Tradewinds RNC15 Installation Instructions Manual

* The preview only show first 10 pages of manuals. Please download to view the full documents.

Loading preview... Please wait.

Manuals information


Report / DMCA this file

Description

Heat recovery ventilator

Manuals Content

MODELS RNC15/RNC25 TM

HEAT RECOVERY VENTILATOR INSTALLATION INSTRUCTION FOR HEAT RECOVERY VENTILATOR (HRV) Shipping and Packing List

Application

Package 1 of 1 contains: 1 - Assembled ventilator 1 - Bag assembly containing: 2 - Drain spout assemblies (HRV units only) 4 - Hanging straps 1 - Installation manual

Heat Recovery Ventilators (HRV) are designed to provide fresh air while exhausting an equal amount of stale air. The HRV is equipped with an aluminum core. The device uses the stale air that is being exhausted to condition the fresh air as it is being brought in. General

Required Tools Installation Tools • • • • • • • •

tin snips assorted screw drivers electric drill hammer wire strippers knife caulking gun smoke pencil

• • • • • •

large zip ties fabric flexible duct - class II rated mastic tape alum. foil duct tape zip ties 1/2” I.D. drain hose

These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities who have jurisdiction before installation. Table of Contents Shipping and Packaging List .................................................1 Required Tools ......................................................................1 Application .............................................................................1 General..................................................................................1

Balancing Tools •



Pitot Tube Balancing Kit [Case, 8 ft. vinyl tubing, Pitot tube, magnehelic gauge (0 - 0.25”), and mounting plate] Pitot Tube with instructions and Digital Manometer (with resolution of 0 - 0.25” - must read to 1/100ths of an inch)

Optional Accessories • • • •

20 Minute Fan Timer Wall Mounted Dehumidistat Weather hood Kit Round Diffuser 4” (100mm) 5” (125mm) 6” (150mm) 8” (200mm) • Kitchen Grille - may be required by code for kitchen applications - contains removable grease filter

Engineering Data................................................................2-3 Clearances & Requirements..................................................4 Installation ..........................................................................4-7 Installation Diagrams .............................................................8 Electrical ...............................................................................9 Optional Controls.................................................................10 Operation.............................................................................11 Wiring Diagrams ..................................................................12 Interlocking HRV to Furnace ...............................................13 Air Flow Balancing..........................................................15-16 Troubleshooting...................................................................17 Maintenance .......................................................................18

* LEAVE FOR HOMEOWNER NOTE: Due to ongoing research and product development, specifications, ratings and dimensions are subject to change without notice.

TW-25 1206



Engineering Data - HRV

RNC15

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE The cross-flow heat recovery core transfers heat between the two air streams. It is easily removed for cleaning or service. MOTORS AND BLOWERS Each air stream has one centrifugal blower driven by a common PSC motor. FILTERS Washable air filters in exhaust and supply air streams. MOUNTING THE HRV Four threaded inserts at corners of case designed to accept four PVC reinforced polyester straps that are supplied with the unit. DEFROST Damper defrost system; defrosts automatically as the outdoor temperature falls. CASE Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent exterior condensation. Drain connections two - 1/2" (12mm) OD. WEIGHT 87 lbs. (39.5 kg) SHIPPING WEIGHT 89 lbs. (40.5 kg) CONTROLS HRV System Control HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of HRV. Standard LOW SPEED SETTING can be increased by manipulating switches in electrical box. OFF(Standby)/LOW or OFF/HIGH speed operation also available by manipulating switches. OPTIONAL ACCESSORIES 99-132 20 Minute Fan Timer - (3 wire) 20 gauge wire (min.) 100’ length (max.) 99-186

Weather Hoods, 2 - 6" (150mm) c/w 1/4" (6mm) screen

99-116

Dehumidistat Ventilation Control - Dehumidistat with ON/OFF

99-130

Dehumidistat Control - Dehumidistat

Performance Net supply air flow in cfm (L/s) against external static pressure

E.S.P

RNC15

(external static pressure)

[cfm (L/s)]

@ 0.1" (25 Pa) @ 0.2" (50 Pa) @ 0.3" (75 Pa) @ 0.4" (100 Pa) @ 0.5" (125 Pa)

177 (83) 164 (77) 156 (73) 143 (67) 123 (58)

Max.Sensible Effectiveness

78%

-13°F (-25°C) outdoor air 72°F (22°C) 40% RH indoor air

Test Parameters

67cfm (32L/s)

Sensible Effectiveness 32°F (0°C)

76%

*Sensible Efficiency 32°F (0°C)

66%

*Sensible Efficiency -13°F (-25°C)

60%

**Latent Efficiency 95°F (35°C) Total Efficiency 95°F (35°C)

0% 20%

VAC @ 60HZ

120

WATTS / [email protected]” W.C.

173

WATTS / Low @.3” W.C.

63

*Sensible Efficiency - thermal **Latent Efficiency - moisture Note: Effectiveness - based on temp. differential between the 2 airstreams Efficiency - includes parasitic losses from fan and defrosting

All units conform to CSA and UL standards.

Dimensions RNC15 inches (mm) BLOWERS

STALE AIR FROM INSIDE

26.5" (673)

FRESH AIR FROM OUTSIDE

DAMPER

*NOTE: Front clearance of 25 inches (635 mm) is recommended for servicing unit.

DEFROST PORT

CONDENSATE DRAINS

23.5" (597)

STALE AIR TO OUTSIDE

FRESH AIR TO INSIDE

*All Duct Connections 6" (150mm)

FRONT VIEW

TOP VIEW

22.5" (572)

SIDE VIEW

Warranty Two year parts.

TM

Fifteen year aluminum core. HEAT RECOVERY VENTILATOR

2

TW-03 0204

Engineering Data - HRV

RNC25

THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE The cross-flow heat recovery core transfers heat between the two air streams. It is easily removed for cleaning or service. MOTORS AND BLOWERS Each air stream has one centrifugal blower driven by a common PSC motor. FILTERS Washable air filters in exhaust and supply air streams. MOUNTING THE HRV Four threaded inserts at corners of case designed to accept four PVC reinforced polyester straps that are supplied with the unit. DEFROST Damper defrost system; defrosts automatically as the outdoor temperature falls. CASE Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated to prevent exterior condensation. Drain connections two - 1/2" (12mm) OD. WEIGHT 63 lbs. (28.7 kg) SHIPPING WEIGHT 67 lbs. (30.4 kg) CONTROLS HRV System Control HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of HRV. Standard LOW SPEED SETTING can be increased by manipulating switches in electrical box. OFF(Standby)/LOW or OFF/HIGH speed operation also available by manipulating switches. OPTIONAL ACCESSORIES 99-132 20 Minute Fan Timer - (3 wire) 20 gauge wire (min.) 100’ length (max.) 99-186

Weather Hoods, 2 - 6" (150mm) c/w 1/4" (6mm) screen

99-116

Dehumidistat Ventilation Control - Dehumidistat with ON/OFF

99-130

Dehumidistat Control - Dehumidistat

Performance Net supply air flow in cfm (L/s) against external static pressure

E.S.P

RNC25

(external static pressure)

[cfm (L/s)]

@ 0.1" (25 Pa) @ 0.2" (50 Pa) @ 0.3" (75 Pa) @ 0.4" (100 Pa) @ 0.5" (125 Pa)

214 (101) 206 (97) 193 (91) 184 (87) 170 (80)

Max.Sensible Effectiveness

69%

-13°F (-25°C) outdoor air 72°F (22°C) 40% RH indoor air

Test Parameters

127cfm (60L/s)

Sensible Effectiveness 32°F (0°C)

67%

*Sensible Efficiency 32°F (0°C)

60%

*Sensible Efficiency -13°F (-25°C)

59%

**Latent Efficiency 95°F (35°C) Total Efficiency 95°F (35°C)

0% 20%

VAC @ 60HZ

120

WATTS / [email protected]” W.C.

182

WATTS / Low @.3” W.C.

70

*Sensible Efficiency - thermal **Latent Efficiency - moisture Note: Effectiveness - based on temp. differential between the 2 airstreams Efficiency - includes parasitic losses from fan and defrosting

All units conform to CSA and UL standards.

Dimensions RNC25 inches (mm) BLOWERS

STALE AIR FROM INSIDE

26.5" (673)

FRESH AIR FROM OUTSIDE

DAMPER

*NOTE: Front clearance of 25 inches (635 mm) is recommended for servicing unit.

DEFROST PORT

CONDENSATE DRAINS

23.5" (597)

STALE AIR TO OUTSIDE

FRESH AIR TO INSIDE

*All Duct Connections 6" (150mm)

FRONT VIEW

TOP VIEW

22.5" (572)

SIDE VIEW

Warranty Two year parts.

TM

Fifteen year aluminum core. HEAT RECOVERY VENTILATOR

3

0204

Clearances and Requirements Connecting Appliances to the HRV The following appliances should not be connected to the HRV:

WARNING Before installation, careful consideration must be given to how this system will operate if connected to any other piece of mechanical equipment, i.e. a forced air furnace or air handler, operating at a higher static. After installation, the compatibility of the two pieces of equipment must be confirmed, by measuring the air flows of the ventilator, by using the balancing procedure found in this manual.

• clothes dryer • range top • stovetop fan • central vacuum system

CAUTION Lint, dust or grease will collect in the HRV damaging the unit.

It is always important to assess how the operation of any HRV may interact with vented combustion equipment (i.e. Gas Furnaces, Oil Furnaces, Wood Stoves, etc.)

NOTE: Connecting any of these to the HRV will invalidate your warranty.

NEVER install a ventilator in a situation where its normal operation, lack of operation or partial failure may result in the backdrafting or improper functioning of vented combustion equipment!

