CALEFFIACCREDITED

ISO 9001 No. 0003ISO 9001 FM 21654

Technical specifications

Housing, plastic: PC-ABS and PMMAProtection type: indoor onlyMounting: wall Display: extra large LCD with symbols and textInterface: seven soft-push control buttonsInputs: 5 Pt1000 temperature sensors 2 analog Grundfos Direct Sensors™

1 V40 impulse flow meter sensorOutputs: 3 triac and 1 standard relaysSwitching relay capacities: - (3) triac: 1A /115V - (1) standard: 2A /115VPower supply: 100–240V, 50/60 HzData interface: VBus

Performance ΔT adjustment range: 2–40ºFΔ (1–20ºCΔ)Min. temperature differential: 2ºFΔ (1ºCΔ)Hysteresis: 2ºFΔ, ± 1ºFΔ (1ºCΔ, ± .5ºCΔ)Max. tank temperature range: 35–205°F (1–95ºC)Max. collector temperature range: 210–375°F (100–190ºC)Emergency shut down of the collector: 230–395°F (110–200ºC)Min. collector temperature range: 50–195ºF (10–90°C)Antifreeze temperature option: 15–50°F (-10–10ºC)kWh (BTU) flow input: 0–26 gpm (0–99 lpm)

Temperature sensorsPlatinum RTD type: 1,000 ohmCollector sensor (black) working range: -58–355ºF (-50–180°C)Tank sensor (gray) working range: 15–175ºF (-10–80°C)Length of collector sensor cable: 60 in. (1.5 m)Length of tank sensor cable: 95 in. (2.5 m)

Agency Approvals: cTÜVu

Resistance value (Ω) used to communicate temperature at the RTD sensor is directly proportional to the temperature at the sensor.

°F 14 23 32 41 50 59 68 77 86

Ω 961 980 1000 1019 1039 1058 1078 1097 1117

°F 95 104 113 122 131 140 149 158 167

Ω 1136 1155 1175 1194 1213 1323 1252 1271 1290

°F 176 185 194 203 212 221 230 239 248

Ω 1309 1328 1347 1366 1385 1404 1423 1442 1461

Energy metering options

1. Standard temperature sensors, direct flow entry: Used for approximate energy metering only.

2. Grundfos Direct Sensors™: Real-time flow, pressure and temperature reading for accurate energy metering.

3. Rotary pulse flow meter & standard temperature sensors: Alternative method for accurate, real-time energy metering.

iSolar™ temperature differential system controllerBX

01273/13 NA

Function

The iSolar™ BX is a multi-functional temperature differential controller with add-on system functions for use in a wide variety of solar thermal heating applications. iSolar™ BX is equipped with four relay outputs; three triac pump speed control relays and one standard relay. The controller is equipped with five Pt1000 sensor inputs, two analog Grundfos Direct Sensors™ inputs, and one impulse flow meter input. Twenty-six system configuration options are predefined for control of a standard solar water heating system, drainback systems, supplemental space heating, multiple storage tanks, heat dump and storage tank booster heating.

Unique Features of this controller include:- Large Liquid Crystal Display (LCD) user interface with seven

control buttons- Easy-to-use icons to operate and customize a solar heating system- Integrated SD memory card slot enabling easy data logging to

SD memory card or convenient transfer of logged system data to PC- Built-in clock and calendar for scheduling- Built-in energy measurement

Product range

Code 257270A iSolar™ BX controller with 3 triac pump speed control relays and 1 standard output relay .............. includes 4 RTD temperature sensors

Tested and Approved by TÜV Rheinland as an approved U.S. Nationally Recognized Testing Laboratory (NRTL). Exceeds or is equivalent to: UL 60730-1A, CAN/CSA E60730-1USC

COL 128.6 °F

!

B C

DA

Temp. SensorPt 1000

S1

S2

S3

S4

S5

PW

M 1

PW

M 2

V40

VB

us

GND

VFS

RPS

R4

R3

R2

R1

L'

L

R1-R3R4

1 (1) A (100...240)V~2 (1) A (100...240)V~

T4A100...240V~

N

Dimensions

Code A B C D Wt. (lb.)

