Heatcraft Grasslin DTSZ Defrost Timer Operating instructions

Brand
Heatcraft
Model
Grasslin DTSZ Defrost Timer
Type
Operating instructions

Heatcraft Grasslin DTSZ Defrost Timer is a synchronous drive defrost timer with a variety of capabilities, including:

  • Time-initiated, temperature, pressure, or time-terminated defrost: This allows you to set the timer to start defrosting based on a specific time, temperature, or pressure reading, and to stop defrosting based on a specific time or temperature reading.
  • Remote temperature or pressure sensing: This allows you to place the temperature or pressure sensor in the optimal location to accurately measure the temperature or pressure of the refrigeration system.
  • Normally closed contacts for fan control: This allows you to use the timer to control the fans in the refrigeration system, ensuring that the fans are turned off during defrosting to prevent cold air from escaping.

Heatcraft Grasslin DTSZ Defrost Timer is a synchronous drive defrost timer with a variety of capabilities, including:

  • Time-initiated, temperature, pressure, or time-terminated defrost: This allows you to set the timer to start defrosting based on a specific time, temperature, or pressure reading, and to stop defrosting based on a specific time or temperature reading.
  • Remote temperature or pressure sensing: This allows you to place the temperature or pressure sensor in the optimal location to accurately measure the temperature or pressure of the refrigeration system.
  • Normally closed contacts for fan control: This allows you to use the timer to control the fans in the refrigeration system, ensuring that the fans are turned off during defrosting to prevent cold air from escaping.
S P E C I F I C A T I O N S
E lectrical R atings :
E nvironmental R atings :
Ambient Temperature: -40F to 130F
Humidity: 0-95% non-condensing
Wiring C onnec tions :
Screw clamp terminals for #22AWG up to #8AWG wire.
Use #8 AWG wire with 90C rating for 40A loads.
Use #10 AWG wire with 90C rating for 30A loads.
E nclos ures :
Plastic NE MA 3R R aintight Indoor/Outdoor
Metal NEMA 1 Indoor
L E D Indic ation: G reen LED when in refrigeration mode
Red LE D when in defrost mode
A P P L I C A T I O N
The DTSX Defrost Timer is identical in function, terminal identifi-
cation, and wiring to the Paragon 8140 and Prec ision 6140
series Defrost Timers. The DTSX may also be used to replace
Paragon 8040 and Precision 6040 series time terminated defrost
timers. With the addition of a remote pressure switch, the DTSX
can replace the Paragon 8240 series and Precision 6240 series
pressure terminated defrost timers.
Defrosts will be initiated at the times set on the timer, which will
accept from 1 to over 24 defrost initiation settings per day at 15
minute intervals (8:00AM, 8:15AM, 8:30AM, etc .) Defrost dura-
tion is settable in 15 minute intervals from a minimum of 15 min-
utes up to several hours (15 minutes, 30 minutes, 45 minutes, 1
hour, 1 hour-15 minutes, etc.) The defrost duration determines
the termination time.
In standard c onfiguration, the c ontacts between terminals 1 and
3 are normally open and close during a defrost to energize
defrost heaters; the contacts between terminals 2 and 4 are nor-
mally closed (when timer is energized) and open during a
defrost to de-energize refrigeration and fans.
DTS X Time Initiated, R emote T emperature, P res s ure or
Time Terminated: Is used in electric or hot gas defrost applica-
tions where the defrost is terminated when the coil is frost free,
as sensed by a temperature or pressure switch, even though
the defrost programmed termination time has not been reached.
The 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
have contacts which c lose on a temperature or pressure rise to
above the freezing level, indicating that frost and ice have melt-
ed from the coil. Typically a wide differential S PDT temperature
switch is used, with it's normally closed contacts wired to the
fans, so that the fans are delayed from turning on after defrost
termination, until the coil temperature has dropped back to
below freezing. In most applications, the c ontacts at terminals
2-4 are normally c losed (when timer is energized) and control
the fans and refrigeration equipment or compressor. For hot gas
defrost, or for double pole switching, the 2-4 c ontacts may be
configured as normally open by moving jumper S 1 to the "B "
position. R efer to wiring diagrams 1 thru 12.
