Raypak WH 0135A Installation & Operating Instructions Manual

Also see for Econopak WH-0090: Installation and operating instructions

10Common VentsManifolds that connect more than one heater to a com-mon chimney must be sized to handle the combinedload. Consult available guides for proper sizing of themanifold and the chimney. At no time should thearea be less than the area of the largest outlet.At the time of removal of an existing heater, the follow-ing steps shall be followed with each applianceremaining connected to the common venting systemplaced in operation, while the other appliances remain-ing connected to the common venting system are notin operation.(a) Seal any unused openings in the common ventingsystem.Fig. 4: Venting Minimum ClearancesWARNING: These heaters must not be connectedinto any portion of mechanical draft systemsoperating under positive pressure. To do so maycause the flue products to be discharged into theliving space causing serious health injury.(b) Visually inspect the venting system for proper sizeand horizontal pitch and determine there is noblockage or restriction, leakage, corrosion andother deficiencies which could cause an unsafecondition.(c) Insofar as is practical, close all building doors andwindows and all doors between the space in whichthe appliances remaining connected to the com-mon venting system are located and other spacesof the building. Turn on clothes dryers and anyappliance not connected to the common ventingsystem. Turn on any exhaust fans, such as rangehoods and bathroom exhausts, so they will oper-ate at maximum speed. Do not operate a summerexhaust fan. Close fireplace dampers.(d) Place in operation the appliance being inspected.Follow the lighting instructions. Adjust tankstat soappliance will operate continuously.(e) Test for spillage at the draft hood relief openingafter 5 minutes of main burner operation. Use theflame of a match or candle, or smoke from a ciga-rette, cigar or pipe to visually check spillage.(f) After it has been determined that each applianceremaining connected to the common venting sys-tem properly vents when tested as outlined above,return doors, windows, exhaust fans, fireplacedampers and any other gas burning appliance totheir previous conditions of use.Fig. 5: Common Venting