Bohn PTT052L6B Installation Manual
Installation and
Operations Manual
H-IM-82C September 2010 Part No. 25001901
PRO3 Top Mount
Packaged Refrigeration System
For Outdoor Applications
Table of Contents
1. Owner's Installation Instructions
Performance/Electrical Data
Specications .................................................................................... 2
Dimensional Diagrams ..................................................................3
Space and Location Requirements
Recommended Unit Placement .................................................4
Rigging
Mounting
Inspection
General Safety Information
Control Factory Default Settings ...............................................5
Standard Installation Procedure ................................................6
Outdoor Unit Installation Instructions.....................................7
2. Freezers
Service Information
Maintenance
Sequence of Operation
Freezer System Pre-Setpoints
Electric Defrost Sequence of Operation
Programming Electric Defrost Controls ..................................8
3. Controllers
Carel Electronic Controller .................................................... 9-19
4. Service Information
System Troubleshooting Chart ................................................ 20
Replacement Parts ....................................................................... 21
5. Wiring Information
Electrical Wiring Diagrams ..................................................22-24
6. Warranty Information ....................................................... 25
© 2010 Heatcraft Refrigeration Products, LLC
Installation and Operations Manual
Performance / Electrical Data
TABLE 1 COOLER – Air Defrost Systems
1. Owner's Operating Instructions
Model
PTT050H6B^ 5,120 5,370 208-230/1/60 7.0 15 5.9 350 A 192 87 27 6,700
PTT067H6B^ 6,860 7,190 208-230/1/60 11.5 15 9.5 550 A 207 94 29 8,700
PTT076H6B^ 7,500 7,840 208-230/1/60 9.3 15 7.8 500 A 211 95 32 9,700
PTT104H6B^ 11,190 11,810 208-230/1/60 14.8 20 12.4 875 B 270 122 47 16,800
PTT104H6C^ 11,190 11,810 208-230/3/60 11.0 15 9.3 875 B 265 120 47 16,800
PTT133H6B^ 12,790 13,500 208-230/1/60 14.8 20 12.4 825 B 290 132 52 18,000
PTT133H6C^ 12,790 13,500 208-230/3/60 11.0 15 9.3 825 B 285 129 52 18,000
BTUH @ 95˚F
35˚F Box
Temp
Voltage MCA MOPD
38˚F Box
Temp
Unit
Amps
Evaporator
CFM
TABLE 2 COOLER – Electric Defrost Systems
Model
PTT047M6B^ 5,120 208-230/1/60 7.0 15 5.9 350 A 192 87 27 6,700
PTT063M6B^ 6,860 208-230/1/60 11.5 15 9.5 550 A 207 94 29 8,700
PTT072M6B^ 7,500 208-230/1/60 9.3 15 7.8 500 A 211 95 32 9,700
PTT099M6B^ 11,190 208-230/1/60 14.8 20 12.4 875 B 270 122 47 16,800
PTT099M6C^ 11,190 208-230/3/60 11.0 15 9.3 875 B 265 120 47 16,800
PTT128M6B^ 12,790 208-230/1/60 14.8 20 12.4 825 B 290 132 52 18,000
PTT128M6C^ 12,790 208-230/3/60 11.0 15 9.3 825 B 285 129 52 18,000
BTUH @ 95˚F
34˚F Box Temp lbs. kg oz. BTUH
Voltage MCA MOPD
Unit
Amps
Evaporator
CFM
Approx.
Net
Weight
Fig.
lbs. kg oz. BTUH
Approx.
Fig.
Net
Weight
Refrig.
Charge
R-404A
Refrig.
Charge
R-404A
Total
Heat of
Rejection
Total
Heat of
Rejection
TABLE 3 FREEZER – Electric Defrost Systems
BTUH @ 95˚F
Model
PTT031L6B^
PTT044L6B^
PTT052L6B^
PTT052L6C^
PTT069L6B^
PTT069L6C^
0˚F
Box
Temp
2,680 2,160 1,340 208-230/1/60 7.6 15 6.5 350 A 213 97 26 4,300
5,870 4,530 3,400 208-230/1/60 15.9 20 13.3 520 A 225 102 29 9,900
7,000 5,360 3,910 208-230/1/60 18.1 20 15.3 900 B 275 125 45 10,900
7,000 5,360 3,910 208-230/3/60 12.2 15 13.0 900 B 270 122 45 10,900
9,060 7,100 5,250 208-230/1/60 23.8 30 20.0 875 B 280 127 47 15,300
9,060 7,100 5,250 208-230/3/60 15.9 20 14.2 875 B 275 125 47 15,300
-10˚F
Box
Temp
-20˚F
Box
Temp
* H for PSC, E for EC motors on evaporator section only
Voltage MCA MOPD
Unit
Amps
Evaporator
CFM
Approx.
