enerboss 400c series vertical fan coil - clear...

July 5/2011

Enerboss 400C Series Vertical Fan Coil

Specifications, Installation, Operation and Maintenance Manual

July 5/2011

1 INSTALLATION .................................................................................... 3

Locating the Fan Coil ......................................................................................... 3 1.1

Framing ............................................................................................................... 3 1.2

Electrical Power Connection ............................................................................. 3 1.3

Control and Electrical Connections.................................................................. 4 1.4

Plumbing ............................................................................................................. 4 1.5

Ducting ................................................................................................................ 4 1.6

2 COMMISSIONING ................................................................................ 5 Supply Air Balancing ......................................................................................... 5 2.1

HRV Balancing ................................................................................................... 5 2.2

Water Side Commissioning ............................................................................... 8 2.3

3 OPERATING THE FAN COIL AND HRV/ERV ................................. 8

General Description ........................................................................................... 8 3.1

Thermostat .......................................................................................................... 9 3.2

Dehumidistat Control (Optional) ...................................................................... 9 3.3

24V Push Button Timers (Optional) ............................................................... 10 3.4

Recommended Seasonal Settings .................................................................... 11 3.5

4 MAINTENANCE .................................................................................. 12

Maintaining Return Filters and HRV/ERV Core ......................................... 12 4.1

5 WARRANTY .......................................................................................... 13

6 TECHNICAL INFORMATION ........................................................... 14 6.1 Nomenclature ..................................................................................................... 14

6.2 Coil Data ............................................................................................................ 15 6.3 4-pipe Heating coil data ..................................................................................... 16 6.4 Fan Curves.......................................................................................................... 17

6.5 Outside Air at Low Speed .................................................................................. 18

6.6 Exhaust Air ......................................................................................................... 18 6.7 HRV Efficiency .................................................................................................. 19 6.8 Sound Level Summary ....................................................................................... 19

6.9 Shop Drawings ................................................................................................... 19 6.10 Electrical ......................................................................................................... 25

6.11 Operational States ........................................................................................... 28

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1 INSTALLATION

Locating the Fan Coil 1.1

Clean the floor of debris where the fan coil is to be placed. With the fan coil tipped at the

top, feed the risers down to the unit below through the sleeves provided. Solder the

mating risers and insulate the remaining copper on the supply and return water risers.

Shim the fan coil plumb and level if necessary.

Framing 1.2

Using nominal 2” studs, frame around the fan coil rough-in flange on the left, right, top

and bottom as shown below.

Electrical Power Connection 1.3

Supply the fan coil with 120VAC terminating at the junction box provided inside the

unit. The table below outlines the breaker sizes needed.

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ELECTRICAL SPECIFICATIONS

Electrical Volts Watts MCA

No Electric Back up 120/1 400 15

1.5 kW Back up 120/1 1900 20

CONTROLS

POWER CONDUCTOR WIRES

THERMOSTAT 24 VAC 4 18 GA

DEHUMIDISTAT 24 VAC 2 18 GA

TIMERS 24 VAC 2 18 GA


SPRING WOUND MECHANICAL COUNT DOWN

20-80% MAKE ON RISE

DESCRIPTION

HEAT COOL WITH FAN SWITCH

MOMENTARY PUSH BUTTON WIN20

Control and Electrical Connections 1.4

Control wiring is 24 VAC. All controls terminate at a terminal strip inside the fan coil.

Thermostat connections (R,G,Y,W,C), High Ventilation Switch (Hum , 24V) and Dryer

interlock (Dryer SW), Push Button timers (24 V, Timer Sw, indicator).

Plumbing 1.5

The coils come c/w drain and air bleed plugs on the headers. When charging the coils,

open the air bleed plug (top, return header) and manually open the control valve.

Ducting 1.6

Supply Air 1.6.1

Supply air options are: 1) Front, non-ducted. 2) Rear ducted 6x8 or rear ducted 14x8. 3)

Top ducted, 8” dia.

Return Air 1.6.2

Return air options are front, back, left or right and are not typically ducted. A key

operated volume control return air damper supplied with the fan coil is necessary for

proper HRV balancing.

HRV Return Air (Exhaust Air from Building) 1.6.3

At the top, front, left of the fan coil a 5” diameter collar is provided. The HRV return air

collar can be specified when ordering to be top or side and can be changed in the field by

swapping the cover plate and collar plate.

