Enviro C Series User manual

SERIES C
VERTICAL BELT DRIVE
BLOWER COIL UNITS
Supersedes: ET115.24-NOM6 (615) Form ET115.24-NOM6 (0521)
MODELS VB & VR
INSTALLATION, OPERATION & MAINTENANCE

ENVIRO-TEC
2
FORM ET115.24-NOM6 (0521)
TABLE OF CONTENTS
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
CAUTION identies a hazard which
could lead to damage to the machine,
damage to other equipment and/or
environmental pollution. Usually an
instruction will be given, together with
a brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.
DANGER indicates an imminently
hazardous situation which, if not
avoided, will result in death or serious
injury.
WARNING indicates a potentially
hazardous situation which, if not
avoided, could result in death or se-
rious injury.
TABLE OF CONTENTS.................................................................................................................2
SAFETY SYMBOLS ......................................................................................................................2
SAFETY CONSIDERATIONS ........................................................................................................3
PRE START-UP..............................................................................................................................4
Receiving and Inspecting ....................................................................................................................4
Unit Rigging and Placement.................................................................................................................4
Clearance ...............................................................................................................................................4
FIELD WIRING...............................................................................................................................4
BELTS, DRIVES, AND BEARINGS...............................................................................................5
DETERMINING DEFLECTION FORCE.........................................................................................5
REPLACEMENT PARTS ...............................................................................................................6
COOLING/HEATING MEDIUM CONNECTIONS...........................................................................6
CONDENSATE DRAIN AND TRAPS ............................................................................................7
GENERAL BELT AND BEARING MAINTENANCE......................................................................8
MOTOR ELECTRICAL DATA........................................................................................................9
UNIT WEIGHT DATA......................................................................................................................9
MOTOR/DRIVE WEIGHT DATA.....................................................................................................9
MODEL VB ARRANGEMENTS...................................................................................................10
MODEL VR ARRANGEMENTS...................................................................................................10
INSPECTION & START-UP CHECKLIST....................................................................................11
DIMENSIONS...............................................................................................................................12
Model VB Basic Unit - Discharge Arrangement 2.............................................................................12
Model VB Basic Unit - Discharge Arrangement 1 with Blow-thru Electric Heat............................13
Model VR Basic Unit - Discharge Arrangement 2.............................................................................14
Model VMR with Inlet Damper Section (Requires Base rail) - Discharge Arrangement 2.............15
3 Inch Baserail Assembly ...................................................................................................................16
Model VB/VR Discharge Plenum, Sizes 08-30 ..................................................................................17
Model VB Return Plenum, Sizes 08-30..............................................................................................18
Model VB/VR Discharge Section w/ Heating Coil, Sizes 08-30........................................................19

ENVIRO-TEC 3
FORM ET115.24-NOM6 (0521)
The equipment covered by this manual is designed for
safe and reliable operation when installed and operated
within its design specication limits. To avoid personal
injury or damage to equipment or property while
installing or operating this equipment, it is essential
that qualied, experienced personnel perform these
functions using good judgment and safe practices. See
the following cautionary statements.
ELECTRICAL SHOCK HAZARDS.
All power must be disconnected prior
to installation and serving this equip-
ment. More than one source of power
may be present. Disconnect all power
sources to avoid electrocution or shock
injuries.
MOVING PARTS HAZARDS. Mo-
tor and Blower must be disconnected
prior to opening access panels. Motors
can start automatically, disconnect
all power and control circuits prior to
servicing to avoid serious crushing or
dismemberment injuries.
HOT PARTS HAZARDS. Electric Re-
sistance heating elements must be dis-
connected prior to servicing. Electric
Heaters may start automatically, dis-
connect all power and control circuits
prior to servicing to avoid burns.
Check that the unit assembly and com-
ponent weights can be safely supported
by rigging and lifting equipment.
All assemblies must be adequately
secured during lifting and rigging by
temporary supports and restraints un-
til equipment is permanently fastened
and set in its nal location.
All unit temporary and permanent
supports must be capable of safely
supporting 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.
All fastening devices must be designed
to mechanically lock the assembly in
place without the capability of loosen-
ing or breaking away due to system
operation, vibration, impact or seismic
event.
Secure all dampers when servicing
damper, actuator or linkages. Dampers
may activate automatically, disconnect
control circuits or pneumatic control
systems to avoid injury.
Protect adjacent ammable materials
when brazing, Use ame and heat pro-
tection barriers where needed. Have
re extinguisher available and ready
for immediate use.
SAFETY CONSIDERATIONS

