Master-Bilt MRS User Manual

www.master-bilt.com/products/energy_saver.htm

MRS & DRS

SERIES

Multi-Compressor

Refrigeration Systems

Why Choose Remote

DRS Series Dual Compressor

Refrigeration?

By remoting all refrigerated equipment in your estab­lishment, including reach-ins, walk-ins and ice ma­chines, to a single multi-compressor system, you can
remove the heat produced by multiple refrigeration
units from your kitchen or store and reduce your air
conditioning load and energy bill. A remote system,
typically roof-mounted, also reduces noise level, ser­vice calls and extends the life of equipment.

Why Choose Master-Bilt?

Master-Bilt’s MRS series offers many advantages over
similar systems including:

• A galvanized housing with louvered doors for
condenser coil protection (optional stainless steel
nish available)

• A single roof penetration point that reduces
installation cost and chances of roof leakage

• Modular system design that simplies congura­tion, service and upgrading

• Modules that contain head pressure controls and
crankcase heaters for low ambient protection

• Condensers are also modular and are sized for
110°F ambient application

• Time clocks for both low and medium temp com­pressors for ease of service and optional defrost
scheduling

Master-Bilt also provides
options to further boost the
efciency of MRS systems.
The patented* Master Con­troller Reverse Cycle Defrost
system, a custom-designed
electronic controller for walk­in refrigeration, saves up to
27% in energy usage over an
all-mechanical system.

Master-Bilt’s optional
Master Controller
Reverse Cycle Defrost
system saves up to
27% on energy usage.

with up to an 80% reduction in defrost energy usage.

The MRS series is part of a diverse product line
including walk-ins, reach-ins and other equipment,
making Master-Bilt a single source refrigeration pro­vider. This convenience saves the hassle and expense
of shopping for multiple sources to supply each need.

The integrated reverse cycle
defrost performs a complete­ly “clean” defrost in walk-in
evaporator coils in as little
as 3-5 minutes in a freezer or
11/2 – 2 minutes in a cooler

Systems

When your requirements call for two-compressor
unit, the DRS series is the answer. An economical
complement to the MRS series, DRS models still share
many of the same quality construction and features
as well as tting the same range of applications.

DRS systems feature:

• Compressors that use a separate refrigerant circuit
providing independent function of each system

• Scroll compressors for freezer applications up to 5 HP

• Hermetic compressors for cooler applications up to
3 HP

• Common base and frame assembly

• Standard galvanized housing with louvred doors for
condenser coil protection (optional stainless steel
nish available)
The Master Controller Reverse Cycle Defrost system

is also an option on the DRS series.

MRS/DRS System
Layout
Example

*U.S. patent no. 7,073,344

2

MRS and DRS systems can be utilized in a wide variety
of applications including:

QSRs and casual

restaurants

Hotels Corporate

cafeterias and

commercial

kitchens

Convenience stores

3

MRS Series Modular Multi-Compressor Systems

HEAD PRESSURE CONTROLS,

standard on all MRS systems, provide
protection in low ambient conditions.
Modules also come with crankcase heaters
for further protection.

REFRIGERATION MODULES

Modular design sets the MRS series apart. Each system is com-

posed of individual modules containing a condenser,

compressor, generously-sized receiver, dryer, sight glass, dual

pressure control and other appropriate components all enclosed
within a single housing. Modules can be congured individually as medium or low temp. Compres­sors are available as hermetic, semi-hermetic or scroll.

This modularity maximizes conguration exibility, simplies service and provides for future

expandibility.

4

MODULE 1

MODULE 2

MODULE 3

MODULE 4

MODULAR CONDENSER COILS are

designed so that each refrigeration module
utilizes an individual coil section. If neces­sary, a section can be replaced without
shutting down the entire system.

PITCH POCKET

inside each
MRS unit
decreases
roof leaks.

Shown in optional stainless steel nish.

PRE-WIRED ELECTRICAL PANEL

with one-point connection allows simple,
cost-effective installation and service.

5

DRS Series Dual Compressor Systems

Shown in optional
stainless steel nish.

MULTI-CIRCUITED CONDENSER COIL

designed for 110°F ambient.

PRE-WIRED ELECTRICAL PANEL

with one-point connection and a disconnect
switch included.

6

Typical Engineering Details

MRS Series

DRS Series

7

For the latest product information and specications go to www.master-bilt.com/products/products.htm.

908 Highway 15 North • New Albany, MS 38652
Phone: [phone] • Fax: [phone]
www.master-bilt.com

Due to continuous product enhancements, we reserve the right to change specications without notice.

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