Greenheck Vari-Flow Air Management System User Manual

Document 476251

Vari-Flow Air Management System

®

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble,
install, operate or maintain the product described. Protect yourself and others by observing all safety
information. Failure to comply with instructions could result in personal injury and/or property damage!

Vari-Flow Air Management System

General Safety Information

Only qualified personnel should install this unit.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity are present. If more information is needed,
contact a licensed professional engineer before moving
forward.

1. Follow all local electrical and safety codes, as well as
the National Electrical Code (NEC), the National Fire
Protection Agency (NFPA), where applicable. Follow
the Canadian Electrical Code (CEC) in Canada.

2. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces, or chemicals.
Replace cord immediately if damaged.

3. Verify that the power source is compatible with the
equipment.

®

WARNING

Electrical shock hazard. Can cause equipment
damage, personal injury or death. Service must only
be performance by personal that are knowledgeable
in the operation of the equipment being controlled.

DANGER

Always disconnect power before working on or near a
unit. Lock and tag the disconnect switch or breaker to
prevent accidental power up.

CAUTION

When servicing the unit, variable frequency drives
may be hot enough to cause pain or injury. Allow
motor to cool before servicing.

CAUTION

It is the responsibility of the installer to make sure
both electrical and gas appliances shut down in
the event of a fire or in the event of a power loss to
the building when this sequence is required by the
authority having jurisdiction.

Vari-Flow Air Management System

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Table of Contents

Receiving and Handling

Receiving and Handling ........................2

Installation

Control Box Mounting ........................3

Resistive Temperature Detector ................3

Pneumatic Static Pressure Kit ...................4

Keypad Mounting .............................4

Touchscreen Mounting .........................5

Electrical Connections

Power for Vari-Flow Control ...................5

Power for Lights ............................5

Variable Frequency Drives (VFD) ................6

Vari-Green® Motor ..........................6

VFD Provided by Others ......................6

Make-Up Air VFD in Vari-Flow Wiring ............7

Make-Up Air VFD in Make-Up Air Wiring .........7

Auto Tempering .............................7

Fire System Microswitch ......................7

Resistive Temperature Detector(s) ..............8

Temperature Sensors ........................8

Keypad ...................................8

Touchscreen ...............................8

Remote Enable .............................8

Shunt Trip .................................9

Electric Gas Valve with Gas Reheat .............9

Spare Fire Relay Contacts ....................9

High Temperature Alarm Contacts ..............9

Airflow Proving .............................9

Wash Interface ..............................9

Vari-Flow Connection Checklist .................10

Sequence of Operation .......................11

System Optimization ..........................12

Controller Setup and Tutorial ................ 13-14

Menus
A.
B.
C.
D.

G.
H.

Keypad Navigation and Information ..............24

Touchscreen Navigation .................... 25-26

General Information .........................26

Settings ............................... 26-27

Configuration ..............................28

Information ...............................29

Troubleshooting .............................30

Maintenance Log .............................31

Our Commitment .............................32

On/Off Unit ........................15

Setpoint ..........................16

Clock/Scheduler ....................17

Input/Output .......................17

Service ........................18-21

Manufacturer ................... 21-23

Receiving

Upon receiving the product, check to make sure all
items are accounted for by referencing the bill of lading
to ensure all items were received. Notify the carrier if
any damage is noticed. The carrier will make notification
on the delivery receipt acknowledging any damage to
the product. All damage should be noted on all of the
copies of the bill of lading which is countersigned by the
delivering carrier. If damaged upon arrival, file a claim
with the carrier. Any physical damage to the unit after
acceptance is not the responsibility of the manufacturer.

Unpacking

Verify that all required parts and the correct quantity of
each item have been received. If any items are missing,
report shortages to your local representative to arrange
for obtaining missing parts.

Storage

If a kitchen fan control center must be stored prior to
installation, it must be protected from dirt and moisture.
Indoor storage is highly recommended. For outdoor
storage, cover the control package with a tarp to keep it
clean, dry, and protected from UV (ultraviolet) radiation
damage.

NOTE

Improper storage which results in damage to the unit
will void the warranty.

