Johnson Controls RW SERIES Engineering Manual

Johnson Controls
Brand
Johnson Controls
Model
RW SERIES
Category
Heat pumps
Type
Engineering Manual

This manual is also suitable for

s Engineering Guide
R
W
S
erie
s
iGid
RW Series
Commercial Reversible Chiller - 60 Hz
• 10-50 Tons
9LQWDJH'
Design Features
Factory Options
Accessories
Dim
ensional Data
Ph
ysical Data
Performance Data
En
g
ineerin
g
G
uide
S
peci
fi
cations
Form: 146.00-EG6A (0614)
Supersedes: 146.00-EG6A (0314)
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
T
able of Contents
N
o
m
e
n
c
l
a
t
u
r
e
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4
AHRI D
a
t
a
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-
The RW
S
eries
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7-
8
Inside the RW
S
eries
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9
-1
1
C
ontrols
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12-1
5
R
W
S
eries Application Notes
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1
6
-1
7
Water
Q
ualit
y
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1
7
S
election Process
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1
8
T
y
pical Pipin
g
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1
8
-1
9
Ph
y
sical Dimensions
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2
0
-2
1
V
i
b
r
a
ti
o
n I
so
l
a
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o
r
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2
2
Ph
y
sical Data
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2
3
El
ec
tri
ca
l D
a
t
a
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24
Anti
f
reeze
C
orrection
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2
5
R
e
f
erence
C
alculations
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2
6
Le
g
end and Notes
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2
6
Pressure Dro
p
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2
7
P
e
r
fo
rm
a
n
ce
D
a
t
a
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2
8
-
37
Wirin
g
S
chematics
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38
-
39
En
g
ineerin
g
G
uide
S
peci
f
ications
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4
0
-4
3
R
evision
G
uid
e
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4
5
4
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
M
odel Nomenclatur
e
All RW
S
eries product is
S
a
f
et
y
listed under UL1995 thru ETL and per
f
ormance tested in accordanc
e
with standard AHRI
/
I
SO
1
3
2
56
-2.
V
olta
g
e Availabilit
y
V
olta
ge
Mode
l
12
0
1
80
24
0
360
600
2
08
-2
30/60/3
•
•
•
•
N
/
A
4
60/60/3
••
••
••
•
•
5
7
5/60/3
•
•
•
•
•
380/60/3
••
N
/
A N
/
A
•
•
03/05/
14
Le
g
end
:
NA = N
o
t Av
a
il
ab
l
e
•
= Volta
g
e available in this siz
e
••
= Volta
g
e and so
f
t start available in this siz
e
RWXW 120 R 3 A E 8 N N
1-4 5-7 8 9 12 13 14
Model
RWXW – RW Series
Reversible Chiller
Unit Capacity (MBTUH)
120, 180, 240, 360, 600
Operation
R - Reversible
Voltage
3 – 208-230/60/3
4 – 460/60/3
5 – 575/60/3
8 – 380/60/3
Phase Protection
A – Non-Fused Disconnect, Phase Guard
B – Non-Fused Disconnect, IntelliStart®
C – Fused Disconnect, Phase Guard
D – Fused Disconnect, IntelliStart
Chassis
E – Enclosed
P – Enclosed with Pressure Gauges
Vintage
Non-Standard
Options
SS
- Standard
Future Option
N – Future Use
Future Option
N – Future Use
Controls
8 – FX10 without Communication,
with User Interface
9 – FX10 with Open N2 Communication
Card with User Interface
0 – FX10 with Lonworks Communication
Card with User Interface
3 – FX10 with BacNet Communication
Card with User Interface
Rev.: 14 February 2014D
SS
15-16
'
17
10 11
Notes:
See electrical availability table for detailed offering by voltage
5
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
AHRI/ASHRAE/ISO 13256-2 Water-to-Water Ratings
g
E
n
g
lish
(
IP
)
Units
M
ode
l
Capacit
y
M
odulation
Flow Rat
e
Water Loo
p
Heat Pum
p
G
round Water Heat Pum
p
G
round Loo
p
Heat Pum
p
Coolin
g
E
ST 86°F
E
LT 53.
6
o
F
Heatin
g
E
ST 68°F
E
LT 10
4
o
F
Coolin
g
E
ST 59°F
E
LT 53.
6
o
F
Heatin
g
E
ST 50°F
E
LT 10
4
o
F
Coolin
g
Full EST 77°F
P
art EST 6
8
o
F
E
LT 53.
6
o
F
Heatin
g
Full EST 32°F
P
art ELT 4
1
o
F
E
LT 10
4
o
F
S
g
pm
Lg
p
m
Capacit
y
Btuh
E
ER
Btuh
/W
Capacit
y
Btuh
CO
P
Capacit
y
Btuh
E
ER
Btuh
/W
Capacit
y
Btuh
CO
P
Capacit
y
Btuh
E
ER
Btuh
/W
Capacit
y
Btuh
CO
P
120
Full 4
0
4
0
145,400 1
6
.
0
189,000 4.
5
161,400 22.
5
157,200
3
.
8
147,700 17.
3
118,800
3
.
0
P
ar
t
4
0
4
0
79,300 17.4 101,500
5
.
1
84,400 24.
1
84,600 4.4 82,900 22.
2
69,800
3
.
3
180
Full
60
60
201,300 1
5
.
9
263,700 4.
6
225,100 21.
5
217,000
3
.
9
208,300 17.
2
173,400
3
.
2
P
ar
t
60
60
105,500 17.
0
138,700
5
.
0
177,700 2
3
.
0
112,600 4.
2
115,400 2
0
.
5
100,900
3
.
5
2
40
Full
80
80
265,700 1
6
.
0
347,500 4.
7
306,900 2
3
.4 280,600
3
.
9
275,300 17.
9
219,400
3
.
3
P
ar
t
80
80
140,100 1
6
.
7
182,100
5
.
0
163,600 24.
6
141,400 4.
2
150,000 21.
6
115,800
3
.
5
3
60
Full 12
0
12
0
394,700 1
6
.
0
487,600 4.
3
452,300 22.
1
420,300 4.
0
410,200 17.
5
339,300
3
.
3
P
ar
t
12
0
12
0
206,000 1
6
.
9
256,000 4.
6
241,100 2
3
.
2
214,400 4.
3
223,200 21.
2
183,500
3
.
7
600
Full 2
00
2
00
602,000 1
5
.
2
798,000 4.
3
756,000 1
9
.
9
622,000 4.
0
633,000 1
6
.
5
533,100
3
.4
P
ar
t
2
00
2
00
313,300 1
6
.
1
419,000 4.
6
407,000 2
0
.
9
318,000 4.
3
376,000 1
9
.
6
303,900
3
.
7
3/5/
14
6
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
The per
f
ormance standard AHRI
/
A
S
HRAE
/
I
SO
13256-2 became e
ff
ective Januar
y
1, 2000. This new standard has three ma
j
or cate
g
ories:
Water Loop,
G
round Water, and
G
round Loop.
U
nit o
f
Measure: The
C
ooling
CO
P
The coolin
g
e
ff
icienc
y
is measured in EER
(
U
S
version measured in Btuh per Watt. The Metric version is measured in a coolin
g
CO
P
(
Watt per Watt
)
similar to the traditional
CO
P measurement.
P
ump Power
C
orrection
C
alculation
Within each model, onl
y
one water
f
low rate is speci
f
ied
f
or all three
g
roups and pumpin
g
Watts are calculated usin
g
the
f
ollowin
g
f
ormula. This additional power is added onto the existin
g
power consumption.
• Pump power correction =
(g
pm x 0.0631
)
x
(
Press Drop x 2990
)
/
30
0
Where
‘g
pm’ is water
f
low in
g
pm and
‘
Press Drop’ is the pressure drop throu
g
h the unit heat exchan
g
er at rated water
f
low in
f
eet o
f
head
.
