Laars FT Series Скачать руководство пользователя | Manualshive

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Page 21

Cascading the FT Series ‘Heating Only’ Boiler

NOTE: DHW is a boiler dedicated load. The DHW sensor or

aquastat must be connected to the Boiler dedicated

to Domestic Hot water.

Cascade System - System Application & DHW Tank

Follower

Leader

CLOSELY SPACED TEES

MAKE UP WATER

Indirect DHW Tank

DHW SYSTEM PUMP

DHW TEMP

SENSOR

SPACE HEATING

ZONE CIRCUIT

ZONE CIRCULATORS

PURGING VALVES

COLD WATER

CASCADE

SYSTEM

SENSOR

Figure 21.

Two FT wall-mounted heating only models, cascaded and with DHW Tank.

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Содержание FT Series

Страница 1: ...ious injury property damage or death Improper installation and or operation will void the warranty AVERTISSEMENT Assurez vous de bien suivres les instructions donn es dans cette notice pour r duire au...

Страница 2: ...g and Wiring Diagrams 8 2 A Cascade FT Floor Heating Only Boilers Piping and Wiring Diagrams 8 2 B Cascade FT Wall Mounted Heating Only Boilers Piping 18 SECTION 3 Cascade Communications the cascade c...

Страница 3: ...design delta T Non adherence to these sizing guidelines may result in premature boiler failure and resulting problems are NOT covered by product warranty CAUTION Use both thread tape and pipe dope to...

Страница 4: ...tional CH Supply CH Return Combustion Air Vent GAS INPUT V3 V1 The floor standing models have a built in low loss header The boiler circulation pump circulates the CH water in the boilers contained lo...

Страница 5: ...s header The boiler circulation pump circulates the CH water out the common header up to 15 of equivalent pipe at 1 5 diameter pipe Max Amp draw per pump 1 6 Amps 1 C 2 Wall Mounted CH Circulation 1 D...

Страница 6: ...uge Wire TACO LTR STD Wire Harness Hydrolevel harness Green White Red Yellow Yellow TACO LTR0243T 1 Low Water Cut Off Hydrolevel SAFGARD Model 1100 Low Water Cut Off Thermostat or Endswitch 18 Gauge W...

Страница 7: ...W TEMP SENSOR DHW PUMP N G L N G SYSTEM PUMP Outdoor Sensor 18 Gauge Wire L N G MAIN POWER L ZC L T T PUMP N G L ZC L T T CASCADE SYSTEM SENSOR Line Voltage Terminals Low Voltage Terminals POWER TO 24...

Страница 8: ...st the internal LLH valves V 1 V 2 V 3 to their proper positions PRIOR to boiler installation WARNING This drawing shows suggested piping configuration and valving Check with local codes and ordinance...

Страница 9: ...ONE 1 1 2 3 4 1 ZONE 4 PRIORITY 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 THERMOSTAT 3 4 ZONE 4 JUMPER 3 4 2 WIRE ZONE VALVE NO END SWITCH 3 WIRE ZONE VALVE POWER OPEN 4 WIRE ZONE VALVE SELF CLOSING 1 2 3 MOTOR...

Страница 10: ...ECTION 3 on page 22 for cascade kit details WARNING This drawing shows suggested piping configuration and valving Check with local codes and ordinances for additional requirements See Section 1 C on p...

Страница 11: ...CARDS RESET NORMAL SR 504 EXP T STATS ZONE 1 ZONE 3 POWER ZONE 1 ZONE 2 ZR Wiring Diagram for Cascaded Reverse Return with Zone Pumps Floor Model Boiler 1 Lead Floor Model Boiler 2 Follow P3 P2 P1 Ou...

Страница 12: ...ON 3 on page 22 for cascade kit details WARNING This drawing shows suggested piping configuration and valving Check with local codes and ordinances for additional requirements See Section 1 C on page...

Страница 13: ...P N G L ZC L T T CASCADE SYSTEM SENSOR INPUT 120 VOLT CIRCULATORS X X END SWITCH ZC 120V RELAY FUSE 1 AMP SLAVE MASTER 1234 ZONE 4 PRIORITY ON OFF POWER ZONE 2 ZONE 3 FOUR ZONE SWITCHING RELAY WITH OP...

