Vent-Axia Sentinel, Totus 2 D-ERV, TOTUS2MINI, TOTUS2MIDI, TOTUS2MINI/CP Installation Operation & Maintenance
...
Copyright © 2009 Vent-Axia Limited. All rights reserved.
Sentinel
Totus 2 D-ERV
Installation, Operation & Maintenance
Stock Ref. N°
TOTUS2MINI
TOTUS2MINI/CP
TOTUS2MIDI
TOTUS2MIDI/CP
TOTUS2MAXI
TOTUS2MAXI/CP
PLEASE RETAIN THESE INSTRUCTIONS WITH THE PRODUCT.
Safety Information
2
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
IMPORTANT
PLEASE READ THESE INSTRUCTIONS
CAREFULLY BEFORE COMMENCING
INSTALLATION AND LEAVE THEM WITH
THE END USER.
1. THESE UNITS MUST BE SITED AND CONNECTED IN
ACCORDANCE WITH CURRENT IEE REGULATIONS, BS7671
(UK) OR THE APPROPRIATE STANDARDS IN YOUR
COUNTRY.
2. INSTALLATION SHOULD BE BY A QUALIFIED ELECTRICIAN
AND INSTALLER.
3. ALL REGULATIONS AND REQUIREMENTS MUST BE
STRICTLY FOLLOWED TO PREVENT HAZARDS TO LIFE AND
PROPERTY, BOTH DURING AND AFTER INSTALLATION, AND
DURING ANY SUBSEQUENT SERVICING AND MAINTENANCE.
4. THESE UNITS MUST BE EARTHED.
5. SITE THE UNIT AWAY FROM DIRECT SOURCES OF HEAT.
AMBIENT TEMPERATURE RANGE 10 TO 40ºC.
6. WHEN INSTALLING UNIT, TAKE CARE NOT TO DAMAGE
ELECTRICAL OR OTHER HIDDEN UTILITIES.
7. CHECK THE DETAILS ON THE RATING LABEL FOR
CORRECT VOLTAGE AND ELECTRICAL RATING.
8. THE INSTALLER IS RESPONSIBLE FOR THE INSTALLATION
AND ELECTRICAL CONNECTION OF THE SENTINEL SYSTEM
ON SITE. IT IS THE RESPONSIBILITY OF THE INSTALLER TO
ENSURE THAT THE EQUIPMENT IS SAFELY AND SECURELY
INSTALLED AND LEFT ONLY WHEN MECHANICALLY AND
ELECTRICALLY SAFE.
9. DUE TO THE WEIGHT OF THE UNITS, IT IS
RECOMMENDED THAT MULTIPLE PERSONS ARE INVOLVED
IN THE INSTALLATION. AT ALL TIMES, INSTALLATION
PRACTICES MUST COMPLY WITH RELEVANT HEALTH AND
SAFETY LEGISLATION.
10. SENTINEL AIR HANDLING UNITS ARE DESIGNED AND
SPECIFIED FOR USE WITH VENT-AXIA CONTROLS,
DAMPERS, GRILLES AND ACCESSORIES.
11. THIS APPLIANCE IS NOT INTENDED FOR USE BY YOUNG
CHILDREN OR INFIRM PERSONS WITHOUT SUPERVISION.
12. YOUNG CHILDREN SHOULD BE SUPERVISED TO ENSURE
THAT THEY DO NOT PLAY WITH THE APPLIANCE.
13. PRECAUTIONS MUST BE TAKEN TO AVOID THE
BACKFLOW OF GASES INTO THE ROOM, FROM THE OPEN
FLUE OF GAS OR OTHER FUEL BURNING APPLIANCES.
14. THIS UNIT SHOULD NOT BE USED IN A GREASE-LADEN
ATMOSPHERE. IF THE UNIT IS TO BE USED IN A GREASELADEN ATMOSPHERE SUITABLE DUCT FILTRATION SHOULD
BE USED.
PRODUCTS COVERED
Thank you for purchasing Sentinel Totus 2 D-ERV.
This document describes the installation and
commissioning of your equipment to help get your
equipment up and running. It also provides essential
maintenance and troubleshooting information to assist the
operation and prolong the lifetime of your equipment.
This document covers the Sentinel Totus 2 D-ERV series
detailed in the following table.
Table 1: Products Covered by this Document
Model Number Description
TOTUS2MINI Totus 2 Mini
TOTUS2MINI/CP Totus 2 Mini/ Constant Pressure
TOTUS2MIDI Totus 2 Midi
TOTUS2MIDI/CP Totus 2 Midi/Constant Pressure
TOTUS2MAXI Totus 2 Maxi
TOTUS2MAXI/CP Totus 2 Maxi/Constant Pressure
See Technical Specification for details of these models.
About this Document
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
3
CONTENTS
Product Description 4
Sentinel Totus 2 D-ERV ............................................................... 4
Technical Specification 6
Sentinel Totus 2 D-ERV Technical Specification .......................... 6
Commissioning Record ................................................................ 6
Dimensions.................................................................................. 7
Installation 11
Installing Your Energy Recovery Ventilation System ...................11
Before Installing Your Equipment................................................12
Physical Installation ....................................................................13
Electrical Installation ...................................................................17
Switching On/Off.........................................................................23
Commissioning 24
Commissioning Your Energy Recovery Ventilation System.........24
Commissioning Screens .............................................................26
The Settings Code ......................................................................37
Writing Down the Settings Code .................................................38
Default Settings ..........................................................................39
Restoring Settings 40
Restore Settings Screens ...........................................................40
Operation and Monitoring 42
About Operation and Monitoring .................................................42
Status Monitoring Screens ..........................................................42
Maintenance 46
Caring for Your Unit ....................................................................46
3-Monthly Maintenance ..............................................................46
12-Monthly Maintenance ............................................................46
5-Yearly Maintenance .................................................................46
Removal/Replacement of Parts 47
Cover Removal/Replacement .....................................................47
Filter Removal/Replacement (Roof-Mounted) .............................49
Filter Removal/Replacement (Ceiling-Mounted) ..........................49
Motor Removal/Replacement (Roof-Mounted) ............................50
Motor Removal/Replacement (Ceiling-Mounted).........................51
Float Switch Removal/Replacement (Roof-Mounted) ..................52
Float Switch Removal/Replacement (Ceiling-Mounted) ..............53
Condensate Pump Removal/Replacement (Roof-Mounted) ........54
Condensate Pump Removal/Replacement (Ceiling-Mounted) ....55
Filter Removal/Replacement (Maxi)……………..………………....56
List of Spares .............................................................................57
Troubleshooting 58
Diagnosing a Problem ................................................................58
Diagnostic Codes .......................................................................58
Fault LED/Status Relay ..............................................................59
Power Supply Troubleshooting ...................................................59
Airflow/Temperature Troubleshooting .........................................60
Condensate Troubleshooting ......................................................61
Appendix A: Glossary 62
Terms and Abbreviations ........................................................... 62
Appendix B: Options and Accessories 63
Sentinel Totus ............................................................................ 63
Appendix C: Main Controller PCB Terminals 64
Terminals ................................................................................... 64
Product Description
4
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Product Description
Sentinel Totus 2 D-ERV
Sentinel Totus 2 Demand Energy Recovery Ventilation (D-ERV) is a heat recovery demand ventilation
system designed to meet modern building management and control principles.
Employing a range of sensors to manage the system, demand is typically sensed by PIR, temperature,
humidity, air quality, carbon dioxide sensors or other types of Vent-Axia proprietary sensors (see Appendix B:
Options and Accessories on page 63 for details).
It can respond to the ventilation requirements of a room by providing airflow only when it is required and at the
level that is required, using only the energy that is needed, while recovering maximum energy from the
extracted air and transferring it to the fresh supply air. This overcomes many of the drawbacks encountered with
traditional fixed volume ventilation systems, which operate irrespective of the occupancy of the room, leading to
over ventilation and a wasteful use of energy.
Note that the unit contains heaters, which automatically prevent the heat recovery cell from freezing and can
also be used to “Top Up” the air temperature to the room.
Models
Mini designed to operate at airflows of up to 650 m3/hr at 150 Pa.
Midi designed to operate at airflows of up to 1000 m3/hr at 150 Pa.
Maxi designed to operate at airflows of up to 2000 m3/hr at 150 Pa
Figure 1: Sentinel Totus Mini & Midi 2 D-ERV
External
Ambient Air
I
nternal
Room Air
Commissioning
Interface
Main Controller
PCB Access Panel
Condensate
Drain
Heaters
Counter-flow Cell
Summer Bypass
DC Motors
T4
T1
T1-T4 = internal
temperature
sensors
Filter
Water Pump
CP Switch
(Optional)
Filter
T3
T2
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
5
Figure 2: Sentinel Totus 2 Maxi D-ERV
T3
T2
T1
T4
Counter-flow Cell
Heaters
DC Motor
Filter
Summer Bypass
Entry Panel
Main
Controller
PCB Access
Panel
Access
Panel
I
nternal
Room Air
External
Ambient Air
T1-T4 = internal
temperature
sensors
Technical Specification
6
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Technical Specification
Sentinel Totus 2 D-ERV Technical Specification
Performance Mini Midi Maxi
Airflow (nominal)
650 m3/hr at 150 Pa 1000 m3/hr at 150 Pa 2000 m3/hr at 150 Pa
Power
AC Voltage Input
220-240 V ac (single phase)
AC Frequency Input
50/60 Hz nominal
Supply Fuse or Cct Breaker
16 A 16 A 32A
Rated Current
12 A 12 A 20A
Rated Power
1825 W 2500 W 5000W
Total Fan Power (max.)
325 W 500 W 1000W
Total Frost Heater (max.)
1.5 kW 2 kW 4kW
Power (standby)
0.6 W 0.6 W 0.6 W
DC Voltage Output
24 V dc (18-30 V dc) at 350 mA (max.) for switches and sensors
Battery
See Table 6: 5 12-Monthly Maintenance on page 46
Product Fuses
Power PCB
See Table 11: Internal Fuse Values and Types on page 60
Main Controller PCB
See Table 11: Internal Fuse Values and Types on page 60
Physical
Height/Width/Depth
Mini, Midi & Maxi see page 7 and 8
Weight
145 kg 167 kg 250 kg
Environmental
IP Rating - Unit
IPX4
IP Rating - Commissioning
Interface
IP42
Operating Temperature
-10°C to +40°C
Operating Humidity
0% to 95% (non-condensing) – weatherproof unit option
Storage Temperature
-10°C to +40°C
Storage Humidity
0% to 95% (non-condensing)
Condensate Pump
12 m max head, 25 m max horizontal distance, but 150 max head X distance
Software Version
V25
For all other technical details, please see the Product Catalogue or our website at www.vent-axia.com.
Commissioning Record
Record the unit commissioning settings here.
Date Settings Code Who
For details of the settings code, see
The Settings Code on page 37.