ISO
C
apacit
y
and E
ff
icienc
y
C
alculation
s
The
f
ollowin
g
equations illustrate coolin
g
calculations
:
• I
SO
C
oolin
g
C
apacit
y
=
C
oolin
g
C
apacit
y
(
Btuh
)
x 3.41
2
• I
SO
EER E
ff
icienc
y
(
W
/
W
)
= I
SO
C
oolin
g
C
apacit
y
(
Btuh
)
x 3.412
/
[Power Input
(
Watts
)
+ Pump Power
C
orrection
(
Watt
)
]
The
f
ollowin
g
equations illustrate heatin
g
calculations
:
• I
SO
Heatin
g
C
apacit
y
= Heatin
g
C
apacit
y
(
Btuh
)
x 3.41
2
• I
SO
CO
P E
ff
icienc
y
(
W
/
W
)
= I
SO
Heatin
g
C
apacit
y
(
Btuh
)
x 3.412
/
[Power Input
(
Watts
)
+ Pump Power
C
orrection
(
Watt
)
]
T
est Conditions
Performance Standard (AHRI/ISO/ASHRAE 13256-2)
()
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Conversions
Water Flow
(
lps
)
=
G
PM x 0.0631
Press Drop
(
Pascals
)
= Press Drop
(f
t hd
)
x 299
0
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
7
T
he R
W
Series
RWXW Features
D
ual scroll com
p
ressors
p
fo
r
eff
icienc
y
and reliabilit
y
H
H
ea
vy
gau
ge
i
nsulated sheet metal
c
abine
t
t
o
r
educe
no
i
se
Heav
y
g
au
g
e
ste
el
wel
ded
fra
me
to
re
duc
e
vi
b
r
a
ti
on
Small modular
desi
g
n
fo
r
app
lication
f
lexibili
ty
Hig
h efficie
ncy
b
razed
pl
ate heat
e
xchan
g
ers
fo
r
eff
icienc
y
and
c
ompact siz
e
Sta
inl
ess
st
eel
bi
-
dir
ect
ion
al
TXV
fo
r
p
recise superheat
con
tro
l
Full
y
insulated heat
e
xchan
ger
, r
efr
ige
rant
p
ipin
g
, and water lines
to
pre
vent condensation
at reduced
f
luid operatin
g
tem
per
atures
So
p
histicated
m
icro
p
rocessor
c
ontrol with r
obus
t
s
a
f
et
y
controls and
ad
v
a
n
ced
f
r
ee
z
e
de
t
ec
ti
o
n
Fork truck
p
ockets
fo
r
maneuverabilit
y
Factor
y
installed
f
used or non-fused
disconnec
t
t
o
i
so
l
a
t
e
e
lectrical suppl
y
Int
ern
al cla
ss
J
/
CC fusin
g
fo
r
p
rotection o
f
electrical
c
omponents
V
ibration absorbers
a
nd isolation loo
p
s
to miti
g
ate re
f
ri
g
erant
lea
k
s
due
t
o
vi
b
r
a
ti
on
Optional factor
y
i
nstalled
pr
essure
ga
u
ges
8
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
T
he RW Series cont
.
J
ohnson
C
ontrols is proud to announce the up
g
rade o
f
the RW
R
eversible
C
hiller
S
eries with premium e
ffi
cienc
y
, additional
s
a
f
et
y
f
eatures, improved serviceabilit
y
, in a compact
f
ootprint.
This product comes with new electrical
f
eatures such as a
l
ow volta
g
e emer
g
enc
y
stop button,
f
actor
y
mounted, internal
disconnect, and Intelli
S
tart. With internal,
fi
n
g
er-touch
f
usin
g
the RW
S
eries Reversible
C
hiller
S
eries is protected a
g
ainst
l
ar
g
e current
f
aults that ma
y
occur. The control panel was
desi
g
ned with the technician in mind b
y
dividin
g
hi
g
h and low
volta
g
e, a removable, hin
g
ed lockable service door, and plent
y
o
f
space
f
or installation and dia
g
nostics. Additional
f
eatures and
improvements are listed below
:
RW Series Reversible Chiller Hi
g
hli
g
hts
•
C
apacities ran
g
in
g
f
rom 120-600 MBtu
/
h outpu
t
•
C
omplete commercial volta
g
e selection o
f
208-230V
/
60Hz
/
3ph, 460
/
60
/
3, 575
/
60
/
3
•
O
versized brazed plate heat exchan
g
ers o
ff
er hi
g
h e
ffi
cienc
y
with industr
y
low waterside pressure dro
p
• True-dual brazed plate heat exchan
g
ers provide better part
l
oad e
ffi
ciencies compared to two sin
g
le-circuit evaporators
•
C
ompressor suction
/
dischar
g
e tubes come with braided
s
tainless steel vibration absorbers to dampen compressor
vibration on s
y
stem pipin
g
•
H
eav
y
g
au
g
e,
g
alvanized steel enclosure with hin
g
ed access
p
anels that can easil
y
be removed
f
or ease o
f
servic
e
• Fork pockets and li
f
tin
g
points in the
f
rame enable
maneuverabilit
y
f
or installation and shipmen
t
• Factor
y
installed pressure
/
temperature port externall
y
accessible
f
or improved serviceabilit
y
• Low-volta
g
e emer
g
enc
y
stop button disabl
e
c
ompressor operation
• Fin
g
er-touch sa
f
e power
f
uses provide circuit protection
• Primar
y
f
usin
g
to control trans
f
ormer to protect low volta
g
e
c
omponents
f
rom spikes in current
f
aul
t
•
R
u
gg
ed plu
g
assembl
y
wirin
g
harness provides a solid
y
et
s
erviceable connection
f
or control wirin
g
to the control panel.
•
S
hort circuit current ratin
g
up to 100kA with
f
used disconnect
and phase
g
uard optio
n
• Temperature setpoint control
Wide arra
y
o
f
standard
f
actor
y
installed options includin
g:
• Factor
y
mounted, internall
y
wired, rotar
y
-st
y
le,
no
n-
fused
d
i
sco
nn
ect
• 2 1
/
2” dial-t
y
pe re
f
ri
g
erant pressure
g
au
g
es
f
actor
y
mounted below the control panel aid the technician in
sy
stem dia
g
nostics
• FX10
C
ontrols with N2, LonWorks, BA
C
net,
or non-communicatin
g
• Intelli
S
tart reduces compressor in-rush current b
y
40
%
meanwhile reducin
g
mechanical shock on re
f
ri
g
erant
tubin
g
due to hi
g
h motor start-up torque
• Phase
g
uard monitor provides phase reversal, phase
imbalance, and loss o
f
phase protectio
n
9
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Cabine
t
All unit
f
rames are constructed o
f
heav
y
g
au
g
e steel channel and
p
ainted with a corrosion resistant black, pol
y
ester, powder coat
p
aint. The optional sheet metal cabinets are constructed o
f
heav
y
g
au
g
e
g
alvanized sheet steel painted with white, pol
y
ester, powder
c
oat paint rated at more than a 1,000 hours salt spra
y
ratin
g
. The
f
rame includes
f
ork truck access pockets in two dimensions and
l
i
f
tin
g
points
f
or eas
y
maneuverin
g
durin
g
installation and servicin
g
.
Com
p
ressors
R
eversible chillers use hi
g
h e
ff
icienc
y
R-410A, hermeticall
y
s
ealed, scroll compressors that are mounted on rubber
g
rommets
f
or vibration isolation.
S
croll compressors provide hi
g
h e
ff
icienc
y
while providin
g
g
reater tolerance to liquid re
f
ri
g
erant enterin
g
the
s
uction port.