HRV Exhaust Air (Exhaust Air to Outside) 1.6.4

At the top, rear, right of the fan coil a 5” diameter collar is provided. The exhaust air



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HRV Outside Air (Fresh Air from Outside) 1.6.5

At the top, right, front of the fan coil a 5” diameter collar is provided. The outside air



2 COMMISSIONING

Supply Air Balancing 2.1

The supply air motor is an ECM operating in constant cfm mode. Adding static will not

significantly reduce the total air flow as you would expect with a psc motor. On ducted

systems the amount of air at each grille can be regulated with dampers.

HRV Balancing 2.2

The HRV exhaust air can be adjusted in low and high speed using the control board and

the procedure that follows. The amount of outside air is adjusted using dampers. The

damper in the return air grille can be closed (partially) to increase outside air flow or

opened to decrease outside air flow. If outside air needs to be further reduced, a sliding

damper located in the HRV outside air compartment should be used.

When balancing the HRV:

-Close all windows, doors and

fireplace dampers.

-Turn off any exhaust systems

such as bathroom fans, range

hoods, central vacuums or

dryers.

There are three modes of

operation in which the HRV

needs to be balanced.

1) High speed (High ventilation

switch).

2) Low speed (thermostat fan

ON, no heat or cool calls).

3) Low ventilation with a call for heat or cooling.

Balancing Sequence:

High Speed Balancing – set supply and exhaust to the specified flows

Low speed balancing – Fan On. Reduce the higher flow to match the lower

Low speed with heat/cool call on – using the throttling damper, match the outside air

flow to that of the exhaust air.

Exhaust air

measuring

port

Fresh Air

measuring

port

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B

Balancing mode 1 2.1.1

High Speed Balancing:

With all dampers fully open and the exhaust fan speeds at

the factory setting, run the fan coil in high ventilation

mode. Using a hot wire anemometer or pitot tube and

micromanometer measure the air velocity (hot wire) or

velocity pressure (micromanometer) in the HRV return

and HRV outside air. The table below shows cfm values

for various meter readings.

2.3.1.1 Outside Air High Speed Adjustment

If the outside air flow is too low, gradually close

the return air grille damper (A) until the desired

OA flow is measured. If the outside air flow is too

high gradually close the outside air balancing

damper (B) until the OA flow is obtained.

Outside Air Return Air

Flow Velocity Pressure Velocity Pressure

CFM fpm inwc fpm inwc

30 238 0.0035 221 0.0030

40 317 0.0063 294 0.0054

50 397 0.0098 368 0.0084

60 476 0.0142 441 0.0122

70 556 0.0193 515 0.0166

80 635 0.0252 588 0.0216

90 714 0.0319 662 0.0274

100 794 0.0394 735 0.0338

110 873 0.0476 809 0.0409

120 952 0.0567 882 0.0487

Balancing

Ports

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2.3.1.2 Exhaust Air High Speed Adjustment

From the window in the HRV access door (C), locate the two blue

pots on the circuit board. The top pot adjusts the exhaust fan HIGH

speed. Turn clockwise to increase and counterclockwise to decrease

CFM. Adjust the exhaust flow rate to within 10% of the OA rate (step

2.2.1)

Balancing Mode 2 2.3.2

2.3.2.1 Low Speed Balancing

Measure and record the flow rate of the Outside Air with the fan coil

in low speed ventilation (fan On, thermostat system switch off) using

the same method described above. Note: No adjustment can be made

to this flow without affecting the high speed flow and repeating the

high speed balance.

Measure the exhaust air from building low speed flow.

Use the lower pot to adjust the exhaust fan LOW speed.

Turn clockwise to increase and counterclockwise to decrease CFM

Adjust until the flow matches that of the outside air.

Balancing Mode 3 2.3.3

2.3.3.1 Low Ventilation on a Call for

Heat

On a call for heat or cool the main fan motor

increases speed. To prevent over ventilating

during the call, a throttling damper (D) partially

closes the outside air opening. Several damper

stop points (E) are available on the throttling

damper assembly. 1) Measure the outside air

when the fan coil is in a call for heat and set the

stop to a more open position if more OA is

need for balance or a more closed position is

less OA is needed. 2) Adjust the OA flow

within 10% of the EA flow in low speed. The

exhaust air flow rate in a call for heat or

cooling should not change from that of low

ventilation mode.

