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Modular Boiler Submittal Data
A Caravan modular boiler system consists of
two or more compact cast-iron boilers that offer
significant advantages in terms of installed
cost, efficiency and reliability. Caravan
systems are based on step-fir
ing just enough
modules to meet space heating demands.
LDZO systems are available in 602,000 to
multi-million Btuh gross input. For additional
information, see Caravan Engineering
Manual, pub. C-30.
Standard Equipment
One per module unless otherwise noted
Pre-assembled cast-iron heat exchanger
with insulated jacket
Flame retention oil burner, with nozzle;
cadmium sulfide flame detector
Primary burner control
System pressure gauge and siphon
(unmounted, one per system)
Module pressure gauge and siphon
(unmounted)
Module pressure relief valve (ASME)
(unmounted) 15 PSI.
Draft regulator (unmounted)
Flue brush
ASME Required Options
67 Low water cut off (one per module)
PA404A Pressure control (one per module)
67M Lo
w water cut off (one per system)
L4079B Manual reset pressure control
(one per system)
Module drain cock
(unmounted)
Water level sight glass
(unmounted)
LDZO SERIES—Oil-Fired/Steam
Ratings
Oil Caravan ratings and dimensions/steam models — LDZO Series
LDZO-600-2-5 2 4.3 602 500 85.90 375 1563 14.9 21.4 1426 3"
LDZO-750-2-6 2 5.2 728 596 85.80 447 1863 17.8 25.2 1630 3"
LDZO-850-2-7 2 6.0 840 684 85.50 513 2138 20.4 29.0 1838 3"
LDZO-900-3-5 3 6.4 896 750 85.90 563 2345 22.4 32.1 2139 3"
LDZO-1100-3-6 3 7.8 1092 894 85.80 671 2796 26.7 37.8 2445 5"
LDZO-1300-3-7 3 9.0 1260 1026 85.50 770 3208 30.6 43.5 2756 5"
LDZO-1700-4-7 4 12.0 1680 1368 85.50 1035 4313 40.9 58.0 3675 6"
LDZO-2100-5-7 5 15.0 2100 1710 85.50 1319 5496 51.1 72.5 4594 6"
Model No.
No. of
Heating
Modules
Burner
Capacity
(GPH)*
Input
(MBH)
Net
Output
MBH†
Comb.
Efficiency
Sq.Ft
Steam‡
Horse-
power
Boiler
Water
Content
(gal)
Recom-
mended
Header
Size
Weight
with
W
ater
Gr
oss
Output
MBH
* Light oil, 140,000 Btu. per gallon.
† Net ratings are based on piping and pick-up allowance of 1.33.
Slant/Fin should be consulted before selecting a boiler for
installation having unusual piping and/or pick-up requirements.
For higher elevations, input may need to be reduced
‡ Based on 240 Btuh per square foot E.D.R.at 215˚F average
steam temperature.
Modules in e
xcess of 5 are piped in parallel in two or more
banks.
®
I=B=R
Ratings f
or No. 2 Oil