Isolar™ Temperature Differential System Controller BX CALEFFI

iSolar™ temperature differential system controller BX CALEFFI

ACCREDITED 01273/13 NA

ISO 9001 FM 21654 ISO 9001 No. 0003

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

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

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

Technical specifications Temperature sensors Platinum RTD type: 1,000 ohm Housing, plastic: PC-ABS and PMMA Collector sensor (black) working range: -58–355ºF (-50–180°C) Protection type: indoor only Tank sensor (gray) working range: 15–175ºF (-10–80°C) Mounting: wall Length of collector sensor cable: 60 in. (1.5 m) Display: extra large LCD with symbols and text Length of tank sensor cable: 95 in. (2.5 m) Interface: seven soft-push control buttons Inputs: 5 Pt1000 temperature sensors Agency Approvals: cTÜVu ™ 2 analog Grundfos Direct Sensors Resistance value (Ω) used to communicate temperature at the RTD 1 V40 impulse flow meter sensor sensor is directly proportional to the temperature at the sensor. Outputs: 3 triac and 1 standard relays Switching relay capacities: °F 14 23 32 41 50 59 68 77 86 - (3) triac: 1A /115V Ω 961 980 1000 1019 1039 1058 1078 1097 1117 - (1) standard: 2A /115V Power supply: 100–240V, 50/60 Hz °F 95 104 113 122 131 140 149 158 167 Data interface: VBus Ω 1136 1155 1175 1194 1213 1323 1252 1271 1290 Performance °F 176 185 194 203 212 221 230 239 248 ΔT adjustment range: 2–40ºFΔ (1–20ºC∆) Ω 1309 1328 1347 1366 1385 1404 1423 1442 1461 Min. temperature differential: 2ºFΔ (1ºC∆) Hysteresis: 2ºFΔ, ± 1ºFΔ (1ºC∆, ± .5ºC∆) Max. tank temperature range: 35–205°F (1–95ºC) Energy metering options Max. collector temperature range: 210–375°F (100–190ºC) 1. Standard temperature sensors, direct flow entry: Emergency shut down of the collector: 230–395°F (110–200ºC) Used for approximate energy metering only. Min. collector temperature range: 50–195ºF (10–90°C) 2. Grundfos Direct Sensors™: Real-time flow, pressure and Antifreeze temperature option: 15–50°F (-10–10ºC) temperature reading for accurate energy metering. kWh (BTU) flow input: 0–26 gpm (0–99 lpm) 3. Rotary pulse flow meter & standard temperature sensors: Alternative method for accurate, real-time energy metering. Dimensions 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.

! Valve ☺ Sensor COL Collector 1 °F 128.6 Sensors Upper store Heating circuit sensor (Heating backup) Collector 2

A D

Store heat Store Store 2 or afterheating/ Code A B C D Wt. (lb.) exchanger solid fuel boiler (with additional symbol) 11 3 11 257270A 6 ⁄16" 7 ⁄4" 7" 1 ⁄16" 3.0 Pumps Additional symbol for the burner operation Valve

Characteristics User-friendly operation Pump speed control functions (some configurations) Large LCD display with 16 Pump speed control can improve system efficiency by reducing the flow sement alphanumeric display, to the collectors on cloudy days, thereby increasing the ∆T between 7 segment numeric display the collector and the tank, which improves solar thermal transfer and and 8 symbols to indicate reduces electrical consumption. system status If the value for the ΔT switch-on is reached (e.g., ΔT on = 9ºF∆), the pump will start with 100% pump speed for 10 seconds, then reduce 7 soft push-button controls the speed to the adjusted minimum pump speed (min. pump speed = SD memory card slot 30%, adjustable). Operating LED control lamp If the temperature difference reaches the set value (e.g., ΔT Set = 18ºF∆), pump speed will increase by 10%. At any further rise of 3ºFΔT the pump Attractive and compact design speed will increase by 10% until the maximum of 100% is reached. Easy to install