257270A 611⁄16" 73⁄4" 7" 111⁄16" 3.0

Characteristics

User-friendly operation

Large LCD display with 16 sement alphanumeric display, 7 segment numeric display and 8 symbols to indicate system status

7 soft push-button controls

SD memory card slot

Operating LED control lamp

Attractive and compact design

Easy to install

Pump speed control functions (some configurations)Pump speed control can improve system efficiency by reducing the flow to the collectors on cloudy days, thereby increasing the ΔT between the collector and the tank, which improves solar thermal transfer and reduces electrical consumption.

If the value for the ΔT switch-on is reached (e.g., ΔT on = 9ºFΔ), the pump will start with 100% pump speed for 10 seconds, then reduce the speed to the adjusted minimum pump speed (min. pump speed = 30%, adjustable).

If the temperature difference reaches the set value (e.g., ΔT Set = 18ºFΔ), pump speed will increase by 10%. At any further rise of 3ºFΔT the pump speed will increase by 10% until the maximum of 100% is reached.

System screen in the system monitoring display

The LCD display screen will show a graphic similar to the one below. This graphic will vary, depending on the specific system selected.

Sensors

Collector 2

Upper store sensor

Heating circuit (Heating backup)

Sensor

Valve

Collector 1

Store heat exchanger

Store Store 2 or afterheating/solid fuel boiler (with additional symbol)

Valve

PumpsAdditional symbol for the burner operation

Wiring connections at iSolar™ BX temperature differential system controller

Abbreviations/Legend:VFS: Grundfos Direct Sensor™ flow/temp sensorRPS: Grundfos Direct Sensor™ pressure/temp sensorS1: sensor 1 (collector 1 sensor)S2: sensor 2 (e.g. tank sensor base)S3: sensor 3 (e.g. tank sensor top)S4: sensor 3 (e.g. tank sensor store 2)S5: sensor 3 (e.g. collector 2 sensor)

V40: V40 rotary pulse flow meterVBus: power

: ground terminalR1-R4: conductorsL': conductor not connected with the mains cableL: conductorN: neutral conductor

Standard operation options and functions

General:

System configuration options — Twenty-six system configuration (arrangement) options are pre-programmed into the controller.

ΔT control — When the switch-on temperature difference is reached, the pump is activated until the differential temperature reaches or falls below the adjusted switch-off temperature difference.

Maximum tank temperature — When the maximum tank temperature is exceeded, the pump turns off. Sensor 3 can be selected as tank 1 maximum pressure.

Sensor max. temperature — When the value at the selected sensor reaches the limit temperature, the system will be turned off.

Collector freeze protection — If the temperature falls below the adjusted value, the pump is turned on to protect the fluid from freezing.

Overrun — Tank loading continues after the temperature difference between the collector and the tank falls below the switch-off difference, until the ΔT overrun condition is met.

System cooling — If the temperature rises to the maximum adjusted collector temperature, the pump remains on until the temperature falls below the adjusted value.

Tank cooling — In the evening, the pump continues running until the storage tank is cooled down.

Return preheating — Heating circuit is pre-heated by the solar circuit energy.

Time-controlled thermostatic operation — Works independently from the solar operation for discharging surplus energy or for afterheating. Available in seven pre-programmed configurations (arrangements).

Manual operation — For manually adjusting the operating mode of the controller during controlling and servicing.

Energy generation measurement kWh (BTU) — The energy generated in the system is measured by the flow — either directly measured with Grundfos flow meters, the V40 flow meter or manually entered into the controller — and the temperature of the flow and return sensors. Note: The RPS sensor can be used along with V40 for energy measurement. If the VFS is used for flow measurement, the RPS sensor must be used as the second temperature sensor. See application diagrams.

Overpressure — If the system pressure , measured by the RPS pressure sensor when installed, exceeds the adjustable maximum value, an error message will appear and the relay will be blocked. Note: The RPS sensor can be used even when the V40 flow meter is connected.

Low pressure (leakage) — If the system pressure, measured by the RPS pressure sensor when installed, falls below the adjusted value, a warning message is displayed and the system operation is halted until the pressure is above the switch-off threshold.

Thermal disinfection — For protecting the upper tank against legionella by actuating booster heating if required with sensor 3 at top of tank.

