Technical documentation. ComfoAir XL The latest generation of ventilation units with heat recovery

Transcription

1 Technical documentation ComfoAir XL The latest generation of ventilation units with heat recovery Heating Cooling Ventilation Filtering

2 Service and recommendations The latest heat recovery range from Zehnder is called ComfoAir XL. This range provides a healthy and pleasant indoor climate especially for use in commercial buildings and apartment blocks. There are numerous options with regard to the range of versions, control system technology, options and accessories. You can also arrange your unit combinations yourself. We are pleased to help you achieve your optimal ventilation system. We would be delighted to support you: Detailed recommendations based on a special operating point/with price details Support in the project (draft and implementation) Instructions on ventilation systems Telephone/personal assistance eople in a perfect indoor climate: for a nicer living area, work area and living environment. We give you our word. Zehnder always around you. All rights reserved. Utmost care and attention has been taken to create this document; however, the publisher cannot be held liable for any damage arising from missing or incorrect representation of information in this document. In the case of dispute, the Dutch version of the text shall have priority. 2

3 Table of contents 1. General Important features assive house certification ComfoAir XL series and options Block diagram Set-up Air-tight housing Fans High-performance plate heat exchanger Siphon Bypass Filter Batteries Flaps Design Control unit Controller Supply Quick selection Coding Selection schematic Selection chart Dimensions and weight Indoor installation Exterior mounting Technical data Technical data ComfoAir XL Technical data ComfoAir XL Technical data ComfoAir XL Technical data ComfoAir XL Technical data ComfoAir XL Technical data ComfoAir XL Accessories

4 1. General The ComfoAir XL series is a new generation of heat recovery units, which is suitable for use in commercial buildings and/or in apartment buildings. The ComfoAir XL series covers 6 different capacities from 800 to 6000 m³/h. 1.1 Important features Heat recovery of approx. 90 % Capacity up to 6000 m³/h Equipped with 100 % bypass assive house certification Renewed controller (ModBus communication) Constant volume and pressure control possible Unique, air-tight housing Renewed filter concept Filter monitoring with pressure sensors Easily accessible connection CB Unit easy to configure at specific operating point Diaphragm siphon installed as standard 1.2 assive house certification The ComfoAir XL units were designed in cooperation with the assive House Institute (HI) and in accordance with its directives. The units have passive house certification. This means that they satisfy the stringent requirements applied by the assive House Institute, whereby this series achieves greater energy savings (25 %) than the previous generation. The specific SF value (specific fan output) is less than 0.34 W/(m³/h). 1.3 ComfoAir XL series and options The ComfoAir XL series is available in a variety of versions and with numerous options. The focus was placed on the smallest possible dimensions during development of the units. Versions: ComfoAir XL 800 ComfoAir XL 1500 ComfoAir XL 2200 ComfoAir XL 3300 ComfoAir XL 4400 ComfoAir XL 6000 Air direction: Left (L) Right (R) Air direction for left-side version The intake opening for the outside air is located at the top right and the outlet opening for the used air is located at the top left. The extract air is located at the bottom right and the air supply at the bottom left. EHA 1 SU 2 Air direction for right-side version The intake opening for the outside air is located at the top left and the outlet opening for the used air is located at the top right. The extract air is located at the bottom left and the air supply at the bottom right. ODA 3 ETA 4 Filter: Cellular filter F7/G4 (F) Bag filter F7/G4 (BF) Options: Bypass: - Bypass open/closed (B) - Bypass modulating (BM) re-heater (RH) ost-heater (OH) Cooler (CL) Outside air flap (DM-ODA) Exhaust air flap (DM-EHA) ODA 3 ETA 4 EHA 1 SU 2 Mounting: Indoor installation (I) Outdoor installation (A) 1 EHA = Exhaust air 2 SU = Supply air 3 ODA = Outdoor air 4 ETA = Extract air 4

5 1.4 Block diagram - Filter - Fan ODA - Outside air - Heater - Temperature sensor EHA - Exhaust air - Cooler - Bypass ETA - Extract air - Heat exchanger - Flap SU - Supply air 5

