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17

Flow Rates

Companion Flange Connections

The inlet/outlet header flange accepts a 1-1/2" copper
tube  or  1-1/4"  galvanized  pipe  as  a  slip  connection
directly into the manifold. The flange is also threaded
for  1-1/2"  pipe  thread.  1-1/2"  CPVC  adapters  (when
available) can also be used.

PVC adapters should not be connected directly to the
header.  The first 4 feet or 2 elbows of plumbing must
be  of  a  high  temperature  material  such  as  CPVC  or
copper  before  transitioning  to  PVC.   This  heater  is  a
low mass and low volume design.  

  
DO NOT use petroleum base assembly fluids (such as
petroleum  jelly  or  lubricating  oil).  If  assembly  lube  is
required,  use  a  silicone-based  compound,  such  as
Amoral, etc.

Pipe Size

Min. gpm

Max. gpm

1-1/4”

20

60*

1-1/2”

20

60*

*When flow rates exceed 60 gpm, an external auxiliary bypass valve
is required. See External auxiliary bypass valve section for details.

Table E: Flow Rates

Inlet/Outlet Header

           Flange Gasket

Header Flange

Pipe

Fig. 15: Header Connections

Automatic Chlorinators and

Chemical Feeders

All chemicals must be introduced and completely dilut-
ed into the pool or spa water before being circulated
through  the  heater.  Do  not  place  chlorine  tablets  or
bromine sticks in the skimmer. High chemical concen-
trations will result when the pump is not running (e.g.
overnight).

Chlorinators must feed downstream of the heater and
have  an  anti-siphoning  device  to  prevent  chemical
backup into the heater when the pump is shut-off.

Unitherm Governor Operation

The  patented  Unitherm  Governor  is  a  thermostatic
mixing valve specifically designed to maintain constant
heater  internal  temperature  between  105  -  115°F
despite continually changing flow rates from the filter
and changing pool temperatures. 

This  narrow  range  is  needed  to  prevent  damaging
condensation  on  the  burners  which  will  occur  if  the
heater  runs  for  any  length  of  time  below  100°F.  It  is
also needed to inhibit scale formation in the tubes by
maintaining temperatures well below accelerated scal-
ing temperatures.

CAUTION:

Do  not  install  PVC  directly  into  the

header flanges.  The initial connection and the first 4
feet  of  plumbing  or  2  elbows  must  be  of  high
temperature material such as CPVC or copper.

NOTE:

High  chemical  concentration  from  feeders

and chlorinators that are out of adjustment will cause
very  rapid  corrosion  to  the  heat  exchanger  in  the
heaters.  Such  damage  is  not  covered  under  the
warranty.

Outlet

Inlet

Unitherm
Governor

Fig. 16: Unitherm Governor Location

NOTE:

It  is  recommended  that  the  heater  be  shut

down  using  its  fireman  switch  15  minutes  prior  to
pump  shutdown,  to  remove  residual  heat  from  the
system.

Содержание 055B

Страница 1: ...r appliance To do so may result in an explosion or fire WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediate...

Страница 2: ...2 Rev 24 reflects the following Changes to Water Chemistry Table A on page 5 Wiring Diagram on page 20...

Страница 3: ...10 Receiving Equipment 10 General Specifications 11 INSTALLATION 11 Code Requirements 11 Base Installation 11 Clearances 11 Outdoor Heaters 13 Indoor Heaters 13 Combustion Air Indoor Units Only 13 Ven...

Страница 4: ...to the heater WARNING CALIFORNIA PROPOSITION 65 This product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm CAUTION Verify proper operatio...

Страница 5: ...atic chemical dosing devices and salt chlo rinators are usually more efficient in heated water unless controlled they can lead to excessive chlo rine level which can damage your heater Further advice...

Страница 6: ...and burner The flame should be blue with a well defined pattern A yellow or floating flame indicates restricted air openings or incorrect orifice size Should this occur shut the heater off and contact...

Страница 7: ...way and hold in Immediately place flame to pilot to light Continue to hold control knob in for about 1 minute after the pilot is lighted release knob and it will pop back up Pilot should remain lighte...

Страница 8: ...ance is equipped with an ignition device which automatically lights the pilot Do not try to light the pilot by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next...

Страница 9: ...s advice before using pools or hot tubs 6 Persons taking medications which induce drowsi ness such as tranquilizers antihistamines or anticoagulants should not use spas or hot tubs MAINTENANCE AND CA...

Страница 10: ...F can seriously damage the heater and will void the warranty For cold climate areas please follow the winterizing procedures listed below Winterizing the Spa Heater When heaters installed outdoors in...

Страница 11: ...accordance with local codes or in the absence of local codes with the latest editions of the National Fuel Gas Code ANSI Z223 1 and the National Electrical Code ANSI NFPA 70 for Canada the latest edi...

Страница 12: ...and at least 18 on the left side of the heater to inspect and de lime the heat exchang er Heaters must not be installed under an overhang of less than three 3 feet from the top of the heater Three 3...