Sensor failure alarm — indicates sensor failures with buttons flashing read, hand symbol in display with codes identifying seven failure causes.

Drainback:

Drainback option — A drainback system permits the heat transfer fluid to drain back into the holding tank when solar energy is not collected. Available in 6 pre-programmed system configurations (arrangements).

Drainback switch-on condition — Adjusts the time period during which the “ΔT On” condition must be maintained before solar pump will start.

Drainback filling time — Adjusts the fill time. During this period, the pump runs at 100% speed.

Drainback stabilization — Adjusts the time period during which the switch-off condition will be ignored after the filling time has ended.

Drainback booster function — Turns on a second pump when filling the solar system. When filled, the second pump turns off.

Multiple tanks:

Second tank loading — The second tank can be turned off for loading.

Priority logic — Used in systems with tank loading in layers only and determines how the heat is divided between the tanks.

Tank set option — Used in 2-tank systems. When the primary tank reaches its set temperature, the secondary tank will be loaded until it reaches its set temperature. The system will continue to cycle in this fashion.

Spreaded loading option — Used in 2-tank systems with 2 pumps. When the adjustable spread difference between the collector and the primary tank is reached, the secondary tank will be loaded in parallel unless it is blocked. If the temperature difference falls by 2°C below the adjustable spread difference, the pump turns off.

Pause control option — When pause speed is activated, the relay of the tank which has been loaded last remains turned on during the loading break time. When pump delay is activated, the corresponding relay for the valve will be energized first.

Heat exchange — Transfers heat between tanks, pre-heats return flow, or accomodates solid fuel boiler use.

Parallel relay:

Parallel relay — A valve or pump can be controlled in parallel to the pump via a separate relay.

Heat dumping function — Heat dumping works independently from the solar operation and activates the second relay.

Max./min. temperature limitation — If the temperature exceeds or falls below the adjusted value, the relay will be turned off.

Collector:

Collector emergency shutdown — If the maximum collector temperature is exceeded, the pump turns off.

Collector cooling — If the collector temperature increases to the adjusted maximum value, the solar pump is activated until the collector temperature falls below the maximum collector temperature.

Minimum collector temperature — The collector circuit is activated when the minimum switch-on temperature is exceeded.

Tube collector — Helps overcome the non-ideal sensor position with some tube collectors. The collector circuit pump turns on for an adjustable runtime between adjustable standstill intervals to compensate for the delayed temperature measurement.

Pumps:

Pump speed control — Improves system efficiency by reducing flow on cloudy days; when the switch-on temperature difference is reached, the pump is activated at 100% speed for 10 seconds and then reduced to the minimum pump speed value.

Pump control — Adjusts the pump control type.

Min./max. pump speed — A relative minimum and maximum speed for connected pumps can be allocated to the outputs R1, R2 and R3.

Pump exercise — Switches on the relays every day at 12:00 a.m. for 10 seconds at 100% to protect the pumps against sticking.

Selectable system configuration options

The following schematics depict the 26 unique system configuration options that are pre-programmed into the iSolar™ BX temperature differential system controller. These definitions encompass essentially any system layout that includes a solar thermal collector.

These configurations simplify the setup of the iSolar™ BX temperature differential system controller and provide the facility owner the flexibility to easily reconfigure the system at any time.

Choose the system configuration with essentially any combination of the following system features:

- Standard setup - Afterheating (solid fuel boiler and thermostatic)- Pump logic - Layered storage tank loading- Valve logic - Heating circuit return preheating- Drainback option - Multi-tank heat exchange control- East/west collectors

Standard solar system — 1 pump, 2 sensors and 1 storage tank

1

Solar system with storage tank loading in layers — 1 pump, 3 sensors, 1 3-port valve and 1 storage tank

4

Solar system with East/West collectors — 2 pumps, 3 sensors and 1 storage tank

7

Solar system with heating circuit return preheating and thermostatic afterheating — 3 pumps, 4 sensors, 1 3-port valve and 1 storage tank

10

Solar system with heat exchange — 2 pumps, 4 sensors and 2 storage tanks

2

Solar system with valve logic — 1 pump, 3 sensors, 1 3-port valve and 2 storage tanks

5

Solar system with solid fuel boiler afterheating — 2 pumps, 4 sensors and 1 storage tank

