Enviro VHC, VHA, VHB, VHS, VHM Installation Operation & Maintenance

VERTICAL HI-RISE FAN COILS SERIES B
INSTALLATION, OPERATION & MAINTENANCE
MODELS VHC/VHS/VHM VERTICAL HI-RISE
VHA/VHB TANDEM MASTER & TANDEM SLAVE
Supersedes: ET115.24-NOM4 (317) Form ET115.24-NOM4 (819)
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
FORM ET115.24-NOM4 (819)
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/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.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to specific situations:
Indicates a possible hazardous situation which will result in death or serious injury if proper care is not taken.
Identies 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.
Indicates a potentially hazardous situa­tion which will result in possible injuries or damage to equipment if proper care is not taken.
External wiring, unless specied 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 ENVIRO-TEC's published specications and must be performed only by a qualied
electrician. ENVIRO-TEC will NOT be responsible for damage/problems resulting from improper connections to the controls or application of improper control signals. Failure to follow this warn-
ing will void the manufacturer’s warranty and cause serious damage to property or personal injury.
2
Highlights additional information useful to the technician in completing the work being performed properly.
ENVIRO-TEC
FORM ET115.24-NOM4 (819)
CHANGEABILITY OF THIS DOCUMENT
In complying with ENVIRO-TEC's policy for continu­ous product improvement, the information contained in this document is subject to change without notice. ENVIRO-TEC 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 ENVIRO­TEC Service office.
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
SAFETY CONSIDERATIONS
The equipment covered by this manual is designed for safe and reliable operation when installed, operated, and maintained within its’ design specifications. To avoid personal injury or damage to equipment or prop­erty during installation, operation, and maintenance of this equipment, it is essential that these functions be performed by qualified, experienced personnel using good judgment and safe practices. See the following cautionary statements.
ELECTRICAL SHOCK HAZARDS. All power must be disconnected prior to in­stallation and servicing of this equipment. More than one power source may be pres­ent. Disconnect all power sources to avoid electrocution or shock injuries.
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.
CHANGE BARS
Revisions made to this document are indicated with a line along the left or right hand column in the area the revision was made. These revisions are to technical in­formation and any other changes in spelling, grammar or formatting are not included.
HOT P ARTS HAZARDS. Hot water and steam heating coils operate at tempera­tures that will cause severe burn injury. Some systems will continue to allow cir­culation of hot water, even with all control circuits deenergized. Before performing service at or near any heating coil, piping, or valve package component, disconnect all power and close all isolation valves, and allow the equipment to cool. As pre­viously mentioned, more than one power source may be present.
Check that the unit assembly and compo­nent weights can be safely supported by rigging and lifting equipment.
ENVIRO-TEC
MOVING PARTS HAZARDS. Power must be disconnected from the motor and blower prior to opening access panels. Motors can start automatically, and more than one power source may be present. Disconnect all power and control circuits prior to servicing to avoid serious crush­ing or dismembering injuries.
Electric resistance heating elements may start automatically. Disconnect all power and control circuits, and allow the elements to cool before servicing. Again, more than one power source may be present.
All assemblies must be adequately se­cured during lifting and rigging by temporary supports and restraints until equipment is permanently fastened and
set in its nal location.
All unit temporary and permanent sup­ports must be capable of safely sup-
porting the equipment’s weight and any
additional live or dead loads that may be encountered. All supports must be designed to meet applicable local codes and ordinances.
3
FORM ET115.24-NOM4 (819)
All fastening devices must be designed to mechanically lock the assembly in place without the capability of loosening or breaking away due to system operation and vibration.
Secure all dampers when servicing damper, actuator or linkages. Dampers may activate automatically, disconnect control circuits to avoid injury.
Protect adjacent flammable materials
when brazing, Use ame and heat pro-
tection barriers where needed. Have re
extinguisher available and ready for im­mediate use.
Never wear bulky or loose tting cloth­ing when working on any mechanical equipment. Gloves should only be worn when required for proper protection from heat or other possible injury. Safety glasses or goggles should always be worn when drilling, cutting, or working with chemicals such as refrigerants or lubricants.
Never pressurize any equipment beyond
specied test pressures. Always pressure test with some uid or inert gas such as
clear water or dry nitrogen on refrigera­tion systems to avoid possible damage or injury in the event of a leak or component failure during testing.
The manufacturer assumes no respon­sibility for personal injury or property damage resulting from improper or un­safe practices during the handling, in­stallation, service, or operation of any equipment.
TROUBLESHOOTING REFERENCE
Component Description Guide Name Option Description
Fan Relay Board (FCRB) –
Fan Coil Relay Board (FCRB)
Fan Relay Board II (FRBii)
G3 PWM Board Fan Coil EC Motor IOM
NOTE: All documents downloadable at www.enviro-tec.com.
Installation, Operation and Maintenance
Fan Relay Board II (FRBii) – Installation, Operation and Maintenance
1st generation relay board, 24V Control Packages, units shipped before 3/31/2017
2nd generation relay board, 24V Control Packages
ECM controller on variable speed ECM units
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ENVIRO-TEC
VH SERIES B FEATURES
SEE SECTION 6 - Dimensional Data FOR DIMENSIONAL DRAWINGS
Risers (Optional)
FORM ET115.24-NOM4 (819)
(Optional, Shipped Loose)
Supply Air Grille
Room Thermostat
(Optional, Shipped Loose)
Incoming Power
Disconnect switch
(Optional With
Electric Heat)
Control Enclosure
Access Door
Blower Shield
(Optional)
Supply Air Opening Knockout Typical
Removable Riser Chase
(Optional)
Controls (Refer to Appropriate Relay Board IOM if Present)
Slide Out Blower Assembly
Deplugable Motor
Outside Air Inlet (optional)
Return Air/Access Panel (Optional, Shipped Loose)
Note: Some optional items are included with other features.
Hydronic Cooling/ Heating Coil
Air Filter
Drain Pan With "P-Trap", Fixed Standard
(Optional Slideout)
ENVIRO-TEC
5
FORM ET115.24-NOM4 (819)
TABLE OF CONTENTS
SECTION 1 - RECEIPT & INSTALLATION ............................................................................................................11
Preface .........................................................................................................................................................11
Unpacking & Inspection .................................................................................................................................11
Ship Loose Items ..........................................................................................................................................11
Handling & Installation ..................................................................................................................................12
Cooling/Heating Medium Connections ...........................................................................................................12
Flex Hose .....................................................................................................................................................14
Factory Installed Risers ................................................................................................................................14
Factory Furnished, Field Installed Risers .....................................................................................................15
Field Furnished and Installed Piping or Risers .............................................................................................16
Riser Connection ..........................................................................................................................................16
Ductwork Connections .................................................................................................................................17
Dual Air Discharge Units .......................................................................................................................17
Field Reconfigurable Risers and Discharge Openings ...................................................................................18
Riser Reconguration ..........................................................................................................................18
Discharge Opening Reconfiguration .............................................................................................................18
Wall Framing .................................................................................................................................................19
Tandem Master & Tandem Slave Unit Installation ........................................................................................19
Outside Air Connection .................................................................................................................................20
Manual Outside Air Damper ............................................................................................ .............................20
Motorized Outside Air Damper ............................................................................................ .........................20
Electrical Connections Shock / Electrical Hazards .........................................................................................20
Thermostats .................................................................................................................................................21
SECTION 2 - START-UP .........................................................................................................................................23
General .........................................................................................................................................................23
Cooling/Heating System ...............................................................................................................................23
Air System Balancing ...................................................................................................................................24
Water System Balancing ..............................................................................................................................24
Controls Operation .......................................................................................................................................24
Fan Coil EC Motor Control .............................................................................................................................25
G3 PWM Board .....................................................................................................................................25
PWM Board Status LED ........................................................................................................................25
G3 PWM Status Descriptions ................................................................................................................26
Adjusting EC Motor Speed ....................................................................................................................27
2 – 10 VDC Proportional Motor Control ..........................................................................................................29
EC Motor Troubleshooting Guidelines ............................................................................................................32
Checking EC Wire Harnesses ........................................................................................................................35
EC Motor and Driver .......................................................................................................................................35
Constant Airow/Constant Torque EC Motors .......................................................................................35
Constant RPM EC Motors .....................................................................................................................36
Constant RPM EC Motor Driver Enable Jumper ...................................................................................37
ECM 3-Speed Constant Torque Motor Troubleshooting Guide ......................................................................38
Procedure for Checking ECM Constant Torque Wiring Harnesses .......................................................39
ECM Constant Torque Motor Connections ............................................................................................39
ECM Constant Torque Motor Specications ..........................................................................................40
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ENVIRO-TEC
TABLE OF CONTENTS (CONT'D)
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE ...................................................................42
General .........................................................................................................................................................42
Motor/Blower Assembly ................................................................................................................................42
Coil .................................................................................................................................................................42
Electric Resistance Heater Assembly .............................................................................................................42
Electrical Wiring & Controls ..........................................................................................................................43
Valves & Piping .............................................................................................................................................43
Filters, Throwaway .......................................................................................................................................44
Drain .............................................................................................................................................................44
Optional Removable Drain Pan ....................................................................................................................44
Replacement Parts .......................................................................................................................................44
SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLIST .............................................................46
SECTION 5 - TROUBLESHOOTING ......................................................................................................................48
SECTION 6 - DIMENSIONAL DATA .......................................................................................................................51
Vertical Hi-Rise Tandem Units
VHA/VHB Installation Instructions ..................................................................................................................75
Receipt & Initial Installation ...................................................................................................................75
Temperature ...................................................................................................................................................79
FORM ET115.24-NOM4 (819)
ENVIRO-TEC
7
FORM ET115.24-NOM4 (819)
LIST OF FIGURES
FIGURE 1 - Flex Hose Connections .....................................................................................................................13
FIGURE 2 - Ball Valve With Memory Stop............................................................................................................13
FIGURE 3 - Factory Installed Risers ....................................................................................................................14
FIGURE 4 - Factory Installed Risers, Master/Slave Conguration .......................................................................15
FIGURE 5 - Factory Furnished, Field Installed Risers .........................................................................................15
FIGURE 6 - Factory Furnished, Field Installed Risers, Master/Slave ..................................................................15
FIGURE 7 - Field Furnished and Installed Risers ................................................................................................16
FIGURE 8 - Field Furnished and Installed Risers Master/Slave ..........................................................................16
FIGURE 9 - Knockout Removal ............................................................................................................................18
FIGURE 10 - Critical Penetration Areas .................................................................................................................19
FIGURE 11 - Outside Air Connection .....................................................................................................................20
FIGURE 12 - G3 PWM Board .................................................................................................................................25
FIGURE 13 - Program Mode (Conguration Switch 1 ON) ....................................................................................26
FIGURE 14 - Constant RPM and Constant Torque EC Motors Example Fan Calibration Curve ...........................27
FIGURE 15 - Constant Airow and Constant Torque EC Motors Example Fan Calibration Curve ........................27
FIGURE 16 - High Speed Adjust ............................................................................................................................28
FIGURE 17 - Medium Speed Adjust .......................................................................................................................28
FIGURE 18 - Low Speed Adjust .............................................................................................................................29
FIGURE 19 - Normal Three Speed Operation ........................................................................................................29
FIGURE 20 - Mode to 2–10 VDC Proportional Control ..........................................................................................30
FIGURE 21 - Max Speed Adjust .............................................................................................................................30
FIGURE 22 - Min Speed Adjust ..............................................................................................................................31
FIGURE 23 - Normal 2 – 10 VDC Speed Control ...................................................................................................31
FIGURE 24 - Constant CFM/Constant Torque EC Motors (1/3 HP Shown) ...........................................................35
FIGURE 25 - Constant CFM/Constant Torque EC Motor Driver.............................................................................35
FIGURE 26 - Constant RPM EC Motor (1/4 HP Shown) ........................................................................................36
FIGURE 27 - Constant RPM EC Motor Driver ........................................................................................................36
FIGURE 28 - Constant RPM EC Driver EC Motor Enable Connector ....................................................................37
FIGURE 29 - Motor Power and Signal Connectors ................................................................................................39
FIGURE 30 - Motor/Blower Assembly ....................................................................................................................42
FIGURE 31 - Electric Heat .....................................................................................................................................43
FIGURE 32 - Drain Pan Removal ...........................................................................................................................44
FIGURE 33 - Model VHM, Vertical Concealed Master High Rise, FCU, 88" Cabinet ............................................51
FIGURE 34 - Model VHS, Vertical Concealed Slave High Rise, FCU, 88" Cabinet ...............................................52
FIGURE 35 - Model VHA/VHB, Vertical Hi-Rise Tandem Fire Rated and Non-Fire Rated, FCU Combinations,
88" Cabinets .....................................................................................................................................53
FIGURE 36 - Model VH, Vertical Concealed High Rise Fan Coil Unit with 79" Cabinet .........................................55
FIGURE 37 - Model VHM, Vertical Concealed Master High Rise Fan Coil Unit with 79" Cabinet ..........................56
FIGURE 38 - Model VHS, Vertical Concealed Slave High Rise Fan Coil Unit with 79" Cabinet ............................57
FIGURE 39 - Model VHA/VHB, Vertical Hi-Rise Fire Rated and Non-Fire Rated FCU Combinations,
79" cabinets ......................................................................................................................................58
FIGURE 40 - Model VH, Vertical High Rise Coil Unit, Aluminum Discharge Grille .................................................60
FIGURE 41 - Model VHC/VHM/VHA Vertical High Rise Fan Coil Unit Arrangement Designations ........................61
FIGURE 42 - Model VHC w/o Risers & VHS/VHB Vertical High Rise Fan Coil Units, Unit Arrangement
Designations .....................................................................................................................................62
FIGURE 43 - Model VH Vertical High Rise Coil Unit Outside Inlet Dimensions .....................................................62
FIGURE 44 - Model VHM/VHA/VHC Tandem Master & Tandem Slave Unit Conguration Fan Coil Unit ..............64
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ENVIRO-TEC
LIST OF FIGURES (CONT'D)
FIGURE 45 - Assembly Instructions Return Panel with Latches, Quick Opening or Tamper Proof,
Model VHC/VHM/VHS High Rise FCU .............................................................................................65
FIGURE 46 - Preparation Instructions for Model VHC/VHM Vertical High Rise FCU "Ship Loose"
Riser Assemblies ..............................................................................................................................66
FIGURE 47 - Full Louvered Aluminum Return Air/Wall Panel Model VH Vertical High Rise Fan Coil Unit ............67
FIGURE 48 - Model VH Vertical High Rise Fan Coil Unit Standard Surface Mount Wall Panel .............................68
FIGURE 49 - Recessed Wall Panel Model VH Vertical High Rise Fan Coil Unit ....................................................69
FIGURE 50 - Model VH Vertical High Rise Fan Coil Unit Standard Return Wall Panel with ADA Thermostat .......70
FIGURE 51 - Suggested Riser Floor Openings VHC & VHM .................................................................................73
FIGURE 52 - Riser Terminology, Model VHC, VHM, VHA Units .............................................................................74
FIGURE 53 - Standard Installation .........................................................................................................................76
FIGURE 54 - Alternate Installation .........................................................................................................................76
FIGURE 55 - Mounting Details ...............................................................................................................................77
FORM ET115.24-NOM4 (819)
LIST OF TABLES
TABLE 1 - G3 Status LED Definition ....................................................................................................................25
TABLE 2 - EC Motor Troubleshooting Guidelines ................................................................................................32
TABLE 3 - Signal Connector ................................................................................................................................36
TABLE 4 - Power Connector ................................................................................................................................36
TABLE 5 - CON1, Power Input ............................................................................................................................36
TABLE 6 - CON502 (if present), Programming Connector ..................................................................................36
TABLE 7 - CON302, PWM Signal Input ...............................................................................................................36
TABLE 8 - CON503 (if present), Motor Enable Input ...........................................................................................37
TABLE 9 - CON202, Feedback from EC Motor Hall Sensor ................................................................................37
TABLE 10 - CON201, Output Power to Motor .......................................................................................................37
TABLE 11 - ECM Constant Torque Motor Specific Troubleshooting Guidelines ....................................................38
TABLE 12 - The ECM Constant Torque Motor Power Wiring Harness ..................................................................39
TABLE 13 - The Standard ECM Constant Torque Motor Signal Wiring Harness (White Plug) ..............................40
TABLE 14 - The High Static ECM Constant Torque Motor Signal Wiring Harness (Red Plug) ..............................40
TABLE 15 - ECM Constant Torque Motor Part Numbers .......................................................................................40
TABLE 16 - Motor Signal Tap Specifications..........................................................................................................40
TABLE 17 - General ECM Constant Torque Motor Specifications .........................................................................40
TABLE 18 - Discharge Register Performance Data, VH Standard FCU 88" Cabinet,
Single and Double Supply ..................................................................................................................71
TABLE 19 - Discharge Register Performance Data, VH Standard FCU 79" Cabinet,
Single and Double Supply ..................................................................................................................72
TABLE 20 - SI Metric Conversion ..........................................................................................................................79
ENVIRO-TEC
9
FORM ET115.24-NOM4 (819)
THIS PAGE INTENTIONALLY LEFT BLANK
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ENVIRO-TEC
FORM ET115.24-NOM4 (819)
SECTION 1 - RECEIPT & INSTALLATION
PREFACE
ENVIRO-TEC ment which can, with proper installation, operation, and regular maintenance, give trouble-free operation and long service.
