14
Boiler
Model
Burner
Input
Rate (gph)
Input
(MBH)
Tankless
Rating
(gpm)‡
BW5(B,R)AH-91
0.65
91
2.90
BW5(B,R)AH-105
0.75
105
3.00
BW5(B,R)AH-140
1.00
140
3.25
BW5(B,R)AH-126
0.90
126
3.15
BW5(B,R)AH-175
1.25
175
3.50
BW5(B,R)AH-210
1.50
210
3.75
BW5(B,R)AH-168
1.20
168
3.45
BW5(B,R)AH-245
1.75
245
4.00
‡ Gallons of water per minute heated from 40°F to 140°F with
200°F boiler water temperature, intermittent draw
SYSTEM PIPING
Boilers may be factory
packaged with tankless heater
coil
see
fi
gure below. Coil provides instantaneous heating
of water for domestic use if proper burner and water supply
line controls are used. Tankless coils are meant to provide
domestic hot water for intermittent draws, not continuous
fl
ow.
NOTICE
Do not use tankless coil if your water is excessively
hard with lime or other deposits which will
accumulate inside the coil.
When using tankless coil, boiler is con
fi
gured so Honeywell
L7248 operates with Honeywell L4006 low limit mounted
on well installed in tankless heater. Mount factory wired low
limit on well.
Tempering valve (mixing valve) is required as shown below.
Flow restrictor may be required on tankless coil inlet piping
so that
fl
ow rates are matched to boiler heat input (see
table).
DANGER
Water temperatures exceeding 125°F will cause
severe burns instantly or death by scalding.
!
Tankless Coil Piping Arrangement
Figure 11 -Tankless Coil Piping Arrangement
Summary of Contents for BW4BAH-91
Page 22: ...22 OPERATING THE BOILER Figure 13 Burner Adjustments and Settings...
Page 28: ...28 ELECTRICAL WIRING Figure 16 Honeywell L7248L Control With Beckett AFG Burner...
Page 29: ...29 Figure 17 Honeywell L7248L Control With Riello F5 F10 Burner ELECTRICAL WIRING...
Page 31: ...NOTES...
Page 32: ...CAC BDP 7310 West Morris St Indianapolis IN 46231...