V
ibration Absorbers
Vibration absorbers are
f
actor
y
installed
on ever
y
compressor suction and
dischar
g
e tube to dampen the vibrations
introduced b
y
compressor on the
r
e
f
ri
g
erant pipin
g
. These absorbers are
c
onstructed
f
rom corru
g
ated copper
tubin
g
wrapped with stainless steel wire
braid to provide stren
g
th and
f
lexibilit
y
.
E
lectrical Bo
x
U
nit controls
f
eature quick connect
wirin
g
harnesses
f
or eas
y
servicin
g
.
S
eparate knockouts
f
or low volta
g
e,
and two
f
or power on two sides
allow eas
y
access to the control
box. A lar
g
e 75VA trans
f
ormer
assures adequate control's power
f
or accessories. Flexible
J
ohnson
C
ontrols FX10 microprocessor
c
ontrol is included,
f
eaturin
g
several
innovations.
S
ee
C
ontrols section
fo
r m
o
r
e
in
fo
rm
a
ti
o
n.
Water Connections
All water line connections are Victaulic
g
rooved nipples
f
or ease
o
f
installation with optional connection kits. Factor
y
installed
thermistors are used on all water lines and can be viewed throu
g
h
the microprocessor inter
f
ace tool. Pressure ports are also added at
the
f
actor
y
f
or eas
y
service access.
Inside the RW Series
T
hermostatic Ex
p
ansion Valv
e
All r
e
v
e
r
s
i
b
l
e
c
hill
e
r
s
u
tiliz
e
ba
l
a
n
ced
p
ort, bi-directional, thermostatic
e
xpansion valves
(
TXV
)
f
or re
f
ri
g
erant
meterin
g
. These valves have
s
tainless steel capillar
y
tube and
bulb
f
or improved robustness over
c
onventional copper sensin
g
capillar
y
l
in
es
. Th
e
v
a
lv
e
co
n
s
i
s
t
s
of
a
l
ase
r-
welded power-head,
f
or
g
ed brass
valve bod
y
and diaphra
g
m optimized
f
or R-410A applications.
This valve desi
g
n allows precise re
f
ri
g
erant
f
low in a wide ran
g
e o
f
e
nterin
g
water variation
g
eothermal s
y
stems.
Water-to-Refri
g
erant Heat Exchan
g
er
Lar
g
e oversized stainless steel
interlaced copper-brazed plate
water-to-re
f
ri
g
erant heat exchan
g
ers
p
rovide unparalleled e
ff
icienc
y
. The
h
eat exchan
g
ers have common
water circuits with isolated re
f
ri
g
erant
c
ircuits so that in part load operation,
the
f
ull mass o
f
the heat exchan
g
er
is utilized. All heat exchan
g
ers are
p
ressure rated to 450 psi water
s
ide and 650 psi re
f
ri
g
erant side. All
h
eat exchan
g
ers, water lines, and
s
uction lines are insulated to prevent
c
ondensation durin
g
low temperature
inlet water operation.
Strainers
All r
e
v
e
r
s
i
b
l
e
c
hill
e
r
s
s
h
a
ll h
a
v
e
a
f
i
e
l
d
-in
s
t
a
ll
ed
s
trainer either Y-t
y
pe or basket t
y
pe.
S
trainers
s
hould be made o
f
a suitable bod
y
such as brass
with
3
1
6
stainless steel screens with a minimum
o
f
60
mesh.
WARNING: Warrant
y
is void if
strainers are not used on the
e
nterin
g
side of the load and source
.
Service Connections and Serviceabilit
y
Two
S
chrader service ports are provided
f
or
e
ach circuit on ever
y
unit. The suction side
and dischar
g
e side ports are
f
or
f
ield char
g
in
g
and servicin
g
access. All valves are 7
/
16”
S
AE connections.
1
0
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Flow Switch
A
f
low switch or equivalent must be installed on the evaporator
f
or
e
ach unit to be installed. I
f
the unit is to operate as both modes
(
heatin
g/
coolin
g)
, a
f
low switch is needed on both heat exchan
g
ers.
D
ifferential Pressure Switch
A di
ff
erential pressure switch can be used in place o
f
a
f
low switch.
The di
ff
erential switch must be capable o
f
pressure ran
g
e as
indicated in the pressure drop tables.
4
-Wa
y
Reversin
g
Valv
e
R
W units
f
eature a reliable all-brass pilot
operated re
f
ri
g
erant reversin
g
valve.
The reversin
g
valve operation is limited
to chan
g
e o
f
mode b
y
the control to
e
nhance reliabilit
y
.
V
ibration Isolation
U
nits are shipped with heav
y
dut
y
, durometer selected rubber
g
rommets to reduce sound that can be transmitted throu
g
h the
f
loor
via the
f
rame
(
see
g
rommets below
)
. For additional sound attenuation,
optional heav
y
dut
y
sprin
g
isolation can reduce sound levels b
y
3 dBA
(
see sprin
g
s below
)
can be purchased as an accessor
y
.
Cabine
t
All r
e
v
e
r
s
i
b
l
e
c
hill
e
r
f
r
a
m
es
a
r
e
co
n
s
tr
uc
t
ed
o
f
heav
y
g
au
g
e steel channel and painted
with corrosion resistant black, pol
y
ester,
p
ower coat paint. The
f
rame includes
f
ork
truck pockets and li
f
tin
g
points to assist
in maneuverabilit
y
o
f
the product durin
g
in
s
t
a
ll
a
ti
o
n. Th
e
r
e
v
e
r
s
i
b
l
e
c
hill
e
r
s
co
m
e
with
an enclosure that provides additional sound
attenuation, protection o
f
the electrical
and re
f
ri
g
eration s
y
stems, and makes the
p
roduct more aestheticall
y
pleasin
g
. The
e
nclosure is constructed o
f
heav
y
g
au
g
e
Inside the RW Series cont
.
G
rommets Standard
Heav
y
Dut
y
Mountin
g
Sprin
g
s Optional
I
S
-325-01
(
R120-360
)
I
S
-750-01
(
RW600
)
g
alvanized steel painted with
g
ra
y
textured, pol
y
ester, powder
c
oat paint rated at more than 1,000 hours salt spra
y
ratin
g
. The
e
nclosure includes heav
y
dut
y
hin
g
ed doors that can be easil
y
r
emoved
f
or improved serviceabilit
y
.
Control Panel
Re
v
e
r
s
i
b
l
e
c
hill
e
r
co
ntr
o
l
p
anel
f
eatures a heav
y
-
dut
y
, hin
g
ed service door
with
a
co
nv
e
ni
e
nt
use
r
inter
f
ace displa
y
f
or ease
of
se
rvi
ce
a
n
d
in
s
t
a
ll
a
ti
o
n.
The ke
y
ed service door
f
eatures a low volta
g
e
e
mer
g
enc
y
stop button
with an optional
f
actor
y
m
ou
nt
ed
d
i
sco
nn
ec
t
s
wit
c
h. Th
e
l
ef
t int
e
ri
o
r
of
the control panel
f
eatures
h
i
g
h volta
g
e components
suc
h
as
th
e
e
l
ec
tri
ca
l
disconnect,
f
uses, and
c
ompressor contactors.
The ri
g
ht interior o
f
the panel
f
eatures the FX10 main control
board, expansion board, control trans
f
ormer, and 24 VA
C
terminal
s
trip
f
or control wirin
g
. The control panel was desi
g
ned with the
technician in mind to provide convenient, clear wirin
g
with plent
y
o
f
workin
g
space.
E
lectrical Disconnec
t
A
f
actor
y
mounted, internall
y
wired, disconnect is available
to provide electrical isolation
f
rom hi
g
h volta
g
e suppl
y
at
the heat pump.
