Bryant ERVBBLHU1150, ERVBBLHU1200 Installation, Start-up, And Operating Instructions Manual

Page 1

Installation, Start-Up, and Operating Instructions

ERVBBLHU ENERGY RECOVERY VENTILATOR

NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .....................................................1

INTRODUCTION ..........................................................................1

INSTALLATION CONSIDERATIONS .......................................1

Inspect Equipment ....................................................................1

Select Location..........................................................................2

COMPONENT DESCRIPTION ....................................................2

INSTALLATION ...........................................................................3

Mount Unit................................................................................3

Independent System Application..............................................3

Forced-Air Application.............................................................3

Connect Ducts to ERV .............................................................3

Locate and Install Exterior Hoods ...........................................3

Condensate Drain......................................................................4

Wall Control..............................................................................4

ELECTRICAL CONNECTIONS ..................................................4

115–vac Wiring.........................................................................4

12–vdc Wiring ..........................................................................4

ACCESSORIES..............................................................................4

Interlock Relay..........................................................................4

20 Minute Timer.......................................................................5

60 Minute Adjustable Timer ....................................................5

BALANCING ERV .......................................................................5

Balancing Dampers...................................................................6

Flow Collar ...............................................................................6

CONTROL BOARD OPERATION ..............................................8

Board Function..........................................................................8

Defrost.......................................................................................8

OFF and INTERMITTENT/OFF Mode...................................8

High-Speed Air Exchange ........................................................8

Low-Speed Air Exchange.........................................................9

CARE AND MAINTENANCE.....................................................9

Door.........................................................................................10

Filter ........................................................................................10

Blower Motor and Wheel.......................................................10

Cleaning Core .........................................................................10

TROUBLESHOOTING ...............................................................10

Wall Control............................................................................10

Control Board..........................................................................10

Blower Motor..........................................................................10

Blower Speed Selection..........................................................11

SAFETY CONSIDERATIONS

Installation and servicing of this heating equipment can be hazardous due to mechanical and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on this equipment, observe precautions in the literature, on tags, and on labels attached to or shipped with the unit and other safety precautions that may apply.

Cancels: II ERV-64–2 II ERV-64–3

4–05

A00092

Fig. 1–ERVBBLHU Energy Recovery Ventilator

Follow all safety codes. Installation must be in compliance with local and national building codes. Wear safety glasses and work gloves. Have a fire extinguisher available during start-up and adjustment procedures and service calls.

Recognize safety information. This is the safety-alert symbol When you see this symbol on the furnace and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, or CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard that could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in personal injury or product or property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability or operation.

INTRODUCTION

The ERVBBLHU Energy Recovery Ventilator (ERV) is used to exchange indoor stale air with outside fresh air. The ERV unit is equipped with a special energy recovery core which transfers both sensible and latent heat with the fresh incoming air. The cross-flow design core allows entering and leaving air streams to transfer heat energy without mixing (See Fig. 14).

The model ERVBBLHU is available in 2 sizes with airflow ranges of 64–152 CFM, and 117–214 CFM. The design of this unit is horizontal. Special attention should be given to duct application, balancing the ERV, and locating unit for easy access and routine maintenance.

INSTALLATION CONSIDERATIONS

I. INSPECT EQUIPMENT

Move carton to final installation location. Remove ERVBBLHU from carton taking care not to damage unit. Remove all packaging and inspect unit for damage. Remove parts bag from inside unit. File claim with shipping company if shipment is damaged or incomplete. Check to make sure ERV unit matches Fig. 2.

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⁄16"

(56.2)

⁄4"

(120.6)

4 PLCS

20"

(508.0)

(25.4) 2 PLCS

⁄16"

(58.7)

⁄8"

(460.4)

(428.6)

⁄8" DIA

(149.2) 4 PLCS

⁄8"

15"

(381.0)

⁄4"

(768.3)

NOTES:

1. FRESH AIR FROM OUTSIDE TO ERV

2. FRESH AIR FROM ERV TO HOUSE

3. STALE AIR FROM HOUSE TO ERV

4. STALE AIR FROM ERV TO OUTSIDE

MODEL NO. A B C D E F G

in. mm. in. mm. in. mm. in. mm. in. mm. in. mm. in. mm.

ERVBBLHU1150 15-1/8 384.2 4-1/16 104 5-5/8 143.3 14-1/2 368.9 10-3/8 288.9 4-3/8 111.3 7-3/4 196.9 ERVBBLHU1200 19 483 5-13/16 147.7 5-1/16 128.6 14-1/2 368.9 11-3/16 283.9 4-3/8 111.3 10-1/16 255.6

Fig. 2–Dimensional Drawing ERVBBLHU

II. SELECT LOCATION

The ERV should be located in a conditioned space and in close proximity to a fused power source. It should be easily accessible for routine maintenance.