8

Solar system with storage tank loading in layers and heat exchange control — 2 pumps, 4 sensors, 1 3-port valve and 2 storage tanks

11

Solar system with afterheating — 2 pumps, 3 sensors and 1 storage tanks

3

Solar system with pump logic — 2 pumps, 3 sensors and 2 storage tanks

6

Solar system with heating circuit return preheating — 2 pumps, 4 sensors, 1 3-port valve and 1 storage tank

9

Solar system with storage tank loading in layers and thermostatic afterheating — 2 pumps, 3 sensors, 1 3-port valve and 1 storage tank

12

Solar system with storage tank loading in layers and solid fuel boiler afterheating — 2 pumps, 4 sensors, 1 3-port valve and 1 storage tank

13

Solar system with valve logic and heat exchange control — 2 pumps, 4 sensors, 1 3-port valve and 2 storage tanks

16

Solar system with two collector arrays and thermostatic afterheating — 3 pumps, 5 sensors and 1 storage tank

19

Solar system with two collector arrays and storage tank loading in layers — 2 pumps, 4 sensors, 1 3-port valve and 1 storage tank

22

Solar system with two collector arrays, storage tank loading in layers and thermostatic afterheating — 3 pumps, 5 sensors, 1 3-port valve and 1 storage tank

25

Solar system with storage tank loading in layers and return preheating — 2 pumps, 4 sensors, 2 3-port valves and 1 storage tank

14

Solar system with pump logic and heat exchange control — 3 pumps, 4 sensors and 2 storage tanks

17

Solar system with two collector arrays, thermostatic afterheating and return preheating — 4 pumps, 5 sensors, 1 3-port valve and 1 storage tank

20

Solar system with two collector arrays and valve logic — 2 pumps, 4 sensors, 1 3-port valve and 2 storage tanks

23

Solar system with two collector arrays, storage tank loading in layers and solid fuel boiler afterheating — 3 pumps, 5 sensors, 1 3-port valve and 1 storage tank

26

Solar system with storage tank loading in layers and afterheating with heating backup — 3 pumps, 4 sensors, 2 3-port valves and 1 storage tank

15

Solar system with two collector arrays and heat exchange control — 3 pumps, 5 sensors and 2 storage tanks

18

Solar system with two collector arrays and heating circuit return preheating — 3 pumps, 5 sensors, 1 3-port valve and 1 storage tank

21

Solar system with two collector arrays, storage tank loading in layers and heat exchange control — 3 pumps, 5 sensors, 1 3-port valve and 2 storage tanks

24

RPS

NA150VFS

F

C

E

D

A

B

F

C

E

D

A

B

F

C

E

D

A

B

A E

D

B

C

F

G

F

C

E

D

A

B

F

C

E

D

A

B

F

C

E

D

A

B

Optional sweat unions (not included).

Function

NA150 series analog Grundfos Direct Sensors™ consisting of two VFS (Vortex Flow Sensor) and two RPS (Relative Pressure Sensor), are optional components to be used in conjunction with the iSolar™ BX temperature differential system controller to measure heat energy. The VFS measures flow and temperature in the flow stream of the solar system while the RPS measures temperature and pressure in the return stream (refer to the application diagram on page 10). These readings are calculated into heat energy in the iSolar™ BX controller and displayed as kWh units. This information is stored on the iSolar™ BX controller's SD memory card and can be exported and used to analyze and verify real-time and cumulative heat energy generation values from the solar collectors.

The VFS combines the established vortex principle with the direct exposure of the sensor chip to the media which gives superior sensitivity and fast response. The VFS sensor detects the pressure pulsation generated by the vortices and converts the pulsation and temperature into an electrical output signal. The RPS sensor transforms the pressure and temperature of the medium into electrical signals. The pressure signals are linearized to compensate for temperature variations.

The trademark Grundfos Direct Sensors™ is owned and controlled by the Grundfos group.

