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RECOVERY CAPACITY AND FIRST HOUR DELIVERED @ TEMPERATURE RISE °F WITH STORAGE TANK
Rack System Configurations
60° F
Temperature Rise
80° F
Temperature Rise
100° F
Temperature Rise
WH
qty.
Model
Max
BTUH
Input
Tank
Size
(Gal.)
Recovery
Pump Size
Thermal
Eciency
Recovery
GPH
First Hour
Delivered
(Gal.)
Recovery
GPH
First Hour
Delivered
(Gal.)
Recovery
GPH
First Hour
Delivered
(Gal.)
GPM
Head
(ft)
2
TRW02 /
TRW23
TRS02 /
TRS23
398,000
100
10 30 97% 772
842
578
648
463
533
200 912 718
603
300 982 788
673
3
TRW03 /
TRS03 /
TRS36
597,000
100
15 30 97% 1,158
1,228
867
937
695
765
200 1,298 1,007
835
300 1,368 1,077
905
400 1,438 1,147
975
4
2-TRW02 /
TRS04 /
TRS46
796,000
100
20 30 97% 1,544
1,614
1,157
1,227
927
997
200 1,684 1,297
1,067
300 1,754 1,367
1,137
400 1,824 1,437
2,207
5
TRW02 + /
TRW03 /
TRS05
995,000
200
25 30 97% 1,930
2,070
1,447
1,587
1,158
1,298
300 2,140 1,657
1,368
400 2,210 1,727
1,438
6
TRW03 + /
TRW03 /
TRS06
1,194,000
200
30 30 97% 2,316
2,456
1,736
1,876
1,389
1,529
300 2,516 1,946
1,599
400 2,596 2,016
1,669
DEFINITIONS:
Tank size: capacity of water in gallons inside storage tank as stated
by manufacturer
Recovery pump: pump that will circulate water from tank to
TRS during recovery period
Recovery Flow Rate: flow rate in GPM at which volume inside tank
is being recovered
Recovery GPH: the water heater’s ability to replenish hot water
as it’s drawn from the tank
Recovery eciency: the ratio of energy delivered to the water to the energy
content of the fuel consumed by the water heater
First Hour Delivered (Gal): usable volume of water that can be drawn in one
hour, determined using the following formula: First Hour Delivered (Gal) =
Recovery GPH + tank capacity x 0.70
Temperature rise: temperature dierence in °F between the TRS set point
and the incoming water temperature
Note: This chart should be used only when the existing or specified system is known. Select TRS model to the left. Use existing or specified storage tank with TRS selection. Reference chart above
for recovery GPH performance. To calculate “First Hour Delivered” add 70% of existing or specified tank volume to recovery GPH.
Multiple configurations available. Reference TRS Installation Manual. TRS models are free-standing units; TRW models are wall-mount units.
PERFORMANCE CHART FOR
TANKLESS RACK SYSTEMS UTILIZING STORAGE
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