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 MasterTemp Gas Heater - ( 125,000 BTU's ) - Pentair

 

Pentair - Mastertemp 125

High-Efficiency,
High-Technology Heater
for Bodies of Water Up to 15,000 Gallons

  Brochure   Owner's Manual

The affordable new MasterTemp 125 heater gives you the energy savings and advanced operating features that were only available from much larger heaters. With its revolutionary pre-mixed gas combustion technology, the MasterTemp 125 heater offers 82% thermal efficiency - the highest of any heater in its category. Its 1-1/2" plumbing is ideal for smaller applications, including aboveground pools, spas and inground pools up to 15,000 gallons. Featuring the first ever rotating, digital display offered in its class, the MasterTemp 125 heater provides valuable information conveniently and at the touch of a button. Plus, its lightweight, compact design makes the MasterTemp 125 heater easier to install than any other heater in its class - reducing labor costs which saves you money.

Features

  82% energy efficiency is highest in its class.
  High-performance, affordable heating with premium features.
  1-1/2" plumbing – ideal for smaller bodies of water up to 15,000 gallons.
  Pre-mixed combustion technology for ultra-fast heat-up.
  Rotating digital display
  Certified for low NOx emissions.
  Certified for outdoor and indoor - vented installations.
 
Natural Gas Heater
H2O # Manf. # Description
2240105 461058

125,000 BTU, Natural, Electronic

 

 
 MasterTemp Gas Heater - ( 200,000 thru 400,000 BTU's ) - Pentair


 

Data Sheet
 Owner's Manual
View Water Replacement Parts
 View Burner Replacement Parts
View Electrical Replacement Parts

 

Link to Pentair Pool Product's Website

 

Standard and ASME
Copper Heat Exchangers
84% efficient.

Heavy-Duty (HD)
Cupro-Nickel Heat Exchangers
82% efficient.

 

 

 


MasterTemp™ is a powerful electronic gas heater placed in a space saving enclosure. All four models measure the same cabinet size, ( 21 L x 21W x 28 H ) less vent and water connections. Until you see this heater up close, you won't believe how space saving this heater really is. Heater is power vented and water connections are unionized for easy installation. Controls rotate to 3 positions so there’s no need to reverse the header.

All units are stocked as natural gas heaters. Request conversion kit if propane is required. Quick-change orifice allows easy conversion of gas sources. Propane heaters from the factory are available as a special order item.

Heavy-duty (HD) units are available with cupro-nickel exchangers.
Cupro-nickel stands up to the harshest of applications, like low pH, high flow or heavy use.
 
Natural Gas Heaters
H2O # Manf. # Description
2240109 460730

200,000 BTU, Natural, Electronic
2240119 460732

250,000 BTU, Natural, Electronic
2240120 460806

250,000 BTU, Natural, Electronic, Heavy Duty Cupro-Nickel
2240121 460771

250,000 BTU, Natural, Electronic, ASME
2240122 461020

250,000 BTU, Natural, Electronic, Heavy Duty Cupro-Nickel, ASME

2240129 460734

300,000 BTU, Natural, Electronic
2240139 460736

400,000 BTU, Natural, Electronic
2240140 460805

400,000 BTU, Natural, Electronic, Heavy Duty Cupro-Nickel
2240141 460775

400,000 BTU, Natural, Electronic, ASME
2240142 461021

400,000 BTU, Natural, Electronic, Heavy Duty Cupro-Nickel, ASME


Propane Gas Heaters
H2O # Manf. # Description
2240114 460731

200,000 BTU,  *Propane, Electronic
2240123 460733

250,000 BTU,  *Propane, Electronic
2240133 460735

300,000 BTU,  *Propane, Electronic
2240144 460737

400,000 BTU,  *Propane, Electronic,
2240147 460776

400,000 BTU,  *Propane, Electronic, ASME
*Note - Propane Models are Special Order Only - but conversion kits are available for non-ASME models.


Natural Gas to Propane Conversion Kits
H2O # Manf. # Description
2250921 77707-1461

200,000 BTU,  Natural Gas to Propane Conversion Kit - special order
2250920 460741

250,000 BTU,  Natural Gas to Propane Conversion Kit - special order
2250919 460755

300,000 BTU,  Natural Gas to Propane Conversion Kit - special order
2250917 77707-1441

400,000 BTU,  Natural Gas to Propane Conversion Kit

Kit comes with Instructions and Conversion Label

 

Features:

   Controls rotate to 3 positions so there’s no need to reverse the header.
   Heater is power vented and water connections are unionized for easy installation.
   Optional Quick-change orifice allows easy conversion of gas sources
   Compact design (21 L x 21W x 28 H ) less vent and water connections.
   Certified for low NOx emissions
   Superior “best-in-class” energy-efficiency
   Built-in carrying handles for easy transport
   Top-mounted, large format digital display for easy viewing
   Tough, rustproof exterior handles the heat and weathers the elements
   User-friendly indicator lights make system operation and monitoring a snap
   Safe operation assured through a series of features, including:

   Water pressure switch
   High limit switches
   Manual gas shut-off when service is required
   Stack flue sensor

Pool Sizing

°F Temperature
Change/24 Hrs

Heater Size

Heater Size

Model 200

Model 250

Model 300

Model 400

Model 200

Model 250

Model 300

Model 400

Pool Capacity in Gallons

Pool Surface Area in Sq Ft. at 5.5 ft Depth
5 97,383 121,729 146,075 194,766 2,364 2,955 3,546 4,727
10 48,691 60,864 73,037 97,383 1,182 1,478 1,773 2,364
15 32,461 40,576 48,692 64,922 788 985 1,182 1,576
20 24,346 30,433 36,519 48,691 591 739 887 1,182
25 19,477 24,346 29,216 38,953 473 591 710 945
30 16,230 20,288 24,345 32,461 394 493 591 788
35 13,912 17,390 20,868 27,824 338 423 507 675
40 12,173 15,216 18,260 24,346 295 369 443 591

 

Spa Sizing
  Spa Volume in Gallons
200 300 400 500 600 700 800 900 1,000
Model Minutes for 30° F Temperature Rise ( Heater Input at 1000 BTU per Hour )
200 18.0 27.0 35.0 44.0 53.0 62.0 71.0 80.0 89.0
250 15.8 23.5 30.8 38.5 46.5 54.3 62.0 70.0 77.8
300 13.5 20.0 26.5 33.0 40.0 46.5 53.0 60.0 66.5
400 9.0 13.0 18.0 22.0 27.0 31.0 35.0 40.0 44.0
Note: This chart is based on a 30° F (-1°C) temperature rise,
discounting loses and only based on heat required to raise temperature in minutes.

 

 
 Vent Accessories for MasterTemp

picture
unavailable

 

 

H2O # Manf. # Description
2250902 77707-0076

4" x 6" metal flue collar for indoor vertical,
negative pressure venting
2250907 77707-0077

4" x 8" metal flue collar for indoor vertical,
negative pressure venting
2250912 77707-0086

4" Heat Fab stainless adapter for horizontal or vertical,
positive pressure venting

 

 
 Replacement Copper Heat Exchangers for MasterTemp Gas Heaters - Pentair

 

The proper part name for a heat
exchanger in a MasterTemp is called,
Tube Sheet Coil Assembly.

NOTE: Exchanger replacements on ASME models require that you order the exchanger and the manifold assemble all as one unit.
 ASME Chamber/Heat Exchangers Kits DO NOT INCLUDE Igniter and Gaskets like NON-ASME replacements. Please contact purchasing for information on special ordering these replacements.

 


Exchangers come as a kit, which includes
Igniter, Insulation, Blower / Flameholder Gaskets & O-rings.
Heaters manufactured after 1/12/2009 have a new tub design.
 
Heat Exchanger Replacements for MasterTemp
H2O # Manf. # Description
9875045 77707-0232

Exchanger for 175,000 and 200,000 BTU models -  prior to 1/12/2009
( also fits Sta-Rite Max-E-Therm 200,000 BTU Models ) - Copper
9875046 474058

Exchanger for 175,000 and 200,000 BTU models - after 1/12/2009   
( also fits Sta-Rite Max-E-Therm 200,000 BTU Models ) - Copper

9875050 460747

Exchanger for 250,000 BTU models -  prior to 1/12/2009  - Copper

9875051 474059

Exchanger for 250,000 BTU models -  after 1/12/2009  - Copper
9875055 77707-0233

Exchanger for 300,000 BTU models -  prior to 1/12/2009  - Copper
( also fits Sta-Rite Max-E-Therm 333,000 BTU Models )
9875056 474060

Exchanger for 300,000 BTU models -  after 1/12/2009   - Copper
( also fits Sta-Rite Max-E-Therm 333,000 BTU Models )
9875060 77707-0234

Exchanger for 400,000 BTU models -  prior to 1/12/2009  - Copper
( also fits Sta-Rite Max-E-Therm 400,000 BTU Models )
9875061 474061

Exchanger for 400,000 BTU models -  after 1/12/2009  - Copper
( also fits Sta-Rite Max-E-Therm 400,000 BTU Models )
'HD' Series and 'ASME' models are not listed


Misc Item
H2O # Manf. # Description
9875025 77707-0008

Insulation Kit which is included with exchangers
9875065 77707-0119

Coil / Tubesheet Sealing O-Ring Kit which is included with exchangers
listed above. Kit has 12 Sealing O-Rings which is amount required for
the Mastertemp 400 model. Kit will work on all other smaller models.

 

 

 

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