Slant/Fin Jaguar Model J-390, WATER PIPING 1.Connection of system to boiler, Circulator Pumps

24 Jaguar Model J-390

WATER PIPING

1.Connection of system to boiler:

Primary/secondary piping of the system is recommended, to ensure the proper flow through the boiler. (See Figures 19 through 21). The boiler loop piping must be the same diameter as the water outlet (supply) and inlet (return) piping connections provided on the boiler, particularly on longer loops. See page 2 for piping connection size.

2.Circulator Pumps:

The boiler loop piping must utilize the Taco 1400-20 circulator that is supplied with the boiler, to ensure the proper flow through the boiler. Refer to Figure 18 for the boiler water side pressure drop and Table 2 for the recommended pump models for the domestic hot water system. Install the pumps in the orientation shown in Figures 19 through 21.

3.Relief Valve(supplied with boiler):

Tee the relief valve into the boiler water outlet (supply) piping as close to the water outlet (supply) connection as possible. (See Figure 17). The relief valve’s discharge piping must be the same size or larger than the relief valve’s outlet, and must terminate 6” minimum from floor with a plain (no threads) end. Place a bucket under pressure relief valve discharge. Make sure discharge is always visible. DO NOT hard-pipe to drain piping, or any place where freezing could occur. No shut-off valve is permitted between the relief valve and boiler, or in the discharge line.

4.Air Control System:

An appropriately sized diaphragm-type expansion tank must be used to control the system pressure. See boiler volume data on page 2, and the recommended location in Figures 19 through 21. An air vent is recommended to be installed on an air separator in close proximity to the expansion tank.

5.Cold Water Fill:

A pressure reducing (fill) valve, with a shut-off valve upstream of it, should be installed in close proximity of the expansion tank. (See Figures 19 through 21). Use a back flow check valve in the cold water supply as required by local codes.

6.Low Water Cutoff:

On a hot water boiler installed above radiation level, the boiler must be provided with a low water cutoff device at the time of installation by the installer (see Figure 17 for piping arrangement).

7.Water Treatment and Freeze Protection:

A good water treatment program will not only extend the useful life of this boiler but it will also save much of the time and expense of repairs made necessary by preventable occurrences. A reputable water treatment company should be consulted to evaluate and determine the best overall treatment program for your boiler equipment.

The heat exchanger is made of aluminum, so the system water must be maintained between 7.0 and 8.5 PH level. Thoroughly flush the system, before connecting the boiler, to remove any sediment or glycol.

Anti-freeze is sometimes used in hydronic systems to protect against freeze-up in the event of power failure or boiler shut down in the cold winter. Use RhoGard (Propyleneglycol with Pro-Tek 922 inhibitor) by Rhomar Water Management, Inc. Follow the manufacturer’s instructions for proper application and proper mixture for minimum ambient temperature. Any use of anti-freeze other than that supplied by Slant-Fin or specifically approved and/or recommended for use by Slant-Fin will void this warranty.

Never use Ethylene Glycol as it is toxic to humans.

Never use any types of automotive or standard gylcol freeze protection fluids.

8.Piping a heating - cooling system to a water boiler and chiller:

Figure 21 illustrates a method of piping a heating-cooling system to a water boiler and a chiller. Hand valves (shown) or automatic valves must be installed to prevent circulation of chilled water in the boiler or hot water in the chiller.

The air control system and pressure control system must operate with chiller only, or the boiler only, being valved to the piping system. Separate control devices on the boiler and chiller may be used, or a single set of air and pres- sure controls on the common piping may be preferred.

If the boiler is used to supply hot water to heating coils in air handling units, flow control valves or other devices must be installed to prevent gravity circulation of water in the coils during the cooling cycle.