Equipment is initially protected under the manufac­turers’ standard warranty; however, this warranty is provided under the condition that the steps outlined in this manual for initial inspection, proper installation, regular periodic maintenance, and everyday operation of the equipment be followed in detail. This manual should be fully reviewed in advance of any actual work being done on the equipment. Should any questions arise, please contact your local Sales Representative or the factory BEFORE proceeding.
The equipment covered by this manual is available with a vast variety of options and accessories. Consult the approved unit submittal, order acknowledgement, and other manuals for details on the options and ac­cessories provided with the equipment on each project.
UNPACKING & INSPECTION
All units are carefully inspected at the factory through­out the manufacturing process under a detailed qual­ity assurance program. All factory furnished major components and subassemblies are carefully tested for proper operation and verified to be in full compliance with the customer order and quality assurance docu­ments.
Each unit is then carefully packaged for shipment to avoid damage during normal transport and handling. The equipment must be stored in a dry place in the proper orientation as marked on the packaging.
All shipments are made F.O.B. factory and it is the responsibility of the receiving party to inspect the equipment upon arrival. Any obvious damage to the packaging and/or its contents should be recorded on the bill of lading and a claim should be filed with the freight carrier.
fan coils represent a prudent invest-
1
After determining the condition of the unit’s exterior, carefully remove each unit from the packaging and in­spect for hidden damage. At this time, check to make sure that “ship loose” items such as grilles, decorator panels, and thermostats are accounted for. Any hidden damage should be recorded and immediately reported to the carrier, and a claim filed as before. In the event a claim for shipping damage is filed, the unit, shipping package, and all packing must be retained for physical inspection by the freight carrier. All equipment should be stored in the factory shipping package with internal packing in place until installation.
A series of rigorous leak tests are performed on all of the piping installed in this equipment to ensure piping integrity . Because this equipment may be shipped with factory supplied external riser piping, it is necessary for the receiving inspector to carefully inspect this pip­ing for signs of shipping damage. If damage is present, a claim must be filed with the freight carrier.
At the time of receipt, the equipment type and arrange­ment should be verified against the order documents. Should any discrepancy be found, the local Sales Rep­resentative should be notified immediately so that the proper action may be instituted. Should any question arise concerning warranty repairs, the factory must be notified BEFORE any corrective action is taken. Where local repairs or alterations can be accomplished, the factory must be fully informed as to the extent and expected cost of those repairs before work is begun. Where factory operations are required, the factory must be contacted for authorization to return equipment and a Return Authorization Number will be issued. Unau­thorized return shipments of equipment and shipments not marked with an authorization number will be re­fused. In addition, the manufacturer will not accept any claims for unauthorized expenses.
SHIP LOOSE ITEMS
Several components are shipped loose for field instal­lation. These may include: thermostat, return air ac­cess panel, return air access panel fasteners, discharge grille(s), risers (optional). These parts are shipped loose to offer protection against shipping and job-site damage. Refer to packing slip.
ENVIRO-TEC
11
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
HANDLING & INSTALLATION
While all equipment is designed and fabricated of
sturdy construction and may present a rugged appear-
ance, great care must be taken to assure that no force
or pressure be applied to the coil, risers, piping or drain
stub-outs during handling. Do not use the risers for lift-
ing the unit. Also, depending on the options and acces-
sories, some units could contain delicate components
that may be damaged by improper handling. Wherever
possible, all units should be maintained in an upright
position and handled by the exterior casing, with no
impact forces applied that may damage internal com-
ponents or painted surfaces.
The equipment covered in this manual IS NOT suit-
able for outdoor installations. The equipment should
never be stored or installed where it may be subjected
to a hostile environment such as rain, snow, extreme
temperatures, or hazardous chemicals.
During and after installation, special care must be tak-
en to prevent foreign material such as paint, plaster,
and drywall dust from being deposited in the drain pan,
electric heater, motor and blower wheels. Failure to do
so may have serious adverse effects on unit operation
and in the case of the heater, motor and blower assem-
bly, may result in immediate or premature failure. All
manufacturers’ warranties are void if foreign material
is allowed to be deposited on the heater, motor or blow-
er wheels of any unit. Some units and/or job conditions
may require some form of temporary covering during
construction.
compatibility. The routing and sizing of all piping, and the type and sizing of all wiring and other elec­trical components such as circuit breakers, disconnect switches, etc. should be determined by the individual job requirements and should not be based on the size and/or type of connection provided on the equipment. All installations should be made in compliance with all governing codes and ordinances. Compliance with all codes is the responsibility of the installing contractor.
Any new field connections must ensure all openings are sealed and properly insulated. Improper sealing or insulation can result in untreated air infiltrating the unit. Units are not internally thermally isolated, proper thermal breaks required at installation to prevent ad­verse effects.
For seismic certied installation, refer­ence the seismic installation document.
COOLING/HEATING MEDIUM CONNECTIONS
Toxic residues and loose particles result-
ing from manufacturing and eld piping
techniques such as joint compounds,
soldering ux, and metal shavings may be
present in the unit and the piping system. Special consideration must be given to system cleanliness when connecting to solar, domestic or potable water systems.
Condensate pan is internally sloped toward drain con-
nection. Make assurance that unit is level and plumb.
Level the unit to insure proper coil operation and con-
densate drainage. After units are positioned and risers
centered in pipe chase, plumb the unit in two directions,
using unit casing as a reference. Avoid any interference
structural components inside the cabinet while using
bolts or lag screws to anchor the unit to building. See
Figure 10 on page 19 for critical penetration areas.
After mounting the unit, it is then ready for the various
service connections such as water, drain and electri-
cal. At this time it should be verified that the proper
types of service are actually provided to the unit. On
those units requiring chilled water and/or hot water,
the proper line size and water temperature should be
available to the unit. The electrical service to the unit
should be compared to the unit nameplate to verify
12
Submittals and Product Catalogs detailing unit opera­tion, controls, and connections should be thoroughly reviewed BEFORE beginning the connection of the various cooling and/or heating mediums to the unit.
All accessory valve packages should be installed as re­quired, and all service valves should be checked for proper operation.
If coil and valve package connections are made with “sweat” or solder joint, care should be taken to assure that no components in the valve package are subjected to a high temperature which may damage seals or other materials. Many two-position electric control valves, depending on valve operation, are provided with a manual-opening lever. This lever should be placed in the “open” position during all soldering or brazing op-
®
erations. Solder joints with Sil-fos
, phos-copper, or
similar high temperature alloy. Do not use soft solder.
ENVIRO-TEC
SECTION 1 - RECEIPT & INSTALLATIONFORM ET115.24-NOM4 (819)
BRAIDED FLEX HOSE
P/N-PC-00-0283
3/4" FEMALE SWIVEL
MEMORY STOP
1/2" SWEAT
TO
RISER
UNIT ISOLATION BALL VALVE P/N PC-00-0282
2-5/8" MINIMUM
RECOMMENDED RADIUS
GASKET P/N PH-05-0047 OR PH-05-0048
ADAPTER FITTING P/N PR-04-0108
TO
COIL
1/2"
FEMALE
SWIVEL
VITON O-RING
P/N PR-07-0115
3/4" NPSH
FIG. 2C
TOP VIEW
TO REGULATE FLOW (FIG. 2C):NOTE: Valve package isolation valve shown, typical for riser shut off valve.
FIG. 2B
TOP VIEW
FIG. 2A
EXPLODED VIEW
TO DESIRED FLOW
MEMORY STOP ADJUSTED
VALVE HANDLE WITH
"EAR" (BOTH SIDES)
MEMORY STOP
"EARS"
MEMORY STOP
ADJUSTMENT RANGE
MEMORY STOP
STEP 1. SET VALVE TO DESIRED FLOW.
STEP 4. TIGHTEN SCREW AT TOP OF VALVE.
STEP 3. TURN MEMORY STOP TO "EAR" ON VALVE BODY.
STEP 2. LOOSEN SCREW AT THE TOP OF VALVE.
1
LD13870
FIGURE 1 - FLEX HOSE CONNECTIONS
FIGURE 2 - BALL VALVE WITH MEMORY STOP
ENVIRO-TEC
LD13871
13
FLEX HOSE
RISERS
INSTALLED
FACTORY
TYPICAL
REMOVE STRAP,
SHIPPING BRACKET,
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
All Vertical Hi-Rise and Tandem Master & Tandem Slave units use Kevlar reinforced braided stainless steel flexible hoses for all water piping between the coil and the risers or field piping. This factory piping includes two ball valves per coil, with memory stop. These hoses are designed with swivel connections on both ends, and require either a gasket or O-ring for positive sealing. See Figure 1 on page 13 for con­nection details.
These hoses are designed to provide for riser move­ment due to thermal expansion, and allow for quick, easy coil removal through the use of the swivel con­nections.
During transit, vibration may cause a connection to loosen. Therefore, all threaded connections must be checked during unit installation. Any fitting that is loose must be tightened. The stationary side of any swivel connection must be prevented from twisting during tightening by the use of a “backup” wrench. Pressure test all joints before applying water.
Some hose-to-coil joints are furnished
with a removable vulcanized ber gasket.
This gasket (Part No. PH-05-0047) must be replaced each time the joint is broken. Later model units have a hose-to-coil joint with a black EDPM gasket (Part No. PH-05-0048). This gasket is re-useable, but may be replaced should it become damaged and no longer seal.
Units provided with factory installed drain risers are supplied with “full height” drain risers that extend 3” above the top of the unit, and include the standard “swaged” section at the top. Field piping and venting of the drain riser must be furnished and installed by others.
Factory installed risers are strapped to the unit for ship­ment to prevent damage during transit. These shipping straps must be removed at installation to allow move­ment of the risers to assure proper alignment.
See Figure 3 on page 14 and Figure 4 on page 15 for details.
At no time should a unit be lifted, moved, or otherwise handled by the risers.
FACTORY INSTALLED RISERS
Units provided with factory installed water and drain risers include fully insulated risers as specified per or­der. The flex hose and ball valve described above is assembled to the riser and pressure tested at the fac­tory. Each unit is configured for a specific location in the building, and is marked with that location by room number, floor, riser number, or other identification as specified per order.
14
LD13872
FIGURE 3 - FACTORY INSTALLED RISERS
ENVIRO-TEC
VITON O-RING
P/N PR-07-0115
HOSE CLAMP
SHIPPED LOOSE RISERS
FIGURE 4 - FACTORY INSTALLED RISERS, MASTER/SLAVE CONFIGURATION
FACTORY FURNISHED, FIELD INSTALLED RISERS
Units provided with factory furnished, field installed water and drain risers include fully insulated risers as specified per order, which are shipped separately for installation on the job prior to receipt of the units. The ball valve previously described is assembled to the riser and pressure tested at the factory. The risers are pack­aged as a “kit” for a specific location in the building, and each “kit” is marked with that location by room number, floor, riser number, or other identification as specified per order.
Riser “kits” that include drain risers are supplied with “full height” drain risers that extend 3” above the top of the unit, and include the standard “swaged” section at the top, similar to factory installed riser sets. Field piping and venting of the drain riser must be furnished and installed by others.
Master Unit
(Model VHM)
SHIPPING BRACKET, REMOVE STRAP, TYPICAL
FIELD PIPING EXCEPT ENVIRO-PAC UNITS
HOSE CLAMP
Slave Unit
(Model VHS)
TM
LD13873
SECTION 1 - RECEIPT & INSTALLATIONFORM ET115.24-NOM4 (819)
FIGURE 5 - FACTORY FURNISHED, FIELD INSTALLED RISERS
VITON O-RING, P/N PR-07-0115
FIELD FURNISHED & INSTALLED PIPING
SHIPPED LOOSE RISERS
HOSE
CLAMP
MASTER UNIT (MODEL VHM)
VITON O-RING, P/N PR-07-0115
HOSE CLAMP
SLAVE UNIT
(MODEL VHS)
FIGURE 6 - FACTORY FURNISHED, FIELD INSTALLED RISERS, MASTER/SLAVE
1
LD13866
LD13867
See Figure 5 on page 15 for details.
