Friedrich MULTI ZONE MR24DY3JMA Product guide

ENGINEERING PRODUCT
DATA BOOK
MULTI ZONE
Wall-mounted
Ceiling cassette
Concealed duct
THE EXPERTS IN ROOM AIR CONDITIONING
960-942-06

MULTI ZONEMULTI ZONE
CONTENTS
Part 1 General information
Part 2 Product data
Part 3 Design and installation
Part 4 Special parts

Part 1 General information
MULTI ZONEMULTI ZONE
Step by step system selection process (reference)
(1) Calculate or obtain the maximum heat load for the area(s) to be air conditioned
(2)
(3)
(4)
(5)
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas
or alkaline gas, are produced.
2. If the outdoor unit is installed close to the sea shore, direct exposure to the sea breeze
should be avoided and choose an outdoor unit with anti-corrosion treatment.
CAUTION
Selection of BB unit and branch
Selection of the control system
Control wiring method
Description of devices
Electrical wiring
Electrical characteristics
Field wiring
Indoor unit specifications
Outdoor unit specifications
Capacity coefficient factor
Air flow and temperature distributions
MULTI ZONEMULTI ZONE

MULTI ZONEMULTI ZONE
Part 1 General information
1. Model line up
2. Nomenclature
3. Combination
4. Individual Control System

General information _ 1
Part 1 General information
MULTI ZONEMULTI ZONE
1. Model line up
1.1 Indoor units
Category External
Appearance
Model names
Capacity (kBtu/h Class)
9 12 18
Wall mounted
MW09Y3J MW12Y3J
MW18Y3J
Ceiling
cassette 4-way
MC12Y3JM
MC18Y3JM
Ceiling
concealed
duct
Low
static
pressure
MD09Y3JM
MD12Y3JMA MD18Y3JMA

1. Model line up
2_ General information
Part 1 General information
MULTI ZONEMULTI ZONE
Model Name MR48DEY3JM
No. of connectable indoor units
(Min. ~ Max.) 2~8
Total capacity index of connectable
indoor units
65
Power supply 208/230V, 1Ø, 60Hz
External
Appearance
Branch Distribution type
1.2 Outdoor units
Multiple Piping Type
Model Name MR24DY3JMA MR36TQY3JMA
No. of connectable indoor units
(Min. ~ Max.) 2 ~ 3 2 ~ 4
Total capacity index of connectable
indoor units
36 48
Power supply 208/230V, 1Ø, 60Hz
External
Appearance

General information _ 3
1. Model line up
Part 1 General information
MULTI ZONEMULTI ZONE
BB (Branch Box) unit
Branches
1.3 Accessory for Branch Distribution type Outdoor units
Branch
Type
No. of
BB Units
Accessory
Model Name
Specifications
Gas Liquid
External
Appearance
2 DYBK
To BB unit Ø19.05 (3/4)
Ø19.05 (3/4)
To ODU
Ø19.05 (3/4)
To BB unit Ø9.52 (3/8)
Ø9.52 (3/8)
To ODU
Ø9.52 (3/8)
No. of connectable indoor units(Min. ~ Max.) 1 ~ 4
Model name D4PBB
Connectable indoor unit capacity kBtu/h 9 ~ 24
External
Appearance

2. Nomenclature
4_ General information
Part 1 General information
MULTI ZONEMULTI ZONE
M R 24 D Y 3 J MA
Installation Type
M, MA : Multi Zone
Marketing Model
Electrical rating
1 : 115V, 1Ø, 60Hz
3 : 230V, 1Ø, 60Hz
Refrigeration Cycle
C : Cool Only
Y : Heat Pump
Application
Empty : Single
U : Universal
D : Multi Zone (Max. 3 Rooms)
TQ : Multi Zone (Max. 4 Rooms)
DE : Multi Zone (Max. 8 Rooms)
Capacity
9 : 9,000 Btu/h, 12 : 12,000 Btu/h,
18 : 18,000 Btu/h, 24 : 24000 Btu/h,
30 : 30,000 Btu/h, 36 : 36,000 Btu/h,
48 : 48,000 Btu/h
Model Type
W : Wall mounted
C : Cassette
D : Concealed Ducted
R : Outdoor component
WH : Wall mounted High SEER
RH : Outdoor high SEER
Series
Mini- split

General information _ 5
Part 1 General information
3. Combination
MULTI ZONEMULTI ZONE
3.1 Selection procedure
Outdoor units selection
In general, an outdoor unit may be selected as follows, though the location of the unit, and usage of the room, etc. should
be considered. The combination of indoor and outdoor units should be determined so that the sum of indoor unit capacity
index is smaller than the max. combination capacity of the outdoor unit. Up to max.8 indoor units can be connected to one
outdoor unit. It is recommended to choose a large capacity outdoor unit if the installation space is large enough.
Indoor units selection
Look up the table on combination of indoor and outdoor units, and determine the appropriate indoor unit capacity which sat-
isfies the given thermal load.
For proper system operation, refer to the following:
1) At least 2 indoor units should be connected to outdoor unit.
2) Total capacity of indoor units connected should be minimum 40% of outdoor unit above mentioned capacity.
3) Calculation method for total capacity index = sum up the capacity index of connected indoor units.
Model name
Heat pump
20,000 32,000 48,000
24,000 36,000 54,000
3 4 8
36 48 65
MR24DY3JMA MR36TQY3JMA MR48DEY3JM
Capacity
(Btu/h)
Connectable
indoor units
Maximum No. of
connectable indoor units
Cooling
Heating
Max. capacity index of
connectable indoor units
Unit Capacity(kBtu/h Class) 9 12 18
Capacity Index 9 12 18

6_ General information
Part 1 General information
MULTI ZONEMULTI ZONE
3. Combination
3.2 Combination of indoor and outdoor unit
The total capacity index of indoor units is the sum of capacity index of each unit and should be within the capacity index of
the outdoor unit.
Note:
1. * For more capacity information, refer to the combination tables.
2. The combination of indoor and outdoor units should be determined so that the sum of indoor unit capacity index is smaller
than the max. combination capacity of the outdoor unit. Refer to the combination table.
3. At least two indoor units should be connected.
9 9,000 O O O
12 12,000 O O O
18 18,000 O O O
12 12,000 O O O
18 18,000 O O O
9 9,000 O O O
12 12,000 O O O
18 18,000 O O O
Indoor units
Capacity*
Model type
Wall mounted
Ceiling cassette
4-way
Ceiling Concealed
Duct-Low static
Index Btu/h Class
Outdoor units
MR24DY3JMA MR36TQY3JMA MR48DEY3JM
348
Maximum No. of connectable indoor units