HW-408-A
Water Heating &
Water Temperature
Control
• Feed-Forward
• Digital
Table of Contents
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Flo-Rite-Temp® Instantaneous Water Heater Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 7
Flo-Rite-Temp® Instantaneous Water Heater - Single Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 9
Flo-Rite-Temp® Instantaneous Water Heater - Double Wall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Flo-Rite-Temp® Instantaneous Water Heater - Sizing Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Flo-Rite-Temp® Stainless Steel Instantaneous Water Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Flo-Rite-Temp® Stainless Steel Instantaneous Water Heater - Sizing Chart . . . . . . . . . . . . . . . . . . . . 13
Flo-Rite-Temp® Instantaneous Water Heater Non Recirculating Hot Water Systems - Pre-Piped Single Temperature. . . . . . . . . . . . . . . . 14 - 17
Flo-Rite-Temp® Instantaneous Water Heater
Recirculating Hot Water Systems - Pre-Piped Single Temperature. . . . . . . . . . . . . . . . . . . . 18 - 21
Flo-Rite-Temp® Instantaneous Water Heater
Recirculating Hot Water Systems - Pre-Piped Tempered Water. . . . . . . . . . . . . . . . . . . . . . 22 - 25
Digital Water Temperature Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Hot Water System Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 - 29
Flo-Rite-Temp® Instantaneous Water Heater Specification Matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
3
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Steam/Water Heaters
Steam/water heaters are typically classified as instantaneous,
semi-instantaneous and tank-type. Temperature control can be
defined as either feed-forward or feedback.
Feedback systems are error-driven and rely upon an outlet or
downstream thermostatic temperature-sensing device to detect
a temperature change requirement and then modulate the steam
to effect the heat exchange in an attempt to recover the heater
set-point. Feedback systems are reactive, and a significant
concern is their speed of response to system and application
temperature control requirements.
Tankless Instantaneous Steam/Water Heaters are a less
attractive option for the following reasons:
•Lag time from message (thermostat) to action (control valve)
creates thermal lag and a resulting temperature swing.
•Modulating steam supply can cause condensate evacuation
issues, resulting in damage from water hammer and tube
bundle corrosion.
•A cycling phenomenon during low- or no-demand periods
will cause premature wear to the thermostatic element.
Thermostats typically fail in an open position, making
overheated, scald-temperature water available to the system.
Tank-Type Steam/Water Heaters (feedback)
Tank-type steam/water heaters typically include a temperature
sensing element or coil immersed in a storage vessel with a
separate, remote steam control valve. As a function of their
integral and often significant storage capability, the poor
response times often associated with the relationship of
temperature-sensing device and steam control valve are less of
an issue.
Tank-Type Steam/Water Heaters are a less attractive
option for the following reasons:
•They consume a large amount of valuable mechanical-room
real estate.
•Identified as amplification and colonization points for
Legionella bacteria.
•Significant leak potential over time.
•Tank repair is difficult, and tank replacement often requires
mechanical room/building structural modifications.
•They consume energy to heat and maintain what is effectively a
reserve hot water supply.
•Separate steam control valves, requires ongoing
maintenance.
•Thermostatic element/sensors have a tendency to wear and
eventually rupture under a heavy cycle load.
High-maintenance feedback systems with large storage tank may leak,
corrode or rupture a thermostatic control.
•They are slow to recover and may run out of hot water
during peak load periods.
Tankless Instantaneous Steam/Water Heaters
(feedback)
Tankless instantaneous steam/water heaters, often referred
to as shell and tube heat exchangers, do not include hot water
storage capacity. These models will rely upon either an outlet
or downstream temperature-sensing element with a separate
steam control valve.
Feedback instantaneous systems may suffer from lag time, tube bundle
corrosion and problems with thermostatic element deterioration.
4
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Semi-Instantaneous Steam/Water Heaters (feedback)
Semi-instantaneous steam/water heaters typically include lowercapacity storage, with an integral steam control valve to deliver
the heat exchange through an internally positioned element or
coil.
Semi-Instantaneous Steam/Water Heaters are a less
attractive option for the following reasons:
•Poor low-flow temperature control creates an accumulation
tank requirement.
•Accumulation tank creates recovery-time issues at
peak demand.
•Heating element/coil in generation/accumulation tank
is susceptible to failure and cross contamination.
•Accumulation tanks have been identified as amplification and
colonization points for Legionella bacteria.
•Although a lower-cost option, semi-instantaneous steam/
water heaters are a higher-maintenance selection.
•Semi-instantaneous steam/water heaters have a shorter
service life before replacement than other choices.
Flo-Rite-Temp® Instantaneous Steam/Water Heaters
(feed-f­­orward)
Flo-Rite-Temp feed-forward instantaneous steam/water heaters
offer a simple yet time-proven alternative to traditional feedback
instantaneous, semi-instantaneous and tank-type steam-heating
methods.
®
Semi-instantaneous water heaters are subject to poor recovery time at peak
demand, inadequate low-flow temperature control and shorter service life.
By eliminating the temperature sensing feedback element and
relying upon the actual hot water system demand requirement
within the system or application, feed-forward systems respond
rapidly and are extremely accurate.
Flo-Rite-Temp® Feed-Forward Instantaneous Steam/
Water Heater is a more attractive option for the
following reasons:
•The constant, non-modulating steam pressure within the
shell eliminates cycling wear and tear.
•The system demand or flow feed-forward activation
eliminates the requirement for either a steam control valve
or supplementary thermostatic control device.
•Flo-Rite-Temp® delivers a consistent outlet temperature
(+/-4°F of set-point) with no thermal lag and resulting
temperature swing.
•Flo-Rite-Temp® is extremely safe because the mixing unit will
position to cold water flow upon failure of the primary
operating component.
Flo-Rite-Temp® instantaneous steam/water heaters can easily do the work
of a storage tank unit many times its size—at lower installed cost and with
minimum maintenance. Even the largest capacity Flo-Rite-Temp® requires
only 13.5 ft2 (4.1 m2) of floor space.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
5
Flo-Rite-Temp® Instantaneous Steam/Water Heater
The Flo-Rite-Temp® instantaneous Steam/Water heater has
a unique feed-forward design which features a differential
pressure diaphragm actuated mixing unit integral to a shell and
tube heat exchanger.
The Flo-Rite-Temp® mixing unit manages the water flow through
the heat exchanger based upon downstream hot water demand
and eliminates the requirement for a modulating steam control
valve.
Operating on constant low pressure (2-15 PSI) steam, the FloRite-Temp® mixing unit supplies water to the heat exchanger
where it is overheated and then returned to the mixing unit
for proportional re-mixing with cold water to a pre-set outlet
temperature.
Outlet temperature set-point
adjustment
Speed of response
The differential pressure diaphragm within the mixing
unit rapidly responds to a change in system demand and
significantly reduces the lag times typically associated with feed
back/modulating steam control valve systems.