If ERV is installed independent of a forced-air system, unit should be located near the center of the air distribution system. If ERV is installed in conjunction with a forced-air system, unit should be located next (or close to) the indoor equipment.

COMPONENT DESCRIPTION

The following lists components of the ERVBBLHU (See Fig. 3).

1. Stale air return from building connected to return-air duct system.

2. Fresh-air intake connected to outdoor-air inlet hood.

Fig. 3–ERVBBLHU Cross-Flow

3. Exhaust-air connected to outdoor-air exhaust hood.

4. Mechanical filters trap dust contained in the air.

5. Energy recovery core is a cross-flow type. It transfers sensible and latent energy between the 2 airstreams.

6. Blowers bring in fresh-air from outside and exhaust stale-air to outside.

9. Terminal connector block for wiring wall and timer controls.

10. Electrical cord connects to standard 115–v outlet.

11. Damper motor.

7. Electronic control circuit board ensures proper operation of unit.

8. Fresh-air supply connected to return-air duct system.

A00093

A00113

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Maximum length of duct for the system should be designed according to the highest speed of the unit. Refer to specifications listed in unit Product Data Sheet for ventilation capacities.

III. FORCED-AIR APPLICATION

Most ERV applications will be installed in conjunction with new or existing forced-air systems. To operate properly, the fresh-air supply and stale-air return from ERV connect directly to return-air duct system. This is how the ERV distributes fresh air and removes stale air from inside of the building (See Fig. 7). For these installations, furnace or fan coil blower must be interlocked and operate continuously whenever ERV is energized.

→

Interlock relay kit Part No. KVAAC0101VIR is available and designed to interlock ERV with indoor equipment blower. When ERV is energized, R and G circuit inside of furnace or fan coil will energize. See Fig. 10 and interlock relay kit for additional information and Installation Instructions.

NOTE: The fresh air from ERV is introduced into return-air duct at a point no less than 6 ft upstream of furnace or fan coil. This connection should be direct (See Fig. 7). This is to allow incoming fresh-air to mix before entering indoor equipment.

IV. CONNECT DUCTS TO ERV

A92269

Fig. 4–Chain Spring Installation

INSTALLATION

CAUTION: UNIT DAMAGE HAZARD

Failure to follow this caution may result in reduced life of this unit. Do not install ERV in a corrosive or contaminated atmosphere.

I. MOUNT UNIT

The ERV can be suspended from floor joists or rafters using chains and 4 springs. Attach a metal hanging bracket to all 4 sides of the cabinet (See Fig. 4). The unit may be installed on a shelf, if an isolation pad is provided to dampen vibration. Unit should always be installed as level as possible.

II. INDEPENDENT SYSTEM APPLICATION

In the absence of a forced-air system and a typical duct system layout, the ERV can be applied as an independent stand alone unit. To ensure comfort, this type of application involves running both fresh-air, and return-air registers (or stale-air pick-up registers) throughout the home.

CAUTION: CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury or death. Do not install return-air registers (or stale-air pickup registers) in same room as gas furnace or water heater

Fresh-air registers are normally located in bedrooms, dining rooms, living rooms, and basements. It is recommended that registers be placed 6 to 12 in. from the ceiling on an interior wall and airflow directed towards ceiling. If registers are floor installed, airflow should be directed toward the wall.

Return air (or stale-air pickup registers) are normally located to draw from kitchen, bathroom, basement, or other rooms where stale-air can exist.

Proper size and type of registers must be used to minimize pressure drop. The velocity of airflow through register should not be above 400 feet per minute.

CAUTION: PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in minor property damage from sweating duct or loss of unit efficiency and capacity. ERV should be installed in a conditioned space with insulated flex duct for supply and exhaust air to the outdoor ambient.

Insulated flexible duct is required on both fresh-air inlet and exhaust-air outlet ducts connecting to exterior wall. When using insulated flexible duct, the vapor barrier of the flexible ducts must be taped very tight to prevent condensation problems. To reduce pressure drop, stretch the flex duct and support it in a proper manner to avoid reduced airflow.

When connecting the ERV to a return-air duct system, insulated flexible duct can be used. However, when metal or rigid ducts are applied use approximately 18–in. of flexible duct at ERV ports for fresh-air supply, and stale-air return (See Fig. 6). This can act as a silencer when connecting ducts to return-air duct system. This should eliminate transmission of noise or vibration from unit to main duct system. In addition, there are four 30–in. duct ties provided to help fasten flexible duct to port on ERV.

V. LOCATE AND INSTALL EXTERIOR HOODS

IMPORTANT: To prevent condensation problems, insulated

flexible ducts are required on both fresh-air inlet and exhaust-air outlet ducts connecting between ERV and exterior wall.

