Raypak 503-2003 Installation And Operating Instructions Manual

Also see for 503-2003: Installation & operating instructions

Raypak 503-2003 Installation And Operating Instructions Manual Manual pdf 44 page image

SECTION D: Start up42of the control system and any gas control which hasbeen under water.• Check around unit for debris and remove combusti-ble products, i.e. gasoline, etc.Pre Start-up Check1. Verify heater is filled with water.2. Check system piping for leaks. If found, repairimmediately.3. Vent air from system. Air in system can interferewith water circulation. If the heater is equippedwith the optional air vent, ensure that it is adjustedbefore firing the heater to make sure all air isvented prior to start-up.4. Purge air from gas line up to heater.Initial Start-upTools Needed• (1) 12-0-12, 24” scale U-tube manometer• (2) 6-0-6, 12” scale U-tube manometer• (1) Phillips screwdriver• (1) Crescent wrench• (1) Multi-meter• (1) Amp probeNOTICE: Digital manometers are not recommended.PreparationWARNING: Do not turn on gas at this time.Check Power SupplyWith multi-meter at incoming power, check voltagebetween:Hot - Common (≈120 VAC)Hot - Ground (≈120 VAC)Common - Ground (< 1 VAC)WARNING: If Common - Ground is > 1 VAC, STOP:Contact electrician to correct ground failure. Failure todo this may burn out 120V-24V transformer, or maycause other safety control damage or failure.Attach Manometers to Measure Pressures1. Turn off main gas valve.2. Attach (1) 12” scale manometer to an upstreambleedle valve on the gas supply pipe to the heater(Measure point “A” in Fig. 39).3. Attach (1) 24” scale manometer to the manifoldpressure tap located on the valve (Measure point“C” in Fig. 39).4. Attach (1) 12” scale manometer near the fan-proving switch. Pull black cap from air pressureswitch tee and connect the manometer. NOTE: Re-tain caps for reinstallation later.Fig. 39: Gas Pressure Measurement LocationCheck Gas Supply Pressure1. Slowly turn on main gas shut-off valve.2. Read the gas supply pressure from the manometer;minimum supply pressure for natural gas is 4.0 in.WC, recommended supply is 7.0 in. WC, mini-mum supply pressure for propane gas is 4.0 in.WC, recommended supply is 11.0” WC (dynamicreadings, full fire input).3. If the pressure is > 14.0 in. WC, turn off the valve.4. Check if the service regulator is installed and/oradjust the service regulator.Start-UpBlower Adjustment1. Turn off power.2. Unplug cap at pressure switch and connect ma-nometer to the tee.3. Close manual firing valve.4. Turn power on.