Venmar HR 2.5 Specifications

ERV Vertical Unit Ventilators
Classroom Ventilators with Energy Recovery
Installation, Operation and Maintenance Instructions Manual
Capacity: 800 to 2,000 cfm
Model: ERV1100w, ERV2000w with WSHP, Electric
or Hydronic Heating
©2006 Venmar CES Inc.
Table of Contents
Nomenclature.......................................................................................................................................................................3
Safety Considerations..........................................................................................................................................................5
Specifications........................................................................................................................................................................5
Installation............................................................................................................................................................................6
Rough In.........................................................................................................................................................................6
Power..............................................................................................................................................................................6
Controls..........................................................................................................................................................................7
Balancing........................................................................................................................................................................8
System Operation.................................................................................................................................................................8
Sequence of Operation..................................................................................................................................................8
Ventilation......................................................................................................................................................................8
Mode Cooling.................................................................................................................................................................8
Recirculation Control.....................................................................................................................................................9
Frost Control...................................................................................................................................................................9
System Service......................................................................................................................................................................9
Monthly Maintenance...................................................................................................................................................9
Annual Maintenance...................................................................................................................................................10
Appendix A: Unit Dimensions...........................................................................................................................................11
Appendix B: Plenum Dimensions......................................................................................................................................13
Appendix C: Airflow Performance Data...........................................................................................................................15
Appendix D: Electrical Data...............................................................................................................................................19
Appendix E: Remote Occupant Interface.........................................................................................................................21
Appendix F: DDC Keypad Reference Guide......................................................................................................................22
Appendix G: Start-up and Troubleshooting.....................................................................................................................24
Appendix H: ERV1100w and ERV2000w Start-up Report................................................................................................26
Appendix I: ECM Motor CFM Adjustment Procedure......................................................................................................27
©Venmar CES Inc. 2012. All rights reserved throughout the world.
Illustrations cover the general appearance of Venmar CES products at the time of publication and Venmar CES reserves the
right to make changes in design and construction at any time without notice.
CES Group, LLC d/b/a Venmar CES furnishes equipment pursuant to its then-current Terms and Conditions of Sale and Limited Warranty, copies of which can be found under the Terms & Conditions of Sale and Warranty link at www.ces-group.com.
Extended warranties, if any, shall be as offered and acknowledged in writing by Venmar CES.
Manufacturer reserves the right to discontinue or change specifications or designs without notice or obligation.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
2
Nomenclature
ERV1100w Nomenclature (1,100 cfm nominal)
1
2
3
4
5
6
7
8
9
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention3
N – Non-defrost
2. VOLTAGE/SPEED
A – 120/1/60 – two-speed4
B – 208/120/1/60 – two-speed5
C – 230/120/1/60 – two-speed5
D – 208/3/60 – two-speed6
E – 230/3/60 – two-speed6
F – 460/3/60 – two-speed6
3. HEATING
E – Electric heat
H – Hot water
M – High efficiency gas, modulating4/7
T – High efficiency gas, two-stage4/7
P – Proportional electric heat8
R – Hot gas reheat, on/off9/10
S – Hot gas reheat, modulating9/10
X – No heat
4. HEATING CAPACITY
A – No heat
Electric Options
B – 2.5 kW (one-stage)7
C – 5.0 kW (one-stage)11
D – 5.0 kw (two-stage)7
P – 7.5 kW (one-stage)12
E – 7.5 kW (two-stage)7
Q – 10.0 kW (one-stage)12
F – 10.0 kW (two-stage)7
R – 12.5 kW (one-stage)12
Hot Water Options
I – 50–70 MBH
Hot Gas Reheat Options
M – 30–40 MBH9
Gas Options
J – 40 MBH7
K – 60 MBH7
5. GAS TYPE
G – Natural gas
L – Propane gas (CAN)
P – Propane gas (US)
X – Not applicable
6. COOLING
C – Chilled water6/13
E – Chilled water with condensate pump6/13
Split System
D – Dx coil only14
F – Dx coil with condensate pump14
Integrated System
H – Copper, WSHP6
K – Copper with condensate pump, WSHP6
N – Cupro-nickel, WSHP6
P – Cupro-nickel with condensate pump, WSHP6
V – Condensate pump only, for gas heat
X – No Cooling
Notes:
1 When ordering recirc defrost, you must order an exhaust air damper.
2 An outside air damper must be selected.
3 Not available with two-stage compressors.
4 Not available with WSHP (water source heat pump) or electric heat options.
5 Requires a neutral wire with L1 and L2.
6 Not available with gas heating options.
7 Not available with three-phase voltage.
8 First stage is proportional and second stage (if applied) is fixed.
9 Only available with WSHP (water source heat pump) options.
10 Not available with controls option ‘D – Stand alone DDC controls’.
11 Not available with 460/3/60.
12 Not available with single-phase voltage: 208/120/1 and 230/120/1.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
10
11
12
13
14 15
16
17
17. FREE COOLING
F – Free cooling21
X – No free cooling
16. VALVES
A – Basic valve kit9/19
B – Motorized on/off9/19
C – Motorized on/off, automatic
flow rate control9/19
D – On/off zone, automatic
flow rate control9/19
E – Automatic flow rate control9/19
F – No valves, flexible hose kit only9
X – Not applicable20
15. COOLING CAPACITY
A – 2.0 ton
B – 2.5 ton
C – 3.0 ton
D – 3.5 ton14
H – 2.5 ton, two-stage18
J – 3.0 ton, two-stage7/18
K – 3.5 ton, two-stage18
X – Not applicable
14. REFRIGERANT
B – R410a
X – Not applicable
13. ENERGY RECOVERY
1 – Aluminum wheel, no purge
12. EXTERNAL DISCONNECT
N – Non-fused disconnect switch17
X – No disconnect switch
11. RETURN AIR DAMPER
1 – Motorized
2 – Spring return
10. EXHAUST AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – No damper16
9. OUTSIDE AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – Insulated modulating spring return
4 – No damper16
8. SUPPLY DISCHARGE
T – Top plenum, no grille15
G – Top plenum, c/w grille15
D – Top plenum, c/w double
deflection grille
S – Silencer plenum, c/w grille15
X – No top plenum
7. CONTROLS
D – Stand alone DDC controls
R – Stand alone DDC controls with
remote occupant interface
X – No controls - field provided low
voltage sequencing required
13 Chilled water coil available with 3.0 ton capacities only.
14 Dx ‘A’ coils available with 2.0, 2.5 and 3.0 ton – 13 SEER. Not available for
3.5 ton option.
15 Not available with gas and does not allow top access for electrical or pipe routing.
16 Non-defrost only.
17 Non-fused disconnect switch is field installed (remote mounted).
18 Available with R410a WSHP (water source heat pump).
19 Option includes: ball valve, blowdown valve, strainer and p/t port.
20 Not available with WSHP (water source heat pump).
21 Supply and exhaust airflows will be unbalanced. Free cooling is not available with
gas heating or hot gas reheat.