Fresh-air intake and stale-air exhaust must be separated by at least 6 ft. Fresh-air intake must be positioned at least 10ft. from nearest dryer vent, furnace exhaust, driveway, gas meter, or oil fill pipe. Fresh-air intake must be positioned as far as possible from garbage containers and potential chemical fumes. When possible, it is advised to locate the intake and exhaust hoods on same side of house or building. The intake and exhaust hoods should never be located on interior corners or in dead air pockets. (See Fig. 7) Both intake and exhaust hoods must be 18 in. from ground and at least 12 in. above anticipated snow level.

After selecting proper hood locations, make appropriate size hole through exterior wall, pass flexible duct through hole and insert hood tube into duct. Tape duct vapor barrier tightly around hood tube and insert assembly back into wall and fasten securely.

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A99268

Fig. 5–Condensate Drain With Loop Trap

FLEXIBLE DUCT

FRESH-AIR SUPPLY

DUCTS CONNECTING TO

RETURN-AIR DUCT SYSTEM

STALE-AIR RETURN

A98382

Fig. 6–Flexible Duct Fit-Up

VI. CONDENSATE DRAIN

To connect condensate drain, proceed as follows:

1. Insert sleeved grommets into bottom of unit using the gasket washer and nut (See Fig. 5).

2. Cut two sections of plastic tubing, about 12” long and attach them to each drain.

3. Join the two short sections of tubing to the “T” connector and the main tube as shown.

4. Make a loop in the tubing below the “T” connector to create a trap to prevent sewer gases from entering the ventilation system (See Fig. 5).

5. Connect unit drain to building’s main drain. Provide slight slope from unit for run-off.

VII. WALL CONTROL

1. Location

The ERV wall control is unique to this unit. The ERV will not operate without it. This control senses humidity not temperature. It must be located in an area where it will continually monitor fresh

air circulating within the home. Install ERV wall control as close as possible to main system thermostat and follow same guidelines as installing a thermostat (locate approximately 5 ft. above floor, mount on an inside partitioning wall, etc.).

2. Wiring

Remove top cover assembly from wall control and pass thermostat wire through hole located on back of control before attaching to wall. Connect Y, R, G, and B (yellow, red, green, and black) between wall control and ERV circuit board following color code (See Fig. 8 and 9). Replace top cover assembly. NOTE: ERV wall control and circuit board operate on 12vdc.

3. Operation

The ERV wall control has 3 basic modes of operation, OFF, LOW, and INTERMITTENT. Be sure that all modes of operation are fully functional. See Table 1 indicating standard control operation. OFF — When wall control is OFF, ERV is de-energized and both LED’s are off. LOW — This mode ensures continuous air exchange with outside at all times. If relative humidity level inside of building is higher than setpoint, then air exchange will occur at low speed. If relative humidity level inside of building is lower than setpoint, then air exchange occurs at high speed. INTERMITTENT — If relative humidity level inside of building is higher than setpoint, then no air exchange will occur and ERV shuts off. If relative humidity level inside building is lower than setpoint, then air exchange occurs at high speed, and shuts down ERV when humidity level reaches set point. This mode is ideal for maintaining proper humidity level when continuous mode cannot. To ensure highest degree of humidity control in cooling season, intermittent mode should not be used.

4. Humidity Selection

The humidity selector is a built-in humidity controller designed to properly control humidity level in a house during summer months. This acts like a limit switch. See Table 2 to select maximum humidity level. If the house becomes too dry in winter months, put wall control in INTERMITTENT mode and turn down humidity selector to provide ventilation less frequently.

5. Latent Control

NOTE: To ensure highest degree of humidity control in cooling season, the INTERMITTENT mode should be used. See Table 1 and reference LOW and INTERMITTENT control operation listed above.

ELECTRICAL CONNECTIONS

I. 115–VAC WIRING

The ERV operates on 115vac. It comes with a power cord attached to unit and ready to plug into a fused outlet. Unit must be grounded for proper operation. All electrical connections must comply with National and Local Electrical Codes, or other ordinances that might apply.

CAUTION: ELECTRICAL / FIRE HAZARD

Failure to follow this warning could result in property or unit damage. Do not use an extension cord as a power source for operating the ERV.

II. 12–VDC WIRING

The ERV circuit board, wall control, and accessories operate on 12vdc. See section, Wall Control, item Wiring, and Fig. 8 and 9 for more information.

ACCESSORIES

I. INTERLOCK RELAY

→

The interlock relay kit, Part No. KVAAC0101VIR is required when installing ERV into a forced-air heating and cooling system (See Fig. 10). Mount interlock relay inside of unit below control box assembly. For additional information, refer to Installation Instructions supplied with the interlock relay kit.

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The purpose of the interlock relay kit is to energize indoor system equipment (furnace or fan coil) blower whenever ERV is calling. If ERV is energized, and indoor system equipment is not, interlock relay will energize and make R and G at indoor equipment. This will insure fresh air distribution throughout the building via the central duct system.

