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HORIZONTAL STEAM AND HOT WATER UNIT HEATERS
ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE
OF GAS AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT
POINT OF INSTALLATION. RECORD THE UNIT MODEL AND SERIAL No.(s) IN THE SPACE PROVIDED.
RETAIN FOR FUTURE REFERENCE.
Model No.
service or maintenance can cause property damage,
injury or death. Read the installation, operating and
maintenance instructions thoroughly before installing or
servicing this equipment.
Installer Please Note: This equipment has been tested and
inspected. It has been shipped free from defects from our
factory. However, during shipment and installation, problems
such as loose wires, leaks or loose fasteners may occur. It is
the installer's responsibility to inspect and correct any
problems that may be found.
Inspect shipment immediately when received to determine if
any damage has occurred to the unit during shipment. After
the unit has been uncrated, check for any visible damage to
the unit. Turn fan by hand to determine if damage has occurred.
If any damage is found, the consignee should sign the bill of
lading indicating such damage and immediately fi le claim for
damage with the transportation company.
260 NORTH ELM ST.
WESTFIELD, MA 01085
08/12
INSTALLATION INSTRUCTIONS & PARTS LIST
Improper installation, adjustment, alteration,
INSTALLER'S RESPONSIBILITY
RECEIVING INSTRUCTIONS
Serial No.
HIM-16
J30-05404
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Summary of Contents for Mestek 108A
- Page 1 HIM-16 J30-05404 INSTALLATION INSTRUCTIONS & PARTS LIST HORIZONTAL STEAM AND HOT WATER UNIT HEATERS ATTENTION: READ THIS MANUAL AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT POINT OF INSTALLATION.
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Page 2: Table Of Contents
TABLE OF CONTENTS GENERAL SAFETY INFORMATION ......3 ELECTRICAL CONNECTIONS ........ 17 SPECIFICATIONS Operation ............. 17 Dimensional Data ..........4 Thermostat Wiring and Location ......17 Steam Performance Data ........5 WIRING INSTALLATION .......... 18 Steam Calculations & Correction Factors ....6 OPTIONS .............. -
Page 3: General Safety Information
GENERAL SAFETY INFORMATION Failure to comply with the general Do not insert fi ngers or foreign objects into the heater or its air moving device. Do not block or tamper with the safety information may result in extensive heater in any manner while in operation or just after it property damage, severe personal injury or death. -
Page 4: Dimensional Data
DIMENSIONAL DATA Figure 3 – Serpentine Type Figure 4 – Header Type Models 108A, 118A, 125A, 136A Models 18 thru 360 NOTE: Motors are totally enclosed, thermally protected, sleeve bear- ing, with 2"(h) x 4"(w) conduit connection boxes. 3/8-16 nutserts are attached to enclosure for balanced hanging. -
Page 5: Steam Performance Data
STEAM PERFORMANCE DATA Table 3 - Header Type Models only Nom. Output Nom. Fan BTU/ Cond. E.D.R. Final Air Motor Nominal Outlet Amps Diam. Unit lbs./hr. Sq. Ft. Deg.°F Inches Size (kW) (kg/hr) (sq. m) (Deg. °C) (kW) (m/s) 115VAC† (mm) 18,000 18.0... -
Page 6: Steam Calculations & Correction Factors
STEAM CALCULATIONS AND CORRECTION FACTORS EXAMPLE: – UNIT SIZE: _________ 24 Steam Pressure ___10 PSI Entering Air Temp. __ 40°F CAPACITY A. For 2 lbs. steam, 60° entering air Read output directly from Table 3, 24,000 BTU/HR. (Ref., Std. 24). B. -
Page 7: Hot Water Performance Data
Deg. °F FT./H Sound Size 115VAC† Rating (kW) (L/s) (Deg. °C) (m/water) (kW) (m/s) 8,030 1550 0.80 (2.4) (33) (.116) (1.270) 108A 16 Watts 0.80 (.050) (.244) 6,800 1350 (2.0) (32) (.099) (1.092) 18,400 1550 2.20 (5.4) (34) (.236) (2.540) 118A 16 Watts 0.80... -
Page 8: Hot Water Calculations & Correction Factors
To obtain Pressure Loss Feet (Meters) of Water for other temperature Drops, multiply Basic loss 10.00 5.00 2.00 1.00 at 20°F (11°C) drop by Factor. *TABLE 9 — MINIMUM WATER FLOW MODEL No. 108A 118A 125A 136A MINIMUM 0.125 0.125 0.125 0.125 0.750... -
Page 9: Technical Data
TECHNICAL DATA The performance data listed in Table CATEGORY OF AREA SOUND RATING 6 includes sound ratings. The ratings Apartment, assembly hall, classrooms provide a guide in determining the churches, courtrooms, executive offi ces, acceptable degree of loudness in particular hospitals, libraries, museums, theatres. -
Page 10: Motor Data
NOTE 1: All motors are constant speed and Table 11 - TOTALLY ENCLOSED MOTOR TYPE operate at top speed as indicated in motor data. Unit Models 18 through 108, including 108A, 118A, Model 125A and 136A can be run at reduced speed 115/1/60 with addition of optional variable speed switch. -
Page 11: Location
Figure 5 MAXIMUM DISTANCE OF THROW = T Table 13 Model Maximum Approx. Max. Mounting HT. ft (m) Throw ft (m) 108A 8 (2.4) 20 (6.1) 118A 8 (2.4) 25 (7.6) Typical arrangement of unit heaters in 125A 9 (2.7) 29 (8.8) -
Page 12: Installation
INSTALLATION UNIT MOUNTING Nutserts are provided at the top of all units for Install unit heaters to meet Occupational Safety and suspension purposes. Support rods should support Health Act (OSHA) and ETL requirements. Unit heaters the total unit weight to assure that no strain is placed mounted lower than 8 feet (2.4m) from the fl... - Page 13 Figure 6A Four Point Suspension - UNIT SIZE 48/60 15-5/16 1-7/8 Shelf Mounted 16-9/16 2-1/2 Motors Only 84 & 120 19-1/16 3" 11-11/16 96/108 17-13/16 2-1/2 132/144/156 21-9/16 3-1/2 1-3/4 180/204 22-13/16 4" 240/280 26-1/16 4-1/2 10" 300/360 31-9/16 6" 1"...