Technical Specification
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
7
Dimensions
Model
Dimensions (mm)
a b c d e f g h i j k l m n o p q r
Mini 1800 1920 352 940 900 450 250 - 60 142 174 962 153 42 188 375 72 1656
Midi 1900 2020 350 1290 1250 538 400 250 60 220 175 1315 147 47 332 526 72 1758
Maxi 1800 1925 660 1212 1130 530 400 - 60 710 578 - - - - 635 - -
Mini
Midi
Technical Specification
8
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Maxi
Figure 3: Unit Dimensions for Mini, Midi & Maxi
Technical Specification
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
9
Filter and Control Box Access
Technical Specification
10
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
MAXI
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
11
Installation
Installing Your Energy Recovery Ventilation System
WARNING
THIS EQUIPMENT PRESENTS ELECTRICAL, MECHANICAL AND NOISE HAZARDS. FAILURE TO USE SAFE
WORKING PRACTICES AND OBSERVE THE RELEVANT REGULATIONS MAY RESULT IN DEATH OR
SERIOUS INJURY.
The following instructions are intended to help prevent and/or minimize potential hazards and should be carried
out only by a qualified electrician and installer.
How to Install Your Energy Recovery Ventilation System
The figure below summarises the instructions given in the following paragraphs.
Figure 4: Installation Overview
Before Installing Your Equipment
1. Read Safety Notices
2. Inspect the Unit
3. Lift and Move the Unit Safely
4. Store the Unit (if Required)
Physical Installation
1. Check Site Requirements
2. Fit the Unit (Roof or Ceiling)
3. Ensure Unit Access
4. Attach Ducting
5. Connect the Condensate Drain
Electrical Installation
1. Connect Switches and Sensors
2. Connect the Power Supply
3. Connect the Commissioning Interface
Switching On/Off
1. Switch On
PLEASE READ IMPORTANT
SAFETY INFORMATION PROVIDED
ON THE INSIDE COVER OF THIS
MANUAL AND OBSERVE ALL
WARNING AND SAFETY LABELS
PROVIDED ON THE EQUIPMENT
FOR DETAILS OF EACH STEP,
SEE THE FOLLOWING HEADINGS
Installation
12
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Before Installing Your Equipment
Read Safety Notices
The equipment must be handled carefully and thoughtfully to prevent safety hazards and damage.
Ensure the personnel designated to install the unit have the appropriate skills and knowledge.
Before commencing installation, please read and observe the safety notices given in the inside front cover of
this manual.
Inspect the Unit
The unit is supplied on a pallet, shrink-wrapped in polythene. When taking delivery of the unit, check the items
delivered against the enclosed delivery note. Inspect the unit for damage in transit. If in doubt, contact Customer
Services.
Lift and Move the Unit Safely
This weight of this unit is detailed in the Technical Specification on page 6. Always use appropriate lifting
techniques and appliances when moving heavy equipment. A forklift truck, crane or similar lifting gear is
required to lift and move the unit. Support the unit under the 3 support points, as shown in figures 5, 6.
Store the Unit (if Required)
If the unit is to be stored for a long period of time the fan impellers must be rotated by hand at monthly intervals
to prevent hardening of the lubricant and corrosion or static indentation of the bearings.
If the unit has been stored, it is recommended that before installation, the resistance to earth should be
measured. If found to be less than 2 MΩ, the unit should be left in a warn dry room for 24 hours and remeasured before applying mains voltage. If the resistance is still less than 2 MΩ, there is likely to be a fault.
The unit must be stored in clean, dry conditions.
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
13
Physical Installation
Check Site Requirements
Before installing the unit, check that the physical and environmental conditions for the site meet, or exceed, the
requirements detailed in the Technical specification on page 6.
DO NOT install these fans in areas where the following may be present:
Excessive oil or grease laden atmosphere.
Corrosive or flammable gases, fluids or vapours.
Possible obstructions that will hinder removal.
Fit the Unit (Roof or Ceiling)
The Mini or Midi units MUST be mounted horizontally to ensure drainage of the condensate tray. DO
NOT mount this unit vertically. The Maxi unit must be installed on a 2° slope. See diagrams below.
Do not use this unit as a support for any other equipment.
Always use the appropriate fixings, supports, studs and hangers; and ensure that the unit is firmly and
safely located.
Roof Mounting the Unit
The suggested method for roof mounting is to support the unit on six blocks. The support blocks should provide
150 mm clearance between the unit and the roof, thereby allowing sufficient room for the fitting of the
weatherproof cowls, as shown in the figure below. The blocks should be positioned directly below the support
brackets provided for ceiling mounting.
Unit to be Level in All Directions
Floor Level
Figure 5: Unit Roof Mounted for Mini & Midi (Recommended)
Mount on 4 blocks placed under mounting brackets on
unit. Minimum of 150mm from Floor
level
Installation
14
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Figure 6: Unit floor or Roof Mounted for Maxi (Recommended)
If required, weatherproof cowls (see Appendix B: Options and Accessories on page 63) can be fitted at the
ambient end (external intake and exhaust).
Note
Any exposed ductwork must be insulated if the Totus 2 is mounted on a roof or other external position.
Fitting the Weatherproof Cowl (If Required)
1. Ensure that the Totus 2 has been mounted with sufficient clearance available (150 mm) to fit the
weatherproof cowls at the external ambient air end of the unit.
Note
The weatherproof cowls are fitted at the same end as the motors.
2. Position each cowl over the flange around each opening, as shown in the figure below. Use sealant to seal
the flange to the cowl to maintain the internal pressure and prevent water ingress.
3. Secure each cowl to the chassis using 6 x no. 10 self-tapping screws.
Drill holes (
ᶲ
4)
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
15
Suspending the Unit from a Ceiling – Mini & Midi
The unit is designed for stationary use and MUST always be mounted horizontally to ensure drainage of the
condensate tray. DO NOT mount this unit vertically.
The unit provides six brackets, one at each corner and two half-way along the length of the unit, from which
to suspended it.
Ensure the drop rods & their attachment to the ceiling are of sufficient strength.
Figure7: Unit Suspended from Ceiling for Mini & Midi
Ensure Unit Access
Ensure the unit is installed in such a way as to allow access to the control unit, connectors and filters (see Filter
Removal/Replacement (Ceiling-Mounted) on page 49). Check the dimensions of the unit detailed in the
Technical Specification.
Leave a gap of 500 mm to enable the Control Panel to be removed and to gain access to the Commissioning
Interface and the Main Controller PCB.
Figure 8: Control Panel Access
On the opposite side of the unit a gap of 75 mm should be left to enable someone to be able to release the
thumb catches when removing the top or bottom covers (see Cover Removal/Replacement on page 47).
4 support brackets and rods
suspend the unit from the ceiling
Installation
16
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Suspending the Unit from a Ceiling – Maxi
The unit is designed for stationary use and MUST always be mounted horizontally with a 2° tilt on the long side
the motor end should be lower ) and horizontally with no tilt on the short side, to ensure drainage of the
condensate tray. DO NOT mount this unit vertically.
The unit must be suspended on six drop-rods and cradle are of sufficient strength to support the weight of the
unit. Align that the drop-rods with the arrows with the sides of the units and ensure they are mounted 350 mm
away from both the sides of the unit to allow opening of access panels.
Figure 9: Unit suspended from ceiling for Maxi (Recommended)
Ensure Unit Access
Ensure the unit is installed in such a way to allow access to the control unit and connectors check the
dimensions of the unit detailed in the technical specification. Note that the control door requires a 350 mm
space in order to open fully.
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
17
Attach Ducting
WARNING
IF THIS EQUIPMENT IS RUN WITHOUT DUCTING FITTED, THERE IS A POTENTIAL HAZARD FROM
ROTATING PARTS THAT CAN BE REACHED DURING OPERATION.
Fit appropriate ducting to the unit in accordance with the supplied drawings for the building.
Fit flexible connectors adjacent to the unit. Ensure they are taut.
When fitting clamping bands to flexible connectors, ensure that the flexible connectors are pulled tight and the
ducts are not misaligned.
The unit provide rectangular ducting interfaces. Fit adapters as necessary to connect to ducting with a circular
cross-section.
In order to facilitate access to, and replacement of, the extract motor on the external/ambient side, a suitable,
easily disconnected section of ducting should be fitted, if ducting is required, in installations where the unit is
mounted internally.
Connect the Condensate Drain
The unit should be mounted horizontally to ensure drainage of the condensate drain.
Use 10 mm pipe or flexible hose to connect to the condensate drain in order to carry away any water produced
because of internal condensation. Ensure that the water is routed to a suitable outlet, which can be up to 12 m
above the unit as there is an internal pump. This pipe should be insulated if installed in an area that could
freeze, or fit a proprietary frost pipe heater.
Electrical Installation
Connect Switches and Sensors
Connect any required switches and/or sensors as recommended by the system designer in the drawings
supplied by him.
A 24 V dc nominal (18-30 V dc) supply at 350 mA max is provided for powering switches and sensors, etc.
Analogue signal returns must be 0-10 V dc with common ground for the instrument and cable screen at the
control board.
The terminal connections provided by the Main Controller PCB for connecting to switches, sensors, etc., are
shown below. Other terminals are connected as required at the factory. DO NOT disconnect any factory fitted
connections.
Installation
18
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Figure 10: Main Controller PCB Terminal Connections
0-10V Inputs
Outputs
Factory Fitted
Factory Fitted
Factory Fitted
Switched Inputs
Factory Fitted
Note:
Both N/C and N/O
states are with the power off.
24V
I/P
0V
24V dc: Output to drive sensor, etc.
I/P: 0 – 10V dc input from sensor, etc.
0V dc: Zero volt or common line
0V dc: Zero volt or common line
I/P: 24V dc input from switch, etc.
(10V dc minimum required)
24V dc: Output to switch, etc.
0V
I/P
24V
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
19
Connect the Power Supply
WARNINGS
1. MAINS SUPPLY VOLTAGES (220-240 V AC) ARE PRESENT IN THIS EQUIPMENT WHICH MAY CAUSE
DEATH OR SERIOUS INJURY BY ELECTRIC SHOCK. ONLY A QUALIFIED ELECTRICIAN OR INSTALLER
SHOULD CONNECT THE POWER SUPPLY TO THIS UNIT.
2. THIS UNIT MUST BE CORRECTLY EARTHED IN ORDER TO PROVIDE OVERCURRENT AND EARTH
FAULT PROTECTION.
3. DO NOT OVERLOAD WALL OUTLETS AND EXTENSION CABLES AS THIS MAY RESULT IN A RISK OF
FIRE OR ELECTRIC SHOCK.
4. ENSURE THE UNIT ISOLATOR IS SET TO OFF AND LOCKED IN POSITION BEFORE REMOVING THE
UNIT COVERS.
Check the Technical Specification for the voltage, current and fusing information relevant to this product.
This unit is designed for operation either from a single-phase alternating current source (220-240 V ac) or from
three single-phase alternating current sources (220-240 V ac) that will allow you to distribute the current for the
heaters, fans and unit through three separate outlets and cables, if required.
Wiring to the unit should be routed via a double-pole isolating switch (in accordance with local electrical wiring
regulations) adjacent to the unit, or taken from the distribution board.
Ensure suspension between power and control cable.
• Mini & Midi
To connect the power supply:
1. Ensure the local ac power supply is isolated at the distribution board before connecting the supply cable.
2. Ensure the correct fuse type, or circuit breaker has been fitted to the ac power input supply. A means of
disconnection should also be provided in the fixed wiring.
