Greenheck 471738 User Manual

Part #471738

Temperature Interlock

Installation, Operation and Maintenance Manual

Please read and save these instructions. 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! Retain instructions for future reference.

General Description

Description

The temperature interlock is designed to automatically start kitchen hood exhaust fans and keep them running while heat is being generated from the cooking appliances. Hood systems should always be manually started before equipment is turned on. If the fans are forgotten to be turned on, the interlock will turn the fans on once heat is detected. The interlock consists of an adjustable thermostat, junction box, Evergreen Quik-Seal threaded ﬁtting, and is contained

Product Speciﬁcation

Temperature Interlock

International Mechanical Code (IMC) 2006 section

507.2.1.1 Compliant Electrical Package Provide Greenheck temperature interlock electrical

package as shown on plans and in accordance with the following speciﬁcation:

The temperature interlock(s) consists of an adjustable thermostat, junction box, ﬁre proof/leak proof threaded ﬁtting (Evergreen Quik-Seal® and/or Evergreen Compression Seal), and shall be a selfcontained unit or as part of another pre-engineered electrical control package.

The temperature interlock package shall close a relay powering the fans when the set temperature is reached at the thermostat. The interlock shall hold the circuit closed upon fan switch being turned off until the temperature at the sensor decreases below the set point at which point the timed relay will begin a countdown. Once the countdown has expired and as long as the temperature has remained below the set point, the fans shall shut down.

The temperature interlock package shall be constructed by Greenheck in accordance with International Mechanical Code. The manufacturer shall provide, upon request, the necessary data that conﬁrms compliance with the code listed above.

Due to continuous research, Greenheck reserves the right to change speciﬁcations without notice.

in a stand alone box or can be added to a preengineered fan control center.

Purpose

To meet IMC 2006 section 507.2.1.1, interlock between exhaust fans and cooking equipment. This system will utilize a temperature sensor in the exhaust duct collar or in capture area of hood to detect heat generated from cooking operations and automatically activate the exhaust fans if not already turned on. Field wiring may be required depending on location of components.

Product Application

The temperature interlock is designed to be used with Type I and Type II Hoods. It is not to be used in conjunction with exhaust ﬁre dampers. Greenheck recommends using one interlock per hood system (activates all fans linked to system simultaneously).

Performance Goals

Automatically energize the exhaust fans when cooking equipment generates heat. Basic controls will be provided with a thermostat and will consist of an 8x8 electrical box with controls and a labeled terminal strip to hook-up incoming power and fan starters. An adjustable delay is used to keep the exhaust fans running when the thermostat initially closes to prevent the fan from cycling on and off at startup and shut down. Fans will shut down automatically 20 minutes after the thermostat opens its contact. The time delay can be adjusted from 1-100 minutes based on jobsite requirements.

Temperature Interlock

Table of Contents

Product Specification . . . . . . . . . . . . . . . . . . . . . . . . 1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . 1

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

Installation

Hood Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Duct Collar Mounting . . . . . . . . . . . . . . . . . . . . . . 3

Electrical Connections

Thermostat Connections . . . . . . . . . . . . . . . . . . . 4

Breaker Panel to Control Box or

Fan Control Center . . . . . . . . . . . . . . . . . . . . . . 4

Circuit Connections . . . . . . . . . . . . . . . . . . . . . . . 4

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Control Circuit Diagrams . . . . . . . . . . . . . . . . . . . 5-6

Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Frequently Asked Questions . . . . . . . . . . . . . . . . . . 8

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Codes and Standards Compliance . . . . . . . . . . . . . 8

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Receiving and Handling

Upon receiving the equipment, check for both obvious and hidden damage. If damage is found, record all necessary information on the bill of lading and ﬁle a claim with the ﬁnal carrier. Check to be sure that all parts of the shipment, including accessories, are accounted for.

Storage

If a temperature interlock must be stored prior to installation it must be protected from dirt and moisture. Indoor storage is recommended. For outdoor storage, cover the hood with a tarp to keep it clean, dry, and protected from UV (ultraviolet) radiation damage.

