background image

 

 SECTION  2: INSTALLATION  

 

   

 

 2.12  Combustion Air 

Air supply is a direct requirement of ANSI 223.1, NFPA-54, and local codes. These codes should be 
consulted before a permanent design is determined.  

The combustion air must be free of chlorine, halogenated hydrocarbons, and other chemicals that can 
become hazardous when used in gas-fired equipment. Common sources of these compounds are 
swimming pools, degreasing compounds, plastic processing, and refrigerants. Whenever the environment 
contains these types of chemicals, combustion air MUST be supplied from a clean area outdoors for the 
protection and longevity of the equipment and warranty validation. 

If combustion air is not supplied through air ducts, it must be supplied to the unit(s) through two 
permanent openings. These two openings must have a free area of 

not less than one square inch (6.5 

cm

2

) for each 4000 BTUs (1.17 kW) input

 for 

each unit

. The free area must take into account restrictions 

such as louvers and bird screens.  

2.12.1  Ducted Combustion Air 

For ducted combustion air installations, the air ductwork must be attached directly to the air inlet 
connection on the sheet metal enclosure. Consult the 

CFR Venting and Combustion Air Guide

, TAG-0105 

when designing combustion air ducting.   

When using the unit in a ducted combustion air configuration, the minimum diameter connection at the 
unit is 

8-inches

 

 2.13  CFR Pump Relay  

The CFR power panel includes a pump relay terminal block providing 120VAC with a maximum pilot duty 
of 3 amps. If the pump power requirement under all conditions is greater than 3 amps, use this relay to 
activate the pump through an intermediate relay with a higher power. 

 

Figure 2-16: Pump Relay Terminal Block (in Red Rectangle) 

The Pump Delay Timer feature allows pump to run for up to 30 minutes after the boiler has shut down 
and the demand is satisfied. To enable, go to 

Advanced Setup 

 Ancillary Devices 

 Relays

 and set the 

Pump Off Delay 

setting to the desired delays time

 

Summary of Contents for AERCO CFR 3000

Page 1: ...OMM 0163_A...

Page 2: ...stallation Instructions 11 2 8 GAS SUPPLY PIPING 12 2 8 1 Gas Supply Specifications 12 2 8 2 External Gas Supply Regulator 12 2 8 3 Massachusetts Installations 13 2 8 4 Manual Gas Shutoff Valve 13 2 9...

Page 3: ...f the boiler is a function of the unit s firing rate valve position and return water temperature When installed and operated in accordance with these instructions theCFR3000complies withtheBay Area Ai...

Page 4: ...jury Fluidsunderpressuremaycauseinjurytopersonnelordamagetoequipmentwhenreleased Besureto shutoffallincomingandoutgoingwatershutoffvalves Carefullydecreasealltrappedpressurestozero before performing m...

Page 5: ...cy shutdown switch or circuit breaker will immediately shut off the fuel For boilers monitored and or operated from a continuously occupied control room provide an emergency shutdown switch in the con...

Page 6: ...er unpacking make a close inspection of the unit to ensure that there is no evidence of damage not indicated by the Tip N Tell indicator The freight carrier should be notified immediately if any damag...

Page 7: ...vice maintenance requirements must also be taken into consideration All piping must include ample provisions for expansion NOTE CFR units can be installed with zero side clearances in pairs only See A...

Page 8: ...d separately away from the pad as shown below The minimum pad thickness without a Condensate Neutralizer tank is 4 inches 10 2 cm 1 If using an AERCO CondensateNeutralizerTank P N89030 youmustensureen...

Page 9: ...eeping concrete pad required in the desired location Figure 2 4 Lifting Lug Locations 2 5 Supply And Return Piping When connecting the hot water outlet and cold water inlet to building piping make sur...

Page 10: ...sthave provisionsforsuitablecondensatedrainageorcollection Thecondensatedrain port located on the exhaust manifold must be connected to the condensatetrap P N24789 Itsinletand outlet connections conta...

Page 11: ...ondensatepiping DoNOTusecarbon copper PVC orpolypropylene If a floor drain is not available a condensate pump can be used to remove the condensate to an appropriate drain The maximum condensate flow r...

Page 12: ...piping must be performed using a soap and water solution or suitable equivalent The gas piping used must meet all applicable codes 2 8 1 Gas Supply Specifications CFR Low NOx series boilers require st...

Page 13: ...ions External AC powerconnections aremadetotheunit insidethePowerBoxonthefrontoftheunit Remove the front panel to access the Power Box which is mounted in the upper part of the unit Figure 2 9 Power B...

Page 14: ...at it does not interfere with the removal of any unit covers inhibit service maintenance or prevent access between the unit and walls or another unit 2 10 Field Control Wiring I O Board Each unit is f...

Page 15: ...nager units Required for the OUTDOOR RESET mode of operation To enable this mode go to the Controller s Main Menu Advanced Setup Unit Application Configuration and set SH Operating Mode to Outdoor Res...

Page 16: ...6 Sensor Ground Ground connection for RTD Spare 1 7 NOT USED 8 NOT USED 9 NOT USED 10 DHW Temp Connect the DHW tank temperature or DHW Loop Supply Temperature sensor 11 Shield Connection to the shiel...

Page 17: ...O Connection to a DHW Pump enable disable signal 4 DHW Pump Relay Com 5 V2 Spare 1 Relay N O Connection to an auxiliary device enable disable signal such as System Pump Pump 2 Louver Louver 2 Damper...

Page 18: ...r 1 Go to Advanced Setup Unit Unit Settings Find the Vent Type parameter 2 Set this parameter to match your vent material Category I this sets the exhaust temp limits Horizontal vent runs slope upward...

Page 19: ...To ensure the proper pressure range is maintained the CFR boiler requires a barometric damper to be installed immediately after the factory supplied starter piece see Figure 2 15 Do not use the applia...

Page 20: ...17kW inputforeachunit Thefreeareamusttakeintoaccountrestrictions such as louvers and bird screens 2 12 1 Ducted Combustion Air For ducted combustion air installations the air ductwork must be attache...

Page 21: ...seDelayappearsonlyifUnitMode inMainMenu AdvancedSetup BSTCascade Cascade Configuration equals BST Manager Once the system load is satisfied and all Client units have stopped firing the BST Manager ope...

Page 22: ...elayed interlock 1241 Black 3 Remove and dispose of the cap with jumper wire attached 4 Plug the Molex connector into the sequencing isolation valve s connector 5 When the Sequencing Isolation Valve i...

Page 23: ...APPENDIX A DIMENSIONAL AND CLEARANCE DRAWINGS APPENDIX A DIMENSIONAL AND CLEARANCE DRAWINGS CFR 3000 Dimension Drawing AP A 1093 rev A...

Page 24: ...APPENDIX A DIMENSIONAL AND CLEARANCE DRAWINGS CFR 3000 Zero Side Clearance Drawing SD A 1283 rev A...

Page 25: ...AERCO International Inc 2023...

Reviews: