Field wiring, Line voltage connections | Crestron electronic 3.5, 2

7 Field wiring

Installation & Operation Manual

WARNING

NOTICE

CAUTION

ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death.

Wiring must be N.E.C. Class 1.

If original wiring as supplied with boiler must be replaced, use only type 105°C wire or equivalent.

Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – latest edition.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

Installation must comply with:

1.National Electrical Code and any other national, state, provincial, or local codes, or regulations.

2.In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local codes.

Line voltage connections

1.Connect 120 VAC power wiring to the line voltage terminal strip in the junction box, as shown in FIG. 7-1.

2.Provide and install a fused disconnect or service switch sized per the boiler amp draw (shown on the boiler rating plate) as required by the code (see FIG. 7-1).

3.When connecting the boiler, system and hot water generator pumps connect the wiring to the line voltage terminal strip as shown in FIG. 7-1. Maximum current is 1.5 amps. Install a field supplied contactor between the pump(s) and the boiler connections.

4.For alternate voltages, consult factory.

Figure 7-1 Boiler Line Voltage Field Wiring Connections

NEUTRAL W

GROUND G

LINE BK

SYSTEM PUMP DRY CONTACT

BOILER PUMP DRY CONTACT

HWG PUMP DRY CONTACT

SERVICE SWITCH			120V SUPPLY
NL			120V SUPPLY
BE INSTALLED	FIELD SUPPLIED CONTACTOR MUST	SYSTEM PUMP BOILER PUMP HWG PUMP	MAX. 1.5 AMPS PER CONNECTION
CONTACTOR
(FIELD SUPPLIED)

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Image 35

Crestron electronic 3.5, 2.5, 1.5 service manual Field wiring, Installation must comply with, Line voltage connections

Contents

Save this manual for future reference Contents Please read before proceeding When servicing boiler Blowers Crest How it works Crest How it works Models 1.5 2.0 2.5 3.0 Crest Ahri Rating Ratings Provide clearances Installation must comply withDetermine boiler location Before locating the boiler, check Prevent combustion air contamination Provide air openings to roomFlooring and foundation Vent and air piping Areas 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 Air inlet pipe materials Install vent and combustion air piping Air intake/vent connections Approved Stainless Steel Vent Manufacturers Make Model Removing from existing vent Common venting Prepare roof penetrations Vertical direct ventingVent/air termination vertical Determine location 4Alternate Vertical Terminations with Multiple Boilers Multiple vent/air terminations Vent/air termination sidewall Sidewall direct venting 2Clearance to Doors and Windows Prepare wall penetrations 4Multiple Vent Terminations must also comply with Figure Room air Hydronic 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 Propane Gas Natural gas Check inlet gas supply GAS Piping Size Chart Gas Pressure Gas valve replacement Line voltage connections Field wiringInstallation must comply with Low voltage connections EnableOutdoor temperature sensor Louver proving switch System supply sensor Auxiliary switch 1Alarm contacts Wiring of the cascade Field Wiring Condensate drain Condensate disposal Fill and test water system Freeze protection when usedStart-up Check/control water chemistry Inspect/check condensate lines and fittings Check for gas leaksCheck thermostat circuits Inspect condensate system Check system and boiler Final checks before starting the boilerStart the boiler If boiler does not start correctly For Your Safety Read Before Operating Gas Natural Gas Propane Valve Set space heating operation Set clock Verify HWG circulator mode Set HWG target temperatureConfiguration of the cascade General Operating information Protection features Outdoor reset operation, if used Boiler temperature regulation Cascade Sequence of operation Home Screen Crest control module 2Main Menu Screen See the Crest User’s Information Manual for Instructions Maintenance Maintenance and annual startupService technician Owner maintenance Maintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tank Check flame signal Check ignition ground wiringCheck all boiler wiring Check control settings Niosh stated First Aid Cleaning boiler heat exchangerReview with owner Handling ceramic fiber materials Integrated Control Diagrams 2Wiring Diagram