Crestron electronic 2.5, 3.5, 1.5 service manual Field, Wiring

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38

Figure 7-3 Low Voltage

7 Field

BUILDING MANAGEMENT

SYSTEM

TANK THERMOSTAT

ENABLING

DEVICE

LOUVER

PROVING

SWITCH

LOUVER

RELAY

AUX

SWITCH 1

AUX

SWITCH 2

				B
				A
				SHIELD
		40	SHIELD
		39	B	CASCADE
		38	A	CASCADE
		37	SHIELD
1	ALARM	36	- SYSTEM PUMP
2	CONTACTS	35	+	IN
3	RUN TIME	34	-	BMS
4	CONTACTS	33	+	IN
5	TANK	32		OUTDOOR
6	THERMOSTAT	31		SENSOR
7	ENABLE	30		TANK
8		29		SENSOR
9	LOUVER	28 SYSTEM SUPPLY
10	PROVING	27		SENSOR
11	LOUVER	26 SYSTEM RETURN
12	RELAY	25		SENSOR
13	AUX	24	- BOILER PUMP
14	SWITCH 1	23	+	OUT
15	AUX	22	-	RATE
16	SWITCH 2	21	+	OUT
		20	SHIELD
		19	B	MODBUS
		18	A	MODBUS
		17	SHIELD

SHIELD

A FROM PREVIOUS BOILER

B

B

A TO NEXT BOILER

SHIELD

0-10V INPUT SYSTEM PUMP

OUTDOOR SENSOR

TANK SENSOR

SYSTEM SUPPLY SENSOR

SYSTEM RETURN SENSOR

0-10V OUTPUT BOILER PUMP

B MODBUS

A

SHIELD COMMUNICATION BUS

Field Wiring Connections

wiring

Installation & Operation Manual

Image 38

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 contaminationAreas likely to have contaminants When using an existing vent system to install a new boilerProducts to avoid 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 Optional room air General ventingDirect venting 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 20F 40F 60F Circulator sizingModel Near boiler piping components System Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes Hydronic piping Model Gas Inlet Size Connecting gas supply pipingGas connections Natural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureLine voltage connections Field wiringInstallation must comply with 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 ValveSet clock Verify HWG circulator mode Set HWG target temperatureConfiguration of the cascade 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