Installation The HRV unit must be installed in a horizontal position as shown in the illustration below. The unit should be suspended using the provided hanging straps. If necessary, the unit may be installed on a platform: however, the cabinet should be isolated from the platform to prevent vibration transmission. The unit must be level. Sufficient clearance at the front of the access door is required for servicing the air filters and core. A minimum of 25" (635mm) clearance is recommended so the door can be opened. Four PVC reinforced polyester hanging straps are provided for hanging the HRV from the basement floor joists.

WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer or service agency.

WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

Suspending the Unit The hanging straps should be attached to the unit at the top end corners (mounting screws are already located on the HRV case). Securely fasten the other end of the straps to the floor joists with wide head nails (not supplied), making sure the UNIT IS LEVEL. The straps are designed to reduce the possibility of noise, resonance or harmonics; therefore using the full length of the strap between the HRV and the floor joists is recommended.

Location Selection The HRV must be located in a heated space where it will be possible to conveniently service the unit. Typically the HRV would be located in the mechanical room or an area close to the outside wall where the weather hoods will be mounted. If a basement area is not convenient or does not exist, a utility or laundry room may be used.

Weatherhood Location and Installation Weatherhood kit includes two fixed-cover hoods with a 1/4” (6mm) mesh screen. Exhaust Weatherhood Requirements • At least 6' (2 m) from the ventilation air intake*

Attic installations are not normally recommended due to: A) the complexity of work to install

• At least 18" (457mm) above ground or above the depth of expected snow accumulation*

B) freezing conditions in the attic C) difficulty of access for service and cleaning 4

Weatherhood Installation

CAUTION

SCREEN (sideview)

Unit must be installed level to ensure proper condensate drainage. Due to the broad range of installation and operational conditions, consideration must be given for the possibility of condensation forming on the unit or connecting ducting. Objects below the installation may be exposed to condensate.

COLLARISSUPPLIEDTO ENSUREVAPOURBARRIER IS100%SEALEDTO WALLPLATE

12"galvanized pipesupplied

• At least 3' (1 m) away from the corner of the building* 1/4"(6mm)SCREEN (frontview)

• At least 3’ away from gas meter, electric meter or a walkway where fog or ice could create a hazard*

EXTERIOR WALL

1. ThermalCollarslidesovergalvanized sleeveofWeatherhood. 2. FastenThermalCollartoBelt. 3. SlidetheInsulatedFlexibleDuctingover theWeatherhood'sgalvanizedsleeveand fastenittotheThermalCollar. 4. Hoodishingedtoallowforeasyaccess  forcleaningofbirdscreen.

• Not into a garage, workshop or other unheated space When installing the weatherhood, its outside perimeter must be sealed with exterior caulking. * Local code may require greater distances. Intake Weatherhood Requirements • Should be located upstream (if there are prevailing winds) from the exhaust outlet • At least 6' (2 m) from the exhaust weatherhood * • At least 6' (2 m) away from dryer vents and air handler exhaust (medium or high efficiency furnaces)* • A minimum of at least 6' (2 m) from driveways, oil fill pipes, gas meters, or garbage containers, swimming pools* • At least 18" (457mm) above the ground, or above the depth of expected snow accumulation* • At least 3' (1 m) from the inside/outside corner of the building* • Do not locate in a garage, attic or crawl space * Local code may require greater distances.

Weatherhood Clearances

OUTSIDE CORNER

36" (1m) recommended min.

36" (1m) recommended min.

INSIDE CORNER

CAUTION Weatherhood arrangement - requires a minimum of 6' (2m) separation and a minimum of 18" (460mm) clearance above the higher of the grade or anticipated snow level.

6' (2m) recommended min. EXHAUST

INTAKE

18" (460mm) min.

18" (460mm) min.

5

Air Duct Design and Installation A well designed and installed ducting system will allow the HRV to operate at its maximum efficiency.

WARNING Include a short length of fabric, flex duct or other non-metallic connector in the “Fresh Air to Building” hard ducted line in order to keep the HRV separately grounded (electrically) from the air handler. This will avoid a possible shock hazard to service people if a short to ground develops in one of the devices.

Always try to keep duct runs as short and straight as possible. See Installation Diagrams for various installation options. The inner and outer liners of the flexible insulated duct must be clamped to the sleeve of the weather hoods (as close to the outside as possible) and the appropriate port on the HRV. It is very important that the fresh air intake line be given special attention to make sure it is well sealed. A good bead of high quality caulking (preferably

Grilles that diffuse the air comfortably such as the Round Diffuser are recommended. If the floor is the only option available, then special care should be taken in locating grilles. Areas such as under baseboard heaters will help to temper the air. Also optional inline duct heaters are available for mounting in the supply duct work to add heat if required.

silicone sealant) will seal the inner flexible duct to both the HRV port and the weather hood prior to clamping with a large zip tie. To minimize air flow restriction, the flexible insulated duct that connects the two outside weather hoods to the HRV should be stretched tightly and be as short as possible.

Direct Connection to Air Handler Duct System Should you wish to hard duct the fresh air from the HRV directly into the cold air return of the air handler, remember to check the air flow balance of the HRV with the air handler fan both "ON" and "OFF" to determine that it does not imbalance the unit more than 10%.

