KS600 572, 000 BTU Output Keystone Condensing Boiler Overview

- Modulation down to 20% of full fire (5:1 turndown)
- Sealed combustion chamber
- Pre-mix stainless steel burner
- Burner site glass
- Low NOx system exceeds the most stringent
regulations for air quality - 10 ppm NOx
- Horizontal or vertical direct vent
- Vent and air pipe lengths of up to 100 equivalent
feet (each)
- Built-in condensate trap
- Vent temperature cutoff
- Direct spark ignition system
- Stainless steel heat exchanger with welded
construction
- ASME “H” stamp
- 75 psi (517 kPa) ASME rated pressure relief valve
for the KS 399, KS 500, KS 600, KS 750 and KS 850
- 125 psi ASME rated pressure relief valve (for the
KW 199, KW 285, KW 399 and KW500)
- Water flow switch (KW 399 only)
- Temperature & pressure gauge
- Drain valve
- Multiple pump control for boiler pump, system pump
and indirect domestic water pump, each with delay
Boiler Specific features
- Indirect water heater priority
- Outdoor reset
- Outdoor air temperature sensor
- Electronic PID modulating control stages up to
eight boilers
- Large graphical display
- Alarm contact
- Accepts (4-20mA or 0-10V) modulation control with
optional signal converter
- Manual reset high limit
- Zero clearance to combustibles
- 10 year limited warranty (for the KS 399, KS 500,
KS 600,KS 750 and KS 850) or 5 year limited warranty
(for the KW 199, KW 285, KW 399 and KW 500)
- Floor-standing appliance
- All connections are on top of the unit
- Easy to service
- Connects to building management systems with
optional interface
- Water Heaters Meet AB1953 standard
- KS 500 - 850 Boilers are CSD-1 Compliant
Standard Equipment & Features
2011-73 Keystone Lit. 071715
Technical Specifications
Model
Input
MBH
Thermal
Efficiency %
Combustion
Efficiency %
57 - 285
80 - 399
KW 285 E
KW 199 E
80 - 399
96.5
KS 399 E
40 - 199
KW 399 E
100 - 500
95.0
KS 500 E
120 - 600
95.3
KS 600 E
150 - 750
96.6
KS 750 E
170 - 850
95.7
96.5
95.0
96.0
96.6
95.7
KS 850 E
95.0
97.0
N/A
N/A
N/A
96.0
100 - 500
KW 500 E
N/A
96.0
Model
Water
Heaters
Boilers
Water
Heaters
Boilers
Connections Size (NPT)
Gas
Water
Air Inlet
Diameter
Vent
Diameter
Dimensions
D x W x H
Weight
Lbs
2"
2"
4"
4"
3"
4"
4"
3"
276
3/4"
26"x 24 1/2" x 38”
KW 285 E
246
1/2"
26"x 24 1/2" x 38”
KW 199 E
1 1/4"
4 "
346
3/4"
31"x 24 1/2" x 38”
KS 399 E
1 1/4"
346
3/4"
31"x 24 1/2" x 38”
KW 399 E
2"
4"
4"
381
1"
31"x 24 1/2" x 38”
KW 500 E
1 1/2"
4 "
381
1"
37"x 24 1/2" x 38”
KS 500 E
1 1/2"
4 "
394
1"
38"x 24 1/2" x 38”
KS 600 E
2"
4 "
469
1 1/2"
51"x 24 1/2" x 38”
KS 750 E
2"
4 "
4"
4"
4"
6"
6"
502
1 1/2"
55"x 24 1/2" x 38”
KS 850 E