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Prior to balancing, ensure that:

1. All sealing of the ductwork system has been

completed.

2. All of the HRV's components are in place and

functioning properly.

3. Balancing dampers are fully open.
4. Unit is on high speed.
5. After taking readings of both the stale air to the HRV

duct and fresh air to the house duct, the duct with the

lower CFM ([L/s] velocity) reading should be left alone,

while the duct with the higher reading should be

dampered back to match the lower reading.

6. Return unit to appropriate fan speed for normal

operation.

Balancing Procedure

The following is a method of field balancing an HRV using

a Pitot tube, advantageous in situations when flow stations

are not installed in the ductwork. Procedure should be per-

formed with the HRV on high speed.
Choose the straightest section of duct between the HRV

and the weatherhoods. This will be used for both the

supply and return ducts.
Drill a small hole in the duct (about 3/16"), three feet

downstream of any elbows or bends, and one foot upstream

of any elbows or bends. These are recommended distances

but the actual installation may limit the amount of straight

duct.
The Pitot tube should be connected to a magnehelic gauge

or other manometer capable of reading from 0 to 0.25 in.

(0 - 62 Pa) of water, preferably to 3 digits of resolution.

The tube coming out of the top of the Pitot is connected to

the high pressure side of the gauge. The tube coming out of

the side of the Pitot is connected to the low pressure or

reference side of the gauge.

Insert the Pitot tube into the duct, pointing the tip into the

airflow.
For general balancing it is sufficient to move the Pitot tube

around in the duct and take an average or typical reading.

Repeat this procedure in the other (supply or return) duct.

Determine which duct has the highest airflow (highest

reading on the gauge). Then damper that airflow back to

match the lower reading from the duct. The flows should

now be balanced.
Actual airflow can be determined from the gauge reading.

The value read on the gauge is called velocity pressure.

The Pitot tube comes with a chart that will give the air flow

velocity based on the velocity pressure indicated by the

gauge. This velocity will be either feet per minute or

meters per second. To determine the actual airflow, the

velocity is multiplied by the cross sectional area of the duct

being measured.

This is an example for determining the airflow in a 6" duct.

The Pitot tube reading was 0.025inches of water. From the

chart, this is 640 feet per minute.
The 6" (15.2 cm) duct has a cross sectional area of:

= [3.14 x (6"÷12)

]÷4

= 0.2 square feet

The airflow is then:
640 ft./min. x 0.2 square feet = 128 cfm

For your convenience, the cross sectional area of some

common round duct is listed below:

DUCT DIAM. (inches) CROSS SECTION AREA (sq. ft.)

5.0 (125 mm)

.14

6.0 (150 mm)

.20

7.0 (175 mm)

.27

Note: For best results keep Pitot tube

well away from dampers.

Pitot Tube

Figure A

Pitot Tube and Gauge

Figure B

Placement of the Pitot Tube

Pitot Tube Air Flow Balancing

Содержание CAF-D-L4A-36-P16

Страница 1: ...ED WITH AIRCOM ELECTRONICS Operation Sizing and Installation Manual Models CAF U S4A 24 P16 E16 CAF D S4A 24 P16 E16 CAF H S4A 24 P16 E16 CAF U L4A 36 P16 E16 CAF D L4A 36 P16 E16 CAF H L4A 36 P16 E16...

Страница 2: ...tion equipment CAUTION Assess how the operation of an HRV ERV may interact with already installed vented combustion equipment ie Gas Furnaces Oil Furnaces Wood Stoves etc CAUTION Table of Contents 2 T...

Страница 3: ...water for the heating system as well as other household uses Once it is correctly installed safety will never be an issue with your LIFEBREATH furnace No flames fumes or flue gases to be concerned ab...

Страница 4: ...om Exhaust System Kit Part 99 CAF BESKIT if you wish to exhaust from specific locations such as bathrooms Description and Purpose Operation Heating Cooling When the room thermostat calls for heat it a...

Страница 5: ...t is being exhausted ERV Enthalpic Paper Core An Energy Recovery Ventilator ERV is designed to pro vide fresh air into a building while exhausting an equal amount of stale air An ERV is designed for u...

Страница 6: ...ater systems that incorporate a pressure tank i e well systems are normally Open Systems and most municipal water systems are Closed Systems Drain Valve A drain valve is required to allow the heating...