Twisting or folding the duct will severely restrict air flow. See below for the recommended connection of flexible insulated ducts to the the outside weather hoods and the HRV. Installing the Ducting Between the HRV & Living Areas in the House To maximize airflow in the duct system, all ducts should be kept short and have as few bends or elbows as possible. Forty-five degree elbows are preferred to 90° elbows. Use “Y” tees instead of 90° elbows whenever possible.

Indirect Connection to Air Handler Duct System If permitted by local codes, an indirect connection may be made between the HRV fresh air duct and the air handler return plenum. The fresh air from the unit may be directed at a grille installed in the cold air return duct of the air handler. The fresh air outlet from the HRV should be no closer than 4 inches (100mm) and no more than 12 inches (300mm) from the grille.

All duct joints must be fastened with screws, rivets or duct sealant and wrapped with mastic or a quality duct tape to prevent leakage. Mastic is preferred but if duct tape is used, we recommend aluminum foil duct tape. Galvanized ducting from the HRV to the living areas in the house is recommended whenever possible, although flexible duct can be used in moderation if necessary.

FRESH AIR FROM HRV

To avoid possible noise transfer through the duct system, a short length (approximately 12 inches or 300mm) of nonmetallic flexible insulated duct should be connected between the HRV and the supply/exhaust duct system.

4" MINIMUM 12" MAXIMUM

V HR

The main supply and return lines to/from the HRV must be 6 inches (150mm) minimum. Branch lines to the individual rooms may be as small as 4 inches (100mm), but 5 inch (125mm) lines are preferred . All ducts running through attics and unheated spaces must be sealed and insulated to code. Fresh Air Ducting In applications that do not include an air handler, fresh air should be supplied to all bedrooms and living areas, excluding bathrooms, kitchen and utility areas. Grilles should be located high on a wall or in ceiling locations. 6

RETURN AIR DUCT FOR AIR HANDLER

Stale Air Exhaust System The stale air exhaust system draws air from the points in the house where the worst air quality problems occur. Stale air ducts should be installed in the bathroom, kitchen, and laundry room. Applications such as greenhouses, atriums, swimming pools, saunas, etc. have unique ventilation requirements which should be addressed with an isolated ventilation system. Also, the air handler return duct may be used to exhaust from. In this method, the exhaust air is not ducted back to the HRV with "dedicated lines" from bathrooms, kitchens, etc. Instead, the exhaust air is drawn out of the cold air return of the air handler. The air handler blower must be running when the unit is operating for this system to be effective.

Drain Connection (HRV Only) During a defrost cycle, the HRV may produce some condensation. This water should flow into a nearby drain, or be taken away by a condensate pump.

CAUTION The HRV and all condensate lines must be installed in a space where the temperature is maintained above the freezing point or freeze protection must be provided. The HRV cabinet has prepunched holes for the drain (see below). Insert the drain spout through the hole in the drain pan. Do not forget the “O ring” which seals each spout to the pan. REMEMBER TO HAND TIGHTEN ONLY the washer and lock nut which hold the drain spout in place.

CAUTION

Construct a P-Trap using the plastic tee connector. Cut two lengths of hose and connect each piece to an end of the “T” fitting, then connect the other ends to the two drain spouts. Position the "T" fitting to point upward, andconnect the drain line. Tape or fasten base to avoid any kinks. This creates a “trap” which will hold some condensate and prevent odors from being drawn up the hose and into the fresh air supply of the HRV.

Balancing Dampers and Grilles Balancing dampers and/or adjustable grilles should be used to balance the flow rates into and out of various rooms. Grilles or diffusers should be positioned high on the wall or in the ceiling. Kitchen exhaust grilles must never be connected to a range hood. They should be installed at least 4 feet (1.2m) horizontally away from the stove. A hinged 6”X10” (150 X 250mm) rectangular kitchen exhaust grille is available as part number. This grille includes a removable grease filter. Canadian building codes require that kitchen grilles be equipped with washable filters.

"P" Trap (HRV only) DRAIN HOSE PLUMBING PRE-PUNCHED HOLES (2)

DRAIN PAN

DRAIN PAN

DRAIN SPOUT

Field-supplied balancing dampers should be installed external to the unit to balance the amount of stale air being exhausted with the amount of fresh air being brought into the house. Refer to Air flow Balancing section.

DRAIN SPOUT

ZIP TIE

TEE CONNECTOR

1/2 " I.D. DRAIN HOSE

TO DRAIN

HARD PIPE PLUMBING

Kitchen Grille

PRE-PUNCHED HOLES (2)

REMOVABLE FILTER

DRAIN PAN

DRAIN SPOUT

The Round Diffuser is available in 4" (100mm) 5” (125mm) 6" (150mm) 8" (200mm)

1/2" HARD PIPE

TEE JOINT

Round Diffusers

DRAIN SPOUT TO DRAIN

Note: Secondary drain pan may be required to protect from condensate leakage. 7



DRAIN PAN

Installation Diagrams

HRV

DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN EXHAUST AIR from various parts of home. (i.e. bathrooms, kitchens)

Return Air

3’ min. recommended

Outdoors

Cool Air Return

Forced Air Furnace

NOTES: 1. Furnace blower is required to operate when HRV is ON to provide good air distribution. 2. No separation requirements necessary between direct connection point and furnace. 3. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required. 18" (460 mm) above grade minimum. 4. Due to the differences in pressure between the HRV and the epuipment it is being connected to, the HRV's airflow must be confirmed on site, using the balancing procedure found in this manual.

