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INSTALLATION & OPERATING INSTRUCTIONS ® Raytherm Commercial Swimming Pool Heater Models P-926 to P-1826 & P-2100 to P-4001 WARNING: If these instructions are not followed exactly, a fire or explosion may result causing property damage, personal injury or death. FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in the vicinity of this or any other appliance.
WATER CHEMISTRY (Corrosive water voids all warranties) For your health and the protection of your pool equipment, it is essential that your water be chemically balanced. The following levels must be used as a guide for bal- anced water. Other Pool & Spa Recommended Level(s) Fiberglass Pools Fiberglass Spas Types...
CONTENTS WATER CHEMISTRY Wiring Diagram—Models 926–1223 WARNINGS with UG Pay Attention to These Terms Wiring Diagram—Models 926–1826 RECEIVING EQUIPMENT with H-Bypass GENERAL Wiring Diagram—Models 2100–2500 SPECIFICATIONS Wiring Diagram—Models 3001–4001 INSTALLATION SERVICING Code Requirements General Location Of Controls Base Installation Temperature Control Clearances Pressure Switch Combustion Air (Indoor Units Only)
WARNINGS Pay Attention to These Terms Indicates the presence of immediate hazards which will cause severe person- DANGER: al injury, death or substantial property damage if ignored. Indicates the presence of hazards or unsafe practices which could cause WARNING: severe personal injury, death or substantial property damage if ignored. Indicates the presence of hazards or unsafe practices which could cause CAUTION: minor personal injury or product or property damage if ignored.
Raypak recommends that this manual be reviewed Code Requirements thoroughly before installing your Raypak Pool Heater. If there are any questions which this manual does not...
Clearances All Heaters For clearances from combustible surfaces, see Table A below. A minimal vertical clearance of three feet between the upper surface of the flue outlet to a noncombustible material is required. Outdoor Heaters (926– Indoor Heaters 1758) Heater Clearance Heater Clearance...
pipe must have a minimum of 1/4 inch per foot rise (ANSI Z223.1/NFPA 54). and should be supported at not more than five foot The “two-opening” method requires: intervals. Plumber’s tape, criss-crossed, will serve to space both horizontal and vertical piping. 1.
WC propane gas. If an adjustment is needed, remove vent sizes or through-the-wall venting, the optional D seal and turn adjustment screw clockwise Series Power Vent can be used. Consult the factory or , to increase pressure or counter-clockwise your local Raypak representative. , to decrease pressure.
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Code. Under NO circumstances shall bleed lines ter- MANOMETER MANUAL minate in the gas utilization equipment flue or exhaust SHUTOFF VALVE system. GAS PRESSURE TEST UPSTREAM GAS PRESSURE TEST AT GAS VALVE GAS PRESSURE TEST AT HEATER Fig. 6: Gas Pressure Test Points Venting of Diaphragm Gas Components Bleed Line...
Water Connections the low temperature piping. A fireman switch included in the time clock may be used for this purpose with instructions not to override this sequence manually. Location See wiring diagram section for electrical hookup loca- tion of the fireman switch in the electrical circuit. Models 926-1223 With UG NOTE: If piping is used into the heater, this piping The heater requires water flow and positive pressure...
Water Pressure Switch Unitherm Governor Operation On Models 926-1223 built with a Unitherm Governor The patented Unitherm Governor (UG) is a thermo- (UG), a water pressure switch is provided in the heater static mixing valve specifically designed to maintain instead of a flow switch, to shut down the gas valves in constant heater internal temperature between 105°...
Raypak recommends the installation of an air bleed vent at a suitable location (usually the highest point in the plumbing) to remove air from the piping system. These units should be available at your local whole- sale supplier. Raypak does not provide this item.
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3. Remove either the left or right “knock-out” for wir- ing on the poolstat control as shown in Fig. 17. Fig. 13: Poolstat Control Fig. 17: Remove Knockout 4. Attach appropriate conduit and connectors to the poolstat control. 5. Attach wires to the poolstat wire terminals. See Fig.
Valve “B” fully open. (See piping configuration Fig. 20: Installation Location page 15, 16 & 17) 3. Fire your Raypak pool heater and adjust Bypass as necessary. Valve “A” to obtain a heater inlet temperature 3. Drill a 23/32” diameter hole (½” NPT) into the pipe approximately 105°F.
6. As the pool temperature rises to the desired tem- perature as controlled by the Pool aquastat, small adjustments to valves “A” and “B” will be required for optimum performance. Heater temperatures should be checked regularly to prevent heater condensation. The heater inlet temperature can be higher than 105°F without heater damage but operating at less than 105°F inlet can cause dam- age from condensation.
Piping Configurations for Raytherm Commercial Pool Heaters 4 PIPE DIAMETERS MAX. 4 PIPE DIAMETERS MAX. 4 PIPE DIAMETERS MAX. Models 926-1826 with H-Bypass BLENDED WATER TEMPERATURE (THERMOMETER AT HEATER INLET) HEATER OUTLET TEMPERATURE THERMOMETER HEATER THERMOSTAT RECOMMENDED FIELD INSTALLED ISOLATION VALVES FOR SERVICE...