S
eparate
c
ircuit protection must be
f
ield
installed in the power wirin
g
and must compl
y
with National
Electric
C
ode
(
NE
C)
and
/
o
r l
oca
l
codes
. Di
sco
nn
ec
t
fea
t
u
r
es
in
c
l
ude
:
• Non-
f
used, rotar
y
d
i
sco
nn
ec
t wit
h
“
on
/
o
ff
” positio
n
• Door interlocked, external
p
istol handle keeps door
c
l
osed
wh
e
n
d
i
sco
nn
ect
i
s
“o
n
”
•
“
Lockout
/
Ta
g
out”
f
eature to
keep the unit
“
o
ff”
durin
g
servic
e
•
C
omplies with NE
C
Article 440-14
1
1
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Short Circuit Current Ratin
g
An optional
f
actor
y
mounted,
f
used disconnect provides the
s
ame bene
f
its as the non-
f
used version
y
et increases the short
c
ircuit current ratin
g
,
SCC
R to compl
y
with buildin
g
s with a hi
g
h
available
f
ault current. Addin
g
the
f
used disconnect option ensures
the equipment will compl
y
with NE
C
Article 409.
S
eparate circuit
p
rotection must be
f
ield installed in the power wirin
g
and must
c
ompl
y
with National Electric
C
ode
(
NE
C)
and
/
or local codes.
Di
sco
nn
ec
t
fea
t
u
r
es
in
c
l
ude
:
• Increases
SCC
R to 1
00
kA
• Door interlocked, external pistol handle keeps door closed
wh
e
n
d
i
sco
nn
ec
t i
s
“o
n
”
•
“
Lockout
/
Ta
g
out”
f
eature to keep the unit
“
o
ff”
durin
g
servic
e
•
C
omplies with NE
C
Article 440-14
•
C
omplies with NE
C
Article 409
f
or
S
hort
C
ircui
t
C
urrent Ratin
g
E
mer
g
enc
y
Stop
R
eversible chillers
f
eature a low-volta
g
e,
twist-release emer
g
enc
y
stop button that is
wired to the emer
g
enc
y
shutdown input on
the FX1
0
main control board. This
f
eature
e
nables the technician to immediatel
y
stop
operation o
f
the heat pump without shuttin
g
o
ff
the hi
g
h volta
g
e suppl
y
.
IntelliStar
t
The optional Intelli
S
tart three-
p
hase so
f
t starter will reduce
the normal start current
(
LRA
)
b
y
40
%
. Usin
g
Intelli
S
tart also
p
rovides a substantial reduction in
vibration, reduces startup noise,
and improves the compressor's
s
tart behavior.
(
Available on
R
W120-240, 460
/
60
/
3 units onl
y)
P
hase Guard
Factor
y
mounted phase
g
uard device is available to protec
t
the compressor a
g
ainst loss o
f
phase, reverse rotation, or
p
hase imbalance.
Com
p
ressor Protection Modul
e
M
odel size 600 come with external compressor protection module
that provides additional motor protection such as reverse phase
detection and a pre-wire thermistor. All other models have internal
overload protection without reverse phase detection.
Inside the RW Series cont
.
Fuses
Re
v
e
r
s
i
b
l
e
c
hill
e
r
s
co
m
e
with
n
on-indicatin
g
C
UBEFuse
which is a
f
in
g
er-sa
f
e,
time-dela
y
, power
f
use with
a small
f
ootprint,
C
lass
J
ratin
g
, and have hi
g
h
f
ault interruptin
g
ratin
g
.
CU
BEFuse includes dual-
e
l
e
m
e
nt
fuse
co
n
s
tr
uc
ti
o
n
th
a
t
ca
n with
s
t
a
n
d
inr
us
h
c
urrent
y
et still allow low let-
throu
g
h currents durin
g
a
f
ault condition.
1
2
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
FX10 Microprocessor and BAS S
y
ste
m
Standard Features
• Anti
S
hort
Cy
cl
e
•
H
i
g
h Pressure Protectio
n
•L
o
w Pr
essu
r
e
Pr
o
t
ec
ti
on
•Fr
ee
z
e
D
e
t
ec
ti
on
• Loss o
f
C
har
g
e Detectio
n
•
R
andom
S
tar
t
• Displa
y
f
or dia
g
nostics
•
R
eset Lockout at disconnect or throu
g
h BA
S
• 1 Accessor
y
outputs
•
O
ptional BA
S
add-on controls
•
C
ompressor Lead
/
La
g
• Temperature setpoint control
D
DC O
p
eration & Connection
O
ther optional network protocol boards that can be added to the
FX1
0
are
:
•
J
ohnson
C
ontrol N
2
•L
o
nW
o
rk
s
•BA
C
ne
t
- M
S/
TP
@
19,200 Baud rat
e
- Limit devices to 30 on a sin
g
le trunk line.
Control and Safet
y
Feature Details
E
mer
g
enc
y
Shutdown
The emer
g
enc
y
shutdown mode can be activated b
y
a command
f
rom a
f
acilit
y
mana
g
ement s
y
stem or a closed contact on BI-2.
The de
f
ault state
f
or the emer
g
enc
y
shutdown data point is o
ff
.
When the emer
g
enc
y
shutdown mode is activated, all outputs will
be turned o
ff
immediatel
y
and will remain o
ff
until the emer
g
enc
y
s
hutdown mode is de-activated. The
fi
rst time the compressor
s
tarts a
f
ter the emer
g
enc
y
shutdown mode has been de-activated,
there will be a random start dela
y
present.
L
ockout Mod
e
Lockout mode can be activated b
y
an
y
o
f
the
f
ollowin
g
f
ault
s
i
g
nals: re
f
ri
g
erant s
y
stem hi
g
h pressure, re
f
ri
g
erant s
y
stem
l
ow pressure, heatin
g
f
reeze detection, coolin
g
f
reeze detection,
and compressor current sensor.
When an
y
valid
f
ault si
g
nal
r
emains continuousl
y
active
f
or the len
g
th o
f
its reco
g
nition dela
y
,
the controller will
g
o into
f
ault retr
y
mode, which will turn o
ff
both compressors. A
f
ter the compressor short c
y
cle dela
y
, the
c
ompressors will attempt to operate once a
g
ain. I
f
three consecutive
f
aults occur in 60 minutes, the unit will
g
o into lockout mode, turnin
g
o
ff
the compressor
(
s
)
, enablin
g
the alarm output until the controller
is reset. I
f
the control
f
aults due to the low pressure input bein
g
open durin
g
the pre-compressor startup check, the control will
g
o
into lockout mode immediatel
y
, disablin
g
the compressors
f
rom
s
tartin
g
and enablin
g
the alarm output. The lockout condition can be
r
eset b
y
powerin
g
down the controller, b
y
a command
f
rom the BA
S
,
or b
y
the holdin
g
the E
SC
and Return ke
y
s on the user inter
f
ace
f
or
5
seconds. N
O
TE:
S
ee freeze detection section for more detail.
Controls - FX10
M
ai
n
n
FX 10 Boa
rd
D
ispla
y
(
Medium User Interface - MUI
)
O
ne local displa
y
is standard on all units. Up to 2 displa
y
s, either 1
l
ocal and 1 remote, or 2 remote.
(
A 2-displa
y
con
fi
g
uration requires
identical displa
y
s.
)
Local displa
y
can be up to 3 meters from the
c
ontroller, power suppl
y
, and data communication. Remote displa
y
c
an be up to 300 meters
f
rom the controller. Remote displa
y
must
be independentl
y
powered with data communication done via 3
p
ole shielded cable.
Control Timin
g
& Fault Reco
g
nition Dela
y
s
Lead compressor
“O
N” dela
y
.........................................
90
seconds
M
inimum compressor
“O
N” tim
e
........................................
5
minutes
(
except
f
or
f
ault condition
)
S
hort c
y
cle dela
y
...............................................................
5
minutes
R
andom start dela
y
...................................................
0
-12
0
seconds
H
i
g
h pressure
f
aul
t
...........................................................
<
1
seco
n
d
Low pressure
f
aul
t
..........................................................