3
ERV2000w Nomenclature (2,000 cfm nominal)
1
2
3
4
5
6
7
8
9
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention3
N – Non-defrost
2. VOLTAGE/SPEED
A – 120/1/60 – two-speed4
B – 208/120/1/60 – two-speed5
C – 230/120/1/30 – two-speed5
D – 208/3/60 – two-speed
E – 230/3/60 – two-speed
F – 460/3/60 – two-speed
3. HEATING
E – Electric heat
H – Hot water
P – Proportional electric heat6
R – Hot gas reheat, on/off7/8
S – Hot gas reheat, modulating7/8
X – No heat
4. HEATING CAPACITY
A – No heat
Electric Options
B – 2.5 kW (one-stage)9
C – 5.0 kW (one-stage)10
D – 5.0 kw (two-stage)9
P – 7.5 kW (one-stage)11
E – 7.5 kW (two-stage)9
Q – 10.0 kW (one-stage)11
F – 10.0 kW (two-stage)9
R – 12.5 kW (one-stage)11
Hot Water Options
I – 60–90 MBH
Hot Gas Reheat Options
M – 40–50 MBH7
5. GAS TYPE
X – Not applicable
6. COOLING
C – Chilled water12
E – Chilled water with condensate pump12
Split System
D – Dx coil only13
F – Dx coil with condensate pump13
Integrated System
H – Copper, WSHP
K – Copper with condensate pump, WSHP
N – Cupro-nickel, WSHP
P – Cupro-nickel with condensate pump, WSHP
X – No Cooling
7. CONTROLS
D – Stand alone DDC controls
R – Stand alone DDC controls with remote
occupant interface
X – No controls - field provided low voltage
sequencing required
Notes:
1 When ordering recirc defrost, you must order an exhaust air damper.
2 An outside air damper must be selected.
3 Not available with two-stage compressors.
4 Not available with WSHP (water source heat pump) or electric heat options.
5 Requires a neutral wire L1 and L2.
6 First stage is proportional and second stage (if applied) is fixed.
7 Only available with WSHP (water source heat pump) options.
8 Not available with controls option ‘D – Stand alone DDC controls’.
9 Not available with three-phase voltage.
10 Not available with 460/3/60.
11 Not available with single-phase voltage: 208/120/1 and 230/120/1.
12 Chilled water coil available with 3.0 and 5.0 ton capacities.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
10
11
12
13
14 15
16
17
17. FREE COOLING
F – Free cooling20
X – No free cooling
16. VALVES
A – Basic valve kit7/18
B – Motorized on/off7/18
C – Motorized on/off, automatic
flow rate control7/18
D – On/off zone, automatic
flow rate control7/18
E – Automatic flow rate control7/18
F – No valves, flexible hose kit only7
X – Not applicable19
15. COOLING CAPACITY
C – 3.0 ton
D – 3.5 ton13
E – 4.0 ton
F – 5.0 ton
J – 3.0 ton, two-stage9/17
K – 3.5 ton, two-stage17
M – 4.0 ton, two-stage17
X – Not applicable
14. REFRIGERANT
B – R410a
X – Not applicable
13. ENERGY RECOVERY
1 – Aluminum wheel, no purge
12. EXTERNAL DISCONNECT
N – Non-fused disconnect switch16
X – No disconnect switch
11. RETURN AIR DAMPER
1 – Motorized
2 – Spring return
10. EXHAUST AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – No damper15
9. OUTSIDE AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – Insulated modulating spring return
4 – No damper15
8. SUPPLY DISCHARGE
T – Top plenum, no grille14
G – Top plenum, c/w grille14
D – Top plenum, c/w double
deflection grille
S – Silencer plenum, c/w grille14
X – No top plenum
13 Dx ‘A’ coils available with 3.0 and 4.0 ton – 13 SEER. Not available for 3.5 ton
option. Contact factory for information on 5.0 ton – 13 SEER coil.
14 Not available with gas and does not allow top access for electrical or pipe routing.
15 Non-defrost only.
16 Non-fused disconnect switch is field installed (remote mounted).
17 Available with R410a WSHP (water source heat pump) only.
18 Option includes: ball valve, blowdown valve, strainer and p/t port.
19 Not available with WSHP (water source heat pump).
20 Supply and exhaust airflows will be unbalanced. Free cooling not available with
hot gas reheat.
4
Safety Considerations
Warning, Caution and Important notes appear throughout this manual in specific and appropriate locations to
alert Installing Contractors and maintenance or service
personnel of potential safety hazards, possible equipment
damage or to alert personnel of special procedures or instructions that must be followed as outlined below.
!
WARNING
Identifies an instruction which, if not followed, might cause
serious personal injuries including possibility of death.
CAUTION
Identifies an instruction which, if not followed, might severely damage the unit, its components, the assembly or
final installation.
IMPORTANT
Indicates supplementary information needed to fully
complete an instruction or installation.
Hazards may exist within this equipment because it contains electrical and powerful moving components. Only
qualified service personnel should install or service this
equipment. Untrained personnel can perform basic maintenance such as maintaining filters. Observe precautions
marked in literature and on labels attached to unit. Follow
all safety codes.
!
WARNING
Disconnect the main power switch to the unit before
performing service or maintenance procedures. Electric
shock can cause personal injury.
Specifications
The Vertical Unit Ventilator (VUV) series is one of the
successful solutions to ventilation and indoor air quality
problems from Venmar CES. This series consists of commercial heat and energy recovery ventilators with heating
and/or cooling. Designed as appliances, they are ideally
suited as complete classroom ventilators. With an upright
configuration and small footprint, they require a minimum
amount of space for installation. An optional top supply
plenum allows for flexibility to suit various installations.
The cabinet is well insulated and tightly sealed to provide
quiet operation.
•
Electric Heat Option
•
•
Case
•
•
•
•
•
0.04” [1 mm] pre-finished steel
Heavy gauge pre-finished steel
Smooth texture
Bone white finish
Heavy gauge internal framework
Unit Dimensions
•
See Appendix A for ERV1100w and ERV2000w.
Plenum Dimension Drawings
•
•
•
•
•
Energy Recovery Module
•
Aluminum enthalpy wheel
Filtration – Supply, Exhaust and Return Air
•
ERV1100w: 2” [51 mm] MEF disposable filter 12” x
24” [305 x 610 mm] standard outdoor air and 16” x
16” x 2” [406 x 406 x 51 mm]
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Aluminum hot water coil
Control valve is field installed
ERV1100w: 50,000 to 70,000 Btu/hr [14.6 to 20.5 kW]
ERV2000w: 60,000 to 90,000 Btu/hr [17.5 to 26.3 kW]
Proportional Electric Heat Option
•
See Appendix B for ERV1100w and ERV2000w.
See Appendix C for ERV1100w and ERV2000w.
Open coil electric resistance elements
Two-stage operation:
–– Stage one
2.5 to 5.0 kW – 208–230V, one-phase, 60 Hz
5.0 to 12.5 kW – 208–203V, three-phase, 60 Hz
7.5 to 12.5 kW – 460V, three-phase, 60 Hz
–– Stage two
2.5 to 10.0 kW – 208–230V, one-phase, 60 Hz
Hot Water Heating Option
Airflow Performance Data
•
ERV2000w: 2” [51 mm] MEF disposable filter 12” x
24” [305 x 610 mm] standard outdoor air and 20” x
20” x 2” [508 x 508 x 51 mm]
•
Stage one
–– 2.5 to 5.0 kW – 208–230V, one-phase, 60 Hz
–– Proportional control
5.0 to 12.5 kW 208–230V, three-phase, 60 Hz
7.5 to 12.5 kW 460V, three-phase, 60 Hz
Stage two
–– 2.5 to 10.0 kW – 208–230V, one-phase, 60 Hz
Hot Gas Reheat Option
•
•
•
Aluminum fin reheat coil
ERV1100w: 30,000 to 40,000 Btu/hr [8.8 to 11.7 kW]
ERV2000w: 40,000 to 50,000 Btu/hr [11.7 to 14.6 kW]
5
Installation
Rough In
The wallmount ventilator must be installed on a level base.
