Strebel S-CB+ Series, Installation Operating & Maintenance Manual

Page: 101 / 125

S-CB
+
Boiler Range Manual
101
15 PUTTING THE BOILER OUT OF OPERATION
It is recommended to have the boiler operational all year round to prevent any frost damage during the winter
and/or rotating parts getting jammed during other times of the year (built in boiler safety features).
15.1 Out of operation: on/off function
To be used when the appliance must be put out of operation for a long period because of a defect or another safety
risk.
Act as follows:

Disconnect or switch off the room thermostat and/or other external controllers from the boiler. The CH
pump and fan will stop after a short time.

Switch off the boiler by pressing the [ON/OFF] button for six seconds.

Make sure that the following display screen is visible.
Display message B o i l e r o f f
Properties of the ‘off’ function:

The keys do NOT respond and the menu is NOT accessible.

The burner does NOT respond to an external heat demand.

The boiler CAN, however, be switched on again by pressing the [ON/OFF] button.

Pumps, fans and cascade (if applicable) are operational, and so are both recirculation protection (if applic-
able) and frost protection.

NOTICE: Pump 3 (CH pump) is switched OFF, but this is NOT the case when the boiler is in a cascade.

To reactivate the boiler, switch on the burner by pressing [ON/OFF] for six seconds again.
The frost protection module can still activate the burner.
To prevent this, switch off this protection or put the boiler in ‘power off’ mode.
15.2 Out of operation: power off
To assure that the boiler cannot become active at all anymore, power should be cut off completely.
Act as follows:

Disconnect or switch off the room thermostat and/or other external controllers from the boiler. The CH
pump and fan will stop after a short time.

Switch off the boiler by pressing the [ON/OFF] button for six seconds.

Make sure that the following display screen is visible.
Display message B o i l e r o f f

Switch off the electrical power supply of the boiler (remove connection from the wall socket, or switch off
the main power).

Close the gas valve / gas supply.

In case of possible frost damage: drain both the boiler and the heating system.
NOTICE: Before starting to drain the boiler, first start draining the heating system and subsequently open also the
two drains of the boiler.