Страница 7: ...ater conditions Note Take care during soldering to avoid debris or solder from lodging in the check valve Note It is critical to follow the piping configuration shown Maintain a minimum distance of 12...

Страница 8: ...heater downstream of the heating loop connection and upstream of any domestic hot water connection The purpose of the valve is to limit the maximum tempera ture available for domestic hot water by mi...

Страница 9: ...se reduced bore ball valves as they are very restrictive to water flow Gate Valve The Gate Valve can be used as a shut off or drain valve When in the open position there is very little resistance to f...

Страница 10: ...as there is a 20 F 11 C temperature drop between the hot water supplied to the air handler and the returning water A temperature drop less than 20 F 11 C can cause the water heater thermostat not to i...

Страница 11: ...of water connections for the unit being installed Push fit Fittings instantly make plumbing connections thereby eliminating the need for solder Be sure to read the Push fit Fitting Installation Instru...

Страница 12: ...loop system The piping and fittings used to connect the water heater and air handler must be sized to handle the volume of hot water required by the air handler within the pressure limitations of the...

Страница 13: ...nt of heat which can be transferred is also reduced Air Handler Temperature Rise In a fuel fired furnace the combustion gases can be 1000 F 538 C above the return air temperature These units typically...

Страница 14: ...ent heat loss and possible freezing of the line Look inside the furnace and locate the pump Attach the Hot Water In Supply to the pipe running to the pump Attach the Hot Water Out Return to the pipe r...

Страница 15: ...on the pump should be calculated Duct Connections To accommodate various installations the Clean Air Furnace has knockouts for the return air plenum and ventilation ducts on both sides of the cabinet...

Страница 16: ...nsulated ducting with a vapor barrier such as flex ducting or ridged pipe wrapped in pipe sleeve is required to prevent condensation from occurring on the pipe Also the airflow in these lines is desig...

Страница 17: ...h The ductwork from the outside weatherhoods to the unit is usually flexible ducting although rigid pipe may be needed if the runs are greater than 10 feet In either case the pipes both exhaust and su...

Страница 18: ...he tube coming out of the side of the Pitot is connected to the low pressure or reference side of the gauge Insert the Pitot tube into the duct pointing the tip into the airflow For general balancing...

Страница 19: ...cks when pressure is released When connecting ductwork to the collar take note where screws are located Screws should be located no further than 1 2 12 70 mm from out side edge of collar so as not to...

Страница 20: ...ric style heat Off Season Circulation Timer Water is periodically circulated through the space heating loop during the summer and other periods of infrequent use The concern is that water which remain...

Страница 21: ...I PEUT AJUST LES COMMUTATEURS DIP CHASSIS T44 T3 T4 T5 T6 Line Ligne T1 T2 T13 T14 T15 T16 Neutral Neutre T11 T12 2 AMPS SW1 ON 8 7 6 5 4 3 2 1 T21 T22 T23 T24 AUX 1 AUX 2 Standard 24 Volt Thermostat...

Страница 22: ...t should be active on a system Optional Dehumidistat Part 99 DH 01 80 20 Instruction card Dehumidistat Indicator LEDs Set to the desired humidity level High speed ventilation will initiate when the in...

Страница 23: ...T31 T32 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 Contact 1 N 0 COM N C N 0 COM N C N 0 COM N C N 0 COM Contact 2 Contact 3 Contact 4 Digital Controls DIP SWITCHES TO BE ADJUSTED BY QUALIFIED TECHNICIA...

Страница 24: ...K7 K1 K2 K8 T31 T32 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 Contact 1 N 0 COM N C N 0 COM N C N 0 COM N C N 0 COM Contact 2 Contact 3 Contact 4 N C Boiler Contact T30 T29 T28 T43 SPARE P3 MAX 2 amp R...

Страница 25: ...necessary connections have been made the Clean Air Furnace Start Up Procedure is as follows 1 Close shut off valves separating the Clean Air Furnace from the water heater 2 Set up water heater accordi...

Страница 26: ...moisture Inspect operation of blowers and electrical panel Confirm operation Clean Core Twice a Year a Open access door b Carefully grip ends of core and pull evenly outward Core may be snug but will...

Страница 27: ...hen air remaining in the lines interfere with their operation If this occurs re purge the system as indicated in the Start Up Procedure HRV core freezes up 1 Make sure that the supply and exhaust line...