ENVIRO-TEC
Field installed risers MUST be installed with the proper unit connection height and orientation to allow for correct unit installation at a later date. Swage is always oriented up. Refer to unit dimensional drawings.
15
FIELD FURNISHED AND INSTALLED PIPING
& INSTALLED RISERS
FIELD FURNISHED
HOSE
CLAMP
HOSE CLAMP
OR RISERS
Units provided for field furnished and installed water and drain piping or risers include the flex hose and ball valve assemblies previously described. These hose and valve assemblies include a stub of copper tube for field connection to the unit piping. The factory hose and valve assemblies are marked by connection type and retracted inside the unit for shipment. Do not braze the pipe stub without opening the ball valve and dis­connecting the hose. Riser stub out should slope down slightly away from the riser. This prevents condensa­tion from dripping at the bottom of a riser column.
See Figure 7 on page 16 for details.
Field fabricated/installed piping and ris­ers MUST be installed with the proper unit connection height and orientation to allow for correct unit installation at a later date. Refer to unit dimensional drawings.
RISER CONNECTION
Do not rigidly attach risers to this equipment. Risers must be free to move with thermal expansion and con­traction. Units and risers are designed to accommodate a maximum of 3” (1-1/2” up and 1-1/2” down) total vertical movement. To achieve this range of move­ment, the risers must be installed according to the conditions outlined below. If the total combined riser expansion will exceed 3”, additional expansion com­pensation, such as loops and expansion joints, or alter­nate riser anchoring techniques must be field furnished and installed.
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
FIELD FURNISHED & INSTALLED RISERS
HOSE
CLAMP
LD13874
FIGURE 7 - FIELD FURNISHED AND INSTALLED RISERS
Factory furnished risers are designed with a “swage” or socket in the top to accommodate 2” of tailpiece insertion from the riser above. The riser configuration, when combined with the required length as provided by the customer, is designed to position the riser-to­unit stub out piping at the vertical center of the riser slot in the unit casing. See unit submittal drawings for dimensional details. Due to building construction vari­ations, some risers may require cutting or lengthening to correctly position the riser. Any field modifications are the responsibility of the installer.
16
LD13875
FIGURE 8 - FIELD FURNISHED AND INSTALLED RISERS MASTER/SLAVE
ENVIRO-TEC
SECTION 1 - RECEIPT & INSTALLATIONFORM ET115.24-NOM4 (819)
After all connections are completed, and prior to insu­lating and furring-in of any riser or piping connections, the system should be tested for leaks. Since some com­ponents are not designed to hold pressure with a gas, hydronic systems should be tested with clear water. Care should be taken to completely drain the system, or otherwise protect it from freezing in cold weather.
Standard unit operating pressure is 300 psig maximum. Field test pressure must not exceed 400 psig maximum. Some op­tional or special unit piping components may have lower pressure ratings than the standard unit. All valve and piping com-
ponent pressure ratings must be veried
before applying test pressure to the unit. All water coils and unit piping must be
protected from freezing after initial lling
with water. Unit coils and piping may still hold enough water to cause damage when exposed to freezing temperatures, even after the system is drained.
In the event that leaking or defective components are discovered, the Sales Representative must be notified BEFORE any repairs are attempted. All leaks should be repaired before proceeding with installation.
After all risers and piping are installed and pressure tested, all riser joints must have the insulation joint sealed and all other piping must be insulated in compli­ance with the project specifications. All chilled water risers, piping, and valves must be insulated or located over a drain pan, to prevent damage from condensa­tion. This includes factory and field piping inside the unit cabinet.
The drain should always be connected and piped to an acceptable disposal point. For proper moisture carry­off, the drain piping should be sloped away from the unit at least 1/8” per foot. A drain trap is integral to the unit and is necessary for odor containment. The drain riser and piping must be installed to avoid pinching or kinking the unit drain tube.
Any required piping or riser penetration fire blocking is the responsibility of the installer. All penetrations for piping and risers should be sealed with materials and techniques suitable for all governing codes and ordi­nances.
DUCTWORK CONNECTIONS
1
All ductwork and/or supply and return grills should be installed in accordance with the project plans and specifications. If not included on the unit or furnished from the factory, supply and return grilles should be provided as recommend in the product catalog.
All units must be installed in non-hazardous areas. Zero clearance to combustible materials is allowed.
Units provided with outside air for ventilation should have some form of low temperature protection to pre­vent coil freeze-up. This protection may be any of sev­eral methods such as a low temperature thermostat to close the outside air damper or a preheat coil to temper the outside air before it reaches the unit. It is recom­mended that outside air is pretreated to regulate its temperature and humidity ratio
It should be noted that none of these methods would adequately protect a coil in the event of power failure. The safest method of freeze protection is to use glycol in the proper percent solution for the coldest expected air temperature.
Flexible duct connections should be used on all air han­dling equipment. All ductwork and insulation should be installed to allow proper access to all components for service and repair such as filters motor/blower as­semblies, etc.
Dual Air Discharge Units
All dual discharge units are provided with a sight and sound baffle in the discharge plenum area (except top discharge units). It is recommended that a discharge grille with a damper be provided in one of the dis­charge locations to aid in air balancing. Dual discharge units with top discharge must be provided with a field supplied damper in the top discharge duct.
Do not inhibit inlet or outlet connections. Quickly turning off the inlet or rapid reduction in ductwork can cause system
effects that impact airow. Reductions in airow can cause electric heaters to
overheat, condensation to form, or other unintended consequences, which can re­sult in injury, property damage, equipment damage, as well as void factory warranty.
ENVIRO-TEC
17
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
INSULATION
SLIT CABINET
AS REQ'D
CLIP "TABS"
AS REQ'D
CLIP "TABS"
AS REQ'D
DRYWALL
STOP
FOLD OUT
FIELD RECONFIGURABLE RISERS AND DISCHARGE OPENINGS
Riser Reconfiguration
Vertical Hi-Rise units are furnished with riser slot “knockouts” in the casing back and both sides. Should it be necessary to relocate risers in the field, the water risers may be disconnected at the swivel joint on the riser isolation valve, and removed from the unit. The drain riser may be removed by moving the drain tube hose clamp and removing the riser tube from the drain hose.
The water riser slot “knockouts” may be removed by clipping the “tabs” to separate the inner portion of the knockout. See Figure 9 on page 18 for details. After opening the riser slot, make a vertical slit in the cabinet insulation with a sharp utility knife. This slit must be centered left to right, and full height in the slot. The water riser may now be re-installed at the desired loca­tion by inserting the valve through the new opening. Insert the valve through the opening with care to avoid damage to the cabinet insulation. Make sure that the swivel joint O-ring is undamaged, and re-attach the hose to the valve with the O-ring in place. Replace­ment O-rings (Part No. PR-07-0115) may be ordered through the parts department.
After relocating all the risers, pressure test the joints to assure system integrity.
The drain riser slot is already present on the back, left and right sides. To install the drain riser, insert the riser tube into the unit and connect the drain hose using the hose clamp preciously removed.
After all the risers have been relocated, inspect the cabinet insulation where the risers were removed, and repair any insulation damage before starting the unit and cover unused openings.
DISCHARGE OPENING RECONFIGURATION
Vertical Hi-Rise and Tandem Master & Tandem Slave units are furnished with discharge opening “knock­outs” in all four sides and the top. Should it be nec­essary to reconfigure a unit for a different discharge arrangement than originally provided, the new dis­charge opening may be created by clipping the tabs of the desired opening to remove the inner portion of the “knockout”. The side flanges may then be folded out to provide the drywall stops for the opening. See Figure 9 on page 18 for details.
After the new opening is created, the cabinet insulation must be trimmed out, and the edges of the insulation should be coated with duct board adhesive or appropri­ate liner tape to prevent erosion into the airstream.
LD13876
Any unused discharge openings must have the drywall stops bent back flush with the unit casing. The open­ing must then be covered with an insulated plate. Any cover plates and insulation must be provided and in­stalled by others.
Relocating a discharge opening on a double discharge unit may require removal or relocation of any factory provided sight and sound baffle. Consult the factory for details on requirements and relocation of sight and sound baffles.
Size 10 and 12 units factory furnished with double discharge do not have dis­charge “knockouts” to allow eld conver­sion to a single discharge. Consult the factory for details.
The manufacturer assumes no responsibility for unde­sirable system operation due to improper field design, equipment or component selection, and/or installation of ductwork, grilles, and other related components.
FIGURE 9 - KNOCKOUT REMOVAL
18
ENVIRO-TEC
SECTION 1 - RECEIPT & INSTALLATIONFORM ET115.24-NOM4 (819)
Electric Heat
Controls
Motor
Valves
Coil
Drain Pan
Risers
SIDE VIEW
Indicates critical
penetration area. Do
not penetrate, drill,
screw to, or use
mechanical fasteners
in shaded areas
.
Due to factory manufacturing tolerances and jobsite construction variations, some unit casing surface con­ditions may exist that could require additional fram­ing or shimming of the finished wall surface. ALL WORK REQUIRED TO ACHIEVE THE DESIRED FINISHED WALL SURFACE CONDITION IS THE RESPONSIBILITY OF OTHERS.
1. Attaching fasteners should be no longer than nec­essary to provide proper grip.
2. Do not locate fasteners where they could pen­etrate coils, risers, piping, electrical enclosures or other components.
3. Do not locate fasteners where they would pose a safety hazard during access or service on any in­ternal components.
4. Do not locate fasteners where they would impede the access or removal of any internal component.
5. Verify that all enclosure attachment points are lo­cated properly and do not pose any safety hazards or damage any internal components before bring-
ing the enclosure surface to nished condition (e.g., nish drywall or apply wall covering).
1
FIGURE 10 - CRITICAL PENETRATION AREAS
WALL FRAMING
LD13877
All wall framing is the responsibility of others. The Vertical Hi-Rise and Tandem Master & Tandem Slave unit casing is designed to be concealed by a finished wall or enclosure that is installed in the field by others. This enclosure may be a framed structure with gyp­sum board or other material covering as selected by others. Where desired, the gypsum board or paneling may be applied directly to the unit casing. If the direct application method is used, care must be taken when installing the fasteners so as not to damage any internal components. See Figure 10 on page 19 for critical penetration areas.
TANDEM MASTER & TANDEM SLAVE UNIT INSTALLATION
(See SECTION 6 - Dimensional Data for details) T andem Master & Tandem Slave units are shipped as a
factory assembled pair and are intended for installation with the space separating the units to be included in the wall between the units. Tandem Master & Tandem Slave units are available with fire rated and non-fire rated construction.
Non-fire rated unit pairs may be installed as required to achieve the finished wall configuration desired. W all framing and drywall application should be accom­plished as noted above.
Fire rated unit pairs are designed to be installed with the space between the units becoming part of a fire rated wall usually used to separate specific occupan­cies. These unit pairs must be installed according to the procedure shown on Tandem Master & Tandem Slave Installation Instructions to maintain the fire rating for the unit.
ENVIRO-TEC
19
MOTORIZED
AIR DAMPER
MANUAL OUTSIDE AIR DAMPER
FIGURE 11 - OUTSIDE AIR CONNECTION
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
MOTORIZED OUTSIDE AIR DAMPER
The standard motorized outside air damper is factory wired to open the damper when the fan is operating. Other damper operating sequences are available. See individual order documents to verify actual damper operation.
The motorized outside air damper is factory set to drive from full closed to full open. The damper may be ad­justed in the field to set the desired amount of outside air by the following steps:
1. Loosen the set screw in the damper actuator set collar and turn on all power and set all controls to call for full outside air. This should drive the damper actuator to the “full open” position.
2. Manually position the damper blade to achieve the desired amount of outside air.
3. Tighten the set screw to lock the damper blade to the actuator set collar.
OUTSIDE
4. Disconnect power or set controls to de-energize the outside air, and verify that the damper drives to the “closed” position.
5. Re-energize the outside air and verify that the damper returns to the position set in Step 2.
LD13877
ELECTRICAL CONNECTIONS SHOCK / ELECTRICAL HAZARDS
OUTSIDE AIR CONNECTION
The optional 6” diameter round outside air connec­tion is provided with either a round butterfly manual damper, or a rectangular motorized damper assembly, for outside air control. See Figure 11 on page 20 for details. Installation of outside air duct connections may require installation of a vapor barrier between the unit and the wall, and may require freeze protection con­trol devices. These components must be supplied and installed by others as required. It is recommended that all outside air be pretreated to regulate its temperature and humidity ratio.
MANUAL OUTSIDE AIR DAMPER
The manual outside air damper may be adjusted by loosening the wing nuts on the top and bottom, and setting the adjustment lever to the required position for the desired amount of outside air. The wing nuts are then tightened to lock the damper in place.
The unit nameplate lists the unit electrical characteris­tics such as the required supply voltage, fan and heater amperage, unit minimum circuit ampacity, and maxi­mum overcurrent protective device. The unit-wiring diagram shows all unit and field wiring. Since each project is different and each unit on a project may be different, the installer must be familiar with the wiring diagram and nameplate on the unit BEFORE beginning any wiring. Provide for adequately sized fuse, circuit breaker or disconnect means as applicable to meet lo­cal and national electrical codes. All electrical connec­tions should be checked for tightness prior to startup.
All components furnished for field installation, by ei­ther the factory or the controls contractor should be located and checked for proper function and compat­ibility. All internal components should be checked for shipping damage and any loose connections should be tightened to minimize problems during startup.
20
ENVIRO-TEC
SECTION 1 - RECEIPT & INSTALLATIONFORM ET115.24-NOM4 (819)
Any devices such as fan speed switches or thermostats that have been furnished from the factory for field in­stallation must be wired in strict accordance with the applicable wiring diagrams. Failure to do so could re­sult in personal injury or damage to components and will void all manufacturers’ warranties. Refer to the diagram within unit.
THERMOSTATS
Various types of thermostats are available for this unit. Unit surface mounted thermostats are provided with a drywall mud ring for field mounting. The mud ring may be located on the unit front or either side as ap­propriate in the field. For remote mounted thermostats, the mud ring should be removed from the unit and re­installed on the thermostat mounting box, or discarded as necessary. Unit surface mounted thermostats are provided with a plug assembly for easy connection.
The plug is polarity specific and connects only in one direction. Remote thermostats must be field wired to unit’s connection points as indicated on the unit’s wir­ing diagram.
The fan motor(s) should never be controlled by any wiring or device other than the factory furnished switch or thermostat/switch combination, without factory au­thorization.
All field wiring should be done in accordance with governing codes and ordinances. Any modification of the unit wiring without factory authorization will result in voiding of all factory warranties and will nullify any agency listings.
The manufacturer assumes no responsibility for any damages and/or injuries resulting from improperly field installed or wired components.
1
ENVIRO-TEC
21
FORM ET115.24-NOM4 (819)SECTION 1 - RECEIPT & INSTALLATION
THIS PAGE INTENTIONALLY LEFT BLANK
22
ENVIRO-TEC
FORM ET115.24-NOM4 (819)
SECTION 2 - START-UP
GENERAL
Before beginning any start-up operation, the start-up personnel should familiarize themselves with the unit, options and accessories, and control sequence to un­derstand the proper system operation. All personnel should have a good working knowledge of general start-up procedures and have the appropriate start-up and balancing guides available for consultation.
The building must be completely finished including doors, windows, and insulation. All internal walls and doors should be in place and in the normal position. In some cases the interior decorations, curtains and furniture may influence overall system performance by blocking return or supply air openings. The entire building should be as complete as possible before be­ginning any system balancing. Operation of the unit during construction is not recommended since con­struction dust will foul filters and coils and can seri­ously degrade unit performance.
The initial step in any start-up operation should be a final visual inspection. All equipment, duct-work, and piping should be inspected to verify that all systems are complete and properly installed and mounted and that no construction debris or foreign articles such as paper or drink cans are left in the units.
Fan coils are not intended for temporary heat/cool or ventilation. Units are not designed or equipped to operate in dusty construction environments. Operation of the units in conditions outlined above could result in damage.
Each unit should be checked for loose wires, free blower wheel operation, and loose or missing access panels or doors. Except as required during start-up and balancing operations, no fan coil units should be oper­ated without all the proper duct-work attached, supply and return grills in place, and all access doors and pan-
els in place and secure. A clean filter of the proper size and type must also be installed. Failure to do so could result in damage to the equipment or building and fur­nishings, and/or void all manufacturers’ warranties.
COOLING/HEATING SYSTEM
Prior to the water system start-up and balancing, the chilled/hot water systems should be flushed to clean out dirt and debris, which may have collected in the piping during construction. During this procedure, all unit service valves must be in the closed position. This prevents foreign matter from entering the unit and clog­ging the valves and metering devices. Strainers should be installed in the piping mains to prevent this material from entering the units during normal operation.
During system filling, air venting from the unit is ac­complished by the use of the standard manual, or op­tional automatic, air vent fitting installed on the coil. In the case of the manual air vent fitting, the screw should be turned counterclockwise no more than 1-½ turns to operate the air vent. Automatic air vents may be un­screwed one turn counterclockwise to speed initial venting but should be screwed in for automatic venting after start-up operations.
The air vent provided on the unit is not intended to replace the main system air vents and may not release air trapped in other parts of the system. Inspect the en­tire system for potential air traps and vent those areas independently as required. In addition, some systems may require repeated venting over a period of time to properly eliminate air from the system.
Do not exceed 300 PSIG operating pres­sure.
2
ENVIRO-TEC
23
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
AIR SYSTEM BALANCING
All ductwork must be complete and connected, and all grilles, filters, and access doors and panels must be properly installed to establish actual system operating conditions BEFORE beginning air balancing opera­tions.
Each individual unit and associated ductwork is a unique system with its own operating characteristics. For this reason, air balancing is normally done by bal­ance specialists who are familiar with all procedures required to properly establish air distribution and fan system operating conditions. These procedures should not be attempted by unqualified personnel.
After the proper system operation is established, the actual unit air delivery and the actual fan motor amper­age draw for each unit should be recorded in a conve­nient place for future reference such as the inspection, installation, and start-up check sheet (see SECTION
4 - INSPECTION, INSTALLATION & START-UP CHECKLIST). Contact the Sales Representative or the
factory for additional copies of this sheet.
WATER SYSTEM BALANCING
A complete knowledge of the hydronic system, its components, and controls is essential to proper water system balancing and this procedure should not be at­tempted by unqualified personnel. The system must be complete and all components must be in operating condition BEFORE beginning water system balancing operations. All connections must be checked to ensure they are adequately tightened after shipment; compo­nents may loosen during shipment to job site
Each hydronic system has different operating charac­teristics depending on the devices and controls in the system. The actual balancing technique may vary from one system to another.
After the proper system operation is established, the appropriate system operating conditions such as vari­ous water temperatures and flow rates should be re­corded in a convenient place for future reference such as the inspection, installation, and start-up check sheet
(see SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLIST).
Before and during water system balancing, conditions may exist which can result in noticeable water noise or undesired valve operation due to incorrect system pres­sures. After the entire system is balanced, these condi­tions will not exist on properly designed systems. If unit is ordered with P.T. ports, these should be used to measure the pressure differential across the coil.
CONTROLS OPERATION
Before proper control operation can be verified all other systems must be in proper operation. The correct water and air temperatures must be present for the con­trol function being tested. Some controls and features are designed not to operate under certain conditions.
A wide range of controls and electrical options and accessories may be used with the equipment covered in this manual. Consult the approved unit submittals, order acknowledgement, and other manuals for de­tailed information regarding each individual unit and its controls. Since controls and features may vary from one unit to another, care should be taken to identify the controls to be used on each unit and their proper control sequence. Information provided by component manufacturers regarding installation, operation, and maintenance of their individual controls is available upon request.
Fan coil units, which allow water ow
through the coils while the fan is in the OFF position, can create condensation on the exterior of the cabinet.
24
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
FAN COIL EC MOTOR CONTROL G3 PWM Board
The Enviro-Tec “Generation 3 PWM” (G3 PWM) board provides a pulse-width modulated (PWM) signal to the EC motor to control fan speed. The board is fac­tory programmed to control the motor in either Three Speed (adjustable) mode or Proportional Control us­ing a remote 2 – 10 V DC input signal. In Proportional Control mode, a 2 – 10 V DC signal will control EC motor speed between factory set minimum (Min) and maximum (Max) values. For either control mode, fan on/off control is enabled via the “G” signal.
Tools Needed
• Digital multimeter capable of measuring 30 volts AC/DC and duty cycle
Insulated 1/8” at bladed screwdriver
• Mini Hook Test Clips for multimeter (optional)
2
FIGURE 12 - G3 PWM BOARD
PWM Board Status LED
The G3 PWM Status LED (refer to Figure 12 on page
25) indicates the status of the G3 PWM board. See Table 1 on page 25.
ENVIRO-TEC
TABLE 1 - G3 STATUS LED DEFINITION
FLASH MODE INDICATES
Yes Run Normal
Yes Program Timed out Always On Run Erro Always On Program Program Mode Always Off Any Fault
25
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
G3 PWM Status Descriptions
Normal - (Run mode) - If configuration switch 1 is in Run Mode (OFF) the LED will flash to indicate Nor­mal status.
Timed Out - (Program Mode) - The PWM board has a time out function in Program Mode. If the PWM board has timed out in Program Mode, the LED will flash. Time Out may be cleared by pushing the Reset Button.
Error - (Run Mode) - If configuration switch 1 is in Run mode (OFF) and the LED is always ON, there is a system error. Verify all connections and proper input voltage at Line and Com, then push the Reset Button. If this fails to return the board to Normal mode, replace the board.
Program Mode - If configuration switch 1 is in Pro­gram Mode (ON) the LED will be always ON to indi­cate that the board is in Program Mode. See Figure 2.
While in Program Mode, the fan motor will not run.
Fault - (Any mode) - If the LED remains OFF, the board either has no power or is faulted. Verify proper input voltage at Line and Com, then push the Reset Button. If this fails to return the board to expected mode, replace the board.
LD19221
FIGURE 13 - PROGRAM MODE (CONFIGURATION SWITCH 1 ON)
All power must be disconnected prior to installation and servicing this equipment. More than one source of power may be
4. Press Reset button. Connect a voltmeter to test points TP1 (-) and TP3 (+). Refer to Figure 1. Set voltmeter to DC volts.
present. Disconnect all power sources to avoid electrocution or shock injuries. Refer to lock out tag out procedures.
1. Make sure there are no obstructions in the dis­charge ductwork and/or at the plenum opening.
2. Locate the G3 PWM board in the control enclo­sure. Refer to Figure 1 for location of test points
TP3 and TP1, the Conguration Switch, Speed
Adjust Potentiometer, and Reset Button.
3. Place Conguration Switch into Program Mode.
5. Apply power to the unit. V erify that the status LED is Always On, indicating that the PWM board is in Program Mode. If the status LED blinks while in Program Mode, the board has timed out. In this case, push the reset button and verify the status LED returns to Always On.
Use an insulated screwdriver to ip conguration
switch #1 (closest to speed adjust potentiometer) to the ON position. See Figure 13 on page 26.
LD19220
The PWM board must be in Program Mode to read voltage across TP1 and TP3.
26
ENVIRO-TEC
The PWM board times out in Program
LD19222
2-10V Manual
Max High Medium Low Min
10.0 VDC
7.5 VDC
6.0 VDC
4.0 VDC
2.0 VDC
0.88 VDC
0.70 VDC
0.53 VDC
0.35 VDC
0.18 VDC
Max High
Medium
Low
Min
0
100
200
300
400
500
600
700
Airflow (SCFM)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
ESP (inches w.g.)
HORIZONTAL LOW PROFIL PLENUM SIZE 30 FAN CALIBRATION CURVE:
CONSTANT-RPM EC MOTOR
3 Row, 10 FPI, 1” Throwaway filter
2.0
6.8
5.2
8.4
10.0
2.8 9.2
7.6
6.04.43.6
LD19223
Remote Analog Adjustment Voltage (VDC)
2000
200
400
600
800
1000
1200
1400
1600
1800
0
Airflow (CFM)
0.00
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
2.50
HORIZONTAL LOW PROFILE PLENUM
FAN CALIBRATION CURVE: CONSTANT-CFM EC MOTOR
Manual Adjustment Voltage (VDC)
60
50
40
20
30 25
Mode after approximately 5-6 minutes and will need to be reset by pushing the reset button. If more time is needed to
verify correct airow, perform the STORE
operation (through switch 8) after adjust­ment to save the adjusted fan speed.
6. Determine desired fan operating points. Refer to the Fan Calibration Curve label supplied on the side of the equipment. There are two different styles of Fan Calibration Curve, depending on EC motor type.
The Fan Calibration Curve provided with the unit represents response for a unit
with typical conguration. Actual airow
may vary slightly depending on actual
system conguration.
a. Constant RPM EC Motor. Refer to Figur e 14
on page 27 for sample label. Five curves
are shown, showing factory default airflow for Minimum, Low, Medium, High, and Maximum speeds. A table is provided which shows the expected voltage across test points TP1 and TP3 for each speed, depending on whether the unit is set up for three speed or 2 – 10 VDC motor control.
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
2
FIGURE 14 - CONSTANT RPM AND CONSTANT TORQUE EC MOTORS EXAMPLE FAN CALIBRATION CURVE
b. b. Constant Airflow or Constant Torque EC
Motor. Refer to Figure 15 on page 27 for sample label. Several curves are shown on the label, one for each size unit. Refer to the 0 to 2.5 volt scale on the label and use the voltmeter to read the voltage across TP1 and TP3 to determine desired airflow setting.
Changing the factory setting for minimum and maximum CFMs will invalidate the range for the Fan Calibration Curve as it will narrow the scale of the input signal.
7. Follow instructions for adjusting EC motor speed using the G3 PWM board. Separate instructions are provided for Three Speed (adjustable) and 2 – 10 VDC Proportional motor control modes.
ENVIRO-TEC
FIGURE 15 - CONST ANT AIRFLOW AND CONSTANT TORQUE EC MOTORS EXAMPLE FAN CALIBRATION CURVE
Adjusting EC Motor Speed
This section contains instructions for using the G3 PWM board to adjust the EC motor speed for balanc­ing purposes. There are two modes of EC motor speed control: Three Speed operation at three fixed (adjust­able) speeds, or Proportional Control with remote 2 – 10 VDC signal.
For units with electric heat, fan speed must not be adjusted below 70 CFM/kW .
27
Refer to Figure 12 on page 25 for location of Con­figuration Switch, speed Adjust Potentiometer, and Reset Button. These will be used to program the EC operating mode and motor speed settings.
Three Speed (Adjustable) Motor Control
High, Medium, and/or Low speed adjustment for three speed operation.
Thermostat must be set for three speed operation.
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
1. High Speed Setting Adjust: Set Conguration
Switch to HIGH SPEED adjust (see Figure 16 on page 28). Switches to ON-OFF-ON-OFF-OFF­OFF-OFF-OFF.
• Set switch 1 to ON (Program).
• Set switch 2 to OFF (Fixed Speed).
• Set switch 3 to ON (Hi/Max).
• Set switches 4 through 8 to OFF.
• Press RESET button.
RESET button only needs to be pressed once per programming session unless board times out. Refer to Status LED.
• Refer to voltmeter connected to TP1 and TP3. Using an insulated 1/8” flat bladed screwdriver, adjust speed potentiometer to desired high speed airflow per Fan Calibra­tion Curve on unit.
FIGURE 16 - HIGH SPEED ADJUST
2. Medium speed Adjust: Set Conguration Switch
to MEDIUM SPEED adjust (see Figure 17 on page 28). Switches to ON-OFF-OFF-ON-OFF­OFF-OFF-OFF.
• Set switch 1 to ON (Program).
• Set switches 2 -3 to OFF.
• Set switch 4 to ON (Med).
• Set switches 5 through 8 to OFF.
• Refer to voltmeter connected to TP1 and TP3. Using an insulated 1/8” flat bladed screwdriver, adjust speed potentiometer to desired high speed airflow per Fan Calibra­tion Curve on unit.
STORE: Set switch 8 to Store (ON), wait one second, then to Set (OFF), to save the value.
28
STORE: Set switch 8 to Store (ON), wait
one second, then to Set (OFF), to save the value.
FIGURE 17 - MEDIUM SPEED ADJUST
ENVIRO-TEC
3. Low Speed Adjust: Set Conguration Switch
to LOW SPEED adjust (see Figure 18 on page
29). Switches to ON-OFF-OFF-OFF-ON-OFF­OFF-OFF
• Set switch 1 to ON (Program).
• Set switches 2 -4 to OFF.
• Set switch 5 to ON (Lo/Min).
• Set switches 6 through 8 to OFF.
• Refer to voltmeter connected to TP1 and TP3. Using an insulated 1/8” flat bladed screwdriver, adjust speed potentiometer to desired high speed airflow per Fan Calibra­tion Curve on unit.
STORE: Set switch 8 to Store (ON), wait one second, then to Set (OFF), to save the value.
