Johnson Controls YVAM 350 Quick start guide
Field Connections Diagram for Model YVAM
Chiller with M2 Compressor
Wiring diagram
Contractor:
Order number:
Johnson Controls contract number:
Johnson Controls order number:
Purchaser:
Job name:
Location:
Engineer:
Reference Date:
Approval Date:
Construction Date:
Job data
Chiller model number YVAM: _____________________________________________________________
Number of units: ______________________
Motor/Variable speed drive power: 460 V, 60 Hz
Form Number: 160.88-PW1 (1122)
Supersedes: 160.88-PW1 (722)
Issue Date: 2022-11-30
General safety guidelines
Important: Read before proceeding.
This equipment is a relatively complicated apparatus. During rigging, installation, operation,
maintenance, or service, individuals may be exposed to certain components or conditions including,
but not limited to: heavy objects, refrigerants, materials under pressure, rotating components, and
both high and low voltage. Each of these items has the potential, if misused or handled improperly,
to cause bodily injury or death. It is the obligation and responsibility of rigging, installation,
and operating or service personnel to identify and recognize these inherent hazards, protect
themselves, and proceed safely in completing their tasks. Failure to comply with any of these
requirements could result in serious damage to the equipment and the property in which it is
situated, as well as severe personal injury or death to themselves and people at the site.
This document is intended for use by owner-authorized rigging, installation, and operating
or service personnel. It is expected that these individuals possess independent training that
will enable them to perform their assigned tasks properly and safely. It is essential that, prior
to performing any task on this equipment, this individual shall have read and understood the
on-product labels, this document and any referenced materials. This individual shall also be
familiar with and comply with all applicable industry and governmental standards and regulations
pertaining to the task in question.
Important: Intended installation for this equipment should not be accessible to general
public. All locations must have controlled access so that no unauthorized persons can access
the equipment.
Safety symbols
The following symbols are used in this document to alert the reader to specific situations:
DANGER
Indicates a possible hazardous situation which will result in death or serious injury if proper care is not
taken.
WARNING
Indicates a potentially hazardous situation which will result in possible injuries or damage to equipment
if proper care is not taken.
CAUTION
Identifies a hazard which could lead to damage to the machine, damage to other equipment and/or
environmental pollution if proper care is not taken or instructions and are not followed.
Note: Highlights additional information useful to the technician in completing the work being
performed properly.
Field Connections Diagram for Model YVAM Chiller with M2 Compressor2
Wiring warning
WARNING
External wiring, unless specified as an optional connection in the manufacturer’s product line, is not
to be connected inside the control cabinet. Devices such as relays, switches, transducers and controls
and any external wiring must not be installed inside the micro panel. All wiring must be in accordance
with Johnson Controls’ published specifications and must be performed only by a qualified electrician.
Johnson Controls will not be responsible for damage/problems resulting from improper connections
to the controls or application of improper control signals. Failure to follow this warning will void the
manufacturer’s warranty and cause serious damage to property or personal injury.
Changeability of this document
In complying with Johnson Controls policy for continuous product improvement, the information
contained in this document is subject to change without notice. Johnson Controls makes no
commitment to update or provide current information automatically to the manual or product
owner. Updated manuals, if applicable, can be obtained by contacting the nearest Johnson
Controls Service office or accessing the Johnson Controls Knowledge Exchange website at https://
docs.johnsoncontrols.com/chillers/.
It is the responsibility of rigging, lifting, and operating/service personnel to verify the applicability
of these documents to the equipment. If there is any question regarding the applicability of these
documents, rigging, lifting, and operating/service personnel should verify whether the equipment
has been modified and if current literature is available from the owner of the equipment prior to
performing any work on the chiller.
Revision notes
Revisions made to this document are indicated in the following table. These revisions are to
technical information, and any other changes in spelling, grammar, or formatting are not included.
Table 1: Revision notes
Affected pages Description
6 Updated wire range in lug details table
Associated literature
Table 2: Associated literature
Manual description Form number
YVAM Installation and Reassembly 160.88-N1
YVAM Unit Operations and Maintenance Manual 160.88-OM1
3Field Connections Diagram for Model YVAM Chiller with M2 Compressor
YVAM 350
Notes
1. All field wiring must be completed in accordance with the National Electrical Code (NEC) or
with any other electrical codes that may apply to where the chiller is installed. NEC articles
and paragraphs cited are for reference only and may not be current NEC code.
2. Ground wiring is as follows:
WARNING
Proper grounding is required.
- The auxiliary panel must be grounded in accordance with the 2020 NEC, Paragraph
250.118.