30
seconds
Fr
ee
z
e
de
t
ec
ti
o
n
fau
l
t
..................................................
0
-
30
seconds
Low pressure
f
ault b
y
pass
.................................................
2 min
u
t
es
1
3
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Controls - FX10 cont
.
Reversible Chiller Advanced Freeze
D
etection S
y
ste
m
The reversible chiller source and load heat exchan
g
ers are
p
rotected b
y
a multi-sourced temperature lo
g
ic strate
gy
. The
temperature lo
g
ic is based upon the re
f
ri
g
erant temperature
s
ensed as the re
f
ri
g
erant is about to enter the heat exchan
g
er;
while enterin
g
and leavin
g
water temperatures are bein
g
used as
c
orrelatin
g
f
actors. The detection scheme is shown as basic and
advanced al
g
orithms.
Basic Freeze Detection O
p
eration: “Com
p
1 or Com
p
2
Freeze” Alar
m
This alarm can be tri
gg
ered b
y
one o
f
two detection schemes.
Hard Limit Freeze Detection
I
f
the re
f
ri
g
erant temperature drops below the
f
reeze detection
s
etpoint b
y
1.8
°
F, the associated compressor is locked out
immediatel
y
re
g
ardless o
f
an
y
other
f
actors and requires a
m
a
n
ua
l r
ese
t. NOTE: This Lockout
p
roduces a “Com
p
1 or
Comp 2 Freeze” error on the MUI displa
y.
Freeze Detection
The re
f
ri
g
erant temperature is compared to the
f
reeze detection
s
etpoint
(
15
°
F [anti
f
reeze] or 33
°
F [water]
f
ield selectable
)
, and
i
f
the temperature
f
alls below the setpoint
f
or 30 continuous
s
econds, the associated compressor will be halted. This
fu
n
c
ti
o
n
beco
m
es
e
n
ab
l
ed
af
t
e
r th
e
f
ir
s
t tw
o
min
u
t
es
of
c
ompressor operation. Three such events in 60 minutes will
tri
gg
er a compressor lockout that requires a manual reset.
NOTE: This Lockout
p
roduces a “Com
p
1 or Com
p
2
Freeze” error on the MUI displa
y.
In addition to the above:
Entering Water Temperature In
f
luence
I
f
the enterin
g
water temperature o
f
the evaporative heat
e
xchan
g
er is within 10
°
F o
f
the
f
reeze setpoint, the previousl
y
mentioned two minute dela
y
will be eliminated. This allows the
f
reeze detection to operate immediatel
y
when the compressor
s
tarts based on enterin
g
water temperature.
Leaving Water Temperature Influenc
e
I
f
the leavin
g
water temperature o
f
the evaporative heat
e
xchan
g
er is within 10
°
F o
f
the
f
reeze setpoint, the previousl
y
mentioned 30 second dela
y
will be
g
in to be proportionatel
y
r
educed, endin
g
at a 1 second dela
y
when the leavin
g
water
temperature is 1.5
°
F above the
f
reeze setpoint.
Dua
l
Circuite
d
Heat Exc
h
an
g
er Protectio
n
A low temperature condition on either re
f
ri
g
erant circuit will
p
revent the start o
f
both compressors. I
f
the low temperature
c
ondition exists
f
or 5 minutes when both compressors are
o
ff
, a lockout is tri
gg
ered
f
or both compressors. However,
i
f
f
or instance both compressors are operatin
g
and circuit
1 experiences a re
f
ri
g
erant temperature below the
f
reeze
detection setpoint such that compressor 1 is halted,
c
ompressor 2 will not be halted as a result.
Advanced Freeze Detection O
p
eration
:
“
Pre Freeze” Alar
m
P
redictive freeze condition detection
:
I
f
the re
f
ri
g
erant temperature is within 7.2
°
F o
f
the
f
reeze
detection setpoint, the predictive
f
reeze detection al
g
orithm is
e
nabled, and i
f
the lo
g
ic determines that a
f
reeze condition is
l
ikel
y
to happen based on current conditions, the compressor o
f
the involved re
f
ri
g
erant circuit is immediatel
y
stopped. Three
(
3
)
s
uch events in 60 minutes will tri
gg
er a compressor lockout that
requires a manual reset. In the absence o
f
such a condition,
the compressor is allowed to operate so that the re
f
ri
g
erant
temperature ma
y
eventuall
y
be at the threshold o
f
the
f
reeze
detection setpoint. NOTE: This Lockout
p
roduces a “Pre
Freeze” detection error on the MUI displa
y.
Capacit
y
Limitin
g
I
f
the leavin
g
water temperature drops to 1.8
°
F above the
f
reeze detection setpoint, the lead compressor is halted. When
the leavin
g
water temperature rises to 3.6
°
F above the
f
reeze
detection setpoint, it will be allowed to resume operation.
This limitin
g
is allowed to repeat inde
f
initel
y
with no lockout or
indication on the displa
y
.
I
f
the leavin
g
water temperature drops to the
f
reeze detection
s
etpoint, the la
g
compressor is halted. When the leavin
g
water
temperature rises to 1.8
°
F above the
f
reeze detection setpoint, it will
be allowed to resume operation. This limitin
g
is allowed to repeat
inde
f
initel
y
with no lockout or indication on the displa
y
.
Hi
g
h Pressur
e
The hi
g
h-pressure switch shall be a normall
y
closed
(
N
C)
switch
that monitors the s
y
stems re
f
ri
g
erant pressure. I
f
the input senses
the hi
g
h-pressure switch is open it must disable the compressor
output immediatel
y
and count the
f
ault. The compressor minimum
on time does not appl
y
i
f
the hi
g
h-pressure switch opens. The
c
ompressor will not restart until the compressor short c
y
cle time
dela
y
has been satis
f
ied.
L
ow Pressur
e
The low-pressure switch shall be a normall
y
closed
(
N
C)
switch
that monitors the s
y
stems re
f
ri
g
erant pressure. The input 15
s
econds be
f
ore compressor start up and then i
g
nored
f
or the
f
irst
2 minutes a
f
ter the compressor output
(
B
O
-2
)
is enabled. I
f
the
s
witch is open continuousl
y
f
or 30 seconds durin
g
compressor
14
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Controls - FX10 cont
.
operation the compressor output
(
B
O
-2
)
will be disabled. The
c
ompressor will not restart until the compressor short c
y
cle time
dela
y
has been satis
f
ied.
A
larm Out
p
uts
The control has two alarm outputs, one
f
or each compressor circuit.
These 24VA
C
outputs are desi
g
nated as L
C
1
(
compressor 1
)
and
L
C
2
(
compressor2
)
on the low volta
g
e terminal board.
T
est Mod
e
B
y
holdin
g
the E
SC
and down arrow ke
y
s on the MUI
f
or 5 seconds
will put the control into test mode. In test mode the random start
dela
y
and the compressor
f
ixed on dela
y
time will both be shortened
to 5 seconds and the reversin
g
valve will be allowed to c
y
cle with
out shuttin
g
down the compressor. I
f
an MUI is connected to the
c
ontrol LED
8
will
f
lash and the words
“
Test Mode Enabled” will be
s
hown on the L
C
D displa
y
when the control is in test mode. Test
mode will be disabled a
f
ter a power c
y
cle, 30 minute timeout, or b
y
h
oldin
g
the E
SC
and Up arrow ke
y
s on the MUI.
Se
q
uence of O
p
eration
P
ower Fail Restar
t
When the controller is
f
irst powered up, the outputs will be
disabled
f
or a random start dela
y
. The dela
y
is provided to prevent
s
imultaneous startin
g
o
f
multiple heat pumps.
O
nce the timer
e
xpires, the controller will operate normall
y
.