Handling

Make sure the equipment does not suffer any heavy
vibration or knocks.

Vari-Flow Air Management System

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Installation

Control Box Mounting

1. Locate an area with enough space to mount the
control box and fasten to the wall.

NOTE

Control Box may be factory mounted. If so, continue
to the next section.

NOTE

If the Vari-Flow system is equipped with static
pressure controls it will be located in the Vari-Flow
cabinet, therefore this control box should be mounted
in the space to be controlled. If the control box is
mounted outside of this space, please refer to the
Pneumatic Static Pressure Kit Installation Instructions.

4. Insert the compression seal into the hole from
the inside of the hood making sure the gasket is
placed on the fitting before inserting it into the hole.
Place the octagon box and J-box plate provided
over the fitting on the top of the hood, keeping the
fitting centered in the box. Install the lock washer
and 1-1/2inch nut on the threaded portion of the
compression seal and tighten securely.

1/4 inch Compression Seal

Gasket

J-Box Plate

Resistive Temperature Detector(s)
(RTD) Mounting

NOTE

Resistive temperature detector(s) may be factory
installed. If so, continue to the next section.

1. Locate flat area(s) at the top interior of the hood in
front of the filters, towards the front of the hood.

Exhaust Area

Sensor Install

Cut Out Area

Supply Area (optional)

Top View of Exhaust Hood

2. Cut a 3/4-inch diameter hole into the top of the
capture tank. Make sure the resistive temperature
detector(s) will not interfere with fire system nozzles
and is not within 12 inches of light fixtures.

Temperature
Sensor

Lock Washer

Nut

Octagon Cover

5. Insert the resistive temperature detector (RTD) into
compression seal and tighten to 35 ft-lbs.

6. Place octagon cover onto J-box plate and fasten it.

NOTE

All field installation and wiring of electrical equipment
must be done to meet NEC and local codes.

.75 to .875 inch
diameter hole

Hood
Surface

3. Center the octagon extension over the hole on the
hood surface.

Octagon
Extension

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Vari-Flow Air Management System

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Pneumatic Static Pressure Kit

- if equipped

NOTE

The Vari-Flow system may not be provided with the
static pressure controls, if not move onto the next
section.

1. Locate the Dwyer static pressure sensor outside of
the building in a secure location free from as many
obstructions as possible.

2. Refer to the instruction manual with the static
pressure sensor for installation and operation details.

3. Once the static pressure probe is mounted, run vinyl
tubing from the probe back to the control panel and
coil the excess tubing. Do not kink or trim the tubing.

4. If the control panel is located in the space to be
controlled, go to the next section. If the control panel
is mounted remotely from the space to be controlled,
continue to step 5.

5. Run 1/4 inch virgin poly tubing (by others) from the
sensor in the control panel to a secure location in the
space to be controlled.

Keypad Mounting

NOTE

The keypad may be factory mounted. If so, continue
to the Electrical Connections section.

1. For systems with remote controls or keypad, a 35,
75, or 150 foot RJ25 cable is supplied to connect
the keypad to the controls. The cable is plenum
rated and does not need to be run through conduit
unless required by local codes. If the keypad is to be
mounted further away than the cable that is received,
additional cable will be needed. Additional cable is
available at the lengths mentioned above.

Keypad Mounting Diagram

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Touch Screen Mounting - if equipped

Electrical Connections

NOTE

The touch screen may be factory mounted. If so,
continue to the Electrical Connections section.

1. For systems with remote controls or touch screen,
two 35, 75, or 150 foot sets of cables are supplied to
connect the touch screen to the controls. The cables
are plenum rated and do not need to be run through
conduit unless required by local codes. If the keypad
is to be mounted further away than the cable that is
received, additional cable will be needed. Additional
cables are available at the lengths mentioned above.

Touch Screen Mounting Diagram

NOTE

All wiring of electrical equipment must be done to
meet NEC and local codes.