Refer to Appendix A dimensions. Zero clearance is allowed
between the bottom of the unit and any combustible material.
Unit Installed without Top Plenum
The supply air ducting must be connected to the supply collar and constructed so that there are no openings
within 30” [762 mm] of the electric heating elements.
Openings within 30” [762 mm] of the elements must be
fitted with a permanent, non-removable protective screening. Zero clearance is required between the supply duct
and any combustible material.
A water trap is provided in the drain line to prevent back
flow of sewer gases. The drain must be installed in an area
in which it will not freeze.
Water Supply
Never operate the heat pump without water flowing
through its water-to-refrigerant heat exchanger coil; doing
so would cause severe damage to the unit. For proper
water flow rates, refer to the unit Product Data Manual.
Drainage
Units equipped with air conditioning have a condensate
line connected to the drain pan which drains out the back
of the unit. Drain connections within the case are accessible by removing the access doors.
Power
!
WARNING
Ensure that the power disconnect switch is off before
connecting power to the unit or working with high voltage lines.
A sealed strain relief clamp (supplied by the Installer) must
be fitted into the case to accommodate a power line
connection (see Appendix A for knock-out location). If
a sealed clamp cannot be used, the hole must be sealed
with silicone or an equivalent water/air-tight sealant.
Power must be connected to the unit through a fused
disconnect switch (factory supplied option, field installed).
If the unit has a top supply plenum, a hole for the power
must be field drilled in the plenum to accommodate the
main power in.
Terminals for line connection are located in the control
box within the wallmount ventilator and are labeled as
shown below. Connections are illustrated in Appendix E.
Line connection to 120 VAC, 60 Hz is possible for units
with hydronic heating or no heat options:
Table 2: Line Connection to 120 VAC, 60 Hz for Hydronic
Heating or No Heat
L1
Hot
N
Neutral
GND
Ground
Three-phase
Line connection to 208, 230 or 460 VAC, three-phase,
60 Hz:
Table 3: Line Connection to 208, 230 or 460 VAC, Threephase, 60 Hz
L1
Hot
L2
Hot
L3
Hot
GND
Ground
Single-phase
Line connection to 208 or 230 VAC, single-phase, 60 Hz
for electric heat units:
Table 1: Line Connection to 208 or 230 VAC, Singlephase, 60 Hz for Electric Heat Units
L1
Hot
L2
Hot
N
Neutral
GND
Ground
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Electrical connections must be made in accordance with all
applicable local codes and ordinances and with the current
revision of the National Electric Code (ANSI/NFPA 70).
For more information on electrical data, see Appendix D.
6
Controls
The wall units contain a stand alone controls package consisting of either a Direct Digital Controller (DDC) system or
an optional no controls package for field installation and
controls. The DDC system allows the units to operate in either a stand alone capacity or in conjunction with numerous units via a field provided networking system.
Stand Alone Controls (DDC)
The mainframe for the stand alone DDC system is the programmable DSC-T305 controller/keypad. The DSC-T305
functions as a digital controller, LCD display for visual reference and as a 16-button keypad for user access to change
operation parameters or to complete unit diagnostics. This
controller is located within the unit and therefore can only
be accessed by opening the front door of the unit.
The DDC controller/keypad also may interface to expander
modules (within the control box) to expand the input
and output (IO) capabilities of the entire control system.
Expander modules are deemed necessary based upon the
requirements of the controls sequence.
Heating
icon
Cooling
icon
Time
of day
Current
temperature
face option, a 10K thermistor is connected to the terminal strip to provide the controller with the current room
temperature. Refer to Appendix E for the wiring diagram
of both the remote occupant interface and room sensor.
Refer to the Sequence of Operation section for general
operation of the remote occupant interface (BacStat II)
keypad.
The remote occupant interface will allow a room occupant
to adjust the room setpoint temperature and manually
place the unit into occupancy override mode. By pressing
the ‘On’ button, this mode can be obtained for durations
of 60, 120 or 180 minutes. Pressing the ‘On’ button a
fourth time will exit the occupancy override mode.
Room Temperature Sensor Wiring
Table 4: BacStat II Connections to Terminal Strip
BacStat II Sensor
24 VAC
GND
+
−
Wired to
Wired to
Wired to
Wired to
Terminal Strip
PWR 24V
COM
NET +
NET −
Without the BacStat II option, the room temperature is
provided to the DDC controller via the wiring of a 10K
thermistor. This thermistor must be connected to the terminal strip using a two-conductor shield cable, wiring one
wire to the terminal ‘10K thermistor 1’ and the other to
the terminal ‘10K thermistor 2’ (see Appendix E).
No Controls – Field Provided Low Voltage
(Sequencing Required)
Status
message
Occupancy
icon
Supply fan
level
Figure 1: DSC-T305 controller display
IMPORTANT
For complete unit setup/configuration of the DDC controller system and outline of the troubleshooting guide,
refer to the basic guide in Appendix F and the Sequence
of Operation section for the DDC keypad operation. This
guide is also placed within the unit for a more accurate
description of the programmed parameters.
The default four-digit ‘Pin’ password for access to the
DDC menus is “4321”.
Remote Occupant Interface (BacStat II)
To provide remote monitoring and access of certain temperature setpoints and occupancy override features, a remote occupant interface option is available.
This interface is referred to as the BacStat II and is connected to the DDC (DSC-T305) controller via the terminal
strip within the unit. Without the remote occupant interVCES-VUV-IOM-4B – ERV1100w & ERV2000w
A no controls package could be supplied to enable the
end user to field supply and install a custom control system. In this application, the unit would contain the factory
wiring and installation of basic electrical components such
as damper relays, fan relays, electric heat contactors, low
voltage transformer and standard terminals and connectors.
General Wiring
Auxiliary heating (non-heat pump or electric units), auxiliary cooling (non-heat pump units) and 24 VAC connections are available for field wiring on the unit terminal
strip. Each of the auxiliary terminals provide 24 VAC during the applicable stage (ex. 24 VAC on auxiliary cooling
terminal during cooling modes) while the 24 VAC terminals provide approximately 30 VA of power output.
!
WARNING
Installation and operation of field supplied controls must
provide the correct designed operation criteria of the unit.
Incorrect unit operation could void the warranty of certain
unit components and/or result in complete unit failure.
7
Balancing
Once installed, the unit must operate with balanced
ventilation. Balanced ventilation is achieved by obtaining
equal rates of outdoor and exhaust airflow. Airflow may
be adjusted by balancing dampers (supplied by Installer)
within the ductwork. Outdoor air volumes can be adjusted
by changing the maximum open position on the opposed
blade outdoor air damper. Supply airflow can be adjusted
on both low and high speed using the ECM motor cfm adjustment procedure in Appendix H.
