Mr. Heater MH40NG, MH40LP Operating Instruction

Operational Instructions Only - No Parts List

Operating Instructions and Owner’s Manual

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.

GAS FIRED INFRA-RED SPACE HEATER

MR. HEATER

Model	MH40NG
	MH40LP

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

—­ Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

—WHAT TO DO IF YOU SMELL GAS

•Shut off gas supply

•Do not try to light appliance

•Do not touch an electrical switch; do not use any phone in your building

•Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions

•If you cannot reach your gas supplier, call the fire department

—Installation and service must be performed by a qualified installer, service agency or the gas supplier.

This is an unvented gas-fired portable heater. It uses air (oxygen) from the area in which it is used.

Adequate combustion and ventilation air must be provided. Refer to page 5.

ENERCO GROUP INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000

04/08 18682 Rev. A

WARNING:

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment. For assistance or additional information consult a qualified installer, service agency, or gas supplier.­

WARNING:

When used without fresh air, heater may give off CARBON MONOXIDE, an odorless poisonous gas. OPEN WINDOW AN INCH OR TWO FOR FRESH AIR WHEN USING HEATER.

WARNING:

This heater is equipped with a PILOT LIGHT SAFETY SYSTEM. DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM.

WARNING:

If heater shuts off, do not relight until you provide fresh air. If heater keeps shutting off, have it serviced. Keep burner and control clean. Open door for 5 minutes.

Maintain clearances as shown in Figure 2 or on heater nameplate.

•DO NOT USE MATCH OR OTHER FLAME FOR LEAK TESTING.

•DO NOT EXCEED 1/2 PSI INLET PRESSURE TO HEATER.

DANGER:

Carbon monoxide poisoning may lead to death.­

Carbon Monoxide Poisoning:

Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.

CAUTION:

•Never connect gas valve or thermostat to line voltage or a transformer.

•If the infra-red color of the grid becomes dull when the building furnace is operating, consult gas supplier on correct gas supply piping sizes.

•This heater is for indoor installation only!

NOTE

Gasket binder material used in this heater assembly will temporarily emit an odor and/or vapor. This condition will clear up in approximately 20 minutes and thereafter will not reoccur. Refer to Chapter 9 for ventilation.

THE STATE OF CALIFORNIA REQUIRES THE FOLLOWING WARNING:

WARNING:

Combustion by-products produced when using this product contain carbon monoxide, a chemical known to the State of California to cause cancer and birth defects (or other reproductive harm).

TABLE OF CONTENTS

1. GENERAL INFORMATION.........................................................		3	9. VENTILATION..........................................................................	5
2.	CLEARANCES..........................................................................	3	10. START-UP PROCEDURE...........................................................	5
3.	SUSPENSION...........................................................................	4	11. HEATER SHUTDOWN..............................................................	5
4.	GAS SUPPLY............................................................................	4	12. OPERATOR MAINTENANCE INSTRUCTIONS............................	5
5.	PIPING REQUIREMENTS...........................................................	4	13. REPLACING THE GAS VALVE UNIT..........................................	7
6.	GAS PRESSURE........................................................................	4	14. FREQUENCY OF OPERATOR CHECKS......................................	7
7. ELECTRICAL.............................................................................		4	MH40 REPLACEMENT PARTS LIST................................................	7
8.	THERMOSTAT & LOCATION.....................................................	4

Model # MH40NG/LP

2 Installation Instructions and Owner’s Manual

1. GENERAL INFORMATION

a.Your heater comes fully assembled and is tested at the factory for proper gas and input as stated on the name plate.

b.Before proceeding with the installation, be sure to inspect for damages. Freight company must be notified of any damages and request that the inspection be made. MR. HEATER will send replacement parts for damaged parts only after receiving a signed inspection report to prove the liability of the freight company.

c.Do not attempt to operate heater with any other gas than that indicated on the heater name plate.

d.The installation of heater must conform with local building codes, or in absence of local codes, with the National Fuel Gas Code, ANSI Z223.1a/NFPA54, and Standard for Storage and

Handling of Liquefied Petroleum Gases, ANSI/NFPA 58.

e.Canadian installations must comply with CAN/CGA-B149.1.2 Gas Code which can be purchased from the CSA (Canadian Standards Association) website @ http://www.csa.ca or by calling 1-800-463-6727.

f.Plugged 1/8” N.P.T. Test Gage Connection is located on the Heater Gas Valve or a ¼” N.P.T. Connection is located on the outside of the Cast Venturi.

g.Contact the factory when appliance is to be installed at high altitudes. Factory supplies high-altitude conversion kits with instructions and data plates.

For additional information, contact;

MR. HEATER CORPORATION

CUSTOMER SERVICE DEPT. CLEVELAND, OHIO 1-800-251-0001

*The following extra NFPA manuals are helpful when installing MR. HEATER in a location not anticipated in this manual:

Number	Related Subject
NFPA 88	Clearances to Combustible Surfaces
NFPA 409	Clearances to Combustible Surfaces

DO NOT EXCEED ½ PSI INLET PRESSURE TO HEATER

2. CLEARANCES

Minimum clearances to combustibles (Refer to Table 3). Provide adequate clearance to combustibles, see Table 3. Also between control end of heater for servicing and minimum on top and sides for ventilation and combustion air supply.

