HWG
Water
Out
K
Low
Voltage
L
External
Pump
M
Power
Supply
036-060 in. 30.6 25.4 33 2.7 9.4 19.4 24.5 27.9 30.4 20.9 22.9 30.9
cm. 77.8 64.5 83.8 6.9 23.9 49.3 62.2 70.9 77.2 53.1 58.2 78.5
120 in. 30.6 52.9 37 25.2 25.2 30.1 30.1 34.9 34.9 29.9 31.9 34.4
cm. 77.8 134.4 94 64.0 64.0 76.5 76.5 88.6 88.6 75.9 81.0 87.4
B
C
A
M
L
K
1.0
(2.5 cm)
1
2
3
4
56
J
H
G
F
E
D
1
2
3
4
5
6
Required
Service Access
Optional
Service Access
Required
Service Access
Optional
Service Access
B
C
A
1.8
(4.6 cm)
1.3
(3.3 cm)
2.7
(6.9 cm)
(18.3 cm)
(4.3 cm)
1.0
(2.5 cm)
7.2
1.7
3 Ft
3 Ft
Notes 1 & 2
3 Ft
Notes 1 & 2
Notes 1 & 2
3 Ft
Notes 1 & 2
(7.4 cm)
2.9
(10.1 cm)
4.0
JMW
036-060
JMW 120
K
L
M
B
C
A
M
L
K
1.0
(2.5 cm)
1
2
3
4
56
J
H
G
F
E
D
1
2
3
4
5
6
Required
Service Access
Optional
Service Access
Required
Service Access
Optional
Service Access
B
C
A
1.8
(4.6 cm)
1.3
(3.3 cm)
2.7
(6.9 cm)
(18.3 cm)
(4.3 cm)
1.0
(2.5 cm)
7.2
1.7
3 Ft
3 Ft
Notes 1 & 2
3 Ft
Notes 1 & 2
Notes 1 & 2
3 Ft
Notes 1 & 2
(7.4 cm)
2.9
(10.1 cm)
4.0
JMW
036-060
JMW 120
K
L
M
Notes:
1. Front & side access is preferred for service access.
However, all components may be serviced from
the front access panel if side access is not avail-
able.
2. While clear access to all removable panels is not
required, installer should take care to comply with
all building codes and allow adequate clearance for
future field services.

WATER-SOURCE HEAT PUMPS
JMW-Series
Rev.: February 28, 2023
Installation, Operation, Maintenance
8
JMW170 & 340 – Unit Dimensional Data
12.3
[313]
15.0
[381]
4.5
[114]
4.3
[108]
Power Supply Wiring
1.375 x 2.0
[ 34.9 x 50.8] Double KO
4.3
[108]
Control Wiring
1.125 x 1.375
[ 28.6 x 34.9] Double KO
4.5
[114]
2” IPT Water Connections
15.0
[381]
5.4
[138]
21.0
[533]
Fault/Run Lights
64.5
[1638]
Left
Side
View
Front
View
Top
View
Load Source
Side
Refrig.
Circuit
Access
Panel
Front
Compressor
Access
Panel
Electrical
Access
Panel
Header
Access
Panel
Top
Notes: 1. Dimensions shown in inches and [millimeters].
2. For multiple units placed side by side, allow
sufficient space front or back to remove unit.
Minimum
3ft. [91cm]
Required Service
Access
NOTE 2
45.1
[1146]
26.3
[669]
Optional (Single Unit)
3ft. (91cm) Additional
Service Access

