Goodman RWEYQ User Manual
Overview
Water Cooled VRV (RWEYQ)
The VRV W Series offers an energy saving alternative
to traditional centralized equipment. Its remarkable
compact and light weight structure makes installation of
VRV technology in large buildings possible. At only 330
lbs. and less than 40” high, the VRV W Series can take
a ride up the elevator to be installed in a machine room.
Offering state of the art comfort for hotels, offices and
large commercial applications, the engineer solution
tool box just got bigger. The VRV system keeps running
costs at an absolute minimum by controlling each zone
individually and being able to shut down completely in
unoccupied areas.
VRV W Series Systems are equivalent to 4-Pipe Fan
Coil systems, but also offer a viable alternative to
WSHP Solutions. Each connected Indoor Unit can
provide heating and cooling independently to suit
zone requirements making these systems suitable for
both open plan, or cellular applications with different
operation requirements.
Two Stage Heat (Energy) Recovery is available between
indoor units on the same VRV system and then across
all the systems connected to a common water loop. This
has a dramatic impact on Power Consumption and helps
improves energy efficiency.
The VRV W Series allows for extensive refrigerant
piping, enabling several spaces to be cooled by a single
refrigerant circuit. The VRV W Series uses the same
Daikin inverter technology that is used with air-cooled
systems, but extends the application of VRV products by
utilizing the same quality family of VRV indoor units and
controls options.
Water-Side Infrastructure & Components
n
A water loop system is routed around the building,
either vertically or horizontally. This can be either
plastic or steel pipe work.
n
Heat Injection (Boilers) and Rejection (Cooling Tower
or Dry Coolers) are required to ensure that the water
loop stays between the required design conditions of
67 and 95 ° F.
n
VRV-WIII condensers are connected to the water loop
and the connecting refrigerant circuit serves indoor
units the same as any Air cooled VRV system.
n
The following Water Side components are required:
n
Strainer (Mandatory – Field Supplied)
n
Flow Switch or Differential Pressure
Switch (Essential)
n
Thermostat (For Water Temperature)
n
Circulation Pumps
n
Adjustable Flange
n
Operation Range of Water Volume is 13.2 ~ 39.5 gpm.
The optimum water volume is 16 gpm or more.
n
The Operation range for Inlet Water Temp is 50 ~ 113 F.
The Optimum Water Temp Range is 67 ~ 95 F.
n
The Geothermal Operation range for Inlet Water Temp
is 14 ~ 95 F during heating operation, and 27 ~ 113 F
during cooling operation.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2013 · Houston, Texas · USA · www.daikincomfort.com
11-14
Overview
Standard VRV-WIII Specifications
Specification Application Rules
Water Flow Rate (minimum) 16.4 - 38.5 (13.2) gpm
[62-150 (50) l/m]
Water Temp Range Cooling 50 - 113 ° F (10 - 45 ° C)
Water Temp Range Heating 50 - 113 ° F (10 - 45 ° C)
Water Temp Range Simultaneous
Cooling & Heating
Glycol Allowance 0 - 50%
Glycol Type Propylene / Ethylene
Connection Ratio 50 - 130%
50 - 113 ° F (10 - 45 ° C)
Water Cooled VRV (RWEYQ)
Geothermal Enhanced VRV-WIII Specifications
Specification Application Rules
Water Flow Rate 21 - 40 gpm (80 - 150 l/m)
Water Temp Range Cooling 48 (27)* - 113 ° F (9 (-3) -
45 ° C)
Water Temp Range Heating 14 - 113 ° F (-10 - 45 ° C)
Water Temp Range Simultaneous
Cooling & Heating
Glycol Allowance 0 - 50%***
Glycol Type Propylene / Ethylene
Connection Ratio 50 - 130%
*Application rules apply below 48 ° F. Please contact your local Daikin office for design assistance and approval.
** EWT in simultaneous heating and cooling operation can be lower than 48°F if the condenser is in heating dominant
heat recovery operation. (contact your local Daikin office for further details)
*** EWT operation range is limited to 23°F (-5°C) with 30% glycol, 40-50% glycol must be used with water
temperatures below 23°F down to a limit of 14°F
48 - 113 ° F (9 - 45 ° C)**
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2013 · Houston, Texas · USA · www.daikincomfort.com
11-14
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