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
2
FIGURE 19 - NORMAL THREE SPEED OPERATION
2 – 10 VDC PROPORTIONAL MOTOR CONTROL
FIGURE 18 - LOW SPEED ADJUST
4. Resume Normal Three Speed Operation: Set
all switches to OFF to resume normal three speed operation. Refer to Figure 19 on page 29.
Speed range adjustment for Proportional Control op­eration. Minimum (Min) and maximum (Max) speeds are programmed at the factory for optimum opera­tion. Changing factory Min or Max speed defaults will change the motor effective speed range and invalidate the voltage settings shown on the Fan Calibration Curve. However, the speed range may still be adjusted as long as the Min speed remains greater than 70 CFM/ kW for units with electric heat.
Thermostat must be set for either analog or single (high) speed operation.
1. Connections: Connect or verify connection of
remote analog signal and common wires to 2-10 VDC Remote Control Input terminals (refer to Figure 12 on page 25).
2. Set Mode to 2 – 10 VDC Proportional Con- trol: Set conguration switches to 2 – 10 ANA- LOG programming mode (see Figure 20 on page
30). Switches to ON-ON-OFF-OFF-OFF-ON­OFF-OFF.
ENVIRO-TEC
• Set switch 1 to ON (Program).
• Set switch 2 to ON (Analog).
• Set switches 3 – 5 to OFF.
• Set switch 6 to ON (2-10 V).
29
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
• Set switches 7 and 8 to OFF.
• Press RESET button.
RESET button only needs to be pressed once per programming session unless board times out. Refer to Status LED.
STORE: Set switch 8 to Store (ON), wait
one second, then to Set (OFF), to save the value.
3. Max Speed Adjust: Set conguration switches
to HI/MAX SPEED balancing mode (see Figure 21 on page 30). Switches to ON-ON-ON-OFF­OFF-ON-OFF-OFF.
• Set switch 1 to ON (Program).
• Set switch 2 to ON (Analog).
• Set switch 3 to ON (Hi/Max).
• Set switches 4 and 5 to OFF.
• Set switch 6 to ON (2-10 V).
• Set switches 7 and 8 to OFF.
• Refer to voltmeter connected to TP1 and TP3. Using an insulated 1/8” flat bladed screwdriver, adjust speed potentiometer to desired Max speed airflow.
STORE: Set switch 8 to Store (ON), wait one second, then to Set (OFF), to save the value.
FIGURE 20 - MODE TO 2–10 VDC PROPORTIONAL CONTROL
If adjusting Min/Max CFM values, con­tinue to step 3. Otherwise, skip to step 5.
FIGURE 21 - MAX SPEED ADJUST
30
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
4. Min Speed Adjust: Set conguration switches to
LO/MIN SPEED balancing mode (see Figure 22 on page 31). Switches to ON-ON-OFF-OFF­ON-ON-OFF-OFF.
• Set switch 1 to ON (Program).
• Set switch 2 to ON (Analog).
• Set switches 3 and 4 to OFF.
• Set switch 5 to ON (Lo/min).
• Set switch 6 to ON (2-10 V).
• Set switches 7 and 8 to OFF.
• Refer to voltmeter connected to TP1 and TP3. Using an insulated 1/8” flat bladed screwdriver, adjust speed potentiometer to desired Min speed airflow.
STORE: Set switch 8 to Store (ON), wait one second, then to Set (OFF), to save the value.
5. Resume Normal 2 – 10 V DC Proportional
Control: Set conguration switches to OFF-ON-
OFF-OFF-OFF-ON-OFF-OFF for normal pro­portional speed control, as shown in Figure 23 on page 31.
• Set switch 2 to ON (Analog).
• Set switch 6 to ON (2 – 10).
• Set all other switches to OFF.
2
FIGURE 22 - MIN SPEED ADJUST
FIGURE 23 - NORMAL 2 – 10 VDC SPEED
CONTROL
ENVIRO-TEC
31
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
EC MOTOR TROUBLESHOOTING GUIDELINES
Ensure motors and blowers are clean as part of normal maintenance. No further maintenance is required for these motors.
TABLE 2 - EC MOTOR TROUBLESHOOTING GUIDELINES
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
No or loose enable jumper (constant RPM motor only)
No power to motor. Possible blown fuse or open circuit breaker
PWM conguration switch in program
mode
PWM board faulted
No control signal (constant RPM)
Motor fails to start
Improper wiring connections
EC motor wiring harness improperly seated
EC motor wiring harness(es) open or intermittent
Blower jammed
No 24 VAC power Float switch tripped Verify oat switch (if present) is made.
Motor seized
Damaged motor cable Cable is integral to motor, replace motor.
Follow standard lock out tag out (LOTO) procedures when performing service on motor or blower.
Verify enable jumper connected properly to motor driver. Refer to Constant RPM
EC Motor Driver Enable Jumper on page
37.
Verify line voltage at motor driver. Replace fuse or reset circuit breaker.
Conguration switch 1 must be in Run
mode (Figure 13 on page 26). Refer also to PWM Board Status LED on page
25. Refer to PWM Board Status LED on page
25. Verify voltage input, wiring and connections. Push reset button. Replace PWM board if fault returns.
Constant RPM EC motors will not rotate if they lose PWM signal while enabled. Verify PWM signal at motor connector by connecting a multimeter set for “duty cycle” between pins 1P1 and 1C (or between pins 2P1 and 2C). The duty cycle represents the on-time percentage signal sent to the motor (this number will vary between the minimum and maximum duty cycle set by the factory). See Figure 12 on page 25 for PWM board connections. Refer also to PWM Board Status LED on page 25 to verify board is in normal operating mode.
Verify wiring. If Fan Coil Relay board present, verify all jumpers installed. Refer to Fan Coil Relay Board Troubleshooting Guide.
Unplug harness and re-install, making sure plugs are fully seated.
Replace harness(es). See section on
Checking EC Wire Harnesses on page
35.
Clear blockage. Verify blower rotates freely with motor disconnected.
Refer to Fan Coil Relay Board Troubleshooting Guide.
Verify motor rotates freely by hand with blower disconnected. If not, replace motor.
32
ENVIRO-TEC
TABLE 2 - EC MOTOR TROUBLESHOOTING GUIDELINES (CONT'D)
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Fan speed adjustment outside operating range
Motor surges
Poor performance
Motor starts but stops
Blower Screw loose Tighten Screw onto motor shaft.
ESP (external static pressure) too high
Lack of required external static
pressure
Speed adjustment outside fan operating range
Erratic speed command (in Proportional Control mode)
Damaged or blocked blower
Voltage or ground loss at motor driver
Motor overloaded - blower binding
Motor overloaded
Open ductwork for concealed units Verify ducts sealed properly.
Motor overheated due to lack of
airow
PWM board error or faulted
Motor driver failure
Damaged motor cable Cable is integral to motor, replace motor.
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
Refer to Fan Calibration curve on unit. Adjust speed on PWM Controller to value that will allow motor to start. See instructions for Adjusting EC Motor Speed on page 27.
Verify dampers, if present, are not closed. Verify there are no obstructions in the discharge ductwork and/or at the plenum
opening. Verify lter is not dirty and does not obstruct airow.
Add required external static pressure.
Refer to Fan Calibration curve on unit. Adjust speed on PWM Controller to value that will allow motor to start. See instructions for Adjusting EC Motor Speed on page 27.
Verify 2-10V analog signal at Remote Control Input terminals.
Verify blower rotates freely. Clear blockage.
Verify proper voltage and ground at motor driver power terminals. Refer to Motor Driver Connections for the EC motor.
Clear blockage. Verify blower rotates freely with motor disconnected.
Use amp meter to verify motor amps. Verify motor rotates freely with power disconnected. If not, replace motor.
Verify dampers, if present, are not closed. Verify there are no obstructions in the discharge ductwork and/or at the plenum
opening. Verify lter is not dirty and does not obstruct airow.
Refer to PWM Board Status LED on page
25. Verify all connections. Push reset
button. Replace board if fault returns.
Replace motor (Constant airow or constant torque motors.) Replace driver
(Constant RPM motor.)
2
ENVIRO-TEC
33
TABLE 2 - EC MOTOR TROUBLESHOOTING GUIDELINES (CONT'D)
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
PWM board error or faulted
Improper wiring connections
EC wiring harness damaged or improperly seated
Motor speed cannot be adjusted
Motor runs in reverse, does not respond
to speed adjustment
Excessive motor noise
Motor runs in G3 PWM Program mode
but not in Run mode
No control signal (constant airow and constant torque)
ESP (external static pressure) too high
Motor driver failure
Motor driver failure
Motor mounting bolts loose Tighten motor mounting bolts. Motor bearing Replace motor.
Motor overloaded
Fan wheel rubbing on fan housing Align wheel in housing. Loose fan wheel Align and tighten.
Loose pin in Fixed Speed Conn. harness
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
Refer to PWM Board Status LED on page
25. Verify all connections. Push reset button. Replace board if fault returns.
Verify wiring. If Fan Coil Relay board present, verify all jumpers installed.
Unplug harness and re-install, making sure plugs are fully seated. See section on Checking EC Wire Harnesses on page
35. Replace harness if damaged.
Constant airow and constant torque EC
motors will run at idle speed if they lose PWM signal while enabled.
Verify PWM signal at motor connector by connecting a multimeter set for “duty cycle” between pins 1P1 and 1C (or between pins 2P1 and 2C). The duty cycle represents the on-time percentage signal sent to the motor (this number will vary between the minimum and maximum duty cycle set by the factory). See Figure 12 on page 25 for PWM board connections. Refer also to PWM Board Status LED on page 25 to verify board is in normal operating mode.
Verify dampers, if present, are not closed. Verify there are no obstructions in the discharge ductwork and/or at the plenum
opening. Verify lter is not dirty and does not obstruct airow.
Replace motor (constant airow or constant torque motors)
Replace driver (constant RPM motors)
Replace motor (constant airow or constant torque motors)
Replace driver (constant RPM motors)
Use amp meter to verify motor amps. Verify motor rotates freely with power disconnected. If not, replace motor. Verify static pressure within limits shown on Fan Calibration Curve on unit.
Verify that the pins in the Fixed Speed Conn. harness (see location in Figure 12 on page 25) are inserted fully.
34
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
CHECKING EC WIRE HARNESSES
Use ohmmeter to verify that motor ground wire has continuity from motor case to ground.
To check signal wire harnesses:
• Remove power from the unit. Unplug signal har­ness at EC driver and from motor connector at PWM board.
• Use ohmmeter to check continuity for each con­ductor, then reconnect harnesses to driver and to PWM board.
To check power wire harness:
• Refer to wiring diagram.
• Remove power from the unit. Unplug power har­ness at EC driver.
• Verify green wire has continuity to ground.
• Unplug power wires from connections in electri­cal enclosure. Verify continuity of wires to motor driver, then reconnect to same terminals.
EC MOTOR AND DRIVER
There are two types of EC motor:
• Constant RPM EC motor, both single and double shaft.
Constant Airow or Constant Torque EC motor, both single and double shaft.
Constant Airflow/Constant Torque EC Motors
LD19307
FIGURE 24 - CONSTANT CFM/CONSTANT TORQUE EC MOTORS (1/3 HP SHOWN)
2
Before reconnecting power to unit, verify all harnesses are connected per diagram.
Use light force when inserting meter probe into plug. Excess force will damage contacts.
LD19309
FIGURE 25 - CONSTANT CFM/CONSTANT TORQUE EC MOTOR DRIVER
ENVIRO-TEC
35
LD19310
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
Constant RPM EC Motors
TABLE 3 - SIGNAL CONNECTOR
PIN DESCRIPTION
1 C1 (n/u - com) 2 W/W1 (n/u) 3 C2 (PWM COM) 4 DELAY (n/u) 5 COOL (n/u) 6 Y1 (n/u) 7 ADJUST (n/u) 8 OUT - (PWM FB)
9 O (n/u) 10 PWM 11 HEAT (n/u) 12 R (n/u) 13 EM/W2 (n/u) 14 Y/Y2 (n/u) 15 G (Fan Enable) 16 OUT + (PWM FB)
NOTE: Connections marked (n/u) are not used.
TABLE 4 - POWER CONNECTOR
PIN DESCRIPTION
1 Jumper pin 1 to pin 2 for 120 VAC Line 2 3 Chassis Ground 4 AC Line (Line 1) 5 AC Line (Line 2, Neutral)
Input only
LD19311
LD19312
FIGURE 26 - CONSTANT RPM EC MOTOR (1/4 HP SHOWN)
LD19313
FIGURE 27 - CONSTANT RPM EC MOTOR DRIVER
LD19314
TABLE 5 - CON1, POWER INPUT
PIN DESCRIPTION
1 Ground 2 Neutral (or Line 2) 3 Line 1
TABLE 6 - CON502 (IF PRESENT), PROGRAM­MING CONNECTOR
PIN DESCRIPTION
1 +15V 2 Ground 3 TX­4 TX+
36
TABLE 7 - CON302, PWM SIGNAL INPUT
PIN DESCRIPTION
4 Speed Control Input (H) 3 Speed Control Input (L) 2 Speed Control Input (H) 1 Speed Control Input (L)
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
TABLE 8 - CON503 (IF PRESENT), MOTOR EN­ABLE INPUT
PIN DESCRIPTION
1 No Connection 2 Signal Input 3 Ground
TABLE 9 - CON202, FEEDBACK FROM EC MOTOR HALL SENSOR
PIN DESCRIPTION
1 +5V 2 Ground 3 Hall "W" 4 Hall "V" 5 Hall "U"
TABLE 10 - CON201, OUTPUT POWER TO MOTOR
PIN DESCRIPTION
1 W1 2 NC 3 V1 4 U1
Constant RPM EC Motor Driver Enable Jumper
The ETI Constant RPM EC motor driver has a Mo­tor Enable Input. These drivers require a jumper across the Enable Connector to allow the unit to operate. See Figure 10 for jumper location across pins 2 and 3 of the Enable Connector.
LD19308
FIGURE 28 - CONSTANT RPM EC DRIVER EC MOTOR ENABLE CONNECTOR
2
ENVIRO-TEC
37
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
ECM 3-SPEED CONSTANT TORQUE MOTOR TROUBLESHOOTING GUIDE
TABLE 11 - ECM CONSTANT TORQUE MOTOR SPECIFIC TROUBLESHOOTING GUIDELINES
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Verify the thermostat, if supplied, is operating
HVAC system not calling for operation
Signal voltage at FRCB out of range
Motor voltage not present
Motor Fails to Start
Wiring harness improperly connected
Loose wires in wiring harness
Wiring harness is defective or damaged
Mechanical failure of motor
Motor Surges ESP (external static pressure) too high
Motor mount loose
Excessive Motor Noise
Poor Performance
Motor runs in reverse or not
responding to speed adjustment
* - Fan Coil Relay Board ** - Verify wiring harnesses have no loose wires by gently pulling on each wire.
