Crestron electronic 3.5, 2.5, 1.5 service manual Ratings, Crest Ahri Rating

Page 6

Installation & Operation Manual

Ratings

Crest

AHRI Rating

 

 

 

 

 

 

Net

Model Number

Input

 

 

Gross

AHRI

 

MBH

 

 

Output

Ratings

Note: Change “N” to

 

 

 

 

MBH

Water,

(Note 4)

 

 

 

MBH

“L” for L.P. gas models.

 

 

 

 

 

 

 

 

 

 

 

(Note 1)

(Note 2)

 

Min

 

Max

 

 

 

 

 

 

FB(N,L)1500

60

 

1500

1380

1200

 

 

 

 

 

 

 

FB(N,L)2000

80

 

2000

1840

1600

 

 

 

 

 

 

 

FB(N,L)2500

125

 

2500

2300

2000

 

 

 

 

 

 

 

FB(N,L)3000

150

 

3000

2760

2400

 

 

 

 

 

 

 

FB(N,L)3500

200*

 

3500

3220

2800

 

 

 

 

 

 

 

*For LP models the minimum input is 420 MBH.

 

Other Specifications

 

 

 

 

 

 

 

 

 

Appliance

 

 

 

 

Vent

Weight

Pipe

Pipe

 

Air

Size

w/Water

Water

Size

Size

Gas Inlet

Size

 

(lbs.)

Content

Outlet

Inlet

Size

 

 

 

Gallons

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Note 3)

 

 

 

 

 

 

 

 

96

4"

4"

1 1/2"

7"

7"

2500

 

 

 

 

 

 

 

132

4"

4"

1 1/2"

8"

8"

3055

 

 

 

 

 

 

 

161

4"

4"

2"

8"

9"

3650

 

 

 

 

 

 

 

181

4"

4"

2”

10"

10"

4125

 

 

 

 

 

 

 

215

4"

4"

2”

10"

10"

4750

 

 

 

 

 

 

 

NOTICE Maximum allowed working pressure is located on the rating plate.

Notes:

1.The ratings are based on standard test procedures prescribed by the United States Department of Energy.

2.Net AHRI ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pickup. Ratings are based on a piping and pickup allowance of 1.15.

3.Crest boilers require special gas venting. Use only the vent materials and methods specified in the Crest Installation and Operation Manual.

4.Standard Crest boilers are equipped to operate from sea level to 4,500 feet only with no adjustments.

5.High altitude Crest boilers are equipped to operate from 3,000 to 12,000 feet. High altitude models are manufactured with different control parameters for high altitude operation, but the sequence of operation given in this manual remains the same as the standard boilers. A high altitude label (as shown in FIG A.) is also affixed to the unit.

6.The boiler will de-rate by 4% for each 1,000 feet above sea level up to 4,500 feet and 4.5% for each 1,000 feet above 4,500 feet.

7.Ratings have been confirmed by the Hydronics Section of AHRI.

UNIT EQUIPPED FOR

HIGH ALTITUDE

3,000 FT. TO 12,000 FT.

Figure A High Altitude Label Location

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Contents Save this manual for future reference Contents When servicing boiler Please read before proceedingCrest How it works BlowersCrest How it works Models 1.5 2.0 2.5 3.0 Ratings Crest Ahri RatingBefore locating the boiler, check Installation must comply withDetermine boiler location Provide clearancesVent and air piping Provide air openings to roomFlooring and foundation Prevent combustion air contaminationWhen using an existing vent system to install a new boiler Products to avoidAreas likely to have contaminants When removing a boiler from existing common vent system Remove boiler from wood pallet 7Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room General venting Direct ventingOptional room air Install vent and combustion air piping Air inlet pipe materialsApproved Stainless Steel Vent Manufacturers Make Model Air intake/vent connectionsRemoving from existing vent Common venting Determine location Vertical direct ventingVent/air termination vertical Prepare roof penetrationsMultiple vent/air terminations 4Alternate Vertical Terminations with Multiple BoilersSidewall direct venting Vent/air termination sidewallPrepare wall penetrations 2Clearance to Doors and WindowsRoom air 4Multiple Vent Terminations must also comply with FigureHydronic piping Circulator sizing Model20F 40F 60F Near boiler piping components System Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes Hydronic piping Connecting gas supply piping Gas connectionsModel Gas Inlet Size Natural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Louver proving switch EnableOutdoor temperature sensor Low voltage connectionsWiring of the cascade Auxiliary switch 1Alarm contacts System supply sensorWiring FieldCondensate disposal Condensate drainCheck/control water chemistry Freeze protection when usedStart-up Fill and test water systemInspect condensate system Check for gas leaksCheck thermostat circuits Inspect/check condensate lines and fittingsIf boiler does not start correctly Final checks before starting the boilerStart the boiler Check system and boilerFor Your Safety Read Before Operating Set space heating operation Gas Natural Gas Propane ValveVerify HWG circulator mode Set HWG target temperature Configuration of the cascadeSet clock Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if usedCascade Sequence of operation Crest control module Home Screen2Main Menu Screen Owner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalHandling ceramic fiber materials Cleaning boiler heat exchangerReview with owner Niosh stated First AidDiagrams Integrated Control2Wiring Diagram
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