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Large Unit Heater
3
Operating Instructions and Owner’s Manual
START-UP AND PERFORMANCE CHECK LIST
Job Name: ___________________________ Job No.: _____________________________ Date: _______________________________
Job Location: _________________________ City: ________________________________ State/Province: _______________________
Installer: _____________________________ City: ________________________________ State/Province: _______________________
Unit Model No.: _______________________ Serial No.: ____________________________ Service Technician: ____________________
Electrical Connections Tight? _____________________________ Flue Connections Tight? _____________________________________
Supply Voltage ________________________________________ Fan Timer Operation Checked? _______________________________
Gas Piping Connections Tight & Leak-Tested? _______________ THERMOSTAT Calibrated? ___________________________________
Motor Amps __________________________________________ Heat Anticipator Properly Set? ________________________________
Furnace BTU input _____________________________________ Level? ___________________________________________________
Line Pressure _________________________________________
Manifold Pressure W.C. _________________________________
PRODUCT SPECIFICATIONS
This unit heater is a single input warm air heater with an average thermal efficiency of 80%. All units are to be supplied with single-phase 60 Hz
120VAC power. For specific information on each model, see Table 1.
TABLE 1: Specifications
TABLE 2: General Performance Data
Dimensional Data
FIGURE 1
Top View
Rear View
Width
Height
Length
Width
BTU input BTU output Size
[BTU/HR] [BTU/HR] WIDTH LENGTH HEIGHT WEIGHT[Lbs.]
MHU200NG
200,000 160,000 41.3” 28.7” 24.8” 175
MHU250NG
250,000 200,000 41.3” 28.7” 24.8” 180
MHU300NG
300,000 240,000 41.3” 28.7” 30.3” 227
MHU400NG
400,000 320,000 41.3” 28.7” 38.6” 280
BTU input
[BTU/HR]
Entering
Airflow
[CFM]
Outlet
Velocity
[FPM]
AIr Temp.
Rise [ºF]
Motor
[Watt]
Motor
[RPM]
Fan Diameter
[Inch.]
MHU200NG
200,000 3,377 960 45.0 650 1,500 21.7
MHU250NG
250,000 3,435 976 55.3 650 1,500 21.7
MHU300NG
300,000 4,507 1,040 50.6 1,000 1,560 24.8
MHU400NG
400,000 5,763 1,040 52.7 1,000 1,560 24.8
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