Accurex Temperature Interlock Installation, Operation And Maintenance Manual Download Page 8

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Control Circuit Diagram (Stand-Alone Package)

This is an example of a generic wiring diagram for standard control. It provides temperature interlock

function for two exhaust fans and one supply fan. (All starters provided by others, external to this control box).

S1H

TS1

TDR

T1-A

T1-B

TS2

THERMOSTAT(S)
WIRED IN PARALLEL

BETWEEN T1-A & T1-B

383271 (OFF DELAY 1-100 MIN)

STB
N

S
LT

EF
SF

OL
C

OR - orange

YW - yellow
WT - white

RD - red

PR - purple

FIELD WIRING

BK - black
BL - blue

UNLESS SPECIFIED

BR - brown

FACTORY WIRING

Shunt Trip Breaker
Neutral

Starter

Switch
Light

Ground

Fire MicroSwitch

Exhaust Fan
Supply Fan

Overload
Contactor

TDR

TS1-12

Time Delay Relay

Temperature Sensor

LABEL DESCRIPTION

WIRE COLOR

ALL WIRING 90°C 14 GA.

USE MINIMUM

60° Copper Wire

FIELD WIRING:

CP1

CP2

FIELD WIRE FIRE SYSTEM

MICROSWITCH

NO NC

TYP. EXHAUST

TYP. SUPPLY

CONTROL INPUT: 24/115 VAC, 15AMPS FROM BREAKER

FIELD MOUNTED SWITCH

FIELD WIRING TO SWITCH REQUIRED

CONTROL INPUT: 115VAC, 15AMPS FROM BREAKER

Temperature Interlock

Summary of Contents for Temperature Interlock

Page 1: ...r before working on or near the product Lock and tag the disconnect switch or breaker to prevent accidental power up 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 General Safety Information Only qual...

Page 2: ...consists of a time delay relay adjustable thermostat junction box and a UL Listed liquid tight ﬁtting The relay can be contained in a stand alone box or can be added to a pre engineered fan control center Purpose To meet IMC an interlock between exhaust fans and cooking equipment must be present for all Type I hood systems This product will utilize a thermostat in the exhaust duct collar or in the...

Page 3: ...ntrol Box Mounting Installation Locate an area with enough space to mount the control box and fasten to the wall Avoid installing the control box in environments with high magnetic and or radio frequency interference Hood Plan View 19 525 inches 495 9 mm 3 inch air space 76 2 mm 2 inch typical 50 8 mm Exhaust Area Supply Area optional Sensor Install cut out area 2 Find a suitable location for the ...

Page 4: ...e suppression nozzles or other items installed in the ducts If an exhaust ﬁre damper is present in the hood exhaust collar it must be removed prior to temperature sensor installation A 11 8 to 1 inch 28 6 to 31 8 mm diameter hole must be cut into the duct 2 inches 50 8 mm above the hood top 2 Place the J box plate inside the octagon extension ring and place over the hole in the exhaust collar 3 Di...

Page 5: ...all exhaust fan starter coils to terminal block CP2 5 Wire common C of dedicated ﬁre system microswitch to terminal block CP2 6 Wire normally open NO to ﬁre system microswitch mentioned in item 5 above to terminal block CP1 7 Wire normally close NC of ﬁre system microswitch mentioned in item 5 above to one side of all supply fan starter coils 8 Wire the other side of all exhaust fan and supply fan...

Page 6: ...pen NO of ﬁre system microswitch mentioned in item 3 above to terminal block CP1 5 Run three 3 low voltage wires 18 gauge from MUA unit control center down to temperature interlock panel a Terminal block R in MUA connects to terminal block CP1 in temperature interlock panel b Terminal block H in MUA connects to terminal block CP2 in temperature interlock panel c Terminal block G in MUA connects to...

Page 7: ... 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 5 3 C 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 ...

Page 8: ...D red PR purple FIELD WIRING BK black BL blue UNLESS SPECIFIED BR brown FACTORY WIRING Shunt Trip Breaker Neutral Starter Switch Light Ground Fire MicroSwitch Exhaust Fan Supply Fan Overload Contactor TDR TS1 12 Time Delay Relay Temperature Sensor LABEL DESCRIPTION WIRE COLOR ALL WIRING 90 C 14 GA USE MINIMUM 60 Copper Wire FIELD WIRING S1 CP1 CP2 FS FIELD WIRE FIRE SYSTEM MICROSWITCH NO NC C ST T...

Page 9: ...a note as to where the time relay was originally set 3 Heat up cooking equipment with fans off Once the temperature reaches the set point of the thermostat the fans will start preferably within 5 to 10 minutes If the fans take more than 15 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 adjus...

Page 10: ...y 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 be...

Page 11: ...se 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...

Page 12: ... Accurex reserves the right to change speciﬁcations without notice Product warranties can be found online at accurex com either on the speciﬁc product page or in the Warranty section of the website at Accurex com Resources Warranty Our Commitment P O Box 410 Schoﬁeld WI 54476 Phone 800 333 1400 Fax 715 241 6191 Parts 800 355 5354 accurex com ...

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