Greenheck Fan Fan 474118 User Manual

Part Number 474118  
®
Energy Recovery Laboratory Exhaust  
Installation, Operation and Maintenance Manual  
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the  
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions  
could result in personal injury and/or property damage! Retain instructions for future reference.  
Vektor ERS-MD  
Greenheck model VKERS is a pre-engineered energy  
recovery system designed to connect directly to a  
Vektor-MD high plume dilution blower with bypass air  
by  
plenum. This installation manual covers procedures  
for receiving, installing and maintaining the energy  
recovery coil section.  
For additional instruction and maintenance  
information on the Vektor-MD high plume dilution  
VK-MD instruction manual, part number 464652.  
General Safety Information  
Only qualified personnel should install this fan system.  
Personnel should have a clear understanding of these  
instructions and should be aware of general safety  
precautions. Improper installation can result in electric  
shock, possible injury due to coming in contact with  
moving parts, as well as other potential hazards.  
Other considerations may be required if high winds  
or seismic activity are present. If more information  
is needed, contact a licensed professional engineer  
before moving forward.  
1. Follow all local electrical and safety codes, as well  
as the National Electrical Code (NEC), the National  
Fire Protection Agency (NFPA), where applicable.  
Follow the Canadian Electric Code (CEC) in  
Canada.  
2. The rotation of the wheel is critical. It must be free  
to rotate without striking or rubbing any stationary  
objects.  
3. Motor must be securely and adequately grounded.  
4. Do not spin fan wheel faster than maximum  
cataloged fan rpm. Adjustments to fan speed  
significantly effects motor load. If the fan RPM is  
changed, the motor current should be checked to  
make sure it is not exceeding the motor nameplate  
amps.  
DANGER  
Always disconnect power before working on or near  
a fan. Lock and tag the disconnect switch or breaker  
to prevent accidental power up.  
CAUTION  
5. Do not allow the power cable to kink or come in  
contact with oil, grease, hot surfaces or chemicals.  
Replace cord immediately if damaged.  
6. Verify that the power source is compatible with the  
equipment.  
When servicing the fan, motor may be hot enough  
to cause pain or injury. Allow motor to cool before  
servicing.  
CAUTION  
7. Never open access doors to a duct while the fan is  
running.  
Precaution should be taken in explosive  
atmospheres.  
Vektor-ERS Energy Recovery Plenum Laboratory Exhaust  
 
1
Removing from Storage  
Unit Identification  
As fans are removed from storage to be installed  
in their final location, they should be protected and  
maintained in a similar fashion, until the fan equipment  
goes into operation.  
System Identification Tags  
The tag shown is an example of an identification  
label on the fan. The information provides general  
details about the fan, as well as containing specific  
information unique to the unit. When contacting  
your Greenheck representative with future needs or  
questions, please have the information on this label  
available. Tags  
Prior to assembly and installation of the Vektor fan  
and system components, inspect the fan assembly to  
make sure it is in working order.  
1. Check all fasteners, set screws on the fan, wheel,  
bearings, drive, motor base and accessories for  
tightness.  
are mounted in  
an area which is  
clearly visible,  
usually on the  
side of the fan  
cabinet.  
2. Rotate the fan wheel(s) by hand and assure  
no parts are rubbing. Access to the wheel is  
obtained through a bolted panel located on the  
side of the fan housing.  
ERS and Vektor fan systems may arrive in component  
pieces due to shipping restrictions. Individual  
components of a system have matching identification  
tags which should be used to identify and assemble  
the complete system. Assembling systems with  
different identification tags can cause reductions in  
the fan(s) performance.  
Table of Contents  
Receiving, Handling, Storage. . . . . . . . . . . . . . . . . . 2  
Unit Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
Installation  
Plenum Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Unit Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
Plenum Service Clearances and Access . . . . . . . . 5  
Assembly and Installation  
Roof Curb and Plenum Cabinet. . . . . . . . . . . . . 5-6  
Duct Connections  
General Information  
To ensure a successful installation, the instructions in  
this manual should be read and adhered to. Failure to  
comply with proper installation procedures may void  
the warranty.  
