Additional Information
68
Technical Data
Rated voltage:
120 VAC
Rated frequency:
60 Hz
Rated current:
6.0 A~
Max. ambient
temperature
H
at operation:
32 to 104 ºF
0 to +40 ºC
H
when storing
and transporting:
–4 to +149 ºF
–20 to +65 ºC
Setting of adjustable
electronic high limit 176 ºF
80 ºC
Setting of fixed high limit
safety cut-out:
210 ºF
(fixed setting)
99 ºC
Main fuse:
max. 15 A
Power consumption
H
Burner:
max. 105 W
H
Control unit:
max. 10 VA
Standard heating boiler
Boiler Model
Model No.
WB1A 8-24
WB1A 8-30
Natural gas
CSA input
CSA output/DOE
*1
heating capacity
MBH
kW
MBH
kW
29-80
8.5-23.4
26-72
7.6-21
29-100
8.5-29.3
26-90
7.6-26.4
Net I=B=R rating
*2
MBH
63
78
Heat exchanger surface area
ft.
2
m
2
9.26
0.86
9.26
0.86
Min. gas supply pressure
Natural gas
“w.c.
4
4
Max. gas supply pressure
*3
Natural gas
“w.c.
14
14
A.F.U.E.
%
95.1
95.1
Weight
lbs
kg
95
43
95
43
Boiler water content
USG
ltr
0.82
3.1
0.82
3.1
Boiler max. flow rate
*4
GPM
ltr/h
6.2
1400
6.2
1400
Max. operating pressure
at 210 ºF/99 ºC
psig
bar
45
3
45
3
Boiler water temperature
– Adjustable high limit (AHL)
range
space heating
(steady state)
DHW production (set
point)
– Fixed high limit (FHL)
ºF/
ºC
ºF/
ºC
ºF/ºC
68 to 176/
20 to 80
172/
78
210/99
Boiler connections
Boiler heating supply and return
NPTM (male) “
Pressure relief valve
NPTF (female) “
Drain valve
(male thread)
¾
¾
¾
¾
¾
¾
*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.
5
5
8
1
7
7
5
1
.3