Grundfos Direct Sensors™ technology

Dimensions

Product rangeCode NA15010 RPS 0–10 two-in-one pressure/temperature sensor 0–150 psi ..................................................................................1/2" NPT maleCode NA15014 RPS 0–10 two-in-one pressure/temperature sensor 0–150 psi, in-line body ........................................ 1" straight male union threadCode NA15015 VFS 1–12 two-in-one flow/temperature sensor 1/4–3 gpm .................................................................. 1" straight male union threadCode NA15016 VFS 2–40 two-in-one flow/temperature sensor 1/2–10 gpm ................................................................ 1" straight male union threadCode NA15028 VFS and RPS connecting cable with plug ......................................................................................................................... 10' length

Technical specifications

VFS and RPS:

Connections - pipe: 1" straight male union thread - electrical: 4 pin connector included,

connecting wire (NA15028) sold separatelyOptional separate fittings: 1/2", 3/4" & 1" sweat tailpieces

(low-lead brass) and brass union nuts

Materials - body: brass or stainless steel - seals: EPDM - sensor housing: composites (PPS, PA66) - tailpieces low-lead brass

PerformanceSuitable fluids: water, glycol solutionMax. percentage of glycol: 50%Max. working pressure: 150 psi (10 bar)Max. fluid temperature: 250ºF (120ºC)Temperature measuring range: 32–210ºF (0–100ºC)Temperature measurement accuracy: ±2°F (±1°C)Temperature response time: <1sec.

VFS vortex flow sensor (analog)Flow measuring range: - NA15015: 0.25–3 gpm (1–12 lpm) - NA15016: 0.5–10 gpm (2–30 lpm)Flow measurement accuracy: 1.5%Flow response time: < 1 sec.Power supply: 5 VDC

RPS relative pressure sensor (analog)Pressure measuring range: 0–150 psi (0–10 bar)Pressure measurement accuracy: 2.5% full-scalePressure response time: < 1 sec.Power supply: 5 VDC

Code A B C D E F Wt. (lb.)

NA15014 1" straight 1" 2" 2" 1⁄2" 4" 0.6

Code A B C D E F G

NA15010 3⁄4" 17⁄8" 3⁄4" 4.5mm 11⁄2" 1⁄2" NPT 10.3mm

Code A B C D E F Wt. (lb.)

NA15015 1" straight 1" 2" 2" 1⁄2" 4" 0.6

NA15016 1" straight 1" 2" 21⁄4" 7⁄8" 41⁄2" 0.6

RPS

RPS

VFS

V

V

4321

PE

Electricalconnector plug

Wire No.

Temperaturesignal

Pressureand owsignal

Pipe system

Power supply requirements

• 5 VDC

• Separated from hazardous live circuitry by double or reinforced insulation

• Power limitation: 150 VA; current limitation: 8 A

0.01

0.10

1.00

10.00

0.1 1 10 100

Pre

ssur

e D

rop

(psi

)

Flow rate (gpm)

NA15015

NA15016

Color Wire configuration1

Yellow Temperature signal (0.5 to 3.5 V relative to pin 3)

2White

Pressure (RPS) or flow (VFS) signal (0.5 to 3.5 V relative to pin 3)

3Green GND (0 V)

4Brown Voltage supply (+5 VDC), PELV

Wiring connections

Pressure drop across VFS flow sensors

Operating principle

The flow measurement is based on the vortex principle. The molded flow pipe (1) directs flow past the wedge shaped vortex generator (2), a series of vortices are generated periodically on each side of the wedge shaped body. These vortices move down steam giving rise to turbulence pressure variations, which are detected directly on silicon bulk micro machined chip (3) in the differential pressure sensor. The frequency of the pressure variations is proportional to the volume flow through the flow pipe (4).

VFS and RPS sensors have been constructed to withstand extended exposure to harsh environments with corrosion resistant coating on the sensor element, no moving parts and a robust brass or composite body.

RPS sensors utilize Micro-Electro-Mechanical Systems (MEMS) technology to quickly measure and deliver accurate pressure and temperature readings from a robust two-in-one sensor.

VFS sensors utilize Micro-Electro-Mechanical Systems (MEMS) technology and the principle of vortex shedding using an integrated bluff body vortex generator to quickly measure and deliver accurate flow and temperature readings from a robust two-in-one sensor. The bluff body is design to optimize the pulse strength of the pressure variations at the position of the differential pressure sensor.