Failure Safe
The Flo-Rite-Temp® mixing units diaphragm actuated design
can be described as “failure safe” because in the event of a
diaphragm failure the mixing unit will fail with a cold bias and
will not allow hot water to exit the heat exchanger.
Automatic air venting
Integral diaphragm actuated
mixing unit eliminates
intermediate pipework
Scaling and fouling is reduced
because the internal control
valves/seats and moving parts
are only exposed to cold water
Differential pressure diaphragm rapidly responds to a
change in system demand and significantly reduced the
lag time
6
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Temperature Control and User Safety
Capable of controlling outlet temperatures +/- 4F, this principal
of operation offers the additional relevant benefit of reducing the
waterborne bacterial content of the water during the overheating
process. In addition, with no water storage requirement,
Flo-Rite-Temp® water heaters are a sensible selection as a
component of a broader system design initiative for Legionella
risk reduction.
Ease of Installation
No storage tank, small footprint, access via a standard
doorway and pre-piped packaged solutions reduce
installation time, space and expenditure.
Ease of Maintenance
Accessible “non helical” admiralty brass straight tubes inside
the carbon steel shell available mechanical cleaning and visual
inspection. Non modulating constant steam pressure ensures
condensate drainage and removes the potential for water
hammer damage and corrosion. There in no steam control
valve to maintain and typically no supplemental condensate
return equipment required.
Straight tubes for easy cleaning and easy removal
Removable tube
bundle cover/cap
eases maintenance
inspection and
mechanical
cleaning
Constant steam pressure drains
condensate which reduces tube
bundle corrosion and water
hammer issues.
Floating head reduces
tube stress
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
7
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Single Wall
Model 665 and 8120 Valve
Model 535 profile shown; 665 and 8120 profile shows that connections
for water inlet and outlet are on opposite sides of the valve body.
Dimensions
A
Model
B
C
D
E
in
mm
in
mm
in
mm
in
mm
535
67-1/2
1,715
5-1/4
133
8-5/8
219
9
229 5-9/16
665
82
2,083
5-3/4
146
10-3/8 264 10-3/8 264
8120
85
2,159
5-3/4
146
11-3/4 299
12
305
in
F
H
in
J
mm in mm
K
L
mm
in
mm
62
1,575
9
229
203 8-3/4 222
74
1,880
11
280
203 9-1/2 241
74
1,880 12-3/8
in
mm
in
mm
141
4
102
3-11/16
94
7-7/8 200
7
178 7-1/2 191
6-5/8
168
4-5/8
117
4-9/16
116
9-1/4 235
8
8-5/8
219
6
152
8-7/8
225
9-1/2 241
8
Connections and Weights
in
mm in
M
Weight
1-Water
2-Drain
3-Steam
in (mm)
in (mm)
ib (mm)
lb
kg
535
1-1/2 (40) NPT
1 (25)NPT
2-1/2 (65) NPT
235
107
665
2 (50) NPT*
1-1/4 (32) NPT
3 (80) NPT
358
162
8120
3 (80) NPT*
2 (50) NPT
4 (100) 150# ANSI
585
265
Application
Steam Supply
Pressure
Water Supply
Pressure
Maximum Water
Pressure Drop
Steam to Water
2 - 15 psig
(0.14 - 1.0 bar)
20-150 psig
(1.4 - 1.0 bar)
10 psig
(0.7 bar)
NOTE: Reusable insulation wraps available.
*665 and 8120 connections for water inlet and outlet are on opposite sides of the
valve body.
Materials
Body
Valve
Valve Seats
Diaphragm
Heat Exchanger
Shell
Heat Exchanger
Tubes
Tube
Sheets
Tube Bundle
End Cap
Lead Free
Bronze
(535/665/8120)
Stainless Steel
Lead Free Bronze
Viton® GF
Reinforced
w/Nomex® Fiber
Carbon Steel
ASTM SA 106-B
ASME “U” Stamped
5/8” 16 BWG
Admiralty Brass
Naval Brass
Naval Brass
NOTE: Units are NSF-61 certified.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
8
314
Specifications
Connections
Model
G
mm
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Double Wall
Model 665DW and 8120DW Valve
535DW Profile
The DW (double wall) version of the Flo-Rite-Temp® instantaneous water
heater uses a double-wall tube to provide positive separation of the
steam and water in the heat exchanger. The area between the walls of
the tubes vents to atmosphere so you can detect tube failure without
cross-contaminating either the steam or water. The Flo-Rite-Temp® DW
is well suited for all hot water applications where steam is available and
plumbing codes or safety requirements prevent the heating medium
and the potable water supply from being cross-contaminated.
Specifications
Steam Supply
Pressure
2 - 15 psig
(0.14 - 1.0 bar)
Application
Steam to Water
Water Supply
Pressure
20 - 150 psig
(1.4 - 10.3 bar)
Maximum Water
Pressure Drop
10 psig
(0.7 bar)
Connections and Weights
Connections
2-Drain
Tube Bundle Removal
3-Steam
Weight
Model
1-Water
in (mm)
in (mm)
in (mm)
in
mm
lb
kg
535DW
1-1/2 (40) NPT
1 (25) NPT
2-1/2 (65) NPT
75
1,905
270
122
665DW
2 (50) NPT*
1-1/4 (32) NPT
3 (80) NPT
87
2,210
444
201
8120DW
3 (80) NPT*
2 (50)
4 (100) 150# ANSI
75
1,905
665
302
*665 and 8120 connections for water inlet and outlet are on opposite sides of the valve body.
Materials
Body
Valve Seats
Diaphragm
Heat Exchanger
Shell
Heat Exchanger Tubes
Tube Sheets*
(665DW/8120DW)
Lead Free Bronze
Viton GF
Reinforced
w/ Nomex® GF
Carbon Steel
ASTM SA 106-B
ASME “U” Stamped
5/8” Copper Inner Tube
3/4” ID Grooved Copper
Outer Tube
Lead Free
Steam Side Steel
Water Side Brass
Valve
Lead Free
Bronze
(535DW/665DW/812DW)
Stainless Steel
®
*There is an open vent to atmosphere between the tube sheets to detect tube failure.