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

Temperature Interlock

Installation – Hood Mounting

Gasket

Compression Seal

PN 452614

Nut

Lock Washer

Octagon Extension

PN 830125

Junction Box Plate

PN 732396

19.525 inches

3 inch air space

2 inch typical

Exhaust Area

Supply Area

(optional)

Sensor Install

(cut out area)

Gasket

Compression Seal

PN 452614

Nut

Lock Washer

Octagon Extension

PN 830125

Junction Box Plate

PN 732396

Gasket

1/2 inch Quik-Seal

PN 451168

Recommended thermostat mounting location is in the flat interior of the hood and at least 8 inches

(20.32cm) from light fixture.

Duct Collar Mounting

1. Locate the exhaust duct on top of the hood. A 11⁄8to 1¼-inch (28.58 to 31.75 mm) diameter hole must be cut into the duct 2inches (50.8 mm) above the hood top. Center the hole along the side of the duct. Make sure that the thermostat will not interfere with any fire system nozzles, or other items installed in the exhaust duct. If an exhaust fire damper is present the hood exhaust collar, it must be removed prior to thermostat installation.

Hood Plan View

1. Locate the flat area(s) at the

(28.58 to 31.75 mm)

top interior of the hood in front of the filters, towards the front of the hood. A 11⁄8 to 1¼ inch

(28.58 to 31.75 mm) diameter

Hood Surface

hole must be cut into the top of the capture tank. Make sure the thermostat will not interfere with the fire system nozzles and is not within 8 inches (20.32cm) of the light fixtures.

2. Insert the Evergreen Compression Seal fitting into the hole from the inside of the hood, making sure the gasket is placed on the fitting before inserting it into the hole. Install the lock washer and 11⁄2inch

(38mm) nut on the threaded portion of the

compression seal fitting and tighten securely.

Compression Seal

PN 452614

Gasket

Octagon Extension

PN 830125

(28.58 to 31.75 mm)

Hood Exhaust Collar (front side)

2. Insert the Evergreen Quik-Seal fitting into the hole from the inside of the duct, making sure the gasket is placed on the fitting before inserting it into the hole. Install the lock washer and 1

(38.1mm) nut on the threaded portion of the

Evergreen Quik-Seal fitting and tighten securely.

Gasket

1/2 inch Quik-Seal

Octagon Extension

PN 451168

PN 830125

Junction Box Plate

PN 732396

Lock Washer

Exploded View (Components)

2 inches

(50.8 mm)

Nut

⁄2inch

3. Place the junction box provided over the fitting on

4. Thread the thermostat into the compression seal

Junction Box Plate

PN 732396

Lock Washer

Nut

Exploded View (Components)

top of the hood, keeping the fitting centered in the box.

fitting and tighten to 35 ft-lbs. (4.84 m-kgs).

3. Place the junction box provided over the fitting and tack weld the junction box to the exhaust duct keeping the fitting centered in the box. (Welding optional).

4. Thread thermostat into Evergreen Quik-Seal fitting and tighten to 35 ft-lbs (4.84 m-kgs).

Temperature Interlock

Electrical Connections

Thermostat Connections

1. Run two 14 awg, 90° minimum conductors, black, in conduit from each thermostat to the appropriate electrical circuit connections. (See Step 3 for connection options).

2. In junction box, connect leads on thermostat to the 14 awg conductors using appropriate size wire nuts.

• Wires are interchangeable with one another.

• Wire thermostats in parallel if there are multiple

exhaust ducts.

3. Choose the final connection based on:

• Terminals T1 & T2 in fan control center (KFCC).

• Terminals 5 & 6 in control box on top of hood/

utility cabinet.

CAUTION

Do not connect thermostat in series with fan power. On/off cycling of the fans will result during startup and shutdown periods. Use the thermostat for control wiring only.

Calibration

Thermostat is preset by factory to 95°F and has a slow make and break contact. It will make contact on a temperature rise and break contact on temperature fall. The temperature set point may have to be adjusted slightly depending of both ambient and cooking conditions. The adjustment knob is located on the back of the thermostat. Use a small blade screwdriver to make the adjustments.

1. Turn counterclockwise to increase the temperature set point, turn clockwise to decrease the temperature set point.

2. Quarter revolution in either direction corresponds to a 22.5°F adjustment. Be sure to make small adjustments, about 1/16 of a turn (≈6°F) or less at one time.