6 2. Set-up 2.1 Air-tight housing The housing of the ComfoAir XL has a unique quality. The double seals on the panels ensure that the housing is perfectly air tight. The housing comprises a self-supporting structure that is made from doublewalled panels with internal insulation that is 44 mm thick. The panels are produced from sendzimir sheet with a weatherproof lastisol coating (Goosewing Grey RAL 7044) applied to the outside. A special polyester coating (RAL 7035) is applied to the inside. These panels are free from thermal bridges and guarantee excellent insulation of the housing. The draft focusses on compliance with the assive House Directive (internal and external leaks lower than 3 %). An overview of the specifications is provided below. Feature Mechanical strength Internal leak (at 400 a) External leak (at 400 a) Thermal insulation Thermal bridge factor Fire resistant Class 2A < 3 % of the nominal volume < 3 % of the nominal volume T2 (0,51 Wm2/K) TB1 B Angled profile 1. Foam 2. Sendzimir sheet 0.7 mm with lasticol coat RAL Sendzimir sheet 1.0 mm with powder coating RAL lastic profile with rubber shaft seal 5. Rubber shaft seal 6. lastic tubes 7. M8 screw 8. M8 nut Intermediate profile 1. olyurethane foam. Insulation thickness 40 kg/m 3 2. Outer skin: 0.7 mm pre-coated, galvanized sheet steel with lastisol coating 3. Internal coating: 1.0 mm pre-coated, galvanized sheet steel RAL lastic profile with rubber sealing lip 5. Dual rubber sealing tape 6. lastic connection tube 7. M8 screw 8. M8 nut 9. Aluminium sealing profile 10. Thermal E insulating foam 6

7 2.2 Fans The ComfoAir XL series consists of directly driven, energy-saving EC fans with backward-curved blades. These fans achieve an energy saving of more than 25 % compared to conventional AC fans. These fans are mounted vibration-free onto a mounting bracket. This obviates the need for flexible sleeves to ensure a vibration-free connection of the air ducts. Error message An alarm function is included in the control board as standard. This alarm function is activated if a fan fails. The error message can also be activated by measuring the pressure difference via the supply air filter if desired. 2.3 High-performance plate heat exchanger The HR cross-counterflow heat exchanger (HR plate heat exchanger) is made of high-grade aluminium and has a thermal efficiency of approx. 90 % depending on the outside temperature and the air humidity in the rooms. The exchanger is corrosionfree and resistant to seawater and can be fully recycled. Benefits of a high-performance plate heat exchanger: No wear Easy to maintain 100 % separate air streams Low risk of contamination Frost protection Under certain circumstances, condensate can freeze. To prevent this, frost protection is incorporated. This shuts down the supply fan when there is a risk of frost and can deactivate it for a short period. 2.4 Siphon A siphon is installed to remove condensate that forms in the plate heat exchanger. An external diaphragm siphon must be connected to remove the condensate that forms on the cooler. The siphon can be kept frost-free by using an insulated ribbon heating element. The contact for supply and control can be set in the software. 2.5 Bypass ComfoAir XL is equipped with a 100 % bypass. The control unit of the ComfoAir XL automatically brings the bypass valve to the closed and open positions. This bypass is located near the heat exchanger and is controlled by a counter-rotating bypass valve, which is controlled automatically by a servo motor. When the bypass valve opens, the extract air flows around the high-performance plate heat exchanger and no thermal transfer takes place. The filter system continues to work, however. In this way, it is possible to use what is referred to as 'free cooling' or night ventilation in the evening and during the night. lease also refer to the block diagram in chapter 1, section 4 for details of bypass operation. Outside air Extract air Exhaust air Supply air Open/closed or modulating bypass ComfoAir XL can be equipped with an open/closed or modulating bypass. The servomotor regulates the modulating bypass and ensures that the temperature of the supply air is constant. This is particularly important when the unit has a cooling battery. 2.6 Filter Two types of filters are available for filtering the supply and exhaust air flows: one cellular filter and a bag filter. The supply air flow is equipped with a F7 filter as standard, the exhaust air flow is equipped with a G4 filter. With the newly developed filter clamps, the filters are mounted onto the filter frame, which minimises leaks. The units are equipped with a filter monitor as standard. This is achieved with pressure sensors that measure the resistance via a filter to issue dirt notification. 7

8 2.7 Batteries The ComfoAir XL series can optionally be equipped with a pre-heater and post-heater or cooler. The battery connections are attached outside the unit. The control unit for these batteries is set up to be equipped with several power relays (230 V) and 0-10-volt outputs via the connection board of the unit. The connection board issues a 0-10 V signal to control the two-way valve. The power relay (230 V) is used to supply the circulation pump. The batteries must be connected to an externally fed cold and/or hot water supply. All batteries must be selected on a project-related basis. re-heater A pre-heater can be attached to pre-heat the cold outside air in winter. This heating battery is positioned in front of the heat exchanger and can be used as a frost protection system. The preheater is calculated on the basis of the water/glycol medium to prevent the battery from freezing. Cooling battery A cooling battery is used to cool the supply air. This battery is positioned behind the heat exchanger like the post-heater. The cooling battery is mounted on the drain plate to collect condensate. A polypropylene droplet catcher that runs to the drain plate is positioned behind the cooling battery in the direction of air flow. 2.8 Flaps Flaps can be used to protect the unit against outside influences when it is not in operation. The intake can be equipped with a lockable flap either for the outside air or the exhaust air. ost-heater The post-heater increases the temperature of the supply air. In this way, air can be blown in at a higher comfort temperature. The post-heater is located behind the heat exchanger in the direction of the air flow. 8

