Submittal Sheet

Standard Equipment
• High efficiency condensing Stainless steel heat exchanger
• Modulation down to 20% of full fire (5:1 turndown)
• Sealed combustion chamber
• Pre-mix stainless steel burner
• Low NOx system meets 2012 SCAQMD requirement for
air quality - less than 10 ppm NOx
• Horizontal or vertical direct vent
• Horizontal vent and air terminals
• Vent and air pipe lengths of up to 100 equivalent feet (each)
• Built-in condensate trap
• Vent temperature cutoff feature
• Direct spark ignition system
• Sensor for domestic water tank included
• 160 psi maximum working pressure
• Stainless steel heat exchanger with welded construction
(no gaskets)
• ASME “H“ stamp
• 125 psi (861 kPa) ASME rated pressure relief valve
• Water flow switch (KW 399 - 850 only)
• Temperature & pressure gauge
• Drain valve
• Electronic PID modulating control
• Large user-interface and display
• Alarm output
• Accepts external (4-20 mA or 0-10 V with supplemental
kit) modulation signal
• On/off service switch
• Manual reset high limit
• Burner site glass
• Zero clearance to combustible surfaces
• Built-in cascade function for up to eight Keystone water
heaters
• 5 year limited warranty on heat exchanger
Water Heater
Engineering Submittal Data
Sizes: KW 199 - 850
2012-14 Keystone Water Heater SubmittalDate 2/22/12
Model:
Number of units:
1
Water Heater Data
Model
Input
MBH [kW]
Output
MBH [kW]
Thermal
Efficiency
%
Gas Conn.
Sizes
Inches
Water Conn.
Sizes
Inches
Shipping
Weight
Lbs [Kg]
KW 199 199 [58.3] 193 [56.6] 97.0 1/2 NPT 1 1/4 NPT 246 [111]
KW 285 285 [83.5] 272 [79.8] 95.6 3/4 NPT 2 NPT 276 [125]
KW 399 399 [117.0] 374 [109.7] 96.3 3/4 NPT 2 NPT 346 [157]
KW 500 500 [147.0] 483 [141.7] 96.7 1 NPT 2 NPT 381 [173]
KW 600 600 [175.8] 576 [167.0] 95.3 1 NPT 2 NPT 390 [177]
KW 750 750 [219.8] 723 [208.9] 96.6 1 1/2 NPT 2 NPT 454 [206]
KW 850 850 [249.1] 810 [236.7] 95.7 1 1/2 NPT 2 NPT 493 [224]
Sizing Data