A

C

D

E

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Water Side Commissioning 2.3

The coil(s) must be fully charged and free of air. To determine the water flow through

the coil and the output of the unit measure the entering and leaving water temperatures

and the entering and leaving air temperatures with the fan coil in a call for heat ( or

cooling as appropriate). The water flow rate and unit output can be calculated with the

equations given.

C409 gpm = 0.7*{temperature change air (F)}/{temperature change water (F)}




C409 Btu/hr = temperature change air (F) *350




3 OPERATING THE FAN COIL AND HRV/ERV

General Description 3.1

The Enerboss Integrated Fan Coil has two fans:

The main fan circulates air in the space and also brings in fresh air from outdoors. A

smaller fan serves to exhaust air from the space (HRV exhaust).

Understanding Your Heat/Energy Recovery Ventilator (HRV/ERV)

The heat (energy) exchange system in the Enerboss provides ventilation air at a

prescribed rate to maintain a healthy, comfortable indoor environment while reclaiming

energy from the exhausted stale air.

3.1.1 How It Works

The HRV exhausts air from rooms in the home that produce the most odors, humidity,

VOC’s and other pollutants. This air is exhausted to the outdoors through a heat/energy

recovery core. At the same time, fresh air from outdoors is drawn into the HRV core

where the energy from the outgoing stale air is transferred to the incoming fresh air. The

conditioned fresh air is then blended with the circulating air of the heating/cooling system

and distributed to the living areas of the home through the supply ductwork (or direct

supply grills).

The Enerboss integrated HRV/ERV is a 2-speed system:

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When the thermostat switch is in Fan ON mode the HRV/ERV runs continuously on low

speed, increasing to high speed on call from a timer or optional dehumidistat.

When the thermostat switch is in Fan AUTO mode the HRV/ERV is in standby and will

provide low volume ventilation only on a call for heat, or will provide high speed

ventilation on call from an optional dehumidistat or timer .

Thermostat 3.2

The thermostat should have as a minimum two switches:

A “system switch” controls the mode of operation (heat, cool or off), and a “fan switch”

controls fan operation (On or Auto).

System Switch 3.2.1

System OFF: System does not react to heating or cooling.

System COOL: System is in cooling mode, fan coil comes on when room temperature

rises above set point.

System HEAT: System is in heatign mode, fan coil comes on when room temperature

drops below set point.

Fan Switch 3.2.2

FAN AUTO (intermittent operation): The Enerboss will operate with a call for heating or

cooling or high ventilation from one of the remote controls. Fan operation will cease and

the unit will turn off once the call is satisfied. Low ventilation only occurs on a call for

heat or cool.

FAN ON (continuous): The Enerboss will constantly circulate air on low speed and

ventilate continuously in low volume. On a call for Heating or Cooling unit will go into

high speed cooling/heating and resume low speed after the thermostat is satisfied. On

call from a remote control the unit will go into high speed ventilation and resume low

speed after the remote is satisfied. This is the recommended setting for occupied spaces.

Dehumidistat Control (Optional) 3.3

Excessive ambient humidity can be controlled with an optional wall mounted

dehumidistat. The dehumidistat will initiate high speed ventilation when the humidity

sensor detects humidity in the air around it to be higher than the dehumidistat set point.

In hi-speed ventilation the small exhaust fan will run at high speed and the main fan will

operate at high speed. The Enerboss will cease high speed ventilation when the humidity

sensor detects lower humidity than set point.

Note: Dehumidistat settings do not need to be changed frequently; usually once

when the weather starts to get hot and humid (late spring, early summer), and again

when the weather starts to get cool and dry (late fall, early winter).

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Typical seasonal settings for the dehumidistat dial are as follows:

Summer: 80% or OFF

Winter: 40-60%

Dehumidistat Wiring:

Use 2-Conductor low voltage wire. Connect to 24 VAC and Humidity

Dehumidistat Settings and Responses 3.2.3

When Thermostat Fan Switch is ON

If indoor humidity is below dehumidistat set point the HRV runs in low speed. The HRV

fan and the main fan will operate in low.