II. 20 MINUTE TIMER

A push button timer can be used to override the wall control and put ERV into high speed for 20 minutes. Connect switches in parallel and connect leads to ERV terminals I, OC, and OL. (See Fig. 10) Push button locations are ideal in special activity areas, such as bathrooms, or kitchens, where high-speed exhaust operation is needed for a short period of time.

NOTE: The 20 minute timer will not function properly unless ERV wall control is applied and working correctly. Timing function is internal to electronic circuit board. It is activated by a momentary contact between OC and OL. The I connection is to illuminate the push button. The maximum number of push button timers that can be applied is 5.

III. 60 MINUTE ADJUSTABLE TIMER

A 60 minute adjustable timer can also be used to override wall control and put ERV into high-speed operation for a select amount of time. Connect timer in parallel with push button timers, or to ERV terminals OC and OL (See Fig. 11).

The 60 minute timer will provide a minimum of 10 minutes, and a maximum of 60 minutes of ventilation at high speed.

BALANCING ERV

Balancing intake and exhaust airflow is very important for proper system operation and optimum performance when applying an ERV. Unit balancing prevents a positive and/or negative pressure within a home. Balancing the ERV is done by applying temporary flow collars and adjusting the balancing dampers to the fresh air intake and stale air exhaust ducts (See Fig. 12). Airflow is temporarily determined by connecting a magnehelic gage to the temporary flow collar (See Fig. 13). Both flow collars and magnehelic gage are included in the accessory start-up balancing kit.

6′

FURNACE

INLET HOOD

REAR

18″MIN

INSULATED DUCT CONNECTING

ERV

6′

EXHAUST HOOD

FRESH AIR & EXHAUST TO OUTSIDE

NOTE: Supply & exhaust ducts have

internal balancing dampers that must be adjusted.

18″

GROUND LEVEL

A00111

Fig. 7–Exhaust Ventilation

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If supply-air from outside is greater than exhaust-air from the house, an imbalance can result over pressurizing the home. If exhaust-air is greater than supply-air, combustion appliances may backdraft, bringing exhaust fumes into the house. A balanced condition will ensure optimum performance, provide satisfied customers, and avoid expensive callbacks.

Before proceeding with balancing, all windows, doors, and fireplace flues should be tightly closed. No exhaust system such as range top exhausts, dryer exhausts, fume hoods, bath or roof fans should be in operation. The forced-air furnace (if used for circulation) should be operating in continuous fan mode for normal operating speed.

I. BALANCING DAMPERS

Balancing dampers (sometimes called butterfly dampers) are located in the fresh air intake and the stale air exhaust (See Fig. 12) of the ERV.

II. FLOW COLLAR

Flow Collars are temporary, and should be installed as close to the ERV as possible and in straightest sections of duct to ensure accuracy (See Fig. 12). If only one flow collar is available, install collar in stale-air duct of the ERV, and record airflow. Next, install collar in the fresh-air duct and record airflow. If two flow collars are available, it will be much easier to read airflow and properly adjust dampers to balance unit.

With wall control at maximum speed (high-speed operation) and furnace or fan coil on continuous fan, connect hoses to flow collar to a magnehelic gage (See Fig. 13). When balancing the ERV make sure all doors and windows are closed. All exhaust fans, cooking ranges, and driers are turned off and the furnace or fan coil blower is on. The gate must be leveled and zeroed before use to read accurately. If needle falls below zero, reverse hose connections.

YELLOW

AIR EXCHANGE

% RELATIVE HUM. EXT. TEMP.

60% 55% 45%

21°C+ / 70°F 10°C / 50°F 0°C / 32°F

YR GB

Fig. 8–Typical Wall Control

OFF LOW

INTERMITTENT

RED

GREEN

BLACK

A00112

CONTROL

CONNECTOR

BLACK

GREEN

RED

YELLOW

OLOCIYRGB

A98384

Fig. 9–Control Connector

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Page 7

Measure exhaust air first. It is typically the lowest pressure due to nature of system and ductwork. Next measure fresh air. If fresh air reading is higher than exhaust reading, adjust damper until reading is same. If reading is lower, return to exhaust damper and adjust to obtain same reading. The label on flow collar can be used to convert static pressure into airflow.

Once ERV is balanced and dampers are adjusted to equalize airflow, use tape or drive screw to prevent damper blades from moving. Remove flow collars and secure ducts. This procedure should be repeated to ensure unit is balanced properly.

NOTE: The flow collar directional arrow (on flow collar) must be oriented in the airflow direction of the unit.

NOTE: Some field modification may be required to ensure proper temporary installation of flow collar during balancing when insulated flexible duct is used.

NOTE: For airflow pattern, see Fig. 14.

CAUTION: UNIT DAMAGE HAZARD

Failure to follow this caution may result in reduced unit efficiency, capacity or unit life. Do NOT use ERV during construction of a house or when sanding drywall. This type of dust may damage system.