Power for Vari-Flow Cabinet

• 115 VAC, power for controls (Terminals H and N)

CONTROL INPUT:

115 VAC, 15 AMPS FROM BREAKER

H

N

Power for Lights

• 115 VAC, power for hood lights, one per light circuit
(Terminals H1, N1 | H2, N2 | H3, N3 | H4, N4)

• 115 VAC, power to lights, one per light circuit
(Terminals B1, W1 | B2, W2 | B3, W3 | B4, W4)

EACH CANOPY LIGHTING CIRCUIT MUST NOT EXCEED 15A TOTAL CURRENT

LIGHT CIRCUIT 1: 115 VAC, 15 AMPS FROM BREAKER

R1

11

H1 W1B1

BK 14GA

H2 B2 N2W2

14

HOOD LIGHT

RELAY 1

LIGHT CIRCUIT 2: 115 VAC, 15 AMPS FROM BREAKER

R2

11

14

HOOD LIGHT

RELAY 2

HOOD LIGHT(S)

HOOD LIGHT(S)

WH 14GABK 14GA BK 14GA

WH 14GABK 14GA

G

N1

G

LIGHT CIRCUIT 3: 115 VAC, 15 AMPS FROM BREAKER

R3

11

BK 14GA BK 14GA

H3 B3 N3W3

BK 14GA BK 14GA

H4 B4 N4W4

14

HOOD LIGHT

RELAY 3

LIGHT CIRCUIT 4: 115 VAC, 15 AMPS FROM BREAKER

R4

11

14

HOOD LIGHT

RELAY 4

HOOD LIGHT(S)

HOOD LIGHT(S)

WH 14GA

WH 14GA

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Vari-Flow Air Management System

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Variable Frequency Drives (VFD) - if equipped

NOTE

If electrically commutated motors are being used,
VFDs will not be needed.

1. Bring power to the input of each VFD from a
dedicated power source using conduit to the
NEMA-1 enclosure on the bottom of the drive. Each
power source shall be of the same voltage as the
respective fan and of a high enough amp rating to
handle the full load amp draw of the respective fan.

NOTE

The VFD motor overload parameter (E2-01) need to
be set to the motor nameplate FLA. Refer to the Quick
Start Guide from Yaskawa (pages 83-89) for setting
these parameters on the Yaskawa drive.

NOTE

Be sure to use appropriately sized wire for the full load
amp draw.

2. To avoid interference between the conductors,
separate conduit from the VFD output to the input
power of the fan must be used for each fan.

Vari-Green® Fan Wiring - if equipped

• 24 VAC from Vari-Flow to Vari-Green motor control
wire, black (Terminal E__-24)

• 0-10 VDC Speed Reference from Vari-Flow to
Vari-Green motor control wire, red (Terminal E__S+)

• Common from Vari-Flow to Vari-Green motor control
wire, white (Terminal E__S-)

E1-24
E1-S+
E1-S-

24 VAC RUN (BLACK)
SPEED REF. + (RED)
SPEED REF. - (WHITE)

G

NH

NOTE: POWER FOR THE

VARI-GREEN FAN GOES
DIRECTLY T O FAN

VFD-F1-E

MARK: VG

115/1

0.75 HP

VARI-GREEN

VARI-GREEN MOTOR

LINE

This is an example of Exhaust Fan 1 provided with a Vari-Green motor.

R+
R­S+

S2

S­IG

OFF

L3

L2L1

LINE

Each variable frequency drive must have the

LINE and LOAD wiring in separate conduit

VFD-F1-E

MARK: FAN MARK

VOLT/HP

MODBUS VFD

ADDRESS: X

T2T1

LOAD

T3

VFD Provided by Others, Control Wiring - if equipped

• Fault command from Vari-Flow to VFD provided by

• Run command from Vari-Flow to VFD provided by

• Speed reference from Vari-Flow to VFD provided by

MODBUS VFD

• Line power to VFD

• Load power from VFD to fan

This is an example of Exhaust Fan 1 provided with a VFD by others.

others (Terminal E__-FA, E__-FB)

others (Terminal E__-RA, E__-RB)

others (Terminal E__S+, E__S-)