If the indoor humidity rises above the dehumidistat set point the HRV runs in high speed.

The HRV fan and the main blower will operate in high until switch is disengaged.

When Thermostat Fan Setting - AUTO

If the indoor humidity is below the dehumidistat set point the main fan and HRV will be

off.

If the indoor humidity is above the dehumidistat set point the HRV runs in high speed.

The HRV fan and the main blower will operate in high speed.

24V Push Button Timers (Optional) 3.4

Twenty minute timers (Part # WIN-20) may be located in bathrooms, kitchen or laundry

room for timed source control of humidity and odor. Engaging the timer sends the

ventilation system to high speed for twenty minutes to evacuate odor, excess humidity or

other indoor pollutants. Longer timed cycles can be obtained with mechanical timers.

Wiring

20 minute timers connect to: 24 VAC; Timer Switch and LED Indicator.

Mechanical timers connect to: 24 VAC and Humidity.

Timer Settings and Responses 3.2.4

Thermostat Fan Setting - ON

The HRV fan and the main fan will operate in low. When the timer is ON the fan coil

will be in high ventilation mode. The HRV fan and the main blower will operate in high

until the switch is disengaged.

Thermostat Fan Setting - AUTO

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The HRV will be off. Both fans will be off except on call for heat or cooling. When the

timer is turned ON the fan coil will be in high ventilation mode. The HRV fan and the

main blower will operate in high until the switch is disengaged.

Recommended Seasonal Settings 3.5

Hot, Humid Seasons: 3.2.5

Dehumidistat: 80% or OFF

Thermostat: COOL, Fan Switch ON (continuous)

High speed ventilation will rarely (dehumidistat at 80%) or never (dehumidistat at OFF)

take place. The main blower will usually operate in low speed, circulating cool air

throughout the home and introducing low levels of fresh air and expelling exhaust air

through the ventilation system. The main blower will go into high speed with a call from

the thermostat for cooling. Continuous ventilation is recommended for optimal air

quality.

Additional adjustment: If high ventilation takes place too often, switch dehumidistat to

OFF.

Cool, Cold Seasons: 3.2.6

Dehumidistat: 40-60%

Thermostat: HEAT, Fan Switch ON (continuous)

High speed ventilation will take place when the dehumidistat set point is exceeded. After

the dehumidistat is satisfied, the main blower will return to low, circulating warm air

throughout the home, while exchanging a small amount of fresh air and exhausting an

equal amount of stale air through the ventilation system. The main blower will go into

high speed with a call from the thermostat for heating, but ventilation rates will remain

low. Continuous ventilation is recommended for optimal air quality.

Adjusting the Dehumidistat setting: If high speed ventilation takes place too often, raise

the humidity setting on your dehumidistat in 5% steps. If condensation forms on the

windows, the dehumidistat setting should be lowered. The dehumidistat should always

be set higher (15%) than a humidifier if one is installed.

NOTES:

Continuous operation (Fan ON) is recommended when the suite is occupied.

Constant air circulation results in even temperature throughout the suite, from floor to

ceiling, from room to room.

Improved indoor air quality (IAQ): Constant circulation means constant ventilation.

The ECM motor in the unit uses less than 30 watts in circulation mode and is ~ 74%

more efficient than the commonly used PSC motor.

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4 MAINTENANCE

Maintaining Return Filters and HRV/ERV Core 4.1

Regular maintenance of your filters and core will

ensure their effective operation and longevity.

The Return Air Filter 4.1.1

The return air filter (located against the coil in the

lower section of the fan coil) is a disposable filter that

should be checked every three months and replaced

as needed (typically 6 or 12 months). This filter can

be replaced with any standard 10x20x1” filter of the

same efficiency (MERV 4-6). To access the return air

filter:

1) Remove the outer finish panel by pulling toward

you from the bottom.

2) Remove the lower cover by lifting and tilting the

top outward.

3) Place the new filter in the filter brackets on the coil

plate with the wire mesh toward the coil.

The HRV/ERV Filters 4.1.2

Remove the finished panels (bottom and top) and

inner covers (2).

Slide the HRV filters along their guides toward you

and remove.

Vacuum the HRV filters and replace them (as

needed).

Repeat every 90 days.