ENVIRO-TEC
4
FORM ET115.24-NOM6 (0521)
PRE START-UP
Improper installation, adjustment,
alterations, service or maintenance
can cause injury and property damage,
as well as possible voiding of factory
warranty. For assistance or additional
information, consult a qualied con-
tractor.
Receiving and Inspecting
Thoroughly examine the exterior and interior of all
units for transportation damage to the cabinet, piping,
blower(s), motor(s), coil(s), electric heat and electrical
components. Interior damage may occur, even with no
visible exterior damage. If damage is found, immediately
le a claim with the carrier. Note the damage on the bill
of lading before signing for the shipment.
Check the bill of lading for verication that all items
shown (including loose items) have been received.
Notify the manufacturer’s representative of any
shortages or items shipped in error.
Unit Rigging and Placement
Install ductwork to comply with ASHRAE Fundamentals
Handbook, SMACNA, NFPA 90A and local code.
The installation mustconform with local buildingcodes
and the National Electric Code.
Locate unit support in accordance with the mechanical
and structural plans. If so equipped, locate the isolator
placement and correct size as shown on the submittal
drawing.
If oor mount isolators are required, factory or eld
provisions must be made for isolator attachment. Units
can be mounted directly to the oor or on a base rail.
The optional base rail is recommended for units with
isolators.
Do not handle the unit using coil stubout connectors, as
damage may occur at brazed joint(s).
Clearance
All units, including those with electric heat, are listed
for zero clearance to combustibles.
Sufficient clearance for normal servicing of this
equipment is recommended.
All electrical panels must have 36” working space in
front of panel to meet National Electric Code; however,
local inspectors maywave this requirementif the hinged
cover has a 90° free swing.
FIELD WIRING
Prior to installing any wiring, check
the unit name plate for main power
voltage, control voltage, transformer
sizing and any fuse sizing. All eld
wiring must comply with National
Electric Code and local code require-
ments.
Tighten all wiring lugs and terminals prior to
connecting power to the unit, as they may loosen during
transportation.
Route the power lines to the power distribution
terminals inside the control enclosure. If a factory wired
disconnect switch is installed, then connect the power
lines to the line side of the switch.
Mount and wire any eld installed items as indicated on
the factory supplied wiring diagram. When mounting
eld installed components, do not jumper out or rewire
any factory wiring without written approval from
ENVIRO-TEC. Violation will void warranty.

ENVIRO-TEC 5
FORM ET115.24-NOM6 (0521)
BELTS, DRIVES, AND BEARINGS
For safety, please turn off all power
before checking belt tension.
Prior to starting the unit, tighten all set screws on the
fan(s), sheaves and bearings where applicable. Set
screws may loosen during transportation.
Sheaves must be in line. Use a straight edge to verify.
General belt tension rules for V-Belt drives:
• Ideal tension is the lowest tension at which the belt
will not slip under peak load conditions.
• Check tension frequently during the rst 24-48
hours of operation.
• Over tensioning shortens belt and bearing life.
• Keep belts free from foreign material which may
cause slip.
• Make V-Belt inspection on a periodic basis. Ten-
sion when slipping. Never apply belt dressing, as
this will damage the belt and cause early failure.
• The resilient blower bearing must not deect later-
ally once belt is tightened.
DETERMINING DEFLECTION FORCE
(see Fig. 1)
Example Solution
Belt Span = 20”
Belt Type – A, new, unnotched
RPM = 1000
Small Sheave Diameter = 4.0”
Deection = 20 ÷ 64 =
.313” (round to 5/16”).
Referring to table below,
deection force at calcu-
lated deection is 6.8lbs.
FIG. 1 - COMPUTING DEFLECTION FORCE
See table below for deection force in pounds.
Used Belt New Belt Used Belt New Belt
3.0 - 3.6" 1000 - 2500 3.7 5.5 4.1 6.1
3.8 - 4.8" 1000 - 2500 4.5 6.8 5.0 7.4
5.0 - 7.0" 1000 - 2500 5.4 8.0 5.7 9.4
3.4 - 4.2" 860 - 2500 4.9 7.2
4.4 - 5.6" 860 - 2500 5.3 7.9 7.1 10.5
5.8 - 8.6" 860 - 2500 6.3 9.4 8.5 12.6
Not Recommended
A, AX
B, BX
Gripnotch Belts and
Notched Gripbands
DEFLECTION FORCE — LBS.
Belt
Type
Smalllest
Sheave
Diameter
Range
RPM Range Supe r Gripbelts an d
Unnotched Gripband s
LD13903
LD13902

