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VISM-9

J30-05403

INSTALLATION INSTRUCTIONS & PARTS LIST

VERTICAL STEAM AND HOT WATER UNIT HEATERS

Model No.

Serial No.

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.

INSTALLER’S RESPONSIBILITY

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.

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.

RECEIVING INSTRUCTIONS

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.

04/13

260 NORTH ELM ST., WESTFIELD, MA 01085

TEL: (413) 568-9571 FAX: (413) 562-8437

www.mestek.com

Summary of content (28 pages)

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VISM-9 INSTALLATION INSTRUCTIONS & PARTS LIST VERTICAL 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. Serial No.
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TABLE OF CONTENTS GENERAL SAFETY INFORMATION .......................... 3 SPECIFICATIONS Dimensional Data .................................................. 4 Mounting Specifications ................3, 4, 7, 15-18, 27 Steam Performance Data ................................... 5, 6 Steam Calculations & Correction Factors ............... 7 Hot Water Performance Data ............................8-11 Hot Water Calculations & Correction Factors ...... 12 Technical Data ...........................................
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GENERAL SAFETY INFORMATION Failure to comply with the general safety information may result in extensive property damage, severe personal injury or death. Do not insert fingers or foreign objects into the heater or its air moving device. Do not block or tamper with the heater in any manner while in operation or just after it has been turned off, as some parts may be hot enough to cause injury.
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DIMENSIONAL DATA Figure 3 - Models 40-77 Figure 4 - Models 104-700 K H H K H K H V G A A U R R G V R R G A R A (4) MOUNTING HOLES THREAD TAPS 3/8 - (4) MOUNTING HOLES 3/8 - 16 FOR MODELS 104-367 THREAD TAPS 1/2 - 13 FOR MODELS 495-700 16 FOR MODELS 40-77 CEILING CEILING P L F T STEAM SUPPLY OR HOT WATER RETURN P L F B STEAM RETURN OR HOT WATER SUPPLY K V T STEAM SUPPLY OR HOT WATER RETURN B S S C T C E STEAM RETURN OR HOT WATER SUPPLY T E P P D D Table 1 – Fig
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STEAM PERFORMANCE DATA** Table 3 - Standard Units Unit Capacity (MBH) 040 062 077 104 125 144 164 200 237 285 317 367 495 585 700 Output BTU/HR (kW) Condensate lbs/hr (kg/hr) Sq. ft. (Sq. m) 41,300 (12.1) 33,600 (9.8) 65,500 (19.2) 52,800 (15.5) 80,600 (23.6) 65,100 (19.1) 101,800 (29.8) 87,900 (25.8) 124,400 (36.4) 152,000 (44.5) 173,000 (50.7) 210,200 (61.6) 249,800 (73.2) 283,800 (83.2) 333,400 (97.7) 386,000 (113.1) 496,000 (145.3) 585,000 (171.4) 705,000 (206.6) 43 (19.5) 55 (24.9) 68 (30.
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STEAM PERFORMANCE DATA** Table 4 - “Low Output” Standard Vertical Units with All Air Ports Open Unit Capacity (MBH) Output BTU/HR (kW) Condensate lbs/hr (kg/hr) 040L 34,800 (10.2) 26,000 (7.6) 36 (16.3) 27 (12.2) 59 (26.7) 48 (21.7) 71 (32.2) 57 (25.8) 89 (40.3) 74 (33.5) 115 (52.1) 130 (58.9) 154 (69.8) 183 (82.9) 224 (101.5) 260 (117.8) 302 (136.8) 356 (161.3) 446 (202.0) 533 (241.4) 642 (290.8) 062L 077L 104L 125L 144L 164L 200L 237L 285L 317L 367L 495L 585L 700L 57,200 (16.8) 45,800 (13.
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STEAM CALCULATIONS AND CORRECTION FACTORS EXAMPLE: – UNIT SIZE __________ 40 Steam Pressure ___10 PSI Entering Air Temp. __ 40°F I. CAPACITY A. For 2 lbs. steam, 60°F entering air Read output directly from Table 3: 41,300 BTU/HR. B. For higher steam pressures and/or EAT’s above or below 60°F Multiply output from Table 3 by appropriate correction factor from Table 5 (below). II. FINAL AIR TEMPERATURE A. For 2 lbs. steam, 60°F entering air 41,300 x 1.27 = 52,451 BTU/HR.
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HOT WATER PERFORMANCE DATA** Table 7 - Standard Output Units Unit Capacity (MBH) 040 040* 062 062* 077 077* 104 104* 125 Water Temp Drop °F (°C) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) Output MBH (kW) 28.8 (8.4) 22.7 (6.7) 16.
