Slant/Fin GGT Series Leaflet
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.
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
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
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.
50 or 100 psi.
Control header (unmounted, one
per system).
Draft hood (unmounted).
Spark ignition system.
Spark ignition system.
Hot water supply and return header
assemblies.
Control panel with automatic lead/lag.
Standing pilot available on:
Standing pilot available on:
GG-200EC, GG-250EC, GG-300EC
Vent dampers.
External DHW heat exchanger.
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 pick-up requirements.
Ratings must be reduced by 4% at
2,000 ft. elevation and an additional
4% for every additional 1,000 ft.
elevation over 2,000 ft.
should be consulted before selecting
a boiler for installation having unusual
piping and/or pick-up requirements.
Ratings must be reduced by 4% at
2,000 ft. elevation and an additional
4% for every additional 1,000 ft.
elevation 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.
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.
30, 50 or 100 psi.
FOR LARGER SIZES, USE MULTIPLES 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-
power
Water
Content
(gal.)
A.G.A.
Combust.
Efficiency
I=B-R
Net
Output†
(MBH)
Module
Model
Number