04/19/23 1Variable Speed LowdownVariable Speed Lowdown

TYPICAL EUROPEAN SYSTEM

TRV’s, No T-stats

Pump runs 24/7 (6k hrs)

TRV’s modulate

TYPICAL US SYSTEM

Series loop, fin-tube baseboard CI bb/radiators/convectors Radiant floor heating

Mutliple zones, circs or ZV’s

Approx 2,100 – 2,500 hrs of operation

WHY USE A VARIABLE SPEED CIRCULATOR? Good question…

Best applications… Zone valve or RFH Zone pump?

Electrical savings?

5 007’s @ 80W each = 400 Watts

400 Watts ÷ 1000 = 0.4 kW

ELECTRICAL SAVINGS????

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5 007’s @ 80W each = 400 Watts

400 Watts ÷ 1000 = 0.4 kW

0.4 kW × 2,500 “on” hrs = 1,000 kWh

1,000 kWh × 15¢/kWh = $150.00/yr

ELECTRICAL SAVINGS????

1 007 (80W) + 5 Zone Sentry zone valve (1.44W each)= 87.2 Watts

87.2 Watts ÷ 1000 = 0.0872 kW

0.0872 kW × 2,500 “on” hrs = 218 kWh

218 kWh × 15¢/kWh = $32.25/yr

WITH ZONE VALVES…

1 Pump (20W) + 5 Zone Sentries (1.44W each)= 27.2 Watts

27.2 Watts ÷ 1000 = 0.0272 kW

0.0272 kW × 2,500 “on” hrs = 68 kWh

68 kWh × 15¢/kWh = $10.20/yr

WITH SUPER DUPER ECM…

5 ZONE SYSTEM

70,000 BTUH

7 GPM @ 5’ head

Where does systemreally work?

• GPM = BTUH

• T = BTUH

• T = 70,000

• < 14.50

T × 500

GPM 500

9.5 500

NUMBERS DON’T LIE…

1 ZONE CALLING

10,000 BTUH

1 GPM @ 5’ head

Where does itreally work?

• GPM = BTUH

• T = BTUH

• T = 10,000

• 100

T × 500

GPM 500

2 500

NUMBERS STILL DON’T LIE…

The Result?

And And when it’swhen it’s353500 out? out?

And And when it’swhen it’s353500 out? out?

SO WHAT SO WHAT ABOUT THE ABOUT THE

VR 1816?VR 1816?

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SO, SO, PROGRAMMING PROGRAMMING

THE VR THE VR 1816????1816????

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KEEP IT SIMPLE…

CP Settings – zone pump: 85’ total length = CP I (5’ hd) 165’ total length = CP II (10’ hd) 250’ total length = CP III (15’ hd)

Based on ML × 1.5 × .04

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STEPLESS/INFINITE ADJUST

Min = 003 Low = 006 Med = 007/0015 Low High = 008/0015 Med Max = 0015 Hi Or for guys who actually

calculate flow & head…

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