Table of Contents
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Table of Contents
Related Manuals for Williams AV
Summarization of Contents
Product Safety and Receiving
Important Safety Information
General advice on using common sense and caution when installing and operating the equipment.
Safety Symbols and Labels
Explains the meaning of warning and caution symbols used throughout the manual.
Receiving Unit Inspection
Instructions for inspecting units upon delivery for shipping damage and verifying the correct model.
Installation and Piping Practices
Unit Installation Procedures
Details on checking the unit, ensuring blower access, and conforming to NFPA Standard 90B.
Unit Protection During Construction
Emphasizes protecting the unit from vandalism, weather, and construction debris.
Handling and Installation Weight
Advises that units weigh 110-290 lbs and require a minimum of two people for handling.
Normal Piping Practices
Guidelines for supporting piping, insulating lines, and ensuring proper condensate drainage.
Winter Installation Precautions
Warns about freezing temperatures for units filled with water during winter installation.
Start-Up and Fan Coil Piping
Start-Up Procedures
Covers pressure testing, wiring requirements, and belt-drive unit adjustments.
Fan Coil Piping Instructions
Explains piping arrangements for chilled and hot water coils.
Two-Pipe Coil Configurations
Details arrangements for two-pipe coils, including single inlets/outlets and circuit variations.
Four-Pipe Coil Configurations
Describes four-pipe coils with separate chilled and hot water coils and common tube sheets.
Piping Details and Model Identification
Hose Kit Installation and Care
Provides guidance on installing flex hoses, checking sealing surfaces, and proper union tightening.
Model Number Coil Identification
Explains how model numbers indicate the number and type of chilled and hot water coils.
WILLIAMS ONDemand™ Instructions
ONDemand Systems Overview
Defines ONDemand systems as one-pipe primary loops with decoupled terminal unit circuits.
Decoupled System Definition
Explains decoupling as separating effects of flows in two piping loops for independent control.
ONDemand Piping Installation and Purging
Provides best practices for installing and purging ONDemand piping networks.
ONDemand Circulator and Twin Tee Details
ONDemand Circulator Orientation
Details proper orientation of circulator motor shaft and junction box to prevent air binding.
Circulator Air Binding Prevention
Advises installing circulators upstream of purge valves to prevent air trapping.
Twin Tee Location and Orientation
Advises piping Twin Tees in the primary loop and orienting branch connections on the side.
Purging and Cleaning Loops
Purging and Cleaning Primary Loops
Details initial loop purging, cleaning debris, and using city water pressure.
Operating Pump for Loop Cleaning
Describes running the primary pump until screens show no debris and water is clean.
Purging ONDemand Secondary Loops
Mentions a similar process for purging ONDemand secondary loops after primary loop cleaning.
Purging ONDemand Loops with City Water
Details using city water pressure to purge ONDemand loops with primary pumps off.
Purging ONDemand Supply and Return Sides
Instructs on purging the supply side and then the return side of ONDemand loops.
Maintenance and Repair Introduction
Importance of Preventive Maintenance
Explains that preventive maintenance is required to alleviate equipment deterioration and improve efficiency.
Warranty Implications of Maintenance
States failure to perform maintenance by a licensed technician will result in loss of factory warranty.
General Preventive Maintenance (Annually)
Lists annual general checks including visual inspection, connections, and functional operation.
Coil Maintenance (Annually)
Details annual cleaning of coils, inspecting insulation, and piping connections.
Motor Maintenance (Annually)
Outlines annual motor checks, lubrication, dust inspection, and bearing checks.
Drain Pan Maintenance (Annually)
Covers annual inspection of the drain pan for debris, corrosion, and float switch function.
Electrical Maintenance (Annually)
Includes inspecting for arcing, overheated wires, and ground connection condition.
Filters, Hoses, and Replacement Parts
Filter Replacement Schedule
Details changing disposable filters twice a year and cleaning reusable ones.
Hose Inspection (Annually)
Recommends checking all fittings for leaks and frayed braiding on hoses.
Replacement Parts Recommendation
Strongly recommends using genuine Williams parts and referring to model/serial numbers.
Manual Outside Air Damper Adjustment
Instructions for adjusting the manual outside air damper on LV Units.
Maintenance and Filter Logs
Maintenance / Repair Log
A log to record date, description of service, parts required, and signature for maintenance.
Filter Replacement Log
Filter Replacement Log Entries
A log to record filter replacement dates and signatures.
Comprehensive Installation Checklist
Receiving & Inspection Checklist
Items to check for unit condition, completeness, and correct arrangement.
Handling & Installation Checklist
Checks for mounting, leveling, access, electrical service, and protection.
Cooling/Heating Connections Checklist
Items related to valve protection, piping connections, pressure testing, and drain lines.
Ductwork Connections Checklist
Ensures proper installation of ductwork, fittings, grilles, and insulation.
Electrical Connections Checklist
Covers wiring diagrams, power service connection, and field wiring compliance.
Unit Start-Up Checklist
Includes system inspection, belt tension, fan rotation, voltage, and final settings.
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