APPENDIX
TECHNICAL DATA
Model UEAS
130
180
260
310
Input Heating Capacity
BTUH
131,000
175,000
260,000
305,000
kw
38.4
51.2
76.1
89.3
Thermal Efficiency (%)
93
91
92
91
Output Heating Capacity
A
BTUH
121,830
159,250
239,200
277,550
kw
35.7
46.6
70.0
81.3
Gas Connection (inches)
B
Natural
1/2
1/2
3/4
3/4
Propane
1/2
1/2
3/4
3/4
Vent Connection Diameter (inches)
4
4
4
4
Combustion Air Inlet Diameter (inches)
6
6
6
6
Control Amps (24 volt)
1.0
1.0
1.0
1.0
Full Load Amps (115 volt)
6.3
6.3
10.0
10.0
Maximum Over Current Protection
C D
Standard 115V
15
15
20
20
Normal Power Consumption (watts)
657
657
1020
1020
Discharge Air Temperature Rise (°F)
50
60
50
60
Air Volume
CFM
2256
2458
4430
4283
M
3
/Minute
63.9
69.6
125.4
121.3
Discharge Air Opening Area
ft
2
2.6
2.6
4.8
4.8
M
2
0.2
0.2
0.5
0.5
Outlet Velocity
FPM
883
962
924
894
M/Minute
269
293
282
272
Fan Motor HP
D
Standard Open
1/4
1/4
1/2
1/2
Optional Enclosed
1/4
1/4
1/2
1/2
Fan Motor RPM
1050
1050
1050
1050
Fan Diameter (inches)
18
18
24
24
Approximate Condensate per Hour
Gallons
1
1
2
2
Liters
4
4
8
8
A
CSA ratings for altitudes to 2000 ft.
B
Size shown is for gas connection to a single-stage gas valve, not supply line size.
C
MOCP = 2.25 x (largest motor FLA) + smallest motor FLA. Answer is rounded to the nearest available standard circuit
breaker size.
D
Except where indicated, information in this table is based on a heater equipped with a standard 115 volt open fan
motor.
Operating Principle showing
Combustion Airflow and
Supply Airflow
This unit heater is a high efficiency appliance designed to extract part of the latent heat from the products
of combustion. This process forms condensation which is collected and directed to a drainage point inside
the unit. The heater is equipped with a 1/2” (12.7mm) PVC pipe for connecting to a condensate drain. The
water condensed from the products of combustion will be acidic. The level of concentration is dependent
upon the environment where the appliance is installed and may be as high as 6PH. DO NOT USE COP-
PER OR COPPER BASED ALLOYS FOR CONDENSATE DRAINS.
Room Supply
Air Intake
Warm
Air
Discharge
Flue Gas Outlet
Cooler flue gas
temperature
requires a con-
densate drain in
the vent.
Condensate
drain connection from
the secondary heat exchanger
Outside
Combustion Air
to the Burner
Form I-UEAS, Page 50