MrHeater MH25NG Assembly instructions

GAS FIRED INFRA-RED WORKSHOP HEATER
MR. HEATER INC., 4560 W. 160TH 2017 18672
Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe
place for future reference. Do not allow anyone who has not read these instructions to assemble,
light, adjust or operate the heater.
OPERATING INSTRUCTIONS Model #
MH25NG
MH25LP
WARNING:
- WHAT TO DO IF YOU SMELL GAS
WARNING
WARNING
MR. HEATER, INC., 4560 W. 160TH 2017 18672

E2 Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
WARNINGS
WARNING
WARNING: When used without fresh air, heater
WARNING
WARNING
DANGER
Carbon Monoxide Poisoning:
CAUTION
WARNING:
The State of California requires the following
warning:
TABLE OF CONTENTS
Chapter Title Page
I Introduction E3
II Heater Installation
LANGUAGES

E3 Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
VALVE
1. EQUIPMENT
Figure 1. Heater Major Components
2. PURPOSE OF EQUIPMENT
WARNINGS
CHAPTER I
INTRODUCTION

E4 Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
3. GENERAL INFORMATION
• The installation of the heater must conform
•
WARNING:
•
manual:
Number Related Subject
DO NOT EXCEED 1/2 PSI INLET PRESSURE TO HEATER
WARNING:
Table 1. BTU Ratings and Supply Pressures

Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
1. GENERAL INSTALLATION INFORMATION
AND REQUIREMENTS
EXHAUST
VENT CEILING
14”
MINIMUM
16”
MINIMUM
48”
MINIMUM
OPEN
WORKSHOP DOOR
HEATER
WALL BRACK-
ET
16”
MINIMUM
14-1/2”
FLOOR LINE
30
o
Figure 2. Installation Clearances to Combustible Surfaces
Table 3. Installation, Ventilation and Mounting Information
o
o
CHAPTER II
HEATER INSTALLATION

Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
•
•
minimum clearances or contact any heater
•
•
uninsulated entry doors and windows will
must
•
•
•
•
•
•
to a cold exterior wall without an insulated
•
•
•
distance that is farther from the heater than the
2. HEATER MOUNTING INSTRUCTIONS
mount the heater as follows:
the wall in its elected location and trace its

Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
as follows:
3 for dimensions, locate a stud, and drill two
CEILING
HEATER
24” MIN
9”
58”
FLOOR
THERMOSTAT (SEE INSTRUCTIONS
INCLUDED WITH THERMOSTAT
#6 X 1” SHEET METAL SCREWS
(2 REQUIRED - INCLUDED WITH
THERMOSTAT)
THERMOSTAT CABLE
(SEE FIGURE 4)
1/4” X 2-1/2” LONG
LAG SCREWS
(2 REQUIRED)
GAS
CONTROL
VALVE
1/2” NPT GAS INLET
(DO NOT EXCEED 1/2 PSI)
HEATER
REFLECTOR
FLUE
DEFLECTOR
1/4”-20x3/4” HEX-
HEAD BOLT
MOUNTING
CLIP
1/4”-20
HEX NUT
HEATER WALL
MOUNTING
BRACKET
PREDRILLED
HOLES
FINISHED
SIDE
UNFINISHED
SIDE
FLANGE
the instructions that come with the thermostat for
included with the thermostat, and mount the
Figure 3. Heater Mounting Information

E8 Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
3.2 Piping Requirements
•
•
Figure 5. Pipe Compound Application
•
•
•
LEAVE 2 THREADS BARE
USE MODERATE AMOUNT OF PIPE DOPE
3/4” MAXIMUM
THREAD LENGTH
1/2” BLACK PIPE
GAS VALVE BODY
1/2” MAXIMUM
DEPTH OF IN-
SERTS INTO GAS
VALVE
3. CONNECTING HEATER TO GAS SUPPLY
WARNING:
3.1 Gas Supply Requirements
•
WARNING:
•
•
WARNING:
Figure 4. Connection Diagram
Figure 6. Gas Valve Connection Requirements
POWERPILE GAS VALVE
POWERPILE GENERATOR
WIRE
SIZES
MAXIMUM
LENGTH
2 WIRE
CABLE
NO. 18
NO. 16
NO. 14
15 FEET
30 FEET
50 FEET
CAUTION:
Never connect powerpile gas
valve or thermostat to line voltage
or a transformer
Factory Wired
Thermostat Wires

Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
3.3 Piping Installation
WARNING: Failure to ensure that male threads
SUPPLY
LINE
SHUTOFF
VALVE
1/2”
TEE
3”
CAP
NIPPLE HEATER
RIGID PIPE WITH
UNION OR A FLEXIBLE CON-
NECTOR TO HEATER
Figure 7. Typical Piping Installation
NOTE:
1. ONLY USE A PIPE COMPOUND
WHICH IS RESISTANT TO
LIQUIFIED GASES ON LP
INSTALLATIONS.
2. FITTINGS SHOWN ARE NOT
INCLUDED WITH HEATER.
WARNING:

Installation instructions and Owner’s Manual
Mr. Heater / Infrared Workshop Heater
MANUAL GAS
CONTROL
KNOB
PILOTSTAT
POWER UNIT
PRESSURE
REGULATOR
ADJUSTMENT
STANDARD
PRESSURE
REGULATOR
PILOT GAS OUTLET
(PRESSURE TAPPING
DIRECTLY BENEATH)
PILOT FLOW ADJUSTING SCREW
(BENEATH COVER SCREW)
WRENCH
BOSS
GAS
INLET
Figure 9. Gas Valve Components
2. HEATER STARTUP
WARNING:
CHAPTER III
HEATER OPERATING
INSTRUCTIONS
1. OPERATING SAFETY INSTRUCTIONS
WARNING: When used without fresh air, heater
WARNING
WARNING:
WARNING: CARBON MONOXIDE POISONING
MAY LEAD TO DEATH.
WARNING: DO NOT USE MATCH OR OTHER
FLAME FOR LEAK TESTING.
CAUTION
CAUTION: This heater is for indoor installation
NOTE