Automatic Bleed Valves; Transit Bung; Y-Strainer - ESP Varimax I ASHP Installation And Operation Manual

These flexible hoses are available from ESP as part of an Installation Pack
or individually.

6.4 Automatic bleed valves

Make sure that you fit automatic bleed valves (air vent)s at high points in
the system. The unit will shut down if air is in the system because the
water flow switch will recognize air in the system as no water flow and a
system alarm/protection code will appear on the unit controller. The
Error Message "Flow Level" will appear on the controller display.

6.5 Transit Bung

This bung must be removed and replaced with a drain-off- cock (DOC).
There must also be a DOC at any lower point in the system, to allow for
effective drain-down of the system as and when required. Please note
that, if the system is to be left idle for a long period in winter, the system
should be drained down. You should fit full flow lever valves on the flow
and return to the unit so that the unit can be quickly and effectively
drained down where required for maintenance.

6.6 Y-Strainer

Spirotrap Strainer
13 of 52 www.esavep.com
V 1.7
The unit is supplied with a transit bung beside the
flow/return pipes.
Transit Bung
You must fit a Y-strainer on in-line on the return pipe to
the unit. This is normally fitted in an external location
and must have a full flow lever valve side either side of
the strainer to minimise glycol loss during maintenance.
Due to the mix of metals on many systems it is both
advisable and preferable to install a Spirotrap ® rather
than the minimum standard Y strainer. Failure to fit a
PASRW040-D-BP