*Unit is normally balanced on HIGH speed with furnace blower ON.

DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN Return Air EXHAUST AIR from various parts of home. (i.e. bathrooms, kitchens)

Balancing damper* 3’ min. recommended

Outdoors

Balancing damper*

Cool Air Return

*Unit is normally balanced on HIGH speed with furnace blower ON.

NOTES: 1. Furnace blower is required to operate when ventilation from HRV is require. The furnace should be set to run continuously. 2. A minimum separation of 40 inches (1 m) is required between the two direct connections. 3. The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air. 4. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required. 18" (460 mm) above grade minimum. 5. Due to the differences in pressure between the HRV and the epuipment it is being connected to, the HRV's airflow must be confirmed on site, using the balancing procedure found in this manual.

8

Forced Air Furnace

Electrical

The HRV unit should be plugged into a standard designated (120VAC) electrical outlet with a ground. The outlet should be serviced by a separate 15 amp/120V circuit. An extension cord should not be used with this appliance. A qualified service technician should make any required electrical connections.

WARNING In order to prevent electric shock when cleaning or servicing the HRV, it is extremely important to confirm the polarity of the power line that is switched by the safety (disconnect) switch. The hot line (black) is the proper line to be switched. To confirm the proper polarity, use a voltmeter or test lamp to ensure there is no power after the switch when the door is open. Check between that point and ground (on the cabinet). Always make sure that the HRV is properly grounded.

Remote Control Connections Low voltage connections between the remote controls, the dehumidistat, or the fan timer should be made by a qualified service technician. Low voltage wires from the remote controls are connected to the HRV micro-processor board.

9

Optional Controls

Optional Remote Control Devices Low Voltage

DEHUMIDISTAT VENTILATION CONTROL (D.V.C.) AT DEHUMIDIST

* remove jumper on circuit board when using this control ** requires 3 wires • Designed for a central location • Ventilation control turns HRV system ON and OFF • Dehumidistat increases ventilation when required • High speed override switch • Great for building code requirements • Low voltage • Connect one per HRV only • Connects to red, black and orange Part No. 99-116

REMOTE DEHUMIDISTAT *requires 2 wires • anywhere humidity is a concern • provides high speed ventilation when ..humidity level exceeds selected setting • Connects to red and black Part No. 99-130 White

20 MINUTE TIMER *requires 3 wires • provides high speed for 20 minutes • maximum wire length 100’ • connect up to 4 • connects to red, black and green terminals Part No. 99-132

10

Operation For most installations the HRV will normally be set to operate continuously on low speed. To suit various lifestyles, the HRV offers a selection of operating modes.

Self Test The ventilator will automatically initiate a self test sequence when power is applied. Fan motor is cycled and then damper motor is cycled. Duration: Approximately 1.5 mins.

Method of Operation Good -

intermittent operation at all times

How much ventilation do I need?

Better-

During seasons when your windows and doors are closed (winter and summer if air conditioned) the HRV should operate continuously when the dwelling is occupied, and either continuously or intermittently when not occupied.

continuous operation during day or occupied conditions, intermittent at night or unoccupied

Best -

recommended continuous operation of both HRV and furnace/air handler blower

Mode DIP Switch Settings

Figure 1 - Factory DIP Switch Settings

Figure 2-DIP Switch Settings for Standby (When using a Remote Control Device that has an ON/OFF Switch)

The factory setting of the DIP switches (located on the circuit board) provides continuous low speed ventilation. Optional Remote Controls will initiate high speed ventilation.

This DIP Switch Setting can be adjusted when using a system control that has an ON/OFF switch (refer to "Remote Control Devices" in this manual). "STANDBY" is achieved when the Remote Control Switch is in the "OFF" position. The Dehumidistat and Timers will initiate high speed ventilation regardless of the "ON/OFF" switch position when this DIP switch configuration is used.

Remote controls with an ON/OFF switch (refer to "Remote Control Devices" in this manual) will shut the entire system down when the remote control is in the OFF position. Changing the remote control from OFF to STANDBY can be achieved by Setting the DIP Switch as per Figure 2.

ON

Figure 2 Figure 1

ON

HS REMOTE

HS

DFR2

REMOTE

DFR3

DFR2 DFR3

ATTENTION Figure 2 may not meet building code conformance in certain geographical areas. Check with your local building authority. Increasing Low Speed to Medium Low The ventilator automatically operates on its lowest speed when plugged in or switched on. This setting is factory supplied from an autotransformer with two selectable low speeds. To switch to a continuous medium low speed, an installing contractor must interchange the red and blue wires from the autotransformer inside the electrical box. Whether or not this change is made, the HRV will only be able to access a single selected low speed. High speed is available with the use of optional remote controls connected to the appropriate terminals inside the electrical box.

