Raypak 122-322 - Manual

Fig# 9399 HI-LIMITS WATER OUTLET WATER INLET GAS CONNECTION VIEW PORT PRESSURE RELIEF CONNECTION FLUE EXHAUST COMBUSTION AIRINTAKE Component Locations Fig. 1: Component Locations—Back Fig. 2: Component Locations—Left Side Panels removed for clarity Fig. 3: Component Locations—Front 6 HI LIMITS

General Infor mation Table A: Basic Data Table B: Manifold Data Model No. Quantity of Vent Size (in.) Burners Gas Valves Blowers Flue Intake 122 3 2* 1 4 5 162 4 2* 1 5 5 202 5 2* 1 5 5 242 6 2* 1 5 5 322 8 2* 1 6 5 Model No. Burners per Valve Stages % Fire at Stage A B 1 2 1 2 122 2 1 A AB 66 100 1...

GENERAL SAFETY To meet commercial hot water use needs, the highlimit safety control on this water heater will shut off themain gas valve before the outlet temperature reaches210°F. However, water temperatures over 125°F cancause instant severe burns or death from scalds.When supplying general purpos...

INSTALLATION INSTALLATION Installation Codes Installations must follow these codes: · Local, state, provincial, and national codes, laws,regulations and ordinances. · National Fuel Gas Code, ANSI Z223.1- latest edi-tion (NFGC). · National Electrical Code, ANSI/NFPA 70 - latestedition (NEC). · Standa...

10 Fig. 7: Minimum Clearances from Combustible Surfaces—Indoor Installations When installed according to the listed minimum clear-ances from combustible construction, these heaterscan still be serviced without removing permanentstructural construction around the heater. However, forease of servicing...

11 a motorized sealed damper to prevent the circula-tion of cold air through the heater during thenon-operating hours. Conventional Combustion AirSupply U.S. Installations All Air from Inside the Building The confined space shall be provided with two perma-nent openings communicating directly with a...

12 WARNING: Do not use one permanent opening method if the equipment room is under negativepressure conditions or the equipment is commonvented with other gas-fired appliances. 1. Ventilation of the space occupied by the heater shall be provided by an opening(s) for ventilationair at the highest pra...

13 Low Temperature System Heater requires minimum inlet temperature of 105°F.Consult the following sections for piping details. Temperature & Pressure Gauge The temperature and pressure gauge is factory-mounted in the in/out header. Hydronic Heating Pump Selection In order to ensure proper perfo...

15 Table G: Domestic Water Heater Flow Rate Requirements ΔT = Temperature rise, °F. ΔP = Pressure drop through heat exchanger, ft. SHL = System head loss, ft. (System head loss is based on the heater and tank placed no more than 5 feet apart and 25 feet equivalent length ofpipe and fittings.) gpm = ...

17 Gas Supply Gas piping must have a sediment trap ahead of theheater gas controls, and a manual shut-off valve locat-ed outside the heater jacket. A pounds to inchesregulator must be installed to reduce to gas supplypressure to under 10.5 in. WC. The regulator shouldbe placed a minimum distance of ...

19 Electrical Power Connections Installations must follow these codes: · National Electrical Code and any other national,state, provincial or local codes or regulations hav-ing jurisdiction · Safety wiring must be N.E.C. Class 1 · Heater must be electrically grounded as requiredby N.E.C. · In Canada...

21 SINGLE STAGE TANKSTAT STAGE 1 CONNECTION ATTACH STAGE 1 CONNECTIONS ON HEATER TO THE SINGLE STAGE TANKSTAT AS SHOWN IN THE DIAGRAM ABOVE. 2-STAGE TANKSTAT STAGE 1 CONNECTION STAGE 2 CONNECTION OR STAGE 1 CONNECTION OF HEATER 2 ATTACH STAGE 1 CONNECTIONS ON HEATER TO STAGE 1 CONNECTION ON TANKSTAT...

22 Table H: Venting Category Requirements Combustion Air Supply Exhaust Configuration Venting Category Certified Appliance Material Combustion Air Inlet Material From Inside Building (Non-Direct Venting) Vertical Natural Draft Venting I Type B or and Category I Venting System* Horizontal Thru-wall V...

25 Venting Installation Tips Support piping: · horizontal runs- at least every five (5) feet. · vertical runs - use braces: · under or near elbows Follow items listed below to avoid personal injury orproperty damage. · Cut nonmetallic intake pipe with fine-toothed hack-saw. · Do not use nonmetallic ...

32 Ver tical Direct Vent SystemInstallation These installations utilize the heater mounted blowerto draw combustion air from outdoors and uses thenatural buoyancy of the heated flue products to createa thermal driving head that expels the exhaust gasesfrom the flue. The negative draft must be within...

33 CONTROLS Ignition Control Module The interrupted proved ignition device conserves ener-gy. When additional heat is needed, the combustion airblower starts to purge all air from the combustionchamber for about 15 seconds. On proof of air flow,the air proving switch closes and the igniter is ener-g...

34 Low Water Cut Off (Optional) The low water cut off automatically shuts down theburner whenever water level drops below the level ofthe sensing probe. A 3-second time delay preventspremature lockout due to temporary conditions suchas power fluctuations or air pockets. Fig. 24: Flow Switch Fig. 25:...

36 PRE-START-UP Filling System-Heating Heaters Fill system with water. Purge all air from the systemusing purge valve sequence. After system is purged ofair, lower system pressure. Open valves for normalsystem operation, fill system through feed pressure.Manually open air vent on the compression tan...

37 Attach Manometers to MeasurePressures • Attach 24" scale manometer to the first main gasshut-off valve pressure tapping. • Attach one 12" scale manometer to the manifoldgas pressure tapping. (See gas valve detail onpage 7.) • Attach one 12" scale manometer to — Pull rubbertube from ai...

38 Follow-Up • Safety checks must be recorded as performed. • Turn unit on. After main burner ignition: • Check Manometer for proper reading. • Cycle unit several times and recheck readings • Re-analyze with unit running record or print results. • Remove all Manometers and replace hose, remove jumpe...

39 8. Turn on all electric power to the appliance. 9. Set thermostat to desired setting. The appliance will operate. The igniter will glow after the pre-purge time delay (15 seconds). After igniterreaches temperature (45 seconds) the main valvewill open. System will try for ignition three (3)times. ...

40 Monthly: 1. Check for piping leaks around circulators, mixing valves, relief valves, and other fittings. If found,repair at once. DO NOT use petroleum-based stopleak compounds. 2. Visually inspect burner flame. 3. Visually inspect venting system for proper func- tion, deterioration or leakage. 4....