4.
Installation and commencement of operation
Before starting any work on the pump/motor make sure that the electric supply has been switched off and that it can
not be accidentally switched on.
Before installing and starting please check the pump for possible damages (i.e. during transport) to prevent personal
injury by electrical shock.
The pump must be installed in a horizontal position.
For best performance the dimension of the inlet-pipe (suction-hose or –pipe) must be min. 1” (25mm) and outlet (pressure-hose or –pipe)
min. ¾” (20mm). To avoid friction loss we recommend use the same dimensions for inlet and outlet.
Before starting the pump body must be filled up with water. To avoid any damages of the pump hydraulics and seals, the pump must not
run dry! For avoiding airlocks the suction-hose/-pipe should be installed with a gradient of 2% up to the pump.
Using a foot- valve (non-return valve) with strainer is recommended for the jet pumps and a matter of
urgent necessity
for booster kits
.
In addition the suction hose/ -pipe should be fitted with a strainer with 2mm maximum particles size. Do not install additional fine filters,
water meters etc. in the suction line of the pump! These components are unnecessary flow resistance; especially with fine filters there is a
risk that they become clogged and cause damage to the pump. The strainer on the intake (preferably floating withdrawal) is sufficient for the
protection of the pump! If a fine filter is required, it may be installed in the pressure line. Here then even a backwash fine filter should be
used. This facilitates the regular filter cleaning.
Remark: Increasing the suction pipe length will decreasing the pump performance.
When suction – and pressure hose or -pipe are fitted and are airtight, the pump can be filled with water. Therefore remove the plug and fill
the pump with water. Filling should be done carefully to the outlet (pressure) – connection or filling to the connection at the top of the pump-
body. Tighten the valve using fingers only. Also fill the sucking hose/ -pipe with water for best performance.
The connection on the suction side (inlet) must be absolutely airtight. Otherwise the pump will not build up a vacuum which is necessary for
priming. A hose should be a vacuum type. Depending on the length of the suction hose, the intake time may be a few minutes. If the pump
does not deliver even after approx. 3-5 minutes, this may be due to the following reasons:
-
There is still air in the pump and they must be completely filled again.
-
The suction line is leaking and the pump is drawing air.
-
The suction screen is clogged.
-
The suction hose is kinked.
-
The maximum suction height of 8.5 m has been exceeded.
5.
Service / Maintenance
Always disconnect from power before servicing!
Service and repair at electrical parts of the pump (cable, motor) has to be done by authorized service- companies
or producer.
Check the air pressure (1.5 bar) in the membrane vessel at least every three months and, if necessary, set it to 0.2 - 0.3 bar below the switch-
on pressure.
If the mechanical seal is damaged (dry- running and/or pumping abrasive parts) water will leak between pump- body and motor. To replace
this seal the 6 screws and the pump- body must be removed, impeller turned off/locking the shaft at the fan side). Replaced the seal and the
O-ring of the pump- body and assemble all parts in reverse order.
In case of very low temperatures and in any case before the first frost the pump must be removed from water. Empty the pump and store it in
a place where it is protected from frost.
For the purpose of a repair, service kits and service tools are available on request. You will find a typical overview about our service
partners at www.zehnder-pumpen.de.
We explicitly mention that spare parts and accessories which are not delivered and checked by Zehnder are not permitted. The built in and
use of such products may negatively affect the constructive set properties under these circumstances. For damages which arise by using of
non-original spare parts and accessories, Zehnder will refuse any liability and warranty. For faults which you cannot repair by yourself you
should contact our customer service or a qualified person.
6.
Warranty
This pump carries a 24 month manufacturer warranty. On the vessel including the membrane from HMP-P, we assume the warranty of 4
years. The warranty period begins with the date of purchase by the end user. Proof of purchase should be retained. Within this period we will
remove all kind of shortcoming due to failures of material or assembling. It is up to us either to repair or to replace the pump.
This warranty does not cover damage cause by improper use or wear and tear (mechanical seal, diaphragm, at booster kits). Also, there will
be no warranty given in case of unauthorized repair of the pump. Consequential damages caused by failing of the pump are not covered by
the manufacturer.
14
CAUTION