Wiring connections at iSolar™ BX temperature differential system controller

T4A 100...240V~

R1-R3 1 (1) A (100...240)V~ R4 2 (1) A (100...240)V~

Temp. Sensor Pt 1000 VFS S1 S2 S3 S4 S5 R4 R3 R2 R1

V40 L' VBus RPS PW M 1 PW M 2 GND N

Abbreviations/Legend: VFS: Grundfos Direct Sensor™ flow/temp sensor V40: V40 rotary pulse flow meter RPS: Grundfos Direct Sensor™ pressure/temp sensor VBus: power S1: sensor 1 (collector 1 sensor) : ground terminal S2: sensor 2 (e.g. tank sensor base) R1-R4: conductors S3: sensor 3 (e.g. tank sensor top) L': conductor not connected with the mains cable S4: sensor 3 (e.g. tank sensor store 2) L: conductor S5: sensor 3 (e.g. collector 2 sensor) N: neutral conductor Standard operation options and functions

General: Multiple tanks: System configuration options — Twenty-six system configuration Second tank loading — The second tank can be turned off (arrangement) options are pre-programmed into the controller. for loading. ΔT control — When the switch-on temperature difference is reached, Priority logic — Used in systems with tank loading in layers only and the pump is activated until the differential temperature reaches or falls determines how the heat is divided between the tanks. below the adjusted switch-off temperature difference. Tank set option — Used in 2-tank systems. When the primary tank Maximum tank temperature — When the maximum tank reaches its set temperature, the secondary tank will be loaded until temperature is exceeded, the pump turns off. Sensor 3 can be it reaches its set temperature. The system will continue to cycle in selected as tank 1 maximum pressure. this fashion. Sensor max. temperature — When the value at the selected sensor Spreaded loading option — Used in 2-tank systems with 2 pumps. reaches the limit temperature, the system will be turned off. When the adjustable spread difference between the collector and the Collector freeze protection — If the temperature falls below the primary tank is reached, the secondary tank will be loaded in parallel adjusted value, the pump is turned on to protect the fluid from freezing. unless it is blocked. If the temperature difference falls by 2°C below the adjustable spread difference, the pump turns off. Overrun — Tank loading continues after the temperature difference between the collector and the tank falls below the switch-off difference, Pause control option — When pause speed is activated, the relay until the ΔT overrun condition is met. of the tank which has been loaded last remains turned on during the loading break time. When pump delay is activated, the corresponding System cooling — If the temperature rises to the maximum adjusted relay for the valve will be energized first. collector temperature, the pump remains on until the temperature falls below the adjusted value. Heat exchange — Transfers heat between tanks, pre-heats return flow, or accomodates solid fuel boiler use. Tank cooling — In the evening, the pump continues running until the storage tank is cooled down. Parallel relay: Return preheating — Heating circuit is pre-heated by the solar circuit energy. Parallel relay — A valve or pump can be controlled in parallel to the pump via a separate relay. Time-controlled thermostatic operation — Works independently from the solar operation for discharging surplus energy or for afterheating. Heat dumping function — Heat dumping works independently from Available in seven pre-programmed configurations (arrangements). the solar operation and activates the second relay. — If the temperature exceeds or Manual operation — For manually adjusting the operating mode of Max./min. temperature limitation the controller during controlling and servicing. falls below the adjusted value, the relay will be turned off. Energy generation measurement kWh (BTU) — The energy Collector: generated in the system is measured by the flow — either directly measured with Grundfos flow meters, the V40 flow meter or manually Collector emergency shutdown — If the maximum collector entered into the controller — and the temperature of the flow and temperature is exceeded, the pump turns off. return sensors. Note: The RPS sensor can be used along with V40 Collector cooling — If the collector temperature increases to for energy measurement. If the VFS is used for flow measurement, the the adjusted maximum value, the solar pump is activated until the RPS sensor must be used as the second temperature sensor. See collector temperature falls below the maximum collector temperature. application diagrams. Minimum collector temperature — The collector circuit is activated Overpressure — If the system pressure , measured by the RPS pressure when the minimum switch-on temperature is exceeded. sensor when installed, exceeds the adjustable maximum value, an error Tube collector — Helps overcome the non-ideal sensor position message will appear and the relay will be blocked. Note: The RPS sensor with some tube collectors. The collector circuit pump turns on for can be used even when the V40 flow meter is connected. an adjustable runtime between adjustable standstill intervals to Low pressure (leakage) — If the system pressure, measured by the compensate for the delayed temperature measurement. RPS pressure sensor when installed, falls below the adjusted value, a warning message is displayed and the system operation is halted until Pumps: the pressure is above the switch-off threshold. Pump speed control — Improves system efficiency by reducing Thermal disinfection — For protecting the upper tank against legionella flow on cloudy days; when the switch-on temperature difference is by actuating booster heating if required with sensor 3 at top of tank. reached, the pump is activated at 100% speed for 10 seconds and Sensor failure alarm — indicates sensor failures with buttons flashing then reduced to the minimum pump speed value. read, hand symbol in display with codes identifying seven failure causes. Pump control — Adjusts the pump control type. Min./max. pump speed — A relative minimum and maximum speed Drainback: for connected pumps can be allocated to the outputs R1, R2 and R3. — A drainback system permits the heat transfer Drainback option Pump exercise — Switches on the relays every day at 12:00 a.m. for fluid to drain back into the holding tank when solar energy is not 10 seconds at 100% to protect the pumps against sticking. collected. Available in 6 pre-programmed system configurations (arrangements). Drainback switch-on condition — Adjusts the time period during which the “∆T 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. Selectable system configuration options The following schematics depict the 26 unique system configuration Choose the system configuration with essentially any combination of the options that are pre-programmed into the iSolar™ BX temperature following system features: differential system controller. These definitions encompass essentially - Standard setup - Afterheating (solid fuel boiler and thermostatic) any system layout that includes a solar thermal collector. - Pump logic - Layered storage tank loading These configurations simplify the setup of the iSolar™ BX temperature - Valve logic - Heating circuit return preheating differential system controller and provide the facility owner the flexibility - Drainback option - Multi-tank heat exchange control to easily reconfigure the system at any time. - East/west collectors