Dimensions
535DW
in
77-3/8
mm
1,965
in
5-1/4
mm
133
C
in
mm
8-5/8 219
665DW
90-5/8
2,302
5-3/4
146
10-3/8
8120DW
79-7/8
2,029
5-3/4
146
11-3/4
Model
A
B
in
9
D
mm
229
E
in
mm
5-9/16 141
264
10-3/8
264
6-5/8
198
12
305
8-5/8
F
G
in
mm
4-1/4 108
in
4
mm
102
168
7-3/4
121
5
219
6
152
8-3/4
H
in
mm
11-1/2 292
in
7
J
mm
178
127
11-3/4
298
8
222
12-5/8
321
8
K
L
in
8-1/8
mm
206
in
75
mm
1,905
203
9-3/4
248
87
203
11-5/8
295
75
M
in
9
mm
229
2,210
11
280
1,905
12-3/8
314
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
9
Flo-Rite-Temp® Instantaneous Steam/Water Heater
For submittal drawing refer to:
Model 535
Single Wall
D58651
Model 535DW
Double Wall
D58652
Model 665
Single Wall
D58644
Model 665DW
Double Wall
D58645
Model 665SS
Stainless Steel
D32713
Model 8120
Single Wall
D58653
Model 8120DW
Double Wall
D58654
Model 8120SS
Stainless Steel
D32958
Water Heater Installation Detail
The Flo-Rite-Temp® models identified in the submittal table below are provided, as standard,
with an Armstrong steam trap and thermostatic air vent (shaded). All other items indicated,
are shown for water heater installation detail only. For pre-piped packaged Flo-Rite-Temp® water
heater assemblies, refer to pages 14-26.
Armstrong
PRV
Steam
In
Armstrong
TVS Trap
Armstrong
Thermostatic
Air Vent
CIP
Connection
Heated Water
By-Pass
Supply
Water
Unit Setting
Temperature Gauge
Flo-Rite-Temp
Thermal Loops
Drain
Armstrong
Trap
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
10
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Single Wall and Double Wall Sizing Chart
Water and Steam Capacities
Inlet
Set
Temp. Temp.
o
F
F
o
120
130
40
140
160
180
120
130
50
140
160
180
130
140
60
160
180
Standard
Inlet
Set
Temp. Temp.
Hot Water Capacities*
Steam Capacities
Steam Pressure
psig
5
10
gpm
40
43
74
80
145 145
34
37
63
68
122 136
29
32
54
59
97
109
22
24
40
45
83
89
13
15
26
29
47
52
44
45
80
80
145 145
1,946
3,601
7,160
1,876
3,472
6,705
1,804
3,338
6,000
1,652
3,057
5,700
1,219
2,355
4,130
1,896
3,508
7,035
2
37
69
142
32
58
112
27
50
88
20
37
69
12
23
43
41
76
145
15
2
43
80
145
39
73
145
34
63
120
26
48
95
16
32
59
45
80
145
1,543
2,855
5,680
1,472
2,723
5,040
1,397
2,585
4,400
1,235
2,286
4,140
861
1,663
3,010
1,495
2,767
5,740
Steam Pressure
psig
5
10
lbs/hr
1,657
1,814
3,067
3,356
6,160
6,760
1,587
1,743
2,936
3,226
5,490
6,120
1,513
1,671
2,799
3,091
4,850
5,450
1,355
1,517
2,508
2,806
4,980
5,340
966
1,104
1,866
2,134
3,290
3,640
1,609
1,764
2,977
3,264
6,090
6,580
15
34
64
127
37
68
138
40
75
145
43
80
145
1,425
2,637
5,080
1,539
2,848
5,520
1,695
3,137
6,120
1,827
3,381
6,760
29
54
99
21
39
76
12
24
49
38
70
145
32
58
111
22
41
85
13
25
59
31
58
108
23
42
90
14
27
55
41
76
145
34
63
123
24
45
99
14
28
67
34
64
121
25
47
95
16
30
63
45
80
145
38
69
137
27
50
104
16
32
80
37
68
134
28
51
102
17
33
72
45
80
145
40
75
145
30
55
115
18
35
90
1,352
2,502
4,455
1,194
2,210
4,180
831
1,605
3,185
1,378
2,550
5,110
1,307
2,418
4,440
1,152
2,132
4,250
800
1,546
3,540
1,467
2,715
4,860
1,313
2,429
4,950
934
1,805
3,575
1,491
2,760
5,465
1,421
2,629
4,920
1,270
2,349
4,950
902
1,743
4,020
1,624
3,005
5,445
1,473
2,725
5,225
1,071
2,069
4,095
1,646
3,046
6,090
1,576
2,917
5,480
1,428
2,642
5,200
1,037
2,004
4,800
1,756
3,250
6,030
1,607
2,974
5,610
1,185
2,289
4,680
1,777
3,288
6,510
1,708
3,160
6,080
1,561
2,889
5,750
1,150
2,221
5,400
C
o
o
C
49
54
4
60
71
82
49
54
10
60
71
82
54
60
16
71
82
Metric
Hot Water Capacities*
Steam Capacities
Steam Pressure
bar
0.35 0.7
m3/h
9.1
9.8
16.8 18.2
32.9 32.9
7.7
8.4
17.3 15.4
27.7 30.9
6.6
7.3
12.2 13.3
22.0 24.7
5.0
5.5
9.1
10.2
18.8 20.2
3.0
3.4
5.9
6.6
10.7 11.8
10.0 10.2
18.2 18.2
32.2 32.2
Steam Pressure
bar
0.35
0.7
kg/h
749
820
1,386 1,517
2,794 3,066
717
788
1,327 1,458
2,490 2,776
684
755
1,265 1,397
2,200 2,472
612
686
1,134 1,268
2,259 2,422
438
501
846
968
1,492 1,651
727
797
1,346 1,475
2,762 2,985
0.14
8.4
15.7
32.2
7.3
13.2
25.4
6.1
11.3
20.0
4.5
8.4
15.6
2.7
5.2
9.7
9.3
17.3
32.2
1
0.14
10.2
18.2
32.9
8.8
16.6
32.9
7.7
14.3
27.2
5.9
10.9
21.6
3.6
7.3
13.4
10.2
18.2
32.2
697
1,290
2,576
665
1,230
2,286
631
1,168
1,996
558
1,033
1,878
390
754
1,363
676
1,251
2,603
Model
1
880
1,628
3,248
848
1,569
3,041
815
1,509
2,722
747
1,382
2,585
553
1,068
1,873
857
1,586
3,191
535
665
8120
535
665
8120
535
665
8120
535
665
8120
535
665
8120
535
665
8120
7.7
14.5
28.8
8.4
15.4
31.3
9.1
17.0
32.2
9.8
18.2
32.2
644
696
1,192 1,287
2,304 2,504
766
1,418
2,776
826
1,528
3,066
535
665
8120
6.6
12.2
22.5
4.7
8.9
17.2
2.7
5.4
11.1
8.7
15.9
32.2
7.3
13.2
25.2
5.0
9.3
19.3
3.0
5.7
13.4
7.0
13.2
24.5
5.2
9.5
20.4
3.2
6.1
12.5
9.3
17.3
32.2
7.7
14.3
27.9
5.5
10.2
22.5
3.2
6.4
15.2
7.7
14.5
27.5
5.7
10.7
21.6
3.6
6.8
14.3
10.2
18.2
32.2
8.6
15.7
31.1
6.1
11.3
23.6
3.6
7.3
18.1
8.4
15.4
30.4
6.4
11.6
23.1
3.9
7.5
16.3
10.2
18.2
32.2
9.1
17.0
32.2
6.8
12.5
26.1
4.1
7.9
20.4
611
1,131
2,021
540
999
1,896
377
728
1,445
623
1,152
2,318
591
1,093
2,014
521
964
1,928
363
701
1,606
734
1,358
2,470
665
1,232
2,370
486
938
1,857
744
1,377
2,762
712
1,318
2,486
645
1,194
2,359
470
909
2,177
794
1,474
2,735
726
1,344
2,545
537
1,037
2,123
803
1,486
2,953
772
1,428
535
665
8120
535
665
8120
535
665
8120
535
665
8120
535
665
8120
535
665
8120
535
665
8120
663
1,227
2,204
593
1,098
2,245
424
819
1,622
674
1,247
2,524
642
1,188
2,232
574
1,062
2,245
409
791
1,823
706
1,306
2,608
522
1,007
2,449
*Units may be piped in parallel when desired capacities exceed that of a single unit.