ÒFÓ Terminal: The DTSX contains a normally closed contact
between terminals 1-F. This terminal may be used for switching
the fans off during a defrost rather than the 2-4 terminals. For
hot gas defrost applications, with S1 in the "B " pos ition, the fans
may be connected to the "F" terminal.
I N S T A L L A T I O N
Note: For outdoor locations, R aintight
, or wet location conduit
hubs that c omply with requirements of UL 514B (s tandard for fit-
tings for conduit and outlet boxes) are to be used.
1. Remove 2 screws retaining the interior cover panel and
remove panel by prying out with a thin blade (NE MA3R ).
2. Select knockouts to be used. R emove the inner (1/2") knock-
out by inserting a sc rewdriver in the slot and c arefully punch
knockout loose. Remove slug. If the 3/4" knoc kout is
required, remove the outer ring with pliers after removing the
1/2" knockout. S mooth edges with knife if necessary.
3. Place enclosure in desired mounting loc ation and mark the
three mounting holes.
4. Drill holes for #10 screws, start screws in holes.
5. Place enclosure over screws and tighten screws.
6. C onnect c onduit hubs to c onduit before c onnecting the hubs
to the enclosure. After inserting hubs into enc losure, carefully
tighten hub lock nut. Do not over-torque.
7. If us ing NE MA1 Metal E nclos ure connec t ground wires
to ground lug on bottom of enclos ure.
(Not applicable for NE MA3R plas tic enclos ure).
8. Wire in ac cordance with National and Local C odes.
9. Replace interior cover panel and 2 sc rews (NE MA3R ).
G rounding: NEMA 3R enclosure is of plastic construction
and does not require a ground c onnection or bonding.
N E MA 3 R e n c los ure do e s no t pr o vide gro u nding be tw e e n
c o ndu its . W he n u s ing no n -m e t a llic c o n du it o r c a ble ,
c onne c t th e g r o un d w ire s o f a ll c a ble s t o g e the r w ith
a w ir e nut. W he n m e ta llic c onduit is us e d, us e
groun ding t y pe bus hin g s a nd a jum pe r w ir e be tw e e n
e a c h c onduit .
C A U T I O N : Do no t c he c k c irc u it s by Òs pa r k ingÓ w ire s
to te rm ina ls . Da m a ge to the de fro s t t im e r m a y r e s ult.
DT S X T im e I nitia te d, T e m pe ra ture , P re s s ure or
T im e Te r m ina te d 4 0 A De fr os t T im e rs
DTSX-IM-120
Defrost Timer Synchronous Drive: 40A
Blank: Plastic NEMA 3R
IM: Indoor Metal NEMA 1
M: Mechanism Only
P: Panel Mount w/standoff
B: Bracket Mount
120 VAC
240 VAC
}
}
[2] & [4] Contacts
30A Resistive
@120~240VAC
1HP @ 120VAC
2HP @ 240VAC
[1] & [3] Contacts
40A Resistive
@120~240VAC
1HP @ 120VAC
2HP @ 240VAC
[1] & [F] Contacts
30A Resistive
@120~240VAC
1HP @ 120VAC
2HP @ 240VAC
THE R MOS TAT
C OMP R E SS O R
OR
S OL ENO ID VA LVE
OR
C ONT AC TOR CO IL
DE F R OS T
HE ATE R
L1
L2
TIME R
TIME R
R E LE AS E
R E LAY
TE R MINATIO N
THE R MOS TAT
W/FAN DE LAY
1
2
X
DTS X Time/Temp. - E lectric Defrost W iring Diagram
8141 R eplacement
S 1 P osition A with 8141 Label Applied
7
8141
LAB E L
3
LINE
F A N
N
4
L1
L2
TE R MINATION
THE R MOS TAT
W/FAN DE LAY
2
4
X
N
DTS X Time/Temp. - Hot G as Defros t Wiring Diagram
8143 R eplacement
S 1 P osition B with 8143 Label Applied
8
8143
LAB E L
TIME R
R E LE AS E
R E LAY
TIME R
LINE
C ONN E C T AC R O S S
C O MP R E S SOR
THE R MOS TAT
F AN
HOT
G AS
V AL V E
1
NOT E : R emove B ridge Between 3-4
*S ee Note 1
3
L1
L2
TE R MINATION
THE R MOS TAT
2
X
DTS X T ime/Temp. - E lectric Defrost W iring Diagram
8143 R eplacement - Double P ole S witching
S 1 P osition B with 8143 Label Applied
9
8143
LAB E L
TIME R
R E LE AS E
R E LAY
TIME R
NOT E : R emove B ridge Between 3-4
NOT E : C onnect B ridge Between 2-X
3
DE F R OS T
HE ATE R
LINE
S OL ENO ID
V A LV E
OR
C ONTAC TOR
1
4
N
P R O G R A M M I N G (S ynchronous and Quartz
E lectromechanical Models )
S etting the Time:
Turn the minute hand clockwise until the time of day (and AM
or PM) on the outer dial is aligned with the triangle marker on
the inner dial.