1 2 3

Standard solar system — 1 pump, 2 sensors and Solar system with heat exchange — 2 pumps, Solar system with afterheating — 2 pumps, 1 storage tank 4 sensors and 2 storage tanks 3 sensors and 1 storage tanks

4 5 6

Solar system with storage tank loading in layers — Solar system with valve logic — 1 pump, 3 sensors, Solar system with pump logic — 2 pumps, 3 sensors 1 pump, 3 sensors, 1 3-port valve and 1 storage tank 1 3-port valve and 2 storage tanks and 2 storage tanks

7 8 9

Solar system with East/West collectors — 2 pumps, Solar system with solid fuel boiler afterheating — Solar system with heating circuit return preheating — 3 sensors and 1 storage tank 2 pumps, 4 sensors and 1 storage tank 2 pumps, 4 sensors, 1 3-port valve and 1 storage tank

10 11 12

Solar system with heating circuit return preheating Solar system with storage tank loading in layers Solar system with storage tank loading in layers and and thermostatic afterheating — 3 pumps, and heat exchange control — 2 pumps, 4 sensors, thermostatic afterheating — 2 pumps, 3 sensors, 4 sensors, 1 3-port valve and 1 storage tank 1 3-port valve and 2 storage tanks 1 3-port valve and 1 storage tank 13 14 15

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

16 17 18

Solar system with valve logic and heat exchange Solar system with pump logic and heat exchange Solar system with two collector arrays and heat control — 2 pumps, 4 sensors, 1 3-port valve and control — 3 pumps, 4 sensors and 2 storage tanks exchange control — 3 pumps, 5 sensors and 2 storage tanks 2 storage tanks