1 2 3 4

Vortexstreet

Flowdirection

Pressureport

Bluff-bodyvortex generator

Pressureport

Pressuredetector

1 2 3 4

Vortexstreet

Flowdirection

Pressureport

Bluff-bodyvortex generator

Pressureport

Pressuredetector

VFS flow sensor cross section — top view

VFS flow sensor cross section — side view

Fitting kits for VFS and RPS sensor inline bodies

Code Description

NA12240 1/2" NPT male with 1" union nuts

NA12249 1/2" sweat with 1" union nuts

Code Description

NA12260 1" NPT male with 1" union nuts

NA12269 1" sweat with 1" union nuts

Code Description

NA12250 3/4" NPT male with 1" union nuts

NA12259 3/4" sweat with 1" union nuts

NA122Two union nuts, washers and tail pieces. Low-lead brass.

NA122Two union nuts, washers and tail pieces. Low-lead brass.

NA122Two union nuts, washers and tail pieces. Low-lead brass.

Sweat unions (included).

NA79701

NA79702NA79703NA79704NA79705

A

B

CD

A B

CD

E

E

NA79701

NA79702NA79703NA79704NA79705

Technical specifications

Materials:

Meter body - body and sealing plate: brass - seals (head to body): EPDM

Meter head - housing: brass, stainless steel, composites - bearings: hard metal, sapphire,

chrome nickel steel - impeller wheel/head piece: high grade

synthetic material

Performance:Medium: water and glycolMax. percent of glycol: 50%Working temperature range: -40–210°F (-40–100°C)Max. working pressure: 235 psi (16 bar)Max. fluid temperature: 265°F (130°C)Flow range: - NA79701: 1/4–10 gpm (1–40 lpm) - NA79702: 1/2–15 gpm (2–50 lpm) - NA79703: 1/2–25 gpm (2–100 lpm) - NA79704: 1–45 gpm (4–170 lpm) - NA79705: 1-1/2–65 gpm (6–240 lpm)Flow accuracy (full scale): ±2%

Connections - sweat union: 3/4", 1", 1-1/4", 1-1/2" & 2"

Function

Series NA797 V40 rotary pulse flow meters are optional components to be used in conjunction with the iSolar™ BX temperature differential system controller to measure heat energy.

The V40 rotary pulse flow meters measure flow in the flow stream of the solar system while standard RTD temperature sensors — included with iSolar™ BX controller — transmit temperature readings at critical points in the system. These flow and temperature readings are calculated into heat energy in the iSolar™ BX controller and displayed as kWh or BTU units. This information is stored on the iSolar™ BX’s SD memory card and can be exported and used to analyze and verify real-time and cumulative heat energy generation values from the solar collectors.

Accurate to international standards OIML R75, EN1434 and MID.

NA797 series V40 rotary pulse flow meters

Product range

Code NA79701 V40 single-jet rotary pulse flow meter 1 pulse = 1 liter* 1/4 – 10 gpm ..............................includes 3/4" union sweat fittingsCode NA79702 V40 multi-jet rotary pulse flow meter 1 pulse = 2.5 liters* 1/2 – 15 gpm ................................. includes 1" union sweat fittingsCode NA79703 V40 multi-jet rotary pulse flow meter 1 pulse = 10 liters* 1/2 – 25 gpm ........................... includes 1-1/4" union sweat fittingsCode NA79704 V40 multi-jet pulse flow meter 1 pulse = 10 liters* 1 – 45 gpm ........................... includes 1-1/2" union sweat fittingsCode NA79705 V40 multi-jet pulse flow meter 1 pulse = 10 liters* 1-1/2 – 65 gpm ................................. includes 2" union sweat fittings

*The pulse rate value input to BX controller (FIMP subchannel) during set up is in liters. Check the tag attached to V40 flow meter to confirm pulse rate.

Dimensions

Code A B C D E Wt. (lb.)