9 2.9 Design I J L Q H E K F C Q I J G B A D M N O C ComfoAir XL is equipped with the following components as standard: A: late heat exchanger with high-performance heat recovery B: Drain plate below the plate heat exchanger with siphon C: Two EC fans with backward-curved blades D: Main board E: Connection CB F: Operating switch ComfoAir XL is equipped with the following components as standard for mounting indoors: G: Metal support frame ComfoAir XL is equipped with the following components as standard for mounting outdoors: G: Support frame made of galvanised metal H: Coated metallic cover I: Two droplet catchers Options: J: anel or bag filter, filter class 7 for outside air and G4 for extract air K: Bypass valve open/closed or equipped with modulating servomotor L: re-heater to ensure controlled ventilation M: ost-heater for enhanced comfort N: Chiller for dehumidifying and cooling the supply air - O: Droplet catcher behind the cooler to collect moisture - : Drain plate with condensate drain below the chiller Q: Flap with servomotor 9

10 3 Control unit 3.1 Controller ComfoAir XL is equipped with a multifunctional controller. The control unit comprises two different CBs. The main board, to which all internal components can be connected, is located inside the unit. All external functions are bundled at the connection CB. This is located behind the designer front panel and is easily accessible to implement numerous connections. The units have an automatic frost-protection. Essential features: Connection to the building technology via ModBus communication Constant Air Flow: to set fixed capacities Filter monitoring: ressure sensors measure the resistance via the filter The unit software is equipped with a timeswitch as standard Control via external sensor: CO 2, pressure, relative air humidity Various connections: 230 V, power relay Generation of summer night cooling via digital input Compatible with fire alarm system via digital input Summer night cooling: activation via an external signal Frost protection for the high-performance plate heat exchanger: the supply fan is shut down when there is a risk of frost ComfoAir XL is easy to change over from constant air volume control to pressure control. This type of control requires a pressure sensor to measure the pressure in the supply air or extract air duct. 3.2 Supply An integrated operating switch is located at the operating side of the ComfoAir XL unit. The connection terminals and connection board are located behind the designer front panel. The board is equipped with a display as standard, which can be used easily to set the desired operating point. The power supply is connected to the operating switch. All versions, except for ComfoAir XL 6000, are equipped with a 230 V/50 Hz/1~ power supply. ComfoAir XL 6000 must be equipped with a 400 V/50 Hz/3~ power supply. 10

11 4. Quick selection 4.1 Coding ComfoAir XL 800 CFE R B I F CL RH OH DM-ODA DM ODA = Outside air flap DM EHA = Exhaust air flap OH = ost-heater RH = re-heater CL = Cooler F = Cellular filter BF = Bag filter I = Indoor installation O = Outdoor installation B = Bypass open/closed BM = Bypass modulating R = Right-handed version L = Left-handed version CFE = Counterflow plate heat exchanger roduct type designation (air volume in m³/h) 4.2 Selection schematic Overview of air capacity Type roduct family name : Capacity according to assive House Directive : Total capacity, reported at least 200 a. 11

12 4.3 Selection chart Type Air volume m³/s m³/s Air volume m³/h m³/h External static pressure (in connection with cooler, pre-heater and post-heater) a Max. consumed power (excluding cooler, pre-heater and post-heater) kw Voltage VAC Max. consumed power (excluding cooler, pre-heater and post-heater) A Frequency Hz Cos π - rotection system Fuse HEAT RECOVERY - Outside air conditions C/RH - Extract air conditions C/RH - Total heat recovery performance: % - Total heat recovery performance according to NEN 5138:2004 % COLD RECOVERY - Outside air conditions C/RH - Extract air conditions C/RH - Temperature efficiency (perceptible performance) % REHEATER Air volume m³/s Air volume m³/h - Temperature distribution water/glycol C/ C - Temperature distribution air C/ C - Heat output kw - ressure loss of water side ka - Water-side connection DN OST-HEATER Air volume m³/s Air volume m³/h - Temperature distribution water C/ C - Supply air temperature C/ C - Heat output kw - ressure loss of water side ka - Water-side connection DN COOLER Air volume m³/s Air volume m³/h - Temperature distribution water C/ C - Supply air temperature C - Cooling power kw - ressure loss of water side ka - Water-side connection DN 12