Systems not operating with balanced airflow will not have
effective energy recovery. Performance of the energy recovery module will be reduced and freezing may occur
with cold outside air temperatures, resulting in blockage
of the energy recovery module.
System Operation
Sequence of Operation
Many parameters on the DDC controller may be adjusted
to alter the durations and setpoints of the sequence of operation of the wall unit. Refer to Appendix F and the Controls section for more specific details of each parameter.
DDC Controller/Keypad (DSC-T305)
Remote Occupant Interface (BacStat II) Keypad
Table 6: Remote Occupant Interface (BacStat II) Keypad
Symbol
Table 5: DDC Controller/Keypad (DSC-T305)
Symbol
Key Name
Description
Thermometer key
Used to display the room
setpoint.
Clock key
Used to display the time
and date.
Schedule key
Used to display ‘On’ and
‘Off’ times.
Occupancy key
Used to initiate manual occupancy.
Parameter keys
Used to cycle through
parameters.
Increment keys
Used to increase or decrease values.
Key Name
Description
Increment keys
Used to increase or decrease values.
Heating/Cooling Operation
First/Second Stage Heating
•
•
24 VAC on auxiliary heating terminal.
Supply fan to low speed.
First Stage Cooling (Free Cooling)
•
•
Supply fan to high speed.
Wheel rotation is off.
Second Stage Cooling (Air Conditioning)
•
•
•
24 VAC on auxiliary cooling terminal.
Supply fan to high speed.
Wheel rotation is on.
Ventilation
Ventilation time periods will be determined through the
schedule programming of the DDC system. Using the DDC
keypad, the operator is able to select the on and off times on
a daily, weekly or monthly basis. Refer to Appendix F and the
Sequence of Operation section for adjustment of the ventilation schedule.
Mode Cooling
First stage cooling puts the supply fan and exhaust fan to
high speed and stops the energy recovery wheel. Second
stage cooling is an option and calls for Dx cooling from eiVCES-VUV-IOM-4B – ERV1100w & ERV2000w
ther a WSHP or a remote condensing unit. The supply fan
runs on high speed and the energy recovery wheel rotates.
8
Recirculation Control
In ventilation mode, the outside air damper is open and
the supply air is a mixture with a percentage of return air.
In recirculation mode, the ventilation damper is closed and
100% of the supply air is recirculated air from the return
plenum.
Units equipped with recirculation control are built with a
damper mechanism controlling air flow through the intake
duct. Ventilation mode is activated by the DDC controller
schedule.
Frost Control
Recirculation and Exhaust Only Defrost
VSD (Variable Speed Drive) Frost Prevention
These two frost control strategies consist of a timer/controller that is activated by a thermistor which monitors the
outside air temperature passing through the air intake.
When the unit is in ventilation mode at defrost temperatures, the timer/controller activates frost control periodically to keep the enthalpy wheel free from frost.
The VSD frost prevention strategy is achieved by modulating the rotational speed of the enthalpy wheel to maintain
an exhaust air temperature of 33°F [1°C].
System Service
Monthly Maintenance
!
WARNING
Disconnect the main power switch to the unit before performing service or maintenance procedures.
Air Filters
The standard medium efficiency filters are disposable and
should be replaced monthly or as required by operating
conditions. When installing a new filter, the airflow arrow
should point in the direction of the enthalpy wheel. To
remove the supply filter, open the bottom access door
and pull out the filter as shown in Figure 2. To remove the
exhaust filter, remove the bottom access door and pull out
the filter as shown in Figure 3.
Figure 3: Exhaust filter
Figure 2: Supply filter
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
9
Annual Maintenance
!
WARNING
Disconnect the main power switch to the unit before performing service or maintenance procedures.
Interior of Unit
The inside of the unit should be vacuumed or wiped clean
annually with a soft cloth and mild cleaning solution.
Check the drain fittings (if equipped) to ensure they are
draining freely.
Enthalpy Wheel
No cleaning of the enthalpy wheel is required. It is selfcleaning due to the opposing airflows. If the enthalpy
wheel is cleaned, use low pressure air or a vacuum. Visually inspect the cassette brush seals and drive belt for
proper operation. See Figure 4.
Figure 5: Loosen wing nut to remove blower
Rotor
Brush.seal
Figure 4: Brush seal
Heaters/Air Conditioning Coils
Figure 6: Disconnect electrical plugs
Check the duct heaters, hot water coils and air conditioning coils for obstruction or buildup of dust. Check the
manual reset button on your duct heaters (if the unit has
electric heat). If the red buttons are released out, depress
the red button to reset the switch. If this problem persists,
call a qualified electrical technician for analysis.
Dampers
Check dampers for obstruction and cleanliness.
Fans
Blower wheels and fan housings should be checked for
dust buildup. If excessive dust buildup exists, it will be necessary to remove the blower assembly to clean the dust
out through the fan mouth.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Figure 7: Removing the supply blower
10
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Exhaust air
Outdoor air
LEFT VIEW
B
A
3.735”
[95]
9.180”
[233]
C
8.753”
[222]
Supply air
FRONT VIEW
41.300”
[1,049]
Return air
TOP VIEW
2.250”
[57]
3.456”
[88]
12.000”
[305]
5.534”
[141]
75.851”
[1,927]
RIGHT VIEW
2.989”
[76]
15.964”
[405]
11.000”
[279]
D
Free
cooling
bypass
67.964”
[1,726]
WSHP water
line supply
WSHP water 5.254”
[133]
line return
Power connection
Control wire connection
Hot water coil supply/return
CW/Dx condensate drain
30.500”
[775]
A
B
C
D
BACK VIEW
7.500” 7.500”
[191] [191]
17.239”
[438]
EA
OA
12.000”
[305]
Connection Sizes
2.0” [51]
1.0” [25]
1.0” [25]
0.75” [19]
14.000”
[356]
Access Opening Table
Notes:
Dimensions in [ ] are millimeters.
Direction of airflow
B
2.502” [64]
3.858” [98]
25.850”
[657]
11.000”
[279]
A
32.000”
[813]
2.670” [68]
2.904”
[74]
Appendix A: Unit Dimensions
Figure A1: ERV1100w unit dimensions
11
Figure A2: ERV2000w unit dimensions
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
12
A
D
3.645”
[93]
16.125”
[410]
75.747”
[1,924]
WSHP water
line supply
WSHP water 4.322”
line return [110]
4.904”
[125]
3.815”
[97]
B
EA
OA
12.000”
[305]
7.500”
[191]
18.646”
[474]
BACK VIEW
8.125”
[206]
24.074”
[611]
Free
cooling
bypass
20.250”
[514]
TOP VIEW
2.250”
[57]
12.250” 9.101”
[311]
[231]
Outdoor
air
Exhaust
air
2.502”
[64]
3.934”
[100]
11.000”
[279]
34.350”
[872]
25.899”
[658]
B
A
32.000”
[813]
[74]
2.746”
[70] 2.914”
C
13.440”
[341]
2.224”
[56]
LEFT VIEW
A
B
C
D
FRONT VIEW
48.000”
[1,219]
Return air
84.249”
[2,140]
Connection Sizes
2.0” [51]
1.0” [25]
1.0” [25]
0.75” [19]
Supply air
Power connection
Control wire connection
Hot water coil supply/return
CW/Dx condensate drain
Access Opening Table
Notes:
Dimensions in [ ] are millimeters.