A minimum clearance of 8’ above floor for public garages in accordance with ANSI/NFPA No. 409 most recent edition, or Table 3; the larger dimension of ANSI/NFPA No. 409 or Table 3 is to be used.

*When selecting installation locations for MR. HEATER ensure that the opening of any exterior or interior doors or windows will not violate clearances or contact any heater components.

Table 1. BTU Ratings and Supply Pressures

MODEL

BTU/HR. RATING

GAS SUPPLY PRESSURE (W.C.)

ORIFICE

NO.

SIZE

GAS

MIN.

MAX.

MANIFOLD

NATURAL

PROPANE

NAT.

L.P.

NAT.

L.P.

NAT.

L.P.

NAT.

L.P.

MH/HS40NG

40,000

—

6.8” W.C.

—

7” W.C.

—

5.8”

—

37

—

MH/HS40LP

—

40,000

—

11” W.C.

—

14” W.C.

—

10”

—

50

Table 2. Heater Dimensions and Orifice Sizes

MODEL	OPERATING	ORIFICE SIZE		INPUT			SIZE
NO.	PRESSURE	BURNER	PILOT	BTU/H	WIDTH	LENGTH		HEIGHT	WEIGHT
MH/HS40NG	6.8”w.c.	37	.023	40.000	19-1/4”	30-1/4”		12”	25 lbs.
MH/HS40LP	10”w.c.	50	.015	40,000	19-1/4”	30-1/4”		12”	25 lbs.

Table 3. Installation, Ventilation and Mounting Information

	BTU/HR. RATING		NORMAL
MODEL	GAS		MOUNTING	CLEARANCES TO COMBUSTIBLE SURFACES
NO.	NAT.	L.P.	POSITION	TOP	SIDES	BACK	BELOW
MH/HS40NG	40,000	—	HORIZ-30˚	34”	30”	30”	68”
MH/HS40LP	—	40,000	HORIZ-30˚	34”	30”	30”	68”

Model # MH40NG/LP

3

Installation Instructions and Owner’s Manual

	3. SUSPENSION		NOTE:
			1. Only Use A Pipe Compound Which Is Resistant To Liquefied
	Heater has four mounting holes, two on each end, for attaching		Gases On L.P. Installations.
	rod, chain, or angle iron brackets and shall be safely and		2. Fittings Shown Are Not Included With Heater.
	adequately fixed in position independent of gas and electric supply
	lines.
	4. GAS SUPPLY
	Provide adequate gas supply for rated input of each heater using
	American Standard Installation of gas piping and gas appliances
	in building. ANSI Z223.1a/NFPA 54 pamphlet, Table C-3 shows
	capacity of pipe of different diameters and lengths in cubic feet
	per hour natural gas with pressure drop of 0.3 inches, specific
	gravity of 0.60. For liquefied Petroleum Gas (LP) capacity refer
	to Figures 3. On threaded pipes use a pipe compound which is
	resistant to the action of all gases.				Sediment trap
	If gas lines are to be pressure tested with compressed air,
			Figure 3. Typical Piping Installation
	disconnect each heater to prevent control damage and cap
	outlets. After reconnecting all heaters, purge gas lines of air
	and check all connections for leaks using soap solution. Liquid		6. GAS PRESSURE
	dishwashing detergent is an excellent leak detector.
			When a higher than the maximum recommended gas pressure is
			being maintained at the main gas line, a separate regulator must
	5. PIPING REQUIREMENTS		be installed ahead of the heater. Refer to Table 1 on page 3 for
	All piping installed must comply with local codes and ordinances		maximum allowable pressure for stated heater model and gas.
	or with the National Fuel Gas Code, ANSI Z223.1 (NFPA 54),		See heater rating plate for minimum gas supply pressure “For the
	whichever takes precedence. When installing piping, the following		Purpose of Input Adjustment.”
	requirements must be taken into consideration:		On a multiple heater installation in may be possible to use one
	• Use new properly reamed black pipe free from chips.		large capacity regulator or an individual regulator for each heater.
	• Apply a good quality pipe compound to all male threads prior		Nevertheless, it is recommended practice to make the entire pipe
	to assembly. If L.P. gas is the fuel, ensure that pipe compound		system a loop.
	is resistant to L.P. gas. DO NOT USE TEFLON ™ tape.		Contact your local representative or the factory for proper gas
	• Prior to installation, apply pipe compound to all male threads
	as shown in Figure 1.		pressure reducing design stage.
	USE MODERATE AMOUNT OF PIPE DOPE		7. ELECTRICAL
			NEVER CONNECT POWERPILE GAS VALVE OR THERMOSTAT TO
			LINE VOLTAGE OR A TRANSFORMER.
			8. THERMOSTAT & LOCATION
	LEAVE FIRST 2 THREADS BARE		Make sure that the electrical characteristics of the thermostat
			match those of the heater controls. For best results thermostat
	Figure 1. Pipe Compound Application		should be positioned 5 ft. above floor where air can circulate
			freely around it. DO NOT MOUNT directly to cold-side wall, in
	• Male threads on pipe to be installed into gas valve shall meet		direct drafts, or directly beneath the infra-red heater.
	the requirements of Figure 2. Threads longer than those		Ensure that the selected thermostat location meets all of the
	shown in the figure may cause gas valve distortion and mal-
	function.		above requirements. Refer to the instructions that come with
	• A sediment trap meeting the typical requirements of Figure 3		the thermostat for additional general information and mounting
	shall be installed in the line to the gas valve.		instructions.
	• A dedicated shutoff valve for the heater must be installed in		If the wall is of stud and wallboard construction, then use the #6
	the gas supply line.
			by 1 inch sheet metal screws, included with the thermostat, and
	¾” MAXIMUM		mount the thermostat in the selected location.
	½”
			If wall is brick or masonry, the appropriate anchors must be
		Figure 2.	obtained to accommodate the thermostat mounting screws. Use
			the back plate of the thermostat as a template to mark the hole
		Gas valve
			location, drill appropriate size anchor holes, install the anchors and
		connection
	½” MAXIMUM		securely attach the thermostat using the mounting screws.
		requirements
	Model # MH40NG/LP		4 Installation Instructions and Owner’s Manual

