28
Giant
Manual
Technical
Data
Speci
fi
ca ons
Giant
is
con nually
upda ng
and
improving
products.
Therefore,
speci
fi
ca ons
are
subject
to
change
without
prior
no ce.
The
maximum
inlet
gas
pressure
must
not
exceed
the
value
speci
fi
ed
by
the
manufacturer.
The
minimum
value
listed
is
for
the
purpose
of
input
adjustment.
Model
UG40
‐
92TFTT
‐
N2U
or
UG40
‐
92TFTT
‐
P2U
Minimum
Gas
Consump on
BTU/hr
Natural
Gas:
59,500
BTU/hr
Propane:
47,600
BTU/hr
Maximum
Gas
Consump on
BTU/hr
Natural
Gas:
91,300
BTU/hr
Propane:
87,300
BTU/hr
First
Hour
Ra ng
180
GPH
Storage
Tank
Volume
40
gallons
(151.5
litres)
Recovery
(90°
Rise)
90
GPH
Temperature
Selec ons
110,
120,
130,
135,
140
Maximum
Temp
Se ng
140º
F
(60º
C)
Minimum
Temperature
Se ng
110º
F
(43º
C)
Weight
150
lb
(68
kg)
Thermal
E
ffi
ciency
80%
Noise
level
50
dB
Electrical
Consump on
Standby
3
Wa s
Opera on
150
Wa s
Minimum
Gas
Supply
Pressure
Natural
Gas
4.0
inch
(102
mm)
W.C.
Propane
8.0
inch
(203
mm)
W.C.
Maximum
Gas
Supply
Pressure
Natural
Gas
10.5
inch
(267
mm)
W.C.
Propane
13.5
inch
(343
mm)
W.C.
Type
of
Appliance
Automa c
Circula ng
Tank
Water
Heater
Approved
Gas
Type
Natural
Gas
or
Propane
‐
Ensure
unit
matches
gas
type
supplied
at
the
installa on
loca on.
Connec ons
Gas
Supply:
1/2”
(12.7
mm)
MNPT,
Cold
Water
Inlet:
3/4”
(19
mm)
MNPT,
Hot
Water
Outlet:
3/4"
(19
mm)
MNPT
Igni on
System
Direct
Electronic
Igni on
Electric
Connec ons
Appliance:
AC
120
Volts,
60Hz
Water
Temperature
Control
Simula on
Feedforward
and
Feedback
Water
Supply
Pressure
Minimum
Water
Pressure:
20
PSI
(Recommended
30
‐
50
PSI
for
maximum
performance)
Maximum
Water
Supply
Pressure
150
PSI
Flammable
Vapor
Sensor
Combus on
Air
Co
Sensor
Bi
‐
Metal
Overheat
Switch
Sensor
and
Switches
Fuse
5
Amps