13 ComfoAir XL 800 ComfoAir XL 1500 ComfoAir XL 2200 ComfoAir XL 3300 ComfoAir XL 4400 ComfoAir XL ~ 230 1~ 230 1~ 230 1~ 230 1~ 230 3~ /60 50/60 50/60 50/60 50/60 50/ C (10 A) C (10 A) C (10 A) C (16 A) C (16 A) C (10 A) -10 /90 % -10 /90 % -10 /90 % -10 /90 % -10 /90 % -10 /90 % 21 /55 % 21 /55 % 21 /55 % 21 /55 % 21 /55 % 21 /55 % /60 % 28 /60 % 28 /60 % 28 /60 % 28 /60 % 28 /60 % 24 /55 % 24 /55 % 24 /55 % 24 /55 % 24 /55 % 24 /55 % /40 60/40 60/40 60/40 60/40 60/40-20/0-20/0-20/0-20/0-20/0-20/ /40 60/40 60/40 60/40 60/40 60/ /12 6/12 6/12 6/12 6/12 6/

14 5. Dimensions and weight 5.1 Indoor installation The dimensions refer to the above-mentioned standard unit, version with cellular filter (F). For these dimensions, a post-heater (OH) can be used as standard. Type L [mm] B [mm] H [mm] Air connection [mm] Weight [kg] ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x The following dimensions refer to the additional length of the optional components. Additional length Option [mm] Bag filter (BF) or pre-heater (RH) or empty section 350 Cooler (CL) or empty section 350 ComfoAir XL 800 and ComfoAir XL 1500 do not require an additional length; a pre-heater (RH) fits as standard here. 14

15 5.2 Exterior mounting The dimensions refer to the above-mentioned standard unit, version with cellular filter (F). For these dimensions, a post-heater (OH) can be used as standard. Type L [mm] B [mm] H [mm] Air connection [mm] Weight [kg] ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x ComfoAir XL x The following dimensions refer to the additional length of the optional components. Additional length Option [mm] Bag filter (BF) or pre-heater (RH) or empty section 350 Cooler (CL) or empty section 350 ComfoAir XL 800 and ComfoAir XL 1500 do not require an additional length for the RH; a pre-heater (RH) fits as standard here. 15

16 6. Technical data 6.1 Technical data, ComfoAir XL 800 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 16

17 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] ref L w,0 = W; 0 m distance. 17

18 6.2 Technical data, ComfoAir XL 1500 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 18

19 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] ref L w,0 = W; 0 m distance. 19

20 6.3 Technical data, ComfoAir XL 2200 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 20

21 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] ref L w,0 = W; 0 m distance. 21

22 6.4 Technical data, ComfoAir XL 3300 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 22

23 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] ref L w,0 = W; 0 m distance. 23

24 6.5 Technical data, ComfoAir XL 4400 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 24

25 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] ref L w,0 = W; 0 m distance. 25

26 6.6 Technical data, ComfoAir XL 6000 Specific fan power, pressure loss and sound level Supply air max. line Cooler supply air, pre-heater and post-heater Extract air max. line Sound level 26

27 Operating point Sound, supply air [a] Operating point Sound, extract air [a] Operating point Housing radiation [a] 125Hz ref L w,0 = W; 0 m distance. 27

28 7. Accessories SAG 0-3 V ComfoAir XL keeps the air volume constant. Output can be programmed in three air volume stages via a display. The SAG 0-3 CV switch can then be used to select the stages high, medium and low. The housing is white (RAL 9010) and ideal for installation in a fitted housing with a depth of 40 mm. A surface-mounted housing is available for mounting. CO 2/s sensor ComfoAir XL can also be controlled using a CO 2 sensor. A CO 2 sensor measures the CO 2 concentration in the ambient air at the position to which it is attached. The CO 2 sensor selects the air vent stage on the basis of the ventilation requirement in the room. If the CO 2 concentration is high, the ventilation stage is increased automatically. If the CO 2 concentration is low, the ventilation stage is reduced automatically. Diaphragm siphon A diaphragm siphon does not have a gooseneck; instead it comprises a non-return valve made of silicone rubber, which opens as soon as water presses against the membrane and closes again due to the vacuum in the unit. The siphon can be equipped on request with a heating cable to protect against frost or the formation of ice. Siphon heater Siphons are sensitive to frost. Siphon heating reduces the risk of frost damage. Joining piece All units are delivered with rectangular connections and tubtaras. They can be used to connect a drain from rectangular to round. 28

29 Z_SI_V0414_CSY_DAS_ComfoAirXL, en, subject to change without notice Zehnder Group Deutschland GmbH Sales International Almweg Lahr Germany T F sales.international@zehndergroup.com