JMW-Series
Rev.: February 28, 2023
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Installation, Operation, Maintenance 9
Unit Installation
Installation of Supply and Return Piping
Follow these piping guidelines.
1. Install a drain valve at the base of each supply and
return riser to facilitate system ushing.
2. Install shut-off / balancing valves and unions at each
unit to permit unit removal for servicing.
3. Place strainers at the inlet of each system
circulating pump.
4. Select the proper hose length to allow slack between
connection points. Hoses may vary in length by +2%
to -4% under pressure.
5. Exceeding the minimum bend radius may cause the
hose to collapse which reduces water ow rate. Install
an angle adapter to avoid sharp bends in the hose
when the radius falls below the required minimum
and causes a slight kink.
Insulation is not required on loop water piping except
where the piping runs through unheated areas or outside
the building or when the loop water temperature is
below the minimum expected dew point of the pipe
ambient temperature. Insulation is required if loop water
temperature drops below the dew point.
Pipe joint compound is not necessary when Teon
threaded tape is pre-applied to hose assemblies or when
ared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on the
pipe threads of the tting adapters. Prevent sealant from
reaching the ared surfaces of the joint.
PIPING INSTALLATION
JMW Unit Location - These units are not designed for
outdoor installation. Locate the unit in an INDOOR area
that allows enough space for service personnel to perform
typical maintenance or repairs.
The installation of water source heat pump units and all
associated components, parts and accessories which
make up the installation shall be in accordance with
the regulations of ALL authorities having jurisdiction
and MUST conform to all applicable codes. It is the
responsibility of the Installing Contractor to determine
and comply with ALL applicable codes and regulations.
Locate the unit in an indoor area that allows easy removal
of access panels, and has enough space for service
personnel to perform maintenance or repair. Provide
sufcient room to make water and electrical connections..
Any access panel screws that would be difcult to remove
after the unit is installed should be removed prior to
setting the unit. These units are not approved for outdoor
installation and, therefore, must be installed inside the
structure being conditioned. Do not locate in areas where
ambient conditions are not maintained within 40-100°F
[4-38°C].
⚠ WARNING! ⚠
WARNING! Piping must comply with all applicable codes.
⚠ WARNING! ⚠
WARNING! Do not bend or kink supply lines or hoses.
Note: When anti-freeze is used in the loop, assure
that it is compatible with Teon tape or pipe joint
compound employed.
Maximum allowable torque for brass ttings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
nger-tight plus one quarter turn. Tighten steel ttings
as necessary.

WATER-SOURCE HEAT PUMPS
JMW-Series
Rev.: February 28, 2023
Installation, Operation, Maintenance
10
Piping Installation
JMW Unit Load Plumbing - The applications are too
varied to describe in this document. However, some basic
guidelines will be presented. Much of the discussions
on water loop applications would be valid for the load
plumbing discussion as well. All plumbing should conform
to local codes with the following considerations:
Wide temperature variation applications such as
heating/cooling coils:
- Employ piping materials that are rated for the
maximum temperature and pressure combination.
This excludes PVC for most heating applications.
- Insure that load water ow in high temperature
heating applications is at least 3 gpm per ton [3.9 l/m
per kW] to improve performance and reduce nuisance
high pressure faults.
- DO NOT employ plastic to metal threaded joints
- Utilize a pressure tank and air separator vent system to
equalize pressure and remove air.
Swimming Pool Hot Tub Applications:
- Load coax should be isolated with secondary heat
exchanger constructed of anti-corrosion material in all
chlorine/bromine uid applications.
Potable Water Applications:
- Potable water systems require eld supplied external
secondary heat exchanger.
- Insure load water ow in high temperature heating
applications is at least 3 gpm per ton to improve
performance & reduce nuissance to high pressure faults.
LOAD PLUMBING INSTALLATION
Optional pressure-rated hose assemblies designed
specically for use with Johnson Controls units are available.
Similar hoses can be obtained from alternate suppliers.
Supply and return hoses are tted with swivel-joint ttings
at one end to prevent kinking during installation.
Refer to Figure 1 for an illustration of a Supply/Return
Hose Kit. Male adapters secure hose assemblies to the
unit and risers. Install hose assemblies properly and
check them regularly to avoid system failure and reduced
service life.
⚠ CAUTION! ⚠
CAUTION! Corrosive system water requires corrosion
resistant ttings and hoses and possibly water treatment.
Figure 2: Typical Water Loop Application
Load Connections
(Hot Water/Chilled Water)
Source Connections
(Boiler/Tower,
Geothermal Loop)
Power Disconnect
Figure 1: Supply/Return Hose Kit
Rib Crimped
Length
(2 ft [0.6m] Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
MPT
Reborde Acanalado
Longitud
(Long. Estándar de 2 pies)
Accesorio
Giratorio
de Bronce
Accesorio
de Bronce
MPT
MPT
MPT
Rib Crimped
Length
(0.6m Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
MPT
MPT
Note: The manufacturer strongly recommends all piping
connections, both internal and external to the unit, be
pressure tested by an appropriate method prior to any
nishing of the interior space or before access to all
connections is limited. Test pressure may not exceed the
maximum allowable pressure for the unit and all components
within the water system. The manufacturer will not be
responsible or liable for damages from water leaks due to
inadequate or lack of a pressurized leak test, or damages
caused by exceeding the maximum pressure rating during
installation.
WARNING! Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
⚠ WARNING! ⚠