ENVIRO-TEC
6
FORM ET115.24-NOM6 (0521)
REPLACEMENT PARTS
Replacement parts may be ordered from the local
ENVIRO-TEC representative. Factory replacement
parts should be used wherever possible to maintain
agency listings. Should replacement parts not be
purchased from the factory, use only parts duplicating
the exact type, size, voltage and other operating
characteristics of the original part. Contact the local
representative before using any substitute part or
making unit modications. Any substitutions and/or
modications not authorized by the factory will void
the unit warranty and could result in personal injury
and/or property damage.
When ordering parts, the following information must be
supplied to ensure proper part identication:
1. Complete unit model number
2. CO number from the unit nameplate
3. Complete parts description, including any identi-
cation numbers.
COOLING/HEATING MEDIUM CONNECTIONS
Toxic residues and loose particles
resulting 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. Not for use with
domestic or potable water systems.
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.
Hot water and cooling coils are male sweat connection.
Use appropriate brazing alloy for system temperature
and pressure. Refer to equipment construction submittal
drawing for specic connection size. MAXIMUM
HYDRONIC SYSTEM OPERATING PRESSURE
MUST NOT EXCEED 450 PSIG.
All factory provided or eld provided valve packages
are to be installed as required, and all service valves
should be checked for proper operation. Refer to the
valve component manufacturer’s submittals and/or
IOM manual for proper installation, troubleshooting,
and operational guidance.
Valves and TXVs must be secured and supported to
avoid damage to coil headers or distributor tubes. All
valves, pipes, and components must be sufciently
supported to ensure structural integrity and proper
operation of the unit.
All water coils must be protected from
freezing after initial lling with water.
Even if the system is drained, unit coils
may still hold enough water to cause
damage when exposed to temperatures
below freezing.
Refrigerant systems should be tested with dry nitrogen
rather than air to prevent the introduction of moisture
into the system. In the event that leaking or defective
components are discovered, the Sales Representative
must be notied BEFORE any repairs are attempted.
All leaks should be repaired before proceeding with
the installation.
After system integrity has been established, the piping
should be insulated in accordance with the project
specications. ALL chilled water piping and valves or
refrigerant suction piping not located over drain pans
must be insulated to prevent damage from sweating.
This includes factory and eld piping inside the unit
cabinet.
The drain should always be connected and piped to an
acceptable disposal point. For proper moisture carry-
off, the drain piping should be sloped away from the
unit at least 1/8” per foot. A drain trap may be required
by local codes and it is strongly recommended for odor
containment.

ENVIRO-TEC 7
FORM ET115.24-NOM6 (0521)
CONDENSATE DRAIN AND TRAPS
Drain lines should be at least the same size as the drain
pan connection. Properly sized traps should be used to
allow the condensate from the coils to drain from the
drain pan. See Fig. 2.
Trap detail for negative
cabinet static pressure Trap detail for positive cabinet static pressure
NO BASE RAIL
Housekeeping pad
Required to accommodate
trap height
WITH BASE RAIL
Depending on static
pressure, housekeeping
pad may not be needed
for trap installation
WITH BASE RAIL AND
HOUSEKEEPING PAD
FIG. 2 - CONDENSATE DRAIN & TRAPS
LD13929

ENVIRO-TEC
8
FORM ET115.24-NOM6 (0521)
GENERAL BELT AND BEARING MAINTENANCE
Frequency of bearing re-lubrication depends upon the
operating conditions. The proper amount of lubricant
in the bearings is very important. Both excessive and
inadequate lubrication may cause failure. The bearings
should be re-lubricated while they are rotating (if it is
safe to do so); the grease should be pumped in slowly
until a slight bead forms around the seals. It is solely
the owner’s responsibility for maintaining a proper
lubrication schedule. Failure to do so may cause
substantial unit damage and voiding of the factory
warranty. Note that only those bearings equipped with
a grease tting can be re-lubricated.
The following is a generic guide intended for standard
equipment used in common situations.
MAINTENANCE TO EVERY3MONTHS EVERY
BE PERFORMED OF OPERATION (MINIMUM) FALL
Filters (as required) x
Grease Bearings x
Inspect & Clean Blower Wheel x
LubricateFan Motor x
(if applicable)
Check Belt Tension x
Check Electrical Connections x
Check Bearings, Drives & x
Blower Wheel forTightness
Normal operation is based on 8 hours a day. If unit runs more than this, adjust accordingly.
RECOMMENDED TORQUE FOR TIGHTENING SETSCREWS
Set Screw Diameter Minimum RecommendedTorque
Inch lbs. Foot lbs.
#10 28 2.3
1/4 66 5.5
5/16 126 10.5
3/8 228 19.0
7/16 348 29.0
1/2 504 42.0
5/8 1104 92.0
This manual is not intended to sup-
plant regulations or local codes having
jurisdiction. It is recommended that
these items be reviewed and com-
pleted prior to initiating equipment
start-up.
LD13904

