MrHeater MHU 45 User manual

Approved For Residential & Commercial Use.
• Residential Garages
• Workshops
• Metal Buildings
• Warehouses
• Agricultural Buildings
• Storage Buildings
Model MHU45 / 45,000 BTU/HR
Model MHU75 / 75,000 BTU/HR
GARAGE/SHOP SERIES
BIG MAXX
GAS UNIT HEATERS

www.mrheater.com Mr. Heater Inc. 4560 West 160th St. Cleveland, Ohio 44135 • 800-251-0001
FAN
DATA
FAN
MOTOR
DATA
EFFICIENT AND EFFECTIVE
CONVECTION HEAT.
EFFICIENT AND EFFECTIVE
CONVECTION HEAT.
• Quiet Operation
• Attractive Low Profile Design
Easy Installation
& Operating Versatility
• Easily Installs From Ceiling
With 2 Angle Brackets (Included)
• Power Exhaust Allows For
Vertical Or HorizontalVenting
• Designed For Right Or Left
Side Venting
Built-In Reliability
• Aluminized Tubular Heat Exchanger
For Maximum EfficiencyAnd
Longer Life
• Spark Ignition – Features
Self-Diagnostic Control Module
• Limited 3-Year Warranty On
Parts And Burner
• Limited 10-Year Warranty On
Heat Exchanger
F260045
700
45,000
36,450
750
45
25
10
1
10
4
63
56
1/20
1.7
1650
SP
3”
1/2”
3.0
F260145
700
45,000
36,450
750
45
25
10
1
10
4
63
56
1/20
1.7
1650
SP
3”
1/2”
3.0
F260775
1,000
75,000
60,000
950
60
40
12
1
14
3
91
79
1/10
4.1
1050
SP
4”
1/2”
6.0
F260875
1,000
75,000
60,000
950
60
40
12
1
14
3
91
79
1/10
4.1
1050
SP
4”
1/2”
6.0
MHU45NG MHU45LP MHU75NG MHU75LP
TECHNICAL DATA
1”
0”
18”
1”
18”
6”
Top
Bottom
Access Panel Side
Non-Access Side
Rear
Flue
MOUNTING CLEARANCES
12”
5 1/2”
4 1/4”
17”
6 1/2”
6 3/4”
A
B
C
DIMENSION MHU45 MHU75
* Ratings shown are for elevations up to 2,000 feet.
(In Canada, refer to rating tag.) For elevations
above 2,000 feet, ratings should be reduced at the
rate of 4% for each 1,000 feet above sea level or
as specified by local authority having jurisdiction.
NOTE: All dimensions shown in inches.
Stock Number
Heating Area (SQ. FT)
Total Input (BTU/HR)*
Total Output (BTU/HR)
Air Volume (CFM)
Temperature Rise
Air Throw At 8 Feet
Mounting Height (FT)
Max. Mounting Height
(floor to bottom of unit FT)
Number Of Fans
Diameter (IN)
Number Of Blades
Shipping Weight (LBS)
Net Weight (LBS)
Horsepower
Amps @ 115V/1PH/60Hz
RPM
Motor Type
Flue Size**
Gas Connection
Total Unit Amps
L321
VENTING SPECIFICATIONS
For Vertical Venting:
3” DIA. MHU45NG/LP (OptionalVent Kit Stock No. F102840)
4” DIA. MHU75NG/LP (OptionalVent Kit Stock No. F102848)
For Horizontal Venting:
4” DIA. MHU45NG/LP And MHU75NG/LP
(Optional Vent Kit Stock No. F102845)
Optional 24-Volt Thermostat:
Stock No. 10371
CSA Certified
A
B
C
MHU45/75