Direction of airflow
RIGHT VIEW
30.500”
[775]
Appendix B: Plenum Dimensions
1.25”
[32]
2.25”
[57]
26.75”
[679]
Control wire
access Ø 1” [25]
Electrical
access Ø 2” [51]
8.75”
[222]
27.00”
[686]
30.50”
[775]
41.30”
[1,049]
23.75”
[603]
17.00”
[432]
11.75”
[298]
1.25”
[32]
3.00”
[76]
TOP VIEW
5.25”
[133]
Ø 1” [25] x 4
electrical/piping
access holes
2.63”
[67]
FRONT VIEW
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B1: ERV1100w standard plenum dimensions
1.25”
[32]
2.25”
[57]
30.50”
[775]
41.30”
[1,049]
26.75”
[679]
Control wire
access Ø1” [25]
Electrical
access Ø 2” [51]
27.00”
[686]
17.00”
[432]
3.00”
[76]
1.25”
[32]
TOP VIEW
5.25”
[133]
Ø 1” [25] x 4
electrical/piping
access holes
FRONT VIEW
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B2: ERV1100w ducted plenum dimensions
8.75”
[222]
30.50”
[775]
41.30”
[1,049]
23.75”
[603]
11.75”
[298]
7.74”
[197]
15.96”
[405]
3.38”
[86]
3.74”
[95]
25.00”
[635]
11.03”
[280]
TOP VIEW
FRONT VIEW
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B3: ERV1100w silencer plenum dimensions
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
13
48.00”
[1,219]
26.70”
[678]
30.50”
[775]
26.94”
[684]
11.28”
[287]
Control wire
access Ø 1” [25]
Electrical
access Ø 2” [51]
3.00”
[76]
5.25” [133]
TOP VIEW
1.25”
[32]
2.20”
[56]
1.25”
[32]
17.00”
[432]
3.21”
[82] 4.05”
[103]
19.26”
[489]
FRONT VIEW
Ø 1” [25] x 4
electrical/piping
access holes
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B4: ERV2000w standard plenum dimensions
26.70”
[678]
48.00”
[1,219]
26.94”
[684]
30.50”
[775]
17.00”
[432]
Control wire
access Ø 1” [25]
Electrical
access Ø 2” [51]
3.00”
[76]
5.25” [133]
TOP VIEW
1.25”
[32]
1.25”
[32]
2.20”
[56]
FRONT VIEW
Ø 1” [25] x 4
electrical/piping
access holes
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B5: ERV2000w ducted plenum dimensions
2.43”
[62]
48.00”
[1,219]
7.74”
[197]
16.28”
[414]
TOP VIEW
18.28”
[464]
3.38”
[86]
3.74”
[95]
25.00”
[635]
30.50”
[775]
4.36”
[111]
15.96”
[405]
18.28”
[464]
FRONT VIEW
RIGHT VIEW
Note: Dimensions in [ ] are millimeters.
Figure B6: ERV2000w silencer plenum dimensions
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
14
Appendix C: Airflow Performance Data
ERV1100w
on the right hand Y axis­—Outside Air Percentage
(% of Fully Open Supply Side Volume)—and run
across to the Outside Air Curve (see #1 below). 50%
equates to 42° open OA damper or 5.5 VDC for
modulating damper actuator.
3. Find the new TA volume by running vertically from
point #1 on the 42° open line to the Total Air Curve
and then horizontally to the left hand Y axis (see #2
below). In this example, the TA is 95.5% of full open
which is 95.5% x 900 = 860 cfm.
4. Find the corrected OA volume by multiplying the
desired % OA volume (50%) by the new TA volume
(860 cfm). Example: 50% x 860 = 430 cfm OA.
5. To find the damper setting for high speed cooling
(1,200 cfm) the same procedure may be followed.
In this example, 450/1,200 = 38% which is less than
the minimum recommended amount of 41% (4 VDC
or 24° open). This means that the damper should
only be set to the minimum open position of 24°
(or 4 VDC). The resultant TA amount will be 91%
x 1,200 = 1,092 cfm with an OA amount of 41% x
1,092 = 448 cfm.
Outdoor Air Damper Position Selection
With the outdoor air (OA) and return air (RA) dampers
fully open, the airflow values are given in the chart on the
following page. OA volume is approximately 53% of total
air (TA) with both dampers fully open. The following procedure shows how to determine the OA damper position
to set the amount of OA available.
Example
• Desired TA for heating is 900 cfm.
• Desired TA for cooling is 1,200 cfm.
• Desired OA is 450 cfm.
• Unit configuration is hydronic heat and Dx cooling.
Since the worst case design is in the heating mode at 900
cfm TA, we need to start here.
Procedure
1. If this OA volume is too high, calculate the desired
percentage of OA volume to TA volume required.
Example: You want 450 cfm OA and 900 cfm TA so
450/900 = 50% OA.
2. Determine the appropriate OA damper position to
achieve the OA volume of 450 cfm by finding 50%
Modulating Outdoor Air Damper System Response
Minimum recommended
open angle is 24°
24
100
OA DAMPER OPEN ANGLE (DEGREES OPEN)
30
36
42
48
60
42° open
58
#2 – 95.5%
TOTAL AIR PERCENTAGE (% OF FULLY OPEN TOTAL AIR VOLUME)
59
57
96
56
55
94
54
53
92
52
#1 – 50%
Total air curve
51
90
50
49
88
48
47
86
46
45
84
44
Outside air curve
43
82
OUTSIDE AIR PERCENTAGE (% OF FULLY OPEN SUPPLY SIDE VOLUME)
98
42
5.5 VDC
80
4.0
4.5
5.0
5.5
41
40
6.0
OA DAMPER VOLTAGE (VDC)
Figure C1: ERV1100w airflow performance
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
15
Table C1: ERV1100w Airflow Performance Data
Fan
Speed
External Static Pressure (in. w.g.)
0.0
TA
0.1
OA
TA
0.2
OA
TA
0.3
OA
TA
0.4
OA
TA
0.5
OA
TA
0.6
OA
TA
OA
Airflow High/Low Speed
Setting Variable Between
CFM Range
Chilled Water Cooling with Electric Post-heat
High
1,200
636
1,200
636
1,200
636
1,100
583
N/A
N/A
N/A
N/A
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
N/A
N/A
N/A
N/A
N/A
N/A
1,200
636
600
318
Chilled Water Cooling Only
High
1,200
636
1,200
636
1,200
636
1,100
583
N/A
N/A
N/A
N/A
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
N/A
N/A
N/A
N/A
N/A
N/A
1,200
636
600
318
High
1,200
636
1,200
636
1,200
636
1,150
610
1,150
610
1,100
583
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
900
477
900
477
N/A
N/A
1,200
636
600
318
High
1,200
636
1,200
636
1,200
636
1,150
Low
900
477
900
477
900
477
900
Water Source Heat Pump or Dx Cooling with Electric Post-heat
Water Source Heat Pump or Dx Cooling
610
1,150
610
1,100
583
N/A
N/A
TA
OA
TA
OA
477
900
477
900
477
N/A
N/A
1,200
636
600
318
Electric Heat Only
High
1,200
636
1,200
636
1,200
636
1,200
636
1,200
636
1,200
636
1,200
636
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
900
477
900
477
900
477
1,200
636
600
318
Chilled Water Cooling with Hot Water Post-heat
High
1,200
636
1,150
610
1,150
610
1,100
583
N/A
N/A
N/A
N/A
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
N/A
N/A
N/A
N/A
N/A
N/A
1,100
583
600
318
Hot Water Heat Only
High
1,200
636
1,200
636
1,200
636
1,150
610
1,150
610
1,100
583
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
900
477
900
477
N/A
N/A
1,200
636
600
318
High
1,200
636
1,200
636
1,200
636
1,100
583
N/A
N/A
N/A
N/A
N/A
N/A
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
N/A
N/A
N/A
N/A
N/A
N/A
1,200
636
600
318
High
1,200
636
1,200
636
1,200
636
1,175
623
1,150
610
1,125
596
1,100
583
TA
OA
TA
OA
Low
900
477
900
477
900
477
900
477
900
477
900
477
900
477
1,200
636
600
318
Water Source Heat Pump or Dx Cooling with Hot Water Post-heat or Hot Gas Reheat
Gas Heat
Outdoor air values are maximums. These volumes can be decreased using the outside air damper/maximum open setting.
