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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-firing just enough modules to meet
heating demands. GGT systems are available in
400,000 to multi-million Btuh gross input. For
additional information, see Caravan Engineering
Manual, pub. C-30 and Caravan gas application
guide, pub. CG-10-HWG.
Standard Equipment
One per module unless otherwise noted:
Pre-assembled cast-iron heat exchanger with
built-in air separators and insulated jacket.
Base.
Flue collector.
Gas burners, gas orifices and manifold assembly.
Combination gas valve including manual shut-off
and pressure regulator.
Pilot adjustment and automatic pilot
thermocouple safety.
Hi-limit control.
Ratings
GGT SERIES—Gas-Fired/Hot Water
Module pressure and tempera-
ture gauge (unmounted).
Module pressure relief valve
(ASME) (unmounted). Specify 30,
50 or 100 psi.
Control header (unmounted, one
per system).
Draft hood (unmounted).
Spark ignition system.
Hot water supply and return header
assemblies.
Control panel with automatic lead/lag.
Standing pilot available on:
GG-200EC, GG-250EC, GG-300EC
Vent dampers.
External DHW heat exchanger.
Optional Equipment
* Specify gas by name, "Natural" or
"Propane".
† Net ratings are based on piping and
pick-up allowance of 1.15. Slant/Fin
should be consulted before selecting
a boiler for installation having unusual
piping and/or pic
k-up requirements.
Ratings must be reduced by 4% at
2,000 ft.
elevation and an additional
4% f
or every additional 1,000 ft.
ele
vation over 2,000 ft.
‡
Net ratings in square feet based on
emission rate of 150 Btuh/sq. ft.
§
I=B=R gross output.
Modules in excess of 10 should be
piped in parallel in two or more
batteries. For dimension
specifications, refer to Publication
number CG-10-HWG.
Note:
Specify pressure relief setting.
Relief valve is available with
30, 50 or 100 psi.
FOR LARGER SIZES, USE MUL
TIPLES OF THE ABOVE.
®
GGT-400 2 GG-200EC 400 332 1866 280 9.9 14.2 82.0 820
GGT-500 2 GG-250EC 500 402 2333 350 12.0 16.4 80.4 950
GGT-600 2 GG-300EC 600 480 2780 417 14.3 18.4 80.0 1080
GGHT-700 2 GG-350HEC 700 581 3368 505 17.3 20.6 83.0 1230
GGHT
-750 2 GG-375HEC 750 608 3520 528 18.1 20.6 81.0 1230
GGHT-800 2 GG-399HEC 798 654 3786 568 19.5 20.6 82.0 1230
GGT-900 3 GG-300C 900 720 4173 626 21.5 27.6 80.0 1590
GGHT-1050 3 GG-350HEC 1050 872 5052 758 26.0 30.9 83.0 1830
GGHT
-1125 3 GG-375HEC 1125 912 5286 793 27.2 30.9 81.0 1830
GGHT-1200 3 GG-399HEC 1197 981 5686 853 29.3 30.9 82.0 1830
GGT-1200 4 GG-300C 1200 960 5560 834 28.7 36.8 80.0 2140
GGHT-1400 4 GG350HEC 1400 1162 6736 1010 34.7 41.2 83.0 2440
GGHT
-1500 4 GG-375HEC 1500 1216 7046 1057 36.3 41.2 81.0 2440
GGT-1500 5 GG-300EC 1500 1200 6950 1043 35.9 46.0 80.0 2675
GGHT-1600 4 GG-399HEC 1596 1308 7580 1137 39.0 41.2 82.0 2440
GGHT-1750 5 GG-350HEC 1750 1453 8420 1263 43.4 51.5 83.0 3050
GGHT
-1875 5 GG-375HEC 1875 1520 8806 1321 45.4 51.5 81.0 3050
GGHT
-2000 5 GG-399HEC 1995 1635 9473 1421 48.8 51.5 82.0 3050
GGHT-2100 6 GG-350HEC 2100 1743 10104 1516 52.0 61.8 83.0 3660
GGHT-2250 6 GG-375HEC 2250 1824 10573 1586 54.4 61.8 81.0 3660
GGHT-2400 6 GG-399HEC 2394 1962 11373 1706 58.6 61.8 82.0 3660
GGHT-2450 7 GG-350HEC 2450 2034 11788 1768 60.7 72.1 83.0 4270
GGHT-2625 7 GG-375HEC 2625 2128 12333 1850 63.5 72.1 81.0 4270
GGHT-2800 7 GG-399HEC 2793 2289 13266 1990 68.3 72.1 82.0 4270
GGHT-2800 8 GG-350HEC 2800 2324 13472 2021 69.4 82.4 83.0 4880
GGHT-3000 8 GG-375HEC 3000 2432 14093 2114 72.6 82.4 81.0 4880
GGHT-3150 9 GG-350HEC 3150 2615 15157 2273 78.1 92.7 83.0 5490
GGHT-3200 8 GG-399HEC 3192 2616 15160 2274 78.1 82.4 82.0 4880
GGHT-3375 9 GG-375HEC 3375 2736 15860 2379 81.7 92.7 81.0 5490
GGHT-3500 10 GG-350HEC 3500 2905 16841 2526 86.8 103.0 83.0 6100
GGHT-3600 10 GG-399HEC 3591 2943 17060 2559 87.9 92.7 82.0 5490
GGHT-3750 10 GG-375HEC 3750 3040 17620 2643 90.8 103.0 81.0 6100
GGHT-4000 10 GG-399HEC 3990 3270 18953 2843 97.6 103.0 82.0 6100
Gas Caravan ratings and dimensions/hot water models — GGT Series
Model No. *
Consists of
I=B=R Ratings
(MBH)
Input
Gross
Output§
Ship
Wt.
No. of
Htg.
Mod.§
EDR
Water‡
(Sq.
Ft.)
Boiler
Horse-
po
wer
Water
Content
(gal.)
A.G.A.
Combust.
Efficienc
y
I=B-R
Net
Output†
(MBH)
Module
Model
Number