Страница 14: ...or common pipe sizes for system and return supply headers for different system Delta T s See SECTION 3 on page 22 for cascade kit details WARNING This drawing shows suggested piping configuration and...

Страница 15: ...minals Line Voltage Terminals Low Voltage Terminals Low Voltage Terminals DHW PUMP N G L N G SYSTEM PUMP L N G MAIN POWER 14 Gauge Wire 14 Gauge Wire L Z C L T T PUMP N G L ZC L T T CASCADE SYSTEM SEN...

Страница 16: ...ge 4 for reference to adjust the internal LLH valves V 1 V 2 V 3 to their proper positions PRIOR to boiler installation WARNING This drawing shows suggested piping configuration and valving Check with...

Страница 17: ...or Cascaded Reverse Return with Zone Pumps and Indirect P4 DHW Aquastat Stage 1 18 Gauge Wire P3 P2 P1 Line Voltage Terminals Low Voltage Terminals R 0 10V W INPUT LWC O S T T AC24V OUTPUT DHW TEMPERA...

Страница 18: ...responsible for all equipment and detailing required by local codes NOTE The cascading communications cable is 60 long This must be considered during installation as this leaves only about 12 between...

Страница 19: ...ding communications cable is 60 long This must be considered during installation as this leaves only about 12 between adjascent units Leader Follower CASCADE SYSTEM SENSOR SUPPLY RETURN RETURN SUPPLY...

Страница 20: ...long This must be considered during installation as this leaves only about 12 between adjascent units Cascade FT Wall Mounted Heating Only Boilers Piping Diagrams continued Mixing Valve Zone Valve Ac...

Страница 21: ...r dedicated to Domestic Hot water Cascade System System Application DHW Tank Follower Leader CLOSELY SPACED TEES MAKE UP WATER Indirect DHW Tank DHW SYSTEM PUMP DHW TEMP SENSOR SPACE HEATING ZONE CIRC...

Страница 22: ...Installation and Operation Instructions for details Make sure that power is disconnected OFF at boiler before continuing with these instructions The FT heating only boilers can be controlled by only...

Страница 23: ...n end Leader Control Board Leader Control Board Follower Control Board Follower Control Board Last Female Connector Plug the included Ending Resistor into it Last Female Connector Plug the included En...

Страница 24: ...e is 60 long Routing for the FT Floor models can be via the side floor plastic knock outs provided Place boilers within 16 from each other Routing for the wall mounted units can be via the bottom or b...

Страница 25: ...for DHW Ensure the DHW circulator is wired to the DHW Pump contacts on a boiler that is piped to the indirect water heater If there is an active call for Heat and a simultaneous call for DHW the boile...

Страница 26: ...Display Power was Off Installer Mode C Heating Water CH set point change mode Maxium 82 C 180 F D Time Date Set No Change To SET Year Month Week Day Time Min E Scroll Select Menu select or value up d...

Страница 27: ...cation DHW Demand Demand Call indication Info Installer mode Information Installer mode indication Communication state Communication state indication Time setting mode Time Display Install mode indica...

Страница 28: ...f Before connecting the cascading cables to the boiler there are 2 items that need to be programmed on all units Start with the Lead Unit and then Repeat on all Following Units make sure to power down...

Страница 29: ...4 Cascade mode operates via system sensor Units shut off when system sensor reaches system target temperature 5 Each boiler s built in circulator operates anytime the boiler fires 6 If a system pump...

Страница 30: ...is 30 minutes and can be adjusted from 0 to 60 minutes using parameter 24 dP see parameter table below Using an Aquastat When using a DHW aquastat the aquastat monitors the temperature of the indirec...

Страница 31: ...roblem persists replace the main control NOTE During the error state the units will continue to operate Boiler setpoint will be the same as the system sensor setpoint until the issue is remedied Durin...

Страница 32: ...NOTE This error will only appear in a cascaded system 1 Turn power OFF and ON at the boiler display panel 2 If error reappears ensure all cascaded boilers are powered ON 3 If error reappears check Ins...

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