Bohn BMA130 Service Manual

BNMPTB

April 2008

Replaces BN-MPTB, June 2007

MEDIUM PROFILE UNIT COOLERS

Technical Guide

Models BMA | Air Defrost • BME/BML | Electric Defrost • BMG/BMF | Hot Gas Defrost

www.thecoldstandard.com

Table of Contents

Nomenclature .........................................................................................................................................................................................................2

Features & Benets ...............................................................................................................................................................................................3

Performance Data & Specications

Air Defrost ............................................................................................................................................................................................................4-5

Electric Defrost ................................................................................................................................................................................................... 6-7

Hot Gas Defrost .................................................................................................................................................................................................. 8-9

Physical Data .................................................................................................................................................................................................. 10-11

Dimensional Data ................................................................................................................................................................................................12

Replacement Parts by InterLink™ ..................................................................................................................................................................13

Standard Nozzle Selection ...............................................................................................................................................................................

We have made a commitment to customer needs, innovation and environmental stewardship and have dedicated
ourselves to delivering energy-ecient choices. PSC and EC motors will reduce costs, improve the bottom line and
enhance equipment performance and service life.

14

Choose the most energy-ecient motor available for evaporators.

The EC motor is an Energy Solutions® option on new Bohn Medium Prole
evaporators. Available on all new equipment or as an easy-to-install,
drop-in replacement aftermarket part from InterLink™ Commercial
Refrigeration Parts. Because they’re a drop-in replacement for existing
PSC motors, installation is quick and easy. It’s a high impact, quick

payback solution for reducing costs and achieving green initiatives
without replacing the entire system.

EC motors by InterLink are up to 75% ecient - that’s a 30-35%
increase over permanent-split capacitor (PSC) motors. With all of
this added eciency, you can count on more energy savings and lower
operational costs while taking a step in the right direction toward

conserving our planet’s resources.

To learn more about EC motors, visit www.interlinkparts.com/ec.

Nomenclature

BM A 130 B A

Model Series Model Type Capacity Electrical Code Design Revision

Bohn Medium
Prole Unit Coolers

2

A = Air defrost
E = Electric defrost, 6 FPI
L = Electric defrost, 4 FPI
G = Hot gas defrost, 6 FPI
F = Hot gas defrost, 4 FPI

# BTUH x 100 A = 115/1/60

B = 208-230/1/60
C = 208-230/3/60
D = 460/3/60
M = 460/1/60
E = 575/3/60
L = 575/1/60
N = 110/1/50
Q = 220/1/50
R = 380/1/50
V = 380/3/50
AE = 115/1/60 (EC)
BE = 208-230/1/60 (EC)
CE = 208-230/3/60 (EC)

©2008 Heatcraft Refrigeration Products LLC

Features & Benefits

Cabinet

Schrader valve provided for suction pressure measurement

•
External equalizer connection

•
Heavy-guage textured aluminum cabinet

•
All electrical components factory wired to terminal board

•
and identified, making it easy to field wire the unit
Sweat connections to reduce potential for leaks

•
Internal panels are isolated for quiet operation

•
Liquid line solenoid wire harness is factory-installed for

•
quick installation

Drain Pan

Front hinged drain pan for easy access

•
Large diameter drain fitting (3/4" ID)

•

Motors

Motors plug into wiring harness for easier servicing

•
Single phase EC motors available factory-installed or as

•
a drop-in replacement through InterLink™ Commercial
Refrigeration Parts in 115 and 208-230 voltages
Thermally protected, lifetime-lubricated single phase

•
PSC motors

Coil

Patented Thermo-Flex™ coil design allows the coil to

•
“flex” during periods of defrost resulting in expansion of
the coil surface. By eliminating the possibility of wear at
critical stress areas, the integrity and longevity of the unit
are dramatically increased (Patent Number 5,584,340)
Coil heater slots have been enlarged for easier

•
installation and replacement
Electric defrost models have fixed defrost termination /

•
fan delay and heater limit thermostats
Reliable nickel steel alloy defrost heater elements

•
Heaters are coil face mounted for easy access

•

Factory-installed liquid line
solenoid wiring harness for
faster installation

Innovative Thermo-Flex™ coil

Options

Totally enclosed single phase PSC motors available as an option for 208-230 and 460 voltages

•
Unit Configurations: mounted components, pre-assembled, pre-charged and Beacon II™

•

- Units available with mounted TXV and mounted TXV / solenoid valve

- Pre-assembled units come with mounted TXV, liquid line solenoid valve and room thermostat

- Pre-charged units come with mounted TXV, liquid line solenoid valve, room thermostat and quick connect fittings
(limited availability)

- Room thermostat option mounted on the back of unit

- Beacon II units come with electronic expansion valves, pressure transducer, temperature sensors and Beacon control board
Most models available with glycol circuiting (see glycol product brochure)

•
Units available with stainless steel housing and drain pan

•
Units available with copper fins. Air defrost units also available with polyester coated fins or various coil coatings options