Airflow high/low valves may be set within the variable cfm range.
Outdoor airflows are representative of actual air being delivered to the space. 50 cfm cross leakage has been subtracted from airflow measured at the outdoor air damper.
All airflow measurements have been made in accordance with the Air Movement and Control Association (AMCA) 210 method of testing.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
16
ERV2000w
Outdoor Airflow Adjustment
If the desired outside airflow is less than the value shown
in the ERV2000w airflow performance data table (see
Table C2), the amount of airflow can be reduced by partially closing the outside air inlet damper. Please note that
the total airflow will be affected when adjusting the outside air damper. To determine the amount that the outside
air damper must be closed, divide the desired flow by the
rated outside airflow from Table C2.
Example
• 4 ton WSHP at 0.3 ESP and 500 cfm desired outside
airflow.
• From ERV2000w airflow performance data table:
TA = 1,800 cfm and OA = 576 cfm.
Procedure
1. Divide desired airflow by outside airflow rate:
500/576 = 0.87.
2. From outside air damper curve (below): 28° outside
air damper setting.
3. New total airflow is: 1,800 x 0.94 = 1,692 cfm.
4. Airflow in unoccupied: 1,800 x 0.90 = 1,620 cfm.
Outside Air Damper Curve
120
100
% AIR FLOW
80
60
40
20
0
0
20
40
60
80
100
OUTSIDE AIR DAMPER DEGREES OPEN
LEGEND
Outside airflow
Total airflow
Recommended range
Figure C2: ERV2000w airflow performance
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
17
Table C2: ERV2000w Airflow Performance Data
Chilled Water Cooling with Electric Post-heat
Chilled Water Cooling Only
Water Source Heat Pump or Dx Cooling with Electric Post-heat
Water Source Heat Pump or Dx Cooling
Electric Heat Only
Chilled Water Cooling with Hot Water Post-heat
Hot Water Heat Only
Water Source Heat Pump or Dx Cooling with Hot Water Post-heat
Water Source Heat Pump with Hot Gas Reheat
Capacity
4 and 5 ton
3 and 3.5 ton
Fan
Speed
External Static Pressure (in. w.g.)
0.0
TA
0.1
OA
TA
0.2
OA
TA
0.3
OA
0.4
TA
OA
0.5
TA
OA
TA
OA
High
2,000
640
2,000
640
2,000
640
2,000
640
2,000
640
2,000
640
Low
1,800
576
1,800
576
1,800
576
1,800
576
1,800
576
1,800
576
High
1,600
512
1,600
512
1,600
512
1,600
512
1,600
512
1,600
512
Low
1,400
448
1,400
448
1,400
448
1,400
448
1,400
448
1,400
448
Airflow High/Low Speed
Setting Variable Between CFM Range
OA
TA
OA
2,000 640
TA
900
288
OA
TA
OA
1,600 512
TA
900
288
Outdoor air values are maximums. These volumes can be decreased using the outside air damper/maximum open setting.
Airflow high/low valves may be set within the variable cfm range.
For the 3 and 3.5 ton units, the return air (RA) damper is 30% open. Outdoor air (OA) can be reduced by partly closing the OA inlet damper.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
18
Appendix D: Electrical Data
Table D1: ERV1100w Blower Motors Full Load Amperage (FLA)
HP
¼ (exhaust)
½ (supply – no gas)
¾ (supply with gas)
Voltage
120/1/60
4.80
5.80
8.00
208/1/60
2.20
3.40
8.00**
230/1/60
2.20
3.40
8.0**
208/3/60
2.20*
3.40*
230/3/60
2.20*
3.40*
460/3/60
1.10*
1.20*
208/3/60
2.20*
3.40*
5.80*
230/3/60
2.20*
3.40*
5.80*
460/3/60
1.10*
1.20*
2.90*
208/3/60
6.95
13.90
20.84
27.79
34.74
230/3/60
6.28
12.57
18.85
25.13
31.41
460/3/60
3.14
6.28
9.42
12.57
15.71
208/3/60
9.30
10.40
15.50
20.70
19.60
22.90
230/3/60
9.30
10.40
15.50
20.70
19.60
22.90
460/3/60
5.00
6.30
7.10
6.90
10.70
10.70
Table D2: ERV2000w Blower Motors Full Load Amperage (FLA)
HP
¼ (exhaust)
½ (1,200–1,600 CFM)
1 (2,000 CFM)
Voltage
120/1/60
4.80
5.80
10.50
208/1/60
2.20
3.40
5.80
230/1/60
2.20
3.40
5.80
Table D3: ERV1100w and ERV2000w Heaters (FLA)
kW
Voltage
120/1/60
2.5
5.0
7.5
10.0
12.5
208/1/60
12.02
24.04
230/1/60
10.87
21.74
Table D4: ERV1100w and ERV2000w Compressors – One-stage, R410a (FLA)
Tons
Voltage
120/1/60
2.0
2.5
3.0
3.5
4.0
5.0
208/1/60
15.00
18.60
20.70
24.70
30.00
33.60
230/1/60
15.00
18.60
20.70
24.70
30.00
33.60
Table D5: ERV1100w and ERV2000w Compressors – Two-stage, R410a (FLA)
Tons
Type
2.0
2.5
3.0
3.5
4.0
Two-stage
Two-stage
Two-stage
Two-stage
Two-stage
Voltage
208/230/3/60
7.20
12.90
15.80
15.60
18.10
208/230/1/60
13.00
17.00
20.00
23.60
32.10
460/3/60
3.90
6.40
6.90
7.10
8.50
Table D6: ERV1100w and ERV2000w Wheels and Controls (FLA)
Voltage
120/1/60
2.73
208/1/60
2.73
230/1/60
2.73
208/3/60
1.58*
230/3/60
1.58*
460/3/60
0.71*
The following notes apply to the above tables:
All three-phase units have 208/230 VAC/1/60 fan motors
* Primary side of the transformer.