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HOT WATER PERFORMANCE DATA** Table 7 - Standard Output Units Unit Capacity (MBH) 144 164 200 237 285 317 367 495 585 700 Water Temp Drop °F (°C) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 15° (8.3°) 20° (11.1°) 30° (16.7°) 15° (8.3°) 20° (11.1°) 30° (16.7°) 15° (8.3°) 20° (11.1°) 30° (16.7°) 15° (8.3°) 20° (11.1°) 30° (16.7°) 20° (11.1°) 30° (16.7°) 15° (8.3°) 20° (11.1°) 30° (16.7°) 20° (11.1°) 30° (16.7°) Output MBH (kW) 117.6 (34.
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HOT WATER PERFORMANCE DATA** Table 8 - Low Output Units Standard Vertical Unit with All Air Ports Open Unit Capacity (MBH) 040L 040L* 062L 062L* 077L 077L* 104L 104L* 125 Water Temp Drop °F (°C) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.
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HOT WATER PERFORMANCE DATA** Table 8 - Low Output Units Standard Vertical Unit with All Air Ports Open Unit Capacity (MBH) 144L 164L 200L 237L 285L 317L 367L 495L 585L 700L Water Temp Drop °F (°C) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.7°) 20° (11.1°) 30° (16.7°) 10° (5.6°) 20° (11.1°) 30° (16.
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HOT WATER CALCULATIONS AND CORRECTION FACTOR EXAMPLE: – UNIT SIZE _______________________ 40 Entering Water Temp. ____________ 160°F Entering Air Temp. _______________ 40°F Water Temperature Drop __________ 10°F I. CAPACITY @ 20°F TD: A. For 200°F EWT, 60°F EAT Read output directly from Tables 7 & 8, 22,700 BTU/HR (Ref., Std. 40, p. 8). B. For EWT and/or EAT above or below Standard Multiply output from Tables 7 & 8 by factor from Table 9 (below). 22,700 x .878 = 19,931 BTU/HR. II.
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TECHNICAL DATA The performance data listed in Tables 3, 4, 7 and 8 include sound ratings. The ratings provide a guide in determining the acceptable degree of loudness in particular occupancy situations. Certain general rules apply to specific selection of unit heaters with regard to degree of quietness (or loudness); • The greater the fan diameter, the higher the sound level. • The higher the motor RPM, the higher the sound level.
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MOTOR DATA NOTE 1: All motors are constant speed and operate at top speed as indicated in motor data. Models through 1/8 H.P. can be run at reduced speed with addition of optional variable speed switch. This switch is factory-calibrated for low and high speed ratings, with intermediate speeds infinitely controllable. Models 164 through 700 operate at constant speed as indicated in motor data. NOTE 2: Stated draw is Full Load (FLA). AMP draw varies by motor manufacturer ± .2 AMPS.
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INSTALLATION It is assumed that the design engineer has selected, sized, and located in the area to be heated by the design engineer. However, the information given here may be of additional help to the installer. Vertical unit heaters should be located to give spot heating or a circulatory distribution, preferably near the outer perimeter of the building. The units should be spaced to properly blanket the areas with warm air. Place the units at points of greatest heat loss.
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Table 16 - Maximum Mounting Height in Feet with and without Louver Cone Diffuser Unit Size 40 40* 40L 40L* 62 62* 62L 62L* 77 77* 2 (13.8) 10.5 (3.2) 12.5 (3.8) 7.5 (2.3) 9.0 (2.7) 12.5 (3.8) 14.5 (4.4) 9.0 (2.7) 10.5 (3.2) 12.0 (3.7) 14.5 (4.4) 9.5 (2.9) 11.5 (3.5) 15.0 (4.6) 19.0 (5.8) 11.5 (3.5) 14.0 (4.3) 15.0 (4.6) 18.5 (5.6) 11.0 (3.4) 13.5 (4.1) Steam Pressure (PSI) 5 10 50 75 (34.5) (68.9) (344.7) (517.1) 10.0 10.0 9.0 8.0 (3.0) (3.0) (2.7) (2.4) 12.0 12.0 11.0 10.0 (3.7) (3.7) (3.4) (3.
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Table 16 - Maximum Mounting Height in Feet with and without Louver Cone Diffuser Unit Size 164 164L 200 200L 237 237L 285 285L 317 2 (13.8) 18.0 (5.5) 22.5 (6.9) 22.0 (6.7) 27.5 (8.4) 22.0 (6.7) 27.5 (8.4) 25.5 (7.8) 31.5 (9.6) 20.0 (6.1) 25.0 (7.6) 24.0 (7.3) 29.5 (9.0) 21.0 (6.4) 26.0 (7.9) 25.5 (7.8) 32.0 (9.8) 24.0 (7.3) 30.0 (9.1) Steam Pressure (PSI) 5 10 75 50 (34.5) (68.9) (344.7) (517.1) 14.0 17.0 14.5 17.5 (4.3) (4.4) (5.2) (5.3) 18.0 21.5 19.0 22.0 (5.5) (5.8) (6.6) (6.7) 17.5 18.5 21.