3. To prevent the equipment being accidentally switched on while you are away from it the unit isolator may
be locked in position. Pull out the yellow inner section of the isolator switch to lock the isolator in position,
revealing a hole through which a padlock, or other lockable device, may be inserted.
4. Remove the unit Control Panel cover by unscrewing the six securing screws.
Figure 11: Control Panel Cover Removal
5. Remove the High Voltage Cover by unscrewing the two securing screws.
Installation
20
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Figure 12: High Voltage Cover Removal
6. This high voltage screw terminal block is now uncovered to enable you to connect the ac power cable(s).
Figure 13: High Voltage Terminal Block
In countries where the required supply current is not available from a single phase supply, the heaters can be
wired up to separate single phase supplies which are to be connected according to local regulations.
Using One Single-Phase Power Supply
7. Route a suitably rated round power cable through the cable gland provided on the bottom of the Control
Panel directly below the High Voltage Terminal Block. A 7-10 mm diameter cable should be used to
ensure sufficient grip by the cable gland. The gland MUST be sealed properly to maintain the IP rating of
the unit.
8. Connect the Earth (green and yellow) wire to the Earth terminal , make sure the Earth wire is at least
50mm longer the others. Connect the Live (brown) wire to all three terminals L1, L2 and L3. Connect the
Neutral (blue) wire to terminals N1, N2 and N3, as shown in the figure below (wire colours apply to UK
cables). If the heaters are not required then omit the links to L2, L3, and N2, N3.
Figure 14: Single-phase Terminal Connections
9. Connect the other end of the power cable to a power supply outlet or distribution board.
When replacing the cover ensure the earth bonding lead is attached to the cover.
Unit Isolator
High Voltage Cover
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
21
Using Three Single-Phase Power Supplies (Remove the links to L2, L3 and N2, N3)
10. Route three suitably rated round power cables through separate cable glands on the bottom of the Control
Panel (additional holes are provided for routing of power and sensor cables, as required).
A 7-10 mm diameter cable should be used to ensure sufficient grip by the cable gland. The gland MUST
be sealed properly to maintain the IP rating of the unit.
11. Connect the three Earth (green and yellow) wires (one from each cable) to the Earth terminal . Make
sure the Earth wires are at least 50mm longer the others. Connect the Live (brown) wires from each cable
to a separate terminal L1, L2 or L3. Connect the Neutral (blue) wire to terminals N1, N2 or N3 (ENSURE
THAT WIRES FROM THE SAME CABLE ARE CONNECTED TO THE SAME NUMBERED TERMINAL,
I.E. CONNECT CABLE 1 TO TERMINALS L1 AND N1. DO NOT CROSS THE LIVE AND NEUTRAL
SUPPLIES), as shown in the diagram below (wire colours apply to UK cables).
Figure15: 3x Single-phase Terminal Connections
12. Connect the other ends of the three power cables to three separate power supply outlets or distribution
board terminals.
• Maxi
• Ensure the local ac power supply is isolated before connecting the supply cable.
• Ensure the correct fuse type, or circuit breaker has been fitted to the ac power input supply. A means
of disconnection should also be provided in the fixed wiring.
• Connect a suitable round power cable through the cable gland provided. A 7-10 mm diameter cable
should be used to ensure sufficient grip by the cable gland. The gland MUST be sealed properly to
maintain the IP rating of the unit. Open the controls hinged door and feed the cable through the unit to
the Main Controller PCB located in the controls enclosure. It may be necessary to remove the gland
plate in order to feed the cable through - unscrew the six fixing screws securing the gland plate to the
chassis.
• Connect the L/N/E supply to the terminals as identified on the DIN rail, see figure below.
Figure16: Power Supply Connections
• Connect the other end of the cable to the main power supply outlet.
• Ensure the unit remains isolated until all external connections are made.
Earthing
Nut
Gland
Plate
Installation
22
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Connect the Commissioning Interface
The Commissioning Interface must be mounted indoors or inside the control enclosure.
Ensure the Commissioning Interface is accessible for commissioning and maintenance. It is recommended that
it be mounted near to the main supply isolator, if not inside the control enclosure, since the unit must be
switched off and on to access the commissioning screen.
To connect the Commissioning Interface:
1. Open the Commissioning Interface casing to gain access to the interior by inserting a small flat-bladed
screwdriver in the slot at the base of the case. Then separate the front and rear halves at the top.
Figure17: Opening the Commissioning Interface
2. Mark and drill the holes for the two fixing screws supplied with the mounting kit. Fix the wall plugs and
screws to the wall, leaving the screw heads sufficiently proud of the wall to enable the Commissioning
Interface to be attached by lining up the holes in the rear of the casing with the screws and resting the
case on the screws.
3. Use 4-core 0.5 mm2 DEF STAN 61-12 Part 5 Type A cable, or equivalent, to connect the Commissioning
Interface to the Main Controller PCB. The diameter of the cable used must not exceed 4 mm in order to
pass through the opening of the Commissioning Interface’s plastic housing. The length of the cable
should not exceed 10 m. Screened cable is recommended, with screen connected to the chassis.
Unscreened cable may be used if there is no threat from external electrical interference.
Figure18: Commissioning Interface Connections
4. Connect pins 1-4 on the Commissioning Interface terminal block to the corresponding pins 1-4 on the Main
Controller PCB, see Figure 10: Main Controller PCB Terminal Connections, i.e. connect Commissioning
Interface pins 1 to 87, 2 to 86, 3 to 85 and 4 to 84.
5. Re-assemble the front and rear halves of the Commissioning Interface Casing by first re-engaging the two
lugs and slots along the top. Then, press together the bottom edges of the two halves, which should close
with an audible click.
Installation
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
23
Switching On/Off
Switch On
The following procedure assumes that all necessary installation actions have been performed in accordance
with the instructions given in this section of the manual.
To switch the unit on:
1. Ensure that all top and bottom covers are fitted and properly secured (see Cover Removal/Replacement
on page 47).
2. Switch on the power at the mains outlet feeding the Sentinel unit.
3. At the unit’s cable entry panel, turn the isolator switch to position 1 (ON).
4. Observe the Commissioning Interface. Following switch-on, the Commissioning Interface displays a start-
up screen. The start-up screen displays software version number.
Vent-Axia
Sentinel HR V***
5. Ensure that the Status LED on the Commissioning Interface is green, indicating that the unit is operating
normally. The unit will commence operation according to the stored parameters.
6. If commissioning is required, or if the parameters are to be altered, see the following Commissioning
section on page 24.
Switching Off
To switch the unit off:
1. At the unit’s cable entry panel, turn the isolator switch to position 0 (OFF).
2. If you are intending to carry out work or maintenance inside the unit, switch off the power at the mains
outlet supplying the unit before you remove the covers.
3. To prevent the equipment being accidentally switched on while you are away from it the unit isolator may
be locked in position. Pull out the yellow inner section of the isolator switch to lock the isolator in position,
revealing a hole through which a padlock, or other lockable device, may be inserted.
Note
All commissioning settings are permanently stored in non-volatile memory and, therefore, retained in
the event of a shutdown or power failure.
Commissioning
24
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Commissioning
Commissioning Your Energy Recovery Ventilation System
The instructions in this section are intended to provides configuration and operation information for setting up
the equipment. In the event of problems, see Troubleshooting.
Commissioning Interface
As delivered the Commissioning Interface is fitted to the unit in a weatherproof enclosure. Alternatively it can be
relocated to an internal position within 10 m. The Commissioning Interface provides the user interface for
commissioning and monitoring purposes.
Figure19: Commissioning Interface
Display
The main display is a 16 character, 2-line liquid crystal display (LCD) with automatic backlight, which is turned
off to minimise power consumption when the unit is operational (see Commissioning Screens on page 26).
Vent-Axia
Sentinel HR V***
Push-buttons
Four push-buttons on the Commissioning Interface provide the controls for configuring and monitoring the unit.
Table 2: Commissioning Interface Push-buttons
Push-button Function
(Set)
Press to adjust settings and move to next menu item.
(Up)
Press to go to the above screen or to increase a parameter value.
Press and hold for fast response.
(Down)
Press to go to the next screen or to decrease a parameter value.
Press and hold for fast response.
(Enter)
Press to enter or move to next menu item.
Status LED
A 3-way, multi-colour LED on the Commissioning Interface displays the status of the unit. A similar LED is
provided on the side of the unit to provide a local indication of the unit status in the event that the
Commissioning Interface is located remotely.
Display
Push-buttons
Status LED
Commissioning
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
25
Table 3: Commissioning Interface Status LED
LED Colour Function
Green
The unit is healthy and operating normally.
Red/Green Flashing
The unit requires the filters to be changed. The unit will continue to
operate normally.
See Fault LED/Status Relay on page 59.
Red Flashing
The unit has a fault that should be investigated immediately. Operation
of the unit is stopped.
See Fault LED/Status Relay on page 59.
How to Commission Your Energy Recovery Ventilation System
The factory default operating mode will be either Constant Pressure or MIN-MAX and always on.
To commission your Energy Recovery Ventilation System,
1. Ensure the unit is switched on, the start-up screen has been displayed and that the Operating and
Monitoring Screens (Running Display) are displayed on the Commissioning Interface.
2. Press and hold the (Enter) push-button for 5 seconds to access the Commissioning Screens.
Note
All commissioning settings are permanently stored in non-volatile memory and, therefore, retained in
the event of a shutdown or power failure.
Commissioning
26
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Commissioning Screens
When the unit is switched on (see Switching On on page 23), the following Commissioning Interface screens
are available for monitoring and configuring the unit (default values shown where applicable).
Figure 20: Commissioning Interface – Commissioning Screens
See page 40
Not described in this document
Commissioning
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
27
Commissioning Screens
The commissioning screens are available when the (Enter) push-button is pressed and held for 5 seconds
when the Running Display is shown. These screens enable the unit to be configured to suit the installation
requirements of the customer.
IMPORTANT NOTE: the unit runs for 10 minutes before taking any temperature reading to allow the
flows and temperatures to settle. This can cause “problems” when commissioning if not taken into
account.
Language Screen
The Language screen displays the language option that is set for the software.
Language
English
Press (Set) and then use the (Up) and (Down) push-buttons to change the language setting.
Press (Set) again to enter the new setting and use the (Up) to move down to the next screen.
Dampers Screen
Powered Back draft dampers may be fitted that close when the unit goes to standby to prevent draughts. The
Dampers screen displays whether dampers are wired directly to the unit (to terminals 26-31). This option is NOT
accessible in Constant Pressure mode (Fitted is changed to Not Fitted if Constant Pressure mode is later
selected).
Dampers
Not Fitted
Press (Set) and then use the (Up) and (Down) push-buttons to select one of the two available
options (Fitted or Not Fitted). Default value shown.
Press (Set) again to enter the new setting and use the (Up) to move down to the next screen.
Heater Run On Screen
The Heater Run On screen enables a time to be set for the fan motors to keep running when an external duct
heater, if fitted, is turned off to allow cooling airflow to dissipate the heat.
Heater Run On
Disabled
Press (Set) and then use the (Up) and (Down) push-buttons to select one of the two available
options (Enabled or Disabled). Default value shown.