Plenum Inlet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
Drain Trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
Coils  
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9  
Coil Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 9  
Coating Touch-Up Procedure . . . . . . . . . . . . . . . . 10  
Optional Accessories  
Dirty Filter Sensor (Magnehelic Gauge). . . . . . . . 10  
Vapor Tight Lights. . . . . . . . . . . . . . . . . . . . . . . . . 10  
Routine Maintenance  
Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Drain Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
Service  
Pre-Installation Checks  
Prior to fully assembling and installing the ERS plenum  
cabinet and Vektor fan bypass plenum components,  
inspect plenums, coils, and fan assembly to make  
sure they are in working order.  
Storage  
When an ERS plenum cabinet is not going to be  
in service for an extended period of time, certain  
procedures should be followed to keep the plenum  
and coils in proper operating condition. Cover unit  
with tarp to protect from dirt and moisture.  
NOTE  
Do not use a black tarp as this will promote  
condensation.  
Coil Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Reference  
Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
ERS  
Plenum  
Cabinet  
Fan Bypass  
Air Plenum  
(BAP)  
Fan System Components  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
3
Check local codes to ensure compliance for all  
protective devices.  
Installation  
ERS plenum cabinets and fan bypass air plenums  
are to be rigged and moved by the lifting brackets  
provided. Handle  
in such a manner  
as to keep from  
ERS plenum cabinet with coil section should be lifted/  
hoisted by lifting brackets provided. These brackets  
are located around the lower perimeter of the plenum  
cabinet.  
1. Before lifting, be sure that all shipping material  
has been removed from unit.  
2. To assist in determining rigging requirements,  
weights are shown below.  
3. Unit must be lifted by the lifting brackets  
provided on base structure.  
4. Rigger to use suitable mating hardware to attach  
to unit lifting brackets.  
scratching or  
chipping the  
coating. Damaged  
finish may reduce  
ability of cabinet  
to resist corrosion.  
See coating repair  
section of this  
Fan Bypass  
Air Plenum  
Lift Points  
manual for details  
involving touch-  
up of damaged  
surfaces.  
5. Two spreader bars must span the unit to prevent  
damage to the cabinet by the lift cables.  
6. Always test-lift the unit to check for proper  
balance and rigging before hoisting to desired  
location.  
Top view of  
Bypass Air Plenum  
7. Never lift units in windy conditions.  
ERS Plenum Housing  
8. Preparation of curb and roof openings should be  
completed prior to lifting unit to the roof. Verify  
the curb has the gasket seal on the top surface.  
9. Do not use fork lifts for handling unit.  
Lifting Bracket  
(removable after  
installation)  
Unit Weights (ERS Plenum Section Only)  
Roof Curb  
Cabinet  
Size  
Cabinet  
Height  
Weight  
(lbs)*  
075  
090  
075  
090  
075  
090  
075  
090  
110  
3700  
4500  
4300  
4900  
5400  
6100  
6900  
7800  
8300  
020  
030  
040  
TOP VIEW  
of  
PLENUM SECTION  
Service  
Door  
Service  
Door  
060  
*Weights shown are for largest coil and filter  
options per cabinet size. Based on dry  
weight. Weights for custom designed units  
may vary.  
Service  
Door  
CAUTION  
When installing an ERS plenum cabinet, ensure  
the proper protective devices are used to protect  
personnel from moving parts and other hazards.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
4
Plenum Service Clearances and  
Access Locations  
NOTE  
Gasketing material (shipped with Vektor fan) should  
be placed on the top edge of secured roof curb  
prior to placing the ERS plenum cabinet and Vektor  
bypass air plenum on the curb.  
ERS plenum cabinet and Vektor fan bypass air plenum  
(BAP) require minimum clearances for access on three  
sides for routine maintenance. Filter replacement,  
drain pan inspection and cleaning, coil inspection,  
damper actuator adjustments and inspection, fan  
bearing lubrication and belt adjustment (belt drive  
units), are examples of routine maintenance that must  
be performed. Coil and filter sections are always  
provided with a service door or panel for proper  
component access. Clearances for component  
removal may be greater than the service clearances.  
Refer to page 12 for coil clearances.  