VENTILATION EVALUATION

When ventilation requirement is determined, use Product Data Digests to reference unit airflow delivery and performance. The ventilation capacity of an ERV unit while at maximum speed is defined according to greatest total airflow required. These methods are derived from the Canadian National Building Code 1990 version and the CSA F326.1 revision.

The following 2 methods can be used to evaluate the approximate ventilation needs of a house. Accuracy of calculations are dependent upon the information available and knowing critical measurements of the structure (See Fig. 15).

METHOD 1

To calculate approximate ventilation or extend defrost for cold climate conditions:

The sum of rooms X 10 CFM per room, plus 20 CFM for a master bedroom or basement are required.

Example: 11 rooms X 10 CFM + 2 X 20 CFM = 150 CFM. NOTE: The master bedroom and basement are not included in

first part of this equation, but figured in at second part of the equation.

METHOD 2

To calculate approximate ventilation:

Referencing same example (See Fig. 15).

BLK BLK

WHT WHT

GND 115V FIELDSUPPLIED FUSED DISCONNECT

NOTE: Connect Y-terminal as shown for proper operation.

→

MODE HUMIDITY LEVEL BOARD FUNCTION FAN SPEED INDICATOR LED’S

Off Any Off/Intermittent Off OFF

Low Below Setpoint Exchange High High Both ON

Intermittent Below Setpoint Exchange High High Both ON

Below 23°F(-5°C) Any Defrost/Exchange High/Low Both ON

FOUR WIRE

TWO-WIRE

HEATING ONLY

GND FURNACE AUXILIARY J-BOX

Above Setpoint Exchange Low Low

Above Setpoint Off/Intermittent Off ON light on Exchange OFF

THERMOSTAT

TERMINALS

INDOOR UNIT 24V TERMINAL BLOCK

Fig. 10–Interlock Relay Wiring Layout

TABLE 1–WALL CONTROL

TWO WIRE

9-PIN AMP PLUG

INTERLOCK RELAY

120V FROM VENTILATOR

CONDENSING

UNIT

A05042

OUTSIDE TEMPERATURE PERCENT RELATIVE HUMIDITY

70°F and Above 21°C and above 60 percent

50°F 10°C 55 percent 32°F 0°C 45 percent

TABLE 2–MAXIMUM HUMIDITY LEVELS

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Page 8

Total cu ft. X 0.3 per hr = total. Take total and divide by 60 to get CFM.

Example:

1320 sq ft. x 8ft in height = 10560 cu ft house

10560 cu ft X 3 floors = 31680 total cu ft in house

31680 cu ft X 0.3 air change per fr = 9500 cu ft

9500 cu ft ÷ 60 minimum per hr = 160 CFM

Conclusion: The total amount of airflow needed is 160 CFM. This falls within airflow range of a ERVCCLHU1200 size unit.

CONTROL BOARD OPERATION

I. BOARD FUNCTION

To ensure proper operation of ERV, configuration jumpers are located on electronic control board and must match configuration setup shown on Fig. 16 under Jumper Table. Jumpers are factory set and do not require any changes unless control board is replaced. If control board is replaced, or unusual start-up operation is encountered, check jumpers to make sure they are located properly (See Fig. 16).

II. DEFROST

Defrost cycle is controlled by a thermistor which is located in the fresh-air intake passage (the thermistor unit is connected to J4 of control module (See Fig. 16). When defrost temperature sensor detects the need for defrost, K5 relay will close for 6 minutes while K1 and K2 remain energized.

This closes the outdoor air damper while running ERV blower on high-speed. This process recirculates warm indoor air through heat recovery core which melts any frost that has formed. Water created in this process is collected by ERV and drained away. Frequency of the defrost cycle depends on outdoor temperature (See Table 3).

III. OFF AND INTERMITTENT/OFF MODE

Whenever ERV is off, K1 relay is open (See Fig. 16).

IV. HIGH-SPEED AIR EXCHANGE

When high-speed air exchange occurs, K1 relay closes and K2 (12–vdc relay) is energized. This breaks low-speed contacts, and closes high-speed contacts. Then, 115vac is applied between orange and grey wires on Molex plug (pins 1 and 6) and motor runs in high-speed operation. Also, 115vac is applied across pins 5 and 7, this energizes interlock relay (See Fig. 16).

