FMS-1655M
Room Pressure Monitor
Installation Instructions
LB-FMS1655M-S01
LB-FMS1655M-T01
LIT-12013119
January 2019
Application
These installation instructions guide the installer through the installation of the FMS-1655M Room Pressure Monitor.
Please read these instructions thoroughly before beginning installation.
North American Emissions Compliance
United States
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area may cause harmful interference, in which case users will be required to correct the interference at their own expense.
Canada
This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
Installation
NOTICE
Risk of Property Damage.
Ensure that the power source conforms to the requirements of the equipment. Failure to use a correct power source may result in
permanent damage to the equipment.
NOTICE
Risque de dégâts matériels.
S’assurer que la source d’alimentation électrique est conforme aux spécications de l’équipement. L’utilisation d’une source
d’alimentation électrique inappropriée risque d’endommager irrémédiablement l’équipement.
IMPORTANT: The FMS-1655M Room Pressure Monitor must be wired to 24 VAC only. Wiring the unit to 110 VAC will cause
serious damange and void the warranty.
Use of the software that is in (or constitutes) this product or access to the cloud or hosted services applicable to this product, if any,
is subject to applicable terms set forth at www.johnsoncontrols.com/techterms. Your use of this product constitutes an agreement to
such terms. If you do not agree to be bound by such terms, you may return the unused product to your place of purchase.
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FMS-1655M
FMS-1655M Room Pressure Monitor settings
This form should be completed during the initial conguration for each room pressure monitor. Be sure to congure
the unit for either Positive, Negative, or both using the Isolation Mode Conguration setup procedure.
Room Name / Number
Unit Model Number and Serial Number (ESN)
Analog Output
Operating Mode (Direct or PID)
Analog Output Range (zero based or offset)
Analog Output Upper Limit (0-100%)
Analog Output Lower Limit (0-100%)
Analog Output Action (Direct or Reverse)
PID Constants
Proportional Constant (0.5-100%)
Integral Constant (0.0-100%)
Derivative Constant (0.0-100%)
Alarm Limits
Positive Isolation High Alarm Setpoint
Positive Isolation High Warning Setpoint
Positive Isolation Low Warning Setpoint
Positive Isolation Low Alarm Setpoint
Negative Isolation High Alarm Setpoint
Negative Isolation High Warning Setpoint
Negative Isolation Low Warning Setpoint
Negative Isolation Low Alarm Setpoint
Audible Alert
Operating Mode (audible or slient)
Delay Time Base (seconds or minutes)
Delay Setting (0-60)
Alarm Quiet Period Starting Hour (0-23)
Alarm Quiet Period Ending Hour (0-23)
Engineering Units
Inches of Water or Pascals
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FMS-1655M
Table of contents
General ......................................................................................................................................................................................... 4
Specications ......................................................................................................................................................................... 4
Part Number Guide ................................................................................................................................................................ 5
Overview ................................................................................................................................................................................ 8
Mounting/Wiring .......................................................................................................................................................................... 9
Installation .............................................................................................................................................................................. 9
Remote sensor mounting procedure ...................................................................................................................................... 9
Display mounting procedure (surface mount) ...................................................................................................................... 10
Flush thin mount mounting procedure .................................................................................................................................. 11
Installation detail view .......................................................................................................................................................... 12
Basic programming ................................................................................................................................................................... 14
Main display screen.............................................................................................................................................................. 14
Conguring Room Pressure Monitor .................................................................................................................................... 14
Setting up alarm limits .......................................................................................................................................................... 14