If Enabled is selected, press (Set) again and then use the (Up) and (Down) push-buttons to adjust
the time setting in seconds (30 - 180).
Press (Set) again to enter the new setting and move down to the next screen.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Heat Balance Screen
The Heat Balance Screen allows the anti-frost heaters to be used to top up the temperature of the supply air to
the room. The heat exchanger is between 80% and 95% efficient depending on the model and flow rate. Thus if
the ambient is 10C and the room is 20C the incoming air should be about 18 – 19C. In certain applications it
may be required to increase this temperature. The default is OFF. This setting allows you to switch this control
to BALANCE the supply temperature to the extract temperature of the room or to set a specific supply air
temperature between 10C and 30C as a target for the supply temperature.
The Totus is not able to cool the air; the heating is done by electric coils fitted to the unit and this may not be the
preferred method of heating by the operator of the building.
If the anti-frost logic is triggered then it will take priority over this control in order to prevent freezing of the heat
exchanger.
Heat Balance
Off
Press (Set) and then use the (Up) and (Down) push-buttons to select the available options (Off or
10C to 30C). Default value shown.
Press (Set) again to enter the new setting and move down to the next screen.
Flow Imbalance (for Frost Protection) Screen
The Flow Imbalance screen enables a proportional change of supply and extract in Frost Protection mode and
comfort settings.
Note:
For setting an imbalanced airflow for other reasons, see Flow Balance Screen on page 32.
Flow Imbalance
Disabled
Press (Set) and then use the (Up) and (Down) push-buttons to select one of the available options
(Enabled or Disabled). Default value shown.
Press (Set) again to enter the new setting and move down to the next screen.
Frost Protection Screen
The Frost Protection screen displays options for the protection of the unit against frost. Protection measures
may be factory set, in which case no selectable options will be available.
Frost Protection
Automatic
Frost protection is set to Automatic if heaters are fitted to the unit, otherwise Flow Imbalance is used, if
enabled. If neither of the previous two options are enabled Bypass Mode is used.
Automatic - the default setting, if air intake heaters are fitted. In this mode when the incoming air is less
than -1C and the air being discharged to atmosphere is less than 3C the first heater starts. Every 10 mins
the temperatures are checked, if the air into the heat recovery cell is still less than -1C then the second
heater is started. The heaters are sized so that the unit will operate down to -7C at full air flow before frost
is likely to start. The air flows will continue operating at the settings called for by the control system.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
29
Note:
The temperatures of Int -1C measured at the unit intake from ambient and Ext 03C measured at the
unit discharge to ambient have been established after extensive laboratory tests and have been
shown to prevent the heat recovery cell from freezing. It is strongly recommended that these
default figures are used. The consequences of the heat exchanger freezing usually includes a
severe water leak when it eventually defrosts and consequential damage to the property.
Flow Imbalance - in this mode the heaters are not used. If Flow Imbalance has been enabled then at the
same trigger temperatures as above, the extract fan begins to speed up until it maintains the -1C
temperature. If this is not achieved when it reaches the boost speed then the supply fan begins to slow.
Bypass Mode - if Flow Imbalance has not been enabled then, when the trigger temperature are reached,
the bypass opens and the flow goes to minimum speed. An error message is displayed. See Status
Display on page 42.
Note:
The temperature that triggers the operation of the anti-frost features is adjustable.
Press (Set) and then use the (Up) and (Down) push-buttons to select the internal and external
trigger temperatures.
Frost Protection
Int -1C Ext 03C
Filter Screen
The Filter screen displays the days to go before replacement of the fan filters is necessary. The number of days
runs down from the value selected in the Filter Life screen (see below). There are no selectable options on this
screen.
Filter
Days To Go 091
When the time runs down to 000, a fan filter alarm will be displayed, the filters must be replaced and the screen
displays Replaced/No/Yes. Use the (Up) and (Down) push-buttons to select Yes and reset the timer.
Press (Set) to move down to the next screen.
Filter Life Screen
The Filter Life screen displays the days to go before replacement of the fan filters is necessary. The number of
days is set depending on the environment in which the unit will be used.
Filter Life
Industrial
Press (Set) and then use the (Up) and (Down) push-buttons to select the type of filter fitted
(Industrial (091), Urban (182) or Rural (365)).
Press (Set) again to enter the new setting and move down to the next screen.
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10
Commissioning
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Sensors Screen
The Sensors screen detects for any proportional environmental sensors connected to the unit when the unit is
first switched on. This happens automatically when the Control Board is new or has been restored to
‘uncommissioned’. The screen may display one of the following options Checking/None, Constant Pressure,
Proportional, BMS alternating with Update?, depending on the sensor(s) detected.
Sensors
None
The priority is as follows:
If a pressure sensor has been factory fitted, then Constant Pressure mode is implemented.
If a CO2 sensor has been factory fitted, then Proportional mode is assumed and the unit will ‘look’ for other
sensors. If sensor(s) found then Proportional mode is implemented.
If a BMS 0 -10 V input is found then BMS mode is implemented.
If a BMS enable input found (closed) then BMS mode is implemented.
Otherwise, if none of the above conditions are detected, the default Min Max mode is implemented.
If the installation wiring is incomplete at commissioning time, then either fit resistors between +24V and the
required sensor inputs or re-do the setup later as described below.
When the operating mode has been set, the display shows the appropriate sensor output(s). The operating
mode can be changed manually and this will be the way in which the Totus will run (e.g. Constant Pressure
might be ignored and Comfort Setting selected).
The set-up can be re-done by pressing (Set) while Update? is displayed on the Sensors display.
Min Max can be set to Proportional or BMS.
Proportional can have different sensors or go to BMS or to Min Max when no sensors are found.
If the operating mode has been set to BMS, Constant Pressure or Comfort Setting, then set it to Proportional or
Min Max to access the set-up. Remember to set it back on completion.
Press (Set) to move down to the next screen.
Operating Mode Screen
The Operating Mode screen displays the mode of the unit when running in normal operation. This may be
enabled automatically by the detection of relevant sensors, or may be manually adjusted. Note that some
options on other screens may be affected by the choice of operating mode.
Operating Mode
Min Max
Press (Set) and then use the (Up) and (Down) push-buttons to select one of the available options
(Min Max, BMS, Proportional, Constant Pressure or ITC).
Min Max – a manually selectable option. In this mode, the unit responds to switch inputs (time, thermostat,
PIR, humidistat or AQS switch). The switch input causes the fan speed to change from the minimum
(trickle) to the maximum (boost) speed.
BMS – a manually selectable option. In this mode, an external Building Management System is used to
proportionally control the unit fan speed. When this mode is selected, the On Off Control mode is
automatically set to BMS Enable.
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13
Commissioning
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
31
Proportional – a manually selectable option. In this mode, the unit fan speed responds proportionately to
either the CO2, temperature, humidity sensor proportional inputs or the remote / local inputs.
Constant Pressure – entered automatically if a pressure sensor is detected on start-up. In this mode, the
fan speed responds to maintain a constant fan inlet negative pressure as a result of downstream duct
resistance variations. A pressure sensor with a 0-10 V proportional input is used to drive the fan speed.
ITC – a manually selectable option. In this Internal Temperature Control mode, the exhaust air
temperature (T4) is compared against a user-settable room temperature.
Press (Set) to move down to the next screen.
On Off Control Screen
The On Off Control screen displays the method by which the unit is taken out of standby mode.
On Off Control
Always On
Press (Set) and then use the (Up) and (Down) push-buttons to select one of the available options
(Always On, Switch Enable, BMS Enable, Internal Clock or Internal Clock +). Default value shown.
Always On – the unit is always operational and does not run on standby (typically used in environments
that are occupied 24 hours a day, such as hospitals).
BMS Enable – the unit may be turned on by a Building Management System (typically a computercontrolled relay). This may be configured as a time controller or use other switches or sensors to control
the turn on of the unit. When BMS is selected as the Operating Mode, BMS Enable is automatically
selected as the On Off Control and no further options are selectable.
Switch Enable – the unit may be turned on by means of a physical switch (typically a wall switch in the
room). When not turned on, the unit will be in standby mode.
Internal Clock – the unit may be turned on according to a timer that may be set by additional screens.
Press (Set) and then use the (Up) and (Down) push-buttons to select an on and off time for
each day of the week. Minimum run or stop time is 10 mins. If set closer than this ‘!’ is displayed and the
switch action (on to off or off to on) is ignored. No other device may change the speed when the unit is off
because of this clock setting.
Internal Clock+ – Closing Switch 1 (see Figure 10 on page 18 ) input with Internal Clock + overrides the
time clock (as does pressing the (Enter) push-button when Day Time is displayed).
Day On Off
Mon 07:00 18:00
To finish, press the (Enter) push-button when day flashes or after setting the last off time for Sunday.
Press (Set) to move down to the next screen.
Minimum Speed Screen
When in Min Max mode, the Minimum Speed screen enables the minimum speed for the fan motors to be set.
Minimum Speed
020%
Press (Set) and then use the (Up) and (Down) push-buttons to select a percentage (0% to
(maximum speed -5%)). The minimum that may be set is 1%, if Heater Run On is enabled.
Press
(Set) again to enter the new setting and move down to the next screen.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Maximum Speed Screen
When in Min Max mode, the Maximum Speed screen enables the maximum speed for the fan motors to be set.
Maximum Speed
080%
Press (Set) and then use the (Up) and (Down) push-buttons to select a percentage (Minimum +5%
to 100%).
Press (Set) again to enter the new setting and move down to the next screen.
Flow Balance Screen
The Flow Balance screen enables the balance between intake and extract motor speed to be adjusted. An
imbalance may be set between the supply and extract airflow, if required. The motors are allowed to run at
different speeds, enabling a room to be kept at positive or negative pressure. Note that 100% referred to here is
100% of the set speed. The adjustment available is from 80% to 100% of that set speed.
Flow Balance
Int 100%Ext 100%
Press (Set) and then use the (Up) and (Down) push-buttons to set the Intake percentage (80 to
100%).
Press (Set) and then use the (Up) and (Down) push-buttons to set the Extract percentage (80 to
100%). 100% reduced in proportion when motor maximum reached.
Press (Set) again to enter the new setting and move down to the next screen.
ITC Parameters Screen
This ITC Parameters screen is only displayed if Internal Temperature Control (ITC) mode is selected at the
Operating Mode screen (see Operating Mode Screen on page 30). The ITC screen enables the Internal
Temperature Control mode settings, measure by an internal temperature sensor, to be adjusted.
ITC
SetPoint 22C
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the temperature (in degrees C)
for the ITC SetPoint (10 to 35). This is the target room temperature.
Press (Set) again to enter the new setting and move down to the next screen.
ITC
Passband 10C
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the temperature (in degrees C)
for the ITC Passband (02 to 50). This is the range of temperatures that proportionally control the motor speed
from minimum to maximum.
This concept applies to the CO2 and humidity proportional control too.
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17
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
33
Press (Set) again to enter the new setting and move down to the next screen.
Temperature Parameters Screen
This Temperature Parameters screen is only displayed if relevant sensors are detected at the Sensors screen
(see Sensors Screen on page 30). This screen enables the temperature settings for Setpoint and Passband,
measured by an external sensor, to be adjusted.