S etting Defros t Initiation T ime:
Move a white tab (tripper) on the outer dial outward at each
desired initiation time. For example, to set defrost initiation
times at 6:00AM, 11:30AM, 4:30PM and 11:00PM, move the
tab adjacent to the "M" in AM on the dial (6:00AM), the tab
that lies between 11:30AM and 11:45 AM, the tab between
4:30PM and 4:45PM, and the tab adjacent to the
11:00-11:15PM marks. (See note for 8243/6243 replac ement.)
DO N O T R O T A T E M I N U T E H A N D C O U N T E R -C L OC K W I S E
S etting Maximum Defros t Duration:
Different defrost durations may be set for each defrost initiation
setting. E ach white tab (tripper) provides a 15 minute interval.
The tabs that set the initiation time provide a minimum of 15
minutes of defrost. For longer defrost duration, move additional
tabs (following in time) from the initiation tab. For example, if a
45 minute defrost is to start at 7:00AM,
move the tab outward that lies between
7:00 and 7:15 on the AM side of the dial,
and the tabs adjacent to 7:15-7:30 and
7:30-7:45. (3 tabs moved outward). The
defrost will initiate at 7:00AM and time ter-
minate at 7:45AM (if temperature termina-
tion does not occur first.)
For elec tronic models , refer to s eparate programming
ins tructions .
8
7
A
M
IMP OR TANT INF OR MATION: The Normally C los ed contacts between terminals 2 and 4 are only clos ed when the defros t
timer is energized . The 2-4 contacts are the Normally Open contacts of relay K 2. (Normal Open relay contacts are more
reliable than Normally C los ed). When checking continuity of the control with no voltage applied, the 2-4 contacts will
appear as open ; this is normal. The 1-3 c ontac ts will appear as open and the 1-F c ontac ts will appears as clos ed. We
recommend that the control be tes ted by us ing a voltmeter, with rated voltage applied.
Note: A definite purpos e contactor must be used to switch loads greater than the following maximum loads:
Max. Fan & C ompressor Load: 120V: 1HP
208/240V: 2HP
Max. Fan Load on Terminal "F" 120V: 1HP
208/240V: 2HP
T Y P I C A L W I R I N G DI A G R A M S
All switch positions are shown in refrigeration cycle operation, and change position upon initiation of a defrost.
