Mitsubishi PFFY-NRMU-A Specifications download pdf (Page 22)

Y-SERIES OVERVIEW

Y-Series outdoor units are flexible enough

to cool or heat up to 50 individual zones,

maximizing building design options.

They feature low operating sound, easy

piping and maintenance design, and light

weight. Y-Series units are available in

both 208/230V and 460V up to 30 tons

for different applications,

(6-20 ton units

meet ENERGY STAR

Light Commercial

Requirements and will exceed proposed

ASHRAE 90.1 efficiency ratings for 2010).

Design flexibility

Flexibility is the key with the CITY MULTI Y-Series.

The Y-Series, just like the R2-Series, can condition up

to 50 zones intelligently. The Y-Series takes advantage of

Mitsubishi Electric’s INVERTER technology to deliver the

precise amount of cooling or heating to all connected

zones. By using T-branches and headers, the Y-Series

provides the ultimate in piping design flexibility that is truly

simple in application. The BC Controller is not used for

Y-Series installations.

The ultimate in zoning

The CITY MULTI Y-Series uses a two-pipe system with a

wide variety of indoor units and individual zone controllers to

provide the ultimate zoning system. Headers and T-branches

simplify the piping design and provide design freedom for

placement of both piping and indoor units. Individual zones

are managed by remote controllers placed in each zone or by

the centralized controller. The BC Controller is not used for

Y-Series installations.

CITY MULTI

Y-Series:

The two-pipe zoned

system designed for

heat pump operation

Intelligent energy usage

The highly responsive INVERTER technology and customized

individual zones of the CITY MULTI Y-Series provide year–

round savings. In warm summer months, the Y-Series provides

exceptional zoned cooling, and in cold winter months

the INVERTER-driven compressor provides outstanding

heating performance.

CITY MULTI systems, in combination with Mitsubishi

Electric’s TG-2000 integrated system software configured with

Tenant Billing, are able to monitor and log each zone’s energy

usage via a networked PC.

Larger projects, more options

New to the modular outdoor unit design specifications is an

option for either a 208/230V, 3-Phase, 60Hz powersource or a

460V, 3-Phase, 60Hz power source. Another feature is larger

capacities for the larger projects–to 30 tons–and an increased

number of connectable indoor units–50–with increased line

lengths. These capabilities increase the range

of potential applications for which an architect, engineer or

building owner cab specify CITY MULTI VRF systems.

Increased pipe length

The Y-Series two-pipe system offers great piping design flexibility.

Two pipes run from the Y–series outdoor unit to connect up to

50 indoor units via simple T-branches, headers, or combination

of both. A Y-Series system may have a total combined length

of refrigerant piping up to 3,280 feet one way. The farthest

distance between the Y-Series outdoor unit and any one of the

50 indoor units is 541 feet. The outdoor unit can be placed 164*

feet vertically above the lowest indoor unit or 131 feet vertically

below the highest indoor unit. The Y-Series offers exceptional

line lengths that will accommodate just about any commercial

application, including multi-story office buildings, universities, and

many, many others.

Refrigerant piping lengths Maximum feet

Total length ............................................................ 3,280

Farthest indoor from outdoor .............................. 541 (623 equivalent)

Farthest indoor unit from first branch ................... 134 – 184

Vertical differentials between units Maximum feet

Indoor/outdoor (outdoor higher) ........................... 164*

Indoor/outdoor (outdoor lower)............................. 131

Indoor/BC controller (single/main) ........................ 49

- Maximum length between single/main BC controller and

indoor is dependent upon the vertical differential between

the single/main BC controller and the indoor unit.

Indoor/indoor ......................................................... 49

Main BC Controller/Sub BC Controller ................ 49

Heat Pump

(Y- / WY- / S-Series)

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Mitsubishi PFFY-NRMU-A Specifications Page 22

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