ELECTRONIC CONTROL BOARD

41 7

52 8

63 9

9 8 7

THE WIRES FROM THE SWITCH

YELLOW – INDICATOR, (J3-3)

BLACK – COMMON, (J3-4)

RED – SWITCH, (J3-5)

6 5 4 3

(OPTIONAL)

60 MINUTE TIMER

(OPTIONAL)

PUSH BUTTON SWITCHES

(5 SWITCHES MAXIMUM)

RED BLACK YELLOW

(OC)

BLACK – (J3-4)

COMMON

TERMINAL

STRIP

YELLOW – (J3-3)

INDICATOR TERMINAL STRIP

RED – (J3-5)

SWITCH TERMINAL STRIP

BACK OF PUSH BUTTON SWITCH

Fig. 11–Push Button Timer Layout

—8—

(I)

(OL)

A98386

Page 9

TABLE 3–DEFROST CYCLE

OUTSIDE TEMPERA-

TURE °F

Above 23°F No Defrost No Defrost

23°Fto5°F

4°F to -17°F

Below -18°F

STANDARD DE-

FROST (AS SHIPPED)

6 Minute Defrost/60

Minute Exchange

6 Minute Defrost/32

Minute Exchange

6 Minute Defrost/20

Minute Exchange

EXTENDED DE-

FROST (JUMPER

JU1-F REMOVED)

10 Minute Defrost/30

Minute Exchange

10 Minute Defrost/20

Minute Exchange

10 Minute Defrost/15

Minute Exchange

V. LOW-SPEED AIR EXCHANGE

When low-speed air exchange occurs, K1 relay closes and K2 (12–vdc relay) is de-energized. This keeps low-speed relay contacts closed and high-speed contacts open. Then, 115vac is applied between red and gray wires on Molex plug (pins 1 and 4) and the motor runs in low-speed operation. Also, 115vac is applied across ins 5 and 7, energizing interlock relay (See Fig. 16).

CARE AND MAINTENANCE

WARNING: ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system. There may be more than 1 disconnect switch.

CAUTION: CUT HAZARD

Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.

TEMPORARY

FLOW COLLAR

STALE AIR

TO OUTSIDE

FRESH AIR SUPPLY

TO BUILDING

→

MAX

BALANCING

DAMPER

Fig. 12–Balancing ERVBBLHU

MAX

MIN

AIRFLOW DIRECTION

FLOW COLLAR

FRESH AIR

FROM OUTSIDE

STALE AIR RETURN

FROM BUILDING

A05043

MIN

ZEROING SCREW

Fig. 13–Magnehelic Gage

—9—

CONVERSION

CHART

A98400

Page 10

STALE AIR

TO OUTSIDE

FRESH AIR FROM OUTSIDE

FRESH AIR

TO BUILDING

Fig. 14–Airflow During Exchange

I. DOOR

ERV door can be removed by unlatching brief case style latches, then lifting door up and sliding it sideways (See Fig. 17). Door must be in place and secured shut for proper operation.

II. FILTER

Filters in ERV are washable and should be cleaned every 3 months. Use a vacuum cleaner to remove heaviest portion of accumulated dust, then wash in lukewarm water. Allow filter to completely dry before re-installing. A dirty air filter will cause excessive strain on the blower motor. Never operate unit without a filter (See Fig. 17).

In addition, regularly check and clean screens on exterior intake and exhaust hoods when necessary.

CAUTION: UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in unit component damage. DO NOT clean filters in a dishwasher and DO NOT dry them with a heating appliance or permanent damage will result.

III. BLOWER MOTOR AND WHEEL

ERV blower motors are factory lubricated for life. Lubricating bearings is not recommended. However, inspect and clean any accumulated dirt and grease from blower motor and wheel annually.

IV. CLEANING CORE

ERV is equipped with a special energy recovery core which is made out of paper and allows transfer of sensible and latent energy. The core should always be vacuumed only every 3 months to remove dust and dirt that could prevent transfer of energy (See Fig. 17).

NOTE: The core should only be serviced when outdoor temperature is between 60°F and 75°F and it is dry.

CAUTION: DO NOT use water to clean core or damage will result. In addition, before servicing or removing the core inspect the edges to see if they appear soft (or slightly expanded). This can be normal and due to moisture in the air. DO NOT handle or service core until it is dry or air passages can become damaged and/or closed.

STALE AIR FROM BUILDING

A99269

TROUBLESHOOTING

WARNING: ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch.

CAUTION: CUT HAZARD

Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.

NOTE: Reference Table 3 Troubleshooting Chart

This can be a quick guide in resolving unit problems. It is also recommended to review and understand Wall Control Board Operation and Care and Maintenance sections before continuing. There are three main parts to focus on when troubleshooting ERV unit:

1. Wall Control

2. Electronic control board

3. Blower motor

I. WALL CONTROL

Use Table 1 to determine if wall control is operating correctly. Use Fig. 9 to check control wire connections.

NOTE: The electronic control board and wall control operate on 12vdc.

II. CONTROL BOARD

Electronic control board must have wall control attached before unit will function properly. Also, configuration jumpers located on control board must match configuration setup shown on Fig. 16 under Jumper Table. In addition, outside air thermistor must be connected to control board for it to operate properly. See Table 4, Temperature —vs— Ohm Chart, for valid temperature range.

III. BLOWER MOTOR

The ERV blower motor operates on 115vac, with 2–speed operation.

The easiest way to check blower speed operation is to use the wall control and initiate a low-speed blower and high-speed blower operation using intermittent mode (See Table 1, standard control operation).