3. Do not exceed more than one-half revolution in either direction.

4. Check system operation before making additional adjustments.

Breaker Panel to Control Box or Fan Control Center

1. Connect a Single Pole Single Throw (SPST) switch to one of the following based on application:

• Terminals 3 & 4 in the control box.

• Terminals S1 & S1H in the fan control center.

Circuit Connections

1. Standard Interlock Control

• 120V, 10 or 15 amp circuit to terminals 1 & 2

• Control voltage for fan starter activation

• 120V, 24V or other control circuit

(drawing on page 8)

• Control circuit power to terminal 7

• Terminal 8 to fan starter coils

• 120V only control circuit

(drawing on page 9)

• Terminals 7 & 8 to fan starter coils

2. Fan Control Center Integration (KFCC)

• Power to H1 & N1 in fan control center

• No additional control circuits are required fan

starters are factory wired

Temperature Interlock

OR OR

CONTROL INPUT: 120VAC, 10AMPS FROM BREAKER

CONTROL VOLTAGE FROM BREAKER

OPTIONAL EXHAUST ON IN FIRE

FAN STARTERS

Painted Only

NEMA 3R

TS1 TS2

7 3 4 8

NO NC

COM

EXHAUST

FIRE SYSTEM

MICROSWITCH

383271 (OFF DELAY 1-100 MINUTES)

THERMOSTAT(S)

EXHAUST

SUPPLY

GREENHECK

Control Circuit Diagram (Standard Control)

TS1 TS2

COM

THERMOSTAT(S)

FAN STARTERS

EXHAUST

SUPPLY

7 3 4 8

OPTIONAL EXHAUST ON IN FIRE

CONTROL INPUT: 120VAC, 10AMPS FROM BREAKER

1 C

OR OR

383271 (OFF DELAY 1-100 MINUTES)

FIRE SYSTEM

MICROSWITCH

NO NC

8.0

GREENHECK

Painted Only

NEMA 3R

8.0

4.0

CONTROL VOLTAGE FROM BREAKER

Thermostat factory set at 95ºF (35ºC)

 Do not turn adjustment screw more than 1/2 revolution in either direction.

 1/8 turn equals 12ºF (6.7ºC)  Counterclockwise = increase temperature setting  Clockwise = decrease temperature setting

ADJUSMENT

SCREW

THERMOSTAT

CONNECTIONS

Circuit

Control

Fan Switch

Connection

Thermostat

Connection

Fan Starter

Control Circuit

FIELD

Torque to 18 in-lbs.

120/1 - 10 A

NEUTRAL

MUA EX EX

T2T1

Temperature Interlock

Part #471503

closed w/power at H1/N1 & fire system armed

Control Circuit Diagram (Fan Control Center)

CONTROL INPUT: 120VAC, 15AMPS FROM BREAKER

TYP. 1 SENSOR PER

TS1

EXHAUST COLLAR

TS2

WIRED IN PARALLEL

FACTORY MOUNTED SWITCH

LT1

S1N

ST1

A1ORA2

OL1

S1H

(Off Delay 1-100 minutes)

NOC

FACTORY WIRING TO SWITCH

INPUT POWER

3 WIRE

208/3 PHASE

FROM BREAKER

INPUT POWER

3 WIRE

208/3 PHASE

FROM BREAKER

12.0

LIGHTS

FANS

18.0

6.0

CONTROL PANEL

Installation Location:

Ship Loose

"LIGHTS" SWITCH

"FAN" SWITCH

OL1 ST1

OL2 ST2

Exh

FAN 1

Supply FAN 2

Panel Mark: Hood Mark(s):

F1-E EF-1 1.5 208 3 5.7 14 ga 15 amp F2-S SF-1 1 208 3 4.6 14 ga 15 amp

Qty. Fan Switches (0-3)

Qty. Light Switches (0-3)

Qty. Temp. Switches (0-1)

One Switch for L & F Temperature Interlock

Mounted Sensors - Factory

Mounted Sensors - Field

Heat Switch Cool Switch

AD Switch Remote Switches Audible Alarm Gas Reset Power for Gas Solenoid Power for Shunt Trip

Spare Fire Switch Contact

(dry contacts for building alarm)