C OMP R ES S OR
OR
S OL ENO ID VALVE
OR
C ONTA CT OR C OIL
F A N
MOT OR
DE F R OS T
HE ATE R
L1
L2
TIME R
TIME R
R E LE AS E
R E LAY
F
3
1-N
2
4 X
LINE
DTS X T ime/Time - E lectric Defros t Wiring Diagram
8045 R eplacement
S 1 P osition A with 8045 Label Applied
1
THE R MOS TAT
8045
LAB E L
THE R MOS TAT
C OMP R E SS O R
OR
S OL ENO ID VA LVE
OR
C ONT AC TOR CO IL
DE F R OS T
HE ATE R
L1
L2
TIME R
TIME R
R E LE AS E
R E LAY
1
2
4 X
DTS X T ime/Time - E lectric Defros t Wiring Diagram
8041 R eplacement
S 1 P osition A with 8041 Label Applied
2
8041
LAB E L
3
LINE
F A N
N
L1
L2
2
4
N
3
DTS X T ime/Time - Hot G as Defrost Wiring Diagram
8043 R eplacement
S 1 P osition B with 8043 Label Applied
3
8043
LAB E L
TIME R
R E LE AS E
R E LAY
TIME R
LINE
C ONN E C T AC R O S S
C O MP R E S SOR
THE R MOS TAT
HOT
G AS
V AL V E
F
NOT E : R emove B ridge Between 1-4
1
L1
L2
2
2
DTS X T ime/Time - E lectric Defros t Wiring Diagram
8047 R eplacement - Double P ole S witching
S 1 P osition B with 8047 Label Applied
4
8047
LAB E L
TIME R
R E LE AS E
R E LAY
TIME R
NOT E : Move Bridge to 2-2
NOT E :
3
DE F R OS T
HE ATE R
LINE
S OL ENO ID
V A LV E
OR
C ONTAC TOR
N
4
1
C OMP R ES S OR
OR
S OL ENO ID VALVE
OR
C ONTA CT OR C OIL
F A N
MOT OR
DE F R OS T
HE ATE R
L1
L2
TIME R
TIME R
R E LE AS E
R E LAY
TE R MINATION
THE R MOS TAT
W/FAN DE LAY
F
3
1 2
4
X
N
LINE
DTS X Time/Temp. - E lectric Defros t Wiring Diagram
8145 R eplacement
S 1 P osition A - No Label R equired
5
THE R MOS TAT
THE R MOS TAT
C OMP R E SS O R
OR
S OL ENO ID VA LVE
OR
C ONT AC TOR CO IL
DE F R OS T
HE AT ER
L1
N
120V
TIME R
TIME R
R E LE AS E
R E LAY
TE R MINATIO N
THE R MOS TAT
W/FAN DE LAY
1
2
4
X
DTS X Time/Temp. - E lectric Defrost W iring Diagram
120V F an & Defros t Heater; 240V C ompressor
S 1 P osition A - No Label R equired
6
3
N
F
F AN
120V
240V
L2
Max. Defrost Heater Load: 120V: 4800Watts
208V: 8320Watts
240V: 9600Watts
N
1
X
N O
C ON N E C T I ON
N
1
3
4
2
2
N O
C ON N E C T I ON
F
3
1
4
2
N
N O
C ON N E C T I ON
F
3
1
2
4
N
X
F
3
1 -N
2
4
X p
p
N
1
3
2
4
X p
p
F
3
1 -N
2
4
X p
p
N
1
3
2
4
X
1
N
3
4
2
X
F
3
1 -N
2
4
X
3
2
4
TE R MINAL IDE NTIF IC ATION
The standard DTSX terminal identification is identical to the Paragon
8145 with the addition of the "F" terminal. Terminal identification labels
are provided for the other models to be placed over the printed num-
bers on the printed circuit board. From the table below, selec t the
proper label, apply to printed c ircuit board, and wire per the original
wiring or the wiring diagrams indicated.
MODE S E L E CT ION (B lue J umperS 1)
The mode selector jumper S 1 (located at lower
right side of the board) determines the configura-
tion of contacts 2-4. In position "A" the contacts
are normally closed (only when the timer is ener-
gized), and will open during a defrost. In position
"B " the 2-4 c ontacts are normally open, and will
close during a defrost. Selec t proper pos ition
from table below, and wiring diagrams indicated.
To move jumper, pull straight away from board,
and reinsert over the top two pins for position
"B " or the bottom two pins for position "A".
N ote : When S 1 jumper is in "B " position the DTSX will operate as fol-
lows. R efrigeration Mode- R ED & G RE E N LED's will turn ON (1&3
and 2&4 break while 1&F make) Defros t Mode- R E D & G R EEN LED's
will turn OFF (1&3 and 2&4 make while 1&F break)
8 0 4 5 R E P L A C E M E N T :
The DTS X with 8045 terminal ID label applied differs from the 8045 in
that terminals 1 and N are c ombined. This means that the DTS X
model must be the same voltage as the defrost circuit (defrost heater,
contac tor coil, or hot gas valve). If being used in an application where
the defrost circuit is 120V and the refrigeration c irc uit is 240V, the
DTS X must be c onfigured for 120V application (all red jumpers insert-
ed) with 120V power connec ted to 1 -N and X , and the bridge
jumper between 1 -N and 2 must be removed.