NOTE  
If fan bypass air plenum (BAP) is in sections, these  
should be assembled first, prior to connection to  
ERS plenum cabinet. Refer to Vektor Fan IOM (part  
number 464652) on how to assemble the fan BAP.  
Determine the placement of the plenum sections  
relative to each other. Please refer to the submittal  
drawing for the orientation of any bypass air plenum  
(BAP) dampers or air inlet locations.  
Side or Bottom Intake Opening  
Lift  
Bracket  
Filters  
2. Cut roof opening and locate curb  
Layout the unit roof openings such that exhaust  
inlet of the unit will line up with the corresponding  
ductwork (refer to Recommended Roof Openings  
on page 7). Do not make opening larger than  
necessary. Be sure to allow for the recommended  
service clearances.  
Coil  
Coil  
Service Doors  
Optional  
External  
Piping  
Internal Pipe  
Chase  
(by others)  
Optional  
Internal  
Piping  
(by others)  
under  
Vektor fans  
3. Install roof curbs  
Bypass  
Weatherhood(s)  
Locate curb over roof opening. Check that the  
diagonal dimensions are within 1⁄8 inch of each  
other and adjust as necessary. Shim as required  
to level. Secure curb to roof deck. Attach  
supplied gasketing to top of curb.  
Vektor bypass  
air plenum  
optional mounting  
locations shown  
4. Set the ERS plenum cabinet  
Assembly of Roof Curbs and ERS Plenum  
Cabinet to the Bypass Air Plenum (BAP)  
Rooftop units require curbs to be mounted first. The  
duct connections must be located so they will be clear  
of structural members of the building.  
Lift ERS plenum cabinet to a point directly above  
the curb and duct openings. While lowering,  
guide cabinet to align with duct opening. Roof  
curbs fit inside the unit base. Set ERS plenum  
cabinet into place on assembled VK-ERS roof  
curb. Allow gasketing on curb to compress before  
setting the fan bypass air plenum. Make sure the  
unit is properly seated on the curb and is level.  
1. Assemble factory supplied roof curbs  
Roof curbs are Model VK-ERS, which are shipped  
knocked down and require field assembly (by  
others). Assembly instructions are included with  
the roof curb.  
Gasketing material  
(supplied) to be  
attached to top edge  
of all curb sections  
Pre-installed  
gasket material  
ERS  
Plenum  
Cabinet  
Curb section  
for ERS plenum  
cabinet  
Roof Curb  
Curb section  
for Vektor fan  
bypass air  
plenum  
ERS Plenum Cabinet  
Installed on Roof Curb  
Anchor curb to roof deck structure in accordance  
with project construction documents.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
5
5. Set the Vektor fan bypass air plenum  
Inside the ERS plenum are slots along the  
marrying sections  
which accept the  
Before moving the Vektor fan BAP into position,  
gasketing must be installed to seal the plenum  
sections against leakage.  
bolt and washer  
assemblies. Using  
the hardware kit,  
attach the unit  
sections by bolting  
together frame  
extrusion from the  
inside.  
Slots  
around perimeter on  
each side of plenum  
Gasketing  
Slot Detail  
Gasketing  
Tighten the bolt-washer assemblies to the top  
and both sides of the joining sections. Start on  
the lower sides and work towards the top. As  
the bolts are tightened, the plenum sections  
will draw together. Use anti-seize gel to prevent  
galling / welding of all stainless steel fasteners.  
If necessary, pull the units together with a  
mechanical come-along device at the structural  
base of the unit or at lifting lugs.  
This  
gasketing is  
attached to the  
ERS plenum cabinet  
prior to shipment. Verify  
that it is in place and not  
damaged or missing prior to joining  
the two plenums together.  
External brackets, one for each side, transition  
and connect lower section of the bypass air  
plenum to the ERS cabinet. These brackets ship  
with the BAP and also complete the connection  
between the BAP and roof curb.  
The assembly  
hardware (stainless  
steel bolts) required  
to join the sections is  
located in the Vektor  
Assembly Hardware Kit  
Attach to fan bypass air  
plenum section  
5/16 - 18 UNC x 2-1/2 lag bolts  
5/16 inch flat washers  
1/2 inch flat washers  
3/4 inch flat washers  
fan bypass air plenum Quantities in hardware kit will vary  
accessory kit.  
