ALT-CMD Continuity Monitor Device

ALT-CMD Continuity Monitor Device
NELSON™ HEAT TRACING SYSTEMS
INSTALLATION
ALT-CMD CONTINUITY MONITOR DEVICE
INSTRUCTIONS
DESCRIPTION
KIT CONTENTS
The ALT-CMD continuity monitor device is used to monitor
bus continuity on a parallel type heater cable. After the
heater cable is installed on the pipe, connect the ALT-CMD
to the opposite end of the power connection kit.
1
1
1
1
1
2
CMD Device
Conduit Locknut
Sealing Grommet
Stand-off
Label
Wire Nuts
1
1
1
1
2
Power Termination
Box Adapter
Gasket
Tube of Silicone
Pipe Clamps
Silicone
CMD Device
Box Cover Gasket
Power Termination
Conduit Locknut
Label
Gasket
Box Adapter
Sealing Grommet
J-Grommet - Overjacket Product
B-Grommet - Base Product
U-Grommet - non-standard construction
Stand-off
*Heater Cable
(see warning below)
*Fiberglass Tape
*ITEMS NOT INCLUDED IN KIT
Pipe Clamps
Note: This detail shows Braided “CB” Products only. For Overjacket “J” or “JT” Products see diagram on
sheet 8.
!
WARNING:
Article 427-22 of the National Electrical Code requires that all heaters shall have
metal coverings and be provided with branch circuit ground-fault protection.
P.O. BOX 726
„
TULSA, OK 74101
„
TEL 918-627-5530
„
FAX 918-641-7336 „
www.nelsonheaters.com
GA-2075 Rev.1
Sheet 1 of 9
September 2005
NELSON™ HEAT TRACING SYSTEMS
INSTALLATION
ALT-CMD CONTINUITY MONITOR DEVICE
INSTRUCTIONS
STAND-OFF POSITIONING
Section View A A
(recommend installing at the
4 or 8 o'clock positions.)
!
WARNING:
Do not place pipe clamps
over the heater cable.
8 o'clock
4 o'clock
Pipe Clamps
254mm (10")
A
A
Fiberglass Tape
Stand-off
Fiberglass Tape
Stand-off
(not included in kit)
(not included in kit)
Sealing Grommet
Box Adapter
Power Termination
n
o
p
Mark pipe where stand-off will be mounted.
Push heater cable through bottom opening of stand-off.
Slide the sealing grommet over the heater cable and position inside stand-off opening:
for Braided “CB” Products:
See “Grommet Installation for Braided “CB” Products”, sheet 3.
for Overjacket “J” or “JT” Products
Proceed with step 4 below.
q
r
s
t
Apply silicone around the heater cable on top of the sealing grommet and fill any voids in sealing grommet.
Slide the box adapter over the heater cable and tighten securely to stand-off.
Prepare heater cable for power termination:
for Braided “CB” Products, see sheet 3.
for Overjacket “J” or “JT” Products, see sheet 4.
Terminate heater cable, see sheet 7.
P.O. BOX 726
GA-2075 Rev. 1
Sheet 2 of 9
September 2005
„
TULSA, OK 74101
„
TEL 918-627-5530
„
FAX 918-641-7336 „
www.nelsonheaters.com
NELSON™ HEAT TRACING SYSTEMS
INSTALLATION
ALT-CMD CONTINUITY MONITOR DEVICE
INSTRUCTIONS
SEALING GROMMET INSTALLATION FOR BRAIDED “CB” PRODUCTS
13mm (.5")
n
o
Slide braid back, allowing at least 13mm (.5”) of
heater cable exposed.
Cut and remove 13mm (.5”) of heater cable.
p
q
r
Slide braid back over heater cable and twist
excess braid into a pigtail.
Slide the sealing grommet over the heater cable
and position inside stand-off opening.
Continue with step 4 on sheet 2.
BRAIDED “CB” PRODUCTS
q
127mm (5')
n
o
p
Secure cable braid with fiberglass tape.
Slide braid back 127mm (5”) to create a bulge.
At the bulge, separate the braid to make an
opening.
P.O. BOX 726
„
TULSA, OK 74101
„
TEL 918-627-5530
While bending the heater cable, work it through
the braid opening.
114mm (4.5")
cut off excess braid
r
s
t
Proceed to “LT, CLT & HLT Products”, sheet 5
„
FAX 918-641-7336 „
Pull the braid tight.
Cut off excess braid.
www.nelsonheaters.com
GA-2075 Rev.1
Sheet 3 of 9
September 2005
NELSON™ HEAT TRACING SYSTEMS
ALT-CMD CONTINUITY MONITOR DEVICE
INSTALLATION
INSTRUCTIONS
OVERJACKET “J or “JT” PRODUCTS
!
WARNING:
DO NOT CUT BRAID
127mm (5")
n
o
Lightly cut around cable overjacket 127mm (5")
from the end. Bend cable to break the
overjacket.
Lightly cut overjacket up the center between first
cut mark and the cable end. Bend cable to break
the overjacket.
r
s
p
At the bulge, separate the braid to make an
opening.
While bending the heater cable, work it through
the braid opening.
Remove overjacket from heater cable.
114mm (4.5")
cut off excess braid
q
Move braid back toward the overjacket,
creating a bulge.
P.O. BOX 726
GA-2075 Rev. 1
Sheet 4 of 9
September 2005
„
TULSA, OK 74101
„
TEL 918-627-5530
t
u
v
Pull the braid tight.
