HydroTherm KN-2 - Boiler Model; Electrical Requirements; Boiler Ratings and Specifi Cations

P/N 42-9450 8/08 Copyright 2008 Hydrotherm
Page 6 KN INSTALLATION AND OPERATION INSTRUCTIONS
Boiler ratings and speci cations
2
Boiler model Units
KN - 2 K N - 4
Notes
AFUE (DOE seasonal e ciency) % 92.7 1
CSA Input (Max)
Btuh
Kw
199,000
58.6
399,00
116.8
2
CSA Input (Min)
Btuh
Kw
40,000
11.7
80,000
23.4
2
Maximum allowable working pressure
PSIG
kPa
100
700
Water supply and return connections Inches, NPT 1¼
Boiler water volume
Gallons
Liters
4.75
18.0
7.125
27.0
Shipping weight
Pounds
Kg
510
231
697
315
Operating weight
Pounds
Kg
540
245
753
341
Fuels Natural gas or propane 3
Gas connection size Inches, NPT ½ ¾
Gas supply pressure, minimum
Inches w.c.
mm w.c.
2
50.8
Gas supply pressure, maximum
Inches w.c.
mm w.c.
14
356
Vent connection size
Inches
mm
3
76.2
4
101.6
Vent options Direct Vent or Category IV and II
Combustion air options
Air from boiler room or
ducted to boiler from outside
Combustion air adapter size
Inches
mm
3
76.2
4
101.6
Electrical requirements
Voltage 120 vac/60 hz/1-phase
Current draw (120-volt power line) Amperes 2.75 5
Thermostat anticipator setting Amperes 0 5
Operating control Hydrotherm HeatNet
TM
control 4
Control operation options
Stand-alone
HeatNet
TM
BMS (boiler management system)
4
Control methods
Heat demand (HeatNet or stand-alone)
On/O
BMS (4-20 ma input)
Staging
RS485 digital communication
4
Notes
1
2
3
4
5
DOE Heating capacity is based on standard tests speci ed by the United States Department of Energy.
All capacity ratings above are based on sea level. Input adjustments allow se ing the high  re input and may compensate for moderate altitudes.
For higher altitudes the maximum boiler input will be derated slightly.
 e gas valve is capable of operating with natural gas or LP. See instructions in this manual to adjust for the speci c fuel used.
For additional information, refer to the KN Control manual.
 ermostat anticipator se ing is for a single thermostat connected to a single KN boiler. Also jumper from the Heat Demand terminals to the
IAR1 terminals on the connection board. See the KN Control manual for details.