Attach to ERS plenum  
section  
by unit size and configuration.  
Lift and set the Vektor fan BAP on the curb  
against the ERS plenum. Follow rigging and  
lifting instructions in the Vektor-MD installation  
instruction (part number 464652). Push fan bypass  
air plenum tight against ERS plenum, making sure  
to line up bolt holes. Be certain to compress foam  
gasket to form an airtight seal.  
Skirt Bracket  
After the ERS plenum and Vektor fan BAP are  
joined and secured, the Vektor fans can be set  
on the BAP. Refer to Vektor Fan installation  
instruction (part number 464652) on this  
procedure.  
Push  
Plenum  
Installation  
ERS  
Plenum  
Cabinet  
Fan Bypass  
Air Plenum  
(BAP)  
Installations with inlet configurations that deviate from  
this standard may result in reduced fan performance.  
Restricted or unstable flow at the fan inlet can cause  
pre-rotation of incoming air or uneven loading of the  
fan wheel yielding large system losses and increased  
sound levels.  
Roof Curb  
Vektor Riser Installation  
ERS and Vektor Fan Bypass Plenum  
Assembly Installed on Roof Curb  
Check curb or structural supports for levelness. Both  
must be level to ensure proper drainage from plenum  
and fan(s).  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
6
 
Duct Connections  
Duct Connections  
Installation of all ducts should be done in accordance  
with SMACNA and AMCA guidelines.  
Plenum Bottom Inlet Opening  
Connect primary exhaust air ducts to unit using  
flanged connections. Screw ducts directly to unit  
using stainless steel self-tapping sheet metal screws.  
Contractor is responsible for providing transitions  
to accommodate difference in sizing between unit  
and building ducts. Duct connections to collar-type  
openings can be made with S-cleats or overlapping  
joints. Apply caulking around the duct connection.  
Failure to ensure a tight fit and properly seal duct  
connections can cause air leakage and system  
performance problems from the contaminated  
airstream.  
Length  
Width  
Service  
Door  
Service  
Door  
Service  
Door  
Bottom Inlet  
Cabinet  
Length  
Width  
Energy Recovery Cabinet  
Size  
020  
030  
040  
060  
(inches)  
(inches)  
86  
25  
25  
25  
25  
120  
172  
236  
Contractor  
Installed  
Ductwork  
Curb  
Plenum Side Inlet Duct Dimension  
Roof Deck  
Energy Recovery Cabinet  
Height  
Contr actor  
Installed  
Ductwork  
Length  
Curb  
Cabinet  
Size  
Length  
(inches)  
Height  
(inches)  
Roof Deck  
020  
030  
040  
060  
86  
30  
30  
30  
30  
Plenum Side Inlet  
120  
172  
236  
Gasket or Sealant  
(by others)  
Contractor  
Installed  
Ductwork  
Screws  
(by others)  
Gasket or Sealant  
(by others)  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
7
Drain Trap  
Coils  
Coils are provided with a stainless steel drain pan  
with 1 1/4-inch male NPT drain connection. A drain  
trap must be connected to the drain connection to  
allow excess water to flow out of the drain pan. More  
importantly though, due to the negative internal static  
pressure of the coil compartment, installing the drain  
trap prevents outdoor air from being pulled into the  
drain pan and consequently forcing water out of the  
pan and into the unit.  
Installation of Water Coil Piping  
Guidelines for the installation of the coil have been  
provided to ensure proper performance of the coils  
and their longevity. These are general guidelines  
that may have to be tailored to meet the specific  
requirements of any one job. As always, a qualified  
party or individual should perform the installation and  
maintenance of the coil. Protective equipment such  
as safety glasses, steel toe boots and gloves are  
recommended during the installation and maintenance  
of the coil.  
To ensure the drain trap works properly, the trap  
height must account for the difference in static  
pressure between ambient conditions outside the  
unit and the internal negative pressure of the coil  
compartment.  