- Ground wires must be copper only and sized in accordance with the NEC and with the
lug size range defined in Table . See Table 250.122 of the NEC.
CAUTION
The use of conductors larger than those defined in Table violates NEC wire bend space
requirements and delays the start-up of the chiller.
- A separate grounding conductor must be run in each conduit or for each three-phase
bundle within a cable tray. See Figure .
- Each ground wire must be connected directly between the supply transformer’s
secondary ground and the auxiliary panel ground lug.
- Conduit is not an acceptable means for grounding.
- See Table for auxiliary panel ground lug sizing.
3. Johnson Controls does not provide wiring, electrical conduit, junction boxes, fused disconnect
switches (FDS) or circuit breakers, starters (M), pushbutton stations (PB), manual-off-
automatic switch (S), flow switch (FLS), and control relays, unless otherwise specified.
4. Items marked * are provided by Johnson Controls.
5. Items marked ** are available from Johnson Controls at an additional cost.
6. Control power supply 115 V - 50 Hz/60 Hz, 3.0 KVA capacity for control center only, is supplied
by (1)-3.0 KVA control power transformer (1T) mounted inside the auxiliary panel. It is factory
wired.
7. A removable conduit plate is located on the side of the auxiliary panel enclosure. Use
the conduit plate for the installation of input power conduits. The conduit plate provides
knockouts to allow the use of a conduit cutter. The conduit plate must be removed before the
conduit openings are cut. Cut input power and ground wires to length outside of the auxiliary
panel enclosure. Use a tool that is designed to cut large diameter wire that will not cause
copper debris to be present inside the enclosure. Do not use a grinder or saw, including the
Sawzall® saw, to cut the conduit holes or the wires to length.
Field Connections Diagram for Model YVAM Chiller with M2 Compressor4
Figure shows the location of the removable conduit plate. Do not penetrate the auxiliary
panel, except to the conduit plate when it is removed from the auxiliary panel enclosure. No
other customer connections are provided in the auxiliary panel enclosure.
DANGER
Failure to correctly make conduit openings, cut power wire, or any method of making additional
holes in the enclosure may result in an arc flash event, damage to equipment, injury of
personnel, and replacement of equipment outside of factory warranty.
CAUTION
Failure to install the input power conduits through the conduit plate on the side of the enclosure
violates the 2020 NEC, Paragraph 312.6(B2) and Table 312.6(B), wire bend space requirements.
CAUTION
Multiple conduits must contain an equal number of wires from each phase in each conduit to
prevent overheating within the conduit in accordance with 2020 NEC, Paragraph 300-20(a). Use
copper conductors only. Do not use aluminum conductors. The use of aluminum wire may delay
the start-up of the chiller.
Figure 1: Auxiliary panel grounding 350
Note:
- Each conduit must contain a copper conductor of each phase and a copper
ground wire.
- The wire tray must contain bundles of copper wire with one conductor for reach
phase and a copper ground wire in each bundle.
5Field Connections Diagram for Model YVAM Chiller with M2 Compressor
Table 3: Lug details
Option Input voltage Frequency Line side lugs
BBL per phase Wire range
Grounding lug
wire range,
quantity
Circuit breaker 460 V 60 Hz 3 4/0 - 500 MCM #6-350, 3 bbl
8. Input power wiring conductors must have a current rating equal to or greater than the
minimum circuit ampacity for the chiller rating. See Note 12. The diameter of the wire is
determined by NEC, and the lug wire range of the circuit breaker is as noted in Table .
9. The OptiView™ Control Center has automatic control of the chilled water pump. The chilled
water pump motor starter (5M) holding coil is supplied for 115 V, 50 Hz or 60 Hz. The power
requirements for the water pump starter (5M) must be a maximum of 2 A holding and 10 A
inrush. If power requirements exceed this value, furnish the coil for line voltage, and control
relay with 115 V coil. See Note 17.
- The pump operates during chiller start up, chiller operation, shutdowns, and when in
freeze protection mode.
- For manual chilled water pump control, in applications where ambient conditions
can lead to below-freezing temperatures, do not use the manual chilled liquid pump
operation unless there is sufficient logic to operate the pump when the ambient
temperature is ≤ 36°F (2.2°C). If manual pump control can be guaranteed at operation
at ≤ 36°F (2.2°C), then connect a manual start/stop switch as shown in Form 160.88-
PW2 Field Connections Diagram for the 115 VAC coils only.
Table 4: Conduit details
Input voltage Frequency Chiller motor code Maximum number of
conduits
460 V, 60 Hz 60 Hz M2 3 (3 in.)
10. Wire #14 AWG copper for one-way distance of less than 175 ft (53.34 m). Wire #12 AWG
copper for one-way distance of more than 175 ft (53.34 m), but less than 300 ft (91.44 m).