NA79701 71⁄4" 31⁄8" 41⁄4" 31⁄2" 3⁄4" * 3.0

NA79702 121⁄4" 315⁄16" 53⁄8" 33⁄4" 1" * 5.0

NA79703 121⁄4" 41⁄16" 53⁄8" 33⁄4" 11⁄4" * 8.0

NA79704 17" 51⁄4" 67⁄16" 45⁄8" 11⁄2" * 14.0

NA79705 18" 515⁄16" 7" 43⁄4" 2" * 17.0

*Sweat tailpiece

0.1

1

10

0.2

0.3

0.40.5

2

3

45

0.1

1

10

0.2

0.3

0.40.5

2

3

45

0.01

0.1

0.02

0.03

0.040.05

0.2

0.3

0.40.5

0.6

∆P (psi)∆P (psi) ∆P (bar)

Flow rate (gpm)

Flow rate (m3/h)

10

0.3 100.5 1 5

1 5 5020 70

203

NA7

9701

(3/4

")

NA7

9702

(1")

NA7

9703

(1 1

/4")

NA7

9704

(1 1

/2")

NA7

9705

(2")

2

1

3

2

1

3

Operating principle

Flow measurement is based on pulses generated in the meter head. The brass flow pipe directs hydronic fluid to the impeller turbine (1), causing it to spin. The flow meter head (2) generates a pulse to turn the rotary volume indicator disc (3) according to a pre-calibrated volume per pulse. This pulse sends a signal through the communication cable to the iSolar™ BX temperature differential system controller, where this information is used to calculate real-time and cumulative heat energy generation values.

Enter the value of volume/impulse, in liters, from tag attached to the V40 rotary meter into the BX controller (FIMP subchannel).

Pressure drop across V40 rotary pulse flow meter

Code Description

NA15027 Electrical box

Code Description

257201A Datalogger

Code Description

257204A Datalogger with BACnet IP

Code Description

NA15028 VFS & RPS molded cable, 10'

NA150Steel electrical mounting box with cover for iSolar™ BX controller.

257iSolar™ DL2 intelligent web enabled datalogger connects to VBus data terminals on one iSolar™ controller.

257iSolar™ DL3 intelligent web enabled datalogger/BACnet IP gateway connects to VBus data terminals on six iSolar™ controllers.

NA150Molded cable for connecting Grundfos VFS & RPS to BX controller with plug.

Accessories

NA79701

NA79702NA79703NA79704NA79705

We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.

Caleffi North America, Inc. 3883 W. Milwaukee Road Milwaukee, WI 53208 Tel: 414-238-2360 · Fax: 414-238-2366sales@caleffi.com · www.caleffi.us© Copyright 2013 Caleffi North America, Inc.

VFS sensor

VBus

VBusV40

S2

S1

RPS

Flow

Return

VFS

RPS sensor

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

COL 128.6 °F

!

COL 128.6 °F

!

V40flow meter

Returntemperaturesensor

Flow temperaturesensor

VFS sensor

VBus

VBusV40

S2

S1

RPS

Flow

Return

VFS

RPS sensor

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

1

0%

890 d

VBus

100%

2 3 4 5 6

Sensors

CL 1 2 3

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

Optional iSolar™DL2 or DL3 (pictured)

Datalogger

COL 128.6 °F

!

COL 128.6 °F

!

V40flow meter

Returntemperaturesensor

Flow temperaturesensor

iSolar™ BX temperature differential system controllerPC-ABS and PMMA housing plastic. Protection type is Indoor only. Wall mounting. Display is extra large LCD with symbols and text. Seven soft push button interface. Five temperature sensor inputs. Two analog Grundfos Direct Sensors™ inputs. One V40 impulse flow meter sensor imput. Three triac and one standard relay outputs. Three triac 1 Amp 115VAC and one standard 2 Amp 115VAC standard relay capacities. 100–240 VAC, 50–60 Hz power supply. VBus data connection interface. 2–40ºFΔ (1–20ºCΔ) ΔT adjustment range. 2ºFΔ (1ºCΔ) minimum temperature differential. 2ºFΔ, ±1ºFΔ (1ºCΔ, ±.5ºC) hysteresis. 35–205°F (1–95ºC) maximum tank temperature range. 210–375°F (100–190ºC) maximum collector temperature range. 230–395°F (110–200ºC) emergency shut down of the collector. 50–195ºF (10–90°C) minimum collector temperature range. 15–50°F (-10–10ºC) antifreeze temperature option. 0–26 gpm (0–99 lpm) kWh (BTU) flow in-put. cTÜVus agency approvals. Four 1,000 ohm platinum resistance temperature detector (RTD) type temperature sensors included. -58–355ºF (-50–180°C) collector sensor working range. 15–175ºF (-10–80°C) tank sensor working range. Collector sensor cable length of 60 in. (1.5 m). Tank sensor cable length of 95 in. (2.5 m). For heat energy measurement, provide with analog Grundfos Direct Sensors™ VFS and RPS sensors or V40 rotary pulse flow meter.