The HRV Core (polypropylene media) 4.1.3

Remove the finish and access panels as described previously

Slide the HRV core toward you along its guides.

Vacuum or wash the core. If washing the core, let dry before replacing.

Repeat every 6 to 12 months.

The ERV Core (polymer media) 4.1.4

Remove the energy exchange core as you would an HRV core.

Nu-Air polymer cores can be washed or vacuumed

Repeat every 6 to 12 months.

RA Filter

Rack

HRV

Filters (2)

Core

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5 WARRANTY

YOUR ENERBOSS

TRANSFERABLE WARRANTY

Should your Enerboss cease to function within two (2) years of the date of original

purchase due to defective material of workmanship of the product, NU-AIR Ventilation

Systems Inc. will supply a new or rebuilt part FOB factory to replace the defective part.

Delivery, installation, and labor cost would be your responsibility.

Lifetime Core Warranty

If the core in your NU-AIR Heat Recovery Ventilator fails due to a defect in material or

workmanship NU-AIR Ventilation Systems Inc. will supply a new core FOB factory to

replace the defective part. Delivery and labor costs are your responsibility. Should an

ERV core cease to function within five (5) years of the date of original purchase due to

defective material of workmanship of the product, NU-AIR Ventilation Systems Inc. will

supply a new or rebuilt part FOB factory to replace the defective part. Delivery,

installation, and labor cost would be your responsibility.

Warranty Limitations

The above warranty does not cover damage to the unit while in your possession (other

than damages caused by defective parts or material) due to the following: 1) improper

installation or unreasonable use of unit: 2) failure to provide reasonable and necessary

maintenance. If the unit is put to commercial use or application other than consumer use,

warranty is for a period of one (1) year. This warranty does not cover water heaters,

instantaneous water heaters, boilers, condenser units or central boiler or chiller systems

supplied or used with the Enerboss; where applicable, see manufacturer's warranty for

these devices.

Nu-Air Ventilation Systems Inc.

P.O. Box 2758

16 Nelson St., Windsor, NS

B0N 2T0

Tel: (902) 798-2261 Fax: (902)798- 2557

Email: [email protected]

Website: www.nu-airventilation.com

mailto:[email protected]

http://www.nu-airventilation.com/

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6 TECHNICAL INFORMATION

6.1 Nomenclature

Fan Coil Lower Assembly HRV Upper Assembly

C- V

ER

TIC

AL

(CO

NC

EA

LE

D)

