Pumped Blend

Page 11

GV100W BOILER

INSTALLATION & OPERATING INSTRUCTIONS

An additional circulator can also be used to provide a return water temperature blend. This method works well with systems with multiple zones with circulators, see FIG. NO. 8. The dedicated bypass circulator provides a strong blending flow without diminishing the flow available to any heating zone. Any residentially sized circulator is adequate for this purpose.

Each of these bypass solutions also has the added benefit of increasing circulation in the boiler which will maximize tankless coil output and increase the accuracy of temperature sensing controls.

FIG NO. 9

REVERSE

AQUASTAT

SET AT 120° F

115 volts

reverse

aquastat

N.O.

circulator

24 volts

t'stat

operating aquastat

N.C.

	FIG. NO. 8
	SUPPLY	RETURN
	100%	100%
	100%	120° F
	160° F	120° F
	160° F
		100%
		160° F
	200%	200%
	160° F	140° F
	PUMPED
	BYPASS

Piping For Use With Cooling Units

The boiler, when used in connection with a refrigeration system must be installed so the chilled medium is piped in parallel with the boiler. Appropriate valves must be used to prevent the chilled water from entering the boiler. See FIG. NO. 10 for the proper piping layout.

When a boiler is connected to a heating coil that may be exposed to refrigerated air from an air handling device, the piping system must be equipped with flow-control valves or some other automatic means of preventing gravity circulation of the boiler water during the cooling cycle.

FIG. NO. 10 Chiller Schematic

Reverse Acting Aquastats

An alternative for existing systems experiencing condensation that does not require re-piping the boiler utilizes a reverse acting aquastat, one that makes on temperature rise. This approach

NOTE

FOR HEATING: VALVES "H" OPEN, VALVES "C" CLOSED.

FOR COOLING: VALVES "H" CLOSED, VALVES "C" OPEN.

works best in single zone systems. Wired in series with the circulator, this control holds the circulator off until the boiler reaches an acceptable temperature and then starts system circulation, see FIG. NO. 9.

The most commonly available reverse acting aquastat is a Honeywell L4006B. The aquastat should be mounted in an immersion well directly installed in the boiler. The use of heat conductive grease (Honeywell part # 972545) in the immersion well is strongly recommended for fast and accurate temperature response. Set this adjustable aquastat to make at no less than 130° F, 54° C. While this method can cause the circulator to cycle more frequently, setting the aquastat’s differential to the maximum (25-30°F) will minimize short cycling.

EXP. TANK

RELIEF

VALVE

FILL

VALVE

DRAIN

BOILER

ROOM

UNIT

VENT

		H
	PUMP	C
	PUMP	DRAIN
		DRAIN

H C

CHILLER

GVIOM-5R specifications

The Smith Cast Iron Boilers GVIOM-5R is a high-efficiency, versatile heating solution designed for both residential and commercial applications. This model is particularly renowned for its robust construction, impressive performance, and energy-saving features. With a focus on durability, the GVIOM-5R is built from high-quality cast iron, which not only ensures longevity but also excellent thermal mass for effective heat retention.

One of the main features of the GVIOM-5R is its fire-tube design, which enhances heat transfer and allows for higher efficiency rates compared to traditional boiler designs. The fire-tube configuration ensures that flue gases travel through a series of tubes submerged in water, maximizing heat exchange and minimizing heat loss. This design contributes to an efficiency rating that often exceeds 85%, helping users to reduce their energy costs while maintaining comfort.

The boiler is equipped with advanced control technology, allowing for precise temperature management. This feature is critical for optimizing performance and ensuring consistent heating throughout the property. Additionally, an integrated diagnostic system enables users to monitor boiler operations and troubleshoot potential issues before they escalate, ensuring reliable performance and reducing downtime.

Another characteristic that sets the GVIOM-5R apart is its flexibility in fuel options. The boiler can operate on various fuels, including natural gas, propane, or oil, making it an adaptable choice for different heating needs. This multi-fuel capability not only provides versatility but also allows property owners to choose the most economical and efficient fuel source based on their specific circumstances.

Maintenance is also simplified with the GVIOM-5R, thanks to its accessible design that allows for easy servicing and parts replacement. The robust construction minimizes the need for frequent repairs, which enhances overall reliability and customer satisfaction.

In summary, the Smith Cast Iron Boilers GVIOM-5R combines durability, efficiency, and versatility. Its innovative fire-tube design, advanced control systems, multi-fuel capabilities, and ease of maintenance make it an outstanding choice for those seeking a reliable heating solution. Whether for a home or a commercial building, the GVIOM-5R stands out as a top-tier option that delivers consistent performance and long-term value.