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

Also see for 1005-2005: Specification sheet Specifications

12. Provide adequate ventilation of the space occu-pied by the heater(s) by an opening(s) forventilation air at the highest practical point com-municating with the outdoors. The totalcross-sectional area shall be at least 1 in. 2 of freearea per 20,000 BTUH (111 mm 2 per kW) of totalinput rating of all equipment in the room when theopening is communicating directly with the out-doors or through vertical duct(s). The totalcross-sectional area shall be at least 1 in. 2 of freearea per 10,000 BTUH (222 mm 2 per kW) of totalinput rating of all equipment in the room when theopening is communicating with the outdoorsthrough horizontal duct(s).13. In cold climates, and to mitigate potential freeze-up, Raypak highly recommends the installation ofa motorized sealed damper to prevent the circula-tion of cold air through the heater during thenon-operating hours.TruSeal™ Combustion AirIn addition to the 13 previous steps, combustion airmay be ducted directly to the heater by using PVC,CPVC or sealed single-wall galvanized ducting. Theduct will attach directly to the field installed air collarlocated on the rear of the heater, using three or foursheet metal screws (not supplied) equally positionedaround the circumference of the duct. The screws andduct connection point should be sealed with RTV (notsupplied). TruSeal is generally used when damagingcontaminants are present in the mechanical room. Allducting must be self-supported.12CAUTION: Use TruSeal combustion air ifdamaging airborne contaminants are or may bepresent in the heater area. See the Appendix of thismanual regarding air contamination.8. Remove the debris screen (or cover panel formodel 1005) by removing the six screws holding itin place.9. Install the intake air collar using the six screwsremoved in step 8 above.10. Replace all the access panels.11. Install combustion air direct vent in accordancewith Fig. 27 (horizontal) or Fig. 28 (vertical) of thismanual (pages 27 and 28, respectively).Debris ScreenFig. 11: Remove the Debris ScreenIntake Air CollarFig. 12: Install the Intake Air CollarNOTE: Make sure that the air intake piping isinstalled in a manner that allows full access to the airfilter without damage to the filter.California Hot Water Supply, Inc.(800) 249-724412