General Information; Free Cooling Unit System; Wall-Mount Air Conditioner Units; General - Bard MULTI-TEC W18AAPA Service Instructions Manual

Free Cooling Unit System

The Bard Free Cooling Unit system is composed of
MULTI-TEC wall-mounted air conditioners matched
with an LC6000 supervisory controller or Bard th-
Tune stand-alone controller. If only one wall-mounted
air conditioner is being used, it can be matched with
either the LC6000 supervisory controller or a th-Tune
stand-alone controller. If more than one wall-mount
unit is installed, the LC6000 controller must be
matched with the air conditioning units. The wall
mounts are specifically engineered for telecom/motor
control center rooms.
NOTE: The LC6000 supervisory controller and MULTI-
TEC wall-mount units are designed specifically
to work together. The controller cannot
run other brands of systems, nor can other
controllers run the MULTI-TEC wall-mount
units. They are a complete system, and must
be used together.

Wall-Mount Air Conditioner Units

The MULTI-TEC units operate will supply 100% of
rated cooling airflow in free cooling mode with ability
to exhaust the same amount through the unit itself
without any additional relief openings in the shelter. In
the event that freecooling operation cannot satisfy the
load requirements, mechanical cooling will be utilized
to assist in cooling the shelter.
W 36
MODEL SERIES
CAPACITY
18 – 1½ Ton 42 – 3½ Ton
24 – 2 Ton 48 – 4 Ton
60 – 5 Ton
30 – 2½ Ton
36 – 3 Ton 72 – 6 Ton
A – Right Hand
L – Left Hand
E – PLC Logic Board w/Electric Reheat
M – PLC Logic Board w/Mechanical Dehumidification 
A – 230/208/60/1
B – 230/208/60/3
C – 460/60/3
D – 240/220/50/1
 Reference Supplemental Instructions
7960-801 for complete details.
MULTI-TEC Wall-Mount Unit Model Nomenclature
A A P A
REVISION
P – PLC Logic Board
VOLTS & PHASE
E – 240/220/50/3
or 220/200/50/3
F – 415/380/50/3
Q – 575/60/3

GENERAL INFORMATION

MULTI-TEC units are available with electric heat and
dehumidification options.

General

The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions explain the recommended method
to install the air cooled self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly any tags
and/or labels attached to the equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation is
made. See ADDITIONAL PUBLICATIONS on page 4
for information on codes and standards.
FIGURE 1
10 5 X X
KW
FILTER OPTIONS
X – 1" Throwaway (Standard)
W – 1" Washable
P – 2" Pleated (MERV 8)
VENTILATION OPTIONS
B – Blank-off Plate
5 – Economizer
X X E
CONTROL MODULES
E – Low Ambient Control
C – Low Ambient Control
& Crank Case Heater
COIL OPTIONS
X – Standard
1 – Phenolic Coated Evaporator
2 – Phenolic Coated Condenser
3 – Phenolic Coated Evaporator
and Condenser
SUPPLY AIR OUTLET
X – Front (Standard)
COLOR OPTIONS
X – Beige (Standard)
1 – White
4 – Buckeye Gray
Manual 2100-665D
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