19 20 21

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

22 23 24

Solar system with two collector arrays and storage Solar system with two collector arrays and valve Solar system with two collector arrays, storage tank loading in layers — 2 pumps, 4 sensors, logic — 2 pumps, 4 sensors, 1 3-port valve and tank loading in layers and heat exchange control — 1 3-port valve and 1 storage tank 2 storage tanks 3 pumps, 5 sensors, 1 3-port valve and 2 storage tanks

25 26

Solar system with two collector arrays, storage tank Solar system with two collector arrays, storage tank loading in layers and thermostatic afterheating — loading in layers and solid fuel boiler afterheating — 3 pumps, 5 sensors, 1 3-port valve and 1 storage tank 3 pumps, 5 sensors, 1 3-port valve and 1 storage tank Grundfos Direct Sensors™ technology 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 RPS 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 VFS heat energy in the iSolar™ BX controller and displayed as kWh units. This NA150 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. Optional sweat unions The VFS combines the established vortex principle with the direct (not included). 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. Product range Code NA15010 RPS 0–10 two-in-one pressure/temperature sensor 0–150 psi...... 1/2" NPT male Code NA15014 RPS 0–10 two-in-one pressure/temperature sensor 0–150 psi, in-line body...... 1" straight male union thread Code NA15015 VFS 1–12 two-in-one flow/temperature sensor 1/4–3 gpm...... 1" straight male union thread Code NA15016 VFS 2–40 two-in-one flow/temperature sensor 1/2–10 gpm...... 1" straight male union thread Code NA15028 VFS and RPS connecting cable with plug...... 10' length

Technical specifications Dimensions VFS and RPS: RPS A E Connections - pipe: 1" straight male union thread

- electrical: 4 pin connector included, C connecting wire (NA15028) sold separately B C Optional separate fittings: 1/2", 3/4" & 1" sweat tailpieces

(low-lead brass) and brass union nuts E B Materials - body: brass or stainless steel D - seals: EPDM D G - sensor housing: composites (PPS, PA66) A F - tailpieces low-lead brass Code A B C F D E F G Performance 3 7 3 1 1 Suitable fluids: water, glycol solution NA15010 ⁄4" 1 ⁄8" ⁄4" 4.5mm 1 ⁄2" ⁄2" NPT 10.3mm Max. percentage of glycol: 50% Max. working pressure: 150 psi (10 bar) RPS C Max. fluid temperature: 250ºF (120ºC)

Temperature measuring range: 32–210ºF (0–100ºC) E B Temperature measurement accuracy: ±2°F (±1°C) Temperature response time: <1sec. D VFS vortex flow sensor (analog) A Flow measuring range: F - NA15015: 0.25–3 gpm (1–12 lpm) - NA15016: 0.5–10 gpm (2–30 lpm) Code A B C D E F Wt. (lb.) Flow measurement accuracy: 1.5% 1 Flow response time: < 1 sec. NA15014 1" straight 1" 2" 2" ⁄2" 4" 0.6 Power supply: 5 VDC C

RPS relative pressure sensor (analog) C E VFS B Pressure measuring range: 0–150 psi (0–10 bar)

Pressure measurement accuracy: 2.5% full-scale E D B

Pressure response time: < 1 sec. A Power supply: 5 VDC D

A F

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

1 NA15015 1" straight 1" 2" 2" ⁄2" 4" 0.6 C 1 7 1 NA15016 1" straight 1" 2" 2 ⁄4" ⁄8" 4 ⁄2" 0.6

E B D A

F Wiring connections Power supply Electrical Color Wire configuration requirements 1 2 3 4 connector plug 1 1 2 3 4 Wire No. Temperature signal (0.5 to 3.5 V relative to pin 3) • 5 VDC Yellow 2 Pressure (RPS) or flow (VFS) signal Te mperature • Separated from hazardous signal White (0.5 to 3.5 V relative to pin 3) V live circuitry by double or 3 Pressure V reinforced insulation GND (0 V) and ow Pipe system Green signal • Power limitation: 150 VA; 4 Voltage supply (+5 VDC), PELV PE current limitation: 8 A Brown

