Hastings COUNTERFLO CF SERIES, Инструкция по установке и обслуживанию

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and 3” depending on the Counterflo model and type of gas.
On gas systems, vent pressure regulator(s) and vent valve (if included with unit) to
outside of building. With vent pipe outside, install a proper vent cap and/or screen to
prevent entrance of foreign material and plugging.
2. Fuel Piping – Oil Models
Figure 4 depicts a typical oil piping manifold, while Figures 5 and 6 present typical oil
tank locations. Tanks should be readily accessible for filling from tank cars or trucks,
yet located near the heaters, if practical, to minimize piping problems. National Fire
Protection Association (NFPA), insurance, and local codes and standard should all be
checked carefully prior to installation.
A buried tank is preferred from the aspect of heater maintenance. Tanks installed
above ground subject the oil to variations in temperature and viscosity which may
necessitate frequent burner adjustment.
Underground tanks should be set on a firm foundation and, where necessary, securely
anchored to prevent floating. Attention should also be given to providing adequate
corrosion protection for underground tanks.
All tanks must have minimum 1-1/4” diameter vent pipe extending not more than 1”
into tanks and located at opposite end from fill line. Vents must have weatherproof
hoods and sufficient height to prevent obstruction by snow or ice. Vents for tanks
installed above ground must have flame arrestors.
All piping should be wrought iron, steel or copper with standard fittings not less than
½” iron pipe size. All fittings must be absolutely airtight. All screwed fittings should
be coated with acid-resisting pipe cement. Use swing joints for pipe connections to
buried tanks.
Size of oil line connection is 3/8” on all models. Suction and return lines must be
minimum ½” I.D. Fill lines should be 2” in diameter located at opposite end of tank
from other piping. The suction line should terminate 6” from the bottom of the tank.
If bottom of tank is above the level of the fuel pump, a hand shut-off valve should be
installed at the tank. In all cases, install a hand shut-off valve on the intake side of the
factory furnished strainer. This strainer must be installed ahead of the heater fuel
pump. Do not install a hand shut-off valve in the return line.
Model LO heaters are equipped with either a Sunstrand or Webster pump, factory set at
100# pressure. The pump is designed for a maximum lift of 15’ with a maximum
horizontal run of 100’, equivalent to 15” to 17” of vacuum.
Model HO heaters are equipped with a metering pump only. A separate pump, supplied
by the purchaser, is necessary to supply oil to the metering pump at 3# pressure.
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