11

Wiring Diagrams

RNC3WIRINGDIAGRAM LEGEND

HIGHVOLTAGE 12VLOWVOLTAGE AUTO TRANSFORMER

120V POWER SUPPLY

RED

BLACK

BLUE

WHITE WHITE

FANMOTORDETAILS

INTERFACE RELAYCONTACTS

BLACK

FIELDINSTALLED 12VLOWVOLTAGE

TO MOTOR

BLACK

T6

T9

GREEN

GREEN

AUTOTRANS ORANGE

YELLOW

CAPACITOR

T2

ITE WH D RE

T3

T4

T5 T6 SPARE

NEUTRAL

T8

T7 LINE

T9

FAN O/P

N/C COMMON N/O

T10

T11

T12

8

K4

T1 C4 SEE DEFROST DETAIL

C5

GROUND

P1 VDR2 DIRECTMOUNTEDCAPACITOR

VDR3 K1

ModelRNC5(Only)

PCBPLUG-IN 1

3/4AMPFUSE

DEFROSTDETAILS

BLACK

ORANGE

ORANGE RED

BLACK DEHUMIDISTAT

-

+ C1

2

BI-DIRECTIONAL DAMPERMOTOR

3

GREEN LEDDRIVE RECIRCULATE

CR1

4

BLUE P3 THERMISTOR

LOWFAN

ON

12VAC P4

PIN1-RED PIN2-ORANGE PIN3-BLACK PIN4-SPARE

RED +12V ORANGE OBCS

VDR1

P1

BLACK

K3 FACTORY INSTALLED JUMPER

PLUGIN CONNECTOR

RED

K2

GREEN GROUND

HS REMOTE DFR2 DFR3

RED

NONFUNCTIONAL FUTURE USE TERMINALS

COMMS

1 P5

P2 DEHUMIDISTAT

SW1

PCBPLUG-IN 1

2 P1

PLUGIN CONNECTOR

BI-DIRECTIONAL DAMPERMOTOR

BLACK

BLACK

ORANGE

ORANGE

RED

RED

3

4

INTERNAL DEHUMIDISTAT (IFAPPLICABLE)

PIN1-BLACK PIN2-ORANGE PIN3-RED PIN4-SPARE

WALLMOUNTEDDEHUMIDISTAT

20MINUTEFANTIMER

DVC *Removefactoryinstalled jumperoncircuitboard

BlacktoBlack(Dehumidistat) distat Dehumi to Relative Setting ns Conditio Outside

: WINTER at idist Setdehum to40%. 30%  between stoodry, . Ifhomei tting higherse id, adjustto hum stoo Ifhomei tting. lowerse adjustto

TAT

DEHUMIDIS

RedtoRed(12V)

RedtoRed(12V) BlacktoBlack(Dehumidistat) BlacktoBlack(Dehumidistat)

RedtoRed(12V) GreentoGreen(LEDDrive)

OrangetoOrange(OBCS)

: SUMMER at idist Setdehum toOFF.

98-RNC3-001INSHRV 0104

12

Interlocking HRV Operation to an Airhandler/Furnace Blower

When using the Interface relay contacts to initiate blower operation on a furnace, certain thermostats will initiate the outdoor cooling condenser when R and G are closed. Use this wiring configuration to prevent the Interface relay contacts from initializing the condenser unit. This problem can occur at the thermostat because the Y terminal is connected to the G terminal internal to the stat. When R and G are closed at the furnace (by dehumidistat or relay) 24 Volts is sent to G at thermostat. 24 Volts is then sent through Y which will initiate outdoor condenser.

13

Dehumidistat Operation (HRV only) The optional HRV remote controls include a dehumidistat which controls humidity levels during the heating season. The control has a selector knob with set points ranging from 20% to 80% relative humidity (RH). Most people are comfortable when indoor relative humidity levels are in a range from 30 to 45%.

The dehumidistat switches the ventilator to high speed when the moisture level in the building exceeds the desired setpoint. The dehumidistat switches the HRV back to low speed ventilation when the humidity has been reduced below the setpoint. The dehumdistat should only be used during the heating season. It must be set to OFF position throughout the rest of the year.

Defrost Operation Damper Defrost The damper defrost HRV has an electronically controlled damper defrost mechanism. The defrost timer is activated when the outside temperature drops below 27°F (-3°C). A motor driven damper door mechanism closes off the supply air from ouside allowing the exhaust air to recirculate through the unit. After the defrost period, the damper operates in the opposite direction to reopen the fresh air port. Defrost cycle repeats until the temperature again rises above 27°F (-3°C).

CAUTION Lengthening the run time may result in ice buildup on the core.