N O T E 1 :8143 R eplacement:
When replacing a Paragon 8143 or
Prec ision 6143, wire the termination thermos tat to termi-
nal X of the DT S X and the adjac ent blank terminal. The
Paragon and Precision timers are wired to terminal N and the
blank terminal . If the termination thermostat is wired to terminal N
of the DTSX (with the 8143 label attached), temperature termination
will not oc c ur and may result in burnout of the DTMV. See wiring dia-
grams 8 & 9.
8 2 4 0 /6 2 4 0 S E R I E S R E P L A C E M E N T :
The DTS X may be used to replace the Paragon 8240 or Precision
6240 series defrost timers with integral pressure termination by the
addition of a remote pres sure switch wired to terminals X p and p of
the DTS X (with an 8240 series terminal label applied). There must be
no external voltage c onnected to the pressure switch. Set pressure
switch cut-in to the same value as set on the Paragon or Precision
defrost timer being replaced. Set cut-out 6 to 14psi below c ut-in. See
wiring diagrams 10, 11, and 12.
R e c o m m e nde d P re s s ur e S w itc he s :Johns on/Penn P170,
Ranco 010 series, or Danfoss KP1 series. Press ure range approxi-
mately 35-110ps i, C U T -I N O N P R E S S U R E R I S E .
N O T E 2 :8243 R eplacement:
When replacing a Paragon 8243 or
Prec ision 6243, the DTSX white tabs (trippers ) for setting defrost
time and defrost duration must be reversed. Pull ALL tabs outward.
Press the tabs inward at the desired defrost initiation times, and for
desired duration.
NOT E : R emove B ridge Between 1-N -2
*S ee Note 2
C O MP R E S SOR
L1
L2
TIME R
TIME R
R E LE AS E
R E LAY
F
3
2
4
LINE
DTS X T ime/Pres s ure-C ompress or S hutdown
8243 R eplacement
S 1 P osition B with T rippers R eversed
1 1
P R E S SUR E
S WITC H
1-N
p
Xp
LAB E L
8243
R E P L A C I N G E X I S T I N G DE F R O S T T I M E R S
I M P O R T A N T : When replacing a G rasslin DT-040 model with a DTS X, the power connections must be made to terminals N and 1 on the
DTS X. No connec tion must be made to the X terminal or damage to the unit will result. Disconnect the power wire from terminal X on the DT-040
and c onnect it to terminal N on the DTSX. Disc onnect the other power wire from terminal N on the DT-040 and connect it to terminal 1 on the
DTS X. All other wires should be connected to the DTSX the same as on the DT-040.
The DTS X will replace a ll models of Paragon 8040, 8140, 8240 S eries or Precision 6040, 6140, 6240 S eries
1
2
3
4
5 , 6
7
8 , 9
See Note 1
1 0
1 1
See Note 2
1 2
NOTE : In "Terminal Layout," the c onnecting lines between terminals indicate the correct positions of the bridges for each model. The heavy line
indicates the bridge must be installed as shown. The light line indicates the bridge may be removed if different voltages are us ed at eac h switch.
DTS X S 1 P os ition ÒB Ó
Terminal Typical
P aragon P rec is ion G R AS S L IN S 1 Mode Ident. Wiring Terminal L ayout
Model Model Model S elector L abel Diagram (see note below)
TIME INITIATE D, T IME TE R MINA T E D
8045 6045 DTSX A None
8046 DTSX A None
8041 6041 DTSX A 8041
8043 6043 DTSX B 8043
8047 6047 DTSX B 8047
TIME INITIATE D, R E MOT E TE MP E R AT UR E OR P R E S S UR E TE R MINAT E D
8145 6145 DTSX A None
8141 6141 DTSX A 8141
8143 6143 DTSX B 8143
TIME INITIATE D, P R E S S UR E TE R MINAT E D
(S eparate P ressure S witch R equired - see instructions)
8245 6245 DTSX A 8245
8243 6243 DTSX B 8243
8247 6247 DTSX B 8247
N O
C ON N E C T I ON
NE W S TY L E
1. Disc onnect power.
2. R emove and save insulator from Paragon timer.
3. Disc onnect wiring.
4. R emove Paragon mechanism from enclosure.
5. R emove G rasslin DT model from it's enclosure.
6. If necessary, move S1 jumper and apply terminal identi-
fication label from plastic bag to DT model as per table
on previous page.