Net
Weight
Fig.
lbs. kg oz. BTUH
Refrig.
Charge
R-404A
Total
Heat of
Rejection
© 2010 Heatcraft Refrigeration Products, LLC
2
PRO3 Top Mount Packaged Refrigeration System | Outdoor
Dimensional Diagrams
Figure A. Medium Cabinet Dimensions without weather hood (See reference on Page 2)
*
25" x 25" panel opening required for evaporator section of medium cabinet sizes.
* 21.5" with weather hood.
1. Owner's Operating Instructions
Figure B. Large Cabinet without weather hood
(See reference on Page 2)
(See reference on Page 2)
*
25" x 38 1/2" panel opening required for evaporator section of large cabinet sizes.
* 23.5" with weather hood.
Figure C. Medium Cabinet with weather hood
(See reference on Page 2)
Figure D. Large Cabinet with weather hood
(See reference on Page 2)
3
Recommended Unit Placement For PTT Models
Some general rules for the evaporator section placement which
must be followed are:
1. Owner's Operating Instructions
1. Ensure that the structural integrity of the box can
withstand the weight of the top mounted equipment.
2. The air pattern must cover the entire room.
3. NEVER locate the evaporator section over doors.
4. Location of aisles, racks, etc. must be known.
5. Never remove or unlock any panel cam-locks 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.
Installation and Operations Manual
NOTE: Always avoid placement of
units directly above doors
and door openings.
Top View
One System
W
Min.
Evaporator
Section
Compressor
Section
Evaporator
Airow
Evaporator
Compressor
2 x Width
Section
Section
Min.
Evaporator
Section
Compressor
Section
W
Min.
Top View
Two Systems
Multiple units must be spaced
properly to provide adequate air
circulation.
4
Evaporator
Airow
W = Unit Width
Evaporator
Airow
PRO3 Top Mount Packaged Refrigeration System | Outdoor
Trim Pieces (4)
Overlap as Shown
Evaporator Grill
Self Drilling Screw
Ceiling of Walk-in.
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.
Trim Ring
Installation
Detail
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 diuser when secured with the
hardware provided. Be sure to adhere to your local standard
construction codes.
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
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.
(See page 2 for unit
1. Owner’s Operating Instructions
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 nal destination.
8. Complete warranty return card for each unit and mail to
Heatcraft Refrigeration Products.
TABLE 4 Control Factory Default Settings
PTT
Models
H - Cooler Models
Air Defrost
M - Cooler Models
Electric Defrost
L - Freezer Models
Electric Defrost
Temperature
Set Points
38˚F 4 / day 60 min. – – 38˚F 3
Defrost
Start Times
Defrost Duration
34˚F 4 / day 40 min. 2 min. 2 min. 65˚F 2
-10˚F 4 / day 40 min. 2 min. 2 min. 65˚F 1
Changing the EZY
1. Press Set button and hold in until the display ashes "PS".
2. Press the Set Button and the display will change to "0" and
will begin to ash.
3. Press the up button until "22" is displayed.
4. Press the Set button.
5. Press the down button 2 times. "EZY" will be displayed.
6. Press the Set button.
7. Select the proper number for the model needed by
pressing the up or down key.
• 1 - L Low temperature model
• 2 - M Med temperature model
• 3 - H High temperature model
8. Press Set and wait for unit to return out of programming
mode.
9. Disconnect power
10. Press the Set Button while turning unit On
11. "CE" should display to verify programming display
(Maximum)
Drip
Time
Fan
Delay
Defrost Termination
Set Point
EZY
Default
5
The Outdoor comes standard with the
following additional components:
1. Owner's Operating Instructions
• Crankcase Heater
• Drain Line Heater
• Weather Hood
• Fan Cycling
(Pressure on 1 fan models, Pressure and Ambient
on 2 fan models).
Standard Installation Procedure
PTT Models
For outdoor use
1. Provide a 25" X 25" (medium cabinet) or
25" X 38.5" (large cabinet) opening in the
roof of walk-in cooler or as specied by the
panel manufacturer.
