Raypak X-THERM 1005–2005 Installation & Operating Instructions Manual

Also see for 1005-2005: Specification sheet Specifications

Relief Valve Installation and PipingThe heater is supplied with a Section IV “HV” stampedrelief valve sized for the full input of the unit and a “UV”stamped relief valve to protect the section VIII second-ary heat exchanger. The relief valve assembly isshipped loose and must be mounted directly to theheater outlet. No valve shall be installed between theheater and the relief valves. The relief valves shall bemounted with their spindles vertical (see Fig. 1, 2 and3 on page 6). Relief valve discharge piping shall pro-vide no less than the cross sectional area of the reliefvalve outlet and must be routed to a safe point of dis-charge. Installation must comply with all national, stateand local codes.Temperature & Pressure GaugeThe temperature and pressure gauge is shipped loosefor field installation and must be installed within 12inches of the boiler outlet (if possible) in an easilyreadable location. Installation must comply with ASMESection IV as well as all applicable national, state andlocal codes.Hydrostatic TestUnlike many types of heaters, this heater does not re-quire hydrostatic testing prior to being placed inoperation. The heat exchanger has already been fac-tory-tested and is rated for 160 psi operating pressure.However, Raypak does recommend hydrostatic test-ing of the piping connections to the heater and the restof the system prior to operation. This is particularlytrue for hydronic systems using expensive glycol-based anti-freeze. Raypak recommends conductingthe hydrostatic test before connecting gas piping orelectrical supply.143. For heaters not using a barometric damper in thevent system, and when air supply is provided bynatural air flow from outdoors for a power burnerand there is no draft regulator, drafthood or similarflue gas dilution device installed in the samespace, in addition to the opening for ventilation airrequired in 1., there shall be a permanent air sup-ply opening(s) having a total cross-sectional areaof not less than 1 in. 2 for each 30,000 BTUH (74mm2 per kW) of total rated input of the burner(s),and the location of the opening(s) shall not inter-fere with the intended purpose of the opening(s)for ventilation air referred to in 1. This opening(s)can be ducted to a point not more than 18 in. (450mm) nor less than 6 in. (152 mm) above the floorlevel. The duct can also “goose neck” through theroof. The duct is preferred to be straight down 18in. (450 mm) from the floor, but not near piping.4. Refer to the B149 Installation Code for additionalinformation.Water PipingGeneralThe heater should be located so that any water leakswill not cause damage to the adjacent area or struc-tures.WARNING: Care must be taken to ensure that theequipment room is not under negative pressureconditions. WARNING: Pressure relief valve discharge pipingmust be piped near the floor and close to a drain toeliminate the potential of severe burns. Do not pipeto any area where freezing could occur. Refer tolocal codes.CAUTION: This heater must be installed with aPrimary-Secondary piping arrangement for theintegral pumping system to function properly.NOTE: Minimum pipe size for the heater inlet/outletconnections is dependent on the equivalent length ofpiping between the load loop and the heater loop,the operating conditions and the size of the heater.See Table G on page 16.WARNING: The pressure relief valve must beinstalled at the outlet of the heater. No valve ispermitted to be installed between the heater and therelief valve.California Hot Water Supply, Inc.(800) 249-724414