VFS vortex flow and temperature sensor, code NA15015 and NA15016Grundfos Direct Sensors™ (analog) VFS vortex flow and temperature sensor for use with iSolar™ BX temperature differential system controller. Brass or stainless steel in-line body. Body connections 1 inch straight male union thread. EPDM seals, sensor head to body. Composites (PPS, PA66) sensor head body, silicon-based MEMS sensing element. Corrosion-resistant coated (EPDM, PPS, PPA 4-GF) wetted internal materials. EPDM sensor-to-housing o-ring seals. Maximum working pressure 150 psi (10 bar). Maximum fluid temperature 250°F (120°C). Temperature measuring range 32 to 210°F (0 to 100°C); temperature measurement accuracy ±2°F (±1°C). Temperature response time <1 second. Flow measuring range: 0.25 to 3 gpm (1 to 12 lpm); 0.5 to 10 gpm (2 to 30 lpm). Flow measurement accuracy, full-scale ±1.5%. Flow response time <1 second. Suitable fluids water and 50% maximum glycol solution. Provide with code NA122 series filling kits with brass union nuts, gaskets and low-lead brass sweat or NPT male tailpiece end connections, and code NA15028 ten foot molded connecting wire with plug.

RPS relative pressure and temperature sensor, code NA15010 and NA15014Grundfos Direct Sensors™ (analog) RPS relative pressure sensor for use with iSolar™ BX temperature differential system controller. Stainless steel body. Body connections 1/2 inch NPT male union thread (NA15010) and 1 inch straight male union thread (NA15014). EPDM seals. Composites (PPS, PA66) sensor head body, silicon-based MEMS sensing element. Corrosion-resistant coated (EPDM, PPS, PPA 4-GF) wetted internal materials. EPDM sensor-to-housing o-ring seals. Maximum working pressure 150 psi (10 bar). Maximum fluid temperature 250°F (120°C). Temperature measuring range 32 to 210°F (0 to 100°C); temperature measurement accuracy ±2°F (±1°C). Temperature response time <1 second. Pressure measuring range 0 to 150 psi (0 to 10 bar); pressure measurement accuracy, full-scale ±2.5%. Pressure response time <1 second. Suitable fluids water and 50% maximum glycol solution. Provide with code NA15028 ten foot connecting wire with plug. For inline body model, NA15014, provide with code NA122 series fitting kits with brass union nuts, gaskets and low-lead brass sweat or NPT male tailpiece end connections.

V40 rotary pulse flow metersV40 rotary pulse flow meter for use with iSolar™ BX temperature differential system controller. Body and sealing plate brass, head to body seals EPDM, meter head housing brass, stainless steel, composites, bearings hard metal, sapphire, chrome nickel steel, impeller wheel/head piece high grade synthetic material. Suitable fluids: water or 50% maximum glycol solution. Working temperature range -40 to 210°F (-40 to 100°C), max. fluid temperature 265°F (130°C). Maximum working pressure 235 psi (16 bar). Flow accuracy (full scale): ±2%. Accurate to International Standards OIML R75, EN1434 and MID. For code NA79701 single-jet, flow measuring rate 1/4 to 10 gpm (1–40 lpm), connections 3/4" union sweat. For code NA79702 multi-jet, flow measuring rate 1/2 to 15 gpm (2–50 lpm), connections 1" union sweat. For code NA79703 multi-jet, flow measuring rate 1/2 to 25 gpm (2–100 lpm), connections 1-1/4" union sweat. For code NA79704 multi-jet, flow measuring rate 1 to 45 gpm (4–170 lpm), connections 1-1/2" union sweat. For code NA79705 multi-jet, flow measuring rate 1-1/2 to 65 gpm (6–240 lpm), connections 2" union sweat.

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Application diagrams