Cut off excess braid.
Proceed to “LT, CLT & HLT Products”, sheet 5.
„
FAX 918-641-7336 „
www.nelsonheaters.com
NELSON™ HEAT TRACING SYSTEMS
ALT-CMD CONTINUITY MONITOR DEVICE
INSTALLATION
INSTRUCTIONS
FOR ALL NELSON LT, CLT & HLT PRODUCTS
(See sheet 6 for an alternate stripping method for HLT products.)
102mm (4")
n
o
Lightly cut around cable outer jacket 102mm (4")
from the end. Bend cable to break outer jacket.
Lightly cut the outer jacket up the center
between the first cut mark & the cable end. Bend
cable to break outer jacket.
p
Remove the jacket from the heater cable.
!
r
Starting at the end, pull each bus wire away from
the core material.
Remove exposed core material.
s
t
u
Cut 6mm (0.25") off the end of each bus wire.
Proceed to “Power Termination”, sheet 7.
WARNING:
DO NOT CUT BUS WIRES
q
Shave the core material from the outside of each
bus wire.
P.O. BOX 726
„
TULSA, OK 74101
„
TEL 918-627-5530
„
FAX 918-641-7336 „
www.nelsonheaters.com
GA-2075 Rev.1
Sheet 5 of 9
September 2005
NELSON™ HEAT TRACING SYSTEMS
ALT-CMD CONTINUITY MONITOR DEVICE
INSTALLATION
INSTRUCTIONS
HLT PRODUCTS
ALTERNATE STRIPPING METHOD
102mm (4")
n Lightly cut around cable outer jacket 102mm (4")
o
p
r
from the end. Bend cable to break outer jacket.
Lightly cut the outer jacket up the center
between the first cut mark & the cable end. Bend
cable to break outer jacket.
s
Remove the exposed core material.
Remove the jacket from the heater cable.
t
q
Starting at the end, in the same plane as the
cable, pull each bus wire away from the core
material.
Make a cut inside each bus wire.
P.O. BOX 726
GA-2075 Rev. 1
Sheet 6 of 9
September 2005
„
TULSA, OK 74101
„
TEL 918-627-5530
Remove the remaining core material off the
outside of each bus wire.
Cut 6mm (0.25") off the end of each bus wire.
u
v
Proceed to “Power Termination”, sheet 7.
„
FAX 918-641-7336 „
www.nelsonheaters.com
NELSON™ HEAT TRACING SYSTEMS
ALT-CMD CONTINUITY MONITOR DEVICE
INSTALLATION
INSTRUCTIONS
POWER TERMINATION
!
WARNING:
Bus wires must not touch or cross
while inserting into power termination.
13mm (.5")
apply silicone here
p
q
n
o
Push power termination to overlap jacket.
r
The silicone will set up in about 30 minutes with
a complete cure after 24 hours.
Proceed to “Electrical Connection”, sheet 8.
„
FAX 918-641-7336 „
Insert bus wires into power termination.
Squeeze power termination opening and fill with
silicone.
P.O. BOX 726
„
TULSA, OK 74101
„
TEL 918-627-5530
www.nelsonheaters.com
GA-2075 Rev.1
Sheet 7 of 9
September 2005
NELSON™ HEAT TRACING SYSTEMS
INSTALLATION
ALT-CMD CONTINUITY MONITOR DEVICE
INSTRUCTIONS
CMD DEVICE CONNECTION
Wire Nut
Power Termination
Conduit Locknut
Box Adapter
Note: This detail shows Overjacket “J” or “JT” Products only. For Braided “CB” Products see
diagram on sheet 1.
n
o
p
q
r
s
Place gasket onto the box adapter.
Position the CMD device onto the box adapter and secure it with the conduit locknut.
Connect heater bus wires together with the CMD lead wires using the wire nuts. (See diagram above.)
Make sure all wires are placed inside the CMD device.
Place the box cover and box cover gasket onto the CMD device.
See sheet 9 for “CMD Cable Connections to CM-1 and CM-2/1”.
P.O. BOX 726
GA-2075 Rev. 1
Sheet 8 of 9
September 2005
„
TULSA, OK 74101
„
TEL 918-627-5530
„
FAX 918-641-7336 „
www.nelsonheaters.com
NELSON™ HEAT TRACING SYSTEMS
INSTALLATION
ALT-CMD CONTINUITY MONITOR DEVICE
INSTRUCTIONS
CMD CABLE CONNECTIONS TO CM-1 & CM-2/1
PNL
PNL
Branches are monitored by current
flow on process applications.
CMD
CMD
Long side branch
Short side branch
(under 254mm (10"))
PNL
CM-1
CMD
JB
CMD
JB
(Typ.) Wire & conduit to
series connect segments.
JB
CMD
CMD
Long side branch
will not work
Branch / Tee Piping
(single circuit, multiple cable segments)
PNL
PNL
CMD
CMD
CM-1, CM-2/1
Heater Connection Kit
Pipe
Heater Cable
Field Wiring
CMD
CMD
CMD
will not work
Grouped Segments
(several separate cables through single monitor point)
Nelson Heat Tracing Systems products are supplied with a limited warranty. Complete Terms and Conditions may be found on Nelson's
website at www.nelsonheaters.com.
P.O. BOX 726
„
TULSA, OK 74101
„
TEL 918-627-5530
„
FAX 918-641-7336 „
www.nelsonheaters.com
GA-2075 Rev.1
Sheet 9 of 9
September 2005
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