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Table 4.  Control Factory Default Settings

PTT  

Models

Temperature 

Set Points

Defrost 

Start Times

Defrost Duration 

(Maximum)

Drip

Time

Fan 

Delay

Defrost Termination

Set Point

Cooler Models

    All cabinet sizes

35˚F

Every 3 hours of

compressor run time

60 min.

38˚F

Freezer Models

    Med. & Lg. cabinet

-10˚F

4 / day

40 min.

2 min.

2 min.

65˚F

Rigging 

Rigging holes are provided on all models. Caution should be 

exercised when moving these units. To prevent damage to 

the unit housing during rigging, cables or chains used must 

be held apart by spacer bars. The mounting platform or base 

should be level and located so as to permit free access of 

supply air.  The unit weather hood may be removed for the 

rigging process.  The condensing unit cover (wrapper) should 

be left in place.

Access Requirements

 

Provide adequate space at the compressor end of the unit for 

servicing. Provide two (2) feet of space above unit for service.

Mounting 

The system requires an opening in the ceiling to the 

dimensions stated on page 3. Mounting rails are located 

at both ends of the chassis. Mounting rails may be used to 

attach unit to ceiling. Through-bolts should be insulated or 

non-conductive to prevent sweating. The chassis is weather 

stripped around the air grille and will seal to the box roof. 

The trim ring (shipped loose), when provided, should be 

installed around the air diffuser when secured with the 

hardware provided. Be sure to adhere to your local standard 

construction codes.

Inspection

1.  Each shipment should be carefully checked against the 

bill of lading.

2.  The shipping receipt should not be signed until all items 

listed on the bill of lading have been accounted for.

3.  Check packaging for signs of damage.
4.  Any shortage or damages should be immediately 

reported to the delivering carrier.

5.  Damaged material becomes the delivering carrier’s 

responsibility, and should not be  returned to the 

manufacturer unless prior approval is given to do so.

6.  When unpacking the system, care should be taken to 

prevent damage.

7.  Avoid removing the shipping base until the unit has been 

moved to the final destination.

8.  Complete warranty return card for each unit and mail to 

Heatcraft Refrigeration Products.

General Safety Information

1.  Installation and maintenance to be performed only by 

licensed contractor.

2.  Ensure that the structural integrity of the box can 

withstand the weight of the 

 (See page 2, Table 3 for 

unit weights).

3.  Avoid contact with sharp edges and coil surfaces.  

They are a potential injury hazard.  Wear gloves during 

moving and rigging.

4.  Make sure all power sources are disconnected before 

any service work is done on units.

Trim Pieces (4)
Overlap as Shown

Evaporator Grill

Self Drilling Screw

Ceiling of Walk-in.

Trim Ring 

Installation 

Detail

Summary of Contents for PRO3 Top Mount PTT021L6B

Page 1: ...ments Recommended Unit Placement 4 Rigging Mounting Inspection General Safety Information 5 Standard Installation Procedure 6 Outdoor Unit Installation Instructions 7 2 Freezers Service Information Ma...

Page 2: ...980 5 300 208 230 1 60 8 6 15 7 3 350 No B PTT063H2B 6 680 7 100 208 230 1 60 9 8 15 9 9 550 No B PTT072H2B 7 630 8 060 208 230 1 60 10 9 15 9 3 500 No B PTT099H2B 10 490 11 340 208 230 1 60 17 1 20...

Page 3: ...3 072 Dimensional Diagrams Figure B Large Cabinet without weather hood Models PTT 052 069 099 128 25 x 381 2 panel opening required for evaporator section of large cabinet sizes 23 5 with weather hood...

Page 4: ...ocks to install top mounted equipment The size and shape of the storage will generally determine the type and number of units to be used and their location Top View One System Evaporator Section Compr...

Page 5: ...the box roof The trim ring shipped loose when provided should be installed around the air diffuser when secured with the hardware provided Be sure to adhere to your local standard construction codes...

