1. OdoTron Odor Control System shall be provided to reduce dramatically or eleminate odor released in exhaust air from kitchen exhaust hood.

2. System Deliverable: Due to limitations in quantifying odor reduction as there are no quantifiable units to measure odor, fair and unbiased judgement by Purchasor/User, Engineering Consultant, and Manufacturer shall be the criteria for performance of the system. An arbitiary unit ‘Odor Depletion Index’ ‘ODI’ shall be used for such fair judgement. ODI 1 represents 10 % and ODI 10 represents 100 % odor abetement. Odor abatement achieved shall be not less than ODI 8 or 80 % reduction. It is acknowledged ODI 10 or 100 % odor abatement may not be accomplished.

3. The Odor Removal Equipment shall comprise Ozone Generator Compartment, Fan Compartment, and Electrical and Instrumentation Compartment.

4. Ozone Generator Compartment shall comprise team of multi plate, double sided corona discharge plates operating at high voltage, to produce adequate quantity of ozone at medium concentration. The system shall not require any consumable, and maintenance shall be minimum. Feed air shall be plant room air. Use of annular tube type corona with air as feed gas is not permissible, so as to prevent deposition of nitrogen oxides on the corona surface. To minimize maintenance cost, labor and time, and operational consumable, use of oxygen feed system is not permissible.

5. The Fan Chamber shall comprise forward curved centrifugal fan sized to extract required flow of air from plant room, sustain flow across the ozone generating cells, and inject ozonized air into kitchen exhaust air stream. Static Pressure of the fan shall be adequate to overcome required pressure drop within the odor control equipment, and have external static pressure not less than 0.2” WG (50 Pa) to enable unrestricted entry of ozonized air into Kitchen Exhaust Air Stream, travel through Contact Chamber, and eject to atmosphere with reasonable velocity. The motor shall be Thermally Protected, winding insulation Class B, UL Recognized and CSA Listed.

6. Air Intake Grille with opposed blade volume control damper, filter track, and filter housed in filter frame, shall be provided for intake of plant room air into the fan compartment. The filter shall provide 80% arrestance in conformity to Section 7.4 of ARI Standard 850-93. The filter media shall confirm to UL Class 2 and tested to UL Std 900.

7. Stainless Steel Back Draft Damper to prevent reverse flow of kitchen exhaust air shall be provided at exit of ozonized air from generator compartment, complete with collar for field provided duct connection.

8. The Electrical Compartment shall house all electrical components, controls, monitors, and instruments. This shall be isolated totally from all other compartments. The Electrical Compartment shall comprise sufficient number of electrical induction type transformers to drive ozone geenrator cells.

a. The Transformer shall be electrical induction type. Solid-state voltage converter shall not be used. The Transformer shall be Cross Ferro Magnetic Type. Secondary windings shall not burn, cause fire, generate smoke, or elevate greater than 90ºF (32ºC), even if the high voltage secondary output is short-circuited for extended period of time, in full load conditions. Upon removal of the short circuit, the transformer shall revert to normal operation without any damage or loss of efficiency, or reduced insulation capacity, or blow out of fuse, or trip of circuit breaker.

i The transformer shall be fully encapsulated. The encapsulation is to ensure the transformer windings and core are fully impregnated with epoxy rated for use in electrical equipment. The epoxy shall penetrate into various layers of primary and secondary windings, and into the various sections of the core. This is to ensure electrical spark, if any, shall be contained and isolated within the specific spot of occurrence in the windings, and temperature elevation if any shall be contained and isolated within the specific spot of occurrence of the winding or in the layers of the core. The epoxy for encapsulation shall be fire rated to UL94V0. The electrical properties of the epoxy for this encapsulation shall be;

a Dielectric strength at 23ºC not less than 425 volt/mil
b Voltage receptivity at 23ºC not less than 2 x 1015 Ohm Cm

ii The encapsulation of the transformer shall be done in a one piece die cast metallic enclosure 18 G CRS. The top cover shall be riveted. The enclosure shall be filled with fire rated epoxy to UL 94V0. This shall ensure the transformer is completely fire rated and non flammable.

iii The metallic enclosure and encapsulation shall also render the transformer totally safe to operate even if there is settlement and deposition of moisture or water on the transformer.

iv Primary of Transformer shall be rated for input voltage varying from 0 to 110V, or 220V, 50/60 Hz.

v Transformer shall be tested to CSA or UL.

b. Passage of high voltage conductor from transformer secondary terminal, across the metallic enclosure, to Generator Enclosure, shall be through Liquid Tight Strain Relief Connector rated for cables. One connector shall be used for each cable. Connection shall be of ozone resistant material such as Polyamide. Neoprene seal shall be used to ensure total air tightness up to 70 psi (5 Bar) and to NEMA 6 P (IP 68). It shall be ROHS Compliant, UL and CSA Listed.

c. High voltage electrical wire from the transformer secondary terminal to Corona contact plates shall be single length cable without joints or connectors, rated for 25 KV, 250ºC, certified to be ozone and corona resistant, have high flexibility, and shall be silicone insulated. Wire diameter shall not be less than 18 AWG. The wire shall be rated to UL3257. These shall be stamped on the wire. This is essential and cannot be waived from safety standpoint, as this wire carries high voltage.

