Ventilation Unit Zehnder ComfoAir 550

TS108 - 1 2015.03.23

Use The ComfoAir 550 ventilation unit was developed for residential and small commercial buildings. It combines maximum comfort, simple operation and very high efficiency. The CA550 moves up to 324 cfm of air at 0.80" wc

Efficiency The integrated cross-counterflow heat exchanger achieves an efficiency of up to 84% (according to testing by the Passive House Institute). For user comfort this means no unpleasant cold drafts, because the supply air is heated nearly to room temperature, even when external temperatures are very low.

Fans The supply fan and extract fan are driven by efficient DC motors. Differential pressures in the supply and extract air distribution systems can be adjusted thanks to individual control. The especially quiet fans can be adjusted to the required volumetric flow in 1% increments. The air volumes of the selectable stages can be set to between 29 cfm and 324 cfm.

Filters The CA550 is equipped with two class G4 filters (MERV 7/8). An optional class F7 pollen filter (MERV 13) is available for fresh air intake.

Installation The CA550 can be wall-mounted or floor-mounted (with optional base). Connections for air and wiring are on the top of the unit. The condensate drain is located on the bottom of the unit.

Operation The CA550 is controlled by the ComfoSense control unit, typically installed in the living area. Optional, wireless remote control units are installed in bathrooms for timed boost mode.

Maintenance Maintenance of the CA550 is limited to periodic cleaning or replacement of the filters accessible from the front of the unit. The exchanger core should be inspected and cleaned annually (depending on outside air quality). Please see the unit manual for additional servicing tasks.

Frost protection If the ventilation unit is operated without an optional geothermal heat exchanger, condensate in the extract air may freeze. The frost protection setting prevents this by variably reducing the supply air volume. An optional, integrated electric preheater warms incoming fresh air to prevent the heat exchanger from freezing even at very low temperatures.

ComfoSense controller

Filter G4

Remote Control Timer

Filter F7

Ventilation Unit Zehnder ComfoAir 550

TS108 - 2 2015.03.23

Bypass During summer nights and in the “shoulder” seasons of spring and fall with strong sunshine, the house can become too warm, while the outside temperature remains pleasantly cool. In such cases, heat removal by what is known as “free cooling” helps: The CA550 is equipped with a standard automatic bypass for just this purpose, and diverts 100% of the relatively warm extract air from the heat exchanger, introducing cool supply air to the space.

Options

• Humidity recovery with the Zehnder enthalpy exchangerWhen the CA550 is fitted with an enthalpy exchanger core, thehumidity from the extracted air is partly transferred to the fresh supplyair. In this case, the process of drying out the house in dry wintermonths is delayed. Additionally, there is no condensate that must bedrained from the ComfoAir. Therefore a condensation drain is notnecessary with an enthalpy exchanger.

The Zehnder enthalpy exchanger provides the ideal hygienic solution.Supply and extract air flows are kept completely separate so there isno transfer of odors or bacteria.

• Pollen filter (F7/MERV 13)A pollen filter installed in the intake air line (upstream of the heatexchanger) keeps the inside of the house pollen-free and reducesparticulates, spores and germs so occupants can breathe freely intimes of increasing allergies.

• Zehnder ComfoFond-L ground-coupled heat exchangerThe ComfoFond-L uses the ground as passive storage via a brine(glycol) loop. In summer, it transfers heat from intake air to the groundand in winter it withdraws heat from the ground to warm the incomingsupply air.

• Electric post-heaterAn external electric post-heater guarantees a defined supply airtemperature, even in extreme climatic conditions and on systemswithout a geothermal heat exchanger.

• Wireless remote controlWith the Zehnder wireless remote control, the CA550 can be controlledfrom locations throughout the house, apartment, classroom, etc.Typically, one is installed in each bathroom to provide a boost function.

• Open fire programThe ventilation system can be installed in a home with a fireplace,wood stove, etc. but must be accounted for in the control unit. Byindicating in the ComfoSense control unit the presence of a fireplace,negative pressure and possible back-drafting of unpleasant fumesand/or harmful gases can be avoided.

Ventilation Unit Zehnder ComfoAir 550

TS108 - 3 2015.03.23

Benefits

• Comfort ventilation up to 324 cfm• Heat recovery with an efficiency of up to 84% (according to PHI)• Moisture recovery with optional Zehnder enthalpy exchanger• Low power consumption thanks to DC motors• Automatic summer bypass• Frost protection function• Quick, safe installation, maintenance and servicing• Simple operation• Optional, integrated electric pre-heater• Can be coupled with ComfoFond geothermal heat exchanger• Integrated controller for geothermal heat exchanger• Wireless remote control/boost switch• Filter replacement indicator• Electric and hydronic post-heater integration possible• CO2 control (optional)• Relative humidity control (optional)

Article Numbers

L = supply air left

R= supply air right

VV = integrated electric pre-heater

Product Article Number Reference Number

CA550 HRV-L 471 332 210 9252

CA550 HRV-R 471 332 215 9253

CA550 HRV-VV-L 471 332 230 9305

CA550 HRV-VV-R 471 332 235 9436

CA550 ERV-L 471 332 450 9254

CA550 ERV-R 471 332 455 9255

CA550 ERV-VV-L 471 338 540 9437

CA550 ERV-VV-R 471 338 545 9438

Accessories Article Number Reference Number

ComfoSense controller 655 010 215 9257

Wireless remote control 655 000 755 9238

ComfoAir 550 Assembly Base 642 300 140 9287

Waterless P-Trap 990 201 330 9362

Filters Article Number Reference Number

G4 (MERV 7/8) 1pc 006 040 202 9240

F7 (MERV 13) 1pc 006 040 250 9241

Ventilation Unit Zehnder ComfoAir 550

TS108 - 4 2015.03.23

Technical Specifications

Heat Exchanger:

Fans:

Filters:

Polystyrene

ECM direct current, radial fans

(2) Class G4 (MERV 7/8), F7 (MERV 13) optional

Condensate Connection: 32mm

Air Duct Connection: 7” ID nominal (x4)

Electrical Connection: 230v, 50-60Hz

Acoustic Performance: Extract air (min – max): 28 - 63 dB(A)

Supply air (min – max): 35 - 79 dB(A)

Heat Recovery: 84% (according to PHI)

Volumetric Flow: 29cfm - 324cfm

Power Consumption: 13W – 350W

Dimensions: Height: 31.5”

Width: 28.5”

Depth: 22.4”

Weight: 103.6 pounds (47kg)

Versions: ComfoAir HRV 550-L

ComfoAir HRV 550-R

ComfoAir HRV 550-VV-L

ComfoAir HRV 550-VV-R

ComfoAir ERV 550-L

ComfoAir ERV 550-R

ComfoAir ERV 550-VV-L

ComfoAir ERV 550-VV-R

Manufacturer: Zehnder Group Nederland B.V.

Lingenstraat 2 

8028 PM Zwolle

NETHERLANDS

TS108 - 5

28.5" 22.2"

7.9"

7.0"

10.4"

Ø 32

8.2"

19.3"

8.2"

31.5

"22

.4"

4.9"

11.1

"

19.7

"

31.5

"

31.1

"

Space requirements for electrical connection

Space requirements for electrical connection

Space requirements for servicing

Location of Condensate drain right-hand unit

Location of Condensate drain left-hand unit

Ventilation Unit Zehnder ComfoAir 550

Dimensional drawing

2015.03.23

Floor

10"

min

.

987654321

Ventilation unit Zehnder ComfoAir 550

"WC4.01

3.61

3.21

2.81

2.41

2.00

1.61

1.20

0.80

0.40

0 59 118 177 235 294 353 412 471 530 cfm

TS108 - 6

Stage Speed Air volume Pressure Power

consumption

Current

consumption

COS φ Installed noise level

Weight

Qv Δ P st Extract air Supply air

% cfm " WC W A (-) dB(A) dB(A) lb

ComfoAir 550Zehnder

(1) Absent 15% 29 0.02 13 0.12 0.47 28 35 103.6

(2) 30% 82 0.12 26 0.22 0.51 38 50

(3) Stage 1 40% 106 0.24 41 0.35 0.51 44 58

(4) 50% 132 0.40 69 0.57 0.53 48 63

(5) 60% 165 0.60 110 0.86 0.56 52 67

(6) Stage 2 70% 194 0.86 160 1.21 0.57 55 71

(7) 80% 224 1.14 220 1.65 0.58 59 74

(8) 90% 253 1.45 310 2.22 0.61 63 78

(9) Stage 3 100% 271 1.65 350 2.459 0.62 63 79

Zehnder ComfoAir 550

2015.03.23

Zehnder ComfoAir 550Ventilation unit

Sound, supply air

Ventilation unit

Type Speed 125 Hz

Acoustic performance at the intake air connection

250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz

ComfoAir 550 9 78 78 79 69 70 66 53

ComfoAir 550 8 78 77 77 67 69 65 52

ComfoAir 550 7 75 75 73 66 66 61 48

ComfoAir 550 6 73 72 70 63 63 56 43

ComfoAir 550 5 70 70 66 58 58 51 38

ComfoAir 550 4 67 68 61 53 53 44 32

ComfoAir 550 3 63 65 55 45 44 35 24

ComfoAir 550 2 56 55 47 37 37 25 14

ComfoAir 550 1 45 39 29 26 21 9 12

Sound, extract air

Ventilation unit Acoustic performance at the extract air connection

Type Speed 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz

ComfoAir 550 9 67 66 63 51 49 42 33

ComfoAir 550 8 66 65 64 50 47 41 3

ComfoAir 550 7 63 62 60 48 45 37 27

ComfoAir 550 6 60 60 54 45 41 33 23

ComfoAir 550 5 57 57 50 41 37 28 20

ComfoAir 550 4 52 55 46 36 32 21 18

ComfoAir 550 3 46 51 38 29 25 14 13

ComfoAir 550 2 45 44 33 27 18 8 11

ComfoAir 550 1 40 29 22 20 3 6 13

Sound, unit emission

Ventilation unit

Type Speed

Acoustic performance at the extract air connection

125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz db(A)

ComfoAir 550 9 57 56 53 46 44 54

ComfoAir 550 8 56 55 52 45 43 53

ComfoAir 550 7 53 52 50 42 40 50

ComfoAir 550 6 50 49 48 39 36 48

ComfoAir 550 5 47 47 46 34 32 45

ComfoAir 550 4 44 45 39 30 27 41

ComfoAir 550 3 38 41 32 24 21 35

ComfoAir 550 2 37 36 27 20 15 28

ComfoAir 550 1 26 29 20 19 17 25

TS108 - 7 2015.03.23

Ventilation unit Zehnder ComfoAir 550

TS108 - 8 2015.03.23

Ventilation unit Zehnder ComfoAir 550

Zehnder America, Inc. · 540 Portsmouth Ave. · Greenland, NH 03840 · USA

T +1 603 422 6700 · Toll Free: 888 778 6701 · F +1 603 422 9611

info@zehnderamerica.com · www.zehnderamerica.com

TS108 - 8 2015.03.23