Instrukcja obsługi Intermatic DDT40

Intermatic przełącznik DDT40

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Libertyville, Illinois 60048

www.intermatic.com

DDT40 Adaptive Defrost Control

Installation and Operation Manual

SAFETY SECTION

WARNING

Risk of Fire or Electrical Shock

• Disconnect the power at the circuit breaker(s) or disconnect switch(es) before

installing or servicing.

• More than one circuit breaker or disconnect switch may be required to

de-energize the equipment before servicing.

• Installation and/or wiring must be in accordance with the national and local

electrical code requirements.

• For 40 A loads, use #8 AWG wire, for 30 A loads, use #10 AWG rated at least

90º C min. - Use COPPER conductors ONLY.

• Do not exceed maximum current carrying capacity.

• Bonding between conduit connections is not automatic and must be provided as

part of the installation.

• For outdoor locations or wet locations (rain-tight), conduit hubs that comply with

requirements of the UL514B (standard for ﬁtting for conduit and outlet boxes) are

to be used.

• KEEP DOOR CLOSED AT ALL TIMES when not servicing.

• Replace the dead front after servicing or installation, if applicable.

AVERTISSEMENT

Risque d’incendie ou de choc électrique

• Pour les charges de 40 A, utiliser du ﬁl n° 8 AWG, pour les charges de 30 A,

utiliser n° 10 AWG classés 90° C minimum – Utiliser EXCLUSIVEMENT des

conducteurs en CUIVRE.

• La liaison entre les raccordements de conduits n’est pas automatique et doit être

prévue dans le cadre de l’installation.

NOTICE

• Rotate the timer dial clockwise only, rotating counter-clockwise will damage the

timer.

• Do not move the clock hands on the timer. Moving the clock hands manually may

damage the timer.

• The thermistor wire may be extended up to 400 ft (122 m) using ﬁeld-supplied

wiring between the DDT40 control and the thermistor probe location.

• Use Intermatic model number DT-B for bracket mounting of the defrost controller

board.

PRODUCT DESCRIPTION

The DDT40 Commercial Refrigeration Control is integrated with CUBE™ Adaptive Defrost sensing technology. This Adaptive I

Defrost Control with CUBE™ technology transforms a typical Intermatic DTAV40 Timer into an Adaptive Defrost Control I

which has the ability to skip scheduled defrost events when they are not needed in order to save energy. There is absolutely

no change to the Intermatic Defrost Timer load wiring. For more details, see the wiring diagrams on page 7.

The thermistor probes can be installed up to 400 ft (122 m) away from the DDT40. Additionally, it can connect up to four

thermistor probes to a single DDT40 control in order to monitor multiple evaporator coils. To order additional thermistor probe

kits, use part number 178GR10K-1.

Used in electric or hot gas defrost applications where the defrost is terminated when the coil is frost free, as sensed by a

temperature or pressure switch, even though the defrost programmed has not been reached. The termination time time

termination functions as a fail-safe and will terminate the defrost if the temperature or pressure switch fails to do so. The

temperature or pressure switch on the refrigeration coil has contacts which close on a temperature or pressure rise above

freezing, indicating that frost and ice have melted from the coil. Typically a wide differential SPDT temperature switch is used

with it’s normally closed contacts wired to the fans thereby delaying the fans from coming on until the coil temperature has

dropped back to below freezing.

DDT40 Adaptive Defrost Control

DDT40

FIG. 1 DDT40 with Enclosure FIG. 2 Bracket Mount

(Salable item DT-B. See DT-B Installation Instructions.)

Specications

Operating Voltages

• 120–240 VAC, 60 Hz

Maximum Loads:

Defrost Heater Load:

• 120 VAC: 4800 W

• 240 VAC: 9600 W

Fan and Compressor Load:

• 120 VAC: 1 HP

• 240 VAC: 2 HP

Fan Load on Terminal F:

• 120 VAC: 1 HP

• 240 VAC: 2 HP

Maximum Contact Ratings:

[1] & [3] Contacts:

• 40 A Resistive

• 1 HP @ 120 VAC

• 2 HP @ 240 VAC

[2] & [4] Contacts:

• 40 A Resistive

• 1 HP @ 120 VAC

• 2 HP @ 240 VAC

[1] & [F] Contacts:

• 40 A Resistive

• 1 HP @ 120 VAC

• 2 HP @ 240 VAC

Mounting:

• Enclosure: Type 3R rainproof indoor/outdoor plastic

Wiring Connections:

Note: Refer to WARNINGS on page 1 before proceeding.

• Screw clamp terminals: #22 AWG to #8 AWG wire

• Use #8 AWG wire with 90° C rating for 40 A loads

• Use #10 AWG wire with 90° C rating for 30 A loads

Environmental Ratings:

• Operating temperature: -40° F to 130° F

(-40° C to 55°C)

• Operating humidity: 0-95% RH non-condensing

Thermistor Probe Ratings:

• Thermistor*: Type NTC

• Rating: 10 K Ω @ 25° C

• Wire Size: 24 AWG

• Working Range: -40° F to 152° F (-40° C to 67° C)

• Thermistor probe wire length: 10 ft (3.05 m)

• Connector wire length: 6 ft (1.83 m)

*Thermistor probe connection are not an isolated Class 2

circuit.

*Only use thermistor probe speciﬁed for use with DDFM

model.

Agency Approval:

• UL Listed

INSTALLATION

Note: Refer to WARNINGS on page 1 before proceeding.

Tools Required

• Needle nose pliers

• Small ﬂathead or #4-40 TORX™ head screwdriver

• Wire cutter

• Wire stripper

• Emery cloth or evaporator cleaner

• Insulation tape, hose clamp, or wire ties (possibly

needed)

• Fish tape (possibly needed)

DDT40 Adaptive Defrost Control

Mount the Enclosure

1. Identify a suitable location for the DDT40 control.

2. Open door and remove dead front by releasing spring

latch on bottom. See FIG. 3.

3. Apply the corresponding terminal identiﬁcation and door

labels. See the included retroﬁt kit instructions.

4. If needed, remove the timer mechanism by releasing the

PCB Latch on the bottom. See FIG. 4.

5. Securely mount the enclosure. It is recommended that

you use #10 screws for mounting.

–Place the enclosure in the desired location, providing

space for the enclosure door to open fully. Mount the

enclosure using the provided mounting features. Drill

through the lower mounting holes if they are needed

to secure the enclosure. SeeFIG. 5.

6. Select and open the appropriate number of knockouts

for your installation, as shown in FIG. 6. To remove the

inner 1/2" circle of a knockout, insert a screwdriver in

the slot and carefully punch loose the knockout. If more

space is needed for the wiring, remove the 3/4" outer

ring of the knockout with pliers after removing the inner

circle. Smooth the knockout edges if necessary.

See FIG. 6.

7. Use appropriately rated ﬁttings for installation.

8. Re-install the timer in the enclosure.

9. The dead front will be snapped back into place once

wiring is complete.

Spring Latch

Dead Front

FIG. 3 Remove the Dead Front

PCB Latch

FM Timer

FIG. 4 Remove the FM Timer from the Housing

Mounting

Holes

Enclosure

Mounting

Feature

Back View

FIG. 5 Enclosure

Knockout

FIG. 6 Knockouts

Specyfikacje produktu

Marka:	Intermatic
Kategoria:	przełącznik
Model:	DDT40

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