Bohn NRGD02A014 Service Manual

Air-Cooled Condenser

with MiCroChAnnel Coil teChnology

Technical Guide

BNTBACCMCX

April 2011

TABLE OF CONTENTS

Features & Benets ........................................................................................................................................................................................... 2-3

Nomenclature .........................................................................................................................................................................................................4

Capacity and Specications ...........................................................................................................................................................................4-6

Condenser Selection ............................................................................................................................................................................................7

Dimensional Diagrams ....................................................................................................................................................................................8-9

Typical Wiring Diagram .....................................................................................................................................................................................10

Overview

Bohn microchannel air-cooled condensers feature
microchannel coil technology. These innovative units
provide signicant refrigerant and energy savings vs.
standard round tube plate n coils.

Key Benefits

Refrigerant Charge Reduction

Microchannel coils oer a very high primary to secondary
surface area ratio. This provides very ecient heat exchange
while maintaining a low internal tube volume. As a result, the
Bohn microchannel condenser reduces condenser refrigerant
charge by over 70% (NRGD02A014 vs. BNED02A015).

Energy Ecient

Bohn microchannel air-cooled condensers feature very
ecient variable speed EC motors. These motors vary speed
based on system requirements to provide optimal energy and
sound performance.

Corrosion Resistance

The mono-metal construction of the microchannel coils
virtually eliminates the risk of galvanic corrosion. A zinc
cladding standard on all coils provides additional corrosion
resistance for harsh environments.

Sound

Microchannel air-cooled condensers feature quiet variable
speed EC fan motors as a standard.

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© 2011 Heatcraft Refrigeration Products, LLC

FEATURES & BENEFITS

Key Benefits Continued

Lighter Weight

Over 30% lighter than comparable round-tube, plate n air-cooled condensers.

Lower Height

Approximately 25% lower cabinet height (with same clearance) than comparable round-tube,
plate n condensers.

Structural Robustness

The coils used in this unit are extremely rigid and resistant to damage.

Warranty

Microchannel air-cooled condensers feature a standard 2 year product warranty, a 2 year
warranty on the microchannel coil and a 3 year warranty on the variable speed EC motors.

Environmentally Friendly

100% recyclable, all -aluminum coil.

Standard Features

• Microchannel Heat Exchanger

• R-404A, R-407C, R-507, R-407A, R-422D,
and R-410A compatible

• 208-230V/3/60Hz or 460V/3/60Hz

• Factory Installed Manifolding*

• 20” clearance legs

• Copper connection points with schrader access valves

• Factory wired for customer supplied analog signal

• Direct acting, series wired motor control

• Through-the-door non-fused disconnect switch

• End access panels for coil-cleaning

• Internal baes between all fan cells

Optional Features

• 40” Clearance legs

• Individual motor fusing

• Individual motor circuit breakers

• Factory installed analog board:

- CPC

- Danfoss

- Novar

• Motor control & wiring

- Direct acting, parallel wired

- Reverse acting, series wired

- Reverse acting, parallel wired

• Export crating

• Proportional pressure control

* Single circuit standard

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NOMENCLATURE

NR G D 04 A 027

Product Line Motor Identier Width # of Fans Model Identier Standard Capacity

NR = Air Cooled

Condenser w/
Microchannel Coil
Technology

G = 710 mm VSEC D = Dual 02 = 2

04 = 4
06 = 6
08 = 8

A = Current

Revision

(MBH/Degree TD,
R404A)

CAPACITY AND SPECIFICATIONS

Condenser Capacities & Specications

R404A

Model Air Mover

NRGD02A014 710 mm VSEC 13.5 13,700 10 470 600 (1) 1-1/8 (1) 7/8
NRGD04A027 710 mm VSEC 27.0 27,400 20 920 1135 (2) 1-1/8 (2) 7/8
NRGD06A041 710 mm VSEC 40.5 41,100 30 1370 1660 (3) 1-1/8 (3) 7/8
NRGD08A054 710 mm VSEC 54.0 54,800 40 1820 2175 (4) 1-1/8 (4) 7/8

* Does not include Manifolding

Capacity

(MBH/1°F

TD)

Full Speed

AirFlow

(ft ³/min)

R404A Flooded

Refrigerant

Charge* (lbs.)

Net

Weight

(lbs.)

Ship

Weight

(lbs.)

Coil Connection

Sizes

Inlet

(in.)

Outlet

(in.)

Condenser Electrical Specications

208-230/3/60 Electrical information 460/3/60 Electrical Information

Model

NRGD02A014
NRGD04A027
NRGD06A041
NRGD08A054

FLA

4.0 15.0 15 2.0 15.0 15

8.0 15.0 15 4.0 15.0 15

12.0 15.0 15 6.0 15.0 15

16.0 20.0 20 8.0 15.0 15

MCA MOPD FLA MCA MOPD

Condenser Manifolding Specications for Single Circuit

Connection Sizes

Model

NRGD02A014 (1) 1-1/8

NRGD04A027 (1) 2-1/8 (1)1-5/8
NRGD06A041 (1) 2-1/8 (1)1-5/8
NRGD08A054 (1) 2-5/8

Note: Contact factory for connection size if not single circuit

Inlet (in.)

Outlet (in.)

(1) 7/8

(1) 2-1/8

Circuiting Options

Model

NRGD02A014

NRGD04A027

Only single circuit available

Single circuit and 50/50 split available

Circuiting

Options Available

NRGD06A041

NRGD08A054

Single circuit, 33/33/33 and 66/33 split available

Single Circuit, 50/50 split and 75/25 split available, also

25/25/25/25 and 50/25/25

Note: These units are optimized for operation at or below 15° T.D.

Operation above 15° T.D. may result in excessive pressure drop.

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