2. Apply silicone caulk around the perimeter of roof
opening. Place the curb on roof of cooler. It is
recommended that the curb be fastened to
the roof panels using non-conductive bolts or
insulating the bolt heads. Bolt heads should be
countersunk or low prole to prevent contact with
the system. (See Figure 1, page 7) Check the
top of the curb with a level. units require
a surface that is within 1° of level or better and no
more than a 5/8" drop per 3 feet
(17mm drop per meter).
3. Install the membrane onto the roof of the box and
over the curb. Fasten to roof per panel
manufacturer's instructions. The membrane
material should be slit over the evaporator grill
opening the aps allowed to drape into the hole
2" - 4". (See Figure 2, page 7) Care should be taken
during the membrane installation to prevent
bunching or folding which could aect 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
left in place during lifting/rigging.
5. Place system onto curbing and center over
opening in roof box. (See Figure 3, page 7)
6. It is recommended that the system be
secured to the curb with wood screws. Seal
the screw heads as necessary to prevent
moisture from entering beneath the membrane.
Additional caulk may be applied around the
perimeter of the evaporator box gasket. The
compressor compartment should not be caulked.
Installation and Operations Manual
Condensate Drain
Outlet Location
8. Remove compressor compartment cover for
access to electrical box.
9. Connect power wiring in accordance with all
applicable building and electrical codes.
10. Reinstall condensing unit cover(s).
11. Reinstall the protective weather hood.
(See Figure 4, page 7)
12. Apply power and check for proper operation.
Drain Line
A condensate drain outlet is located on the side of the
compressor compartment. Field piping may be connected
to the outlet provided it is adequately sloped and heated
for freezing weather conditions. There is a drain line "P" trap
located in the PTT unit.
General Safety information:
Do NOT lift the by the weather hood.
This product is not designed to be transported while
installed or operating.
7. Install trim pieces (if used) around the ceiling
opening in cooler.
6
PRO3 Top Mount Packaged Refrigeration System | Outdoor
PTT Models
Example Outdoor Curb Installation
(Curb supplied by others)
This area of
curb may be solid.
1. Owner's Operating Instructions
Figure 1. Curb placed on roof of walk-in cooler.
Figure 2. Roof membrane placed over curb.
Note: Do not caulk
around the base of compressor compartment.
Figure 3. PTT unit placed on roof of walk-in color.
(see rigging instructions).
Figure 4. Weather hood installed after electrical service
connection.
7
Medium and Large Cabinet Freezers
Service Information
All
units are designed for maximum durability, reliability and
simplicity. comes to you ready for operation, fully charged and
with all controls preset at the factory. The following information is
provided as an aid in the event that service is required.
Maintenance
The evaporator section of a system should be checked at
least once for proper defrosting because 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 and percentage
of time the door to the room is open. It may be necessary to
2. Freezers
periodically change the number of defrost cycles or adjust the
duration of defrost.
System Standard Maintenance Guidelines
After rst year of operation and under normal usage, maintenance
should cover the following items at least once every six months:
1. Check and tighten ALL electrical connections.
2. Check all wiring and insulators.
3. Check contactors for proper operation and for worn
contact points.
4. Check all fan motors. Tighten motor mount bolts/ nuts
and tighten fan set screws.
5. Clean the condenser coil surface.
6. Check the operation of the control system. Make certain
all safety controls are operating properly.
7. Check that all defrost controls are functioning properly.
8. Clean the evaporator coil surface.
9. Clean the drain pan and check the drain pan and drain line
for proper drainage.
Installation and Operations Manual
Refrigeration Sequence of Operation
1. Power is provided to the temperature control, compressor
contactor and cooler evaporator fans.
2. The temperature controller closes and energizes the
compressor contactor, starting the compressor,
evaporator and condenser fan(s).
3. When the system reaches the desired box temperature,
the temperature control will de-energize the compressor
contactor. Evaporator fans will continue to operate at
this point.
4.
When the xture temperature rises above the set point
and minimum o-time has elapsed, the temperature
control will close and re-energize the compressor contactor.
Electric Defrost Sequence of Operation
for Freezers
1. During 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 controlled
through relays on the controller.
2. When the coil has defrosted fully and has reached the
preset coil temperature (as sensed by the coil
temperature sensor) the defrost heater de-energizes
and the fan delay and drip sequences begin.
3. The temperature/defrost control energizes the
compressor contactor, starting the compressor and
condenser fan(s).
4. Freezer evaporator fans will be energized by the
temperature/defrost control when the coil temperature
reaches 35°F or fan delay time has elapsed.
8
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