•
Units available with insulated drain pan

•
Ship-loose air sock collar available

•
Wire fan guards for air diffusion

•
Adjustable defrost termination / fan delay thermostat

•

Bohn oers a ve-year limited guarantee against leaks at tube sheets and center supports for all medium prole unit coolers

3

Performance Data

Model BMA Air Defrost | 60 Hz

†

Diused

(Optional)

Model

Capacity Fan Data

10°F TD

25°F SST

BTUH Watts in. mm ft. m ft. m

6°C TD

- 4°C SST

No. CFM m3h

Diameter

Air Throw*

Extended

(Standard)

BMA130 13,000 3,810 1 2,300 3,910 18 457 65 20 50 15

BMA155 15,500 4,540 1 2,200 3,740 18 457 65 20 50 15

BMA245 24,500 7,180 2 4,600 7,820 18 457 65 20 50 15

BMA300 30,000 8,790 2 4,400 7,480 18 457 65 20 50 15

BMA365 36,500 10,690 3 6,900 11,730 18 457 65 20 50 15

BMA450 45,000 13,180 3 6,600 11,220 18 457 65 20 50 15

BMA510 51,000 14,940 4 9,200 15,640 18 457 65 20 50 15

BMA600 60,000 17,570 4 8,800 14,960 18 457 65 20 50 15

BMA710 71,000 20,790 5 10,500 17,850 18 457 65 20 50 15

Model BMA Air Defrost | 50 Hz

Capacity Fan Data

Model

10°F TD

25°F SST

BTUH Watts in. mm ft. m ft. m

6°C TD

- 4°C SST

‡

No. CFM m3h

Diameter

Air Throw*

Extended

(Standard)

†

Diused

(Optional)

BMA130 11,960 3,500 1 2,070 3,520 18 457 60 18.5 45 13.5

BMA155 14,260 4,180 1 1,980 3,370 18 457 60 18.5 45 13.5

BMA245 22,540 6,600 2 4,140 7,040 18 457 60 18.5 45 13.5

BMA300 27,600 8,080 2 3,960 6,730 18 457 60 18.5 45 13.5

BMA365 33,580 9,840 3 6,210 10,560 18 457 60 18.5 45 13.5

BMA450 41,400 12,130 3 5,940 10,100 18 457 60 18.5 45 13.5

BMA510 46,920 13,740 4 8,280 14,080 18 457 60 18.5 45 13.5

BMA600 55,200 16,170 4 7,920 13,460 18 457 60 18.5 45 13.5

BMA710 65,320 19,130 5 9,450 16,070 18 457 60 18.5 45 13.5

* Standard molded fan guards allow for extended air throw; optional wire guards promote air diusion

†

Air throw data based on 12-ft. high ceilings with no obstructions where velocity drops to 50 FPM

‡

For EC motors, use 60 Hz capacity and airow values (Units with EC motors operating at 50 Hz will not see a reduction in performance due to the

electronic control of the motor)

4

Specifications

Model BMA Air Defrost | 60 Hz

PSC Motor EC Motor

Model

BMA130 1/4 4.0 300 1.8 305 1.0 305 0.7 310 2.8 210 1.4 205

BMA155 1/4 4.0 300 1.8 305 1.0 305 0.7 310 2.8 210 1.4 205

BMA245 1/4 8.0 600 3.6 610 2.0 610 1.4 620 5.6 420 2.8 410

BMA300 1/4 8.0 600 3.6 610 2.0 610 1.4 620 5.6 420 2.8 410

BMA365 1/4 12.0 900 5.4 915 3.0 915 2.1 930 8.4 630 4.2 615

BMA450 1/4 12.0 900 5.4 915 3.0 915 2.1 930 8.4 630 4.2 615

BMA510 1/4 16.0 1,200 7.2 1,220 4.0 1,220 2.8 1,240 11.2 840 5.6 820

BMA600 1/4 16.0 1,200 7.2 1,220 4.0 1,220 2.8 1,240 11.2 840 5.6 820

BMA710 1/4 - 1,500 9.0 1,525 5.0 1,525 3.5 1,550 14.0 1,050 7.0 1,025

HP*

Model BMA Air Defrost | 50 Hz

Model

BMA130 1/4 4.0 1.8 1.0 2.8 1.4

BMA155 1/4 4.0 1.8 1.0 2.8 1.4

BMA245 1/4 8.0 3.6 2.0 5.6 2.8

BMA300 1/4 8.0 3.6 2.0 5.6 2.8

BMA365 1/4 12.0 5.4 3.0 8.4 4.2

BMA450 1/4 12.0 5.4 3.0 8.4 4.2

BMA510 1/4 16.0 7.2 4.0 11.2 5.6

BMA600 1/4 16.0 7.2 4.0 11.2 5.6

BMA710 1/4 - 9.0 5.0 14.0 7.0

HP

115/1/60 208-230/1/60 460/1/60 575/1/60 115/1/60 208-230/1/60

Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts Amps Watts

PSC Motor EC Motor

110/1/50 220/1/50 380/1/50 110/1/50 220/1/50

Amps Amps Amps Amps Amps

* 575/1/60 motors are 1/3 HP

5