Oxygen 8 SERENA User manual

INSTALLATION
& OPERATION
MANUAL
SERENA ERV

Table of Contents
1.0 Safety Instructions
2.0 Components
3.0 Wiring Diagrams & Airflows
3.1 Furnace/Fan Coil/Heat Pump Interlock
3.2 Airflow for Dierent Knob Positions
4.0 ERV Operational Modes
5.0 Timer Switch & Intermittent Switch
7.0 ERV Typical Installations
6.1 Horizontal and Vertical Installations
6.2 Typical Installations of Single Vents and Access Door
7.0 Airflow Balancing
7.1 Balancing Procedure
7.2 Pitot Tube Airflow Balancing
7.3 Airflow Balancing in Duct
8.0 Maintenance
8.1 Regular Maintenance
8.2 Annual Maintenance
9.0 Troubleshooting

Installation Manual Serena Series
Warning
To reduce the risk of fire, electric shock or injury, observe
the following:
1. Read all instructions carefully before installation,
operation or maintenance of the unit. Failure to comply
with instructions could result in personal injury and/or
property damage.
2. Installation of the unit and the corresponding electrical
wiring must be done by a qualified person and be in
accordance with all municipal and national electrical
codes and pertinent industry standards should be
verified before installation.
3. Use this unit only in the manner intended by the
manufacturer. If you have any questions, contact the
manufacturer.
4. Moving parts: disconnect power supply before opening,
ensure all nuts and screws are securely fastened before
restarting the unit.
5. Before servicing or cleaning the unit, switch power o
at the service panel and lock the service disconnecting
means to prevent power from being switched on
accidentally. When service disconnecting means cannot
be locked, securely fasten a prominent warning device,
such as a tag, to the service panel.
6. When cutting or drilling into a wall or ceiling, make sure
that you do not damage electrical wiring and other
hidden utilities.
7. To reduce the risk of fire, use only metal ductwork.
Do not use any accessories not recommended by the
manufacturer.
8. When performing installation, servicing or cleaning
of the unit, it is suggested to wear safety glasses and
gloves.
9. Do not use this unit for commercial purposes.
10. For residential use only. The unit must be grounded.
11. Do not install in a cooking area.
12. This unit is not designed to exhaust combustion and/or
dilution air for fuel burning appliances.
Packaging Inspection
Open the box and check to make sure all of the parts and
accessories are present and in good condition. If you find
any parts missing or any shipping damage, please contact
our factory or distributor immediately.
Caution
1. Turn the unit OFF during construction or repair to avoid
filter blockage.
2. Exhaust air outside - Do not intake/exhaust air into
spaces within walls, crawl spaces, garage or into attics.
3. The unit must be installed in accordance to National
and Local Building Codes.
4. When leaving the house for a long period of time (more
than two weeks), a responsible person should check if
the unit operates adequately.
Contents
Parts List
• S300
• S500
Wiring Diagram
• Serena Series
• Furnace/Fan Coil/Heat Pump Interlock
Standard Furnace Interlock Wiring
Alternate Furnace Interlock Wiring
ERV Typical Installations
• For Residential
Fully Ducted System
Furnace Return Air-Duct Connection
Semi Ducted System
• For High-Rise Residential
Fully Ducted System
With Fan-Coil System
• Horizontal
• Vertical
• Access Door Installation
• Drain Connection
Air Flow Balancing
• Balancing Procedure
• Pitot Tube Air Flow Balancing
• Air Flow (CFM) Chart for Dierent Knob Position
Maintenance
• Regular Maintenance
• Annual Maintenance
Troubleshooting
Climate Zone
1.0 Safety Instructions
READ AND SAVE THESE INSTRUCTIONS