Random Start Dela
y
This dela
y
will be used a
f
ter ever
y
power
f
ailure, as well as the
f
irst
time the compressor is started a
f
ter the control exits the unoccupied
mode or the emer
g
enc
y
shutdown mode. The dela
y
should not be
l
ess than 1 second and not lon
g
er than 120 seconds. I
f
the control is
in test mode the random start dela
y
will be shortened to 5 seconds.
L
ead Compressor Start Dela
y
Tim
e
The Lead
C
ompressor Fixed
O
n Dela
y
Time will ensure that
the lead compressor output is not enabled
f
or 90 seconds a
f
ter
the control receives a call to start the compressor. This dela
y
is
ad
j
ustable
f
rom 30 – 300 seconds over a BA
S
or a MUI. I
f
the
c
ontrol is in test mode the Lead
C
ompressor
S
tart Dela
y
Timer will
be shortened to
5
seconds.
L
a
g
Compressor Start Dela
y
Tim
e
The La
g
C
ompressor Fixed
O
n Dela
y
Time will ensure that the la
g
c
ompressor output is not enabled
f
or 90 seconds a
f
ter the control
r
eceives a call to start the compressor. This dela
y
is ad
j
ustable
f
rom
30
–
300
seconds over a BA
S
or a M
U
I. I
f
the control is in test
mode the La
g
C
ompressor
S
tart Dela
y
Timer will be shortened to
5
seconds.
Compressor Minimum On Dela
y
The compressor minimum on dela
y
will ensure that the compressor
output is enabled
f
or a minimum o
f
f
ive
(
5
)
minutes each time the
c
ompressor output is enabled. This will appl
y
in ever
y
instance
e
xcept in the event the hi
g
h pressure switch is tripped,
f
reeze
p
rotection, or emer
g
enc
y
shutdown then the compressor output will
be disable immediatel
y
.
Compressor Minimum Off Dela
y
Tim
e
The compressor minimum o
ff
time dela
y
will ensure that the
c
ompressor output will not be enabled
f
or a minimum o
f
f
ive
(
5
)
m
inutes a
f
ter it is disabled. This allows
f
or the s
y
stem re
f
ri
g
erant
p
ressures to equalize a
f
ter the compressor is disabled.
Compressor Lead/La
g
C
ompressor lead
/
la
g
is a standard part o
f
the FX10 control s
y
stem.
The unit is shipped
f
rom the
f
actor
y
with lead
/
la
g
enabled. Lead
/
la
g
c
an be activated throu
g
h the unit mounted user inter
f
ace.
Heatin
g
C
y
cl
e
The control will run the unit in heatin
g
mode when there is a
c
ommand on the
O/
B terminal on the terminal board.
Coolin
g
C
y
cl
e
The control will run the unit in coolin
g
mode when there is no
c
ommand on the
O/
B terminal on the terminal board.
M
UI Alarm Histor
y
Reportin
g
I
f
a
f
ault occurs the
f
ault will be recorded in histor
y
f
or displa
y
on
the medium user inter
f
ace in the Histor
y
Menu. Each
f
ault t
y
pe will
be displa
y
ed in the histor
y
menu with a number between 0 and 3.
A readin
g
o
f
3+ will mean that
f
ault has occurred more than three
times in the past. The histor
y
menu can be cleared with a power
cy
cle onl
y
. Alarm date and time are not included in the histor
y
.
1
5
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Inputs and Outputs Confi
g
uration
Field Selectable O
p
tions
L
oad and Source Freeze Detection Set
p
oin
t
The
f
reeze detection setpoint input allows
y
ou to ad
j
ust the
f
reeze detection setpoint
f
or either the load or source sides o
f
the heat pump. When the
j
umper is installed on BI-5 the load
f
reeze detection setpoint is
f
actor
y
set
f
or 30
°
F. When the
j
umper
on BI-5 is removed the load
f
reeze detection setpoint will be
15
°
F. When the
j
umper is installed on BI-4 the source
f
reeze
detection setpoint is
f
actor
y
set
f
or 30
°
F. When the
j
umper on
BI-4 is removed the source
f
reeze detection setpoint will be 15
°
F.
NOTE: Pipin
g
circuit must be antifreeze protected to the set
l
evels or the warrant
y
will be voided
.
A
ccessor
y
Outpu
t
The Accessor
y
O
utput will be ener
g
ized 90 seconds prior to the
l
ead compressor output bein
g
ener
g
ized. When both compressor
outputs are turned o
ff
the accessor
y
output will be deactivated
immediatel
y
. This output is selectable
f
or normall
y
open or
n
ormall
y
closed operation throu
g
h the Medium User Inter
f
ace or
throu
g
h the Buildin
g
Automation
Sy
stem.
Controls - FX10 cont
.
Reversible Chiller Set
p
oint Control
This control so
f
tware is b
y
de
f
ault set to operate in
‘
Aquastat’
mode, which requires external setpoint lo
g
ic to
g
enerate the Y1
or Y2 call. The mode ma
y
be chan
g
ed to
‘S
etpoint’ b
y
use o
f
the
‘S
ettin
g
s’ menu in the MUI in the
‘
Mode’ item which is on the 5th
l
ine
f
rom the top.
CAUTION! Set
p
oint mode is not recommended on
app
lications that have more than two water-to-water
heat pumps installed. Unique temperature settin
g
should be set for each unit on a common load
.
To operate in setpoint mode, consider the
f
ollowin
g:
• The selected mode must be chan
g
ed
f
rom Aquasta
t
to
S
etpoin
t
• The
‘
Y1’ input must be activated. This ma
y
be done b
y
c
onnectin
g
‘
R’ to
‘
Y1’ on the terminal board, or b
y
commandin
g
Y1 to
‘O
N’ in the Maint menu o
f
the MUI, or b
y
commandin
g
the
C
omprEnable network variable
f
rom the BA
S
.
• The Heat
/C
ool mode is b
y
de
f
ault in the coolin
g
mode, and
ma
y
be set to heatin
g
b
y
connectin
g
R to
O/
B on the terminal
board, or b
y
commandin
g
the
‘
B’ item in the Maint menu o
f
the
M
UI, or b
y
commandin
g
the reversin
g
valve variable
f
rom the
BA
S
network.
• The setpoint mode temperature sensor can be selected to
e
ither Load LW Temp
(
Leavin
g
Water
)
or Load EW Temp
(
Enterin
g
Water Temp
)
. The de
f
ault is set
f
or Enterin
g
Water
Temp control.
• The coolin
g
setpoint and the heatin
g
setpoint are two separate
s
etpoints, and can be ad
j
usted in the MUI
S
ettin
g
s menu
.
• When the controllin
g
temperature sensor is set to select the
Load EW Temp, the setpoint control will operate in a PID
(
Proportional-Inte
g
ratin
g
-Derivative
)
mode. In this mode,
the temperature rate o
f
chan
g
e and direction o
f
chan
g
e will
be part o
f
decidin
g
whether or not to add or reduce capacit
y
.
Additionall
y
the amount o
f
di
ff
erence between setpoint and
temperature AND the len
g
th o
f
time that the di
ff
erence existed
are used to determine i
f
addin
g
or reducin
g
capacit
y
is needed
.
o The tunin
g
parameters
f
or this mode should onl
y
be
ad
j
usted i
f
y
ou know wh
y
y
ou are choosin
g
the value that
y
ou plan to use. You should keep a permanent record o
f
the be
g
innin
g
values and record an
y
chan
g
es that
y
ou
make. The parameters used in PID operation and their
(
de
f
ault values
)
are
:
• D Ne
g
Thrshld
(
-0.03
)
• Int Rate
(
200
)
•
S
ta
g
e Dela
y
(
30
)
•
G
ain
(
2
)
• D PosThrshld
(
0.04
)
• PIDY1 Re
f
(
7.2
)
• PID Y1 Di
ff
(
7
)
• PID Y2Re
fS
hi
f
t
(
5
)
• PID Y2 Di
ff
(
6
)
• When the controllin
g
temperature sensor is set to select the
Load LW Temp, the setpoint control will operate strictl
y
in
a proportional mode with o
ff
sets and di
ff
erentials used to
determine the appropriate capacit
y
to use. In this mode, the
f
ollowin
g
parameters are used
:
•
S
ta
g
e Dela
y
(
30
)
•
G
ain
(
2
)
• PIDY1 Re
f
(
7.2
)
• PID Y1 Di
ff
(
7
)
• PID Y2Re
fS
hi
f
t
(
5
)
• PID Y2 Di
ff
(
6
)
•Th
e
defau
lt v
a
l
ues
w
e
r
e
used
in th
e
t
es
t l
ab
a
n
d
see
m t
o
be
a reasonabl
y
g
ood be
g
innin
g
point
f
or parameter settin
g
s.