Operating principle The flow measurement is based on the vortex principle. The molded flow VFS flow sensor cross section — top view 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 Bluff-body Pressure Pressure body. These vortices move down steam giving rise to turbulence pressure vortex generator port detector 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 flow sensor cross section — side view Flow Vortex Pressure direction street port

1 2 3 4 Pressure drop across VFS flow sensors

10.00

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

0.10

RPS sensors utilize Micro-Electro-Mechanical Systems (MEMS) Pressure Dr technology to quickly measure and deliver accurate pressure and Bluff-body Pressure Pressure temperature readingsvor fromtex generator a robust two-in-onepor sensor.t detector NA15015 VFS sensors utilize Micro-Electro-Mechanical Systems (MEMS) NA15016 technology and the principle of vortex shedding using an integrated bluff 0.01 body vortex generator to quickly measure and deliver accurate flow and 0.1110 100 temperature readings from a robust two-in-one sensor. The bluff body Flow rate (gpm) is design to optimize the pulse strength of the pressure variations at the position of the differentialFlow pressureVo sensor.rtex Pressure direction street port

Fitting kits for VFS and RPS sensor inline bodies NA122 NA122 Two union nuts, washers and tail pieces. Two union nuts, washers and tail pieces. Low-lead brass. Low-lead brass.

Code Description Code Description NA12240 1/2" NPT male with 1" union nuts NA12250 3/4" NPT male with 1" union nuts NA12249 1/2" sweat with 1" union nuts NA12259 3/4" sweat with 1" union nuts

NA122 Two union nuts, washers and tail pieces. Low-lead brass.

Code Description NA12260 1" NPT male with 1" union nuts NA12269 1" sweat with 1" union nuts NA797 series V40 rotary pulse flow meters 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 Sweat unions (included). 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 NA79701 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. NA79702 NA79703 Accurate to international standards OIML R75, EN1434 and MID. NA79704 NA79705

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

Technical specifications Dimensions

Materials: Meter body - body and sealing plate: brass B - seals (head to body): EPDM Meter head - housing: brass, stainless steel, composites NA79701 - bearings: hard metal, sapphire, chrome nickel steel D - impeller wheel/head piece: high grade C synthetic material E Performance: Medium: water and glycol A Max. percent of glycol: 50% Working temperature range: -40–210°F (-40–100°C) NA79702 Max. working pressure: 235 psi (16 bar) NA79703 Max. fluid temperature: 265°F (130°C) NA79704 Flow range: NA79705 D - NA79701: 1/4–10 gpm (1–40 lpm) C - NA79702: 1/2–15 gpm (2–50 lpm) E - NA79703: 1/2–25 gpm (2–100 lpm) - NA79704: 1–45 gpm (4–170 lpm) - NA79705: 1-1/2–65 gpm (6–240 lpm) A B Flow accuracy (full scale): ±2% Connections - sweat union: 3/4", 1", 1-1/4", 1-1/2" & 2" Code A B C D E Wt. (lb.)