NOTES: Minimum water temperature increase is 60oF (33oC). Consult factory if less than 60oF (33oC) increase is required or a set temperature below 120oF (49oC) is required.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
11
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Stainless Steel
Model 665 SS and 8120 SS Valve
The Flo-Rite-Temp® SS is a compact, steam to water,
instantaneous water heater with all wetted metal parts
of stainless steel. Because of its construction
materials, this heater is well-suited for heating most
corrosive liquids, such as demineralized, deionized or reverse
osmosis water commonly used by manufacturers
of electronic equipment, pharmaceutical and food.
• Heavy duty 5/8’’ tubes of 16 gauge 316L stainless steel
ensure long life and maintainability backed up by a
10-year tube bundle warranty against workmanship and
material defects.
• Control valve is mounted integral to the heat exchanger, thus
eliminating intermediate piping leaks.
Features
• Feed-forward control provides accurate temperature
control on demand even when demand fluctuates abruptly.
• Feed-forward operation ensures that the heater will fail safely
in the closed (cold) position to prevent overheating.
• Straight, non-U-bend tube bundle with removable end cover
provides for easy tube cleaning along with the
capability to visually inspect all tubes.
• Constant steam pressure on heat exchanger at all times
means positive condensate evacuation, avoiding damage to
the exchanger due to water hammer.
Specifications
Application
Steam Supply Pressure
Water Supply Pressure
Maximum Water Pressure Drop
Steam to Water
2 - 15 psig (0.14 - 1.0 bar)
20 - 150 psig (1.4 - 10.3 bar)
10 psig (0.7 bar)
Materials
Body
Valve
Diaphragm
Heat Exchanger Shell
Heat Exchanger
Tubes
Heat Exchanger
Tube Sheets
Viton® GF Reinforced
w/ Nomex® Fiber
Carbon Steel (Standard)
Staineless Steel (Optional)
Stanless Steel
Stainless Steel
Valve Seats
Stainless Steel
Dimensions and Weights
Model
Dimensions
Connections
A
B
C
D
E
F
G
H
J
K
L
1
2
3
5-3/4
10-3/8
10-3/8
6-5/8
4-3/4
5-1/2
9-1/4
8
8-3/4
74
2 NPT
1-1/4
NPT
3 NPT
665 SS
in
mm
82-3/4
2,102
146
264
264
168
121
140
235
191
222
1,880
50
32
80
8120
SS
in
mm
90
5-3/4
10-3/8
10-3/8
8-5/8
8-1/8
8-7/8
9-1/2
8
14-1/2
74
2 NPT
2 NPT
4 150# ANSI
2,286
146
264
264
219
156
225
203
368
1,880
50
50
100
Weight
lb
kg
335
lb
kg
670
152
298
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
12
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Stainless Steel Sizing Chart
Capacities and Steam Loads
Standard
Inlet
Set
Temp. Temp.
o
o
F
F
120
130
40
140
160
180
120
130
50
140
160
180
120
130
60
140
160
180
Metric
Hot Water Capacities*
Steam Capacities
Steam Pressure
psig
5
10
gpm
44
47
89
97
37
41
72
80
32
35
57
64
18
19
48
53
13
15
35
40
48
53
97
105
41
44
81
89
34
38
64
71
19
21
51
56
14
16
37
42
55
60
104 122
45
49
92
100
37
41
73
81
20
22
54
60
2,138
4,368
2,061
3,956
1,982
3,540
1,353
3,646
1,217
3,280
2,083
4,183
2,007
4,031
1,930
3,558
1,316
3,545
1,183
3,188
2,027
4,139
1,952
3,988
1,876
3,703
1,279
3,445
1,148
3,093
2
41
84
35
66
30
52
17
44
12
32
45
91
38
75
32
58
17
46
12
33
51
71
42
86
35
66
18
49
13
35
14
39
17
44
15
2
51
103
43
86
37
71
21
57
17
44
56
113
47
95
41
79
23
61
18
47
64
130
53
108
44
87
24
65
1,695
3,351
1,617
2,974
1,535
2,596
1,011
2,726
860
2,316
1,643
3,300
1,566
2,997
1,486
2,628
978
2,635
830
2,235
1,590
3,247
1,514
3,093
1,436
2,620
943
2,543
Steam Pressure
psig
5
10
lbs/hr
1,821
1,993
3,720
4,100
1,743
1,915
3,239
3,611
1,662
1,836
2,862
3,216
1,110
1,242
2,990
3,346
964
1,103
2,598
2,971
1,768
1,938
3,550
3,892
1,691
1,862
3,257
3,740
1,612
1,784
2,867
3,212
1,075
1,206
2,896
3,249
993
1,070
2,513
2,882
1,713
1,883
3,500
3,846
1,639
1,808
3,347
3,694
1,561
1,732
2,903
3,233
1,040
1,170
2,801
3,151
19
49
799
2,152
901
2,427
1,035
2,791
15
Inlet
Set
Temp. Temp.