Installation Manual Serena Series
No. Description Part No. Qty.
1 ERV - Lid, Pan Assembly 9391 1
2 Polypropylene Collar 6" Dia. PBD6C 2
3 Enthalpy Core 9394 N/A
4 Filter 10½" x 12" (MERV4) 9395 2
5 Temperature Sensor 9326 1
6 6" Ø Polypropylene Backdraft
Damper
PBD6 2
7 Fan - Supply/Exhaust 013070 ECM 1
8 Adjustable Door Latch 9319 1
9 Optional Drain Spout Assembly 9320 2
10 Core Locking Bracket 9321 1
11 Nut 014016 1
No. Description Part No. Qty.
12 Safety Switch 9322 1
13 Main Control Board (ECM) 9356 ECM 1
14 Main Control Board Bracket 9355 2
15 Door Hinges 9328 1 Set
12 Safety Switch 9322 1
13 Main Control Board (ECM) 9356 ECM 1
14 Main Control Board Bracket 9355 2
15 Door Hinges 9328 1 Set
16 Mounting Brackets -11136 4
17 "T" Connector 9330 1
2.0 Components
1
2
3
15
46
7
8
9
Note Units come standard with a plug-in style connection, but
may be ordered with direct connections.

Installation Manual Serena Series
3.0 Wiring Diagrams & Airflows
Control Board
Optional Accessories (Not Supplied)
a. Time Switch (TC100)
b. Wall Switch
c. Dehumidistat
d. Time Delay Switch (TC100-120 & TC100-120P)
e. Master On/O Switch for ERV
f. Light
g. Intermittent Switch
Note: When installing timers, intermittent switches or time delay switches, make sure that they are for the appropriate ERV model

Installation Manual Serena Series
Warning
Never connect a 120 volt AC circuit to the terminals of the furnace/fain-coil/heat pump interlock (Standard Wiring). Only use the
low voltage class 2 circuit.
3.1 Furnace/Fan Coil/Heat Pump Interlock
Low Voltage
+5
DAT
C
Speed
Contact
L0/HI
Speed
HV Input
Remote
0n/0ff
HV
NC
C
N0
Ext. Interlock
HIGH VOLTAGE
Low Voltage
+5
DAT
C
Speed
Contact
L0/HI
Speed
HV Input
Remote
0n/0ff
HV
NC
C
N0
Ext. Interlock
HIGH VOLTAGE
W R G Y
W
R
G
Y
C
FOUR WIRE
TWO WIRE
heating only
Cooling
System
THERMOSTAT TERMINALS
TWO WIRE
Low Voltage
+5
DAT
C
Speed
Contact
L0/HI
Speed
HV Input
Remote
0n/0ff
HV
NC
C
N0
Ext. Interlock
HIGH VOLTAGE
Low Voltage
+5
DAT
C
Speed
Contact
L0/HI
Speed
HV Input
Remote
0n/0ff
HV
NC
C
N0
Ext. Interlock
HIGH VOLTAGE
W R G Y
W
R
G
Y
C
FOUR WIRE
TWO WIRE
heating only
Cooling
System
THERMOSTAT TERMINALS
TWO WIRE
Standard Interlock Wiring
Alternate Interlock Wiring

Installation Manual Serena Series
3.2 Airflow (CFM) Chart for Dierent Knob Positions
Knob Position Knob Position Knob Position Knob Position
S.P. (in.wg) V.P. (in.wg) CFM V.P. (in.wg) CFM V.P. (in.wg) CFM V.P. (in.wg) CFM
00.03 29.5 0.03 118 0.08 213 0.13 274
0.1 0.01 20.0 0.02 99 0.07 194 0.11 258
0.2 0.01 80 0.06 175 0.10 251
0.3 0.055 165.5 0.09 232
0.4 0.05 156 0.08 213
0.5 0.045 146.5 0.07 194
0.6 0.04 137 0.06 175
0.7 0.03 118 0.05 156
0.8 0.02 99 0.045 146.5
0.9 0.04 137
1.0 0.03 118
Knob Position Knob Position Knob Position
S.P. (in.wg) V.P. (in.wg) CFM V.P. (in.wg) CFM V.P. (in.wg) CFM
0 0.21 336 0.25 367 0.29 398
0.1 0.19 320 0.24 359 0.26 375
0.2 0.17 305 0.22 344 0.24 359
0.3 0.15 289 0.20 328 0.23 352
0.4 0.14 282 0.19 320 0.21 336
0.5 0.13 274 0.17 305 0.19 320
0.6 0.12 266 0.16 297 0.17 305
0.7 0.11 258 0.14 282 0.16 297
0.8 0.10 251 0.13 274 0.14 282
0.9 0.08 213 0.12 266 0.13 274
1.0 0.06 175 0.09 232 0.12 266