Connect the thermostat wires to gas valve as shown in Figure 4.				MANUAL GAS	PRESSURE REGULATOR
				CONTROL KNOB
					ADJUSTMENT
THERMOSTAT
					STANDARD
					PRESSURE
					REGULATOR
					(Incoming pressure
	POWERPILE GAS VALVE			WRENCH	not exceed 13” W.C.)
				BOSS
						PILOT GAS
						OUTLET
				GAS INLET		(PRESSURE
						TAPPING
				PILOTSTAT POWER	PILOT FLOW	DIRECTLY
						BENEATH)
				UNIT	ADJUSTING
				Figure 6. Gas Valve	SCREW
	POWERPILE GENERATOR				(BENEATH
				Components
Figure 4 connection diagram					COVER SCREW)
				Release manual gas control knob and turn to ON. Reset
9. VENTILATION				thermostat to desired temperature.
a. The minimum intake and exhaust air openings shall provide				NOTE:
for not less than 400 CFM for every 100,000 BTU input except
				During the initial startup of MR. HEATER an odor and, perhaps,
that the infiltration area may be included in the intake area.
				some vapor will come from the heater. This is the gasket binding
b. Where natural (gravity) ventilation is provided for exhaust, the
				material emitting this odor and/or vapor. After approximately 20
openings must be distributed above the heaters (preferably at
				minutes this odor will disappear and not occur again.
the peak of the roof) and the areas of openings shall not be
less than 300 square inches for every 100,000 BTU input.
				11. SHUTDOWN
10. START-UP PROCEDURE				1. Turn thermostat to OFF.
OPEN THE GAS SUPPLY VALVE OR VALVES.				2. Turn manual gas control knob on gas valve to PILOT position.
				3. Partially depress knob and rotate to the OFF position.
				4. Close gas supply valves.
				12. OPERATOR MAINTENANCE
				INSTRUCTIONS
				1. TROUBLESHOOTING
				a. Table 4 lists the common malfunctions which you may find
				during the operation or maintenance of your heater.
				b. For additional information refer to Honeywell Field Bulletin
Figure 5. Thermostate controls				enclosed in the heater carton.
				c. In the event, results cannot be obtained after performing all
Set the thermostat to the OFF position. See Figure 5. If the				listed solutions, call your Mr. Heater dealer, or the factory
				customer service department at 1-800-251-0001.
manual gas control knob on the gas valve is not in the OFF
position, partially depress the knob and rotate to the OFF position.				2. ADJUSTING THE PILOT FLAME
See Figure 6.
				The pilot flame should envelope 3/8 to ½ in. (10 to 13mm) of the
Wait 5 minutes to allow gas that may have accumulated in the				tip of the thermocouple or generator. To adjust the pilot flame,
				refer to Figure 7.
main burner to escape (especially important after installation).
Turn the manual gas control knob to the PILOT position.				PROPER FLAME ADJUSTMENT
					3/8 TO ½ INCH
Depress the manual gas control knob. Using a match, light the					(10 TO 13 MILLIMETERS)
pilot light. See Figure 6. Hold the knob down for approximately					THERMOCOUPLE
30 seconds to allow any air in gas lines to pass through pilot and,
once the pilot is lit, allow the thermocouple to heat up enough to
activate the safety valve in an open position.				Figure 7. Proper flame adjustment
	Model # MH40NG/LP	5		Installation Instructions and Owner’s Manual