o
o
C
C
49
54
4
60
71
82
49
54
10
60
71
82
49
54
16
60
71
82
Hot Water Capacities*
Steam Capacities
Steam Pressure
bar
0.35 0.7
m3/h
10
10.7
20.2
22
8.4
9.3
16.4 18.2
7.3
7.9
12.9 14.5
4.1
4.3
10.9
12
3
3.4
7.9
9.1
10.9
12
22
23.8
9.3
10
18.4 20.2
7.7
8.6
14.5 16.1
4.3
4.8
11.6 12.7
3.2
3.6
8.4
9.5
12.5 13.6
23.6 27.7
10.2 11.1
20.9 22.7
8.4
9.3
16.6 18.4
4.5
5
12.3 13.6
Steam Pressure
bar
0.35
0.7
kg/h
826
904
1,687 1,860
791
869
1,469 1,638
754
833
1,298 1,459
503
563
1,356 1,518
437
500
1,178 1,348
802
879
1,610 1,765
767
845
1,477 1,696
731
809
1,300 1.457
488
547
1,314 1,474
423
485
1,140 1,307
777
854
1,588 1,745
743
820
1,518 1,676
708
786
1,317 1,466
472
531
1,271 1,429
970
1,981
935
1,794
899
1,606
614
1,654
552
1,488
945
1,897
910
1,828
875
1,614
597
1,608
537
1,446
919
1,877
885
1,809
851
1,680
580
1,563
409
1,101
521
1,403
0.14
9.3
19.1
7.9
15
6.8
11.8
3.9
10
2.7
7.3
10.2
20.7
8.6
17
7.3
13.2
3.9
10.4
2.7
7.5
11.6
16.1
9.5
19.5
7.9
15
4.1
11.1
3
7.9
3.2
8.9
3.9
10
1
0.14
11.6
23.4
9.8
19.5
8.4
16.1
4.8
12.9
3.9
10
12.7
25.7
10.7
21.6
9.3
17.9
5.2
13.9
4.1
10.7
14.5
29.5
12
24.5
10
19.8
5.5
14.8
769
1,520
733
1,349
696
1,178
459
1,237
390
1,051
745
1,497
710
1,359
674
1,192
444
1,195
376
1,014
721
1,473
687
1,403
651
1,188
428
1,154
4.3
11.1
362
976
469
1,266
Model
1
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
665 SS
8120 SS
*Units may be piped in parallel when desired capacities exceed that of a single unit.
NOTES: Minimum water temperature increase is 60oF (33oC). Consult factory if less than 60oF (33oC) increase is required or a set temperature
below 120oF (49oC) is required.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
13
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Non-Recirculating Hot Water Systems
Pre-Piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water Heaters-Non
Recirculating Hot Water Systems feature three single heat
exchanger and three double (parallel) heat exchanger
pre-piped single temperature packaged assemblies.
Ideal for both new construction and retrofit installation within an
existing building infrastructure. Flo-Rite-Temp® Pre-Piped Single
Temperature Systems are designed to fit through a standard
32” doorway (Model 8120 36” doorway).
Parallel heat exchangers offer increased flow rates and/or
system redundancy within the same footprint. The Parallel
(P) option also offers the ability to perform preventative
maintenance on the tube bundle and control valve while the
redundant water heater remains online.
Flo-Rite-Temp® Pre-Piped Single Temperature Systems
are fully assembled and include the following installation
components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Lead Free Compliant
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
14
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Non-Recirculating Hot Water Systems
Pre-Piped Single Temperature
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard
configurations per the specification matrix on page 30.
Customized Hot Water System Solutions are our
specialty. Multiple orientations, configurations and
options are available.
Additionally, where appropriate, Armstrong can integrate
engineering services, turn key installation and project
management, system assessment and optimization along
with energy conservation measure (ECM) capability through
Armstrong Service Incorporated.
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
System Layout
- Legend Thermometer
Check Valve
Thermostatic
Mixing Valve
Isolation Valve
Sink
Stop Valve
Shower
Mixed Flow
Strainer
Cold Water Supply
Steam Inlet
Condensate Drain
Hot Water Out
Bypass to
Drain
Cold Water Supply
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
15
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Non-Recirculating Hot Water Systems
Pre-Piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water Heater for
Non-Recirculating Hot Water Systems feature three heat
exchanger options offered as pre-piped single
temperature packaged assemblies.
Flo-Rite-Temp® Pre-Piped Single Temperature
Systems are fully assembled and include the
following installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Lead Free Compliant
Ideal for both new construction and retrofit installation within an
existing building infrastructure. Flo-Rite-Temp® Pre-Piped Single
Temperature Systems are designed to fit through a standard
32” doorway (Model 8120 36” doorway).
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on pages 30.
For submittal drawing refer to:
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
Model FRT535
Single Wall
D609388
Model FRT535DW
Double Wall
D611238
Model FRT665
Single Wall
D611249
Model FRT665DW
Double Wall
D611252
Model FRT8120
Single Wall
D610132
Model FRT8120DW
Double Wall
D611266
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Model
FRT535
FRT665
FRT8120
Outlet Temperature
Entering Water
Temperature
120
130
140
160
180
40
45
39
34
26
16
50
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
50
80
80
68
51
33
60
-
80
75
55
35
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
16
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Non-Recirculating Hot Water Systems
Parallel/Redundant Pre-piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water Heater for
Non-Recirculating Hot Water Systems feature three heat
exchanger options offered as pre-piped parallel single
temperature packaged assemblies.
Flo-Rite-Temp® Pre-Piped Parallel (P) Single Temperature
Systems are fully assembled and include the following
installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Lead Free Compliant
Ideal for both new construction and retrofit installation within
an existing building infrastructure. Flo-Rite-Temp® Pre-Piped
Parallel (P) Single Temperature Systems are designed to fit
through a standard 32” doorway (Model 8120 36” doorway).
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations
per the specification matrix on page 30.
For submittal drawing refer to:
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Model FRT535P
Single Wall
D611241
Model FRT535DWP
Double Wall
D611598
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water
temperature controls/loops and varied other components can
be engineered to meet specific application requirements.
Model FRT665P
Single Wall
D611262
Model FRT665DWP
Double Wall
D611698
Model FRT8120P
Single Wall
D611317
Model FRT8120DWP
Double Wall
D611761
The given GPM flow rate is doubled when a unit is operated in Parallel (P).
• Thermal Shutdown Mode
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Entering Water
•Model
Typical +/- 2°F
Temperature Stability
to fixture
Temperature
120
130
40
140
160
180
45
39
34
26
16
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
80
68
51
33
55
35
FRT535P
50 Flow Rates
•
Accuracy at Low
•
Temperature Locking
Feature 80
50
FRT665P
FRT8120P
Outlet Temperature
60
-
80
75
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
17
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water Heaters for
Recirculating Hot Water Systems feature three single heat
exchanger and three double (parallel) heat exchanger
pre-piped single temperature packaged assemblies.
Ideal for both new construction and retrofit installation within an
existing building infrastructure. Flo-Rite-Temp® Pre-Piped Single
Temperature Systems are designed to fit through a standard
32” doorway (Model 8120 36” doorway).
Parallel heat exchangers offer increased flow rates and/or
system redundancy within the same footprint and allows for
tube bundle and control valve servicing while the water heater
remains online.
