Instructions / Assembly

ManualsBrandsModine ManualsGarage HeatersHot Dawg 125,000 BTU Natural Gas Garage Ceiling Heater

THIS MANUAL IS THE PROPERTY OF THE OWNER.

PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.

Inspection on Arrival

1. Inspect unit upon arrival. In case of damage, report it

immediately to the transportation company and your local

Modine sales representative.

Check rating plate on unit to verify that power supply meets

available electric power at the point of installation.

3. Inspect unit upon arrival for conformance with description of

product ordered (including specifications where applicable).

Table of Contents

Inspection on Arrival ................................. 1

Special Precautions ................................. 2

SI (Metric) Conversion Factors......................... 3

Before You Begin ................................... 3

Unit Location....................................... 4

Combustible Material and Service Clearances ......... 4

Unit Mounting .................................. 5

Unit Installation ................................. 5

Venting ....................................... 6

Gas Connections............................... 12

High-Altitude Accessory Kit ....................... 13

Electrical ..................................... 15

Wiring/Blower Speed Adjustment .................. 16

Operation ........................................ 17

Unit Components .................................. 18

Dimensions....................................... 19

Service/Troubleshooting............................. 20

Unit Wiring Diagram ................................ 21

Model/Serial Number/Replacement Parts ............... 22

Commercial Warranty........................Back Cover

INSTALLATION AND SERVICE MANUAL

gas-fired unit heaters

model HD and HDB

6-583.8

5H8000400000

All models approved for use in California by the CEC and

in Massachusetts. Unit heater is certified for residential and

commercial applications.

WARNING

1. Improper installation, adjustment,

alteration, service, or maintenance can

cause property damage, injury, or death,

and could cause exposure to substances

which have been determined by various

state agencies to cause cancer, birth

defects, or other reproductive harm. Read

the installation, operating, and maintenance

instructions thoroughly before installing or

servicing this equipment.

2. Do not locate ANY gas-fired units in areas

where chlorinated, halogenated, or acid

vapors are present in the atmosphere.

These substances can cause premature

heat exchanger failure due to corrosion,

which can cause property damage, serious

injury, or death.

FOR YOUR SAFETY

The use and storage of gasoline or other

flammable vapors and liquids in open

containers in the vicinity of this appliance

is hazardous.

FOR YOUR SAFETY

WHAT TO DO IF YOU SMELL GAS:

1. Open windows.

2. Do not try to light any appliance.

3. Do not touch any electrical switch; do

not use any phone in your building.

4. Immediately call your gas supplier

 fromaneighbor’sphone.Followthegas

 supplier’sinstructions.Ifyoucannotreach

your gas supplier, call your fire department.

IMPORTANT

The use of this manual is specifically

intended for a qualified installation and

service agency. All installation and service

of these units must be performed by a

qualified installation and service agency.

November, 2014

Summary of content (24 pages)

