Specification

0
5
10
15
20
25
30
35
40
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
Flow rate [GPM]
Pressure loss [psi]
0
10
20
30
40
50
60
70
80
90
Pressure loss [Ft. of head]
Rev. 01/2018
ut notice.
Specifications
50 (pounds)
Water Inlet
Hot Water Outlet
Condensate Drain
Supply
Temperature Settings with
115-140°F (In 5°F intervals) (6 Options)
Default Temperature Options
120, 130, 135, 140°F (Default is 120°F)
Connection
Sizes
Weight
Water Holding Capacity
Power
Model Name
Freeze Protection
46, 47, 48, 50, 55, 60°C (6 Options)
°F Mode
°C Mode
°F Mode
°C Mode
50, 55, 57, 60°C (Default is 50°C)
Gas Inlet
0.2 Gallon (0.9 L)
3/4"
3/4"
1/2"
120VAC (60Hz)
NG: 83W LP: 80W Freeze Prevention 129W
NRC663-FSV (EZTR40)
Outdoor: -4 °F
1/2"
Dimensions
Flow Rates
Optional Remote Controller
Pressure Loss Characteristics
Consumption
Temperature
Rise (°F)
Flow Rate
(GPM)
30
6.6
40
5.5
45
4.9
50
4.4
60
3.7
70
3.2
80
2.8
90
2.6
100
2.2
COLD WATER INLET(3/4"
HOT WATER OUTLET(3/4")
17.7"(450mm)
15.6"(397mm)
2.2"(55mm)
2.2"(56mm)
3.3"(83mm)
)
WATER DRAIN VALVE
WATER DRAIN VA
(WATER FILTER)
LVE
FLUE COLLAR
17.7"(450mm)
18.3"(464mm)
10.9"(278mm)
I.D.Φ2.4"(Φ60.8mm)
O.D.Φ3.9"(Φ99.5mm)
AIR INLET
DISPLAY WINDOW
27.2"(690mm)
GAS INLET(1/2"
(AC120V)
WIRING THOROUGH
1.9"(49mm)
14.6"(372mm)
15.4"(390mm)
6.6"(168mm)
2.0"(51mm)
6.3"(161mm)
VALVEWATER DRAIN
E DRAIN(1/2")CONDENSAT
VALVETER DRAIN WA
WA
Y
)
HOT WATER OUTLET
TOP
1.9"(48mm)
COLD WATER INLET
TOP
2.4"(61mm)
CONDENSATE DRAIN
BOTTOM
0.8"(20mm)
GAS INLET
BOTTOM
2.0"(50mm)
HEIGHT OF EACH FITTING FROM CASE
4.7"(120mm)
9.4"(240mm)
1.0"(25mm)
2.8"(71mm)
1.6"(40mm)
0.4"(10mm)
1.5"(38mm)
29.1"(740mm)
1.4"(36mm)
2.8"(70mm)
3.9"(100mm)
5.5"(140mm)
6.7"(170mm)
6×0.24"×0.4"(6×10mm)OBLONG HOLE
Φ0.5"(Φ13mm)
4×
1.4"(36mm)
2.8"(70mm)
3.9"(100mm)
5.5"(140mm)
6.7"(170mm)
6×0.24"×0.4"(6×10mm)OBLONG HOLE
4×Φ0.5"(Φ13mm)
661
(26.0")
0.4"(10mm) 7.8"(197mm)
(VIEW FROM TOP)
(VIEW FROM BOTTOM)
(FRONT VIEW)