Greenheck Temperature Interlock (471738) - Manual

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!
1 Temperature Interlock
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 in a stand alone
box or can be added to a pre-engineered 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.
Product Specification
Temperature Interlock
International Mechanical Code (IMC) 2006 section
507.2.1.1 Compliant Electrical Package
Provide Greenheck Fan Corporation 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 self-contained 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 Fan Corporation 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 Fan
Corporation reserves the right to change specifications
without notice.
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Document #471738
Temperature Interlock