All field piping must be self-supporting. System piping  
should be flexible enough to allow for the thermal  
expansion and contraction of the coil.  
Refer to local codes to determine drainage  
requirements. If draining onto roof, place a drip pan  
below drain to protect roof. If draining onto roof is  
not acceptable, a drain line must be attached to the  
trap. The drain line must be pitched away from the  
unit at least 1/8-in. per foot. On longer runs, an air  
break should be used to ensure proper drainage.  
Local codes may require drainage into a waste water  
system.  
Water Coil Installation Recommendations  
1. Piping should be in accordance with accepted  
industry standards. Always use a back up wrench  
on the coil connections when attaching the piping  
to the coil if pipe thread connections are utilized.  
2. Connect the water supply to the bottom  
connection on the air leaving side and the water  
return to the top connection on the air entering  
side.  
3. The air vent at the uppermost point should be  
temporarily opened during system start-up to  
release all of the air from the coil. To maintain  
heat transfer capacity, periodically vent any air in  
the coil.  
4. Water coils are not normally recommended for  
use with entering air temperatures below 40°F.  
Glycol solutions or brines are the only freeze-safe  
media for operation of water coils for low entering  
air conditions.  
Drainage problems not only occur from improper drain  
trap design, but also from lack of maintenance of  
the cooling coil compartment. Algae can form in the  
drain pan and trap  
1¼ inch minimum  
and cause reduced  
water flow, which can  
result in backup into  
the system. Regular  
maintenance will  
TSP  
H/2  
prevent this from  
occurring. If the  
drains have a clean-  
out opening, be sure  
to close the opening  
after cleaning.  
5. Two position control valves, modulating valves,  
three way valves or a combination of these  
controls can accomplish control of water coils.  
Follow the recommendations of the control  
manufacturer regarding types, sizing and  
locations. Face and bypass dampers may also  
be used, but do not close off tightly. Air leakage  
in cooling applications has no appreciable  
affect. In heating applications, however, the air  
temperature may rise several degrees and should  
be considered in system design. Low leakage  
dampers may be required.  
TSP = Total Static Pressure  
H = TSP + 1¼ inch minimum  
NOTE  
A conservative method of trap design is to add  
1-1/4 inches minimum to total static pressure.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
8
Filter Replacement  
Filters are located only in the coil plenum section.  
Access is needed from both sides of the plenum to  
change all the filters. Unit may have either 2 inch  
MERV 8 filters or 4 inch MERV 11 filters depending on  
the application requirements. Use equivalent MERV  
rating filters when replacing.  
RETURN  
Airflow  
RETURN  
Airflow  
SUPPLY  
SUPPLY  
Change the filters regularly. Pressure drop readings  
can be used to determine when a filter should be  
replaced. Prefilters should be replaced at filter  
manufacturers recommended pressure drop change  
out or as required by system design.  
External Pipe  
Connection  
External Pipe  
Connection  
All filter sections have access provided by a door.  
Filters used in Greenheck ERS plenums can be  
changed in most cases by sliding them out and  
replacing. In some cases, filters are secured to frames  
using a clip.  
Internal  
Pipe  
Chase  
Internal  
Pipe  
Chase  
6. Pipe sizes for the system must be selected on the  
basis of the head [pressure] available from the  
circulating pump.  
7. Internal coil plumbing. Under each fan there is  
a raised, insulated cover panel to be used when  
internal pipe connections are desired. Either  
remove this panel to run plumbing or punch  
appropriately sized holes in the panel to allow  
piping to pass without rubbing and space for  
piping insulation, sealant and grommets (by  
others).  
NOTE  
Vent and drain connections are provided on  
Greenheck water coils unless otherwise specified.  
This allows the coils to be drained. Keep in mind  
that when draining the coils, all water may not drain  
from the coil. In order to completely drain the coil  
to prevent the possibility of freezing during cold  
ambient temperatures, air or nitrogen pressure must  
be utilized to blow any remaining water from the  
coil.  
Coil Installation Checklist  
Use the following checklist to verify that all necessary  
installation procedures have been completed.  
1. Coils are installed with airflow in same direction  
as indicated on the coil nameplate or casing.  