Cooling Coil

Heating Coil

Hydronic Connections

Valve

Return Air

Supply Air

HRV Core

HRV Fan

Fre

sh

Air In

Exh

ast A

ir In

Exh

au

st A

ir Ou

t

C4 09 3/4 Ton

15 2- Pipe Electric back up

BK Back

0 None

F Front

A-Front

0 No H/ERV

0 none

0 none

0 none

0 none

12 1 Ton

20 2- Pipe

RR Right Rear

2 2-Way

B Back

B-Back

P Poly

1 105 cfm

T Top

T Top

T Top

18 1.5 Ton

40 4-pipe

RF Right Front

3 3-Way

L Left

C-Top

E Enthalpy

S Side

S Side

S Side

LR Left Rear

R Right

D-Front/Back

LF Left Front

E-Front/Top

B4 Back 4 pipe

F-Back/Top

R4 Right 4 pipe

G-Front/Back/Top

L4 Left 4 pipe

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6.2 Coil Data

DETAILED COIL DATA

COIL CONSTRUCTION - MODLE

409 MODEL

412 MODEL

418 MODLE 409 MODEL 412 MODEL 418

TYPE - WATER WATER WATER WATER WATER WATER

FIN HEIGHT X FINNED LENGTH UOM 20X10 20X10 20X10 20X10 20X10 20X10

FACE AREA SQ FT 1.39 1.39 1.39 1.39 1.39 1.39

FINS PER INCH ea 14 14 14 14 14 14

NOMINAL TON Ton 0.75 1 1.5 0.75 1 1.5

TUBE OD in 3/8 3/8 3/8 3/8 3/8 3/8

ROWS ea 3 3 4 3 3 4

AIR SIDE PERFORMANCE COOLING HEATING

FLOW cfm 350 450 500 350 350 350 450 450 450 500 500 500

CONTINUOUS LOW SPEED cfm 133 113 95 133 133 133 113 113 113 95 95 95

ENTERING AIR DRY BULB F 80 80 80 70 70 70 70 70 70 70 70 70

ENTERING AIR WET BULB F 67 67 67 60 60 60 60 60 60 60 60 60

LEAVING AIR DRY BULB F 56.1 56.2 54.1 162 145 111 161 145 111 171 152 115

LEAVING AIR WET BULB F 56 56 54.1

FACE VELOCITY fpm 252 324 360 252 252 252 324 324 324 360 360 360

LIQUID SIDE PERFORMANCE

ENTERING WATER TEMPERATURE F 45 45 45 180 160 120 180 160 120 180 160 120

LEAVING WATER TEMPERATURE F 57.8 57.4 55.6 141 128 103 143 130 103 150 135 103

NUMBER OF CIRCUITS ea 2 3 5 2 2 2 3 3 3 5 5 5

FLUID FLOW gpm 1.88 2.5 3.75 1.88 1.88 1.88 2.50 2.50 2.50 3.75 3.75 3.75

WATER PRESSURE DROP ft 10.47 6.42 5.59 8.52 8.71 9.26 5.29 5.42 5.71 4.74 4.83 5.06

TOTAL CAPACITY Btu/hr 12100 15500 19900 35,300

29,000

13,340

45,100

37,100

11,870

55,500

45,700

25,300

SENSIBLE CAPACITY Btu/hr 9200 11800 14300

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6.3 4-pipe Heating coil data

4-pipe fan coils use a single row coils in a common case with one of the cooling coils listed above. The heating performance of this coil is as

follows.

4-PIPE HEATING COIL DATA 20 degree delta 40 degree delta

COIL CONSTRUCTION MODLE 409 MODEL 412 MODEL 418 MODLE 409 MODEL 412 MODEL 418

TYPE WATER WATER WATER WATER WATER WATER

FIN HEIGHT X FINNED LENGTH 20X10 20X10 20X10 20X10 20X10 20X10

FACE AREA 1.39 1.39 1.39 1.39 1.39 1.39

FINS PER INCH 14 14 14 14 14 14

TUBE OD 3/8 3/8 3/8 3/8 3/8 3/8

ROWS 1 1 1 1 1 1

AIR SIDE PERFORMANCE HEATING HEATING

FLOW 350 350 350 450 450 450 500 500 500 350 350 350 450 450 450 500 500 500

ENTERING AIR DRY BULB 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70

ENTERING AIR WET BULB 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60

LEAVING AIR DRY BULB 137.5 122 90.9 130.9 116.8 88.6 128.1 114.6 87.7 122.7 106.7 90.4 117.2 102.6 88 114.9 101 87.1

FACE VELOCITY 252 252 252 324 324 324 360 360 360 252 252 252 324 324 324 360 360 360

LIQUID SIDE PERFORMANCE

ENTERING WATER TEMPERATURE 180 160 120 180 160 120 180 160 120 180 160 140 180 160 140 180 160 140

LEAVING WATER TEMPERATURE 160 140 100 160 140 100 160 140 100 140 120 100 140 120 100 140 120 100

NUMBER OF CIRCUITS 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

FLUID FLOW 2.67 2.042 0.813 3.10 2.36 0.93 3.285 2.511 0.98 1.043 0.722 0.4 1.20 0.83 0.45 1.27 0.871 0.478

WATER PRESSURE DROP 7.13 4.41 0.83 9.48 5.81 1.07 10.6 6.52 1.18 1.22 0.63 0.2 1.59 0.81 0.26 0.088 0.087 0.29

SENSIBLE CAPACITY 25939 19978 8046 30112 23125 9213 31940 24524 9715

20,271

14,119

7,853

23,337

16,141

8,891

24,676

17,026

9,384

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6.4 Fan Curves

The room fan coil is usually designed for free air delivery into a room but may be used

with minimal ducting having a static resistance of 0.25 inwc or less. The supply fan is

powered by an ECM operating in constant CFM mode. The delivered airflow remains

relatively constant over varying external static pressures

The supply fan also draws outside air through the HRV. The ratio of outside air and

return air is governed by the relative amounts of static pressure in the return air stream

and outside air stream. A dampered return air grille is supplied with each unit. Closing

this damper will create more return air static and result in more outside air.

