®
Chromalox
SERVICE REFERENCE
Installation, Operation
DIV.
SALES
REFERENCE
SEC. GCHMT
NUMBER 3001
and
(Supersedes PF465)
PE436
161-303183-001
RENEWAL PARTS IDENTIFICATION
DATE
AUGUST, 1994
Chromalox Type GCHMT Circulation Heater For
Steam, Gas and Air Heating
Specifications — Table A
Watts
Per
Dimensions (in.)
Catalog
Number
Voltage
120
Phase
1
KW Sq.In.
A
B
C
GCHMT-30105
GCHMT-3105
GCHMT-30305
GCHMT-3305
GCHMT-30505
GCHMT-3505
GCHMT-30755
GCHMT-3075
GCHMT-30905
GCHMT-3905
15
1
20-1/2
9-3/8
—
240 or 480
1 or 3
23
15
240 or 480
240 or 480
240 or 480
240 or 480
1 or 3
1 or 3
1 or 3
1 or 3
3
30-5/8
22-1/2
16-1/2
(Std.)
23
15
56-3/8
30-5/8
67-1/8
56-3/8
78-1/8
56-7/8
45-1/4
22-1/2
56
39-1/4
16-1/2
50
5
23
15
7.5
23
45-1/4
67
39-1/4
61
15
9
23
45-1/4
39-1/4
WARNING: Safe operating conditions depend on operating pressure, mass velocity
of gas and discharge temperature of the gas. At a given discharge gas temperature
heater element sheath temperature, and pipe body temperature tend to increase as gas
flow (mass velocity) decreases. The standard GCHMT has a 750˚F limitation on the
carbon steel body and a 1500˚F limit on the incoloy sheath elements. Check factory if
any doubt exists as to temperatures that will be encountered in your specific applica-
tion. A stainless steel body is required at pipebody temperatures above 750˚F.
(Std.)
GENERAL
DANGER: This heater is not intended for use in hazardous
atmospheres where flammable vapors, gases, liquids, or
other combustible atmospheres are present as defined in
the National Electric Code. Failure to comply can result in
explosion or fire.
plug. The assembly is surrounded by 1-1/2” insulation and sheet
metal jacket.
Depending upon the specifications, the GCHMT may or may
not be factory equipped with AR or other Chromalox thermostats.
Such thermostats function to control outlet temperatures under
abnormal flow condition. These controls do not fail-safe.
Hazardous area terminal enclosures are available, consult your
local Chromalox representative for details.
WARNING: Users should install adequate back-up controls
and safety devices with their electric heating equipment.
Where the consequences of failure may be severe, back-up
controls are essential. Although the safety of the installation
is the responsibility of the user, Chromalox will be glad to
make equipment recommendations.
The GCHMT series is a general-purpose gas or steam circula-
tion heater intended for use indoors.
The 3 incoloy-sheathed tubular elements are centered in a 3”
diameter steel heating chamber and welded to a removable screw
INSTALLATION
WARNING: Hazard of electric shock. Disconnect all power
before installing heater.
due to temperature. This can be accomplished by using a slotted
mounting assembly on either of the lugs.
5. DANGER: Hazard of fire. Provide minimum of 6” spacing
from a chamber and related piping to nearest combustible materi-
al. Avoid operation of heater near combustible fluids or in com-
bustible vapor or gas laden atmosphere.
6. Provide adequate space at terminal end to permit withdrawal
of the heater from chamber should servicing be required.
7. If two or more heaters are needed to provide the needed heat-
ing capacity, arrange them for series gas or vapor flow.
8. DANGER: Possible explosion. A pressure relief valve
should be provided by customer at outlet of vessel. There should
be no other valving between vessel and valve.
1. Vertical mounting (axis of chamber vertical as in sketch
above) is preferred. Check factory for recommendations on hori-
zontal mounting.
2. To avoid excess temperatures at electrical wiring, mount
heater with terminal enclosure at bottom, and use lower nozzle as
inlet to the circulating steam, air, or gas.
3. The GCHMT series of circulation heaters are provided with
mounting lugs to support the heater chamber. Refer to sketch
above for location of these mounting lugs.
4. Mount heaters to permit unrestrained expansion of chamber
© 2010 Chromalox, Inc.
Download from Www.Somanuals.com. All Manuals Search And Download.
|