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Crestron electronic NOTICE, Figure 5-5 Multiple Boilers - Alternate - Common Header - Fixed or Variable Flow Primary

Models: 1.5 2 2.5 3 3.5

1 60

Download 60 pages, 5.56 Mb

Installation & Operation Manual

5 Hydronic piping

Please note that these illustrations are meant to show system piping concept only, the installer is responsible

for all equipment and detailing required by local codes.

NOTICE

Y-STRAINER

(RECOMMENDED)

(TYPICAL)

RELIEF

VALVE

(TYPICAL)

BALL VALVE

(TYPICAL)

AIR SEPERATOR

DRAIN PORT

(TYPICAL)

SYSTEM

CIRCULATOR

BACK FLOW

PREVENTER

PRESSURE

REDUCING VALVE

PRESSURE

GAUGE

EXPANSION

TANK

FROM SYSTEM

TO SYSTEM

MAKE UP

WATER

BOILER DRAIN

(TYPICAL)

SYSTEM RETURN

SENSOR

SYSTEM SUPPLY

SENSOR

Figure 5-5 Multiple Boilers - Alternate - Common Header - Fixed or Variable Flow Primary

When installing multiple Crest boilers in fixed or variable flow primary applications, utilize a reverse-return

or other piping method to ensure balanced flow through each boiler.

NOTICE

Contents

Main Contents Hazard definitions DANGER WARNING CAUTION CAUTION NOTICE Please read before proceeding When servicing boiler Boiler operation Boiler water The Crest - How it works... Left Side (inside unit) Right Side (inside unit) The Crest - How it works... 5 Front View Models 1.5 - 2.0 - 2.5 - 3.0 - 3.5 7 36 6 35 9 Ratings Crest AHRI Rating Other Specifications UNIT EQUIPPED FOR HIGH ALTITUDE Installation must comply with: Before locating the boiler, check: Provide clearances: Provide air openings to room: Flooring and foundation Prevent combustion air contamination When using an existing vent system to install a new boiler: When removing a boiler from existing common vent system: Remove boiler from wood pallet Combustion and ventilation air requirements for appliances drawing air from the equipment room Page Page 2 Install vent and combustion air piping Air inlet pipe materials: Air intake/vent connections Approved Stainless Steel Vent Manufacturers Make Model Removing from existing vent 2 Common venting Flue Damper Kits Model Damper Size Kit Number 3 Vent/air termination vertical Prepare roof penetrations Termination and fittings Determine location 3 Multiple vent/air terminations 4 Sidewall direct Vent/air termination sidewall Determine location Termination and fittings Multiple vent/air terminations 4 Vent/air termination sidewall Prepare wall penetrations 4 Room air System water piping methods Low water cutoff device Chilled water system Freeze protection General piping information CREST Pressure Drop Curve Circulator sizing Near boiler piping components NOTICE Figure 5-2 Single Boiler - Recommended - Primary / Secondary Piping with a Hot Water Generator NOTICE Model Number of Units 234567 8 Recommended Common Header Pipe Sizes in Inches Figure 5-4 Single Boiler - Alternate - Fixed or Variable Flow Primary System Piping NOTICE NOTICE Figure 5-5 Multiple Boilers - Alternate - Common Header - Fixed or Variable Flow Primary Connecting gas supply piping Propane Gas: Natural gas: 6 TABLE - 6B Check inlet gas supply Gas Pressure Gas valve replacement Installation must comply with: Line voltage connections GROUND G NEUTRAL W LINE BK SYSTEM PUMP BOILER PUMP Low voltage connections Enable Outdoor temperature sensor Variable speed system pump ModBus 7 Auxiliary switch 1 & 2 System supply sensor Boiler management system Runtime contacts Figure 7-3 Low Voltage Field Wiring Connections 8 Condensate drain Check/control water chemistry Freeze protection (when used) Fill and test water system Purge air from water system Check for gas leaks Check thermostat circuit(s) Inspect condensate system Final checks before starting the boiler Start the boiler If boiler does not start correctly Check system and boiler Check flame and combustion FOR YOUR SAFETY READ BEFORE OPERATING Figure 9-2 Operating Instructions OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE Check flame and combustion Set space heating operation Set Hot Water Generator (HWG) operation General How the boiler operates How the control modules operate Control inputs and outputs Temperature control Protection features Boiler temperature regulation Outdoor reset operation, if used Cascade Sequence of operation Crest control module Page Maintenance and annual startup Service technician Owner maintenance Address reported problems Inspect boiler area Check all piping for leaks Inspect boiler interior Clean condensate trap 11 Flue vent system and air piping Check water system Check expansion tank Check boiler relief valve Inspect ignition and flame sense electrodes Check ignition ground wiring Check all boiler wiring Check control settings Perform start-up and checks 11 Cleaning boiler heat exchanger Handling ceramic fiber materials REMOVAL OF COMBUSTION CHAMBER LINING NIOSH stated First Aid. 12 Figure 12-1 Ladder Diagram 12 Figure 12-2 Wiring Diagram HIGH VOLTAGE SMALL CONNECTION BOARD INTEGRATED CONTROL