Flo-Rite-Temp® Instantaneous Steam/Water Heaters
Recirculating Hot Water Solutions-for single temperature
systems feature an integral thermostatic diverting valve which
maintains re-circulating hot water temperatures
during zero system draw off “idling” periods.
Flo-Rite-Temp® Pre-Piped Single Temperature Systems
are fully assembled and include the following installation
components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Thermostatic Diverting Valve*
• Lead Free Compliant
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
18
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Single Temperature
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on page 30.
Customized Hot Water System Solutions are out specialty.
Multiple orientations, configurations and options are available.
Additionally, where appropriate, Armstrong can integrate
engineering services, turn key installation and project
management, system assessment and optimization along
with energy conservation measure (ECM) capability through
Armstrong Service Incorporated.
Hot Water System Solutions which include condensate
recovery, pre-piped PRV stations, additional mixed water
temperature controls/loops and varied other components can
be application engineered specifically to meet the projects
requirements.
Steam Inlet
Mixed Return
Mixed Flow
Cold Water Supply
Bypass to Drain
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
19
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water
Heater for Recirculating Hot Water Systems feature four heat
exchanger options offered as pre-piped single temperature
packaged assemblies.
Flo-Rite-Temp® Pre-Piped Recirculating (R) Single Temperature
Systems are fully assembled and include the following
installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Thermostatic Diverting Valve
Ideal for both new construction and retrofit installation within
an existing building infrastructure. Flo-Rite-Temp® Pre-Piped
Recirculating (R) Single Temperature Systems are designed to
fit through a standard 32” doorway
(Model 8120 36” doorway).
For submittal drawing refer to:
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on pages 30.
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Model FRT535R
Single Wall
Temp Specific*
Model FRT535DWR
Double Wall
Temp Specific*
Model FRT665R
Single Wall
Temp Specific*
Model FRT665DWR
Double Wall
Temp Specific*
Model FRT8120R
Single Wall
Temp Specific*
Model FRT8120DWR
Double Wall
Temp Specific*
*Part Numbers are Specific to Temperature Set Points – Installation Details Form (IDF)
Required
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Model
FRT535R
FRT665R
FRT8120R
Outlet Temperature
Entering Water
Temperature
120
130
140
160
180
40
45
39
34
26
16
50
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
50
80
80
68
51
33
60
-
80
75
55
35
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
20
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Parallel/Redundant Pre-Piped Single Temperature
Flo-Rite-Temp® Instantaneous Steam/Water Heater for
Recirculating Hot Water Systems feature four heat exchanger
options offered as pre-piped parallel single temperature
packaged assemblies.
Flo-Rite-Temp® Pre-Piped Parallel (P) Recirculating (R) Single
Temperature Systems are fully assembled and include the
following installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• Thermostatic Diverting Valve
Ideal for both new construction and retrofit installation within an
existing building infrastructure. Flo-Rite-Temp® Pre-Piped
Parallel (P) Recirculating (R) Single Temperature Systems are
designed to fit through a standard 32” doorway (Model 8120 36”
doorway).
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on page 30.
For submittal drawing refer to:
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Hot Water System Solutions which include condensate
recovery, pre-piped PRV stations, additional mixed water
temperature controls/loops and varied other components can
be application engineered specifically to meet the projects
requirements.
Model FRT535PR
Single Wall
Temp Specific*
Model FRT535DWPR
Double Wall
Temp Specific*
Model FRT665PR
Single Wall
Temp Specific*
Model FRT665DWPR
Double Wall
Temp Specific*
Model FRT8120PR
Single Wall
Temp Specific*
Model FRT8120DWPR
Double Wall
Temp Specific*
*Part Numbers are Specific to Temperature Set Points – Installation Details Form (IDF)
Required
The given GPM flow rate is doubled when a unit is operated in Parallel (P).
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Model
FRT535PR
FRT665PR
FRT8120PR
Outlet Temperature
Entering Water
Temperature
120
130
140
160
180
40
45
39
34
26
16
50
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
50
80
80
68
51
33
60
-
80
75
55
35
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
21
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Tempered Water
Flo-Rite-Temp® Instantaneous Steam/Water HeatersRecirculating Hot Water Systems feature three single heat
exchanger and three double (parallel) heat exchanger
pre-piped tempered water packaged assemblies.
Parallel heat exchangers offer increased flow rates and/or
system redundancy within the same footprint and allows for
tube bundle and control valve servicing while the water heater
remains online.
Flo-Rite-Temp® Pre-Piped Tempered Water Systems are fully
assembled and include the following installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• “The Brain” Digital Recirculating Valve
Ideal for both new construction and retrofit installation within an
existing building infrastructure. Flo-Rite-Temp® Pre-Piped Single
Temperature Systems are designed to fit through a standard
32” doorway (Model 8120 36” doorway).
Flo-Rite-Temp® Instantaneous Steam/Water HeatersRecirculating Hot Water Solutions-for tempered water systems
feature “The Brain”.
The Brain delivers +/- 2F temperature control for systems
which experience diverse user draw-off between 0-188GPM.
The Brain is provided as standard with an integral mixed water
outlet sensor/transmitter and remote set point adjustment
capability for “plug and play” communication via PC, LAN or
resident Building Automation System (BAS).
More information on DRV40/DRV80 is detailed on the following
pages.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
22
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Tempered Water
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on page 30.
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Additionally, where appropriate, Armstrong can integrate
engineering services, turn key installation and project
management, system assessment and optimization along
with energy conservation measure (ECM) capability through
Armstrong Service Incorporated.
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
Mixed Flow
Steam Inlet
Bypass to
Drain
Mixed Flow
Recirculation
Cold Water Supply
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
23
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Pre-Piped Tempered Water
Flo-Rite-Temp® Instantaneous Steam/Water Heater for
Recirculating Hot Water Systems feature three heat exchanger
options offered as pre-piped tempered water packaged
assemblies.
Flo-Rite-Temp® Pre-Piped Tempered Water Systems are fully
assembled and include the following installation components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• DRV Digital Recirculating Valve
“The Brain” (DRV40, DRV50 or DRV80)
Ideal for both new construction and retrofit installation within
an existing building infrastructure. Flo-Rite-Temp® Pre-Piped
Tempered Water Systems are designed to fit through a
standard 32” doorway (Model 8120 36” doorway).
For submittal drawing refer to:
Armstrong Flo-Rite-Temp Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on page 30.
®
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
Model FRT53540
Single Wall
D611544
Model FRT53540BS
Single Wall
D612400
Model FRT535DW40
Double Wall
D611606
Model FRT535DW40BS
Double Wall
D614346
Model FRT66550
Single Wall
D610634
Model FRT66550BS
Single Wall
D614340
Model FRT665DW50
Double Wall
D611724
Model FRT665DW50BS
Double Wall
D614349
Model FRT812080
Single Wall
D611746
Model FRT812080BS
Single Wall
D614343
Model FRT8120DW80
Double Wall
D611775
Model FRT8120DW80BS
Double Wall
D614354
*Note – Maximum temperature outlet set-point on digital
recirculating valve is 158°F.
