Raypak 0133-4001 WH Installation And Operating Instructions Manual

Also see for 260: Installation & operating instructions Installation & operating instructions Brochure & specs

Contents

Raypak 0133-4001 WH Installation And Operating Instructions Manual Manual pdf 24 page image

OPERATING CONTROLSOn models 514-1826, models with mechanicalmodulating controls have one or more RobertshawUnitrol 7000 Series hydraulic snap on thermostaticcombination gas valves. These valves have the pres-sure regulator and 24-volt operator built-in. The hy-draulic actuator will throttle the heater input to adjust thefiring rate and meet the required load. This, in effect,prevents costly fuel consumption, as compared to anon-off cycling heater. The valve has a remote capillarybulb immersed in a well, at the header outlet, to main-tain a constant outlet water temperature. When mul-tiple valves are furnished, they can be staged to givegreater flexibility of control. Standard factory setting isat position 5. Consult the dial setting tag attached to thecontrol for your desired temperature. See chart below.CONTROLS - GENERAL24ELECTRONIC IGNITIONThe intermittent ignition device conserves energyby automatically extinguishing the pilot when desiredtemperature is reached. When additional heat isneeded, the pilot re-ignites electrically, eliminating thefuel costs of maintaining a constant pilot. To assuresafe operation, the gas valve cannot open until the pilotrelights and is confirmed.RELIEF VALVEA new combination temperature and pressure(T&P) relief valve, complying with the Standard forRelief Valves and Automatic Gas Shut-Off Devices forHot Water Supply Systems, ANSI Z21.22, must beinstalled in the opening provided on top of the storagetank at the time of installation. No valve is to be placedbetween the relief valve and the storage tank.The pressure rating of the relief valve must notexceed the 160 maximum working pressure indicatedon the water heater rating plate. The BTUH rating of therelief valve must not be less than the BTUH input of theheater.Connect the outlet of the relief valve to a suitableopen drain. The discharge line must pitch downwardfrom the valve to allow complete draining (by gravity) ofthe relief valve and discharge line. The discharge lineshould be no smaller than the outlet of the valve. Theend of the discharge line should not be threaded orconcealed, and should be protected from freezing. Novalve of any type, restriction or reducer coupling,should be installed in the discharge line. Local codesshall govern installation of the relief valve.ECONOMASTER CONTROLThe Economaster II is an electronic device thatallows the operator to set the desired time for the pumpto run after the heater shuts off. The time is factory-setat 7 minutes and it can be re-adjusted in the fieldanywhere from 3 to 10 minutes.In a conventional system, when the aquastat issatisfied, the main gas valve closes, but the pumpcontinues operating. With the energy-conservingEconomaster II, the heater pump is programmed tocontinue running for an optimum period of time in orderto absorb the residual heat from the combustion cham-ber and use it in the system. The pump then shuts offuntil the next call for heat is received from the aquastat.NOTE: Pump will come on when power is first appliedto the heater.Fig# 9331 Fig # 9330.1