Temperature
SetPoint 22C
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the temperature (in degrees C)
for the Temperature SetPoint (10 to 35). This is the target room temperature.
Press (Set) again to enter the new setting and move down to the next screen.
Temperature
Passband 10C
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the temperature (in degrees C)
for the Temperature Passband (02 to 50). This is the range of temperatures that proportionally control the motor
speed from minimum to maximum.
Press (Set) again to enter the new setting and move down to the next screen.
CO2 Parameters Screen
This CO2 Parameters screen is only displayed if relevant sensors are detected at the Sensors screen (see
Sensors Screen on page 30). This screen enables the carbon dioxide settings for Setpoint and Passband to be
adjusted.
CO2
SetPoint 1000ppm
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the CO2 SetPoint (200 to
2000ppm).This is the target CO2 level.
Press (Set) again to enter the new settings and move down to the next screen.
CO2
Passband 1000ppm
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the CO2 Passband (200 to
2000ppm). This is the range of CO2 that proportionally control the motor speed from minimum to maximum.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Press (Set) again to enter the new setting and move down to the next screen.
Humidity Parameters Screen
This Humidity Parameters screen is only displayed if relevant sensors are detected at the Sensors screen
(Sensors Screen on page 30). This screen enables the humidity settings for Setpoint and Passband to be
adjusted.
Humidity
SetPoint 70%
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the Humidity SetPoint (25 to
90%).This is the target Humidity level.
Press (Set) again to enter the new settings and move down to the next screen.
Humidity
Passband 40%
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the Humidity Passband (2 to
100%). This is the range of Humidity that proportionally control the motor speed from minimum to maximum.
Press (Set) again to enter the new setting and move down to the next screen.
Constant Pressure Parameters Screen
This Constant Pressure Parameters screen is only displayed if relevant sensors are detected at the Sensors
screen (Sensors Screen on page 30). This screen enables the Constant Pressure settings for Setpoint and PID
Sensitivity to be adjusted.
CP
SetPoint 150Pa
Press (Set) and then use the (Up) and (Down) push-buttons to adjust the Constant Pressure
SetPoint (50 to 490Pa).This is the target pressure.
Press (Set) again to enter the new settings and move down to the next screen.
CP
PID Medium
Press (Set) and then use the (Up) and (Down) push-buttons to select the Constant Pressure PID
Sensitivity (Low, Medium or High). This is the range of pressure that proportionally control the motor speed
from minimum to maximum.
Press (Set) again to enter the new setting and move down to the next screen.
Comfort Settings Screen
The Comfort Settings screen enables comfort, bypass and overheat settings to be adjusted.
Comfort – cools the room by either varying the fan speed, or by opening the bypass when a threshold
temperature is reached.
Bypass – cools the room by opening the bypass when a threshold temperature is reached.
Overheat – cools the room when triggered by a high extract air (T3) at 3 pm, then runs at night when
intake air (T1) is cool. This requires switch input 4 (central heating) to be connected.
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22
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Commissioning
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
35
Comfort Settings - Comfort
Note
Comfort control is not available with ITC mode or Proportional with external temperature sensor
because they both deal with a warm room by running the fans faster.
Comfort Settings
.....
Press (Set) and then use the (Up) and (Down) push-buttons to select the Comfort Enable/Disable
option.
Comfort Settings
Comfort Enable
If Comfort Enable is selected, pressing (Set) again enables you to select a temperature (in degrees C) for
the comfort setting (20C to 29C). This is the target room temperature. The fans speed up above this set
temperature to increase the airflow.
Comfort Settings
Comfort 24C
Press (Set) again to enter the new setting and move down to the next screen.
Comfort Settings - Bypass
Models fitted with a Summer Bypass will provide energy-free heating and energy-free cooling when the house
temperature and ambient temperature allows.
If the room is warmer than the set (shown as "indoor") temperature (i.e. you need the room to be cooler) and
the outdoor air is cooler than the actual room temperature (i.e. the outdoor air could cool your room) then the
bypass will open and the unit will supply cooler air to your room.
If the room is cooler than the set ("indoor") temperature (i.e. you need the room heating) and the outdoor air is
warmer than the actual room temperature (i.e. the outdoor air could heat your room) then the bypass will open
and the unit will supply warmer air to your room.
Note
The above only applies whilst the outdoor air temperature is above 14 C (adjustable) in order to
prevent cold draughts.
The set ("
indoor
") temperature should be set 2 or 3 degrees higher than the central heating thermostat and 2 or 3
degrees below any air conditioning thermostat, if fitted. This will prevent any clash between the separate systems.
Use the (Up) and (Down) push-buttons to select the Bypass Enable/Disable option. This enables or
disables the Summer Bypass.
Comfort Settings
Bypass Enable
If
Bypass Enable
is selected, pressing (Set) again enables you to select a temperature (in degrees C) to
initiate the bypass (
10 to 30
) using the Up and
Down
push-buttons. This is the target room (internal) temperature.
Comfort Settings
Bypass Int 21C
Commissioning
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Pressing (Set) again enables you to select a temperature (in degrees C) to initiate the bypass (5 to 20) using
the Up and Down push-buttons. This is the external ambient temperature.
Comfort Settings
Bypass Ext 15C
Press (Set) again to enter the new settings and move down to the next screen.
Comfort Settings - Overheat
Use the (Up) and (Down) push-buttons to select the Overheat Enable/Disable option.
This allows an overnight purge to happen when a trigger point is reached at 3 pm and the ambient air is cooler
than the room air at the following 2 am. The unit brings in the cool air via the summer bypass until the room
temperature gets down to the target temperature.
Notes
1 The unit must be in a standby mode from the use of the time clock, BMS or switched input.
2 Switched input 4 (central heating) must be connected.
Comfort Settings
Overheat Enable
If Overheat Enable is selected, pressing (Set) again enables you to select a temperature (in degrees C) for
the summer overheat trigger temperature (21C to 40C) using the Up and Down push-buttons.
Comfort Settings
Overheat > 30C
Press (Set) again to enter the new settings and move down to the next screen. Use the (Up) and
(Down) push-buttons to select a target temperature (in degrees C) for the summer overheat stop temperature
(10C to 20C).
Comfort Settings
Overheat < 20C
Press (Set) again to enter the new settings and move down to the next screen.
Settings Code Screen
The Settings Code screen displays a six-digit code (000300) that represents the commissioning parameters that
have been set (see
The Settings Code on page 38). It also displays the Main Controller PCB software version number and the
Commissioning Interface software version number.
Settings Code
000300 V***/***
This is the last of the Commissioning screens. After 2 minutes of inactivity you will be automatically returned to
the Operating and Monitoring Screens (Running Display). Alternatively, navigate to the Language Screen using
either the (Up) or (Down) push-buttons and then press and hold the (Enter) push-button for 5
seconds.
Press and hold the (Enter) push-button to exit the commissioning screens and show Sentinel HR Test.
Press the
(Down) and (Enter) push-button simultaneously to display the Code Set screen.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
37
Set Code Screen
The Set Code screen is accessible when either:
the (Down) and (Enter) push-button simultaneously from the Settings Code screen, or
the (Down) and (Enter) push-button simultaneously from the Sentinel HR Test screen.
This screen enables the settings code to be changed on a replacement Main Controller PCB, as an alternative
to re-entering the settings using the commissioning screens to re-establish the unit configuration, or where
multiple units need to be commissioned at the same site with the same settings.
Set Code?
000300
Press (Set) and then use the (Up) and (Down) push-buttons to enter each of the 6 appropriate code
numbers (see
The Settings Code on page 38).
Press (Set) again to enter the new setting and to go to the Factory Test to calibrate the bypass drive.
The Settings Code
The settings code is displayed on the last commissioning screen (see Settings Code Screen on page 36). The
code corresponds to the settings selected on the commissioning screens, as shown below.
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Figure 22: Settings Code
Writing Down the Settings Code
On completion of commissioning, write down the settings code, corresponding to the chosen settings, on the
Installer Notice label provided inside the Control Panel and on the Technical Specification on page 6 of this
manual.
Commissioning
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
39
Figure 23: Installer Notice Label
The commissioning settings are stored in non-volatile memory on the Main Controller PCB and will be
automatically restored after a shutdown or power outage. The internal clock is maintained during a power failure
by a battery on the Main Controller PCB. If this system fails for any reason, the configuration code written on the
back of the door may be used to reinstate the settings.
Using the settings code is a quick way to restore the settings of a unit. It is also a quick way to configure multiple
units in a large installation if they are all required to operate in the same way.
Note:
The settings code WILL NOT restore time settings or comfort settings, which will be set to the
default settings. These must , therefore, be set manually on each unit using the commissioning
screens provided by the Commissioning Interface.
Default Settings
The following default commissioning settings are present when the unit is switched on.
Table 4: Default Settings
Parameters Settings
Set Clock
-
Dampers
Not fitted
Heater Run On
Disabled
Flow Imbalance
Enabled
Frost Protection
Auto, if heaters fitted
Filter
91 days
Sensors
-
Operating Mode
-
On Off Control
Always On (if Internal Clock selected default on off = 6:30 – 22:30)
Minimum Speed
20%
Maximum Speed
80%
Flow Balance
Int 100% , Ext 100%
ITC
-
Comfort Settings
Comfort Enable (24C), Bypass Enable (21C), Ext Temperature (15C), Overheat Enable
(summer overheat trigger 30C and summer overheat stop 20C)
Settings Code
-
Restoring Factory Settings
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Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Restoring Factory Settings
Restore Settings Screens
Switch on the unit while holding the (Set) push-button (for approximately 12 seconds) to display the Restore
Settings screens (default values shown where applicable).
Figure 24: Commissioning Interface - Restore Screens
Restore Settings Screen
To restore settings to the factory defaults, switch on the unit while holding the (Set) push-button until the
Restore Settings screen is displayed (approximately 12 seconds).
To leave the Restore Settings screens at any point with settings unchanged, press the (Enter) push-button.
This Restore Settings screen enables you to enable the restore settings mode.
26
See page 42
See page 42
Restoring Factory Settings
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
41
Restore Settings
No
Press (Set) and then use the (Up) and (Down) push-buttons to select/change the option (No or Yes).
Press (Set) again to enter the new setting and move down to the next screen.
Select Restore Screen
This Select Restore screen enables you to select the type of restore operation to be performed.
Select Restore
None
Press (Set) and then use the (Up) and (Down) push-buttons to select from the available options
(None, Parameters, Total or Factory Test).
Press (Set) again to enter the new setting and move down to the next screen.
Parameters Screen
This Parameters screen enables you to restore key parameters to their default values. This option restores
minimum and maximum speeds, flow balance, internal clock on/off times, all sensor set points and pass bands,
comfort, bypass and overheat to their default values.
Parameters
No
Press (Set) and then use the (Up) and (Down) push-buttons to select/change the option (No or Yes).
Press (Set) again to enter the new setting and move down to the next screen.
Total Screen
This Total screen enables you to restore additional parameters to their default values and sensors to their
factory test state. This option restores dampers, heater run-on, on/off mode, operating mode to
‘uncommissioned’ and flow imbalance to their default values.