2. Condensate drain pans and piping is installed  
with a trap in the condensate line and piping is  
insulated and heated if installed in applications  
that are below freezing.  
3. Clean filters are installed upstream.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
9
Vektor Field Coating Touch-up Procedure  
for Scratched Areas  
Standard coating and color for the Vektor laboratory  
exhaust system is Greenheck’s LabCoat™ – Industrial  
Gray (041).  
Optional Accessories  
Dirty Filter Sensor (Magnehelic Gauge)  
Dirty filter sensor monitors pressure drop across the  
exhaust air filters. Visual gauge on the side of the  
plenum cabinet indicates the pressure across the filter  
section. Periodic inspection is necessary to determine  
whether filters need to be replaced.  
The procedure below details the correct method for  
repairing minor scratches in the coating.  
Repair Kit Contents  
Vapor Tight Lights  
1 pint Kem Kromik primer with MSDS  
1 pint Industrial Gray (041) enamel with  
Material Data Safety Sheet  
4 disposable foam brushes  
1 sheet of sandpaper  
2 technical data sheets for the two pints  
1 repair procedure  
Vapor tight lights provide light to each of the  
compartments in the energy recovery plenum. The  
lights are wired to a junction box mounted on the  
outside of the unit. The switch requires a separate  
power source to allow for power to the lights when the  
unit main disconnect is off for servicing.  
Electrical Package  
The electrical package consists of a switch and GFCI  
receptor mounted in a two gang, “in use” NEMA-  
3R rated box with cover plate. This box would be  
mounted at the factory near the ERS plenum access  
doors.  
1. Scuff affected area to be repaired using medium  
sandpaper (provided) or medium Scotch Brite™  
pad. Feather the edges.  
2. Clean affected area to be touched up using an  
alkaline based cleaner and rinse.  
The GFCI is rated for 15A, 125VAC and is provided  
with SafeLock™ Protection. This feature denies  
power if the GFCI is incorrectly wired or if the GFCI  
is damaged and protection is lost. The GFCI is also  
equipped with a trip indicator light to easily identify  
tripped condition. Receptor uses a NEMA 5-15 R  
configuration.  
3. Apply Kem Kromik primer using 1 inch foam  
brush (provided). Follow technical data sheet  
instructions.  
4. Allow primer to dry a minimum of 2 1/2 hours  
before top coating.  
5. Topcoat with Industrial enamel using 1 inch foam  
brush (provided). Follow technical data sheets  
instructions. Allow painted units to air-dry and  
cure before putting into service. See Technical  
Data sheets for detailed drying and cure  
Supplied switch is industrial extra heavy duty grade  
with back and side wiring. The switch has a rating of  
20A, 120/277VAC and single pole. The switch comes  
from the factory pre-wired to lights within ERS plenum  
section.  
schedules at different temperatures.  
To order coating repair kits, please reference  
Greenheck’s part number HAZ2037 HI-PRO GRAY  
FIELD DAMAGE REPAIR KIT. Please contact factory  
with your fan’s serial number for colors other than our  
standard Industrial Gray (041).  
Electrical wiring for power to the electrical panel is to  
be installed by a licensed electrician in compliance  
with all local and national codes.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
10  
 
Fin Straightening  
Routine Maintenance  
Coil fins may have been bent during shipping or  
servicing, and should be straightened to maintain  
maximum heat transfer. Reduction of the effective  
coil surface will correspondingly reduce coil capacity.  
Always check fin appearance after any handling of the  
coil and after any servicing is done near the coils. Fin  
combs are sized according to number of fins per inch  
of the coil. For relatively small bends that require only  
minor repair, other tools may be used to evenly space  
the fins. Be careful not to damage the coils.  
CAUTION  
Use caution when removing access panels or other  
unit components, especially while standing on a  
ladder or other potentially unsteady base. Access  
panels and unit components can be heavy and  
serious injury may occur.  
Once the unit has been put into operation, a routine  
maintenance program should be set up to preserve  
reliability and performance. Items to be included in  
this program are:  
Winterizing Coils  
During any extended down time, all water should  
be drained from the coil. The coil should then be  
thoroughly flushed with a glycol solution to prevent  
freeze damage.  
