Pentair Pool Products MiniMax NT Standard 200 Operation & Installation Manual Download Page 3

Rev. A  1-2-02

             P/N 472032

3

MiniMax NT Standard

Pool and Spa Heaters

Congratulations on your purchase of a MiniMax NT Standard high performance heating system. Proper
installation and service of your new heating system and correct chemical maintenance of the water will
ensure years of enjoyment. The MiniMax NT Standard is a compact, lightweight, efficient, induced-draft,
gas fired high performance pool and spa heater that can be directly connected to schedule 40 PVC pipe. The
MiniMax NT Standard also comes equipped with the Pentair multifunction 7800 temperature controller
which shows, at a glance, the proper functioning of the heater. All HSI (hot-surface ignition) MiniMax NT
Standard heaters are designed with a direct ignition device (HSI) which eliminates the need for a standing
pilot. The MiniMax NT Standard requires an external power source (120/240 VAC 50/60 Hz) to operate.

IMPORTANT NOTICES

...For the installer and operator of the MiniMax NT Standard pool and spa heater. The manufacturer’s
warranty may be void if, for any reason, the heater is improperly installed and/or operated. Be sure to follow
the instructions set forth in this manual. If you need any more information, or if you have any questions
regarding to this pool heater, please contact Pentair Pool Products, Inc. at (800) 831-7133.
These heaters are designed for the heating of swimming pools and spas, and should never be employed for
use as space heating boilers, general purpose water heaters, in non-stationary installations, or for the heating
of salt water.
Do not use the heater to protect pools or spas from freezing if the final maintenance temperature desired is
below 60° F. as this will cause condensation related problems.

CODE REQUIREMENTS

The installation must conform with local codes or in the absence of local codes with the latest National Fuel
Gas Code, ANSI Z223.1, and the latest edition of the National Electrical Code, NFPA 70.
Installation in Canada to be made in accordance with the latest CAN/CGA-B149.1 or .2 and CSA C22.1
Canadian Electric Code, part 1.

Introduction

Summary of Contents for MiniMax NT Standard 200

Page 1: ...tallation and service must be performed by a qualified installer service agency or the gas supplier MiniMax NT Standard Series POOL SPA HEATERS OPERATION INSTALLATION MANUAL WARNING WHAT TO DO IF YOU...

Page 2: ...art Gas Pressure Requirements 12 Regulated Manifold Pressure Test 12 Venting Indoor Installations 13 16 Venting Outdoor Installations 17 Basic Operation General Description 18 Basic Operation Safety C...

Page 3: ...tor of the MiniMax NT Standard pool and spa heater The manufacturer s warranty may be void if for any reason the heater is improperly installed and or operated Be sure to follow the instructions set f...

Page 4: ...h an accurate thermometer Spa or hot tub thermostats may err in regulating water temperatures by as much as 4 F 5 Persons with a medical history of heart disease circulatory problems diabetes or blood...

Page 5: ...ON LIGHTING OPERATION 1 STOP Read the safety information above 2 Set the thermostat to the lowest setting 3 Turn off electric power to the heater 4 This heater is equipped with an ignition device whic...

Page 6: ...state be sure your contractor bears the appropriate license SPECIFICATIONS 24 05 2 in SOCKET A DIM 8 84 6 64 30 63 LEG LEG 14 50 3 50 4 875 MODEL 200 250 24 63 21 63 A DIM 15 50 300 400 34 13 27 63 7...

Page 7: ...und is connected to the ground terminal GND see below Figure 5 NOTE If any of the original wiring supplied with this heater must be replaced installer must supply No 18 AWG 105 C U L approved AWM low...

Page 8: ...troller then the second wire to either the SPA or POOL tab b Now return power to the heater but leaving the temperature controller in the OFF position see Page 22 Note If you used the main power switc...

Page 9: ...erate NOTE The heater factory settings are 78 F for the pool and 104 F for the spa When connecting a remote control to the MiniMax you must install the low voltage thermostat wires in separate conduit...

Page 10: ...ETY GROUND WIRE GREEN HERE CHASSIS BOND LUG EXTERNAL ORG WHT GRN 2 1 3 2 1 4 3 2 5 1 4 3 6 2 1 F2 F1 P11 P10 P7 P4 ORG RED THERMAL FUSE WHT BLU RED SWITCH WATER PRESSURE THERMAL SWITCHES EXHAUST HIGH...