NOTE: If, after making the following test, you still hear relays clicking upon charge, carefully check wiring, blower capacitor and blowers.

Alternate procedure to check blower speed:

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Page 11

MASTER

BEDROOM

WASH-

ROOM

WASH-

ROOM

BEDROOM

LIVING ROOM

WASH-

ROOM

LAUNDARY

ROOM

KITCHEN

BEDROOM

1320 sq ft (125 sq m) 1320 sq ft (125 sq m)

Fig. 15–Floor Plan Example

Blower Speed Test:

HIGH SPEED

1. Disconnect ERV from 115vac.

2. Unplug wall control wires at control module terminal block inside ERV.

3. Plug ERV back to 115vac.

4. Attach a wire across J3–8 and J3–9 (B and G) on control module terminal block.

5. Push in door switch. This will initiate a high-speed exchange.

LOW SPEED

1. Disconnect ERV from 115vac.

2. Unplug wall control wires at control module terminal block inside ERV.

3. Plug ERV back to 115vac.

4. Attach a 3.9 K Ohm resistor between J3–8 and J3–9 (B and G) on control module terminal block.

5. Push in door switch. This will initiate a low-speed exchange.

IV. BLOWER SPEED SELECTION

Three-speed blowers are factory connected to electronic control board on HIGH and LOW speed taps of blowers. Installer can easily change low-speed tap to medium-speed tap so electronic control will select between high and medium speed. Connections can be changed at motor location (See Tables 5 and 6).

To change low speed to medium speed, proceed as follows:

1. Unplug unit 115vac.

2. Remove filters and core from ERV.

3. Locate and remove wing nut on left side of unit.

4. Slide blower assembly to the right until wire connections are visible.

5. Locate red wire and blue wire coming from blower assembly.

6. Unplug red wire from quick connect.

7. Unplug protecting cap quick connection from blue wire and put on red wire coming from blower. The cap is a safety insulator.

BASEMENT

1320 sq ft (125 sq m)

DINING ROOM

FAMILY ROOM

#10

#11

8. Connect red wire of main harness to blue wire.

9. Replace wires, blower assembly, filters and core.

a. OUTDOOR AIR THERMISTOR

When unit is not responding to wall control, check outdoor air thermistor.

1. Remove thermistor wire from control board.

2. Take ohm reading across thermistor.

3. Refer to Table 4 for temperature/ohm relationship.

→

OPERATING THE ERV WITH THE EVOLUTION CONTROL

The ERV may be controlled using the Evolution system control. The ERV may be connected using either a NIM or a 4-Zone Damper Module. See the appropriate instructions if using the NIM or 4-Zone Damper Module for connection instructions.

Blower interlock relay is not needed for use with the Evolution system control. The Evolution system control will simultaneously control the ERV and the indoor blower.

Push Button Timers may be used and are connected to the ERV as shown in Figure 11. However, the Evolution system should be set to continuous fan to ensure that the fresh air is circulated in the home. In a Zoned System, at least one zone should be set to continuous fan.

How does the ERV operate with the Evolution control?

The ventilator has four settings in heating mode and three settings in cooling mode.

Heating:

AUTO - the ventilator selects the speed based on indoor humidity and outdoor temp. It may cycle on/off every 30 minutes depending on humidity and outside temp. LOW - low speed all of the time. HIGH - high speed all of the time. DEHUM - will only turn on if humidity is 3% over the setpoint. The speed is determined by indoor humidity and outdoor temp.

Cooling:

A98388

—11—

Page 12

NEUTRAL

LOW

120VAC

J1 2

FAN

MOTOR

HIGH

DOOR

MED

(NOTE 5)

SWITCH

INTERLOCK

1001111

0010110

J1 1

FAN

MOTOR

MED

(NOTE 5)

LOW

HIGH

J1 4

J1 6

RELAY

J1 3

J1 8

MOTOR

DAMPER

J1 9

MOTOR

DAMPER

CONTROL BOARD

RELAY

FUNCTION TABLE

MODE

0111110

Intermittent

Exchange Low

Exchange High

Circulation low

Circulation high

Defrost Cycle

LETTER

TABLE

AAAAA

FUNCTION

MODEL

ERVBBSVU1150

JU1G

ABCDEFG

JUMPER TABLE

JU1A JU1B JU1C JU1D JU1E JU1F

OUT

JU1

Off

0 = Relay coil is de-energized

1 = Relay coil is energized

ERVBBSVU1200

ERVBBLVU1150

INININ

OUT

NS = Not supported

ERVBBLVU1200

OUT

ERVBBLVU1330

OUT

NOTES

A05068

AND ERVBBLVU1330.

2 - FAN MOTOR 2 IS USED ONLY WITH ERVBBLHU1250, ERVBBLVU1200,

ERVBBLVU1330.