1 1 1 1 3 NA79701 7 ⁄4" 3 ⁄8" 4 ⁄4" 3 ⁄2" ⁄4"* 3.0

1 15 3 3 NA79702 12 ⁄4" 3 ⁄16" 5 ⁄8" 3 ⁄4" 1" * 5.0

1 1 3 3 1 NA79703 12 ⁄4" 4 ⁄16" 5 ⁄8" 3 ⁄4" 1 ⁄4"* 8.0

1 7 5 1 NA79704 17" 5 ⁄4" 6 ⁄16" 4 ⁄8" 1 ⁄2"* 14.0

15 3 NA79705 18" 5 ⁄16" 7" 4 ⁄4" 2"* 17.0 *Sweat tailpiece Operating principle Pressure drop across V40 rotary pulse flow meter Flow measurement is based on pulses generated in the meter head. ∆P (psi) ∆P (bar) The brass flow pipe directs hydronic fluid to the impeller turbine (1), ∆P (psi) causing it to spin. The flow meter head (2) generates a pulse to turn the 10 10 0.6 0.5 rotary volume indicator disc (3) according to a pre-calibrated volume 0.4 5 5 per pulse. This pulse sends a signal through the communication cable 4 4 0.3 to the iSolar™ BX temperature differential system controller, where this 3 3 0.2 information is used to calculate real-time and cumulative heat energy 2 2 0.1 generation values. NA79701 (3/4") NA79702 (1") NA79703 (1 1/4") 1 1 NA79704 (1 NA797051/2") (2") Enter the value of volume/impulse, in liters, from tag attached to the V40 0.05 0.04 0.5 0.5 rotary meter into the BX controller (FIMP subchannel). 0.4 0.4 0.03 0.3 0.3 0.02 0.2 0.2 3 0.01 0.1 0.1 2 1510 20 50 70 Flow rate (gpm) 0.3 0.5 153 10 20 Flow rate (m3/h)

NA79701 2 3

NA79702 NA79703 NA79704 NA79705

Accessories

NA150 257 Steel electrical mounting box with cover iSolar™ DL2 intelligent web enabled for iSolar™ BX controller. datalogger connects to VBus data terminals on one iSolar™ controller.

Code Description Code Description NA15027 Electrical box 257201A Datalogger

257 NA150 iSolar™ DL3 intelligent web enabled datalogger/BACnet IP gateway Molded cable for connecting Grundfos VFS connects to VBus data terminals on & RPS to BX controller with plug. six iSolar™ controllers.

Code Description Code Description NA15028 VFS & RPS molded cable, 10' 257204A Datalogger with BACnet IP ! ☺ COL 128.6 °F

890 d

0% 100% VBus Sensors

1 23456 CL 123

Optional iSolar™ DL2 or DL3 (pictured) VBus Datalogger

RPS

VFS

Flow

VFS sensor

Return RPS sensor

Application diagrams

! ☺ ! COL ☺ 128.6 °F COL °F 128.6 890 d

0% 100% 890 d VBus Sensors

0% 100% 1 23456 CL 123 VBus Sensors

1 23456 CL 123

Optional iSolar™ Optional iSolar™ DL2 or DL3 (pictured) DL2 or DL3 (pictured) V40 VBus Datalogger VBus Datalogger S2 RPS S1 VFS

Flow Flow temperature VFS sensor sensor Return Return V40 temperature RPS sensor ﬂow meter sensor

specification summaries iSolar™ BX temperature differential system controller PC-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. COL 128.6 °F

Three triac and one standard relay outputs. Three890 d triac 1 Amp 115VAC and one standard 2 Amp 115VAC standard relay capacities. 100–240 VAC,

0% 100% VBus Sensors 50–60 Hz power supply. VBus data connection1 23interface.456 CL 123 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) kWhOptional (BTU) iSolar flow™ in-put. cTÜVus agency approvals. Four 1,000 ohm platinum resistance temperature DL2 or DL3 (pictured) detector (RTD) type V40temperature sensorsVBus included. -58–355ºFDatalogge (-50–180°C)r 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 S2 Grundfos Direct Sensors™ VFS and RPS sensors or V40 rotary pulse flow meter. S1

VFS vortex flow and temperature sensor, code NA15015 and NA15016 Grundfos Direct Sensors™ (analog) VFS vortex flow and temperature sensor for use withiSolar ™ BX temperature differential system controller. Brass or Flow temperature stainless steel in-linesenso body.r Body connections 1 inch straight male union thread. EPDM seals, sensor head to body. Composites (PPS, PA66) sensor head body, silicon‑based MEMS sensingReturn element. Corrosion-resistant coated (EPDM, PPS, PPA 4-GF) wetted internal materials. EPDM sensor-to- V40 temperature housing ﬂowo-ring meter seals. Maximum workingsensor 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 NA15014 Grundfos 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 meters V40 rotary pulse flow meter for use withiSolar ™ 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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