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4
Page
Specifications
Installation Manual
Model
110U
Indoor
110U
Outdoor
310U
Indoor
310U
Outdoor
510U
Indoor
510U
Outdoor
Natural Gas Input
(Operating Range)
BTU/h
Min.: 15,000
Max.: 140,000
Min.: 15,000
Max.: 190,000
Min.: 15,000
Max.: 199,000
Gas Connection
3/4" NPT
Water Connections
3/4" NPT
Water Pressure*
psi
(Mpa)
15 - 150 (0.1 - 1)
Natural gas
Inlet Pressure
" W.C.
(kPa)
Min. 4.0 (1.00)
Max. 10.5 (2.61)
Weight
lbs. (kg)
37.5 (17.0)
39.7 (18.0)
Dimensions
Indoor
H 20.5 x W 13.8 x D 9.1 (Inch)
H 520 x W 351 x D 231 (mm)
Outdoor
H 20.5 x W 13.8 x D 8.5 (Inch)
H 520 x W 351 x D 216 (mm)
Ignition
Electric Ignition
Electric
Supply
VAC / Hz
120 / 60
Consump
tion
Operation
W / A
54 / 0.64
79 / 0.99
82 / 1.02
Standby
W / A
2 / 0.06
2 / 0.06
3 / 0.07
Freeze-
Protection
W / A
96 / 0.82
96 / 0.82
97 / 0.82
Water heater category**
Category
III
N/A
Category
III
N/A
Category
III
N/A
SPECIFICATIONS
*40 psi or above is recommended for maximum flow.
**Water heater Category —
water heaters of other than direct vent type, for outdoor installation, are divided into four
categories based on static pressure produced in the vent and flue loss.
Category I -
a water heater that operates with a non-positive vent static pressure and with a vent gas temperature
that avoids excessive condensate production in the vent.
Category II -
a water heater that operates with a non-positive vent static pressure and with a vent gas temperature
that may cause excessive condensate production in the vent.
Category III -
a water heater that operates with a positive vent static pressure and with a vent gas temperature that
avoids excessive condensate production in the vent.
Category IV -
a water heater that operates with a positive vent static pressure and with a vent gas temperature that
may cause excessive condensate production in the vent.
***These are equivalent lengths that include head loss for elbows, tees, unions, etc.
NOTE:
• Check the rating plate to ensure that this product matches your specifications.
•
The manufacturer reserves the right to discontinue, or change at any time, specifications or designs
without notice and without incurring obligation.