** 120 VAC/1/60 motor used.
*** Supply blower for units with gas heating only.
Shaded areas indicate the voltage is not available.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
19
Appendix E: Remote Occupant Interface
The BacStat is connected to the unit using a four-conductor cable. Shielded cable should be used for the BacStat
wiring and standard thermostat installation practices
should be used. Avoid mounting the BacStat near any
sources of heat or in places where airflow is restricted. The
BacStat should be accessible to the occupant.
CONTROL OUTPUTS
HYDRONIC/STEAM
VALVE
+ 24 VAC
2
− 24 VAC
3
W
AUX. HEAT
4
Y
AUX. COOL
AUX. POWER
The BacStat wires must run to the control terminal strip inside the unit. This terminal strip may have a wide variety of
hardware and networking outputs (depending on the unit
type and its configuration), but the BacStat connection is
always clearly marked. The drawing below shows the BacStat wiring for a typical hydronic unit.
CHILLED WATER
VALVE
1
10K ROOM
THERMISTOR
5
6
7
1
8
2
9
NET +
BACNET
MS/TP
10
NET −
RS-485
10K ROOM
THERMISTOR
CONTROL OUTPUTS
1
+ 24 VAC
AUX. POWER
2
− 24 VAC
3
W
AUX. HEAT
4
Y
AUX. COOL
−24
5
PWR 24V
GND
6
COM
+
7
NET +
−
8
NET −
9
NET +
BACNET
MS/TP
10
NET −
RS-485
CLASS 2 VOLTAGE
Note:
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
BACSTAT II
ROOM
SENSOR
+
RS-485
−
BACSTAT
CONNECTION
ONLY!
Figure E2: Room sensor – 10K thermistor
CLASS 2 VOLTAGE
Note:
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
N
Ground
L2
L1
Figure E1: Remote occupant interface
L1
L2
N
High voltage terminals
Notes:
1. Fused disconnect switch supplied by Installer.
2. 208–230 VAC/120/1/60 requires a neutral wire
to be run with L1 and L2.
3. For 120/1/60 volt units, L2 is not required.
Figure E3: Single-phase power supply wiring
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
20
Appendix F: DDC Keypad Reference Guide
Unit Setup and Configuration
Troubleshooting Quick Reference Guide
Using the Keypad Controls
Entering the Menu Mode
Values are changed using the up and down arrow keys.
To enter the menu mode, hold down the left and right
arrow keys at the same time for a few seconds until the
word ‘Pin’ appears on the display. Enter the ‘Pin’ number.
At this point, the controller will enter the menu mode, displaying one of the three menus listed below.
Adjusting Room Setpoint
Press the ‘Thermometer’ key. The room setpoint will be
displayed and may be altered using the up and down
arrow keys (factory set at 72°F [22°C]). Pressing the ‘Thermometer’ key again will enter the selected setting(s).
Adjusting Date and Time
Press the ‘Clock’ key. Cycle through the time and date
fields using the left and right arrow keys and adjust the
values using the up and down arrow keys. Pressing the
‘Clock’ key again will enter the selected setting(s).
Selecting Menu and Sub-menus
Refer to Table F1.
Use the number keys to select the appropriate menu
and the left and right keys to alternate between the submenus.
Selecting Individual Parameters and Settings
Setting the Schedule
Refer to Table F1.
Press the ‘Schedule’ key. Cycle through the daily on and
off times with the left and right arrow keys. Adjust the
time with up and down arrow keys. To change the time
increment (ex. hours to minutes) hold the ‘Occupied’ key
down while using the up and down arrow keys to change
the value. Pressing the ‘Schedule’ key again will enter the
selected setting(s).
Use the left and right arrow keys to cycle through the individual parameters and the up and down arrow keys to
change the available settings.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
21
Table F1: DDC Keypad Reference Guide
Menu
Manual Control
Sub-menu
Manual Mode
Display – Man Mode
Display – Ctrl
Only one mode may
Button ‘1’ on keypad be manually active at
any time
System Diagnostics Input Monitor
Display – Diag
Button ‘2’ on keypad
System will continue
to operate normally
while in diagnostic
mode
System Configuration
Display – Cfg
Button ‘3’ on keypad
Parameter
Settings
Active/inactive
Off/stage 1/2/3/4
Off/stage 1/2/3
Off/stage 1/2/3/4
Off/stage 1/2/3
Value from sensor
Value from sensor
Value from sensor
Display – IP Montr
Value from sensor
Value from sensor
Value from sensor
System Values
Value from controller
Value from controller
0, 1, 2, 3
0, 1, 2, 3, 4
Display – Sys Valu
On/off
On/off
ID #
0°F to 70°F, set at 68°F
Setpoint Adjustment Free cooling setpoint
[−18°C to 21°C, set at 20°C]
Unoccupied cooling
Unoccupied heat 80°F, set at
setpoint
76°F [27°C, set at 24°C]
0 to unoccupied cooling, set
Unoccupied heating
at 65°F [−18°C to unoccupied
setpoint
cooling, set at 18°C]
OAD min position
0% to 100%, set at 50%
Display – SP Adj
Humidity setpoint
0% to 100% RH, set at 50% RH
40°F to 65°F, set at 50°F
Discharge cooling setpoint
[4°C to 18°C, set at 10°C]
50°F to 105°F, set at 90°F
Discharge heating setpoint
[10°C to 41°C, set at 32°C]
−5°F to 50°F, set at 5°F**
Defrost setpoint
[−21°C to 10°C, set at −15°C]
0°F to 20°F, set at 4°F
Controller Settings Heating prop band
[−18°C to −7°C, set at −16°C]
Heating reset rate
0 to 100%, set at 2%
0°F to 20°F, set at 4°F
Cooling prop band
[−18 to −7°C, set at −16°C]
Cooling reset rate
0 to 100%, set at 2%
Display – CO Setup
Exit Menus
Display – Exit
Button ‘5’ on keypad
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Occupied ventilation
Occupied heating
Occupied cooling
Unoccupied heating
Unoccupied cooling
OA temperature
Mixed air temperature
Coil leaving air temperature
Discharge air temperature
Exhaust air temperature
Coax water temperature
Cooling controller
Heating controller
Cooling stage
Heating stage
Defrost flag
Free cooling flag
Program ID
Units
Metric/US
Dx cooling
On/off
Exit
Yes/no
Comments
Unit will go into a standby
mode while user is in manual
control of outputs.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
* Display only – not adjustable.
Modulating actuator only.
Units with reheat only.
** 33°F for VSD frost prevention
[1°C for VSD frost prevention].
4°F [−16°C] = +/− 2°F
2% = 2% bias change/minute
4°F [−16°C] = +/− 2°F
2% = 2% bias change/minute
* Recommend to power down
the unit after changing this
setting.
Enables/disables Dx cooling.
22
Appendix G: Start-up and Troubleshooting
Before powering the unit, check the following:
•
•
•
•
•
•
High voltage is correct and matches the nameplate.
Fuses, breakers and wire sizes are correct.
Low voltage wiring is completed.
Piping is completed and water system has been
cleaned and flushed.
Isolation valves are open and loop water control
valves or loop pumps are wired.
Service/access panels are in place.
Unit Start-up
1. Set control above cooling setpoint.
2. Slowly reduce the control setting until both the compressor and water control valve are activated. Verify
that the compressor is on and the water flow rate is
correct.
3. After operating the unit for a few minutes, check
that the unit is functioning properly by providing satisfactory cooling.
