Rooftop Water Heater Model SRT80 120NE COMMERCIAL GAS WATER HEATER GAS-FIRED POWER BURNER FOR DOMESTIC HOT WATER • INSTALLATION • OPERATION • SERVICE • MAINTENANCE • LIMITED WARRANTY Thank you for buying this energy efficient water heater from State Industries. We appreciate your confidence in our products. WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
ROOFTOP SRT80-120NE ROUGH-IN-DIMENSIONS TOP VIEW RIGHT SIDE VIEW LEFT SIDE VIEW FRONT VIEW GAS VALVE PIPING SRT80-120 1/2" NPT Table 1. RECOVERY CAPACITIES - NATURAL GAS / L.P. Model SRT80-120 BTU Input Approx. Gallon Capacity 120,000 35.
INSTALLATION INFORMATION OUTBACK Installation Information Model: SRT80-120NE series Electrical: 120/24VAC/60 Hz/5 A Maximum Inlet Pressure: 14"WC Manifold Pressure: 4.50"WC Minimum Inlet Pressure: 6.2"WC Input: 120,000 btuh Side Clearances: 0" Top Clearances: 1.
FOREWORD This design complies with the current edition of ANSI Z21.10.3 as an automatic circulating tank type water heater and automatic storage water heater. In addition to these inst ruct ions, the equipment shall be installed in accordance with all local codes. The authority having jurisdiction should be consulted before installing. Detailed installation diagrams are found in this manual.
Figure 1 shows the approximate time-to-burn relationship for normal adult skin. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20°F/-11°C. If you experience this type of use, you should consider using lower temperature settings to reduce scald hazards. FEATURES IMPORTANT IT IS REQUIRED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE HEATER.
HIGH LIMIT SWITCH (E.C.O.) The top immersion well of the upper probe also contains the high limit (energy cutoff) sensor. The high limit switch interrupts the main burner gas flow should the water temperature reach approximately 199°F/93°C. Should the high limit switch activate, it must be reset by cycling power to the unit. The water temperature must drop below 180°F/ 82°C before the controller can be reset.
HOT RETURN RECIRCULATION PUMP BLOWER ASSEMBLY The hot return recirculation pump circulates the hot water through the hot water line to eliminate delays at plumbing fixtures, see Figure 5. The blower assembly functions by pulling in air from outside the unit to supply to the burner assembly for proper combustion. The blower pushes the air through the burner assembly and heat exchanger where the flue gases then exit the exhaust system assembly, see Figure 8.
AIR HOSE CONTROL SYSTEM The air hose is used to provide a flexible air path from the blower to the burner assembly. It is held in place with two standard hose clamps, see Figure 10. The control system is comprised of an Outdoor Interface Module that monitors the functions of the WR ignition system, pressure switches, low water cutoff and temperatures in the tank. FIGURE 10 FLUE ADAPTER The flue adapter is made of a flat metal plate with an exhaust adapter to mate with the exhaust elbow.
LOW GAS PRESSURE SWITCH OIM - OUTDOOR INTERFACE MODULE The Low Gas Pressure Switch is a single pole, normally open pressure switch that will close its contacts when a rising pressure of 6.2 inches (1.53 kPa) w.c. is encountered. The contacts will open when the pressure falls below the fixed set point of 6.2 inches of w.c. The Low Gas Pressure Switch monitors the gas supply pressure to the heater. If the gas supply falls below the 6.2 inches of w.c.
grounding screw to tie into the metal panel to assure the unit is grounded, see Figure 23. LOW WATER CUTOFF BOARD AND PROBE The Low Water Cutoff Board and Probe monitors the water level to confirm the tank is completely full. This function is very important when the unit is first filled with water and when complete loss of power is encountered during freezing temperatures (in case the unit drains while using the anti-freeze kit), see Figure 20.
FLAME SENSOR CABINET ASSEMBLY CABINET PANELS There are five panels that comprise the cabinet assembly. The ends of the cabinet allow access to all controls and plumbing. Please confirm all joints are attached correctly and sealed to prevent water leakage inside the cabinet, see Figure 26. The flame sensor is used to sense the burner flame.
FIGURE 29 WARNING FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON OR ADJACENT TO THE HEATER. OPEN CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER. the unit full of water. (Full weight of approximately 1300 lbs. Add extra load and safety factors.) This is very important and the user's responsibility, see Figure 29.
FIGURE 30 RIG AND PLACE UNIT Be sure that unit is installed such that snow will not block the combustion intake or flue outlet. Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across the roof. Level the unit by using unit frame.
OUTDOOR STAND WARNING DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CONTACT A QUALIFIED INSTALLER OR SERVICE AGENCY TO REPLACE A FLOODED WATER HEATER. DO NOT ATTEMPT TO REPAIR THE UNIT ! IT MUST BE REPLACED! This rooftop water heater is approved for an outdoor installation with an optional stand. Contact State Order Entry to acquire optional stand kit. The rooftop stand is constructed of a tubular steel frame along with tubular steel legs. See Figure 32.
VENTING WARNING THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION. WARNING NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO THE OUTDOORS AND HAS ADEQUATE AIR SUPPLY TO AVOID RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR ASPHYXIATION. CAUTION DO NOT TERMINATE THE VENTING WHERE NOISE FROM THE EXHAUST OR INTAKE WILL BE OBJECTIONABLE.
WARNING Apply joint compounds (pipe dope) sparingly and only to the male threads of pipe joints. Do not apply compound to the first two threads. Use compounds resistant to the action of liquefied petroleum gases. THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER THAN 14.0" WATER COLUMN (1/2 POUND OR 3.45 kPa PER SQUARE INCH) SUPPLY GAS PRESSURE. HIGHER GAS SUPPLY PRESSURES REQUIRE SUPPLEMENTAL REDUCING SERVICE REGULATION.
Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply. bypass) is installed in the cold water line between the water heater and street main (or well). RELIEF VALVE Excessive pressure may develop causing premature tank failure or intermittent relief valve operation. This type of failure is not covered by the limited warranty.
FIGURE 36
OPERATION MENU NAVIGATION The EMC-5000 Interface has 5 buttons on the touch panel of the interface. The EMC-5000's menus are navigated through the touch panel, as shown to the right, which can be found on the outdoor and remote interface box. Basic navigation through the menus begins with the Main Menu.
Menu Tree Main Menu Temperatures Outlet Tank System Status LWCO Description Displays the temperature of the outlet tank probe. Displays the temperature of the probe located in the tank. Low Water Cut-Off status. The status can be either Closed or Open. A Closed status indicates that there is not a low water condition in the tank. An Open status indicates that there is a low water condition in the tank. ECO Emergency Cut-Off status. The status can be either Closed or Open.
the control will automatically return to step 5 and repeat the entire operating cycle. During this entire process, if the control detects an improper operating state for external devices such as the ECO switch, blower prover switch, etc., the appropriate indication will be given on the interface modules. SEQUENCE OF OPERATION 1. When the control is powered up the outdoor interface and the remote interface should display a blank line and copyright on the 2-line display. 2.
The following are fault conditions related to the ignition module: Fault: I.M. IGNITER There is a problem with the ignition module Fault: I.M. LOCK OUT I.M Failed an internal hardware or software check Possible Cause 1. Ignition Module Failure Possible Cause Remedy 1. Replace Ignition Module Fault: I.M. PS CLOSED The pressure switch is stuck closed Possible Cause Remedy 1. Pressure switch is shorted 1. Check and replace wiring or not wired properly 2. Defective pressure switch 1.
OPERATING INSTRUCTIONS IMPORTANT IT IS RECOMMENDED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE HEATER. AT THIS TIME THE USER SHOULD ASK THE TECHNICIAN ANY QUESTIONS IN REGARD TO THE OPERATION AND MAINTENANCE OF THE UNIT. CAUTION BEFORE PROCEEDING WITH THE OPERATION OF THE UNIT, MAKE SURE HEATER AND SYSTEM ARE FILLED WITH WATER AND ALL AIR IS EXPELLED FROM HEATER AND PIPING.
e. Repeat steps (c) and (d) until the specified input rate is achieved. is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. There should be no smoking or open flame near the faucet at the time it is open. f. Turn the manual gas valve to “OFF”. Replace the pressure regulator cover screw. Remove the pressure gauge or manometer from the manifold pressure tap. Replace the set screw in the manifold pressure tap.
FOR YOUR SAFETY READ BEFORE OPERATING WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES. A. This appliance does not have a pilot. It is equipped with an ignitor device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas.
GENERAL INFORMATION MAINTENANCE SCHEDULE POWER BURNER Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician. The SEQUENCE OF OPERATION is provided on page 21 and the INITIAL START-UP procedure of the unit on page 23. FLUSHING HIGH LIMIT 1. 2. 3. 4. The high limit switch (not adjustable) is factory set to cutout at 199°F (93°C).
Sediment and lime scale removal may be accomplished through the cleanout opening furnished on the heater. The heater must be drained, see DRAINING, before removing cleanout cover on tank. DRAIN VALVE AND ACCESS PANELS The heater is equipped with a 3/4" drain valve. An access panel covers the front of the tank. To dissolve and remove the more stubborn mineral deposits, SRT80-120NE UN•LIME® Professional Delimer should be used.
INSTALLATION DIAGRAMS ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED NOTE: CONNECT RETURN LINE FROM HOT WATER CIRCULATING LOOP (IF USED) TO COLD WATER INLET LINE.
TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE WITH OR WITHOUT BUILDING RECIRCULATION DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 5. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.
TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE WITH OR WITHOUT BUILDING RECIRCULATION TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER HEATER) WITH OR WITHOUT BUILDING RECIRCULATION FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT SPECIFICATIONS. CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.
TWO TEMPERATURE - TWO HEATERS (ONE PRE-HEATER/ONE BOOSTER HEATER) WITH OR WITHOUT BUILDING RECIRCULATION * PIPE RELIEF VALVE TO OPEN DRAIN DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 5. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. ** 140°F (60°C)TO 150°F (66°C) SHOULD BE MAXIMUM WATER TEMPERATURE MAINTAINED IN THE PRE-HEATERS.
TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE WITH RECIRCULATION OF SANITIZING LOOP DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 5. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.
CHECKLIST AND SERVICE INFORMATION WATER HEATER MAKES SOUNDS IMPORTANT The installer may be able to observe and correct certain problems which might arise when the unit is put into operation or when it is re-fired after a prolonged shutdown. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater. 1. Sediment or lime scale accumulations cause rumbling and pounding noises when the heater is operating.
If there is 24V AC at the gas valve during the four second ignition trial and the manifold pressure does not increase above 0" W.C. then verify that the manual gas control valve is in the “ON” position. If the valve is in the “ON” position and the previous voltage and gas pressure conditions are met, then the gas valve is defective and must be replaced. NOTE: ANY BYPASS OR ALTERATION OF THE UNITS SAFETIES WILL RESULT IN VOIDING THE APPLIANCE WARRANTY.
MODEL SRT80 120NE LIMITED WARRANTY State Water Heaters, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1.
500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN 37015 Phone: 800-821-2017 Fax: 800-644-9306 www.statewaterheaters.