Selecting displayed units ...................................................................................................................................................... 15
Conguring display options .................................................................................................................................................. 15
Adding password security .................................................................................................................................................... 16
Cleaning the display.................................................................................................................................................................. 17
Alarm setpoints ......................................................................................................................................................................... 18
Setup menu tree ........................................................................................................................................................................ 19
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FMS-1655M
General
Specications
Electrical
Pressure Range ……………………………………………………………………………………………………………………… ±0.2500 “WC
Accuracy of Measurement ….....………………………………………………………………………………………………………… ±0.5% FS
*NIST Traceable / Individual certication available as option
Power Supply .....…… Class 2, 24VAC ±10%, 30VA universal 120/240 to 24 VAC, 60/50 Hz, step-down isolation transformer provided
Recommended Cable Type ....………………………………………………………………………………………...…………… Belden 1325A
Communications
BACnet® MS/TP Network……....……………………………………………………...………………Two-wire twisted pair, RS-485 signaling
Recommend Cable Type……...........…………………………………………………………………………………......…………Belden 3107A
Touchscreen User Interface
LCD Size ……………………………………………………………………………………………………………...……………… 3.2” diagonal
LCD Type ………………………………………...…………………………………………………………………......…………… Transmissive
Resolution …………………………………....………………………………………………………………………..………… 240 x 320 portrait
Viewing Area ….……………………………………………………………………………………………………...…… 50.60 mm x 66.80 mm
Color Depth …………………………………………………………………………………………………………..……… 18-bit or 262K colors
Backlight Color …....………………………………………………………………………………………………...………………………… White
Luminous Intensity …………………………………………………………………………………………….…..……………… min 2500 cd/m2
FMS-1655M Monitor Surface Mount Enclosure …..………....……………………….………………………….………… 3”W x 5”H x 1.13”D
FMS-1655M Monitor Thin Mount Enclosure .............................................................................................................. 5”W x 8”H x 0.75”D
External Remote Sensor Housing ………………………….…………….……………………………………..………… 2.3”W x 4”H x 2.7”D
Stainless Steel Cover Plate for Flow Tube ……………………………….……………………………………..……… 2.7”W x 4.5”H x 0.2”D
Stainless Steel Cover Plate for Remote Sensor ………………………….……………………………………..……… 2.7”W x 4.5”H x 0.2”D
Surface Mount FMS-1655M Monitor with Power Supply ………………..……………………………….……...….....…… approx. wt. 3.7 lb.
Flush Thin Mount FMS-1655M Monitor with Power Supply ………………....…………………………………......……… approx. wt. 5.4 lb.
FMS-1655M Monitor Mounting Options ………………………………......……………………………………………...……… Surface, Flush
Flow Tube Cover Plate Mounting …………………………..........………………………………………………...………….… Surface, Flush
Remote Pressure Sensor Mounting ……………..............……………………………………………………………......…….………… Flush
Environmental
Operating Temperature …………………………...……………………………………....…………………………… 32° to 125° F Operating
Operating Humidity ………....……………………………………………………………......……………… 10% - 95% RH, Non-condensing
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FMS-1655M
Part Number Guide
BRAND
LB = Johnson Controls
UNIT
FMS = Flow Monitor Station (FMS)
SERIES
1655M = BACnet Monitor
STYLE
S = Surface mount
T = Thin flush mount
REMOTE SENSOR
01 = Standard remote sensor
- -
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System Precautions
Warning
Failure to follow the wiring diagrams could result in damage to your equipment and could void your warranty. Under no
circumstances should a single transformer be split between actuator and controller. Doing so will damage the actuator, the
transformer, the controller or all units. A single 120/24V 30Va transformer is required for the controller and a separate 120/24V
20Va transformer is required for the actuator. This equipment contains electrostatic sensitive components. To prevent possible
damage, take precautions to prevent electrostatic discharge when handling or servicing this equipment by wearing an
approved ESD grounding wrist strap connected to an earth ground source.
CORRECT
120/24VAC, 30Va
Transformer
Supplied by Johnson
Controls
Controller
Actuator
FAST ACTING
ELECTRONIC ACTUATOR
CORRECT
120/24VAC, 20Va Third Party
Transformer
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FMS-1655M
System Precautions
Red / 24 VAC / 30VA
connected to the FMS
Only Class 2 wiring in this
compartment.
Ground
}
Transformer
50/60 Hz
Blue
White
}
1 Amp Slow Blow
Fuse
}
Stepdown Isolation Transformer
Black
(provided with FMS-1655)
240 VAC
50/60 Hz
120 VAC
50/60 Hz
Note:
This product should be installed with the manufacturer provided isolated power supply and connected to an electrical circuit
protected by a minimum 20A circuit breaker. This circuit breaker should be mounted in an approved electrical enclosure located
separately, but in close proximity to this product.
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LIT-12013119
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