Spare Relay Contacts (can be used for shunt trip, alarms, etc.)

open w/power at H1/N1 & fire system armed

closed on fire or no power

open on fire or no power

ST2

A1YWA2

OL2

Fan MarkMotor HP

RD/RD

BR/BK

NC2

BK/YW

NO2

NO3

NC3

Mark 1

Volt

Tempering SW

Gas Off w/Fans

WirePH FLA Breaker

Exhaust in Fire

MUA Interface Lights Out in Fire Fire Relay (#1)

Extra Fire Relay (#2) Extra Fire Relay (#3) DPDT Relay w/SF DPDT Relay w/EF Off Delay Relay SF Failure Light EF Failure Light Fan Failure Light (Appl.) Damper Aux. Supply Contact Tie in WWCP

Ansul / Amerex

RD/RD

BR/BK

FS2

BK/YW

(activated by FS1)

NO4

NC4

THERMOSTAT

RD(RD)

ADJUSTMENT

SCREW

FS1

BR(BK)

BK(YW)

NC1

NO1

THERMOSTAT CALIBRATION

FACTORY SETTING AT 95°F (35°C) DO NOT TURN ADJUSTMENT SCREW MORE THAN 1/2 REVOLUTION IN EITHER DIRECTION 1/8 TURN = 12°F (6.7°C) INCREASE TEMPERATURE = COUNTERCLOCKWISE DECREASE TEMPERATURE = CLOCKWISE

Switches Mounting - On Control Package

LIGHT INPUT: 120VAC,

15AMPS FROM BREAKER

S-1

1400W max.

TORQUE:

TERMINAL STRIPS = 18 IN/LB.

GROUNDING BAR = 20 IN/LB.

LABEL DESCRIPTION

Exhaust Fan

Supply Fan

Starter

OverLoad

Contactor

Ground

Switch

Light

Fire Switch

Relay

Air Flow Switch

Gas Solenoid

SV STB

Shunt Trip Breaker Damper

PushButton

Evap Cooler

NOTES:

Drawing shown de-energized at L1 (term. #H1), w/ Fire System armed (non-fire mode). (normal operation, R1 & R2 are energized) If wall mounted prewire, or field installed fire system, the fire system microswitches must be field wired.

UL LISTED

Wiring Diagram #

UNDER SUBJECT 891

FIELD WIRING:

USE MINIMUM

60° Copper Wire

FACTORY WIRING FIELD WIRING

ALL WIRING 90°C 14 GA.

UNLESS SPECIFIED

WIRE COLOR

BK - black BL - blue BR - brown OR - orange PR - purple RD - red YW - yellow WT - white

FILE #E200616

T110-2-311

Temperature Interlock

Testing

Troubleshooting

1. Turn fan switch on, then off to ensure proper fan

operation before cooking equipment is started. Once this is verified, testing can proceed.

2. For testing only, locate the time delay relay. Turn

the time adjustment knob counterclockwise to the first mark in order to expedite the testing process. Make a note as to where the timer was originally set.

3. Heat up cooking equipment with fans off. Once

the duct temperature reaches the set point of the thermostat the fans will start, preferably within 5minutes. If the fans take more than 5 minutes to start, decrease the temperature set point by turning the adjustment screw 1/16 turn clockwise. Do not apply direct flame to the thermostat

4. If an adjustment was made in Step 3, repeat now.

5. After verification of fan start-up, shut down

cooking equipment. The fan switch should still be in the off position. Once cooking equipment has cooled, the thermostat will open triggering the timer to begin. Once time has expired, the fans will shut down. Thermostat operation can be verified by checking voltage (120V) between T2 and neutral on either the control box or KFCC. 120V will be present when the thermostat senses heat.

6. Once proper operation has been verified, set

the dial on the timer relay to its original setting (approximately 20 minute delay).

NOTE

During testing, if fans do not start automatically in the first 10 minutes of cooking equipment activation, manually start fans to avoid accidental fire system dump due to heat build-up.

Fans do not turn on automatically upon cooking equipment activation.

• Check wiring to control panel or relay box, thermostats must be wired in parallel

• Temperature set point to high, decrease set point

• No power to fans, check breakers/starters/relays

Fans do not shut off.