E1-FA
E1-FB
E1-RA
E1-RB
E1-S+
E1-S-

NORMALLY OPEN

FAULT CONTACT

COMMON
RUN COMMAND
RUN COMMAND
SPEED REFERENCE +
SPEED REFERENCE -

L3

L2L1 T3T2T1

VFD BY OTHERS

LINE LOAD

VFD-F1-E

MARK: VFD BY

OTHERS
VOLT/PH

HP

VFD BY OTHERS

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Make-Up Air VFD in Vari-Flow Wiring - if equipped

• 24 VAC run command from Vari-Flow to make-up air
unit (Terminals S__-42, S__-43)

• Tempering status from Vari-Flow to make-up air unit
(Terminals S__-44, S__-45)

• Line power to VFD input, bottom left of VFD
(Terminals L1, L2, L3)

• Load power from VFD output, bottom right of VFD to
make-up air disconnect (Terminals T1, T2, T3)

Make-up air unit requires separate 115 VAC control
power circuit.

THIS LAST VFD IN

R+

MODBUS LINE MUST

HAVE THE END OF

R-

LINE RESISTOR

SWITCHED ON

S+

S2

S-

ON

IG

L2L1

L3

VFD-F2-S

MARK: MUA - VFD

VAV

VOLT/PH

HP

MODBUS VFD

ADDRESS: X

T3

T2T1

MODBUS VFDMUA UNIT

Make-Up Air VFD in Make-Up Air Wiring - if equipped

• 24 VAC run command from Vari-Flow to make-up air
unit (Terminals S__-42, S__-43)

• Tempering status from Vari-Flow to make-up air unit
(Terminals S__-44, S__-45)

• 0-10 VDC speed reference from Vari-Flow to
make-up air unit (Terminals S__-46, S__-47)

Power for make-up air goes directly to make-up air unit.

S1-42
S1-43
S1-44
S1-45
S1-46
S1-47

24 VAC RUN
24 VAC COM
TEMPERING STATUS
TEMPERING STATUS
SPEED REFERENCE +
SPEED REFERENCE -

NOTE: CONTROL POWER FOR
MUA GOES DIRECTLY FROM
BREAKER PANEL TO MUA.

MARK: MUA - VFD

VFD IN MUA UNIT

(0-10 VDC)

VFD-F2-S

MUA

VOLT/PH

HP

MUA - VFD IN UNIT

S2-42
S2-43
S2-44
S2-45

LINE

RUN

24 VAC

COM
TEMPERING STATUS
TEMPERING STATUS

SEPARATE CONTROL POWER
TO UNIT REQUIRED

LOAD

DISCONNECT IN UNIT

MAKE UP AIR UNIT
CONTROL WIRING
MARK: MUA - VFD

VAV
F2-S

This is an example of Supply Fan 1 being a

make-up air with VFD in the Vari-Flow.

being a make-up air with VFD in the make-up air unit.

This is an example of Supply Fan 1

Auto Tempering - if equipped

• Auto Heat/Cool enable

(Terminals S1-R, S1-W1, S1-Y1)

S1-42
S1-43
S1-44
S1-45
S1-46
S1-47

S1-R

S1-W1

S1-Y1

24 VAC RUN
24 VAC COM
TEMPERING STATUS

TEMPERING STATUS
SPEED REFERENCE +
SPEED REFERENCE ­CONTROL COMMON
HEAT
COOL

NOTE: CONTROL POWER FOR
MUA GOES DIRECTLY FROM
BREAKER PANEL TO MUA.

This is an example of Supply Fan 1 with auto tempering.

MARK: MUA - VFD

VFD IN MUA UNIT

(0-10 VDC)

VFD-F2-S

VOLT/PH

MUA

HP

MUA - VFD IN UNIT

Fire System Microswitch

• Fire system microswitch common to Vari-Flow
(Terminal C1)

• Fire system microswitch normally closed contact to
Vari-Flow (Terminal NC1)

C1 NC1

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Resistive Temperature Detectors (RTD)

Wire the two leads of the sensors to be designated
terminals in the control panel as shown below. This is
determined by the number of temperature sensors on
the job (1-10 sensors). The two wires of the sensor are
not polarity sensitive. If more than one hood is being
controlled, be sure that the appropriate sensor is wired
to the appropriate terminals as depicted on the job
specific wiring diagram.