Fan wheel loose or rubbing on fan housing
Lack of required ESP
Wrong motor program Contact factory. Motor failure
properly and/or the applicable thermostat is connected to your unit.
Verify FCRB* jumper is connected from ‘24VAC’ – ‘R’ terminal to ‘MTR PWR’ terminal. Measure signal voltage from FCRB ‘24VAC’ – ‘COM’ terminal to each of ‘TO FAN MTR’ ‘HIGH’, ‘MED’, and ‘LOW’ terminals. Verify voltages range from 12 to 33VAC. If any voltage is out of range, replace the FCRB.
Verify the motor line voltage (black harness wire) is connected to the applicable ‘LINE VOLTAGE IN’ terminal on the FCRB. Measure voltage from the applicable ‘LINE VOLTAGE IN’ terminal to the ‘P1’ terminal on the FCRB. Verify the applicable voltage is present. If no voltage is present, verify voltage at the line.
With power removed from the unit, verify that connectors at motor, panel, and FCRB seat correctly. If not, reconnect them.
With power removed from the unit, verify that none of the wiring harnesses have loose wires.**
With power removed from the unit and the wiring harnesses disconnected, verify continuity of harness from FCRB and from
equipment ground to motor connector.
Replace wiring harness if suspect. Refer to
ECM Constant Torque Motor Specications
on page 40
Remove power from the unit. Replace the motor.
Verify there are no discharge obstructions
and the coil ns are clean. Verify plenum is unobstructed. Verify the lter is clean and does not obstruct ow of plenum air. Verify
that the High Static Option plug (red) is connected if static is high.
With power removed from the unit, tighten motor mounting bolts.
With power removed from unit, loosen fan wheel, align wheel in housing, then retighten.
Adjust system to provide required static
pressure. (See fan curve.)
Remove power from the unit. Replace motor.
38
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
Procedure for Checking ECM Constant Torque Wiring Harnesses
1. Remove power from the unit. Lock and tag out power source.
2. Verify that equipment is properly grounded.
3. Unplug ECM Motor Power wiring harness, and use ohmmeter to verify continuity (see Table 12 on page 39 for details.)
4. Verify continuity from green wire (motor ground) to equipment ground.
5. Unplug ECM Motor Signal wiring harness, and use ohmmeter to verify continuity (see Table 13 on page 40 for details.)
6. Replace all connections. Ensure good connections are made.
Only very light force is required when inserting meter probe into plug. Excess force will damage contacts.
2
ECM Constant Torque Motor Connections
The ECM Constant Torque motor connector is located on the side of the motor. It has two rows of terminals, as shown in Figure 29 on page 39. The Power (4­pin) connector plugs into the top row. The Signal (5­pin) connector plugs into the bottom row.
FIGURE 29 - MOTOR POWER AND SIGNAL CONNECTORS
TABLE 12 - THE ECM CONSTANT TORQUE MOTOR POWER WIRING HARNESS
WIRE COLOR FUNCTION
Purple Signal Common C 24 VAC - COM
Black Line Voltage L
Green Ground G N/A - Ground
White Neutral N P1 - L2/Neut
ENVIRO-TEC
MOTOR
CONNECTION
FCRB CONNECTION
Line Voltage In - see
equipment
39
FORM ET115.24-NOM4 (819)SECTION 2 - START-UP
TABLE 13 - THE STANDARD ECM CONSTANT TORQUE MOTOR SIGNAL WIRING HARNESS (WHITE PLUG)
WIRE COLOR FUNCTION
Yellow
Red
Black
Standard Option Low
Speed
Standard Option
Medium Speed
Standard Option High
Speed
MOTOR
CONNECTION
1
3
4
FCRB CONNECTION
TO FAN MOTOR -
LOW
TO FAN MOTOR -
MED
TO FAN MOTOR -
HIGH
TABLE 14 - THE HIGH STATIC ECM CONSTANT TORQUE MOTOR SIGNAL WIRING HARNESS (RED PLUG)
WIRE COLOR FUNCTION
Orange
Gray
Blue
High Static Option Low
Speed
High Static Option
Medium Speed
High Static Option
High Speed
MOTOR
CONNECTION
2
4
5
FCRB CONNECTION
TO FAN MOTOR -
LOW
TO FAN MOTOR -
MED
TO FAN MOTOR -
HIGH
ECM Constant Torque Motor Specifications
TABLE 15 - ECM CONSTANT TORQUE MOTOR PART NUMBERS
TYPE POWER PART # VOLTAGE
ECM 3 SPD 1/3 HP PM-02-0425 277 ECM 3 SPD 1/3 HP PM-02-0426 115 ECM 3 SPD 1/3 HP PM-02-0427 208/230
TABLE 16 - MOTOR SIGNAL TAP SPECIFICATIONS
Min ‘On’ voltage greater than 12VAC or 15VDC
Maximum voltage 33VAC or 23VDC
Min ‘Off’ voltage less than 5.5VAC or 8VDC
Minimum frequency 47 Hz
Nominal frequency 50 or 60 Hz
Maximum frequency 126 Hz
Min current draw 2 m
Nominal current draw 6 mA
Maximum current draw 12 mA
TABLE 17 - GENERAL ECM CONSTANT TORQUE MOTOR SPECIFICATIONS
MAX RATINGS @ NOM V, 1050 RPM
HP
MOTOR+CONTROL
WEIGHT (LBS)
END TO END
LENGTH
TORQUE
(OZ-FT)
WATTS IN
(45C)
WATTS IN
(55C)
40
1/3 9.2 5.275” 27 350 350
ENVIRO-TEC
SECTION 2 - START-UPFORM ET115.24-NOM4 (819)
THIS PAGE INTENTIONALLY LEFT BLANK
ENVIRO-TEC
41
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE
SHIELD
BLOWER
OPTIONAL
TYP
(4) PLCS
TYP
(2) PLCS
GENERAL
Each unit on a job will have its own unique operating environment and conditions that may dictate mainte­nance schedule for that unit that is different form other equipment on the job. A formal schedule of regular maintenance and an individual unit log should be es­tablished and maintained. This will help to achieve the maximum performance and service life of each unit on the job.
Information regarding safety precautions contained in the preface at the beginning of this manual should be followed during any service and maintenance opera­tions.
For more detailed information concerning service op­erations, consult your Sales Representative or the Fac­tory.
MOTOR/BLOWER ASSEMBLY
The type of fan operation is determined by the control components and their method of wiring, and may vary from unit to unit. Refer to the wiring diagram for each unit for that unit’s individual operating characteristics. All motors have internal automatic reset thermal over­loads.
Should the assembly require more extensive service, the motor/blower assembly may be removed from the unit to facilitate such operations as motor or blower wheel/housing replacement, etc. The motor/ blower as­sembly is supplied on a slide-out rail system (see Fig- ure 30 on page 42). To remove, loosen the two lock nuts at the rack front and slide the blower assembly out. Disconnect the motor electrical plug to fully remove the assembly from the unit. To reinstall the blower, re­peat the removal sequence in reverse order. The rear of the blower must catch on the support bracket supplied.
Dirt and dust should not be allowed to accumulate on the blower wheel or housing. This can result in an un­balanced blower wheel condition that can damage a blower wheel or motor. The wheel and housing may be cleaned periodically using a vacuum cleaner and a brush taking care not to dislodge the factory balancing weights on the blower wheel blades.
FORM ET115.24-NOM4 (819)SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE
LD13879
FIGURE 30 - MOTOR/BLOWER ASSEMBL Y
COIL
Coils may be cleaned by brushing the entering air face between fins with a soft brush. Brushing should be followed by cleaning with a vacuum cleaner. If a compressed air source is available, the coil may also be cleaned by blowing air through the coil fins from the leaving air face. Vacuuming should again follow this procedure. Units provided with the proper type of air filters, replaced regularly, will still require periodic coil cleaning.
ELECTRIC RESISTANCE HEATER ASSEMBLY
Electric resistance heaters typically require no normal periodic maintenance when unit air filters are changed properly . The two most important operating conditions for an electric heater are proper airflow and proper sup­ply voltage. High supply voltage and/or poorly distrib­uted or insufficient airflow over the element will result in element overheating. This condition may result in the heater cycling on the high limit thermal cutout. Open coil strip heaters have an automatic reset switch with a back-up high limit thermal switch. Automatic reset switches are as the name implies; they reset automati­cally after the heater has cooled sufficiently . High limit thermal switches must be replaced once the circuit has been broken. The high limit thermal cutout device is a safety device only and is not intended for continuous operation. With proper unit application and operation, the high limit thermal cutout will not deactivate the heater. This device only operates when some problem exists and ANY condition that causes high limit cutout
42
ENVIRO-TEC
MUST be corrected immediately. High supply voltage
TYP
(6) PLCS
also causes excessive amperage draw and may result in tripping of the circuit breaker or blowing of the fuses on the incoming power supply.
Window treatments and drapes must not be positioned in a manner which obstructs the air ow through the return air or dis­charge grilles.
After proper air flow and supply power are assured, regular filter maintenance is important to provide clean air over the heater. Dirt that is allowed to deposit on the heating element will cause hot spots and eventual ele­ment burn-through. These hot spots will normally not be enough to trip the thermal high limit and may not be evident until actual heater element failure. Heaters may be serviced through the unit’s electrical section (see Figure 31 on page 43). To remove heater, dis­connect unit power, remove heater connecting wiring and the element mounting screws.
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCEFORM ET115.24-NOM4 (819)
3
ELECTRICAL WIRING & CONTROLS
The electrical operation of each unit is determined by the components and wiring of the unit and may vary from unit to unit. Consult the wiring diagram for the actual type and number of controls provided on each unit.
The integrity of all electrical connections should be verified at least twice during the first year of operation. Afterwards, all controls should be inspected regularly for proper operation. Some components may experi­ence erratic operation or failure due to age. Wall ther­mostats may also become clogged with dust and lint and should be periodically inspected and cleaned to provide reliable operation.
When replacing any components such as fuses, contactors, or relays, use only the exact type, size, and voltage component as furnished from the factory. Any deviation without factory authorization could result in personnel injury or damage to the unit and will void all factory warranties. All repair work should be done in such a manner as to maintain the equipment in compli­ance with governing codes and ordinances or testing agency listings. More specific information regarding the use and operating characteristics of the standard controls offered by this manufacturer is contained in other manuals.
LD13878
FIGURE 31 - ELECTRIC HEAT
VALVES & PIPING
With the exception of strainers, no formal maintenance is required on the valve package components most commonly used with fan coil units. During normal pe­riodic maintenance, the valve packages may be visu­ally inspected for possible leaks.
Valve packages with strainers should have the strainers cleaned after startup. The strainers may require clean­ing several times immediately after startup until the system is thoroughly cleaned and stabilized. After that, a schedule should be determined for regular inspection of the strainers.
In the event that a valve or component should need re­placement, the same precautions taken during the ini­tial installation to protect the components from exces­sive heat should observed during replacement.
ENVIRO-TEC
43
FILTERS, THROWAWAY
The type of throwaway filter most commonly used on fan coil units should be replaced on a regular basis. The time interval between each replacement should be established based on regular inspection of the filter and should be recorded in the log for each unit. Refer to the product catalog for the recommended filter size for each product type and size. If the replacement fil­ters are not purchased from the factory, the filters used should be the same type and size as that furnished from or recommended by the factory . Consult the factory for applications using filter types other than the factory standard or optional product. Dirty filters are the cause of the most common system performance complaints. It is essential that filters be serviced on a regular basis.
DRAIN
The drain should be checked before initial start-up and at the beginning of each cooling season to assure that the drain trap and line are clear. If it is clogged, steps should be taken to clear the debris so that condensate will flow easily.
Periodic checks of the drain should be made during the cooling season to maintain a free flowing conden­sate. Should the growth of algae and/or bacteria be a concern, consult an air conditioning and refrigeration supply organization familiar with local conditions for chemicals available to control these agents. The drain trap is a flexible rubber hose. It is secured to the drain pan and riser with clamps and is easily removable for service.
OPTIONAL REMOVABLE DRAIN PAN
FORM ET115.24-NOM4 (819)SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE
LD13880
FIGURE 32 - DRAIN PAN REMOVAL
REPLACEMENT PARTS
Factory replacement parts should be used wherever possible to maintain the unit performance and operat­ing characteristics and the testing agency listings. Re­placement parts may be purchased through the local Sales Representative.
Contact the local Sales Representative or the factory before attempting any unit modifications. Any modi­fications not authorized by the factory could result in personnel injury and damage to the unit and could void all factory warranties.
When ordering parts, the following information must be supplied to ensure proper part identification:
1. Complete unit model number.
2. Unit hand connection (right or left hand) while facing into the air stream.
An optional removable drain pan is available for easy service and cleaning (see Figure 32 on page 44). To remove the pan, disconnect the drain p-trap by loosen­ing the hose clamp under the pan. Remove the retainer plate at the front of the pan and slide the pan out of its track. Clean or service pan as appropriate. Rein­stall pan in reverse sequence. Retainer plate must be installed for proper operation.
44
3. Complete part description including any numbers.
On warranty replacements, in addition to the infor­mation previously listed, the Factory Order Number (CO#) that appears on the unit nameplate, is required. Contact the factory for authorization to return any parts such as defective parts replaced in warranty. All ship­ments returned to the factory MUST be marked with a Return Authorization Number, which is provided by the factory.
All equipment and components sold through the Parts Department are warranted under the same conditions as the standard manufacturers’ warranty with the ex­ception that the warranty period is 12 months unless the component is furnished as warranty replacement. Parts furnished as warranty replacements are warranted for the remaining term of the original unit warranties.