CF

M

ESP (inwc)

SUPPLY FAN

C409

C412

C418

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6.5 Outside Air at Low Speed

The flow rate of outside air is a function of the main blower speed reduction from high

speed to circulation speed and to a lesser extent the duct system. The low speed outside

air flow cannot be adjusted without affecting the high speed flow rate. In most

applications the high speed ventilation rate is set during commissioning and the low

speed flow is left to float. You should expect low speed flow reductions of 40 – 60%.

6.6 Exhaust Air

Low speed range 40%-100% of high

CF

M

ESP (inwc)

HRV Exhaust Air

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6.7 HRV Efficiency

CORE OA TEMP OA FLOW EFFECTIVNESS

C F l/s cfm SENSIBLE LATENT

POLY

1.7 35 24 50 69 1.7 35 19 40 78 35.0 95 24 50 72 35.0 95 19 40 82

ENTHALPY

1.7 35 24 50 74 53 1.7 35 19 40 75 58 35.0 95 24 50 83 43 35.0 95 19 40 85 47

6.8 Sound Level Summary

Measured at 2.0 m from unit

SOUND LEVEL

MODEL LOW HIGH HEAT HIGH VENT

NC dBA NC dBA NC dBA

C409 27 34 42 34 47 33

C412 26 46 49 52 46 52

C418 26 50 48 52 47 54

6.9 Shop Drawings

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6.10 Electrical

No Electric Back up 120/1 400 15

1.5 kW Back up 120/1 1900 20

CONTROLS

POWER CONDUCTOR WIRES

THERMOSTAT 24 VAC 4 18 GA

DEHUMIDISTAT 24 VAC 2 18 GA



SPRING WOUND MECHANICAL COUNT DOWN

20-80% MAKE ON RISE

DESCRIPTION

HEAT COOL WITH FAN SWITCH

Momentary push button WIN-20

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6.11 Operational States

The table below defines the operating state of each device (motor, valve, etc) in the unit

for all available inputs. Priority increases from left to right in the tables.

400C Enerboss States

DEVICE

STATE

Blower Priority to high speed calls

Off Low Med High

A+!Y+!G G H

W+Th<100 Y+Th<70

W+Th>100

(min 1 - 15)*

W+Th>100

(min 16 - 30)*

W+Th>100

(min 31+)* Timing in ECM motor

HRV Priority to high speed calls->

Off Low High

A+!Y+!G G H

W any

Y

Defrost Damper

Off (closed to outside)ON (ventilate)Off (closed to outside)

No calls

G,Y,W D (min 1-4 ) Off 4 min On 36 min scan D and repeat if D=ON

H

Input Definition

A Fan Switch - AUTO

G Fan Low

H Range Hood interlock

H Bathroom Light

OA Throttling Damper Y Cool

Off (open) ON (throttled) W Heat

H W+Th>100+!H+!D Th Thermister (Degrees F)

G+!W+!Y Y+Th<70+!H+!D D Defrost Switch

No calls ₊ And

! Not

Water Control Valve - Cooling

Off ON

Y+Th>75 Y+Th<75

After 5 min of valve closure, if Y is still calling, repeat sequence above

Water Control Valve - Heating

Off ON Opens valve for 1 min. Thermister scans; if after 60 s, < 100F valve closes.

W+Th<100 W+Th>100 After 5 min of valve closure, if W is still calling, repeat sequence above

D&G on 1 min, off 39 min scan D and repeat if "on"

D!G

Notes: Th<40 end when Th>80F!W (temperatures in Fahrenheit)

* Y & W fan speeds are staged:-

Min 1 to 15 fan speed is at 44% of High

Min 16 to 30 fan speed is at 56% of High

Min 31 + fan speed is at 100%

Fan reverts to default low (Fan ON mode) or off (Fan AUTO mode) as soon as t-stat is satisfied.

HRV Fan Speed Set points

Low Speed High speed

Increase G+S3+S1 H+S3+S1 store to EEPROM when S3 clears

Decrease G+S3+S2 H+S3+S2 store to EEPROM when S3 clears

Opens valve for 1 min. Thermister scans; if after 60 s

>75F valve closes.

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400C Fan Coil

enerboss 400c series vertical fan coil - clear...

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