Trane Variable Water Flow System
Outdoor Air-cooled Water Chiller
Installation, Operation &
Maintenance
Trane Variable Water Flow System
2
•
Introduction
- What is VRF system?
•
System Profile
– System & Components
•
Chiller Unit
– Nameplate
Trane Variable Water Flow System
What Is It?
• A newly designed, digitally controlled air-cooled variable water
chiller system
–
–
Variable Refrigerant Flow in Refrigeration Loop & Variable Water
Flow in water loop
Water used as heat transfer media, no refrigerant in occupied space
Digital
Chiller
Trane Variable Water Flow System
RS48
5
Concealed
Concealed
High Wall
Cassett
e
Central
Controll
er
Thermosta
t
Thermosta
t
Remote
Controller
Remote
Controller
Inflow Water
loop
Outflow Water
loop
Communication
line
3
Outdoor Unit
 Digital Scroll Compressor
 Built-in two-speed water
pump
 Fan design delivers reduced
noise levels
Cooling capacity range
6RT 8RT 10RT 12RT 14RT
•
•
•
•
4
CGD*100/ 120/ 150/ 175/ 200
Cooling: 24.5kW - 48.5kW
Heating: 24.5kW - 48.5kW
Power source: 220V/60Hz/3Ph
380V/50Hz/3Ph
Outdoor Unit
10RT
6RT \ 8RT
Fixed
Fixed
Cabinet Size (mm) (HxWxD):
1,900 x 1,990 x 600
Digital
Fixed
5
Digital
Fixed
Digital
Cabinet Size (mm) (HxWxD):
1,900 x 1,290 x 600
12RT \ 14RT
Cabinet Size (mm) (HxWxD):
1,900 x 1,990 x 600
Digital Scroll Compressor
• Pulse Width Modulation
(PWM signal)
• 10-100% continuous
capacity control
• Superior performance
• Simplified control parts
6
Controllers
Type of ID
Concealed
Unit Controllers
Wired
System Controllers
Remote
Type
Not Available
Central Controller
(Standard)
Cassette
Hi-Wall
Not available
7
•
Central controller is a “must have”
•
Wired thermostat is Trane Patented
design
– Color back light
– Last setting for resuming power
Controllers
Central Controller
8
Wired
Controller
Remote
Controller
• Multi-zone control
• Patented design
• Remote ON/OFF fan
coil
• Individual zone
control
• LCD display
• Function setting,
temperature
regulation, air velocity
setting
• Troubleshooting
• Cooling/heating/
ventilation control
• Timer setting
• Sleeping mode
• Mode setting
• Last setting for
resuming power
• Sleep mode setting,
timer setting function
• Remote control
distance ≥5M
How to Select “EarthWise”
OD Parameter Setting:
Set leaving water temp to 5°C
via central controller
In-Door Unit Selection:
• Concealed unit: select
“Earthwise” application
• High wall & Cassette: Not
available
Choose “Earthwise” option in
TDS tools to run product
configuration report
9
• Digit 17: Application
-
N = Normal application
E = Earthwise
Model Number Description
C G D K100 2 H E A Z R N R R A C
1 2 3 4 5,6,7 8 9 10 11 12 13 14 15 16 17 18
Digit 1,2,3 — Unit Type
CGD= Digital Air-Cooled Water Chiller Refrigeration Circuit
Digit 4 R = Heat Pump K = Cooling Only
Digit 5-7 — Nominal Capacity (Tons) 100 = 6 120 = 8 150 = 10 175 = 12 200 = 14
Digit 8 — Voltage Selection 2 = 220V/60 Hz/3 ph 5 = 380V/50 Hz/3 ph
Digit 9— Airflow Configuration H = Horizontal
Digit 10— Refrigerant E = R-22
Digit 11 — Manufacturing Code (defaulted by factory) A = Double Compressors B =
Triple Compressors
Digit 12 — Central Controller Z = With Central Controller (as standard)
Digit 13 — Chilled Water Pump R = Water Pump
Digit 14 — Auxiliary Electric Heater in Water Circuit N = None
Digit 15 — Ambient Temperature R = Standard Ambient Temperature Set
(Standard)
Digit 16 — Water Pipe Direction (Face to the Airflow) R = Right Side (Standard) B =
Back Side (Optional)
Digit 17 — Design Sequence (Not for client) A = First Version B = Second Version
Digit 18 — Region V = China A = APR B = MAIR C = LAR
10
11
12
13
14
15
16
PVC Pipe Installation Benefits
• PVC pipe and fitting price is 4 times
cheaper than steel pipe’s.
• PVC Pipe weight is 6 times less than
steel pipe’s.
• Use smaller pipe size because
friction loss of PVC pipe is much
less than steel pipe’s.
• Easy transportation, Easier and
quicker installation, longevity
17
PVC Pipe Installation Benefits
Size
½”
¾”
1”
1 1/4”
1 1/2”
2
2 1/2”
3”
3 1/2”
4”
5”
6”
18
PVC Class 13.5
(Kg/m)
0.22
0.265
0.417
0.542
0.7
1.075
1.712
2.375
3.852
5.0807
8.092
12.515
Steel Sch#40
(Kg/m)
1.26
1.68
2.50
3.39
4.06
5.48
8.66
11.3
13.7
16.2
22.0
28.5
Size Diff.
(time)
5.7
6.3
5.9
6.2
5.8
5.0
5.0
4.7
3.5
2.7
2.7
2.2
PVC Pipe Installation Benefits
Size
½”
¾”
1”
1 1/4”
1 1/2”
2”
2 1/2”
3”
4”
5”
6”
8”
19
PVC Class 13.5 vs Black Steel Pipe #40
(ERW)*
64%
67%
64%
67%
63%
59%
57%
53%
37%
43%
39%
33%
*The percentage price difference is based on the price in
PVC Pipe Installation
22