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WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death. Read the installation,
operating and maintenance instructions
thoroughly before installing or servicing this
equipment.
IMPORTANT
The use of this manual is specifically intended
for a qualified installation and service agency.
A qualified installation and service agency must
perform all installation and service of these
appliances.
General Information
Installation and service instructions in this manual are applicable
to model HHD, low profile hot water unit heaters, which should
be installed in their proper applications for their most effective
function as heating units.
The water coils are warranted for operation at water pressures
up to 150 psi and temperatures up to 200°F.
Motors are designed for continuous duty. They can operate in a
maximum ambient temperature of 104°F (40°C).
The unit heaters are listed by ETL as certified. Units not
approved for use in potable water systems.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
INSTALLATION AND SERVICE MANUAL
HOT DAWG H2O® - Low Profile Hot Water Unit Heater
THIS MANUAL IS THE PROPERTY OF THE OWNER
Inspection On Arrival
1. Inspect unit upon arrival. In case of damage, report it
immediately to transportation company and your local factory
sales representative.
2. Check rating plate on unit to verify that power supply meets
available electric power at point of installation.
3. Inspect unit received for conformance with description of
product ordered (including specifications where applicable).
Table of Contents
General Information .............................................................. 1
Inspection on Arrival ............................................................. 1
Special Precautions .............................................................. 2
SI (Metric) Conversion Factors ............................................. 2
Installation ......................................................................... 3-6
Unit Location ..................................................................... 3
Unit Mounting ................................................................. 4-5
Hot Water Piping ............................................................... 6
Electrical Connections ...................................................... 6
Start-Up Procedure.......................................................... 7-10
Prior to Operation.............................................................. 7
Initial Start-up .................................................................... 7
Typical Sequence of Operation ......................................... 7
Troubleshooting ................................................................ 7
Blower Removal Instructions ....................................... 8-10
Unit Data........................................................................ 11-13
Dimensions ..................................................................... 11
Electrical Data ................................................................. 11
Mechanical Data ............................................................. 11
Performance Data ........................................................... 12
Maintenance/Replacement Parts ....................................... 13
Warranty ................................................................Back Page
1-500.5
5H0815010000
December, 2023
Model HHD
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Summary of Contents for Modine Manufacturing HHD
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Page 1: Table Of Contents
Start-Up Procedure............7-10 Installation and service instructions in this manual are applicable Prior to Operation.............. 7 to model HHD, low profile hot water unit heaters, which should Initial Start-up ..............7 be installed in their proper applications for their most effective Typical Sequence of Operation ......... -
Page 2: Special Precautions
Modine Manufacturing Company. Refer to the rating plate 6. Never leave the unit filled with water in a building without on the appliance for complete appliance model number, heat unless antifreeze has been added. -
Page 3: Installation
Note that the labels on the front of the unit will be upside down. New stickers can be purchased from Modine. CAUTION Figure 3.1 - Model HHD Mounting Orientations 1. All literature shipped with this unit should be kept for future use for servicing or service diagnostics. Leave manual with the owner. -
Page 4: Unit Mounting
INSTALLATION - UNIT MOUNTING With the brackets installed on the unit, the unit can be CAUTION installed to the ceiling joists or trusses as follows (refer to Figure 5.2): Do not install units below 7' measured from the bottom of •... - Page 5 INSTALLATION - UNIT MOUNTING Figure 5.1 - Unit Suspension Figure 5.2 Bracket Installation for Vertical Air Delivery Model HHD Mounting Orientations Bracket Orientation for 10” or 12” Deep Joists 11.96 Speed Control 11.96 ...
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Page 6: Hot Water Piping
INSTALLATION - HOT WATER PIPING / ELECTRICAL CONNECTIONS HOT WATER PIPING ELECTRICAL CONNECTIONS CAUTION WARNING 1. Disconnect power supply before making wiring connections 1. Units are designed for use in heating applications with to prevent electrical shock and equipment damage. ambient temperatures between 40°F and 100°F. -
Page 7: Start-Up Procedure
START UP PROCEDURE / TROUBLESHOOTING START-UP PROCEDURE INITIAL START-UP Set thermostat to lowest position. IMPORTANT Turn on power supply to unit. Open field installed supply and return shut-off valves. 1. Start-up and adjustment procedures should be performed by a qualified service agency. Raise thermostat setting to desired position. -
Page 8: Blower Removal Instructions
BLOWER REMOVAL INSTRUCTIONS Figure 8.1 Remove sheet metal screws, Size #10 X 1/2", Qty-4 From the Access Panel as shown in Fig 8.1. Figure 8.2 Remove the tilted Access Panel by moving it towards back by 1” as shown in Fig 8.2. 1-500.5... - Page 9 BLOWER REMOVAL INSTRUCTIONS Figure 9.1 Remove the 2 inside screws, Size #10 X 1/2", Qty-2 from Fan Board Assembly as shown in Fig 9.1. Steps 1 to 3 needs to be repeated on the Control Panel Side. Figure 9.2 Remove Plug to separate Motor & Ground wire from the Control Panel as shown in Fig 9.2 1-500.5...
- Page 10 BLOWER REMOVAL INSTRUCTIONS Figure 10.1 Now the Fan Board Assembly will slide out from either side of the casing as shown in fig 10.1. Caution: - Weight of Fan Board Assembly is ap- proximately 27 lbs. 1-500.5...
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Page 11: Unit Data
UNIT DATA Figure 11.1 Dimensions (inches) Table 11.1 – Unit Mechanical/Electrical Data Unit Size Coil High Capacity – 2 Row Face Area, ft² 1.625 Standard Coil Connections 1/2" NPT Approximate Coil Volume (Gallons) 0.40 Blowers (Direct Drive) (Qty) - Diameter x Width (Inches) (2) –... -
Page 12: Performance Data
PERMORMANCE DATA Horizontal Air Delivery Models — Two Styles Table 12.1 – Performance Data Entering Water Temperature (60°F Entering Air Temperature) Airflow 120°F 140°F 160°F 180°F 200°F Model Size (CFM) (ft. Water) Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr 17,200 22,900 28,600 34,400 40,100 22,400... -
Page 13: Maintenance/Replacement Parts
To check most of the Possible Remedies in the troubleshooting guide listed in Table 7.1, refer to the applicable sections of the Model Type manual. HHD = Hot Dawg H2O All installation and service of these units must be performed by MBH Rating a qualified installation and service agency. - Page 14 THIS PAGE INTENTIONALLY LEFT BLANK 1-500.5...
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Page 15: Warranty
BUYER HEREBY ACKNOWLEDGES THAT ITS REMEDIES This Warranty (the “Warranty”) shall apply to Products FOR BREACH OF THIS WARRANTY, EXCLUSIVE OF ALL (as defined below) sold by Modine Manufacturing Company, a Wisconsin corporation (“Seller”) to you (“Buyer”). OTHER REMEDIES PROVIDED BY LAW, ARE LIMITED AS DESCRIBED ABOVE. - Page 16 All Products 2 YEARS 30 MONTHS Burners, Sheet Metal As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and specifications without notice. Modine Manufacturing Company 1500 DeKoven Avenue Racine, WI 53403 Phone: 1.800.828.4328 (HEAT) ©...
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Do you have a question about the HHD and is the answer not in the manual?
Questions and answers
Does the Hot Dawg have a filter or require maintenance?
The Modine Manufacturing Hot Dawg HHD does not include filters, as filters are specifically excluded from the warranty. However, it does require maintenance. At a minimum, before the start of each heating season, certain inspections and servicing must be performed, such as turning off electrical power and checking components.
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