Page 6: ...vent bunching or folding which could affect the gasket to curb sealing or trap rainwater adjacent to the curb 4 Remove the weather hood from the system The compressor compartment cover s should be lef...

Page 7: ...ver curb Figure 3 PTT unit placed on roof of walk in color see rigging instructions Figure 4 Weather hood installed after electrical service connection PTT Models Example Outdoor Curb Installation Cur...

Page 8: ...uring normal operation at the preset time intervals the temperature defrost control will de energize the compressor contactor and evaporator fans and energize the defrost heaters These functions are c...

Page 9: ...calibration 12 0 12 0 C 120 120 F allows to adjust possible offset of the thermostat probe Pr2 21 21 0 0 0 OdS Outputs activation delay at start up 0 255min This function is enabled at the initial sta...

Page 10: ...tween end of defrost and evaporator fans start Pr1 0 255 minutes 2 2 Not Applicable Fct Temperature differential avoiding short cycles of fans 0 59 C Fct 0 function disabled If the difference of tempe...

Page 11: ...ause the amount and pattern of frosting can vary greatly The frost build up is dependent on the temperature of the room the type of product being stored how often new product is brought into the room...

Page 12: ...Check ambient temp 50 F to 100 F Compressor 1 Operating beyond design conditions 1 Add equipment so that conditions are within allowable limits thermal protector 2 Dirty condenser coil 2 Clean coil s...

Page 13: ...ne Heater T stat 28917401 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Weather Hood Medium 50047901 1 1 1 1 1 1 Weather Hood Large 50047801 1 1 1 1 1 1 1 1 Right source Right parts Right now InterLink is your link to...

Page 14: ...C 3 45 F 7 C 1 52 F 11 C Room Thermostat Notes CC RT ROOM THERMOSTAT CFM CONDENSER FAN MOTOR CC COMPRESSOR CONTACTOR EFM EVAPORATOR FAN MOTOR LEGEND HL HEATER LIMIT THERMOSTAT DH DEFROST HEATER GND G...

Page 15: ...EFM EVAPORATOR FAN MOTOR LEGEND HL HEATER LIMIT THERMOSTAT DH DEFROST HEATER GND GROUND RC RUN CAPACITOR SR START RELAY USE COPPER CONDUCTORS ONLY NOT FACTORY WIRING FIELD WIRING WHEN PLUG PROVIDED SC...

Page 16: ...3 Wiring Diagram for System Electric Defrost 208 230 1 60 B Models PTT021L6B PTT031L6B PTT044L6B PTT052L6B and PTT069L6B Medium and Large Cabinet Models Wiring 208 230 1 60 voltages Indoor and Outdoor...

Page 17: ...34 F 1 C CC RT ROOM THERMOSTAT CFM CONDENSER FAN MOTOR CC COMPRESSOR CONTACTOR EFM EVAPORATOR FAN MOTOR LEGEND HL HEATER LIMIT THERMOSTAT DH DEFROST HEATER GND GROUND RC RUN CAPACITOR SR START RELAY U...

Page 18: ...R FAN MOTOR LEGEND HL HEATER LIMIT THERMOSTAT DH DEFROST HEATER GND GROUND RC RUN CAPACITOR SR START RELAY USE COPPER CONDUCTORS ONLY NOT FACTORY WIRING FIELD WIRING WHEN PLUG PROVIDED SC START CAPACI...

Page 19: ...FC TEMPERATURE FAN CYCLE SWITCH WN WIRE NUT SW SWITCH COMPRESSOR L1 L3 L2 1 2 3 208 230V 3PH 60HZ L1 T1 CC L2 T2 L3 T3 GND FAN COMP BLUE BLACK BLUE ALARM H4 H2 BLUE DEFROST COM DEFROST REFRIGERATION E...

Page 20: ...ion Products LLC makes no warranty expressed or implied of fitness for any particular purpose or of any other nature whatsoever with respect to products manufactured or sold by Heatcraft Refrigeration...

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