Defrost Cycle DIP Switch Settings Defrost DIP Switch Settings (located on the circuit board) can be adjusted to increase the unit’s run (ventilation) time. The three minute defrost time cannot change. Factory Setting 3 minute defrost time 17 minute run time

Option 1* 3 minute defrost time 25 minute run time

ON

Option 2* 3 minute defrost time 30 minute run time

ON

ON

HS

HS

HS

REMOTE

REMOTE

REMOTE

DFR2

DFR2

DFR2

DFR3

OFF

SW1

DFR3

ON

SW1

OFF

DFR3

ON

SW1

*Lengthening the run time may result in ice build-up on the core.

14

Air Flow Balancing

The first step is to operate all mechanical systems on high speed, which have an influence on the ventilation system, i.e. the HRV itself and the air handler, if applicable. This will provide the maximum pressure that the HRV will need to overcome, and allow for a more accurate balance of the unit. 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 digital 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 end of the Pitot is connected to the high pressure side of the gauge. The tube coming out of the branch 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 air flow. 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 air flow (highest reading on the gauge). Then damper that air flow back to match the lower reading from the other duct. The flow should now be balanced. Actual air flow can be determined from the gauge reading. The value read on the gauge is called the 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 in either feet per minute or meters per second. To determine the actual air flow, the velocity is multiplied by the cross sectional area of the duct being measured. This is an example for determining the air flow in a 6" duct. The Pitot tube reading was 0.025 inches of water. From the chart, this is 640 feet per minute. The 6" duct has a cross sectional area of = [3.14 x (6"÷12)2]÷4 = 0.2 square feet The air flow 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:

It is necessary to have balanced air flow in an HRV. The volume of air brought in from the outside must equal the volume of air exhausted by the unit. If the air flow is not properly balanced, then: • The HRV may not operate at its maximum efficiency • A negative or positive air pressure may occur in the house • The unit may not defrost properly • Failure to balance HRV properly may void warranty

CAUTION Ensure balanced air flow in HRV. Excessive positive pressure may drive moist indoor air into the external walls of the building where it may condense (in cold weather) and degrade structural components. May also cause key holes to freeze up.

Excessive negative pressure may have several undesirable effects. In some geographic locations, soil gases such as methane and radon gas may be drawn into the home through basement/ground contact areas.

WARNING Ensure balanced air flow in HRV/ERV. Excessive negative pressure may also cause the backdrafting of vented combustion equipment. Read the Application Warning in Clearances & Requirements section of this manual! Prior to balancing, ensure that: 1. All sealing of the duct 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. Air flow in branch lines to specific areas of the house should be adjusted first prior to balancing the unit. A smoke pencil used at the grilles is a good indicator of each branch line's relative air flow. 6. 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. 7. Return unit to appropriate fan speed for normal operation

DUCT DIAM. (inches) 5 6 7

0.14 0.20 0.27

The accuracy of the air flow reading will be affected by how close to any elbows or bends the readings are taken. Accuracy can be increased by taking an average of multiple readings as outlined in the literature supplied with the Pitot tube.

8. A field-supplied balancing damper for the stale air side is required for system balancing. Balancing Procedure The following is a method of field balancing an HRV using a Pitot tube, which is advantageous in situations when flow stations are not installed in the duct system. Procedure should be performed with the HRV on high speed. 15

CROSS SECTION AREA (sq. ft.)

Pitot Tube and Gauge Pitot Tube Air Flow Balancing Kit

DUCT

with magnehelic gauge, Pitot tube, hose and carry case.

AIR FLOW Pitot tube Magnehelic gauge High Pressure Side IC

EL MAGNEH

Low Pressure Side

Placement of Pitot Tube HRV NOTE: Graphic is for illustrative purposes only. Duct connection ports may vary.

Place pitot tube a minimum of 18" from blower or elbows

Outdoors

Note: Duct connections may vary, depending on model.

Pitot tube

MAGNEHELIC

Field-supplied Balancing Damper (optional)

Magnehelic gauge

Balancing Damper

Pitot tube

Magnehelic gauge MAGNEHELIC

NOTE: Apply use of balancing dampers as required.

16

Troubleshooting Symptom

Cause

Solution

Poor Air Flow

• • • • • • • • •

• clean exterior hoods or vents • remove and clean filter • remove and clean core • check and open grilles • open and adjust dampers • have electrician check supply voltage at house • check duct installation • increase the speed of the HRV • have contractor balance HRV

Supply air feels cold

• poor location of supply grilles, the air flow may irritate the occupant

1/4” (6mm) mesh on the outside hoods is plugged filters plugged core obstructed house grilles closed or blocked dampers are closed if installed poor power supply at site duct is restricting HRV improper speed control setting HRV air flow improperly balanced

• outdoor temperature extremely cold

• locate the grilles high on the walls or under the baseboards, install ceiling mounted diffuser or grilles so as not to directly spill the supply air on the occupant (eg. over a sofa) • turn down the HRV supply speed. A small duct heater (1kw) could be used to temper the supply air • placement of furniture or closed doors is restricting themovement of air in the home • if supply air is ducted into air handler return, the air handler fan may need to run continuously to distribute ventilation air comfortably

Dehumidistat is not Operating

• improper connection to ventilator • external low voltage is shortened out by a staple or nail • check dehumidistat setting it may be on OFF