NOTE

The RTD’s should not be exposed to direct flame. The
RTD’s are rated up to 250°F

CAUTION

Exposing the sensor to direct flame may render the
sensor inoperable and will void the warranty.

Temperature Sensors* - installed in hood

• Temperature Sensor T1 to Vari-Flow
(Terminals T1-A, T1-B)

Refer to table (example below) to cross reference the
temperature sensor and the hood mark.

*Repeat based on the number of temperature sensors.
(Terminals T2-A, T2-B | T3-A, T3-B | T4-A, T4-B | T5­A, T5-B | T6-A, T6-B | T7-A, T7-B | T8-A, T8-B | T9-A,
T9-B| T10-A, T10-B)

T1

T1-A T1-B

T2-A

T3-A

T4-A T4-B

T5-A T5-B

T6-A

T7-A

T8-A

T9-A

T10-A

T3

T5

T7

T9

T2

T4

T6

T8

T10

T2-B

T3-B

T6-B

T7-B

T8-B

T9-B

T10-B

Keypad - if equipped

• Connect provided cable from back of keypad to
CAREL® PCO5+ controller (Terminal J10)

CONNECT FACTORY PROVIDED RJ25 CABLE

TO J10 ON PCO5+ AND BACK OF KEYPAD

PCO5+ J10 KEYPAD

35 Foot Cable Provided

75 or 150 Foot Cable is Optional

Touchscreen - if equipped

Power Wiring

• Connect provided 2-wire cable from Vari-Flow
(Terminals 24H, 24C) to touch screen
(Terminals G, GO)

Control Wiring

• Connect provided 3-wire cable from Vari-Flow
(Terminals -, +, GND) to touch screen
(Terminals -, +, GND)

Power Wiring

24C
24H

TOUCH

SCREEN

GO

G

Control Wiring

-

+

GND

TOUCH

SCREEN

-

+

GND

Remote Enable - if used

• Connect remote enable common and normally open

from BMS to Vari-Flow (Terminals RE-1A, RE-1B)

A closed contact will turn on all fans.
An open contact will turn off all fans.

NOTE: Temperature interlock will override the remote

enable input.

RE-1A RE-1B

NOTE: The Vari-Flow job specific temperature sensor
table is found in the wiring diagram located on the Vari­Flow panel door. This table is an example, do not use
for your specific job.

Sensors (Field Wiring) Related Fans

Sensor Hood Mark Exhaust Fans Supply Fans

T1 Hood Mark Name 1 F1-E F11-S
T2 Hood Mark Name 2 F2-E F11-S
T3 Hood Mark Name 3 F3-E F12-S
T4 Hood Mark Name 4 F4-E F12-S
T5 Hood Mark Name 5 F5-E F12-S
T6 Hood Mark Name 6 F6-E F13-S
T7 Hood Mark Name 7 F7-E F13-S
T8 Hood Mark Name 8 F8-E F14-S
T9 Hood Mark Name 9 F9-E F14-S

T10 Hood Mark Name 10 F10-E F14-S

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Shunt Trip - if used

• 115 VAC from Vari-Flow to shunt trip breaker coil

(provided by others) (Terminals STH, STN)

Voltage across STH, STN when in fire will be 115 VAC
Voltage across STH, STN when not in fire will be 0 VAC

STH STN

STB

Electric Gas Valve with Gas Reset - if equipped

• 115 VAC from Vari-Flow to gas solenoid
(Terminals SVH, SVN)

Voltage across SVH, SVN when in fire will be 0 VAC
Voltage across SVH, SVN when not in fire and turn on
will be 115 VAC

SVH SVN

SV1

SV2

Spare Fire Relay Contacts - if equipped

• Power to common (Terminal C3)
• Power out, normally open, closed in fire

(Terminal NO3)

• Power out, normally closed, open in fire

(Terminal NC3)

• Power to common (Terminal C4)
• Power out, normally open, closed in fire

(Terminal NO4)

• Power out, normally closed, open in fire

(Terminals NC4)

(Can be used for shunt trip, alarms, etc.)