Piping Configurations for Raytherm Commercial Pool Heaters 4 PIPE DIAMETERS MAX. 4 PIPE DIAMETERS MAX. 4 PIPE DIAMETERS MAX. Models 2100 thru 4001 with H-Bypass BLENDED WATER TEMPERATURE (THERMOMETER AT HEATER INLET) HEATER OUTLET TEMPERATURE THERMOMETER HEATER THERMOSTAT RECOMMENDED FIELD INSTALLED ISOLATION VALVES FOR SERVICE...
External Auxiliary Bypass Bypass Valve Valve (Where Required) 926-1223 Models Only An auxiliary bypass valve should be used when flow rates exceed 100 gpm (usually a high performance pump size larger than two HP will exceed this flow rate). This valve is required to complement the func- tion of the automatic bypass valve, particularly when starting the heater in winter or early spring when the spa or pool temperature is below 55°F.
Low Water Cutoff CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause Automatically shuts down burner whenever water improper and dangerous operation. Verify proper level drops below probe. A 3 to 5 second time delay operation after servicing.
SERVICING Temperature Control The pool water temperature is controlled by the General Location Of Controls poolstat. The heater water temperature high limit is controlled by the manual reset high limit. Models 926-1223 with UG Pressure Switch The pressure switch on a unit equipped with a Unitherm Governor ensures that the heater operates only when the filter pump is in operation.
START-UP PROCEDURES Before Start-Up Burners Clean main burners and air louvers of dust, lint and debris. Keep heater area clear and free from com- bustibles, flammable liquids, and chemicals. Do not ADJUSTMENT KNOB obstruct the flow of combustion and ventilating air. Fig.
INSPECTION After Start-Up PROCEDURES Pilot System Checkout Procedure Burners 1. Turn on power to the ignition systems and turn gas supply off. Clean main burners and air louvers of dust, lint and 2. Check ignition module as follows: debris. Keep heater area clear and free from combus- tibles and flammable liquids.
Another method is to remove the heat exchanger, ream tubes and immerse heat exchanger in non-inhib- ited de-scale solvent. RAYPAK TUBE CLEANING KIT Extension Pieces (5) Auger with Carbide Tip Wire Brush - "...
Main Burner and Orifice Heat Exchanger Reassembly Removal 1. Heat exchanger header O-rings should be replaced with new ones. 1. Remove screws and burner hold down bracket. NOTE: If the heat exchanger is sooted badly, the 2. Install inlet-outlet and return water headers and burner hold-down bracket and spacer can become install header retainer nuts and torque nuts even- distorted from direct flame impingement and this...
Procedure For Cleaning Flue Tube Replacement Procedure Gas Passageways On Raypak tube replacement may be affected without Soot can clog areas behind fins and cause eventual rolling, as a temporary means of repair, provided there tube failure. Any sign of soot at base of burners or are two or more tubes rolled into act as stays on left around outer jacket indicates a need for cleaning.
MAINTENANCE AND making sure soot is removed from between fins. (Avoid excessive water against refractory). CARE 5. Reassemble; when heater is fired, some steam will form from wet refractory. This is normal. To be followed one month after initial start-up and then quarterly.
Winterizing Your Heater When heaters installed outdoors in freezing climate areas are to be shut down for the winter, please observe the following step-by-step procedure: 1. Remove the drain plug or open the drain cock located on the inlet-outlet header. On larger heaters with external Unitherm Governor(s) and piping, locate plug at low point of Governor piping, or break connections and rotate inlet fittings 180...
TROUBLESHOOTING IMPORTANT NOTICE These instructions are primarily intended for the use of qualified personnel specifically trained and experienced in the installation of this type of heating equipment and related system components. Installation and service personnel may be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to these instructions.
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*Broken refractory caused by Outer jacket very hot shipping damage or improper (paint blistered) combustion………………………….. Replace refractory panels. Excessive sooting of heat exchanger…………………………... Determine cause of sooting & correct. Calculate temperature in °F/hr……... Heat rise (°F/hr.) = Htr.output Takes long time to heat pool Pool gallonage x 8.33 or spa or refer to heater sizing chart.
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ELECTRICAL (ELECTRONIC IGNITION IID) IID WARNING: HIGH VOLTAGE. qualified technicians ONLY. Intermittent Pilot System TROUBLESHOOTING HONEYWELL S8600 NOTE: Some heaters may be equipped with an ignition module that shuts off pilot gas if the pilot fails to light. To reset, interrupt power to the heater. START NOTE: Before troubleshooting, familiarize yourself with the start-up and checkout TURN GAS SUPPLY OFF.
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Raypak, Inc., 2151 Eastman Avenue, Oxnard, CA 93030 (805) 278-5300 Fax (805) 278-5468 Litho in U.S.A.
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