Lochinvar RVU1000 User Manual

Total System Efficiency

System run time is important to overall operating efficiency. To prevent short cycling of the system, it is important to minimize boiler on/off cycling.

Lochinvar Buffer Tanks are a cost effective way to enhance small load effectiveness and increase heating system efficiency. Lochinvar Buffer Tanks are also engineered as the system air separator, further reducing the installed cost of your system, since there is no need for an additional system air separator.

Outstanding Features:

• Increase System Efficiency - Prevent system short cycling for

greater system efficiency and longevity.

• Air Elimination System - Eliminates the need for a separate

system air separator. The unique air collection/elimination system has a built-in air separator with automatic air vent, which reduces system installed cost. The tank’s tangential connections create a swirling action in the center of the unit as water enters and exits, pushing any air held in the system to the center of the tank.

Buffer Tank Air Eliminator

The collection tube at the tank’s center captures that air and

releases it through the air eliminator installed on top of the tank.

• ASME Construction - All models constructed in accordance with

ASME Section VIII, Div. 1 standards and labeled for 125 psi working pressure at 400°F.

• Channel Iron Skid Mounted with Lifting Lugs -

For handling and installation ease.

• Energy Saving Performance - Jacketed tanks meet the efficiency

requirements of the latest ASHRAE Energy Efficiency Standards. The 2” foam insulation provides low standby loss for optimum performance and economy.

• Five Year Limited Warranty - Provides protection against tank

failure resulting from defects in materials or workmanship.

Optional Equipment:

• Temperature & Pressure Gauge

• Handhole

• Manway (300 gallon and larger models)

• Extra Tappings

• Custom Tapping & Flange Sizes

Buffer Tank Quick-Select Chart

1. Locate the desired boiler model number from the column on the left-hand side of the page.

2. Find the “Minimum System Load” range from the three selections at the top of the chart; (0-50,000 Btu/hr) (60,000-100,000 Btu/hr) or (110,000-200,000 Btu/hr).

3. Choose a “System T” based on the minimum temperature drop of the system (20°F/30°F/40°F).

Follow the chosen column down the chart until it crosses the row of your desired boiler. This is the suggested buffer tank necessary to eliminate short-cycling and maintain efficiency.

Example: A CHN0991 boiler installed in a system with a minimum system load of 75,000 Btu/h and a system T of 30°F, will need a RVU200 Buffer Tank.

0 - 50,000 Btu/HR 60,000 - 100,000 Btu/HR 110,000 - 200,000 Btu/HR Model 20°T 30°T 40°T 20°T 30°T 40°T 20°T 30°T 40°T

COPPER-FIN

CBN0745 RVU400 RVU300 RVU200 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 CBN0986 RVU750 RVU400 RVU300 RVU500 RVU400 RVU300 RVU500 RVU300 RVU200 CBN1256 RVU750 RVU400 RVU300 RVU500 RVU400 RVU300 RVU500 RVU300 RVU200 CBN1436 RVU750 RVU400 RVU300 RVU500 RVU400 RVU300 RVU500 RVU300 RVU200 CBN1796 RVU1000 RVU750 RVU500 RVU750 RVU500 RVU400 RVU750 RVU500 RVU400 CBN2066 RVU1000 RVU750 RVU500 RVU750 RVU500 RVU400 RVU750 RVU500 RVU400

COPPER-FIN II

CHN501 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 RVU120 RVU120 – CHN651 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 RVU120 RVU120 – CHN751 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 RVU120 RVU120 – CHN0991 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120 RVU200 RVU120 RVU120 CHN1261 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120 RVU200 RVU120 RVU120 CHN1441 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120 RVU200 RVU120 RVU120 CHN1801 RVU500 RVU300 RVU200 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 CHN2071 RVU500 RVU300 RVU200 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200

POWER-FIN F9 POWER-FIN B9

PBN1002 RVU1000 RVU750 RVU400 RVU1000 RVU750 RVU400 RVU750 RVU500 RVU400 PBN1302 RVU1000 RVU750 RVU750 RVU1000 RVU750 RVU750 RVU1000 RVU750 RVU500

PBN1501 RVU750 RVU500 RVU400 RVU750 RVU500 RVU400 RVU750 RVU500 RVU400 PBN1701 RVU1000 RVU750 RVU500 RVU1000 RVU750 RVU400 RVU750 RVU500 RVU400 PBN2001 RVU1000 RVU750 RVU500 RVU1000 RVU750 RVU500 RVU1000 RVU750 RVU500

F9 2:1 Turndown B9 On/Off

POWER-FIN M9

PBN0752 RVU120 RVU120 RVU120 RVU120 – – – – – PBN1002 RVU200 RVU120 RVU120 RVU120 RVU120 RVU120 RVU120 – – PBN1302 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 RVU120 RVU120 RVU120 PBN1501 RVU300 RVU200 RVU120 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 PBN1701 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120 RVU200 RVU120 RVU120

M9 5:1 Turndown

PBN2001 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120

INTELLI-FIN

IBN1700 RVU400 RVU300 RVU200 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 IBN2000 RVU500 RVU300 RVU300 RVU400 RVU300 RVU200 RVU400 RVU300 RVU200

CBN0495 RVU200 RVU200 RVU120 RVU200 RVU120 RVU120 RVU120 RVU120 – CBN0645 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120

CHN401 RVU200 RVU120 RVU120 RVU120 RVU120 RVU120 RVU120 – –

PBN0502 RVU400 RVU300 RVU200 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 PBN0752 RVU750 RVU400 RVU300 RVU750 RVU400 RVU300 RVU500 RVU400 RVU300

PBN0502 RVU120 RVU120 RVU120 – – – – – –

IBN1500 RVU400 RVU300 RVU200 RVU300 RVU200 RVU200 RVU300 RVU200 RVU120

Note: For applications outside the parameters listed above, please consult the Sizing Formula on the next page or use the “Buffer Tank Sizing Calculator” on our website www.lochinvar.com Click on Accessories, then Buffer Tank/Air Eliminator.

www.Lochinvar.com

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