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Model
FRT53540
FRT66550
FRT812080
Outlet Temperature
Entering Water
Temperature
120
130
140
160
180*
40
45
39
34
26
16
50
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
50
80
80
68
51
33
60
-
80
75
55
35
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
*NOTE: If a 8120PP-PTW-DMC1 is selected for parallel operation, a second DRV 80 is recommended to increase the flow rate.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
24
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Recirculating Hot Water Systems
Parallel/Redundant Pre-Piped Tempered Water
Flo-Rite-Temp® Instantaneous Steam/Water Heater for
Recirculating Hot Water Systems feature three heat exchanger
options offered as pre-piped parallel tempered water packaged
assemblies.
Flo-Rite-Temp® Pre-Piped Parallel (P) Tempered Water Systems
are fully assembled and include the following installation
components:
• Steam Trap
• Air Vent
•Thermometers
• CIP connection port
• Flow Control/Isolation Valves
• DRV Digital Recirculating Valve
“The Brain” (DRV40, DRV50 or DRV80)
Ideal for both new construction and retrofit installation within an
existing building infrastructure Flo-Rite-Temp® Parallel (P) PrePiped Tempered Water Systems are designed to fit through a
standard 32” doorway (Model 8120 36” doorway).
Armstrong Flo-Rite-Temp® Instantaneous Steam/Water Heater
pre-piped packages are available in standard configurations per
the specification matrix on page 30.
For submittal drawing refer to:
Customized Hot Water System Solutions are our specialty.
Multiple orientations, configurations and options are available.
Hot Water System Solutions which include condensate
recovery, circulating pumps, additional mixed water temperature
controls/loops and varied other components can be engineered
to meet specific application requirements.
If unit is operated in parallel then double flow rate given for
total available capacity.
Model FRT535P50
Single Wall
D611564
Model FRT535P50BS
Single Wall
D614359
Model FRT535DWP50
Double Wall
D611676
Model FRT535DWP50BS
Double Wall
D614378
Model FRT665P80
Single Wall
D611513
Model FRT665P80BS
Single Wall
D614362
Model FRT665DWP80
Double Wall
D611730
Model FRT665DWP80BS
Double Wall
D614383
Model FRT8120P80
Single Wall
D612264
Model FRT8120P80BS
Single Wall
D612273
Model FRT8120DWP80
Double Wall
D612276
Model FRT8120DWP80BS
Double Wall
D612282
*Note – Maximum temperature outlet set-point on digital
recirculating valve is 158°F.
Flo-Rite-Temp™ Instantaneous Steam/Water Heater
Model
FRT535P40
FRT665P50
*FRT8120P80
Outlet Temperature
Entering Water
Temperature
120
130
140
160
180*
40
45
39
34
26
16
50
45
43
37
28
17
60
-
45
40
30
18
40
80
73
63
48
32
50
80
80
68
51
33
60
-
80
75
55
35
40
145
145
120
95
59
50
145
145
134
102
72
60
-
145
145
115
90
NOTE: All flow rates in gallons per minute and using 15 PSIG steam.
*NOTE: If a 8120PP-PTW-DMC1 is selected for parallel operation, a second DRV 80 is recommended to increase the flow rate.
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
25
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Digital
The Brain® Model DRV40
DRV40 Digital Recirculation Valve (DRV) designed specifically to be
the primary water temperature controller in a continuously pumped
circulating hot water system.
Digital technology provides enhanced water temperature control
accuracy which resists zero system demand “Temperature Creep”
without the use of a manual throttling valve or a temperature activated
pump shut-off device (aquastat).
Operational Specifications
• +/-2°F water temperature control at points of use 25’ (7.7 m)
downstream during demand
• +/-2°F water temperature control at the DRV during zero system
demand “idling” periods
• 2°F minimum valve inlet to outlet temperature requirement
(system recirculation temperature loss)
• Automatic shutoff of hot water flow upon cold water inlet supply
failure
• Automatic shutoff of hot water flow in the event of a power failure
• Programmable set point range of 81-158°F (27-70°C)
• Programmable thermal disinfection mode
• Programmable 1st level hi/lo temp alarm display
• Programmable temperature error level for safety shutdown
1.5”
Mixed Water
Outlet
1.5”
Hot Water
Inlet
1.5”
Cold Water
Inlet
Technical Specifications
•
•
•
•
•
•
•
•
•
•
•
100-240 V AC
Polymer Electronics Enclosure
Stainless Steel Valve Construction
Lead Free compliant
Maximum inlet HW supply temperature 185°F (85°C)
Minimum Circulation Flow - 5 GPM (19 LPM)
Minimum System Draw Off - 0
ASSE 1017, CSA B125 and CE Certified
Operational water pressure of 10 -150 psig (.7-10 bar)
Display in °C or °F
Shipping weight 15 lbs (6.8 kg)
5.7”
(144 mm)
6.8”
(172 mm)
3.3”
(83 mm)
Connectivity
SPCO Relay Outputs – Relay which is energized during operation.
LCD Display – Provides information on set point, delivered
temperature, error codes and alert conditions.
RS485 Serial Port – Connects the DRV to either BrainScan or
Modbus.
BrainScan® – BAS interface for Modbus, Bacnet™ or LonWorks™
plus operates as a web server.
Modbus – DRV can be configured to communicate directly with
Building Automation Systems (BAS) using Modbus RTU protocols.
9.4
(238 mm)
10.6”
(268 mm)
For a DRV40 submittal drawing, refer to D41578.
Recirculation Systems - Digital (gpm)
Pressure Drop (psi)
Model
5
10
15
DRV40
48
70
85
20
98
Minimum System Draw-Off
Maximum Flow @7.5 ft/sec.
CV
0
41
22
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
26
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Digital
The Brain® Model DRV50/80
DRV80 Digital Recirculation Valve (DRV) designed specifically to be
the primary water temperature controller in a continuously pumped
circulating hot water system.
Digital technology provides enhanced water temperature control
accuracy which resists zero system demand “Temperature Creep”
without the use of a manual throttling valve or a temperature activated
pump shut-off device (aquastat).
Operational Specifications
• +/-2°F water temperature control at points of use 25’ (7.7 m)
downstream during demand
• +/-2°F water temperature control at the DRV during zero system
demand “idling” periods
• 2°F minimum valve inlet to outlet temperature requirement
(system recirculation temperature loss).