d. The Ozone Generator Compartment shall not have any trace of Kitchen Exhaust Air while it starts and operates. Necessary Electrical System Relay compliant to ROHS and UL shall be provided to ensure this.

e. Auto/Manual Change Over Switch.

f. Manual Regulator to modulate production of ozone 0 to 100 %.

g. Mushroom Top Emergency one push shut down switch mounted on the outer surface of the enclosure for instant shut down of the odor control unit, in the event of emergency.

h. Hour Meter UL Listed or Recognized, housed in NEMA4 enclosure, to enable timely maintenance.

i. Air Pressure Monometer rated to read air pressure in inches (mm) of water column, measured at discharge of ozonized air from the odor removal equipment.

j. DPST Main On/Off Switch, DPST Fan On/Off Switch, Indicating Lamps, circulating fan to cool the Electrical Compartment, and Terminal Block.

9. Contact Switch shall be provided on the door of Generator Compartment and Fan Compartment to ensure the unit automatically shuts down completely if the doors are opened during operation of the unit.

10. All parts and components shall be factory installed complete with electrical and control wiring. Ozone Generator Compartment and all ozone wetted parts shall be fabricated of Stainless Steel. Fan Compartment and Electrical Enclosure shall be fabricated of 18 G Powder Coated CRS. No field work shall be necessary except interconnect ducts, contact chamber, and electrical connection.

11. The equipment shall be installed on a 6” (150 mm) or higher foundation pad and grouted firmly to the foundation. Installation shall be in indoor ventilated plant room.

12. Based on contact time required to achieve effective removal of odor as called for in this specification, Manufacturer shall provide volume and design of contact chamber.

13. Contact Chamber, all interconnect ducts, electrical connection, and control cables to BAS/BMS shall be provided by others.

14. At client’s request, pre shipment inspection and testing of equipment shall be provided at the manufacturer’s facility. Besides normal tests, following tests are mandatory;

a. Transformer secondary output, under full voltage and load will be subject to short circuit continuously for minimum of 24 hours. The primary and secondary windings shall not burn nor elevate in temperature greater than 90ºF (32ºC).

b. Upon release of the short circuit, the transformer shall revert to normal operation without any change or modification or repair, or fuse blow out, or trip of circuit breaker.

c. Demonstrate safe and undamaged operation of the transformer at full secondary voltage and load, with transformer fully immersed in a pail of water.

d. At inspectors instructions, cut open a transformer through the windings and core to demonstrate the penetration of the encapsulation epoxy into various layers of primary and secondary windings, and into the core.

e. Demonstrate that high voltage wire is stamped with ratings of voltage to 25 KV, temperature to 250ºC, and UL rating 3257.

15. As optional item, if called for in the BOM, VOC Monitor shall be provided. This shall be shipped loose for field installation at outlet of treated exhaust air at exit from Contact Chamber. This shall display level of VOC as Low, Medium, High on indicating lights. This shall provide 0 to 10 VDC Analog Signal to Auto VOC Controller, and for interface to BAS/BMS. The sensing element in the Monitor shall be located within a stainless steel mesh to prevent corrosion and assure longtime operation. The monitor shall be housed in 18 G CRS Powder Coated Enclosure.

16. As optional item, if called for in the BOM, Auto VOC Controller shall be provided in the Electrical Enclosure. Based on Analog 0 – 10 VDC input signal from VOC Sensor/Monitor, it shall modulate output voltage to primary of transformer from 0 to 110 V (or 0 to 220 V), for automatic modulation of ozone generator in response to level of VOC at exit of air from Contact Chamber to environment. The Controller shall be listed to UL 916.

17. Ozone Monitor shall be provided. It shall be shipped loose for field installation at outlet of treated air at exit from contact chamber. The Monitor shall display concentration of ozone in PPB. It shall comprise Relay with one NO and NC potential free Dry Contact rated for 250V, 10 Amps AC/DC. The LCD shall also display Alarm Condition and activation of Relay. It shall provide 0-10 VDC Analog Signal for interface to BAS/BMS. In the event ozone concentration at exit of treated vent air reaches regulatory mandated maximum or user set concentration, it shall deactivate the ozone generator cells. Sensor shall be factory housed in 18 G CRS Powder Coated Enclosure.

18. The system shall be rated for operation on 220 V, 3 Ph , 60 Hz or 220 V, 1 Ph, 50 Hz. Operating Temperature and RH shall be 32ºF to 115ºF (0ºC to 46ºC) and RH 0 to 100 % Non Condensing.

19. All individual parts and components of the odor control system shall be UL Listed or Recognized.

20. The equipment shall be;
Odor Control System: Ruks OdoTron
VOC Monitor: CZ6-S
(if called for in BOM)
Auto VOC Controller: CZ6-C
(if called for in BOM)
Ozone Monitor: CZ12
Make Ruks Engineering Ltd or equivalent
Country of Manufacture: Canada