• Switch must be in the off position

• Cooking equipment hot, wait for it to cool

• Temperature set point too low, increase set point

• Ensure wires connected to appropriate control circuit

• Time delay too great, turn down timer

Fans cycle off to on when turned off.

• Cooking equipment not cooled enough, retry in 5minutes

Fans do not turn on quick enough.

• Decrease temperature set point

Maintenance

Daily

Clean thermostat with cloth and degreaser. Keep clean for best performance. (Can clean weekly depending upon grease accumulation).

Weekly

Dependant on grease production and grease ﬁlter type, clean thermostat.

Seasonal

May have to change temperature setting on back of thermostat if ambient kitchen temperatures ﬂuctuate between summer and winter seasons.

Operation

1. Turn fans on and off using the fan switch. It is normal for the fans to remain running after the switch is turned off. The exhaust duct thermostat will open after heat is no longer present under the hood which will activate the timer to begin its countdown. Once time has expired, fans will shut down. The timer is adjustable from 1-100 minutes. The recommended time delay setting is approximately 20 minutes.

2. In the event that the cooking equipment is started without turning the fans on manually, the fans will turn on automatically and remain running with the presence of heat under the hood. The exhaust duct thermostat will open after heat is no longer present under the hood which will activate the timer to begin its countdown. Once time has expired, fans will shut down.

Whom to call

Contact your local Greenheck representative.

What to have ready for the call

Sales order, serial number and description of product.

Sales Order Number _______________________

Serial Number _____________________________

Temperature Interlock

Frequently Asked Questions

Replacement Parts

What temperature is the thermostat set from the factory?

95º Fahrenheit.

Will the temperature interlock automatically start/ stop the fans?

When connected properly to fan starters the

temperature interlock will automatically control the fans without input from the user. However intended, use as a back-up to manual control.

May I connect the power going to my fan directly through the control box?

No, the control box should only use control voltage

only (24-120V), and a separate 120V power source is required to run the temperature interlock controls. Greenheck recommends the use of starters sized for each fan.

What is the purpose of the timer in the control box?

The timer is used to delay the shut down of the fans

to prevent fan on/off cycling while the temperature in the exhaust duct can reach steady state. Without the delay, cycling could occur both on startup or shutdown of cooking equipment. The delay is typically set at 20 minutes.

Can I use one control box for multiple hood systems?

This can be done, however, it is not recommended.

Any one of the thermostats would turn on all hoods running on that control box. It is better to have one hood/fan per control box, plus a significant energy savings can be obtained if one or more of the hoods is not in operation.

Can I still turn my fan on and off?

Yes, the temperature interlock is designed to be

operated with a typical on/off switch. The fan may not turn off directly after turning the fan switch off, it will sense when the cooking operations have cooled and then turn off.

Quantity

1 383923

1 451168

1 830125

1 380926

1 381460

3 382859

2 382858

1 383271

1 452614

Part

Number

Description

Thermostat, Vulcan 1C2B9 5/8-inch Type C

Evergreen Quik-Seal, 1/2-inch #171 (1-1/8 inch hole size)

Ext, Octagon (drilled) SC55151-1/2 (380928)

Cover, Octagon Box SC#54-C-1RACO 722

Encl, 8X8X4 NEMA3R ELMATE RC-884-SC3R

Terminal Block, 3 pole, DIN-RAIL MT, BUS NDN3-WH

Jumper, DIN-RAIL Terminal Block #JNDN3

Timer SSAC #KRDB424 SPST 1-100 min.

Evergreen Compression Seal, 5/8-inch, #302

Codes and Standards Compliance

UL 710

•

• National Fire Protection Association (NFPA 96)

• International Mechanical Code (IMC) 2006 Section 507.2.1.1

Warranty

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date. Any units or parts which prove defective during the warranty period will be replaced at our option when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer for a period of one year. Should motors furnished by Greenheck prove defective during this period, they should be returned to the nearest authorized motor service station. Greenheck will not be responsible for any removal or installation costs.

As a result of our commitment to continuous improvement, Greenheck reserves the right to change speciﬁcations without notice.

AMCA Publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans, provides additional safety information. This publication can be obtained from AMCA International, Inc. at: www.amca.org.

Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Web site: www.greenheck.com

Greenheck 471738 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual