Part #474750
®
Digital Temperature Interlock
Installation, Operation and Maintenance Manual
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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 a temperature controller, resistive
temperature detector (RTD), junction box, Evergreen
Product Specification
Compression Seal threaded fitting, and is contained
in a stand alone box or can be added to a pre-
engineered fan control center.
Digital 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:
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.
The temperature interlock(s) consists of a temperature
controller, resistive temperature detector (RTD),
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.
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).
The temperature interlock package shall close a
relay powering the fans when the sensor detects the
temperature set point. The interlock shall hold the
circuit closed upon fan switch being turned off until
the temperature sensor detects a temperature below
the set point plus hysteresis. Once the temperature is
below the set point plus hysteresis, the fans shall shut
down.
Performance Goals
Automatically energize the exhaust fans when cooking
equipment generates heat. Basic controls will be
provided with a temperature sensor 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. A temperature controller is used to keep the
exhaust fans running when the temperature controller
initially closes to prevent the fan from cycling on and
off at startup and shut down. Fans will shut down
automatically once the temperature has gone below
the set point plus hysteresis. The hysteresis can be
adjusted based on jobsite requirements.
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.
Digital Temperature Interlock
1
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5. Place the resistive
temperature
Installation
detector through
the compression
seal and tighten
the compression
fitting.
Control Box Mounting
Locate an area with enough space to mount the
control box and fasten to the wall.
Resistive Temperature
Detector (RTD)
PN 384439
NOTE
Octagon Extension
PN 830125
6. Install the cover
for the octagon
box.
Control box may be factory mounted. If so, continue
to the next section.
Octagon Cover
PN 380926
Resistive Temperature Detector(s)
(RTD) Mounting
Duct Collar Mounting
1. Locate the exhaust duct on top of the hood. A 3/4
to 7/8-inch (19.0 to 22.2 mm) diameter hole must
be cut into the duct 2 inches (50.8 mm) above the
hood top. Center
NOTE
Resistive temperature detector(s) may be factory
installed. If so, continue to the next section.
the hole along
0.75 to 0.875 inch
(19.0 to 22.2 mm)
2 inches
(50.8 mm)
the side of the
duct. Make sure
that the resistive
temperature
diameter hole
1. Locate flat area(s) at the top interior of the hood in
front of the filters, towards the front of the hood.
Hood Exhaust Collar
Front Side
detector will not
interfere with any
19.525 inches
3 inch air space
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 temperature sensor installation.
2 inch typical
Exhaust Area
Sensor Install
(cutout area)
2. Place the J-box plate inside of the octagon
extension ring and place over the hole in the
exhaust collar.
Supply Area
(optional)
P.O.BOX 410 SCHOFIELD
3. Disassemble the compression seal and place
TITLE
1/4-inch Compression Seal
PN 463570
through
Top View of Exhaust Hood
hole in duct
collar and
Octagon Extension
PN 830125
Quik Seal
Gasket
2. Cut a 3/4 to 7/8-inch diameter hole in the flat
spot of the capture
J-box plate
as shown.
J-Box Plate
PN 732396
tank. Make sure the
0.75 to 0.875 inch
(19.0 to 22.2 mm)
diameter hole
Tighten the
resistive temperature
detector(s) will not
interfere with fire
system nozzles and is
not within 12 inches of
light fixtures.
Lock Washer
nut inside
the octagon
extension
ring.
Nut
Hood Surface
4. Place the resistive temperature detector
through the
compression
seal and
tighten the
compression
3. Place the J-box plate inside of the octagon
extension ring and place over the hole.
4. Disassemble the compression seal and place
through hole and J-box plate as shown. Tighten the
nut inside the octagon extension ring.
Octagon Cover
PN 380926
fitting.
Compression Seal
PN 463570
5. Install the
Resistive Thermostat
Detector (RTD)
PN 384439
Octagon Extension
PN 830125
Gasket
cover for the
octagon box.
J-Box Plate
PN 732396
NOTE
Lock Washer
Nut
All field installation and wiring of electrical
equipment must be done to meet NEC and local
codes.
Digital Temperature Interlock
3
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Electrical Connections
Calibration
Electrical Connections
The temperature controller is preset by the factory
to turn the fans on at 95°F. This is controlled by
the set point on the temperature controller. The
temperature set point may have to be adjusted slightly
depending on both ambient and cooking conditions.
The adjustment is made through the buttons on
the temperature controller. To adjust, follow these
instructions:
1. Run two 18 awg thermostat wire from each
temperature sensor to the appropriate electrical
circuit connections. (See Step 3 for connection
options).
2. In junction box, connect leads on RTD to the
18 awg conductors using appropriate size
wire nuts.
• Wires are interchangeable with one another.
3. Choose the final connection based on:
• Terminals T3, T4, T5, T6, T7, T8 (if applicable) in
fan control center (KFCC).
1. Press the SET button to see the set point.
2. Press the UP/DOWN arrow button to change the
set point.
• Terminals 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 (if
applicable) in control box on top of hood/utility
cabinet.
3. Press the SET button to view the current
temperature.
4. Check system operation before making additional
adjustments.
CAUTION
Do not connect temperature sensor in series
with fan power. This will result in damage to the
temperature sensor and will require replacement.
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 5)
•
•
•
Control circuit power to terminal 7
Terminal 8 to fan starter coils
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
Digital Temperature Interlock
4
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Control Circuit Diagram (Standard Control)
CONTROL INPUT: 120VAC, 15AMPS FROM BREAKER
L1
N
2
G
UNDER SUBJECT 891
FILE #E200616
UL LISTED
LABEL DESCRIPTION
FACTORY WIRING
FIELD WIRING
T1
EF
SF
ST
OL
G
Exhaust Fan
Supply Fan
Starter
1
ALL WIRING 90°C 14 GA.
UNLESS SPECIFIED
Overload
Ground
YW
12 YW
10
5
6
C1
WIRE COLOR
S1
FS
Switch
Fire Switch
WT
BK
BK - black
BL - blue
4
2
5
1
STB Shunt Trip Breaker
N
Neutral
T1-T6 RTD Temperature Sensor
FS Fire System Microswitch
C1-C6 Controller, Dwyer 40-T
BR - brown
OR
OR
OR - orange
PR - purple
RD - red
YW - yellow
WT - white
C
NO
S1
FIELD MOUNTED SWITCH
FIELD WIRING TO SWITCH REQUIRED
RD
RD
3
4
8
FIELD WIRING: use minimum 60° Copper Wire
ST
7
TYP. EXHAUST
ST
FIELD WIRE
FIRE SYSTEM
TYP. EXHAUST
MICROSWITCH
C
FS
NO
NC
ST
TYP. SUPPLY
CONTROL INPUT: 24/120 VAC, 15AMPS FROM BREAKER
WIRING FOR ADDITIONAL SENSORS (OPTIONAL)
T2
T3
YW
YW
YW 10
11
YW 12
10
12
10
12
9
C2
C3
WT
BK
WT
BK
4
2
5
1
4
2
5
1
1
2
1
2
OR
OR
OR
OR
C
NO
C
NO
S1
T4
S1
T5
3
4
3
4
YW
YW 14
15 YW
YW 16
10
12
10
12
13
C4
C5
WT
BK
WT
BK
4
2
5
1
4
2
5
1
1
2
1
2
OR
OR
OR
OR
C
NO
C
NO
S1
T6
S1
3
4
3
4
17 YW
YW 18
10
12
C6
WT
BK
4
2
5
1
1
2
OR
OR
C
NO
S1
3
4
Digital Temperature Interlock
5
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Control Circuit Diagram (Fan Control Center)
CONTROL INPUT: 120VAC, 15AMPS FROM BREAKER
L1
N
CONTROL PANEL
Lights Switch
Fan Switch
T1
H1
N1
G
Panel Mark:
KFCC
12 inches
YW
YW
Hood Mark(s):
Motor Fan Mark
HD-1
10
12
T1
T2
TC1
FLA
HP Volt PH
Wire Breaker
RD
RD
WH
4
2
5
1
F1 EF-1
F2 MAU-1
1.5 460
1.0 460
3
3
3.0 14ga 15amp
2.8 14ga 15amp
OR
OR
C
NO
S1
18 inches
LT1
A2
OR
WH
WH
R
S1H
S1
S1N
OL1
OR
ST 1
96
95
A1
#1 Qty. Fan Switches (0-3)
#1 Qty. Light Switches (0-3)
#0 Qty. Temp. Switches (0-1)
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
Oꢁ Delay Relay
SF Failure Light
EF Failure Light
Fan Failure Light (Appl.)
Damper
2
M
L
1
-9
F
One Switch for L & F
One Breaker Con. L & F
Heat Switch
I
H
T
6 inches
Tempering SW
C
Y
X
P
V
A
R
G
B
S
Cool Switch
AD Switch
Remote Switches
Pushbutton Switches
Evap Cooler Switch
Audible ALarm
Gas Reset
Power for Gas Solenoid
Power for Shunt Trip
E
O
J
K
N
D
U
OL 1
OL 2
ST 1
T1
L1
L2
L3
T1
T2
T3
L1
L2
L3
INPUT POWER
3 WIRE
3 PHASE
Q
Gas Oꢁ w/Fans
EXH
FAN
G
G
T2
T3
Aux. Supply Contact
Tie in WWCP
1
2
W
FROM BREAKER
ST 2
Spare Fire Switch Contact
(dry contacts for building alarm)
L1
L2
L3
T1
T2
T3
T1
T2
T3
L1
L2
L3
INPUT POWER
3 WIRE
3 PHASE
SUP
FAN
Ansul(Amerex)
RD(RD)
BR(BK)
RD(RD)
C2
FROM BREAKER
BR(BK)
NC2
NC
NO
FS2
C
BK(YW)
BK(YW)
NO2
Spare Relay Contacts
(can be used for shunt trip, alarms, etc.)
(activated by FS1)
OR
R1
1
R1
1
RD
RD
BR
BK
C3
RD
YW
3
C4
4
BR
BK
A
B
NO3
NC3
NO4
NC4
A
B
4
3
5
6
R2
R2
OL2
96 95
1
8
YW
WH
ST 2
A1
A2
open w/power at H1/N1 & ꢀre sys. armed
closed on ꢀre or no power
A
closed w/power at H1/N1 & ꢀre sys. armed
open on ꢀre or no power
B
TORQUE:
FIELD WIRING:
TERMINAL STRIPS = 18 IN/LB.
GROUNDING BAR = 20 IN/LB.
use minimum
60° Copper Wire
D3
D1
D2
LABEL DESCRIPTION
FACTORY WIRING
HOOD WIRING
FIELD WIRING
EF
SF
ST
OL
C
Exhaust Fan
Supply Fan
Starter
ALL WIRING 90°C 14 GA.
UNLESS SPECIFIED
OverLoad
Contactor
Ground
G
WIRE COLOR
S
Switch
BK - black
BL - blue
LT
FS
R
Light
Fire Switch
Relay
FS1
BR - brown
OR - orange
PR - purple
RD - red
RD
RD(RD)
BR(BK)
BR
WH
C1
NC1
NO1
R1
AF
SV
Air Flow Switch
Gas Solenoid
NC
NO
2
7
C
R2
2
7
STB Shunt Trip Breaker
BK(YW)
YW - yellow
WT - white
D
Damper
Push Button
PB
EC
TC
Evap Cooler
Temperature Controller
NOTES:
Drawing shown de-energized at L1 (term.#H1),
with ꢀre system armed (non-ꢀre mode).
(in normal operation, R1 & R2 are energized)
If wall mounted prewire, or ꢀeld installed ꢀre
system, the ꢀre system microswitches must
be ꢀeld wired.
UNDER SUBJECT 891
FILE #E200616
UL LISTED
Wiring Diagram #
KFCC-TEMP-INTERLOCK
Digital Temperature Interlock
6
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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.
Fans do not turn on automatically upon cooking
equipment activation.
• Check wiring to control panel or relay box
• Multiple sensors must be wired separately
• Temperature set point too high, decrease set
2. Heat up cooking equipment with fans off. Once
the duct temperature reaches the set point of the
temperature controller the fans will start within
5 minutes. If the fans take more than 5 minutes
to start, decrease the temperature set point
by adjusting the set point on the temperature
controller (see Calibration).
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
3. If an adjustment was made in Step 2, repeat now.
4. 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 below the set point plus hysteresis, the
fans will shut down.
• Ensure wires connected to appropriate control
circuit
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
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.
Maintenance
Daily
Clean the temperature sensor with cloth and
degreaser. Keep clean for best performance.
Operation
Weekly
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 temperature
controller will open after heat is no longer present
under the hood and the temperature is below the
set point plus hysteresis, the fans shall shut down.
Dependant on grease production and grease filter
type, clean temperature sensor.
Seasonal
May have to change temperature setting on the
temperature controller if ambient kitchen temperatures
fluctuate between summer and winter seasons.
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. Once the
temperature is below the set point plus hysteresis,
the fans shall 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 _____________________________
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Frequently Asked Questions
Replacement Parts
What temperature is the temperature controller set
to from the factory?
Part
Quantity
Description
Number
95º Fahrenheit.
Temperature Sensor (RTD)
MAMAC TE-700-0-1-A
Will the temperature interlock automatically start/
stop the fans?
1
1
1
1
3
2
1
384439
384440
830125
380926
382859
382858
463570
Temperature Controller
Dwyer 40T-10
When connected properly to fan starters the
temperature interlock will automatically control
the fans without input from the user. However, the
intended use of the temperature interlock is as back-
up to manual control.
Ext, Octagon (drilled)
SC55151-1/2 (380928)
Cover, Octagon Box
SC#54-C-1RACO 722
May I connect the power going to my fan directly
through the control box?
Terminal Block, 3 pole,
DIN-RAIL MT, BUS NDN3-WH
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.
Jumper, DIN-RAIL Terminal
Block #JNDN3
Evergreen Compression Seal,
1/4-inch, #302
Can I use one control box for multiple hood systems?
This can be done, however, it is not recommended.
Any one of the temperature controllers 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.
Codes and Standards Compliance
UL 710
•
• National Fire Protection Association (NFPA 96)
• International Mechanical Code (IMC) 2006
Section 507.2.1.1
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.
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: [email protected] • Web site: www.greenheck.com
474750 • Digital Temperature Interlock, Rev. 2, May 2012
Copyright 2012 © Greenheck Fan Corporation
8
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