11. Refer to the wiring diagram for YORK Control Center and Field Control Modifications, Form
160.88-PW2.
12. The branch circuit overcurrent protection device for the YVAM chiller must be a time delay
type. It must have a rating that is the standard fuse or circuit breaker size that is required to
protect the field supply wiring conductors, as outlined by the NEC.
13. The YVAM input power supply wiring ampacity is calculated using the UL60335-2-40,
101.DVB.2.1
14. The YVAM chiller is equipped with a UL-listed circuit breaker. Fast-acting semiconductor fuses,
down-stream of the circuit breaker, provide additional protection to the chiller. Ground fault
is employed on the circuit breaker and the drive controls.
15. The minimum value of line impedance is determined by the chiller's power when it is
provided from a transformer with a kVA rating equal to five times the rated power of the
chiller. The transformer is specified to have 3% impedance. The supply voltage requirements
at the auxiliary panel input terminals are defined in the following table.
Table 5: Voltage ranges
Input voltage Frequency Voltage range Minimum applied voltage at
start-up
460 V Hz 60Hz 414 V to 508 V 391 V
Field Connections Diagram for Model YVAM Chiller with M2 Compressor6
16. The maximum line voltage imbalance is 5%. The voltage imbalance is calculated as the
difference between any of the three line voltages and the average of the three line voltages,
and multiplied by 100%. The maximum line voltage total harmonic distortion (THD) is 5% for
each phase, from n=2nd to n=50th harmonic, when line impedance is specified as follows:
- The minimum value of line impedance is determined by the case where the chiller's
power is provided from a transformer with a kVA rating equal to five times the rated
power of the chiller. The transformer is specified to have 3% impedance.
- The maximum value of line impedance is determined by the case where the chiller's
power is provided from a transformer with a kVA rating equal to the rated power of
the chiller. The transformer is specified to have 7% impedance.
17. Each 115 VAC field-connected inductive load, for example relay coil and motor starter coil,
must have a transient suppressor wired by others in parallel with its coil, physically located
at the coil. Spare transient suppressors are factory supplied in a bag attached to the keypad
cable clamp in the OptiView™ Control Center.
18. All switches and circuit breakers used as switches are located so that they can be operated
from a readily accessible place. They are installed in accordance with 2020 NEC, Paragraph
404.8. Switches and circuit breakers installed adjacent (close-coupled) to motors, appliances,
or other equipment that they supply can be located higher than 6 ft 7 in. (2 m) and can be
accessed by portable means as outlined in 2020 NEC, Paragraph 404.8 Exception No. 2.
19. Displacement power-factor correction capacitors: The drive provides automatic displacement
power factor correction to a minimum of 0.97 at all operating conditions.
Note: The use of power factor correction capacitors can overcorrect the power factor
and cause faulty operation or failure of the drive. A failure due to the use of power factor
correction capacitors is not covered under warranty.
20. The use of an automatic transfer switch requires a delay of 10 s between the transfer from
utility-to-generator and generator-to-utility.
Note: Failure to provide this delay can damage the drive. Repairs due to this issue are
not covered under warranty.
Table 6: Auxiliary panel ratings
Auxiliary panel circuit breaker
rating at 480 VAC, 60 Hz
Input voltage Frequency Chiller motor
code Trip Withstand
Semiconductor
fuse rating (A)
at 660 VAC
Ground fault
trip
460 VAC 60 Hz M2 800 A 100 kAIC n/a 160 A
Note:
• UL listed
• RMS symmetrical amperes
7Field Connections Diagram for Model YVAM Chiller with M2 Compressor
WARNING
Removable conduit plate where power conduit must be installed.
The plate must be removed before cutting conduit holes. Failure to remove the plate when cutting the
conduit holes requires replacement of the auxiliary panel at a cost outside of warranty.
Figure 2: Auxiliary panel layout with conduit plate 350, left view, in. (mm)
Callout Description
A Conduit plate
Field Connections Diagram for Model YVAM Chiller with M2 Compressor8
Field connections
Figure 3: Field connections, single point wiring
Note: The dashed line represents customer wiring.
9Field Connections Diagram for Model YVAM Chiller with M2 Compressor
Figure 4: Field connections, waterbox heater kit
Note:
1. The dashed line represents customer wiring.
2. The minimum circuit ampacity is 15 A, recommend #14 AWG, 75°C, CU, or equivalent.
© 2022 Johnson Controls. 5000 Renaissance Drive, New Freedom, York, PA 17349, USA. Subject to
change without notice. All rights reserved.
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