Страница 28: ...utes ON 40 minutes OFF Controlling your HRV High indoor humidity levels are apparent from the visible condensation on windows The amount of condensation on the windows will increase as outdoor tempera...

Страница 29: ...Motor 120V 60Hz E16 Upgrade ECM Motor 120V 60Hz Example Model Number CAF U S2A 24 P16 CFM High Speed Cooling Capacity Model Configuration CAF Clean Air Furnace Built in HRV Refer to AH Air Handler sp...

Страница 30: ...100 ft length OPTIONAL TIMERS 99 DET01 Lifestyle 20 40 60 Minute Timer Initiates high speed ventilation for 20 40 60 minutes 3 wire 20 gauge wire minimum 100 ft length 99 20M01 Lifestyle 20 Minute Ti...

Страница 31: ...side Case Pre painted galvanized steel for superior corrosion resistance Side Front 29 5 749 mm 19 483 mm 47 5 1207 mm 6 150 mm 12 305 mm 4 100 mm Top 29 5 749 mm 22 559 mm 19 483 mm 14 356 mm Bottom...

Страница 32: ...ilation 100 140 CFM Airflow Effectiveness 70 Aluminum Core Total Efficiency 50 Enthalpic Core Net Weight 150 lbs Shipping Weight 165 lbs OPTIONS 99 186 Weatherhoods Two 6 150 mm c w 1 4 6 mm mesh scre...

Страница 33: ...Weight 165 lbs Note Ventilation ports and return plenum opening available off either side of cabinet All units conform to CSA and UL Standards Options 99 186 Weatherhoods Two 6 150 mm c w 1 4 6 mm mes...

Страница 34: ...Copper Connections Soldered Connection Airflow High 25 in wg 1350 CFM 5 in wg 1180 CFM Ventilation 100 140 CFM Airflow Effectiveness 70 Aluminum Core Total Efficiency 50 Enthalpic Core Net Weight 150...

Страница 35: ...on the energy recovery enthalpic core and a five year replacement parts warranty on all other components info lifebreath com Date ___________________________________________ Tag _____________________...

Страница 36: ...Dehumidistat Initiates high speed ventilation for 20 40 or 60 minutes 3 wire 20 gauge wire minimum 100 ft length OPTIONAL TIMERS 99 DET01 Lifestyle 20 40 60 Minute Timer Initiates high speed ventilat...

Страница 37: ...for 20 40 or 60 minutes 3 wire 20 gauge wire minimum 100 ft length OPTIONAL TIMERS 99 DET01 Lifestyle 20 40 60 Minute Timer Initiates high speed ventilation for 20 40 60 minutes 3 wire 20 gauge wire m...

Страница 38: ...n section 1 25 mm pleated in return plenum side Case Pre painted galvanized steel for superior corrosion resistance Dimensions Clearances Model CAF U 00 36 P16 Voltage 120 VAC 60 Hz Hp 1 2 Amps total...

Страница 39: ...n section 1 25 mm pleated in return plenum side Case Pre painted galvanized steel for superior corrosion resistance Dimensions Clearances Model CAF U 00 48 P16 Voltage 120 VAC 60 Hz Hp 1 2 Amps total...

Страница 40: ...system meet the designed parameters The following conditions are assumed The air filter is in place All supply diffusers and return grilles are fully open and unrestricted Hot water is available to th...

Страница 41: ...41...

Страница 42: ...ntegrated Combo System Design part B Total Heat Loss Btu h Air Handler ESP ins W C Supply Water temp F Air Handler output Btu h Btu h Eff Water Heater output Return Water temp F F F Supply Air temp Re...

Страница 43: ...32 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 Contact 1 N 0 COM N C N 0 COM N C N 0 COM N C N 0 COM Contact 2 Contact 3 Contact 4 Digital Controls Contr les num riques N C R W Y G A C Unit Unit A C Therm...

Страница 44: ...N 0 COM N C N 0 COM Contact 2 Contact 3 Contact 4 Digital Controls Contr les num riques N C R W Y G A C Unit Unit A C Thermostat To Y To C ORANGE N O Normally open Normalement ouvert N C Normally clo...

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Lifebreath CAF-D-L4A-36-P16, Инструкция по эксплуатации, размерам и установке

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