C3
A
B

NO3

NC3

121411

R6

A
B

C4
NO4
NC4

222421

R6

High Temperature Alarm Contacts - if equipped

• Power to common (Terminal HT-C)
• Power out, normally closed, open in high

temperature alarm (Terminal HT-NC)

• Power out, normally open, closed in high

temperature alarm (Terminal HT-NO)

(Can be used for shunt trip, alarms, etc.)

HT-C
A
B

A: Closed with power at H & N and high temperature
alarm inactive, closed with no power

B: Open with power at H & N and high temperature
alarm active, open with no power

HT-NC
HT-NO

222421

R13

Airflow Proving Switch(es) (provided by others) - if
equipped

• Common and normally open from supply fan 1 air
proving switch to Vari-Flow (Terminals AP-1A, AP-1B)

• Common and normally open from supply fan 2 air
proving switch to Vari-Flow (Terminals AP-2A, AP-2B)

• Common and normally open from supply fan 3 air
proving switch to Vari-Flow (Terminals AP-3A, AP-3B)

• Common and normally open from supply fan 4 air
proving switch to Vari-Flow (Terminals AP-4A, AP-4B)

NOTE: Airflow proving switch(es) are not provided with

the Vari-Flow system.

AP-1A AP-1B

AP-2A AP-2B

AP-3A AP-3B

AP-4A AP-4B

AIR PROVING SUPPLY FAN 1

AIR PROVING SUPPLY FAN 2

AIR PROVING SUPPLY FAN 3

AIR PROVING SUPPLY FAN 4

A: Open with power at H & N and fire system armed closed on
fire or no power

B: Closed with power at H & N and fire system armed open on
fire or no power

®

Wash Interface - if equipped

• Wash input from waterwash control panel (WWCP) to

Vari-Flow (Terminals WI-1A, WI-1B)

• Wash output from Vari-Flow to Grease Grabber H

O

2

or WWCP (Terminals WO-1A, WO-1B)

• Low detergent input from Grease Grabber H

O or

2

WWCP to Vari-Flow (Terminals WD-1A, WD-1B)

WASH FAN ENABLE/DISABLE

WI-1A WI-1B

WD-1A WD-1B

WO-1A

WO-1B

WASH DETERGENT

WASH OUTPUT

Vari-Flow Air Management System

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Vari-Flow Connection Checklist

Power for Vari-Flow Cabinet

 Connect 115 VAC power for controls (Terminals H, N)
 Connect 115 VAC power for hood lights, one per light

circuit (Terminals H1, N1 | H2, N2 | H3, N3 | H4, N4)

 Connect 115 VAC power to lights, one per light circuit

(Terminals B1, W1 | B2, W2 | B3, W3 | B4, W4)

Power to Variable Frequency Drives (VFD)*

 Line power to VFD input, bottom left of VFD

(Terminals L1, L2, L3)

 Load power from VFD output, bottom right of VFD

(Terminals T1, T2, T3)

Vari-Green® Fan Wiring* - if equipped

 24 VAC from Vari-Flow to Vari-Green motor control wire,

black (Terminal E__-24)

 0-10 VDC Speed Reference from Vari-Flow to Vari-Green

motor control wire, red (Terminal E__S+)

 Common from Vari-Flow to Vari-Green motor control wire,

white (Terminal E__S-)

VFD Provided by Others, Control Wiring* - if equipped

 Fault command from Vari-Flow to VFD provided by others

(Terminal E__-FA, E__-FB)

 Run command from Vari-Flow to VFD provided by others

(Terminal E__-RA, E__RB)

 Speed reference from Vari-Flow to VFD provided by others

(Terminal E__S+, E__S-)

 Line power to VFD
 Load power from VFD to fan

Make-Up Air VFD in Vari-Flow Wiring* - if equipped

 24 VAC run command from Vari-Flow to make-up air unit

(Terminals S__-42, S__-43)

 Tempering status from Vari-Flow to make-up air unit

(Terminals S__-44, S__-45)

 Line power to VFD input, bottom left of VFD

(Terminals L1, L2, L3)