Control Accessories
• A
99
S
ensor
•
M
UI
(
L
C
D User inter
f
ace
)
f
or dia
g
nostics
and commissionin
g
•
M
UIK3 - Panel Mount, Portabl
e
•
MU
IK4 - Wall Moun
t
1
6
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
RW Application Data
pp
1.0. Minimum Fluid Volum
e
A. Water-to-water heat pumps require a minimum amount o
f
sou
r
ce
a
n
d
l
oad
s
i
de
fl
u
i
d
v
o
l
u
m
e
t
o
e
n
su
r
e
accu
r
a
t
e
a
n
d
s
table temperatures durin
g
s
y
stem operation. For normal air
c
onditionin
g
t
y
pe applications, it is recommended to use at
l
east 7
g
allons
/
ton.
B.
Applications that require more precise temperature control or
l
ow loadin
g
will occur the minimum
fl
uid volume shall be no
l
ess than 10
g
allons
/
ton. Installation o
f
a bu
ff
er tank that will
p
roperl
y
mix the
fl
uid is recommended.
1.1. Water-to-Water Heat Pump Sizin
g
A.
H
eat pumps should be adequatel
y
sized
f
or optimal
sy
stem e
ffi
cienc
y
and run time.
O
versizin
g
b
y
more than
15
%
can diminish per
f
ormance resultin
g
in hi
g
her power
c
onsumption, short c
y
clin
g
o
f
compressors, and unstable
c
onditionin
g
temperatures.
B.
In applications where the minimum load is si
g
ni
fi
cantl
y
less
than the desi
g
n condition, it is better to install 2 smaller heat
p
umps
f
or load matchin
g
rather than a sin
g
le lar
g
e heat pump.
1.2. Heat Pump Pipin
g
A. Multiple heat pumps can be installed in series or parallel
c
on
fi
g
urations. The pre
f
erred s
y
stem desi
g
n is to pipe the
e
quipment in parallel due to its simplicit
y
and
fl
exibilit
y
. In
p
arallel s
y
stems, the heat pump equipment can var
y
in size
as lon
g
as
fl
ow rate and s
y
stem volume are accounted
f
or.
B. Pipin
g
equipment in series is not desired; however, it can
be done i
f
proper
g
uidelines are
f
ollowed. Alwa
y
s observe
p
roper temperature and
fl
ow rate requirements
f
or each
u
nit.
S
ometimes this method is desired to achieve lar
g
er
temperature di
ff
erences.
1.3. Strainers
A. All brazed-plate heat exchan
g
ers shall have a strainer within
8
f
t o
f
the water
/
brine inlet. It is hi
g
hl
y
recommended to use a
minimum o
f
60 mesh in order to provide maximum
fi
ltration.
In an
y
case, the strainers should never have a mesh size less
than 2
0
.
B. Failure to install proper stainers and per
f
orm re
g
ular service
c
an result in serious dama
g
e to the unit, and cause de
g
raded
p
er
f
ormance, reduced operatin
g
li
f
e and
f
ailed compressors.
Improper installation o
f
the unit
(
which includes not havin
g
p
roper strainers to protect the heat exchan
g
ers
)
can also
r
esult in voidin
g
the warrant
y
.
C
.
S
trainers should be selected on the basis o
f
acceptable
p
ressure drop, and not on pipe diameter. The strainers
s
elected should have a pressure drop at the nominal
fl
ow rate
o
f
the units; low enou
g
h to be within the pumpin
g
capacit
y
o
f
the pump bein
g
used.
1.4. Flow Sensin
g
Devices
A. A
fl
ow switch or equivalent must be installed on the
e
vaporator
f
or each unit to be installed. I
f
the unit is to operate
as both modes
(
heatin
g/
coolin
g)
, a
fl
ow switch is needed on
both heat exchan
g
ers.
B. A di
ff
erential pressure switch can be used in place o
f
a
fl
ow
s
witch. The di
ff
erential switch must be capable o
f
pressure
ran
g
e as indicated in the pressure drop tables.
1.5. Water Qualit
y
A.
G
eneral
:
Reversible chiller s
y
stems ma
y
be success
f
ull
y
applied in a wide ran
g
e o
f
commercial and industrial
applications. It is the responsibilit
y
o
f
the s
y
stem desi
g
ner
and installin
g
contractor to ensure that acceptable water
q
ualit
y
is present and that all applicable codes have been
me
t in th
ese
in
s
t
a
ll
a
ti
o
n
s
.
B. Water Treatment: Do not use untreated or improperl
y
treated
water. Equipment dama
g
e ma
y
occur. The use o
f
improperl
y
treated or untreated water in this equipment ma
y
result in
s
calin
g
, erosion, corrosion, al
g
ae or slime. The services o
f
a quali
fi
ed water treatment specialist should be en
g
a
g
ed to
determine what treatment, i
f
an
y
, is required. The product
warrant
y
speci
fi
call
y
excludes liabilit
y
f
or corrosion, erosion or
deterioration o
f
equipment.
The heat exchan
g
ers in the units are 316 stainless steel
p
lates with copper brazin
g
. The water pipin
g
in the heat
e
xchan
g
er is steel. There ma
y
be other materials in the
buildin
g’
s pipin
g
s
y
stem that the desi
g
ner ma
y
need to take
into consideration when decidin
g
the parameters o
f
the
water qualit
y
.
I
f
an anti
f
reeze or water treatment solution is to be used, the
desi
g
ner should con
fi
rm it does not have a detrimental e
ff
ect
on the materials in the s
y
stem.
C
. Contaminated Water
:
In applications where the water qualit
y
c
annot be held to prescribed limits, the use o
f
a secondar
y
or
intermediate heat exchan
g
er is recommended to separate the
u
nit
f
r
o
m th
e
co
nt
a
min
a
t
ed
w
a
t
e
r.
The
f
ollowin
g
table outlines the water qualit
y
g
uidelines
f
or unit
h
eat exchan
g
ers. I
f
these conditions are exceeded, a secondar
y
h
eat exchan
g
er is required. Failure to suppl
y
a secondar
y
heat
e
xchan
g
er where needed will result in a warrant
y
exclusion
f
or
p
rimar
y
heat exchan
g
er corrosion or
f
ailure.
WARNING: Must have intermediate heat exchan
g
er
when used in
p
ool a
pp
lications
.
1
7
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
1.6. Insulation
A. Heat pumps are built with
f
actor
y
installed insulation on an
y
s
ur
f
ace that ma
y
be sub
j
ect to temperatures below the room
dew point.
1.7. Brine A
pp
lications
A. Applications where the leavin
g
fl
uid temperature
g
oes below
4
0°
F a suitable brine solution must be used. Failure to do
s
o can cause immediate dama
g
e to the s
y
stem. The brine
must be approved
f
or use with heat exchan
g
ers. Automotive
anti
f
reeze solutions are not suitable
f
or use in brazed plate
h
eat exchan
g
ers.
B.