• Internal Filter  
Check for cleanliness. Replace if required.  
• Door Seal  
Check if intact and pliable.  
• Coil Maintenance  
Filters  
Check for cleanliness (coil and drain pan).  
• Winterizing Coils  
Filters upstream of the coil should be checked  
regularly for dirtiness and clogging. If the filters are  
dirty, they should be replaced. It is important that the  
coils stay clean to maintain maximum heat transfer  
capability.  
Drain. Fill with antifreeze. Drain.  
Coil Maintenance:  
Cleaning  
Drain Pan  
Drain pans may contain moisture; therefore, algae and  
other organisms will grow due to airborne spores and  
bacteria. Scheduled cleaning is necessary to prevent  
build-up from clogging the drain. Drain pans should  
also be kept clean to prevent growth of bacteria and  
the spread of disease.  
Coils should be kept clean to maintain maximum  
performance. For operation at its highest efficiency,  
the coil should be cleaned often during periods  
of high cooling demand or when dirty conditions  
prevail. Power should be disconnected and locked  
out and motors should be covered to insure that no  
moisture penetrates into the windings causing motor  
failure if applicable. Remove large debris from the  
coils and straighten fins before cleaning. Clean coils  
with cold water and detergent or with one of the  
commercially available chemical coil cleaners. Rinse  
coils thoroughly after cleaning. For coils with fragile  
fins or high fin density, foaming chemical sprays and  
washes air available. Many coil cleaners contain  
harsh chemicals, so they must be used with caution  
by qualified personnel only. Care must be taken not  
to damage the coils. FINS ARE SHARP! Use caution  
when working with coils.  
WARNING  
Biological Hazard! All drain pans and coils should  
be cleaned on a regular schedule by qualified  
personnel to prevent the growth of bacteria.  
CAUTION  
Do not use acidic chemical coil cleaners. Do not use  
alkaline chemical coil cleaners that, after mixing,  
have a ph value greater than 8.5 without also using  
an aluminum corrosion inhibitor in the cleaning  
solution. Failure to follow these guidelines or the  
manufacturer’s instructions for use of cleaning  
chemicals could result in damage to the unit.  
Vektor ERS-MD Energy Recovery Plenum Laboratory Exhaust  
 
11  
Service  
Maintenance Log  
Coil Change Out Procedure  
Date __________________ Time _____________ AM/PM  
Notes:___________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
Coils can only be pulled out through the side of the  
plenum cabinet. Side panels which are nearest to the  
coil can be removed if the coil needs to be replaced.  
Size 020 ERS plenums only have a single coil and do  
not require coil removal clearances on both sides. If  
necessary, both coils can be removed through the  
same side of the plenum housing. This process would  
require the removal of an additional spacer panel that  
separates the two coils within the unit.  
Date __________________ Time _____________ AM/PM  
Notes:___________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
Cabinet  
Size  
Minimum Clearance  
(inches)  
020  
030  
040  
060  
114  
74 (each side)  
100 (each side)  
132 (each side)  
Date __________________ Time _____________ AM/PM  
Notes:___________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
Service Doors  
Coil Service  
Clearance  
Coil Service  
Clearance  
Coil  
Coil  
Date __________________ Time _____________ AM/PM  
Notes:___________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
_________________________________________________  
Warranty  
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from  
the shipment date. Any units or parts which prove defective during the warranty period will be replaced at our option  
when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer for a period of  
one year. Should motors furnished by Greenheck prove defective during this period, they should be returned to the  
nearest authorized motor service station. Greenheck will not be responsible for any removal or installation costs.  
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications  
without notice.  
Greenheck Catalog Vektor ERS-MD provides additional  
information describing the equipment, fan performance,  
available accessories, and specification data.  
AMCA Publication 410-96, Safety Practices for Users and  
Installers of Industrial and Commercial Fans, provides  
additional safety information. This publication can be  
®
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected]Website: www.greenheck.com  
474118 • Model VKERS-MD IOM, Rev. 1, April 2011  
Copyright 2011 © Greenheck Fan Corp.  
12  
 

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