3 - DAMPER MOTOR 2 IS USED ONLY WITH ERVBBLVU1200 AND

1 - THREE CONTROLS AVAILABLE. SEE THE INSTALLATION MANUAL

(LOW VOLTAGE ONLY 12 VDC).

LOW. MEDIUM SPEED CAN BE SELECTED INSTEAD OF LOW SPEED.

DISCONNECT RED WIRE FROM MOTOR(S) RED TAP AND CONNECT TO

4 - IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE

MOTOR(S) BLUE TAP.

REPLACED, USE THE SAME OR EQUIVALENT WIRE.

5 - FACTORY SET WIRING FOR BLOWER SPEED SELECTION IS HIGH AND

OPTIONAL

NOTE 1

CONNECTION DIAGRAM LOGIC DIAGRAM

-t

DEFROST

TEMPERATURE SENSOR

MOTOR

CAPACITOR

NEUTRAL

HIGH

MEDIUM

FAN MOTOR 2 (NOTE 3)

BLBNGY

OVERRIDE LED (YELLOW) OVERRIDE SWITCH (BLACK) OVERRIDE SWITCH (RED)

WALL CONTROL (YELLOW) WALL CONTROL (RED) WALL CONTROL (GREEN)

WALL CONTROL (BLACK)

1 2

LOW

ABCDEFG

JU1

BLACK

GREY

ORANGE

BKBLGYOG

RED

VIOLET

WHITE

YELLOW

RVWYBN

LINE VOLTAGE

LOW VOLTAGE

AND FIELD WIRE

GREEN

BROWN

NO CONNECTION

OPTIONAL

Fig. 16—Wiring Diagram for Model ERV

24 VAC TO

INDOOR

(OPTIONAL)

TO J1 PIN 7

TO J1 PIN 5

3 2 1

(NOTE 4)

DAMPER MOTOR 2

EQUIPMENT

INTERLOCK RELAY KIT

NEUTRAL

COM

120VAC 60HZ

NEMA-15P

LINE

DOOR INTERLOCK SWITCH

COLOR CODE

DAMPER MOTOR 1

MOTOR

CAPACITOR

FAN MOTOR 1

3 4 5 6 7 8 9

NEUTRAL

HIGH

MEDIUM

LOW

POWER CONTROL BOARD

—12—

Page 13

DOOR IS

DETACHABLE

ENERGY RECOVERY

CORE CAN BE REMOVED

BY PULLING STRAIGHT OUT

FILTERS ARE

REMOVABLE BY

PULLING STRAIGHT

OUT

BRIEF CASE

TYPE LATCH

A99300

Fig. 17–Energy Recovery Ventilator

TABLE 4–TROUBLESHOOTING CHART

SYMPTOMS CAUSES SOLUTIONS

Continous ex-

Air too humid

Unit not responding to wall control

Unit stops momentarily

Air from distribution register too cold

Unit makes annoying noise

Noise level too high at distribution registers when in high speed

hange mode used in small house

Is in defrost

Broken control wire

Electrical supply interrupted

Improper calibration of air flow

Ventilation wheel out of adjustment

Air duct system too short

Use Intermittent Mode Check humidity level settings

Wait until defrost has terminated, maximum of 40 minutes

Test wall control, check connections, check thermistor

Check units circuit breaker

Check calibration of flow rates

Remove the motor and screw wheel on properly

Install a duct silencer

—13—

Page 14

TABLE 5–TEMPERATURE/OHM RELATIONSHIP

TEMP F° OHMS

30 34,480 32 32,680 34 30,760 36 29,220 38 27,470 40 26,020 42 24,680 44 23,320 46 22,070 48 20,910 50 19,830 52 18,820 54 17,870 56 16,920 58 16,160 60 15,260 62 14,530 64 13,790 66 13,090 68 12,480 70 11,860 72 11,270 74 10,750 76 10,250 78 9,750 80 9,300 82 8,840 84 8,432 86 8,042 88 7,668 90 7,310 92 6,993 94 6,661 96 6,368

98 6,085 100 5,811 102 5,571 104 5,313 106 5,088 108 4,869 110 4,660 112 4,450 114 4,268 116 4,019 118 3,918 120 3,750

TABLE 6–FACTORY SET BLOWER CONNECTION HIGH

OR LOW SPEED

CONTROL MODULE

J1-6 Orange Orange High

No Connection No Connection Blue + Cap Medium

J1-4 Red Red Low

MAIN ELECTRICAL

HARNESS CABLE

BLOWER WIRE SPEED

—14—

TABLE 7–MODIFY BLOWER CONNECTION HIGH OR

MEDIUM SPEED

CONTROL

MODULE

J1-6 Orange Orange High J1-4 Red Blue Medium

No Connection No Connection Red + Cap Low

MAIN ELECTRI-

CAL HARNESS

CABLE

BLOWER

WIRE

SPEED

Page 15

—15—

Page 16

—16—

Printed in U.S.A. erv643 Catalog No. II ERV-64–3