The
f
reeze detection must be ad
j
usted appropriatel
y
f
or
brine applications. The brine solution concentration should
be at least 15
°
F below the lowest leavin
g
fl
uid temperature.
Water Qualit
y
Guidelines
RW Application Data cont.
pp
Surface Condensation Char
t
R
oom Ambient
C
ondition
S
ur
f
ace Temperature
50°
F
35°
F
0°
F
Normal
(
Max 85
°
F, 70
%
RH
)
1
/
2"
3/
4"
1
"
M
ild
(
Max 80
°
F, 50
%
RH
)
1
/8
"
1/
4"
1/
2"
S
evere
(
Max 90
°
F, 80
%
RH
)
3/
4"
1
"
2
"
M
a
t
e
ria
l
3
16
S
tainl
e
s
s
S
t
e
el
pH
p
A
c
idi
t
y
y
/
y
y
Al
/
/
k
a
linit
y
y
7 -
9
Scalin
g
C
alcium an
d
M
a
g
nesium
C
arbo
n
g
a
t
e
(
T
otal Ha
TT
r
dne
r
s
s
)
le
s
s
th
a
n
3
5
0
pp
m
pp
C
or
r
osion
H
y
d
r
ogen Sulfide
r
L
e
s
s
than 1 ppm
S
ul
f
a
f
f
t
es
L
e
s
s
than 200 ppm
C
hlorin
e
L
e
s
s
th
a
n
0
.
5 ppm
C
hlorides
L
e
s
s
than 300 ppm
C
arbon D
i
o
xi
de
10 - 50 ppm
A
mm
o
ni
a
L
e
s
s
than 20 ppm
A
mmonia
C
hlorid
e
L
e
s
s
th
a
n
0
.
5 ppm
Amm
o
ni
a
Ni
t
r
a
rr
t
e
L
e
s
s
th
a
n
0
.
5 ppm
Amm
o
ni
a
H
y
d
r
o
r
xi
de
L
e
s
s
th
a
n
0
.
5 ppm
A
mmonia
S
ul
f
a
f
f
t
e
L
e
s
s
th
a
n
0
.
5 ppm
T
otal Di
TT
s
so
lv
e
d
S
olids
(T
D
S)
1000 - 1500 ppm
L
S
I In
d
e
x
+
0
.5
t
o
-
0
.5
I
r
on
Foulin
g
(
Biolo
g
ical
G
r
o
wth
)
I
r
on, FE
r
2
+
(
F
er
r
ou
rr
s
)
B
ac
t
e
ri
a
l
I
r
on
r
r
P
o
t
e
nti
a
l
<
0
.
2 ppm
I
r
on
r
O
xi
de
L
e
s
s
than 1 ppm, a
b
o
v
e
thi
s
l
e
v
e
l de
p
osition will
o
p
c
cur
E
r
osion
S
uspended
S
olids
L
e
s
s
than 10 ppm and
f
il
t
e
r
ed
f
or max. of 600 mic
f
f
r
on si
r
z
e
T
h
r
es
h
o
l
d
V
elocity
VV
(
F
(
r
es
h
W
a
W
W
t
e
r
)
)
<
6
ft
/
sec
/
/
N
O
T
ES
:
G
r
ains = ppm divided
rr
b
y
1
7
m
g/
L is equ
i
v
a
l
e
nt
t
o
ppm
2
/
2
2
/
1
2
1
8
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
RW Selection Process
To achieve optimal per
f
ormance, proper selection o
f
each heat
p
ump is essential. The easiest and most accurate method to
s
ize and select heat pump equipment is to use Johnson
C
ontrols
IPE selection pro
g
ram.
S
peci
fi
c desi
g
n in
f
ormation such as
temperatures, volta
g
es, and
fl
ow requirements are entered directl
y
into the pro
g
ram so that the correct heat pump is chosen.
Notes before selections
:
• For applications usin
g
water, the leavin
g
water temperature
must sta
y
above 40
°
F.
• I
f
leavin
g
water temperature below 40
°
F is desired, the desi
g
n
m
us
t in
c
l
ude
a
su
it
ab
l
e
b
rin
e
so
l
u
ti
o
n.
• Water
/
Brine
fl
ow rates must meet the minimum and maximum
c
riteria as established in the en
g
ineerin
g
data
.
• Water qualit
y
must compl
y
with data presented in
e
n
g
ineerin
g
documentation.
•
C
ontact
f
actor
y
f
or applications requirin
g
load temperatures
below
3
2
°
F
RW Typical Piping
yp p g
1
9
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
RW Typical Piping, cont.
yp p g,
FS
Brazed Plate
Heat Exchanger
Isolation Valves
Isolation Valve
Strainer
Pump
From Load
To Load
Water
Temperature
Sensors
Field Supplied and InstalledFactory Installed
1/4” NPT
Pressure/Temperature
Port
Pressure Actuated
Water Valve
Compressor
Discharge
Pressure
FS
Brazed Plate
Heat Exchanger
Isolation Valves
Isolation Valve
Strainer
Pump
From Load
To Load
Water
Temperature
Sensors
Field Supplied and InstalledFactory Installed
1/4” NPT
Pressure/Temperature
Port
Standard Pipin
g
P
ressure Re
g
ulated Pipin
g
Note:
Sy
stem pipin
g
should have drain ports to enable
f
lushin
g
and cleanin
g
o
f
heat exchan
g
ers.
O
n s
y
stems utilizin
g
pumps with
VFDs, an automatic
f
low control valve must be installed.
Note:
Sy
stem pipin
g
should have drain ports to enable
f
lushin
g
and cleanin
g
o
f
heat exchan
g
ers.
O
n s
y
stems utilizin
g
pumps with
VFDs, an automatic
f
low control valve must be installed.
2
0
R
W
S
ERIE
S
REVER
S
IBLE
C
HILLER
S
PE
C
IFI
C
ATI
O
N
C
ATAL
OG
Physical Dimensions
y
"A"
"B"
"H"
"D"
"E"
"F"
"G"
"C"
SOURCE
WATER OUT
SOURCE
WATER IN
LOAD
WATER IN
LOAD
WATER OUT
7.00
4.50
4.00
4.50
7.50
ELECTRICAL
HIGH VOLTAGE
ELECTRICAL
LOW VOLTAGE
J
2.40
TO PORT
(SERVICE)
REARSIDE
FRONT
TOP
SOURCE
WATER OUT
SOURCE
WATER IN
LOAD
WATER IN
LOAD
WATER OUT
CONTROL BOX COVER
MAIN POWER CONNECTION
VIBRATION PADS
ACCESS DOOR
DISCONNECT SWITCH
EMERGENCY STOP SWITCH
FX-10
CONTROLLER
DISPLAY
NOTES:
1. DO NOT SCALE DRAWING.
SIDE ACCESS
PANEL DOORS
SERVICE PORTS
M
odel
A
B
C
D
E
F
G
H
J
120-180
5
7.
3
[
1455]
24.
1
[
612]
42.
5
[
1080]
5
.
0
[
127]
17.
0
[
432]
8
.
8
[
224]
17.
0
[
432]
11.
9
[
302]
4.
6
[
117]
2
40-360
6
4.
2
[
1631]
24.
1
[
612]
50
.
5
[
1283]
6
.
9
[
175]
17.
0
[
432]
1
3
.
9
[
353]
17.
0
[
432]
12.
1
[
307]
3
.
6
[
91]
600
71.
1
[
1806]
24.
0
[
610]
58
.
5
[
1486]
6
.
5
[
165]
17.
0
[
432]
1
9
.
5
[
495]
17.
0
[
432]
1
5
.
0
[
381]
3
.
2
[
81]
All dimensions in inches, [mm]
5/
12
/
14
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Johnson Controls RW SERIES Engineering Manual

Johnson Controls
Brand
Johnson Controls
Model
RW SERIES
Category
Heat pumps
Type
Engineering Manual
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