• check that the correct terminals have been used • check external wiring for a short • set the dehumidistat at the desired setting

Humidity Levels are too High in Winter Condensation is appearing on the windows

• dehumidistat is set too high .• lifestyle of the occupants

• set dehumidistat lower • avoid hanging clothes to dry, storing wood and venting clothes dryer inside. Heating wood may have to be moved outside • vent crawl space and place a vapor barrier on the floor of the crawl space • ducts from the washroom/bathroom should be sized to remove moist air as effectively as possible, use of a washroom/bathroom fan for short periods will remove additional moisture • timer or fan can be added to washroom/bathroom exhaust • on humid days, as the seasons change, some condensation may appear but the home’s air quality will remain high with some HRV use • increase speed of the HRV

• moisture coming into the home from an unvented or unheated crawl space • moisture is remaining in the washroom/bathroom and kitchen areas

• condensation seems to form in the spring and fall

• HRV is set at too low a speed Humidity Levels are too Low

• • • •

dehumidistat control set too low blower speed of HRV is too high lifestyle of occupants HRV air flow may be improperly balanced

HRV and / or Ducts Frosting up • HRV air flow is improperly balanced • malfunction of the HRV defrost system

• set dehumidistat higher • decrease HRV blower speed • humidity may have to be added through the use of humidifiers • have a contractor balance HRV air flow • Note: minimal frost build-up is expected on cores before unit initiates defrost cycle functions • have HVAC contractor balance the HRV • ensure working properly.

Condensation or Ice Build Up in Insulated Duct to the Outside

• incomplete vapor barrier around insulated duct • a hole or tear in outer duct covering

• tape and seal all joints • tape any holes or tears made in the outer duct covering • ensure that the vapor barrier is completely sealed

Water in the bottom of the HRV

• • • • •

• ensure O-Ring on drain nozzle sits properly • look for kinks in line • check water drain connections • make sure water drains properly from pan

drain pans plugged improper connection of HRV drain lines HRV is not level drain lines are obstructed HRV heat exchange core is not properly installed 17



Maintenance

HRV

1. Inspect Exterior Hoods at least once a month. Make sure exhaust and fresh air supply hoods are not blocked or restricted by leaves, grass, or snow. In winter, it is especially important to make sure snow is not blocking the hoods or that frost has not built up on the wire mesh (bird screen).

6. Clean Duct System if Required The duct system running to and from the HRV may accumulate dirt. Wipe and vacuum the duct once every year. You may wish to contact a Heating/Ventilation company to do this.

WARNING: Blockage of hoods may cause an imbalance.

Wipe down the inside of the cabinet with a damp cloth to remove dirt, bugs and debris that may be present.

7. General Maintenance - Twice a Year

2. Clean Air Filters - Twice a Year The standard filters equipped with your HRV are removable and washable. a) simply open access door and slide core out

8. Cleaning the Fans Fans may accumulate dirt causing an imbalance and/or excessive vibration of the HRV. A reduction in the air flow may also occur. In new construction this may result within the first year due to heavy dust and may occur periodically after that over time depending on the outdoor conditions.

b) remove filter clips c) once clips are removed filters can be taken off the core to be rinsed with water or a combination of mild soap and water. Do not clean in the dishwasher d) to re-assemble, place clean filter(s) (wet or dry) back into their positions against the core and return clips to their original position



unplug the HRV and open the service door



remove the core



remove ducting (metal and/or flexible insulated type) from the red and/or blue ports which are connected immediately inline with the fan assembly



use a small brush, such as a toothbrush or pipe cleaner, and insert first

e) slide core back into its original position 3. 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 slide out of the channel

(a) through the large opening of the fan assembly and then

c) once removed from the cabinet remove filters

(b) through the smaller opening in the end of the fan assembly

d) wash core in warm soapy water (do not use dishwasher)



scrub individual fan blades until clean. Avoid moving or damaging balancing flat weight, clip is usually found on one or more of the fan blades

Note: Core installation label on the outer end of the core.



vacuum and wipe

To install the clean core:



reassemble making sure ducting is reattached firmly and insulation and moisture barrier are sealed and taped

e) install the clean filters f)

install clean core

a) first mount the bottom flange of the core guide into the bottom H channel approximately 1/4” (6mm)

Before attempting this task, thought should be given to having a qualified service technician complete the service work.

b) mount the left or right side flange of the core guide approximately 1/4” (6mm) followed by the other side c) mount the top flange of the core guide into the top H channel approximately 1/4” (6mm) d) with all four corners in place and the core straight and even, push hard in the center of the core until the core stops on the back of the cabinet NOTE: Core will appear to stick out from cabinet approximately 1/8” (3mm). This is designed this way so that the access door will fit tight against the core. 4. Motors - Maintenance Free 5. Drain (condensate) Line - Clean Once a Year Inspect drain line, drain spout and “P” trap for blockage, mold or kinks. Flush with warm soapy water and replace if worn, bent or unable to clean. 18

Similar documents