ENVIRO-TEC
SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCEFORM ET115.24-NOM4 (819)
THIS PAGE INTENTIONALLY LEFT BLANK
ENVIRO-TEC
45
FORM ET115.24-NOM4 (819)SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLIST
SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLIST
RECEIVING & INSPECTION DATE: BY:
Unit Received Undamaged Unit Received Complete As Ordered Unit Arrangement Correct Unit Structural Support Complete & Correct
HANDLING & INSTALLATION
Unit Mounted Level & Square Proper Access Provided For Unit & Accessories
 Proper Electrical Service Provided Proper Overcurrent Protection Provided Proper Service Switch/Disconnect Provided Proper Chilled Water Line Size To Unit Proper Hot Water Line To Unit All Services To Unit In Code Compliance All Shipping Screws & Braces Removed
__________ _________ __________ _________ __________ __________ __________ _________
__________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________
COOLING/HEATING CONNECTIONS
Protect Valve Package Components From Heat Mount Valve Packages Connect Field Piping To Unit Pressure Test All Piping For Leaks
Install Drain Line & Traps As Required
Insulate All Piping As Required
DUCTWORK CONNECTIONS
Install Ductwork, Fittings & Grilles As Required Proper Supply & Return Grille Type & Size Used Control Outside Air For Freeze Protection
Insulate All Ductwork As Required
ELECTRICAL CONNECTIONS
Refer To Unit Wiring Diagram Connect Incoming Power Service or Services Electrical Service of Correct Voltage and Ampacityto
Support Unit Operating Loads
All Field Wiring Installed With Code Compliance Check All Wiring For Secure Connections
__________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________
__________ _________ __________ _________ __________ _________ __________ _________
__________ _________ __________ _________
__________ _________
__________ _________ __________ _________
46
ENVIRO-TEC
SECTION 4 - INSPECTION, INSTALLATION & START-UP CHECKLISTFORM ET115.24-NOM4 (819)
UNIT START-UP DATE: BY:
General Visual Unit & System Inspection Record Electrical Supply Voltage Record Ambient T emperature Close All Unit Isolation Valves Flush Water Systems Fill Systems With Water/Refrigerant
Vent Water Systems As Required All Ductwork & Grilles In Place All Unit Panels & Filters In Place Start Fans, Etc. Check For Overload Condition Of All Units Check All Ductwork & Units For Air Leaks
Balance Air Systems As Required Record All Final Settings For Future Use Check Piping & Ductwork For Vibration Check All Dampers For Proper Operation Verify Proper Cooling Operation Verify Proper Heating Operation Reinstall All Covers & Access Panels
__________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________ __________ _________
4
SERVICE INTERVALS (record dates service performed):
Filters: ______________________________________________________________________________________________ Drain Pan:___________________________________________________________________________________________ Motor/Blower: _________________________________________________________________________________________ Coil: _______________________________________________________________________________________________ Controls:____________________________________________________________________________________________ General: ____________________________________________________________________________________________
ENVIRO-TEC
47
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
NO UNIT OPERATION
UNIT BLOWS MAIN UNIT OR
FAN MOTOR FUSE WHEN
POWER IS APPLIED TO UNIT
FAN DOES NOT RUN WITH
POWER TO UNIT
SECTION 5 - TROUBLESHOOTING
No power to unit. Apply proper power to unit. Improper power to unit. Power distribution panel
switch or circuit breaker in “OFF” position.
Unit toggle or door interlock disconnect switch in “OFF” position.
Fan switch or thermostat system switch in “OFF” position.
Blown or defective unit main fuse, if furnished.
Blown or defective fan motor fuse, if furnished.
Defective toggle, door interlock, fan, or thermostat system switch.
Loose or improper wiring from power distribution and/ or remote mounted control devices.
Defective or improperly wired component.
Fan switch in “OFF” position. Turn fan switch to “ON” position. Thermostat system switch in
“OFF” position. Remote “start/stop” switch in
“OFF” position. Loose or improper wiring from
fan switch or thermostat to unit.
Loose or improper wiring from remote “start/stop” switch to unit “start/stop” relay.
Defective fan switch.
Defective “start/stop” relay.
Defective fan motor.
Apply proper power to unit and check for damaged components and/or blown fuses, if furnished.
Turn power distribution panel switch or circuit breaker to “ON” position.
Turn unit toggle or door interlock disconnect switch to “ON” position.
Turn fan switch or thermostat system switch to “ON” position.
Check for possible defective component or improper wiring, and replace fuse.
Check for possible defective component or improper wiring, and replace fuse.
Momentarily jumper suspected component to simulate closed contacts and achieve unit operation. Replace defective device with known good part.
Verify all wiring connections and terminations, and verify proper wiring of all incoming power devices and remote mounted controls.
Using a battery powered continuity tester, check for shorted or grounded components starting at incoming power. Note position of all controls during various component checks. Caution: some voltages have isolated common which may not show a short to chassis ground. Be sure to isolate each control to eliminate faulty reading through a parallel wired component.
Turn thermostat system switch to “ON” position.
Turn remote “start/stop” switch to “ON” position.
Verify all wiring connections and terminations, and verify proper wiring of all control devices.
Verify all wiring connections and terminations, and verify proper wiring of remote “start/stop” switch.
Momentarily jumper fan switch to each fan speed wire to simulate proper fan switch operation. Replace defective fan switch.
Momentarily jumper “start/stop” relay to simulate proper relay operation. Replace defective “start/stop” relay.
Verify proper fan switch operation and replace defective fan motor.
FORM ET115.24-NOM4 (819)SECTION 5 - TROUBLESHOOTING
48
ENVIRO-TEC
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
FAN MOTOR HUMS AND/OR
GETS HOT, BUT RUNS AT
REDUCED SPEED OR
NOT A T ALL
FAN RUNS BUT VIBRATES
FAN RUNS BUT BLOWER
WHEEL RUBS HOUSING
FAN RUNS BUT AIR
DELIVERY IS LOW
FAN RUNS BUT NO COOLING/
HEATING. (HYDRONIC UNITS)
SECTION 5 - TROUBLESHOOTINGFORM ET115.24-NOM4 (819)
Improper power applied to unit.
Defective motor capacitor. Replace with known good capacitor. Defective fan motor. Replace defective motor. Blower wheel jammed in
housing. Foreign object in blower
wheel. Blower wheel dirty. Blower wheel bent. Replace blower wheel.
Blower wheel out of balance. Replace blower wheel. Foreign object in blower
wheel.
Loose motor mount screws.
Broken motor mount frame or mounting screws.
Bent blower wheel. Replace blower wheel. Blower wheel not positioned
properly on motor shaft. Incorrect fan speed has been
selected.
Dirty air lter. Replace air lter.
Dirty coil. Clean coil. Obstruction in ductwork. Actual E.S.P. higher than
design.
No chilled/hot water ow in
system. Unit isolation valves closed. Open unit isolation valves. Debris in water piping
blocking ow.
Plugged strainer on units so
equipped.
Riser or main ushing loop
open. Loose or improper wiring from
thermostat to control valve. Defective thermostat. Defective control valve
actuator.
Improper aquastat operation on units so equipped.
Apply proper power to unit.
Reposition blower wheel for proper alignment in housing, or replace if damaged.
Remove foreign object and replace blower wheel if damaged.
Remove and clean blower wheel taking care not to remove or reposition balance weights.
Remove foreign object and replace blower wheel if damaged.
Verify proper motor and blower wheel position and tighten motor mount screws. Do not crush mounting grommets.
Replace motor or mounting screws.
Check for damage to blower wheel. Reposition blower
wheel on motor shaft or replace as required.
Reselect proper fan speed as required.
Check for improperly positioned balancing or re dampers. Check for fallen duct liner. Repair as required.
Check installation for proper supply and/or return grilles,
and compliance with plans and specications.
Establish chilled/hot water ow in system as required.
Locate and clear debris from water piping as required.
Clean or remove strainer screen as required.
Close ushing loop valve as required.
Verify all wiring connections and terminations, and verify proper wiring of thermostat.
Momentarily jumper thermostat contacts to simulate
proper operation. Replace thermostat as required.
Manually place control valve in “open” position using
lever on actuator housing. Replace actuator as required.
Verify proper aquastat position and operation. Replace as required.
5
ENVIRO-TEC
49
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
FAN RUNS BUT NO HEATING.
(ELECTRIC HEAT UNITS)
No power to electric heat circuit on units with dual point power.
Loose or improper wiring from thermostat to electric heat contactor.
Loose or improper wiring of electric heat element.
Defective electric heat contactor.
Tripped or defective primary high limit switch.
Tripped secondary high limit switch.
Defective thermostat. Defective electric heat
element.
Improper aquastat or change
over relay operation on units
so equipped. (Note: electric
heat will not operate when hot water is present at the unit.)
FORM ET115.24-NOM4 (819)SECTION 5 - TROUBLESHOOTING
Establish power to electric heat circuit.
Verify all wiring connections and terminations, and verify proper wiring of thermostat.
Verify all wiring connections and terminations, and verify proper wiring of electric heat element.
With electric heat contactor energized, verify proper voltage on contactor load terminals. Replace as
required.
Turn thermostat to lowest set point and allow fan to run 10-15 minutes for limit switch to cool and reset. Then turn thermostat to highest set point and check for proper heating operation. If high limit trips again, check for the following conditions: improper voltage to heater element;
obstructed fan or unit outlet reducing air ow over heater
element; dirty or defective heater element causing hot
spot. If heater does not operate after sufcient time
for limit switch to cool, disconnect power and check continuity across primary high limit switch. Replace if defective.
Secondary high limit switches are designed to trip only during extreme failure conditions. Contact factory before attempting any corrective action.
Momentarily jumper thermostat contacts to simulate
proper operation. Replace thermostat as required.
Disconnect power and check continuity through heat
element. Replace as required.
Verify proper aquastat position on piping, and verify proper aquastat and change over relay operation. Replace as required.
TROUBLESHOOTING REFERENCE
Component Description Guide Name Option Description
Fan Relay Board (FCRB) –
Fan Coil Relay Board (FCRB)
Installation, Operation and Maintenance
Fan Relay Board II (FRBii)
Fan Relay Board II (FRBii)
– Installation, Operation and Maintenance
G3 PWM Board Fan Coil EC Motor IOM
NOTE: All documents downloadable at www.enviro-tec.com.
50
1st generation relay board, 24V Control Packages, units shipped before 3/31/2017
2nd generation relay board, 24V Control Packages
ECM controller on variable speed ECM units
ENVIRO-TEC
FORM ET115.24-NOM4 (819)
SECTION 6 - DIMENSIONAL DATA
The drawings in this section are for reference only and should not be used for construction purposes. Reference submittal documents for most current version.
6
FIGURE 33 - MODEL VHM, VERTICAL CONCEALED MASTER HIGH RISE, FCU, 88" CABINET
ENVIRO-TEC
74-80080
51
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
FIGURE 34 - MODEL VHS, VERTICAL CONCEALED SLAVE HIGH RISE, FCU, 88" CABINET
52
74-80081
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
74-80083
FIGURE 35 - MODEL VHA/VHB, VERTICAL HI-RISE TANDEM FIRE RATED AND NON-FIRE RATED, FCU COMBINATIONS, 88" CABINETS
ENVIRO-TEC
53
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
74-80083
54
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
FIGURE 36 - MODEL VH, VERTICAL CONCEALED HIGH RISE FAN COIL UNIT WITH 79" CABINET
ENVIRO-TEC
VH-031
55
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
VH-032
FIGURE 37 - MODEL VHM, VERTICAL CONCEALED MASTER HIGH RISE FAN COIL UNIT WITH 79" CABINET
56
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
VH-033
FIGURE 38 - MODEL VHS, VERTICAL CONCEALED SLAVE HIGH RISE FAN COIL UNIT WITH 79" CABINET
ENVIRO-TEC
57
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
See page 67 for dimensions. Refer to page 61, page 62, page 63 & page 64 for vertical Hi-rise Tandem Master & Tandem Slave configurations.
on page 75.
FIGURE 39 - MODEL VHA/VHB, VERTICAL HI-RISE FIRE RATED AND NON-FIRE RATED FCU COMBINATIONS, 79" CABINETS
58
VH-006-1
ENVIRO-TEC
DIMENSIONS - In. (mm) VHA SUPPLY AIR VHB SUPPLY AIR
VHA
(MASTER)
03 or 04 03 or 04
03 or 04 06 or 08
03 or 04 10 or 12
VHB
(SLAVE)
A B C D
18
(457)
20
(508)
24
(610)
42-1/4 (1073)
46-1/4 (1175)
54-1/4 (1378)
16-1/2
(419)
18-1/2
(470)
22-1/2
(572)
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
SINGLE DOUBLE TOP SINGLE DOUBLE TOP
E E F G E E F G
16
(406)
18
(457)
22
(559)
8 (203) 8 (203)
8 (203) 8 (203)
8 (203) 8 (203)
6
(152)8 (203)
6
12
(152)
(305)
8
12
(203)
(305)
8 (203) 8 (203)
8 (203) 8 (203)
8 (203)
6
(152)8 (203)
6
12
(152)
(305)
8
12
(203)
(305)
06 or 08 03 or 04 06 or 08 06 or 08
06 or 08 10 or 12
10 or 12 03 or 04 10 or 12 06 or 08 10 or 12 10 or 12
See page 58 for notes.
20
(508)
24
(610)
24
(610)
46-1/4 (1175)
54-1/4 (1378)
54-1/4 (1378)
18-1/2
(470)
22-1/2
(572)
22-1/2
(572)
18
(457)
22
(559)
22
(559)
8 (203) 8 (203)
8 (203) 8 (203)
8 (203)
6
(152)
8
(203)
8
(203)
12
(305)
12
(305)
12
(305)
8 (203) 8 (203)
8 (203)
8 (203)
6
(152)
8
(203)
8
(203)
12
(305)
12
(305)
12
(305)
6
ENVIRO-TEC
59
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
VHC/VHS/VHM
&
VHA/VHB
VHA/VHB
FIGURE 40 - MODEL VH, VERTICAL HIGH RISE COIL UNIT, ALUMINUM DISCHARGE GRILLE
60
74-80020
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
MODEL VHC UNITS SHOWN ABOVE WITH OPTIONAL RISER CHASE. RISER CHASE NOT AVAILABLE ON VHM UNITS. VHA UNITS MUST BE MATED TO VHB UNITS.
6
SEE PAGE 63 FOR DETAILS.
VH-010
FIGURE 41 - MODEL VHC/VHM/VHA VERTICAL HIGH RISE FAN COIL UNIT ARRANGEMENT DESIGNATIONS
ENVIRO-TEC
61
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
VHC AND VHS
VHB
VHA
SEE PAGE 63 FOR DETAILS.
FIGURE 42 - MODEL VHC W/O RISERS & VHS/VHB VERTICAL HIGH RISE FAN COIL UNITS, UNIT ARRANGEMENT DESIGNATIONS
62
VH-011
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
VHC
VH
6
FIGURE 43 - MODEL VH VERTICAL HIGH RISE COIL UNIT OUTSIDE INLET DIMENSIONS
ENVIRO-TEC
VH-018
63
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
TANDEM MASTER & TANDEM SLAVE INSTALLATION
INSTRUCTIONS ON PAGES
TANDEM MASTER & TANDEM SLAVE FIRE RATED
TANDEM MASTER & TANDEM SLAVE NON-FIRE RATED
page 75 - page 77.