Page 11: ...emperature sensing bulb from the inlet outlet header Note If needed you may cut the wire ties holding them together 5 Remove the 16 bolts holding the main inlet outlet head and return head in place ex...

Page 12: ...e to test the gas line Use soapy water or another nonflammable method A manual main shut off valve must be installed externally to the heater Pipe Sized For Length Of Run In Equivalent Feet l e d o M...

Page 13: ...ombustible materials must be maintained in accordance with type of vent pipe employed in the absence of a clearance recommendation by the vent pipe manufacturer the requirements of the Uniform Mechani...

Page 14: ...non combustible floor or on a non combustible base and in an area where leakage from heat exchanger or water connections will not result in damage to the area adjacent to the heater or the structure W...

Page 15: ...contaminated by corrosive chemical fumes which can void the warranty NOTE The openings listed in Table 2 are free open vent area if the vents incorporate restrictive louvers the vent openings must be...

Page 16: ...walkways must be at least 3 ft above any outside air intake located within a 10 ft radius must NOT be within 3 ft of an inside corner of the structure must be at least 1 ft above grade must be locate...

Page 17: ...ll a minimum of 4 feet below and 4 feet horizontally from any opening to a building see Figure 17 IMPORTANT When locating the heater consider that high winds can roll over or deflect off adjacent buil...

Page 18: ...ee page 21 4 Open the access doors 5 Push in the gas control knob slightly and turn the knob clockwise to OFF See page 5 for Instructions 6 Wait 5 minutes to clear out any gas If you then smell gas ST...

Page 19: ...y switch closes when there is a sufficient flow of water to the heat exchanger to safely operate the heater The switch operation must be verified during initial operation of the heater after installat...

Page 20: ...fan prepurge cycle the hot surface ignitor is activated for a heat up period followed by energization of the gas valve for the trial for ignition period When flame is detected during the trial for ign...

Page 21: ...ION NO REMOTE Each temperature setting in either POOL or SPA mode is settable independently If the Factory s presetting of 78 F for Pool and 104 F for Spa is not desirable you may adjust these setting...

Page 22: ...ure is now set 4 You can leave the right window displaying the set Temperature or by pressing the MODE key you can return to the Time Mode NOTE To re set the Spa Temperature follow the above steps 1 t...

Page 23: ...er Minute setting then press the SET key The Day and Time are now set and the Day icon will be flashing 6 Press the SET and MODE keys at the same time to return to the Operational Mode SET MODE PROGRA...

Page 24: ...tighten the thermostat knob stopper 5 Set time clock to start circulation system no earlier than daybreak The swimming pool loses less heat at this time 6 For pools that are only used on the weekends...

Page 25: ...Then test only once every month or so to be sure it is being maintained See your local pool dealer for help in properly balancing the water chemistry 7 2 6 8 7 0 7 4 7 6 7 8 8 0 8 2 8 4 Add Soda Ash...

Page 26: ...acing heater back in service Insufficient waterflow pump icon displays excessive water temperature high limit icon cause a soft lockout of the firing sequence which means if the cause of the problem c...

Page 27: ...b r e k a e r b t i u c r i C e s u F C n o y d a e t s r o f D E L k c e h c l o r t n o c d a B D n o i t i n g i o n n o t a t s o m r e h T 2 d e r i w s i M A W l a n i m r e t t a e g a t l o v...

Page 28: ...n the cabinet The cause of the fault must be corrected and the one shot fuse replaced before icon can be cleared This fault icon displays whenever there is a failure of either the low gas pressure swi...

Page 29: ...h Replace switch Defective gas controls Call serviceperson On Off switch in OFF position Turn switch to ON Heater Short Cycling Rapid On and Off Operation Insufficient water flow Clean filter and pump...

Page 30: ...472032 Rev A 1 2 02 30 MINIMAX NT STANDARD HEATER Dual Voltage 1 4 3 5 6 8 9 10 12 33 34 36 48 47 46 44 42 43 38 37 18 17 16 15 21 14 32 39 2 7 11 22 23 20 19 35 45 41 40 13 30 27 28 31 26 24 25 29 50...

Page 31: ...y Propane 471907 471913 471925 471931 28 Igniter 1 Gas Manifold Assy Natural Gas 472023 472022 472021 472020 Gas Manifold Assy Propane 472027 472026 472025 472024 Burner Only 2 3 4 6 200 250 300 400 B...

Page 32: ...ident negligence alteration abuse misapplication or misuse The above warranty applies only if the heater is installed and operated in complete compliance with the installation and operation manual pro...

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