Total
No
Press (Set) and then use the (Up) and (Down) push-buttons to select/change the option (No or Yes).
Press (Set) again to enter the new setting and move down to the next screen.
Factory Test Screen
THIS IS FOR VENT-AXIA TRAINED PERSONNEL ONLY
This Factory Test screen enables you to repeat a factory test on a previously tested Main Controller Board by
entering the appropriate code number.
Factory Test
Code? 123
Press (Set) and then use the (Up) and (Down) push-buttons to enter the code.
Press
(Set) again to enter the new setting and proceed with the Factory Test.
30
29
28
27
Operation and Monitoring
42
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Operation and Monitoring
About Operation and Monitoring
When the Sentinel Totus 2 unit has been installed and commissioned (see the previous sections) it should
require no further intervention in order to operate, unless external switches are used to control on/off/boost, etc,
or BMS control requires user action.
When the commissioning screens are exited, the Commissioning Interface display returns to the status
monitoring screens, as described below (see also Figure 20: Commissioning Interface on page 24).
Status Monitoring Screens
The Status Monitoring (Running Display) screens display status and key operational conditions (temperatures or
pressures, etc.) according to how the unit has been configured. These screens are displayed in a loop during
normal operation of the unit, either after displaying the start-up screens, or when commissioning has been
completed. After a few seconds the display backlight is turned off in order to minimise power consumption. The
Up and Down push-buttons can be used to stop the loop sequence in order to display individual screens for a
longer period with the backlight turned on, if required.
Figure 25: Commissioning Interface – Operation and Monitoring Screens
V***
Operation and Monitoring
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
43
Day/Time/Temp/On Off Mode Screen
This screen displays the day, time, temperature and on/off mode information.
Tue 07:11 08 23C
Switch Enable
The top line displays day, time and temperature information:
Day (Tue) which could be Sun, Mon, Tue, Wed, Thu, Fri, or Sat.
Time (07:11) in hours: minutes (24-hour clock).
Intake Temperature (08) measured by thermistor T1, see Figure 1: Sentinel on page 4 & 5.
Extract Temperature (23C) measured by thermistor T3, see Figure 1: Sentinel on page 4 & 5.
To adjust the clock date and time, press (Set) when the Day/Time is displayed. Adjustment for Daylight
Saving is automatic.
The bottom line displays on/off mode control information:
Always On
Switch Enable
BMS Enable
Internal Clock (Next On/Next Off)
When the Day/Time screen is displayed and running Internal Clock mode, press (Enter) to advance to the
Next On or Next Off time.
Mode/Speed/Status Screen
This screen displays the operating mode and speed (top line) and status information (bottom line).
MM Mode 030%
Sentinel HR Off
The top line displays mode and motor speed information (see Operating Mode Screen on page 30), depending
on which operating mode is configured.
Min/Max Mode
The following display is shown, when min/max mode is configured.
MM Mode 030%
Sentinel HR Off
The top line shows MM Mode, Speed %.
The bottom line displays status information, see Status Display on page 44.
BMS Mode
The following display is shown, when BMS mode is configured.
BMS Mode 030%
Sentinel HR Off
The top line shows either:
BMS Mode, Speed %
2
1
Operation and Monitoring
44
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
BMS Signal %
The bottom line displays status information, see Status Display.
Proportional Mode
The following display is shown, when proportional mode is configured.
PR Mode 030%
Sentinel HR Off
The top line shows:
PR Mode, Speed % and alternating with the sensor(s) connected
Remote Local Signal %
CO2 Internal Signal ppm
Temperature Signal C
CO2 Ext Signal ppm
Humidity Signal %
The bottom line displays status information, see Status Display .
Constant Pressure Mode
The following display is shown, when constant pressure mode is configured.
CP Mode 030%
Sentinel HR Off
The top line shows either:
CP Mode, Speed %
Set Point, Measured Pressure
The bottom line displays status information, see Status Display .
ITC Mode
The following display is shown, when ITC mode is configured.
ITC Mode 030%
Sentinel HR Off
The top line shows either:
ITC Mode, Speed %
Set Point, Speed %
The bottom line displays status information, see Status Display .
Status Display
The bottom line of the Mode/Speed/Status screen always displays unit status. Any of the following messages
may be displayed:
Sentinel HR Off
Sentinel HR On
Dampers Opening
Dampers Closing
Operation and Monitoring
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
45
Bypass Closing
Heater Run On
Bypass Open + code
0 closing after an open event has finished
1 power on test
2 comfort control
3 summer bypass
4 overheat
5 defrost
Bypass Fail
Defrost Mode + code
1 – 10 imbalance mode speed
50 / 51 heater 1 / heater 2
60 fans at minimum
61 and bypass open
62 3-hour timeout and stop
Untested
Uncommissioned
Replace Filter
Heating Fail + countdown (If the temperature from the room is less than 5C the heating fail is activated
the unit stops for 1 Hour and then re samples the temperature in the room)
10 to 0, fans running
60 to 0, fans stopped
Overheat Active + code
0 cancelling
1 triggered @ 3pm
2 running (from 2am)
3 sampling (from 2am)
4 going off
Comfort Control
Heat Balance On
Starting….
Efficiency Screen
The Efficiency screen displays the following information.
Efficiency 80%
Run Hours 00025
The top line indicates the efficiency of the heat recovery unit. Initially it displays 80% at switch on for the first ten
minutes to allow the unit time to stabilise, and is updated every 5 seconds to reflect the current heat recovery
efficiency of the unit. The screen displays “---“ when off or in standby.
The bottom line shows either:
Run Hours – indicates the number of hours that the unit has been operational.
Filter Days – indicates the number of days left before the filters must be changed.
3
Maintenance
46
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Maintenance
Caring for Your Unit
Heat recovery units, by their very nature, require regular maintenance. The Sentinel Totus 2 D-ERV has been
designed to facilitate access to enable maintenance to be carried out easily.
In addition to the maintenance tasks outlined below, periodic sterilisation of the unit in line with current medical
advice on legionella risks is required. This is contained in a separate leaflet available from Vent-Axia.
3-Monthly Maintenance
The following 3-monthly maintenance is recommended:
Table 5: 3-Monthly Maintenance
Item Action
General Inspect the unit internally for build-up of dust, dirt and condensation. Clean as required.
Filters
The Status LED on the Commissioning Interface, and on the cable inlet panel, will flash red
and green alternately when the filters require replacement. This alarm is triggered by the
number of days that the unit has been running.
Replace the filters. Note the filters are NOT washable. Observe the warning label provided
on the filters regarding face mask protection and disposal of the used item.
When the filter has been replaced, reset the Status LED by following the instructions on the
Commissioning Interface Filter screen. This will reset the timer back to selected days.
12-Monthly Maintenance
The following 12-monthly maintenance is recommended:
Table 6: 5 12-Monthly Maintenance
Item Action
Heat Exchanger Cell
Inspect the cell for build-up of dust and dirt. Blow with an airline to clean it. The cell is not
designed to be removed for cleaning.
Motors
Inspect the motors for build-up of dust and dirt on the impeller blades, which could cause
imbalance and increased noise levels. Vacuum or wipe clean if necessary.
Condensate Tray Wipe any wet surfaces with a dilute cleaning solution, such as Milton.
Condensate Drain Check the condensate drain tube is secure and clear. Clean if necessary.
5-Yearly Maintenance
The following 5-yearly maintenance is recommended:
Table 7: 5 Yearly Maintenance
Item Action
Battery
Replace the battery on the Main Controller PCB (type BR1225 3 V). Ensure positive (+) side
is uppermost (i.e. visible) when replaced.
Adjust the clock to agree with the local time. (see Day/Time/Temp/On Off Mode Screen on
page 43).
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
47
Removal/Replacement of Parts (Mini & Midi)
WARNING
THIS EQUIPMENT PRESENTS ELECTRICAL, MECHANICAL AND NOISE HAZARDS. FAILURE TO USE SAFE
WORKING PRACTICES AND OBSERVE THE RELEVANT REGULATIONS MAY RESULT IN DEATH OR
SERIOUS INJURY. REMOVAL AND REPLACEMENT OF PARTS SHOULD ONLY BE PERFORMED BY
QUALIFIED AND VENT-AXIA APPROVED SERVICE ENGINEERS.
The following parts can be replaced in the event of failure or maintenance:
Motors
Water pump
Filters
See Appendix B: Options and Accessories on page 63 for part numbers.
The procedure for replacing these parts is dependent on whether access to the unit can be gained from above
(if roof-mounted) or from below (if ceiling-mounted).
Cover Removal/Replacement
The Top and Bottom Covers are arranged in two halves, designed to be removed separately.
Totus 2 Midi & Mini top cover Totus 2 Midi bottom cover
Totus 2 Mini bottom cover
TOP
COVER
1
TOP
COVER
2 BOTTOM
COVER
1
BOTTOM
COVER
2
BOTTOM
COVER
3
Removal/Replacement of Parts (Mini & Midi)
48
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Removal
1. Turn the unit off.
2. Release the thumb-catches securing the cover to the chassis. Catches to secure each cover are positioned at
the corners of the unit and half-way along the short sides. This will release the air-tight seal
3. In turn, grab hold of the two handles on each cover. Lift up the outer edge of the each cover slightly, and
pull it out from underneath the retaining bar in the middle of the unit, to reveal the internal parts of the unit.
Thumb-catches secure the top
covers to the unit chassis. The
bottom covers are secured in the
same way.
Removal of Top
Covers when Roof-
Mounted
Lift and slide the covers
out in the direction of
the arrows.
Removal of Bottom
Covers when Ceiling-
Mounted
Open Thumb-catches
of Bottom covers to the
unit chassis
Remove Bottom Cover2
Thumb-catches secure the top &
Bottom covers to the unit chassis.
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
49
Replacement
1. Ensure that each cover is slotted firmly back into its retaining slot in the middle of the unit.
2. Re-attach the thumb-catches at the corners of the unit to secure the cover to the chassis. Visually check
the integrity of the air-tight seal around the lid.
Note
The unit will not operate correctly unless the covers are correctly fitted to the unit.
Filter Removal/Replacement (Roof-Mounted)
Filters are fitted to both the internal and external inlets to prevent dust being drawn into the unit. The unit
records when new (clean) filters are fitted to the unit and a timer is used to count down the number of days to
replacement (see Filter Screen on page 29). Filters must be removed / replaced when the counter reaches 000.
Filter
Days To Go 000
Removal
1. Turn the unit off.
2. Remove both of the top covers (see Cover Removal/Replacement on page 47).
3. Remove each filter by holding it firmly along its edge and pulling it upward out of the filter slot (the filter is a
push-fit item and not fastened in place).
Replacement
1. Ensure that the new (clean) filters are firmly pushed back into their slots.
2. Replace the top covers (see Cover Removal/Replacement on page 47).
3. If filter replacement is as a result of the counter reaching 000, as indicated by the Commissioning
Interface, use the (Up) and (Down) push-buttons to select Yes and reset the timer (see Filter
Screen on page 29).