Страница 13: ...llation when equipped with the approved drafthood For Canada indoor installation is restricted to an enclosure that is not occupied and does not directly communicate with occupied area Refer to the la...

Страница 14: ...should be securely guyed or braced to withstand snow and wind loads We recommend use of insulated vent pipe spacer through the roofs and walls For protection against rain or blockage by snow the vent...

Страница 15: ...testing of that system at test pressures in excess of 1 2 psig 3 45 kPa Dissipate test pressure in the gas supply line before reconnecting the heater and its manual shut off valve to gas supply line F...

Страница 16: ...installation is plumbed as follows 1 The inlet side of the filter is plumbed directly to the discharge side of the filter pump 2 The outlet side of the filter is then plumbed to the inlet of the heate...

Страница 17: ...er High chemical concen trations will result when the pump is not running e g overnight Chlorinators must feed downstream of the heater and have an anti siphoning device to prevent chemical backup int...

Страница 18: ...ittent Ignition Device IID System The Electronic Intermittent Ignition Device automati cally lights the pilot and main burners upon a call for the heat The heater is supplied with a dual voltage trans...

Страница 19: ...0V operation 120V ATMOSPHERIC HEATER 120V LOW NOx HEATER SUPPLY SIDE RETURN or NEUTRAL HEATER 4 WIRES H GROUND L L1 RED BLACK B HOT BLACK GREEN GREEN WHITE WHITE Fig 20 120V Wiring 240V ATMOSPHERIC HE...

Страница 20: ...20 Wiring Diagram Millivolt Units with Mechanical Thermostat...

Страница 21: ...21 Wiring Diagram IID Units BL BL BL...

Страница 22: ...ng the knobstop ring to the desired location and retightening the set screw Drain Valve Solid State Thermostat Ignition Control Pressure Switch Burner Pilot Thermal Fuse HIGH LIMITS Located in the Inl...

Страница 23: ...flow on the low speed is insuffi cient to operate the heater This is apparent when the pressure switch cannot be further adjusted or if the heater makes banging noises In these cases the pump must be...

Страница 24: ...emove burner tray See Burner Tray Removal procedure 2 Disconnect pilot tubing from gas valve 3 Remove gas valve with manifold from burner tray 4 Remove manifold from gas valve 5 Reverse above procedur...

Страница 25: ...tely from between fins Avoid excessive water against refractory Combustion Chamber Removal 1 Remove heat exchanger See Heat Exchanger Removal procedure 2 Lift up and remove front and rear refractory s...

Страница 26: ...nlet Inlet Outlet Header Retainer Spring Fig 31 Unitherm Governor Location To test the operation of the Unitherm Governor place in hot water over 110 F and watch for movement against spring If there i...

Страница 27: ...heat exchanger g n i t o o S Highflowrates Reduce by adding manual bypass valve and adjust by putting thermometer in header 1 4 NPT drain opening Set bypass so thermom eter reads between 105 and 110...

Страница 28: ...emain lit attach millivolt meter and read pilot output If below 500millivolt check gas pressure Also check for insects or debris in the pilot burner If main burner fires remove jumper Replace gas valv...

Страница 29: ...nd wire Clean flame rod Check electrical connections between flame rod and module Check for cracked ceramic flame rod insulator Check that pilot flame covers flame rod and is steady and blue Adjust pi...

Страница 30: ...21 5 28 5 V Check transformer 120 V supply correct as necessary TEMPERATURE 105 106 F Control ok RESISTANCE 0 OHMS SHORT CIRCUIT Check system for shorted wires or open circuits Replace sensor if neces...

Страница 31: ...er standard company warranties must be properly tagged with return parts tag completely filled in with the heater serial number model number etc and shipped to the Company freight prepaid If determine...

Страница 32: ...H 12 H 6 H 5 H 4 H 10 H 13 H 2 V 4 S 4 M 3 M 6 S 5 M 1 B 6 M 5 S 4 C 11 P 9 M 1 G 2 B 3 B 5 C 1 M 2 M 3 C 6 C 7 M 1 R 3 S 2 H HONEYWELL MILLIVOLT PILOT HONEYWELL IID PILOT Fig 8132 Fig 8133 9 P 1 P 1...

Страница 33: ...Combination Valve Nat IID 003900F Combination Valve Pro IID 004306F H HEAT EXCHANGER 1 H Heat Exchanger Assy Complete 004694F 2 H Header Tubed Kit 004695F 3 H Baffle Kit 004715F 14 H U G Assy 002546F...

Страница 34: ...t Mounting Bracket IID 004717F Pilot Tube 004078F 15 P Hi Tension Wire IID 002654B Hi Tension Wire w Pilot Electrode 007864F R REFRACTORY 1 R Refractory Block Kit 003544F S SHEETMETAL 1 S Jacket Top 0...

Страница 35: ...35...

Страница 36: ......

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