• Automatic shutoff of hot water flow upon cold water inlet supply
failure
• Automatic shutoff of hot water flow in the event of a power failure
• Programmable set point range of 81-158°F (27-70°C)
• Programmable thermal disinfection mode
• Programmable 1st level hi/lo temp alarm display
3”
Mixed Water
Outlet
• Programmable temperature error level for safety shutdown
3”
Hot Water
Inlet
Technical Specifications
•
•
•
•
•
•
•
•
•
•
•
•
100-240 V AC
Polymer Electronics Enclosure
Stainless Steel Valve Construction – Lead Free compliant
DRV80 3” NPT
DRV50 2” NPT*
Maximum inlet HW supply temperature 185°F (85°C)
Minimum Circulation Flow – 10 GPM (38 LPM)
Minimum System Draw Off - 0
ASSE 1017, CSA B125 and CE Certified
Operational water pressure of 10-150 psig (.7-10 bar)
Display in °C or °F
Shipping weight 43 lbs (19.5 kg)
3”
Cold Water
Inlet
5.7”
(144 mm)
7.9”
(201 mm)
5.4”
(138 mm)
Connectivity
SPCO Relay Outputs – Relay which is energized during operation.
LCD Display – Provides information on set point, delivered
temperature, error codes and alert conditions.
RS485 Serial Port – Connects the DRV to either BrainScan or
Modbus.
BrainScan® – BAS interface for Modbus, Bacnet™ or LonWorks™
plus operates as a web server.
Modbus – DRV can be configured to communicate directly with
Building Automation Systems (BAS) using Modbus RTU protocols.
For a DRV50 submittal drawing, refer to D40864.
For a DRV80 submittal drawing, refer to D41579.
*DRV50 is a DRV80 supplied with 3” x 2” Bushings at the inlets and
outlet.
Recirculation Systems - Digital (gpm)
Pressure Drop (psi)
Model
5
10
15
DRV80
94
133
163
20
188
13.2”
(337 mm)
10.6”
(268 mm)
Minimum System Draw-Off
Maximum Flow @7.5 ft/sec.
CV
0
165
42
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
27
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Connectivity
The integral RS 485 Serial Port on The Brain® Digital
Recirculating Valve (DRV) can be used to connect the DRV to
either BrainScan® or directly to a Building Automation System
(BAS) which operates on a Modbus RTU protocol.
BrainScan®
BrainScan® is an optionally selected control module from
Armstrong which enables an interface with Building Automation
Systems (BAS) which utilize Modbus, Bacnet™ or LonWorks™
protocols via the use of specific protocessor cards.
BrainScan® also has an ethernet port and operates as a web
server for remote network access.
BrainScan® includes remote hot water supply, cold/
recirculation water supply, blended water outlet temperature
outputs and is supplied with a system graphic, memory card for
data storage and web based software.
BrainScan® includes terminals for additional installer supplied
RTD’s, pressure transducers and pulse type flow meters and
this data can be forwarded via the BrainScan® interface.
Modbus
Modbus – DRV can be configured to communicate directly with
BAS which use Modbus RTU protocols.
When configured for Modbus the DRV becomes a Remote
Terminal Unit (RTU).
The BAS will need to be using a Modbus RTU format.
When connected directly to a BAS using Modbus, the DRV can
be assigned a unique network address which is programmed
via the integral DB9 external port.
RS485 Port
The integral RS485 Serial Port provides an ability to remotely
program the DRV and update the firmware via BrainScan® or
Modbus.
The integral RS485 Serial Port can receive the following
outputs from the DRV and communicate them via BrainScan® or
Modbus.
•
•
•
Set Point
Inlet/Outlet Temperature
Over Temperature Alert
The integral RS485 Serial Port can receive the following selfdiagnostic error messages from the DRV and communicate
them via BrainScan® or Modbus
•
•
•
•
•
Over Temperature Error
PCB Error
Thermistor Error
Motor Error/Emergency Mode
Battery Error
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
28
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Flo-Rite-Temp® Instantaneous Steam/Water Heater
BrainScan®
BrainScan is a Digital Hot Water
Management System optionally
supplied with all Tempered Water
Packages featuring “The Brain Digital
Recirculating Valve.
®
®”
BrainScan is factory configured to engage
with:
®
•
•
•
Building Automation System (BacNet™,
LonWorks™, ModBus)
Local Area Network
Web Browser
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
29
Flo-Rite-Temp® Instantaneous Steam/Water Heater
Specification Matrix
Flo-Rite-Temp® water heaters are available in four base models
each sized with a prefix that denotes the shell size in inches
(5”, 6” and 8”) and a suffix that denotes the flow rate at a
100°F temperature rise (35 gpm, 65 gpm and 120 gpm).
Each Flo-Rite-Temp® model’s heat exchanger is single wall
construction as standard but is optionally available as a Double
Wall (suffix DW).
Each Flo-Rite-Temp® model is supplied as a shell and tube style
heat exchanger with integral mixing valve/head and
is also available as a pre-piped “Packaged Solution”.
Flo-Rite-Temp® Packaged Solutions are also available with
a second heater (parallel) for increased flow capacity, redundant
installation or both.
Flo-Rite-Temp® Packaged Solutions are supplied for either point
of use “dead-leg” (non-recirculating) applications, or can be
pre-piped with a thermostatic diverting valve for recirculation (R)
control.
Flo-Rite-Temp® Packaged Solutions designated as
Tempered Water Systems include an on board
Digital Recirculating Valve (DRV40/50/80).
Higher flow Flo-Rite-Temp® Packaged Solutions and Systems
designed with built-in redundancy can include two DRV’s
(40/40, 50/50, 80/80).
BrainScan®, a Digital Hot Water Management System Console,
can be added by adding the suffix BS with a hyphen. FloRite-Temp® packaged systems fitted as DRV can connect
BrainScan® directly to the serial port on the DRV40/50/80.
When Integrated accordingly BrainScan® is configured for most
building automation systems which use BacNet™, LonWorks™
and ModBus protocols. BrainScan® also avails LAN and Web
Browser connectivity options.
SPECIFICATION MATRIX
FRT 665 DW
P
R
80
BS
Heater Model
BrainScan Interface
535
665
8120
Recirculation System
BrainScan
Recirculation (R)
Option
Double Wall (DW)
Digital Recirculationg Valve (DRV)
40
50
80
Option
Parallel (P)
Triplex (Trip)
KEY
(DW)
(P)
(R) = Double Wall
=Parallel
= Recirculation
All dimensions and weights are approximate. Use certified print for exact dimensions. Design and materials are subject to change without notice.
30
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Notes
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
31
Armstrong provides intelligent system solutions that improve utility performance, lower energy consumption,
and reduce environmental emissions while providing an “enjoyable experience.”
Armstrong Hot Water Group
221 Armstrong Blvd., Three Rivers, MI 49093 - USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Bulletin HW-408-A
Printed in U.S.A. - 9/14
© 2014 Armstrong International, Inc.
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