17
Cylinder & Hydraulic Components Install Guidance
(continued)
Immersion Heaters
Only immersion heaters with a thermal high limit cut-out may be used. The immersion heater has a 1 3/4” BSP
thread. They are rated at 3kW at 240v and are of low noise construction. They have both a control thermostat
and a high limit cut-out. Please order the correct replacement, fitting non-approved immersions may affect your
guarantee. When fitting, ensure the ‘O’ ring is positioned correctly on the head of the immersion heater and
lubricate before fitting. Fit it by hand until almost home and then tighten gently as the ‘O’ rings will seal easily.
The electrical supply to each immersion heaters must be fused spur rated at 16A via a double pole isolating
switch to BS 3456. The cable must be at least 2.5mm
2
heat resistance (85°C HOFR) sheathed flex complying
to BS 6141:1981.
In all cases it is the responsibility of the electrician to select and certify the cabling and fuse rating of the immersion
heater circuit. Do not operate the immersion heater/s until the unit is full of water. Do not operate the immersion
heater if any sterilisation liquid is in the cylinder as this will cause premature failure. To complete the wiring use the
appropriate wiring diagrams in the electrical installation section of this manual. Ensure that if internal control stat is
fitted it is set higher than the target on the main controller.
Connecting To The Cylinder
All of the pipework connections on the cylinder are 22mm compression and supplied complete with gland nuts
and olives in the Accessory Kit box. Only connect 22mm copper tube to these connections. Cut the tube with a
pipe cutter and ensure no sharp edges or burrs protrude. Slide both the gland nut and olive onto the tube and
push the tube fully home into the connection ensuring the tube end fully bottoms on the connection recess.
Smear the outer wall of the olive with plumbing paste and tighten the gland nut in the prescribed manner.
Upon filling / commissioning ensure all connections are completely watertight.
Note: No control or isolation valve should be fitted between the expansion relief valve and the storage cylinder.
The relief valve connections should not be used for any other purpose. Check all the connections for tightness
including any factory made connections
Compact Filter - Intaeco Duco
All Mitsubishi Electric Pre-Plumbed Slimline Cylinders now have the Intaeco Duco compact filter factory fitted
on the heat pump return pipework which is common to both heating and hot water zones. This has been done
following feedback from our installers and in an effort to ensure that every cylinder and Ecodan
®
combination is
adequately protected against ferrous and non-ferrous material. Periodic servicing of this filter in accordance with
the manufacturer’s recommendations is strongly advised to ensure there are no restrictions to the flow rate.
Full technical details on this product can be found in the accompanying manual.
Zone Valves
All cylinders come with two pre-installed Honeywell spring return two port valves, on all models there is one
heating valve. If a second heating zone is required then an accessory pack may be purchased separately which
will ensure that installing a second heating zone is simple, all models also come with a hot water valve.
25
Pre-Plumbed Slimline Cylinder Installation Manual
Содержание Ecodan PUHZ-HW140VHA-BS
Страница 2: ......
