THERMAL MANAGEMENT SOLUTIONS
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THERMAL MANAGEMENT SOLUTIONS
6. Install thermal insulation.
• A reliable WinterGard system depends on properly installed and
weather-proofed thermal insulation.
• Ensure tha
t type and thickness of the insulation are in accordance
with the information in the heating cable selection tables on
page 3 and that all pipe work—including valves, joints, wall
penetrations, and other elements—has been fully insulated.
• Minimize the potential for mechanical damage to the heating cable
after instal lation by installing the insulation as soon as you have
checked the cable installation.
7. Mark the installation.
• Place “Warning” labels for pipe trace applications on the outer
surface of the insulation at 10-foot intervals (on alternating
sides of the pipe) to indicate the presence of WinterGard electric
heating cable. Additional labels and application tape are contained
in the H903 kit.
8. check the installation
• Prior to powering, check to be sure the heating cable is free of
mechanical damage (cuts, clamps, etc.).
• Visually check all power connections, end seals, splices, and tees for
prope
r installation.
• Using a Megohmmeter, test each circuit according to the instructions
in the “Heating cable testing and maintenance” section below.
HEATING cAbLE TESTING AND MAINTENANcE
Pentair Thermal Management recommends that the insulation
resistance between the bus wires and the heater grounding braid
or metal pipe should be checked during installation using a 2500-
Vdc megohmmeter. Minimum reading should be 1000 megohms,
regardless of length.
Record the original values for each circuit. Take additional readings
during regularly scheduled maintenance and compare to the original
value. If the readings fall below 1000 megohms, inspect cables and
insulation for signs of damage.
If physical damage is found, the entire damaged section must be
removed and a new section of heating cable spliced in using only
approved WinterGard H910 splice kits. Do not repair the damaged
heating cable section.
If physical damage cannot be found, the complete circuit should be
removed and replaced with new WinterGard heating cable.
WARNING: Shock and Fire Hazard. Damaged heating cable
or components can cause electrical shock, arcing, and fire.
Do not attempt to energize damaged cable or components.
Replace them immediately using a new length of heating
cable and the appropriate WinterGard accessories.
ELEcTRIcAL pROTEcTION
voltage rating
H311, H611, and H612
110–120 Vac
H621
208–240 Vac
H622
208–240 Vac
For the maximum heating cable circuit length permitted for a given
circuit breaker rating, refer to Table 3. Limit your circuit length based
on your lowest anticipated start-up temperature.
Ground fault protection:
Pentair Thermal Management and national electrical codes require
ground-fault equipment protection on each heating cable branch
circuit. To reduce the risk of fire caused by damage or improper
installation, circuit breakers such as Square D QO-EPD and QOB-
EPD or equivalent, with a 30-mA trip level, should be used. Alternative
designs providing comparable levels of ground-fault protection may
also be acceptable. For technical assistance, call Pentair Thermal
Management at (800) 545-6258.
Table 3. Maximum heating cable circuit length on pipe
circuit
breaker
rating (A)
Maximum heater length
(ft) per circuit at start-up
temperature
Heating cable type
0°F
40°F
WinterGard 120 v
H311 on pipe
15
150
250
20
200
250
30
250
250
WinterGard plus 120 v
H611 on pipe
15
125
150
20
140
195
30
200
200
WinterGard plus 240 v
H621 on pipe
15
200
255
20
250
340
30
375
400
WinterGard Wet 120 v
H612 on pipe
15
125
150
20
140
195
30
200
200
WinterGard Wet 240 v
H622 on pipe
15
200
255
20
250
340
30
375
400
Note: Maximum circuit lengths are based on start-up load. Steady-state amps
per foot is dependent upon heating cable temperature.
Table 4. product data—WinterGard products on pipe only
Heating cable type
WinterGard
WinterGard plus
WinterGard Wet
H311
H611
H621
H612
H622
Service voltage (V)
120
120
240
120
240
Thermal output at 40°F (W/ft)
3
6
6
6
6
Weight per 100 ft (lb)
6
6
6
9
9
Minimum installation temp. (°F)
0
0
0
0
0
Maximum exposure temp. (°F)
150
150
150
150
150
Exposure to chemicals
None
None
None
None
None
Environment
Use only in dry ordinary
(nonhazardous) areas.
Use only in dry ordinary
(nonhazardous) areas.
Use only in wet or dry ordinary
(nonhazardous) areas.
