Checklist For Problem-Free Installation And Safe Operation; Typical Installation Schedule For The Hwat-Plus System; Circuit Protection, Testing And Operation For All Systems - Raychem HWAT-ECO Bedienungsanleitung

5.4 Checklist for problem-free installation and safe operation

5.4.1 Typical installation schedule for hot water temperature maintenance
General order of events:
l The system is designed and the installation planned.
l The pipework is pressure tested or otherwise checked for leaks.
l The HWAT-L/R/M cable is tested and then installed on the designated pipes.
l The components are installed and each circuit is tested.
l The correct thermal insulation is applied, without delay, labelled and system
test repeated.
l The supply voltage cables and circuit breakers are installed to each circuit.
l The system is commissioned (see "System start-up" on page 30).

5.4.2 Circuit protection, testing and operation for all systems

Circuit protection
l Supply voltage 230 VAC, 50 Hz
l The required protective measures of the relevant regulations must be com-
plied with.
l C type circuit-breaker (anti-surge fuse)
l Residual current device (rcd 30 mA) required. Maximum approx. 500 m of
self-regulating heating cable can be monitored per rcd.
Testing
l Visual inspection for damage and fault-free installation of the accessories
l Proper installation of the system
l Heating cable affixed to all necessary pipes
l No mechanical damage to heating cable (e.g. cuts, cracks, etc.)
l No thermal damage
l Proper connection of all components including power supplies
l Insulation resistance measurement when heating cable is received and
before and after installation of the thermal insulation. The test voltage
should be 2500 VAC, but it must not be lower than 500 VAC. The insulation
resistance, irrespective of the cable length, must not be less than
10 MW. If the resistance falls below this value, the source of the fault must
be investigated, eliminated, and re-tested.
• Measurement : Phase and neutral to the braid
l After switching on, the cable ends must be warm after 5 to 10 minutes.
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