7. Locate metal clip in plastic bag and assemble it to print-
ed c ircuit board at notch in right side.
8. Engage tabs on left side of printed circuit board in
enclosure, and swing PC B into place until tab on metal
clip engages tang on Paragon enclosure.
9. R econnect wires, tighten terminal screws sec urely.
10. Assemble insulator from plastic bag to Paragon insula-
tor by interleaving as shown.
11. Place insulator assembly over mechanism, with notch
and tab over retaining clip, and engaging tab in slot in
tang to retain insulator.
OL D S T Y L E and B R AC K E T MOUNT
1. Disc onnect power.
2. R emove and save insulator from Paragon timer.
3. Disc onnect wiring.
4. R emove and save the 6-32 sc rew. R emove and discard
two metal posts retaining Paragon mechanism.
5. R emove Paragon mechanism from enclosure.
6. R emove G rasslin DT model from it's enclosure, and with
pliers, break off the 3 tabs on left side of printed circuit
board.
7. R emove contents of plastic bag.
8. If necessary, move S1 jumper and apply terminal identi-
fication label to DT model as per table on previous
page.
9. Locate plastic 3/4"long standoff with internal threads,
and using screw from Paragon timer, assemble standoff
on top of
upper center hole in DT board with s c r e w
throu gh ba c k of board.
10. Place board in Paragon enclosure with s t a ndoff
a ligne d un de r h ole in t he e nc lo s ure 's uppe r
fla nge .
11. Assemble the 6-32 x 1/4" screw through the tapped
hole in the enclosure's flange and into the tapped hole
in the standoff. (Hold board and standoff firmly up
against the flange while driving the screw).
12. Assemble the two plastic insulator retainer posts with
screwdriver at two locations where metal posts were
removed.
13. R econnect wires, tighten terminal screws sec urely.
14. Assemble insulator from plastic bag to Paragon insula-
tor by interleaving as shown.
15. Place insulator assembly over mechanism and press
onto plastic posts.
I N S T A L L AT I O N I N E X I S T I N G E N C L O S U R E S
Timer Module
6-32 S crew From
P aragon Bracket
3/4Ó T hreaded S tandoff
From B ag Assembly
Defros t Timer
Board
Ass embly
Nylon P osts
From B ag
Ass embly
P aragon
Bracket
Interleave G rasslin
insulator (top) with
Paragon insulator
as shown here
New Style
Old Style
C A U T I O N : I f t h e De fro s t T im e r bo a r d a s s e m bly is no t
a s s e m ble d to th e bra c k e t e x a c t ly a s s ho w n a bov e , a
s hor t m a y oc c u r w hic h w ill de s tr o y t h e de fros t tim e r .
G R A S S L I N C O N T R O L S C O R P OR A T I O N
A G E Indus trial S ys tems C ompany
31 Industrial Ave. Mahwah, New J ersey 07430
Tel.: 201-825-9696 Fax: 201-825-8694
www.grasslin.com
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Heatcraft Grasslin DTSZ Defrost Timer Operating instructions

Brand
Heatcraft
Model
Grasslin DTSZ Defrost Timer
Type
Operating instructions

Heatcraft Grasslin DTSZ Defrost Timer is a synchronous drive defrost timer with a variety of capabilities, including:

  • Time-initiated, temperature, pressure, or time-terminated defrost: This allows you to set the timer to start defrosting based on a specific time, temperature, or pressure reading, and to stop defrosting based on a specific time or temperature reading.
  • Remote temperature or pressure sensing: This allows you to place the temperature or pressure sensor in the optimal location to accurately measure the temperature or pressure of the refrigeration system.
  • Normally closed contacts for fan control: This allows you to use the timer to control the fans in the refrigeration system, ensuring that the fans are turned off during defrosting to prevent cold air from escaping.
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