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Table 17 - Maximum Spread Unit Size Spread ft (m) 40 15 (4.6) 62 17 (5.2) 77 20 (6.1) 104 24 (7.3) 125 26 (7.9) 144 27 (8.2) 164 28 (8.5) 200 32 (9.8) 237 35 (10.7) 285 37 (11.3) 317 45 (13.7) 367 50 (15.2) 495 54 (16.5) 585 57 (17.4) 700 60 (18.3) Note: The “spread” is the diameter of the comfort zone at floor level. The above table represents the spread for standard units without a louver cone diffuser and mounted at its maximum height at 2 PSI (13.
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Dirt pockets should be the same pipe size as the return tapping of the unit heater. Also, pipe size in the branchoff should be the same size as the tapping in the traps. Beyond the trap, the return lateral pipe should be increased one size up to the return main. PIPING To provide proper coil operation, follow all piping recommendations listed in this manual. Threaded pipe headers are provided on all Vertical Units for piping connections. See Figure 5.
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ELECTRICAL CONNECTIONS THERMOSTAT WIRING AND LOCATION HAZARDOUS VOLTAGE! disconnect ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death. NOTICE: The thermostat must be mounted on a vertical vibration-free surface free from air currents and in accordance with the furnished instructions. Mount the thermostat approximately 5 feet (1.
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Figure 10 - Fan Motor Connections Low Voltage with Protector Select Rotation (CCW shown) (Marathon) Figure 11 - Fan Motor Connections Low Voltage CCW Internal (Marathon) Figure 13 - Fan Motor Connections 3 Phase Wiring 21 Figure 12 - Fan Motor Connections 115/1/60 Constant Speed, Two Lead (GE, Marathon, Universal)
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WIRING INSTALLATION Figure 14 - MANUAL CONTROL WITH Figure 15 - THERMOSTATIC CONTROL SINGLE PHASE MOTOR WITH MANUAL STARTER WITH REVERSE ACTING CONTROLLER AND MANUAL STARTER 1 PHASE LINE 1 PHASE LINE 1 PHASE LINE Figure 16 - THERMOSTATIC CONTROL MANUAL STARTING SWITCH MANUAL STARTING SWITCH MANUAL STARTING SWITCH MOTOR MOTOR MOTOR LIMIT CONTROLLER REVERSE ACTING ROOM THERMOSTAT Figure 17 - THERMOSTATIC CONTROL Figure 18 - THREE POSITION SELECTOR Figure 19 - THREE POSITION SELECTOR USING MAGN
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OPTIONS VARIABLE SPEED CONTROL 115 Volt Only (optional) The Solid State speed controller may be installed at any convenient location and is suitable for surface or flush type mounting. A standard electrical single or double gang wall box is recommended as in Figure 25.
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MAINTENANCE O Open all disconnect switches and secure in that position before servicing unit. Failure to do so may result in personal injury or death from electrical shock. FAN AND MOTOR ASSEMBLY For cleaning or maintenance purposes, the fan and motor assembly may be removed easily from the Unit Heater. The motor is attached to the fan guard which is, in turn, mounted to the top or back panel of the unit as shown in Figure 27.
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Table 20 - Troubleshooting Guide POSSIBLE CAUSE(S) SYMPTOMS Frozen coil. Defective coil. Corrosion. Leak in joint. CORRECTIVE ACTION A. Leaking coil. 1. 2. 3. 4. B. Poor output on steam. 1. Check for air in coil. 2. Lint on coil fins. 1. Repair or replace thermostatic air vent. 2. Clean coil and fins. Check filter and clean. C. Poor output on steam or hot water. 1. No circulation of water through coil. 1. Check circulation pump. Check for blocked tubes. 2. Check voltage and correct.
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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.
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OSHA Fan Guard/Louver Cone Diffuser Installation Detail NOTICE: To meet ETL and OSHA requirements, units mounted below 8 feet (2.4m) must be equipped with an OSHA fan guard. Vertical unit heaters can support either an OSHA fan guard or the Louvered Cone Diffuser - both items cannot be installed on the same unit. The figures below show how both the OSHA Fan Guard and the Louver Cone Diffuser are installed on the Vertical Steam and Hot Water Unit Heater.
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EQUIPMENT START-UP Customer ____________________________________ Job Name & Number _________________________ PRE-INSPECTION INFORMATION With power and water/steam off.