 Load power from VFD output, bottom right of VFD to make-

up air disconnect (Terminals T1, T2, T3)

Make-Up Air VFD in Make-Up Air Wiring* - if equipped

 24 VAC run command from Vari-Flow to make-up air unit

(Terminals S__-42, S__-43)

 Tempering status from Vari-Flow to make-up air unit

(Terminals S__-44, S__-45)

 0-10 VDC speed reference from Vari-Flow to make-up air

unit (Terminals S__-46, S__-47)

Auto Tempering - if equipped

 Auto Heat/Cool enable

(Terminals S1-R, S1-W1, S1-Y1)

Fire System Microswitch

 Fire system microswitch common to Vari-Flow (Terminal C1)
 Fire system microswitch normally closed contact to

Vari-Flow (Terminal NC1)

* Wiring repeated based on the number of

fans of that type. This is based on the job
specific Vari-Flow wiring diagram.

Resistive Temperature Sensors* - installed in hood

 Temperature Sensor T1 (Terminals T1-A, T1-B)

If more than one temperature sensor is used, wire the

following if applicable:

 Temperature Sensor T2 (Terminals T2-A, T2-B)
 Temperature Sensor T3 (Terminals T3-A, T3-B)
 Temperature Sensor T4 (Terminals T4-A, T4-B)
 Temperature Sensor T5 (Terminals T5-A, T5-B)
 Temperature Sensor T6 (Terminals T6-A, T6-B)
 Temperature Sensor T7 (Terminals T7-A, T7-B)
 Temperature Sensor T8 (Terminals T8-A, T8-B)
 Temperature Sensor T9 (Terminals T9-A, T9-B)
 Temperature Sensor T10 (Terminals T10-A, T10-B)

Keypad - if equipped

 Connect provided RJ25 cable from back of keypad to

CAREL® PCO5+ (Terminal J10).

Touch Screen - if equipped

 Connect provided 2-wire cable from Vari-Flow

(Terminals 24H, 24C) to touch screen (Terminals G, GO)

 Connect provided 3-wire cable from Vari-Flow

(Terminals -, +, GND) to touch screen (Terminals -, +, GND)

Remote Enable- if used

Connect remote enable common and normally open from

BMS to Vari-Flow (Terminals RE-1A, RE-1B)

Shunt Trip - if used

 115 VAC from Vari-Flow to shunt trip breaker coil (provided

by others) (Terminals STH, STN)

Electric Gas Valve with Gas Reset - if equipped

 115 VAC from Vari-Flow to gas solenoid

(Terminals SVH, SVN)

Spare Fire Relay Contacts - if equipped

 Power to common (Terminal C3)
 Power out, normally open, closed in fire (Terminal NO3)
 Power out, normally closed, open in fire (Terminal NC3)

 Power to common (Terminal C4)
 Power out, normally open, closed in fire (Terminal NO4)
 Power out, normally closed, open in fire (Terminal NC4)

High Temperature Alarm Contacts - if equipped

 Power to common (Terminals HT-C)
 Power out, normally closed, open in high temperature alarm

(Terminal HT-NC)

 Power out, normally open, closed in high temperature alarm

(Terminal HT-NO)

Air Proving Switch(es) (provided by others) - if equipped
 Common and normally open from supply fan 1 air proving

switch to Vari-Flow (Terminals AP-1A, AP-1B)

 Common and normally open from supply fan 2 air proving

switch to Vari-Flow (Terminals AP-2A, AP-2B)

 Common and normally open from supply fan 3 air proving

switch to Vari-Flow (Terminals AP-3A, AP-3B)

 Common and normally open from supply fan 4 air proving

switch to Vari-Flow (Terminals AP-4A, AP-4B)

Wash Interface - if equipped

 Wash input from waterwash control panel (WWCP) to

Vari-Flow (Terminals WI-1A, WI-1B)

 Wash output from Vari-Flow to Grease Grabber H

O or

2

WWCP (Terminals WO-1A, WO-1B)

 Low detergent input from Grease Grabber H

O or WWCP to

2

Vari-Flow (Terminals WD-1A, WD-1B)

Vari-Flow Air Management System

10

®