- Page 14 Figure 9 High Pressure Steam "HIGH PRESSURE STEAM" D-6058...
- Page 15 "LOW PRESSURE STEAM GRAVITY" Figure 10 Low Pressure Steam Gravity D-6059...
- Page 16 Figure 11 Low Pressure Vapor Or Vacuum "LOW PRESSURE VAPOR OR VACUUM" D-6060...
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Page 17: Electrical Connections
ELECTRICAL CONNECTIONS On steam systems a low limit may be used to prevent fan from blowing cold air unless the heater has steam passing through the coil. HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC Small hot water systems could have the circulating POWER INCLUDING REMOTE pump controlled directly by the room thermostat. -
Page 18: Wiring Installation
WIRING INSTALLATION Figure 12 Figure 13 Figure 14 1 PHASE LINE 1 PHASE LINE 1 PHASE LINE MANUAL STARTING MANUAL STARTING MANUAL STARTING SWITCH SWITCH SWITCH MOTOR MOTOR MOTOR LIMIT CONTROLLER REVERSE ACTING ROOM THERMOSTAT ROOM THERMOSTAT MANUAL CONTROL WITH THERMOSTATIC CONTROL WITH THERMOSTATIC CONTROL WITH SINGLE PHASE MOTOR... -
Page 19: Options
OPTIONS VARIABLE SPEED CONTROL HORIZONTAL AND VERTICAL LOUVERS 115 Volt Only (optional) Horizontal louvers are standard on all models. Vertical The solid state speed controller may be installed at any louvers are an optional accessory on all models. Vertical convenient location and is suitable for surface or fl ush louvers are installed on built to order units or shipped type mounting. -
Page 20: Maintenance
MAINTENANCE PERIODIC SERVICE If on the job lubrication is required by the owner, use the following procedure: With the motor at a stand-still, Open all disconnect switches and remove the vent and grease plugs. Install grease fi tting secure in that position before servicing unit. Failure and add grease sparingly. -
Page 21: Replacement Parts
REPLACEMENT PARTS When ordering replacement parts Model, Model Type (IE: Standard or Exp. Proof), Size & Item Numbers must be specifi ed Consult factory for price and availability Figure 25 Horizontal Steam Unit Heaters TO MOTOR TO FAN D-6061 HORIZONTAL STEAM UNIT HEATER PARTS 1 - Element (1) 10 - Fan (1) 21 - Grommet (4) -
Page 22: Troubleshooting Guide
Table 14 - Troubleshooting Guide SYMPTOMS POSSIBLE CAUSE(S) CORRECTIVE ACTION A. Leaking coil. 1. Frozen coil. 1. Replace. 2. Defective coil. 2. Replace. 3. Corrosion. 3. Replace 4. Leak in joint. 4. Braze joint if joint is exposed where leak has occurred. B. -
Page 23: Warranty
HOW TO ORDER REPLACEMENT PARTS Please send the following information to your local representative; If further assistance is needed, contact the manufacturer’s customer service department. • Model number • Serial Number (if any) • Part description and Number as shown in the Replacement Parts Catalog. LIMITED WARRANTY HORIZONTAL STEAM &... -
Page 24: Inspection Sheet
EQUIPMENT START-UP Customer ____________________________________ Job Name & Number _________________________ PRE-INSPECTION INFORMATION With power and water/steam off. Type of Equipment: Unit Heater Serial Number _________________________ Model Number __________________________ Name Plate Voltage: _____________ Name Plate Amperage: _____________ Steam Hot Water Rating: _ _____ BTU @ ____ °F _ _____ kw @ ____ °C ❐...
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