Mighty Therm Volume Water Heater | Page 3 |
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SECTION 1.
General Information
1A. Introduction
This manual provides information for the installation and operation of Laars volume water heaters. It is strongly recommended that all application and installation procedures be reviewed completely before proceeding with the installation. Consult the Laars factory, or local factory representative, with any problems or questions regarding this equipment. Experience has shown that most problems are caused by improper installation.
Some accessory items are shipped in separate packages. Verify receipt of all packages listed on the package slip. Inspect everything for possible damage upon delivery, and inform the carrier of any shortages or impairments. Any such claims should be filed with the carrier. The carrier, not the shipper, is responsible for shortages and damage to the shipment whether visible or concealed.
WARNING
All volume water heaters must be installed in accordance with the procedures outlined in this manual. The warranty does not apply to heaters not installed or operated in accordance with these procedures. Consult local building and safety codes before proceeding with work. The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the latest edition of the National Fuel Gas Code; ANS1 Z223.1, National Electrical Code ANSI/ NFPA 70 and/or in Canada
When required by the authority having jurisdiction, the installation must conform to American Society of Mechanical Engineers safety codes for controls and safety devices for automatically fired heaters No.
1B. Heater Identification
Consult rating plate on the heater. The following example simplifies the heater identification.
1 | 2 | 3 | 4 | 5 | 6 |
PW | 1670 | I | N | 09 | C |
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1.Basic heater model.*
2.Input rate X 1000 BTU/hr.
3.Indoor (I) or Outdoor (E) installation.
4.Gas type: Natural (N) or Propane (P).
5.Ignition system: I.I.D. (09) or continuous pilot (16).**
6.Firing rate: On/Off (C),
*Model VW water heaters for use with separate storage tank. There must be a field installed pump to circulate water between the heater and the storage tank.
*Model PW water heaters are basically the same as the VW series except that the PW heaters come with integrally mount pumps.
*Model IW water heaters are tankless instantaneous heaters, complete with mount pump for use in applications having a suitable diversity in heater load.
**Special Options: I.I.D. (04) 115 volts.
Laars commercial water heaters are available in two models: an indoor version and an outdoor version. Both are available from the factory (see Figure 1).
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| 295/8 |
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12¼ | Pump |
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| (752) | C |
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(311) |
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| Gas |
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| Conn. |
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A | V | 58 |
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| Out | In | Rear | ||||
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(1473) |
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| Front |
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| 17¾ |
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| 29 |
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| (197) |
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| (737) | ||||
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| 10¼ |
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| (260) |
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| 17 | 28¼ |
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| (718) |
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| Top |
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| (432) |
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| Side |
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| B |
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Pump |
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(PH Models) |
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| Out In |
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| 61 |
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| (1549) | ||
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| 30¾ |
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| 14 |
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| 7¾ | (356) |
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| (781) |
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19 | Gas |
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| (197) |
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(483) | Inlet |
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| 12 | A |
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| 41¾ |
| 4 |
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| (1060) |
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| (305) |
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| (102) |
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| Front |
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| Side |
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Figure 1. Boiler Configuration.
