background image

Cascade Instructions 

Document 1349C

H2384200C

 WARNING

If the information in this manual is not 

followed exactly, a fire or explosion may 

result causing property damage, personal 

injury or loss of life.

Do not store or use gasoline or other 

flammable vapors and liquids in the vicinity of 

this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

•  Do not try to light any appliance.

•  Do not touch any electrical switch; do not 

use any phone in your building.

•  Immediately call your gas supplier from a 

nearby phone. Follow the gas supplier's 

instructions.

•  If you cannot reach your gas supplier, call 

the fire department.

Installation and service must be performed 

by a qualified installer, service agency, or gas 

supplier.

FOR YOUR SAFETY:

 This product must be installed and serviced by a professional service technician, 

qualified in hot water boiler and heater installation and maintenance. Improper installation and/or operation 

could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or 

death. Improper installation and/or operation will void the warranty.

 AVERTISSEMENT

Assurez-vous de bien suivres les instructions 

données dans cette notice pour réduire au 

minimum le risque d’incendie ou d’explosion 

ou pour éviter tout dommage matériel, toute 

blessure ou la mort.

Ne pas entreposer ni utiliser d’essence ou ni 

d’autres vapeurs ou liquides inflammables dans 

le à proximité de cet appareil ou de tout autre 

appareil.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE 

GAZ:

•  Ne pas tenter d’allumer d’appareils.

•  Ne touchez à aucun interrupteur. Ne pas vous servir 

des téléphones dans le bâtiment où vous vous 

trovez.

•  Appelez immédiatement votre fournisseur de 

gaz depuis un voisin. Suivez les instructions 

du fournisseur.

•  Si vous ne pouvez rejoindre le fournisseur de 

gaz, appelez le sservice des incendies.

L’installation et l’entretien doivent être assurés par 

un installateur ou un service d’entretien qualifié 

ou par le fournisseur de gaz.

Cascading the

 

Floor Standing and Wall-Mounted  
Modulating Condensing Gas  
Heating Only Boilers

FT 

SERIES

Floor Models: B/LFTHF199
Wall-Mounted Models: B/MFTHW 100, 140, 199

•  

Natural Gas (NG)   

Factory Configuration

•  

Propane Gas (LP) 

 

Field-Convertible

Summary of Contents for FT Series

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Reviews: