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Additional Information
Technical Data
Rated voltage:
120 VAC
Rated frequency:
60 Hz
Rated current:
6.0 A~
Boiler Model
Natural gas
CSA input
*1
CSA output/DOE
heating capacity
*2
Net I=B=R rating
Heat exchanger surface area
Min. gas supply pressure
Natural gas
*3
Max. gas supply pressure
Natural gas
A.F.U.E.
Weight
Boiler water content
*4
Boiler max. flow rate
Max. operating pressure
at 210 ºF/99 ºC
Boiler water temperature
– Adjustable high limit (AHL)
range
space heating
(steady state)
DHW production (set
point)
– Fixed high limit (FHL)
Boiler connections
Boiler heating supply and return
Pressure relief valve
Drain valve
*1
Output based on 140ºF / 60ºC, 120 ºF / 49ºC system supply/return temperature.
*2
Net I=B=R rating based on piping and pick-up allowance of 1.15.
*3
If the gas supply pressure exceeds the maximum gas supply pressure value, a separate gas pressure regulator must be installed upstream of the
heating system.
*4
See "Typical System Flow Rates" on page 27 in this manual.
68
Max. ambient
temperature
H at operation:
H when storing
and transporting:
Setting of adjustable
electronic high limit 176 ºF
Model No.
MBH
kW
MBH
kW
MBH
2
ft.
2
m
"w.c.
"w.c.
%
lbs
kg
USG
ltr
GPM
ltr/h
psig
bar
ºF/
ºC
ºF/
ºC
ºF/ºC
NPTM (male) "
NPTF (female) "
(male thread)
Setting of fixed high limit
safety cut-out:
32 to 104 ºF
(fixed setting)
0 to +40 ºC
Main fuse:
–4 to +149 ºF
–20 to +65 ºC
Power consumption
H Burner:
H Control unit:
80 ºC
WB1A 8-24
29-80
8.5-23.4
26-72
7.6-21
63
9.26
0.86
4
14
95.1
95
43
0.82
3.1
6.2
1400
45
3
68 to 176/
20 to 80
172/
78
210/99
¾
¾
¾
210 ºF
99 ºC
max. 15 A
max. 105 W
max. 10 VA
Standard heating boiler
WB1A 8-30
29-100
8.5-29.3
26-90
7.6-26.4
78
9.26
0.86
4
14
95.1
95
43
0.82
3.1
6.2
1400
45
3
¾
¾
¾
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