PAGE 1
6-583.8 5H8000400000 November, 2014 installation and service manual gas-fired unit heaters model HD and HDB All models approved for use in California by the CEC and in Massachusetts. Unit heater is certified for residential and commercial applications. FOR YOUR SAFETY WARNING 1.
PAGE 2
special precautions SPECIAL PRECAUTIONS THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN THIS MANUAL MUST BE FOLLOWED TO PROVIDE SAFE, EFFICIENT, AND TROUBLE-FREE OPERATION. IN ADDITION, PARTICULAR CARE MUST BE EXERCISED REGARDING THE SPECIAL PRECAUTIONS LISTED BELOW. FAILURE TO PROPERLY ADDRESS THESE CRITICAL AREAS COULD RESULT IN PROPERTY DAMAGE OR LOSS, PERSONAL INJURY, OR DEATH. these instructions Subject to any more restrictive local or national codes. hazard intensity levels 1.
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special precautions / SI (METRIC) CONVERSION FACTORS BEFORE YOU BEGIN CAUTION 17. When leak testing the gas supply piping system, the appliance and its combination gas control must be isolated during any pressure testing in excess of 14" W.C. (1/2 psi). 18. The unit should be isolated from the gas supply piping system by closing its field installed manual shut-off valve. This manual shut-off valve should be located within 6' of the heater. 19. Turn off all gas before installing appliance. 20.
PAGE 4
unit location unit location Table 4.1 Clearances danger Unit Side Top and Bottom Access Side Non-Access Side Rear Vent Connector Appliances must not be installed where they may be exposed to a potentially explosive or flammable atmosphere. CAUTION 1. Clearances to combustible materials are critical. Be sure to follow all listed requirements. 2.
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unit mOUNTING Figure 5.2 - Unit Heater Turned 180° (30-75 units only) (Access panel and heated air outlet change sides) CAUTION 1. Do not install units below 7' measured from the bottom of the unit to the floor in commercial applications (unless unit is properly guarded to provide user protection from moving parts) and 5' measured from the bottom of the unit to the floor in residential applications. 2. Be sure no obstructions block air intake and discharge of unit heaters. 3.
PAGE 6
installation - venting WARNING 1. Gas fired heating equipment must be vented - do not operate unvented. 2. A built-in power exhauster is provided - additional external power exhausters are not required or permitted. 3. If an existing heater is being replaced, it may be necessary to resize the venting systems. Improperly sized venting systems can result in vent gas leakage or the formation of condensate. Refer to the National Fuel Gas Code ANSI Z223.1 (NFPA 54) or CSA-B149.
PAGE 7
installation - venting diameter is necessary. If there is 6' or more of vent pipe in the open space between the appliance and where the vent pipe passes through the wall or floor, the thimble need only be 2" greater than the diameter of the vent pipe. If a thimble is not used, all combustible material must be cut away to provide 6" of clearance.
PAGE 8
installation - venting Section B – Vertical Vent System Installation B1. This section applies to vertically vented Category I vent systems and is in addition to “Section A – General Instructions – All Units”. B2. Vertical vent systems terminate vertically, and must be sized in accordance with the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) - latest edition. B3.
PAGE 9
installation - venting • For single wall vent pipe and 10' or greater horizontal distance to any portion of a building, the vent must terminate at least 3' (2' for non-residential installations) above the highest point where it passes through a roof of a building and at least 2' higher than any portion of a building within a horizontal distance of 10' (see Figure 9.1). Figure 9.
PAGE 10
installation - venting Section C – Horizontal, Category III Vent System Installation C7. W hen vented horizontally, maintain a 1/4" per foot rise away from the heater and place a drip leg with clean out near the unit as shown in Figure 10.2. Where local authorities have jurisdiction, a 1/4" per foot downward slope is acceptable with a drip leg and clean out near the exit of the vent as shown in Figure 10.3, or allow the condensate to drip out the end. C1.
PAGE 11
installation - venting Additional Requirements for Common Venting: 1. The common vent system and all attached appliances must be Category I. 2. The vent connector should be routed in the most direct route from the units to the common vent. 3. Where 2 or more vent connectors enter a common gas vent or chimney flue, the smaller connector shall enter at the highest level consistent with the available head room or clearance to combustible material. 4.
PAGE 12