4. Adjust control below heating setpoint.
5. Slowly increase the control setting until both compressor and water control valve are activated.
6. After operating the unit for approximately ten minutes, check the supply air temperature to ensure the
unit is providing satisfactory heating.
7. Check for vibrations, noise and water leaks.
8. Set system to maintain desired setpoint.
9. Instruct the owner/operator of correct control and
system operation.
Troubleshooting
Should a major problem develop, refer to the following
information for possible causes and corrective steps.
Table G1: ERV1100w and ERV2000w Troubleshooting
Problem
Sufficient cooling or
heating is not obtained.
Cause
Solution
Restricted water flow.
Check for restriction in water flow.
Check refrigerant subcooling and superheat for low refrigerant
charge.
Low refrigerant charge.
The reversing valve may be defective and
creating a bypass of refrigerant.
Improper installation of vibration absorbing
material.
Improper unit support.
Check thermal expansion valve for possible restriction of
refrigerant flow.
Check compressor for loosened mounting bolts. Make sure
compressor is floating free on its isolator mounts.
Check for tubing contact with the compressor or other surfaces.
Re-adjust by bending slightly.
Check screws on all panels are in place and secured.
Check for clattering or humming in the contactor or relays due
to low voltage or a defective holding coil. Replace the defective
component.
Check for proper installation of vibration absorbing material
under the unit.
Unit must be fully supported, not just on corners.
Incorrect discharge pressures.
Check for abnormally high discharge pressures.
Incorrect phasing.
Check for proper phasing.
Restricted refrigerant flow.
Loosened mounting bolts.
Tubing contact with compressor.
Loose screws.
Unit operation is noisy.
If the unit will not cool, check the reversing valve coil.
Low voltage or defective holding coil.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
23
Table G1: ERV1100w and ERV2000w Troubleshooting
Problem
Cause
The fuse may be open or the circuit breaker
may be tripped.
Supply voltage may be too low.
Control system may be faulty.
Wires may be loose or broken.
The low pressure switch may have been
tripped.
Compressor will not run.
The high pressure switch may have been
tripped.
The compressor overload protection may be
open.
Solution
Check electrical circuits and motor windings for shorts or grounds.
Investigate for possible overloading.
Replace fuse or reset circuit breakers after fault is corrected.
Check with a voltmeter.
Check control for correct wiring and check the 24V transformer
for proper voltage.
Replace or tighten wires.
Heating:
•Lack of water flow.
•Water too cold.
•Loss of refrigerant.
Cooling:
•Insufficient supply airflow.
•Loss of refrigerant.
Heating:
•Insufficient supply airflow.
•Water too warm.
Cooling:
•Lack of water flow.
If the compressor dome is extremely hot, the overload will not
reset until it has cooled down. If the overload does not reset
when cool, it may be defective. If so, replace compressor.
The internal wiring of the compressor motor
may be grounded to the compressor shell.
Replace the compressor.
The compressor winding may be open.
Check continuity with an ohmmeter. If winding is open, replace
the compressor.
Check thermostat setting, calibration and wiring.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
24
Appendix H: ERV1100w and ERV2000w Start-up Report
Date:_____________________________________________
Site Reference:_____________________________________
Job Number:_______________________________________
Unit Number:______________________________________
Unit Type:_________________________________________
Room Number:____________________________________
Installer:_ _________________________________________
Representative:_____________________________________
Service Technician:__________________________________
Company:_________________________________________
Phone Number:____________________________________
Installation Check
L2:______________________________________________
L3:______________________________________________
Running Current Heating
L1:______________________________________________
L2:______________________________________________
L3:______________________________________________
Electric Heat
Stage 1 Current
L1:______________________________________________
L2:______________________________________________
L3:______________________________________________
Stage 2 Current
__ Unit level.
__ Unit bolted to floor or wall.
__ Condensate drain correct.
__ Wallsleeve correct.
__ Wallsleeve insulated.
__ Electrical connections tight.
__ Damage to unit. Please describe:___________________
_________________________________________________
L1:______________________________________________
L2:______________________________________________
L3:______________________________________________
Mains Voltage
Indoor Fan
Refrigeration
Size:______________________________________________
Type:_____________________________________________
FLA:______________________________________________
Fan Volts (L1 to M)
Suction Pressure
High:____________________________________________
Low:____________________________________________
Fan Current (L1)
Cooling Mode:____________________________________
Heating Mode:____________________________________
Superheat
High:____________________________________________
Low:____________________________________________
Cooling Mode:____________________________________
Heating Mode:____________________________________
L1:______________________________________________
L2:______________________________________________
L3:______________________________________________
Control Voltage:_ __________________________________
Cooling Mode:____________________________________
Heating Mode:____________________________________
Discharge Pressure
Outdoor Fan
Air Temperatures
Size:______________________________________________
Type:_____________________________________________
FLA:______________________________________________
Fan Volts (L3 to M)
Return Air Temperature
High:____________________________________________
Low:____________________________________________
Fan Current (L3)
Cooling Mode:____________________________________
Heating Mode:____________________________________
Outside Temperature
High:____________________________________________
Low:____________________________________________
Cooling Mode:____________________________________
Heating Mode:____________________________________
Coil Temperature
Compressor
Size:______________________________________________
Type:_____________________________________________
RLA:______________________________________________
Running Current Cooling
L1:______________________________________________
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Cooling Mode:____________________________________
Heating Mode:____________________________________
Supply Air Temperature
Cooling Mode:____________________________________
Heating Mode:____________________________________
Occupied Setpoint:_ ________________________________
Unoccupied Setpoint:_______________________________
Outstation Number:________________________________
25
Appendix I: ECM Motor CFM Adjustment Procedure
Step 1
Decrease CFM
Using a DMM set to measure VDC, record all current
values for each of the Flo points. Measurement is made
between Flo Com and the respective Flo test point. Record
these values under Factory Set. Refer to Figure I1 to locate
test points.
While measuring the Flo setting adjust the respective RP
potientiometer counter-clockwise for that speed. A voltage decrease of 0.05 VDC will decrease the motor torque
by one oz-ft.
Increase CFM
While measuring the Flo setting adjust the respective RP
potientiometer clockwise for that speed. A voltage increase
of 0.05 VDC will increase the motor torque by one oz-ft.
A one oz-ft adjustment in motor torque will approximately
increase/decrease the fan output by 25–50 cfm.
Record the new values set for each Flo setting under Field
Set values.
Table I1: ECM Motor Adjustment Values
Figure I1: ECM test points
Step 2
If a voltage is present on Flo 0, that will be your low speed
setting. If no voltage present on Flo 0 then Flo 1 is low
speed. Each ascending Flo value corresponds to the next
speed setting.
VCES-VUV-IOM-4B – ERV1100w & ERV2000w
Factory Set
Measured
Test Point
Value
Flo 0
Field Set
Measured
Test Point
Value
Flo 0
Flo 1
Flo 1
Flo 2
Flo 2
Flo 3
Flo 3
Flo 4
Flo 4
26
info@venmarces.com
www.venmarces.com
Venmar CES Inc. has a policy of continuous improvement and reserves
the right to change design and specifications without notice.
©2006 Venmar CES Inc.
VCES-VUV-IOM-4B (PN 500000768)
February 2014