13
I-UBX-UBZ-UDX-UDZ (03-21) 1034344-0
Table 10. Technical Data for UBX and UBZ Models (Unit Sizes 150–400)
Parameter
Unit Size
Unit of
Measurement
150 175 200 225 250 300 350 400
Input heating capacity
150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000 BTUh
43.9 51.2 58.6 65.9 73.2 87.8 102.5 117.1 kW
Thermal efficiency 83 83 83 83 82 %
Output heating capacity
1
124,500 145,250 166,000 186,750 207,500 249,000 290,500 328,000 BTUh
36.4 42.5 48.6 54.7 60.8 72.9 85.1 96.0 kW
Gas connection, natural
2
1/2 1/2 3/4 3/4 3/4
Inches
Gas connection, propane
2
1/2 1/2 3/4 3/4 3/4
Vent connection diameter
3
5 5 5 6 6
Combustion air inlet diameter
(UBZ models)
3
6 6 6 6
Control amps, 24V 1.0 1.0 1.0 1.0
Amps
Full load amps, 115V (UBX models) 5.9 9.6 10.5 12.7 12.7 17.7 27.3
Full load amps, 115V (UBZ models) 5.9 6.3 10.5 12.7 12.7 17.7 27.3
Maximum overcurrent protection, 115V
(UBX models)
4
15 20 25 30 30 40 60
Maximum overcurrent protection, 115V
(UBZ models)
4
15 25 30 30 40 60
Discharge air temperature rise
(minimum/maximum)
45/75 45/75 45/75 45/75 50/80 °F
Minimum air volume
1537 1793 2049 2306 2562 3074 3586 4100 cfm
43.5 50.8 58.0 65.3 72.5 87.0 101.5 116.1 Meter
3
/minute
Maximum air volume
2562 2989 3416 3843 4270 5123 5977 6185 cfm
72.5 84.6 96.7 108.8 120.9 145.1 169.2 175.1 Meter
3
/minute
Discharge air opening area
2.56 2.56 3.51 3.51 4.79 4.79 Foot
2
0.24 0.24 0.33 0.33 0.45 0.45 Meter
2
Minimum output velocity
600 700 800 657 730 642 749 856 fpm
183 213 244 200 223 196 228 261 Meter/minute
Maximum output velocity
1001 1168 1334 1095 1217 1070 1248 1291 fpm
305 356 407 334 371 326 380 393 Meter/minute
Standard blower motor size 1/4 1/2 1/2 3/4 3/4 1-1/2 2 Horsepower
Blower fan size 12 × 12 12 × 12 15 × 11 15 × 11 15 × 15 Inches
Sound level @ 15 feet 51 52 53 56 56 59 61 62 dba
1
CSA ratings for elevations up to 2,000 feet.
2
Size shown is for gas connection to a single-stage gas valve—not supply line size.
3
Smaller and/or larger vent and combustion air pipe diameters may be permissible. Refer to appropriate venting instructions listed in Table 1.
4
MOCP = 2.25 × (largest motor FLA) + smallest motor FLA. Answer is rounded to the next lower standard circuit breaker size.
To Next Page
Loading...
Need help?
General