ENVIRO-TEC 9
FORM ET115.24-NOM6 (0521)
08 12 16 20 25 30
125 [57] 131 [60] 160 [73] 167 [76] 231 [105] 236 [107]
42 [19] 53 [24] 59 [27] 73 [33] 91 [41] 91 [41]
42 [19] 42 [19] 42 [19] 50 [23] 55 [25] 55 [25]
35 [16] 37 [17] 49 [22] 53 [24] 76 [35] 80 [36]
22 [10] 26 [12] 35 [16] 38 [17] 76 [35] 76 [35]
29 [13] 30 [14] 33 [15] 35 [16] 44 [20] 44 [20]
1 ROW - DRY 12 [5] 14 [6] 17 [8] 21 [10] 23 [10] 27 [12]
1 ROW - WET 14 [6] 17 [8] 21 [10] 26 [12] 28 [13] 34 [15]
2 ROW - DRY 17 [8] 21 [10] 26 [12] 32 [15] 37 [17] 43 [20]
2 ROW - WET 21 [10] 27 [12] 33 [15] 42 [19] 48 [22] 56 [25]
4 ROW - DRY 29 [13] 36 [16] 45 [20] 57 [26] 65 [30] 76 [35]
4 ROW - WET 37 [17] 47 [21] 58 [26] 75 [34] 86 [39] 101 [46]
6 ROW - DRY 40 [18] 51 [23] 64 [29] 81 [37] 93 [42] 109 [50]
6 ROW - WET 52 [24] 66 [30] 84 [38] 109 [50] 124 [56] 146 [66]
COIL ROWS
COMPONENT
UNIT SIZE
BASIC UNIT
DAMPER SECTION
BLOW THRU ELECTRIC HEATER
DISCHARGE COIL SECTION
SUPPLY PLENUM
RETURN PLENUM (VB)
NOTES:
1.Unit weight data is shipping weight in pounds (kilograms).
2.Discharge section includes a 2 row coil.
1/3 1/2 3/4 1 1 1/2 2 3
SINGLE PHASE 37 [17] 37 [17] 45 [20] 47 [21] -- -- --
THREE PHASE 34 [15] 34 [15] 40 [18] 43 [20] 46 [21] 53 [24] 81 [37]
MOTOR HP
TYPE
115/1 208/1 230/1 277/1 208/3 230/3 460/3 575/3
1/3 6.3 3.5 3.2 2.6 1.7 1.5 0.8 -
1/2 7.8 4.3 3.9 3.6 2.2 2.1 1.1 0.9
3/4 10.6 5.4 5.3 5.0 3.2 3.0 1.5 1.2
115.0 8.3 7.5 5.5 4.0 3.6 1.8 1.4
- - - - 5.3 5.0 2.5 1.9
2- - - - 7.0 6.4 3.2 2.5
3- - - - 9.1 9.0 4.5 3.2
MAXIMUM MOTOR AMPERAGE
HORSEPOWER
VOLTAGE
1-1/2
NOTES:
1. AMPs shown above are NEC full load AMPs for standard motor. Actual motor nameplate AMPs may vary.
2. Consult factory for applications requiring special motors.
MOTOR ELECTRICAL DATA
UNIT WEIGHT DATA
MOTOR/DRIVE WEIGHT DATA
LD13905

ENVIRO-TEC
10
FORM ET115.24-NOM6 (0521)
Standard Rotation
Arrangement 2
Reverse Rotation
Arrangement 1 Horizontal Rear Discharge
Arrangement 7
Reverse Rotation
Arrangement 1 Horizontal Rear Discharge
Arrangement 7
NOTES:
1.Refer to Dimensional Data for unit dimensions.
2.Fan arrangements are also available with inlet damper section (Model VR) and return plenum section (Model VB).
3.Side access filter rack standard on arrangement 7 (Model VR).
4.Discharge heating coil section and supply plenum are not available with arrangement 7.
5.All drawings subject to change without prior notice. Refer to www.enviro-tec.com for current submittal drawings.
Standard Rotation
Arrangement 2
MODEL VB ARRANGEMENTS
MODEL VR ARRANGEMENTS
LD13906