Filter Removal/Replacement (Ceiling-Mounted)
Removal
1. Turn the unit off.
2. Remove Panel 3 and the Filter Panel
Filters at either end of the unit may
be removed / replaced by sliding
them out / in the filter slot.
Removal/Replacement of Parts (Mini & Midi)
50
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
3. Remove each filter by holding it firmly along its edge and pulling it downward out of the filter slot (the filter
is a push-fit item and not fastened in place).
Replacement
1. Ensure that the new (clean) filters are firmly pushed back into their slots.
2. Replace the access panels with the four screws.
3. If filter replacement is as a result of the counter reaching 000, as indicated by the Commissioning
Interface, use the (Up) and (Down) push-buttons to select Yes and reset the timer (see Filter
Screen on page 29).
Motor Removal/Replacement (Roof-Mounted)
Two DC motors are used to draw-in and extract air from the unit. Both are positioned at the external ambient-air
side of the unit and can be accessed by removing a single top cover, when roof mounted.
Removal
1. Turn the Unit off.
2. Remove the top cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Disconnect the motor leads/Molex connector.
4. Unscrew, and retain, the four screws securing each motor to its mounting plate on the chassis.
Remove filters
Panel 3 - Remove split pins and release Thumb catches
Filter Panel – Remove 2 fixing screws.
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
51
5. Withdraw the motor(s) upward from the unit.
6. Unscrew, and retain, the four screws securing each motor to its mounting plate.
Replacement
1. Place each new motor inside the unit back onto its mounting plate.
2. Secure the motor assemblies to their mounting plates using the four screws.
3. Reconnect the motor leads/Molex connector.
4. Switch on the unit and check that the air-flow (direction) is correct.
5. Replace the top cover (see Cover Removal/Replacement on page 47).
Motor Removal/Replacement (Ceiling-Mounted)
Two DC motors are used to draw-in and extract air from the unit. Both are positioned at the external ambient-air
side of the unit and can be accessed by removing a single bottom cover, when ceiling mounted.
Removal
1. Turn the Unit off.
2. Remove the bottom cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Disconnect the motor leads/Molex connector.
4. Unscrew, and retain, the four screws securing each motor mounting plate to the chassis.
5. Withdraw each motor and its mounting plate downward from the unit.
Two motors are used to pull and
push air through the unit.
Removal/Replacement of Parts (Mini & Midi)
52
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
6. Unscrew, and retain, the four screws securing each motor to its mounting plate.
Replacement
1. Secure each motor to its mounting plate using fours screws.
2. Place the new motor and its mounting plate back inside the unit into position.
3. Secure the motor assemblies mounting plates to the chassis using the four screws.
4. Reconnect the motor leads/Molex connector.
5. Switch on the unit and check that the air-flow (direction) is correct.
6. Replace the bottom cover (see Cover Removal/Replacement on page 47).
Float Switch Removal/Replacement (Roof-Mounted)
A Float Switch is used to trigger a water pump when there is a build up of condensation within the unit. It is
located immediately underneath a square access panel and accessed through the top of the unit, when roofmounted.
Removal
1. Turn the unit off.
2. Remove the top cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Remove the square access panel by unscrewing the four retaining screws.
Motors may be removed from
underneath when ceiling mounted.
Motor and mounting plates.
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
53
4. Disconnect the float switch leads/Molex connector.
5. Withdraw the float switch upward from the unit.
Replacement
1. Place the float switch in position and secure it to the chassis with the retained screws.
2. Reconnect the float switch leads/Molex connector.
3. Replace the square access panel using the four screws.
4. Switch on the unit and check that the float switch operation is correct.
5. Replace the top cover (see Cover Removal/Replacement on page 47).
Float Switch Removal/Replacement (Ceiling-Mounted)
The Float Switch triggers a water pump when there is a build up of condensation within the unit. It is positioned
at the external ambient-air side of the unit and can be accessed by removing a single bottom cover, when
ceiling-mounted.
Removal
1. Turn the unit off.
2. Remove the bottom cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Disconnect the float switch leads / Molex connector.
4. Unscrew, and retain, the 2 wing-bolts securing the float switch to the chassis plate using your finger and
thumb.
5. Withdraw the float switch downward from the unit.
When accessed from the top of the
unit, the float switch is located
beneath a square access panel.
When accessed from underneath the
unit, the float switch is screwed to the
square access panel.
Removal/Replacement of Parts (Mini & Midi)
54
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
6. Disassemble the Float Switch from the Float Switch Arm Assembly.
Replacement
1. Re-assemble the Float Switch Arm Assembly.
2. Place the float switch in position and secure it to the chassis with the 2 retained wing-bolts.
3. Reconnect the float switch leads/Molex connector.
4. Switch on the unit and check that the float switch operation is correct.
5. Replace the bottom cover (see Cover Removal/Replacement on page 47).
Condensate Pump Removal/Replacement (Roof-Mounted)
The condensate pump extracts water from the condensate tray by pumping it up a tube that leads outside the
unit. It can be accessed by removing a single top cover when roof-mounted.
Removal
1. Turn the unit off.
2. Remove the top cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Disconnect the condensate pump leads/Molex connector and disconnect the inlet and outlet water pipes.
4. Unscrew, and retain, the 2 screws of the U-shaped bracket securing the condensate pump to the chassis.
When accessed from underneath the
unit, the float switch is screwed to the
square access panel.
Condensate pump access from the
top of the unit (Roof-Mounted).
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
55
5. Withdraw the condensate pump upward from the unit.
Replacement
1. Place the condensate pump in position and secure it to the chassis with the U-shaped bracket and 2
retained screws.
2. Reconnect the condensate pump leads/Molex connector and the inlet/outlet water pipes.
3. Switch on the unit and check that the float switch operation is correct.
4. Replace the top cover (see Cover Removal/Replacement on page 47).
Condensate Pump Removal / Replacement (Ceiling-Mounted)
The condensate pump extracts water from the condensate tray by pumping it up a tube that leads outside the
unit. It can be accessed by removing a single bottom cover when ceiling-mounted.
Removal
1. Turn the unit off.
2. Remove the bottom cover at the external ambient-air side of the unit (see Cover Removal/Replacement on
page 47).
3. Disconnect the condensate pump leads/Molex connector and the inlet/outlet water pipes.
4. Unscrew, and retain, the 2 screws of the U-shaped bracket securing the condensate pump to the chassis.
5. Withdraw the condensate pump downward from the unit.
Replacement
1. Place the condensate pump in position and secure it to the chassis with the U-shaped bracket and 2
retained screws.
2. Reconnect the condensate pump leads/Molex connector and the inlet/outlet water pipes.
3. Switch on the unit and check that the water pump operation is correct.
4. Replace the bottom cover (see Cover Removal/Replacement on page 47).
Condensate pump is secured to the
chassis by a bracket fixed by 2
screws.
Condensate pump access from the
bottom of the unit (Ceiling –
Mounted).
Removal/Replacement of Parts (Mini & Midi)
56
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Totus II Maxi Filter Removal / Replacement
1. Remove panels 3 and 4 as shown above.
2. Remove cell filters out of panels 3 and 4.
3. Replace cell filters and close panels 3 and 4.
4. For bypass filter follow instructions on commissioning screen when removing bypass flap through PCB.
5. Once bypass flap opens, pull the bypass filter to the outside by using the tie.
6. Place back the filter by bending and place in brackets.
7. Close panels.
Access to cell filter
Access to cell and
bypass filter
Removal/Replacement of Parts (Mini & Midi)
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
57
List of Spares
The table below lists the spares for the Totus 2 Mini, Midi & Maxi:
*F6 Filter conversion kit is required if F6 filters are to be fitted to the totus unit.
Description Part Number (Mini) Part Number (Midi) Part Number (Maxi)
MAIN PCB ASSEMBLY SPARE 447250 447250 447250
MOTOR ASSEMBLY SPARE 445850 446643 444967
ROOM CONTROLLER SPARE 437141 437141 437141
POWER SUPPLY PCB SPARE 446645 446645 446645
FILTER PACK (2 PER PACK) G4 SPARE 445851 447251 442071
F6 FILTER CONVERSION KIT* 445852 446607 -
FILTER PACK (2 PER PACK) F6 SPARE 407882 447252 -
CONDENSATE PUMP SPARE 445038 445038 445038
HEAT RECOVERY CELL SPARE 445853 447254 -
THERMISTOR PACK (T1,T2,T3 & T4) SPARE 447255 447255 445042
ISOLATOR SWITCH SPARE 447256 447256 474468
NEON ASSEMBLY SPARE 445049 445049 445049
ACTUATOR KIT SPARE 447258 447258 443433
HEATER & BRACKET ASSY SPARE 445854
ASSY 1: 447253
ASSY 2: 447259
446028
CP CONVERSION KIT - - 445482
Pressure Transducer KIT 446848 446848 -
Turnbuckles (Pair) - - 445040
Bypass Filter - - 407752
Troubleshooting
58
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Troubleshooting
Diagnosing a Problem
In the event of a problem, always troubleshoot the unit according to:
Diagnostic code displayed on the Commissioning Interface.
Fault LED on the Commissioning Interface and cable entry panel.
Check fuses on the Main Controller PCB.
If no indications are displayed, then troubleshoot problem according to the fault symptom as described in the
following tables.
Diagnostic Codes
A diagnostic code screen is displayed on the Commissioning Interface in the event that a fault has occurred
which resulted in the unit operation being stopped and placed into standby.
SENTINEL HR
DIAGNOSTIC ---
The following diagnostic codes may be viewed on the Commissioning Interface.
Table 8: Diagnostic Codes
Problem Code Description
Thermistors 1-255
T1 T2 T3 T4
+1 +2 +4 +8 = Short Circuit
+16 +32 +64 +128 = Open Circuit
Thermistors are checked continuously and one or more has to be at fault for 60
seconds before triggering this diagnostic stop.
Pump float switch open 300
Pump float switch is checked continuously and has to be open (i.e. fault or
excess condensate) for 120 seconds before triggering this diagnostic stop. If
the unit is ‘Off’ then pump mains is turned on after 30 seconds to try to reduce
the water level.
Fan 1 extract relay open 310
Fan relays are checked when HR is ON, either relay has to be open for 60
seconds before triggering this diagnostic stop. This is a NC relay on board the
motor itself. It goes open when motor detect fault.
Fan 2 intake relay open 320
Fan relays are checked when HR is ON, either relay has to be open for 60
seconds before triggering this diagnostic stop. This is a NC relay on board the
motor itself. It goes open when motor detect fault.
24 V sensor supply fuse
blown
330
24 V sensor supply fuse is checked when the unit is switched on and has to be
open for 10 seconds before triggering this diagnostic stop.
Pressure sensor in CP mode 340
Pressure sensor is checked when HR is ON and in CP mode. The sensor
signal has to be below the CP preset threshold ( value from factory test ) whilst
the fan speed is greater than 50% for 60 seconds before triggering this
diagnostic stop.
Commissioning Interface but
no data from HR
360
A 360 code indicates power to the remote control but no data, a wiring fault or
failure on the heat recovery board.
Troubleshooting
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
59
Fault LED/Status Relay
A Status relay, provided by the Main Controller PCB, indicates a fault occurring on the unit. A flashing red or
red/green LED indicator on the Commissioning Interface, and on the unit cable entry panel, indicate this locally.