installation - gas connections Figure 12.1 - Recommended Sediment Trap/Manual Shut-off Valve Installation - Side or Bottom Gas Connection ➀ WARNING 1. All field gas piping must be pressure/leak tested prior to operation. Never use an open flame. Use a soap solution or equivalent for testing. 2. G as pressure to appliance controls must never exceed 14" W.C. (1/2 psi). 3.
PAGE 13
installation - HIGH ALTITUDE ACCESSORY KIT HIGH ALTITUDE ACCESSORY KIT Modine’s gas-fired equipment standard input ratings are certified by ETL. For elevations above 2,000', ANSI Z223.1 requires ratings be reduced 4 percent for each 1000'. above sea level. For units in Canada, CSA requires that ratings be reduced 10 percent at elevations above 2,000'.
PAGE 14
installation - HIGH ALTITUDE ACCESSORY KIT If the heating value of the gas being supplied is different than the values shown in Tables 13.1 and 13.2, use the following equation to determine the appropriate manifold pressure for the altitude and gas heating value being supplied. Equation 14.1 - Manifold Pressure for Derated Gas WHERE: MPACT = Manifold Pressure (in. W.C.) at Altitude – Manifold pressure setting for the heater being installed BTUTBL = BTU/ft3 Content of Gas – Obtained from Tables 13.
PAGE 15
installation - ELECTRICAL connections ELECTRICAL CONNECTIONS 2. Two copies of the unit wiring diagram are provided with each unit. One is located in the side access control compartment and the other is supplied in the literature packet. Refer to this diagram for all wiring connections. 3. M ake sure all multi-voltage components (motors, transform ers, etc.) are wired in accordance with the power supply voltage. 4. The power supply to the unit must be protected with a fused or circuit breaker switch.
PAGE 16
installation - ELECTRICAL connections Blower Curve Models (HDB 60-125 Only) ELECTRICAL CONNECTIONS Speeds Location of thermostat should be determined by heating requirements and be mounted on an inside wall about 5' above floor level where it will not be affected by heat from the unit or other sources, or drafts from frequently opened doors. See instructions packed with thermostat. Low Medium HDB 60 70 The blowers used on Modine HDB units are direct drive and equipped with three speed motors.
PAGE 17
installation - operation OPERATION Prior to Operation important 1. To prevent premature heat exchanger failure, observe heat exchanger tubes. If the bottom of the tubes become red while blower and furnace are in operation, check to be sure the blower has been set to the proper RPM for the application. Refer to page 16 for wiring adjustments for blower motors. 2. Start-up and adjustment procedures must be performed by a qualified service agency.
PAGE 18
CONTROL OPERATING SEQUENCE / unit components CONTROL OPERATING SEQUENCE Upon a call for heat from the thermostat, power is supplied to the power exhauster motor. The unit will go through a purge period and then the direct spark igniter will be energized. At the same time, the main valve in the combination control valve will open to allow gas to flow to the burners. If the fan motor has not all ready started it will start shortly.
PAGE 19
DIMENSIONAL DATA - MODEL HD/HDB Propeller Units - Model HD Blower Units - Model HDB Figure 19.2 - Dimensional Drawings - Model HDB Figure 19.1 - Dimensional Drawings - Model HD 14.9" BETWEEN 3/8"-16 MOUNTING HOLES (MODEL SIZES 100 AND 125 ONLY) MOUNTING HOLES TYP 3/8 x 1" LONG 14.9" BETWEEN 3/8"-16 MOUNTING HOLES (MODEL SIZES 100 AND 125 ONLY) G MOUNTING HOLES TYP 3/8 X 1" LONG ADJUSTABLE LOUVERS 3.5" ADJUSTABLE LOUVERS G 3.5" E OPENING E OPENING C C J J I I ACCESS VIEW ACCESS VIEW 13.
PAGE 20
service / maintenance / troubleshooting warning When servicing or repairing this equipment, use only factoryapproved service replacement parts. A complete replacement parts list may be obtained by contacting the factory. Refer to the rating plate on the appliance for complete appliance model number, serial number, and company address. Any substitution of parts or controls not approved by the factory will be at the owner’s risk. CAUTION 1.
PAGE 21
unit wiring Wiring Diagram Selection Since internal or factory wiring may vary depending on the controls manufacturer, the wiring diagrams must be appropriately selected with the proper gas valve and ignition type. The following wiring diagram represents a unit equipped with a single or two stage gas valve and direct spark ignition.
PAGE 22
model & SERIAL number / replacement parts Figure 22.
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THIS PAGE INTENTIONALLY LEFT BLANK 6-583.
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commercial Warranty Seller warrants its products to be free from defects in material and workmanship, EXCLUSIVE, HOWEVER, of failures attributable to the use of materials substituted under emergency conditions for materials normally employed.