FIGURE 44 - MODEL VHM/VHA/VHC TANDEM MASTER & TANDEM SLAVE UNIT CONFIGURATION FAN COIL UNIT
VH-043
64
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
VH-106
FIGURE 45 - ASSEMBLY INSTRUCTIONS RETURN PANEL WITH LATCHES, QUICK OPENING OR TAMPER PROOF, MODEL VHC/VHM/VHS HIGH RISE FCU
ENVIRO-TEC
65
VHS
VHS
VH
VH
VHS
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
FIGURE 46 - PREPARATION INSTRUCTIONS FOR MODEL VHC/VHM VERTICAL HIGH RISE FCU "SHIP LOOSE" RISER ASSEMBLIES
66
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
FIGURE 47 - FULL LOUVERED ALUMINUM RETURN AIR/WALL PANEL MODEL VH VERTICAL HIGH RISE FAN COIL UNIT
ENVIRO-TEC
VH-013
67
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
74-80084
FIGURE 48 - MODEL VH VERTICAL HIGH RISE FAN COIL UNIT STANDARD SURFACE MOUNT WALL PANEL
68
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
assembly instructions on
in Tandem Master & Tandem Slave pairs.
VH-014
6
page 65 for details.
FIGURE 49 - RECESSED WALL PANEL MODEL VH VERTICAL HIGH RISE FAN COIL UNIT
ENVIRO-TEC
69
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
assembly instructions on page for details.
in Tandem Master & Tandem Slave pairs.
VH-047
FIGURE 50 - MODEL VH VERTICAL HIGH RISE FAN COIL UNIT STANDARD RETURN WALL PANEL WITH ADA THERMOSTAT
70
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
TABLE 18 - DISCHARGE REGISTER PERFORMANCE DATA, VH STANDARD FCU 88" CABINET, SINGLE AND DOUBLE SUPPLY
SINGLE SUPPLY
UNIT
SIZE
CFM
(SEE NOTE 5)
W (IN.) H (IN.)
Pv
(in W.G.)
03 375 16 8 0.013 0.0370 0.0240 <20 16-36 9.5 04 450 16 8 0.018 0.0524 0.0344 <20 19-38 10 06 616 18 12 0.017 0.0523 0.0353 <20 18-45 13 08 860 18 12 0.024 0.0698 0.0458 26 26-52 16 10 966 22 14 0.017 0.0524 0.0354 21 27-62 21 12 1350 22 14 0.024 0.0697 0.0457 26 33-69 23
DOUBLE SUPPLY
UNIT SIZE
CFM
(SEE NOTE 5)
W (IN.) H (IN.)
Pv
(in W.G.)
03 375 16 8 0.006 0.0170 0.0110 <20 11-24 10 04 450 16 8 0.008 0.0230 0.0150 <20 11-27 10.5 06 616 18 12 0.003 0.0072 0.0042 <20 10-35 11.5 08 860 18 12 0.006 0.0170 0.0110 <20 12-37 12 10 966 22 14 0.006 0.0170 0.0110 <20 13-42 12 12 1350 22 14 0.008 0.0230 0.0150 <20 14-45 14
REGISTER DATA
Pt
(in W.G.)
(IN W.G.)
REGISTER DATA
Pt
(in W.G.)
(IN W.G.)
Ps
Ps
NC
NC
THROW
(FT)
THROW
(FT)
DROP
(FT)
DROP
(FT)
6
NOTES:
1. NC data is at 0° deflection. For 22.5° deflection, add 1 NC. For 45° deflection, add 7 NC.
2. Throws are for velocities of 50 and 150 FPM at 0° deection.
3. For 22. 5° and 45° deection, multiply by 0.67.
4. Drops are at 0° deection. For 22.5° deection, multiply by 0.85. For 45° deection, multiply by 0.66.
5. Register Data is based on zero static and CRM show at high speed motor operation.
6. Data above does not reect optional opposed blade damper information.
ENVIRO-TEC
71
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
TABLE 19 - DISCHARGE REGISTER PERFORMANCE DATA, VH STANDARD FCU 79" CABINET, SINGLE AND DOUBLE SUPPLY
SINGLE SUPPLY
UNIT SIZE
CFM
(SEE NOTE 5)
W (IN.) H (IN.)
Pv
(in W.G.)
03 375 16 8 0.013 0.0370 0.0240 <20 13-32 10 04 450 16 8 0.018 0.0524 0.0344 23 20-39 10.5 06 616 18 8 0.026 0.0765 0.0505 32 20-39 10.5 08 860 18 8 0.054 0.1624 0.1084 39 32-54 17
DOUBLE SUPPLY
UNIT SIZE
03 375 16 8
CFM
(SEE NOTE 5)
W (IN.) H (IN.)
Pv
(in W.G.)
0.003 0.0072 0.0042 <20 8-25 9
04 450 16 8 0.005 0.0160 0.0110 <20 9-25 10 06 616 18 8 0.007 0.0180 0.0110 <20 13-30 10 08 860 18 8
0.015 0.0380 0.0230 21 18-39 11
10 966 22 8 0.015 0.0380 0.0230 <20 17-42 12.5 12 1350 22 8 0.019 0.0560 0.0370 21 21-45 14
REGISTER DATA
Pt
(in W.G.)
(IN W.G.)
REGISTER DATA
Pt
(in W.G.)
(IN W.G.)
Ps
Ps
NC
NC
THROW
(FT)
THROW
(FT)
DROP
(FT)
DROP
(FT)
NOTES:
1. NC data is at 0° deflection. For 22.5° deflection, add 1 NC. For 45° deflection, add 7 NC.
2. Throws are for velocities of 50 and 150 FPM at 0° deection.
3. For 22. 5° and 45° deection, multiply by 0.67.
4. Drops are at 0° deection. For 22.5° deection, multiply by 0.85. For 45° deection, multiply by 0.66.
5. Register Data is based on zero static and CRM show at high speed motor operation.
6. Data above does not reect optional opposed blade damper information.
72
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
FIGURE 51 - SUGGESTED RISER FLOOR OPENINGS VHC & VHM
ENVIRO-TEC
VH-109
73
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
FIGURE 52 - RISER TERMINOLOGY, MODEL VHC, VHM, VHA UNITS
74
VH-110
ENVIRO-TEC
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
VERTICAL HI-RISE TANDEM UNITS VHA/VHB INSTALLATION INSTRUCTIONS
Receipt & Initial Installation
General
This publication details the installation requirements for the Enviro-Pac dual unit configuration of the Verti­cal High Rise, VH, unit assembly. Use of this docu­ment for systems or products not manufactured or sup­plied by ENVIRO-TEC shall not be applicable.
All products covered by this manual have been test­ed in accordance with UL1479 (2012) - Fire Tests Of Through Penetration Fire Stop Assemblies. Spe­cific information about the ENVIRO-PAC VHA/VHB UL1479 (2012) listing may be viewed on the Warnock Hersey Listed Product Directory at https://whdirectory . intertek.com. Reference WH file number JCI/PF60-01.
Specific ETL listed model numbers may be found in the current ETL Listed Mark Directory at http://www. intertek.com/directories/.
For other VH product installation and operational in­structions, refer to IOM-FCUVH.
The Installation Instructions found within this manual have been specifically drawn and detailed to meet the requirements of UL1479 (2012). Some jurisdictions may have additional installation requirements above and beyond those detailed in this document; consult with the authority having jurisdiction for specific ad­ditional requirements. In all cases, the instructions de­tailed in this document must be followed to maintain the UL 1479 (2012) fire rating.
Installation
1. In order to achieve the 1 hour re rating, ENVI­RO-PAC unit assembly must be installed into a minimum 1-hour re rated wall assembly of gyp­sum and steel stud, gypsum and wood stud, con­crete, or masonry construction with a minimum overall thickness of 4-3/4”. The wall assembly shall extend into the unit spacer plate. When ap­plicable, attach studs of the wall to the unit spacer plate with sheet metal screws spaced nominally 12” O.C. When built of gypsum construction, the following minimum requirements must be met.
a. Studs – Wood or steel studs nominal 3-1/2”
thick, spaced maximum 24” O.C.
b. Gypsum Board – Minimum 5/8“ Type X
Gypsum board with a minimum of one layer. Gypsum board must be installed on each side of the wall assembly.
2. Place unit assembly in its desired location. Check
riser number, oor number, room number, and
unit tag number against the tag label on the unit, making sure that the unit assembly is installed with the space between the two units centered in the wall between each room.
3. Anchor unit assembly to oor through unit bot-
tom. Due to oor leveling, some shimming may be necessary so unit is plumb and square to oor/
ceiling.
4. Install oor stud reception channels up to unit sides at the connector plate.
5. Install ceiling stud reception channel over the unit assembly, leaving space for riser penetration.
6. Install the wall studs into the recess in the unit assembly using #6 x ½ drywall screws spaced as necessary.
A void placing screws where they may pen­etrate the risers, coil, piping, or electrical system.
7. Install balance of the studs into ceiling/oor re­ception channels at a spacing to meet project
specications and local, state, or national codes.
In no cases should stud spacing be greater than 24” O.C.
8. Install studs from top of unit to ceiling. Locates studs at each unit corner.
9. Make necessary electrical and plumbing connec­tions to unit.
10. Two installation congurations may be used for the ENVIRO-PAC units. The following details standard installation per Figure 53 on page 76.
a. Install minimum 5/8” Type X gypsum board
to all exposed sides of the unit exterior, in­cluding top and front. Gypsum panels may be applied directly to unit casing or may be furred out for plumbness. Any supply air, outside air, or thermostat openings shall be let-in as necessary.
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b. The gypsum panel installed to the face of the
Gypsum may have cut out to accomodate supply, return and thermostat
1
1A
2
Factory Installed Insulation
1A Factory Installed Gypsum
LD19316
A
ttached to pre-existing ceiling or floor assembly
1Bi
unit should be applied directly to the front of the unit, unless a wall recessed return air grille is used, in which case this panel will be furred-out. Any supply air , return air , or ther ­mostat openings shall be let-in as necessary.
c. Attach gypsum board to unit with sheet met-
al screws spaced 8” O.C. around the perim­eter and 12” O.C. in the field, ensuring that screws are not located where they might pen­etrate interior working of unit.
d. Gypsum board shall be tightly butted against
the wall assembly on all exposed sides, in­cluding top of unit.
11. For alternate installation per Figure 54 on page 76, unit framing must be installed to top of unit.
a. Install minimum 25 GA, nominal 3-1/2”
wide, steel track to the top of the fan coil unit, at top front and two top sides as shown in Figure 54 on page 76.
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
FIGURE 53 - STANDARD INSTALLATION
b. Attach steel track using sheet metal screws
spaced 12” O.C.
c. Install identical steel track to the ceiling or
floor assembly using appropriate anchors. Friction fit minimum 25 GA nominal 3-1/2” steel studs into the top and bottom track and secure with pan head screws.
d. Install one stud at each corner of the fan coil
unit.
e. Install gypsum board to the front and side of
the fan coil unit as described in Step 10.
f. Extend the gypsum board to the ceiling or
floor assembly, attaching to steel studs and track with Type S screws spaced maximum 8” O.C.
12. Risers shown in the standard location. Risers may be installed on the left or right side of Unit A. Wall construction should remain the same, regardless of riser location.
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FIGURE 54 - ALTERNATE INSTALLATION
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B B
1/2" TYP
SPACING AS NECESSARY
10. INSTALL GYPSUM BOARD TO SIDES
OF UNIT WITH OPTIONAL CUT OUTS FOR
SUPPLY, OUTSIDE AIR, AND THERMOSTAT
11. INSTALL GYPSUM BOARD TO FACE OF UNIT WITH OPTIONAL CUT OUTS
FOR SUPPLY, RETURN, AND THERMOSTAT
7. INSTALL STUDS FROM TOP OF UNIT TO CEILING (4 CORNERS)
9. INSTALL GYPSUM BOARD TO WALLS
SHEET 2 OF 2
5. INSTALL WALL STUD INTO RECESS FORMED BY
CONNECTOR PLATE
SEE DETAIL A ABOVE
MAY VARY
RISER LOCATION
WALL STUDS
=5/8" TYPE-X GYPSUM BOARD, FIELD SUPPLIED
=5/8" TYPE-X GYPSUM BOARD, FACTORY SUPPLIED
3 5/8-25 GA STEEL STUD
24" O.C. TYP
#6 X 1/2" DRYWALL SCREWS
CAUTION-AVOID PLACING SCREW WHERE THEY MAY PENETRATE THE RISER, COIL, PIPING, OR ELECTRICAL SYSTEM.
CONNECTOR PLATE
PLAN VIEW
UNIT A UNIT B
SECTION "B-B"
UNIT A
DETAIL-A
UNIT B
PX-70-0001
SECTION 6 - DIMENSIONAL DATAFORM ET115.24-NOM4 (819)
6
FIGURE 55 - MOUNTING DETAILS
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NOTES
FORM ET115.24-NOM4 (819)SECTION 6 - DIMENSIONAL DATA
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FORM ET115.24-NOM4 (819)
The following factors can be used to convert from English to the most common SI Metric values.
TABLE 20 - SI METRIC CONVERSION
MEASUREMENT MULTIPLY ENGLISH UNIT BY FACTOR TO OBTAIN METRIC UNIT
Capacity Tons Refrigerant Effect (ton) 3.516 Kilowatts (kW)
Power Horsepower 0.7457 Kilowatts (kW)
Flow Rate Gallons / Minute (gpm) 0.0631 Liters / Second (l/s)
Feet (ft) 0.3048 Meters (m)
Length
Inches (in) 25.4 Millimeters (mm)
Weight Pounds (lbs) 0.4538 Kilograms (kg)
Velocity Feet / Second (fps) 0.3048 Meters / Second (m/s)
Feet of Water (ft) 2.989 Kilopascals (kPa)
Pressure Drop
Pounds / Square Inch (psi) 6.895 Kilopascals (kPa)
TEMPERATURE
To convert degrees Fahrenheit (°F) to degrees Celsius (°C), subtract 32° and multiply by 5/9 or 0.5556.
Example: (45.0°F - 32°) x 0.5556 = 27.2°C To convert a temperature range (i.e., a range of 10°F)
from Fahrenheit to Celsius, multiply by 5/9 or 0.5556. Example: 10.0°F range x 0.5556 = 5.6 °C range
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ENVIRO-TEC is a registered trademark of Johnson Controls in the United States of America and other countries. Other trademarks used herein may be trademarks or registered trademarks of other companies.
Catalog: ET115.24-NOM4 (819) Supersedes ET115.24-NOM4 (317) © 2019 Johnson Controls www.enviro-tec.com
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