The status relay contacts enable remote status monitoring for the fault conditions, which may be connected to
an external indicator or BMS, etc. (see Appendix C: Main Controller PCB Terminals on page 64 for connector
details).
Table 9: Fault LED/Status LED Indications
Indication Possible Problem Action
Flashing Red Thermistor failure
Check sensor operation and replace as necessary,
Flashing Red
Condensate sump is full and if
the unit is running
Check operation of the float switch and pump.
Replace if necessary
Check that the pipe carrying the water to the
condensate drain is not split, disconnected or kinked.
Replace if necessary.
Flashing Red
Fan failure Check fan operation and replace as necessary,
Flashing Red
24 V sensor supply is shorted or
fuse failure
Check sensor operation and replace as necessary,
Flashing Red Pressure sensor failure
Check sensor operation and replace as necessary,
Flashing Red
Bypass has not reached its
intended position
Check whether bypass is motion has stuck or has
failed and replace as necessary.
Flashing Red
Commissioning Interface is
disconnected or has a fault
Check the connections and cable running between the
Main Controller PCB terminals to the Commissioning
Interface terminals. Replace/rewire as necessary.
Flashing Red/Green
Filter hours have been exceeded Replace the filters and reset the Filters commissioning
screen (see Filter Screen on page 29).
Flashing Red
Heating Failure condition Check heater operation and replace as necessary,
Flashing Red
Shutdown by Defrost Bypass
mode
Check bypass operation and replace as necessary,
Power Supply Troubleshooting
Troubleshoot according to the fault symptoms. If the fault cannot be rectified, contact your local dealer or sales
office for a service engineer.
Table 10: Power Supply Troubleshooting
Symptom Possible Problem Action
No Power Supply (unit dead) External Power Supply Failure
Check external power source is available and switched
on.
Distribution Board Input
Fuse/RCD
Check fuse, or RCD if used, at distribution board.
Replace/reset if necessary.
Main Controller PCB Fuses
Check fuses on the Main Controller PCB and Power
Supply PCB, see Figure. Replace if necessary.
Other Contact Vent-Axia Technical Support.
No 24 V supply (at
sensors/switches)
Fuse F2
Check fuses on the Main Controller PCB and Power
Supply PCB, see Figure below.
Main Controller PCB Contact Vent-Axia Technical Support.
Internal Fuses
Internal fuse are provided on the Power Supply PCB and the Main Controller PCB for the protection the unit.
Troubleshooting
60
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Figure 26: Internal Fuses
The following table lists the fuse values and types.
Table 11: Internal Fuse Values and Types
PCB Label Fuse Type Purpose
Main Controller PCB FS1 Ceramic 10 A anti-surge Motors, pump and PSU.
FS2 Ceramic 10 A anti-surge Heater 1.
FS3 Ceramic 10 A anti-surge Heater 2.
FS4 Polyfuse 600 mA auto-resetting Switches, sensors and dampers.
Power Supply PCB F1 Glass ceramic 500 mA anti-surge Input supply.
F2 Glass 1.25 A quick-blow Main 24 V dc out.
Airflow/Temperature Troubleshooting
Troubleshoot according to the fault symptoms. If the fault cannot be rectified, contact your local dealer or sales
office for a service engineer
Table 12: Airflow/Temperature Troubleshooting
Symptom Possible Problem Action
No airflow or Maximum
airflow
Settings
Check the Commissioning Interface Status LED and
display screens for alarm indications/messages.
Check commissioning settings are correct – compare
code with that written on the Installer Notice label.
Re-instate settings, if necessary.
Battery FS4 FS1 FS3 FS2 F1 F2
Troubleshooting
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
61
Symptom Possible Problem Action
Switches/Sensors/Dampers Check operation of switches, sensors and dampers.
Check the unit responds to switch and sensor signals.
Ducting
Check that ducting has not become loose or
disengaged at any point along the airflow.
Unit Check airflow entering and leaving the ventilation unit.
Check internal fuses. Replace as necessary.
Check operation of motors. Replace if necessary.
Restore settings.
Summer Bypass Operating Summer Bypass jammed Connect 9V battery to terminal 22 & 23.
Condensate Troubleshooting
Troubleshoot according to the fault symptoms. If the fault cannot be rectified, contact your local dealer or sales
office for a service engineer
Table 13: Condensate Troubleshooting
Symptom Possible Problem Action
Condensation water not
being pumped out
Trigger switch
Check the operation of the float switch at the corner of
the condensate tray. Replace if necessary.
Pump
Check the operation of the pump. Replace if
necessary.
Pipe
If the switch and pump are both operational, check that
the pipe carrying the water to the condensate drain is
not split, disconnected or kinked. Replace if
necessary.
External condensate pipe frozen
Fit Raychem FrostGuard frost protection cable for
pipes.
Other Contact Vent-Axia Technical Support.
Pump running continuously Pump
Check the operation of the float switch inputs. Replace
pump if necessary.
Trigger switch
Check the operation of the float switch. Replace if
necessary.
Appendix A: Glossary
62
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
Appendix A: Glossary
Terms and Abbreviations
The following technical terms and abbreviations are used in this manual.
Term/Abbreviation Description
AQS
Air Quality Sensor
BMS
Building Management System
CO2
Carbon Dioxide
CP
Constant Pressure
D-ERV
Demand Energy Recovery Ventilation
EC/DC
Electrically Commutated Direct Current motor
EEPROM
Electrically Erasable-Programmable Read-Only Memory
HRU
Heat Recovery Unit
LCD
Liquid Crystal Display
LED
Light Emitting Diode
Min/Max
Minimum (trickle)/Maximum (boost)
P-Band
Proportional Control Range
PC
Proportional Control
PCB
Printed Circuit Board
PID
Proportional Integral Derivative control
RCD
Residual Current Device
SBP
Summer Bypass
SELV
Separated Extra-Low Voltage. IEC 61140 defines a SELV system as "an electrical system in
which the voltage cannot exceed ELV under normal conditions, and under single-fault
conditions, including earth faults in other circuits".
T1
Temperature of the fresh ambient air entering the unit from outside
T2
Temperature of the fresh air entering the room (supply)
T3
Temperature of the stale air leaving the room (exhaust)
T4
Temperature of the stale air discharged to the outside ambient
TC
Comfort setting
PIR
Passive Infra-Red Sensor
VFC
Voltage-Free Contact
Appendix B: Options and Accessories
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63
Appendix B: Options and Accessories
Sentinel Totus
The following options and accessories are available for the Sentinel Totus.
No Item Control Type Part Number Description
Sensors and Switches
1.
Air Quality Sensor
(AQS)
Switch 432953
Measures VOC level (adjustable)
Adjustable run-on timer 1-25 min
2.
Passive Infra-red
Sensor (PIR)
Switch 433162
Person detection
Adjustable run-on timer 5-25 min
3. Humidity Switch Switch 432949
Adjustable humidity sensing level 65 – 90%
4.
Ambient Response
Humidistat
Switch 432945
Fixed humidity sensing at 72/75% RH
Incorporates night setback
5. Time switch Switch 563515
7/24 mechanical type
Maximum 6 cycles/day
6. Thermostat Switch 563502B
Adjustable 6-30°C
7.
Remote Speed
Control
Proportional 426332
Manual fan motor speed control (24 V dc)
8. Carbon Dioxide Proportional 433257
Control level settable up to 2000 ppm CO2
and 50°C
24 V dc
9.
Carbon Dioxide Duct
Probe
Proportional 433259
Control level settable up to 2000 ppm CO2
24 V dc
10.
Remote Fan Status
Indicator
Visual Display 433816
Indicates fan running condition OK. Will flag
fan failure.
Constant Pressure
11. Power Supply 24 V dc 433193
24 W maximum output
12. Damper Assembly
MIN-MAX
positioning
DVD100/MM to
DVD315/MM
Sizes 100 – 315 mm
24 V dc actuator
13. Damper Assembly
Proportional
0-10 V
DVD100/PCM to
DVD315/PC
Sizes 100 – 315 mm
24 V dc actuator
14. PIR Grille Kit
PIR/Humidity
controlled damper
434184
125 mm size ducting
12 V ac transformer supplied with kit
Mechanical humidity control included
Roof Mounting
15. Cowl (Midi) 403460
Weatherproof cowl
16. Cowl (Mini) 445832
Weatherproof cowl
Appendix C: Main Controller PCB Terminals
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66
Appendix C: Main Controller PCB Terminals
Terminals
The following table details the terminals on the Main Controller PCB.
Terminal No. Name Description
1-3 - Factory use only
4-6 CO2 Internal 0-10 V 24 V supply available to sensor, 0-10 V sensor input
7- 9 Proportional Temp 0-10 V 24 V supply available to sensor, 0-10 V sensor input
10-12 Proportional CO2 0-10 V 24 V supply available to sensor, 0-10 V sensor input
13-15 Proportional Humidity 0-10 V 24 V supply available to sensor, 0-10 V sensor input
16-18 Remote/Local 0-10 V 24 V supply available to sensor, 0-10 V sensor input
19-21 BMS Proportional 0-10 V 24 V supply available to sensor, 0-10 V sensor input
22-25 - Factory use only
26-28 Damper 1 Open – 24 V (on) when HR is on and dampers are opening
Close – 24 V (on) when HR is on and dampers are closing
29-31 Damper 2 Open – 24 V (on) when HR is on and dampers are opening
Close – 24 V (on) when HR is on and dampers are closing
32-50 - Factory use only
51-53 Air Conditioning Enable On when (HR time clock or switch enable or always on) is on
Off when HR is off
Off when running in Overheat mode
54-56 Heater Interlock Enable On when (HR time clock or switch enable or always on) is on
Off when HR is going off – fans run for run on time
Off when running in Overheat mode
57-59 Filter On when HR is on and filter time has elapsed
Off when HR is off
Off when HR is on and filter time has not elapsed
60-62 Status On when HR is on
Off for a fault condition. The Status LED flashes red when the relay is
off.
See Table 9: Fault LED/Status LED Indications on page 59
63-65 Switch 5 BMS Enable Closed = HR on , Open = HR off
66-68 Switch 4 Central Heating Closed = heating off (enables Overheat), Open = heating on
69-71 Switch 3 Min-Max 24 V Closed = max speed, Open = min speed
72-74 Switch 2 Min-Max 24 V Closed = max speed, Open = min speed
75-77 Switch 1 Enable On/Off Closed = HR on , Open = HR off
78-83 - Factory use only
84-87
Commissioning Interface
Connection
PCB terminals 1-4 connect to the Commissioning Interface terminals
1-4
65
Appendix C: Main Controller PCB Terminals
Sentinel Totus 2 D-ERV Installation, Operation and Maintenance
66
65
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SALES ENQUIRIES: Tel: 0844 8560591 Fax: 01293 534898
TECHNICAL SUPPORT Tel: 0844 8560595 Fax: 01293 455197
For details of the warranty and returns procedure please refer to www.vent-axia or write to Vent-Axia Ltd, Fleming Way, Crawley, RH10 9YX
445924 M © 2016 Vent-Axia Limited. All rights reserved. 0717
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