Installation Manual Serena Series
4.0 ERV Operational Modes Functionality
O Mode
ERV fans are o. Defrost damper is closed (if equipped) to prevent cold air from entering the unit.
Normal Mode
In Normal mode ERV fans run and the unit exchanges indoor air with outdoor air. The airflow exchange can be adjusted in four
preset airflow values. Normal Mode is intended to be requested by the user for long time ERV operation.
High Ventilation Mode
In High Ventilation Mode the ERV fans run and the unit exchanges indoor air with outdoor air, as in Normal Mode, but the airflow
level is much higher. High Ventilation Mode is intended to be requested by the user if he/she requires quick air exchange in the
house.
Energy Saving Mode
The ERV will switch to Energy Saving Mode when it is requested by the User, from the Wall Mount Unit. In Energy Saving Mode
the ERV will automatically run in Auto mode 20 minute per every 4 hours. The rest of the time the unit will stay in OFF mode.
The defrost damper is closed to prevent cold air from entering the unit and the first running will start immediately after the ERV
was set to Energy Saving mode.
Defrost Mode
The unit automatically switches to Defrost mode, when the supply air is below 5°C(41°F), and returns to the last requested mode
when the outdoor air temperature becomes above 15°C(59°F). While defrosting, the exhaust fan runs in High Ventilation Mode
with supply fan shutting o and damper closed. Supply temperature is measured by a temp. sensor located in the ERV supply air
discharge duct. The Defrost Mode is an automatic mode which cannot be enabled/disabled by the user.

Installation Manual Serena Series
5.0 Timer Switch & Intermittent Switch (Optional)
1. TC100-5V
The Timer Switch Unit consists of 3 LEDs and 1 push button. The Timer Switch Unit can put the unit into High Speed Mode for
the set time on the Timer Switch (20 min, 40 min, 60 min).
When a timed cycle is complete the unit returns to normal run mode set on the Wall Control unit. When a Timer Switch is
activated, the other Timer Switch blinks its LED and Wall Mount Unit lights up its REMOTE icon on the LCD screen indicating that
the ERV has been forced into High Speed Mode.
If there are more than one Timer Switches activated, the Timer Switch with the longest time takes control, and only that Timer
Switch can turn o the timer switch operation. All 3 LEDs will blink to indicate error if the Control Board reports error or the Timer
Switch loses communication with the Control Board.
2. IC-100-5V
The Intermittent Switch allows users to select one of the following operation modes:
1. Low Speed Mode
2. High Speed Mode
3. Intermittent Mode
4. OFF Mode (Optional - Contact factory for details and to order)
On initial power up, Low Speed Mode and the second LED light are on. With another button press, the timer switch goes into
Intermittent Mode and the third LED light is on. In Intermittent Mode, the ERV starts with 20 minutes of low speed, which is
followed by 40 minutes o. The cycle is continued until intermittent mode is exited. By pressing a button, the timer switch moves
to OFF mode and all LED lights are o (optional)
3. TC-100-120
The Timer Switch activates the ERV on high speed for 5, 10, 15 & 30 minutes. Once an option is selected, the LED will turn on,
indicating the duration of the high speed mode. Once the duration is up, the unit will go back to normal mode and the LED light
will turn o.
4. TC-100-120P
The TC-100-120P is a 24 hour programmable Timer Switch that allows for the unit to be shut o for a pre-selected duration and
come back on when the time delay has been achieved.
Timer Switch
Model #TC100-5V
(5 VDC)
Timer Switch
Model #TC-100-120
(120 VDC)
Timer Switch (Programmable)
Model #TC-100-120P
(120 VDC)
Intermittent Switch
Model # IC-100-5V
(5 VDC)