Buderus 800-24 Installation And Servicing Instructions page 23

2.1.2 Preparing the automatic air release valve
Open the protective cap on the automatic air release valve
one full turn (fig. 27).
Should the air purging operation cause the pressure to
drop below minimum, top up water.
2.1.3 Filling the hot water reservoir
Open the cold water inlet on the service valve.
Open the hot water valve until a full jet of water is flowing.
2.1.4 Filling the syphon with water
Pull the hose from the condensate plate (fig. 28, item1).
Fill the syphon with water.
Fit the hose to the condensate plate.
2.1.5 Checking for leaks
Disconnect the system from power supply.
Check all sections of gas pipework and connections for
signs of leaks before starting up system for the first time.
If a leak is detected during tightness testing, use an
approved leak detector to check all connections for
possible escapes.
The product must be certified as a gas leak-testing agent.
DO NOT allow the product to come into contact with elec-
trical wiring.
2.1.6 Purging air from the gas supply pipe
Loosen the screw plug on the gas connection and air
purging test nipple on Honeywell gas units two turns
(fig. 29, item 1), fully unscrew the plug on SIT gas units
(fig. 30, item 1) and fit the hose.
Purge system and appliance as per relevent procedures,
IGE/UP/1b. Ensuring all safety requirments are met.
Subject to modifications resulting from technical improvements !
Installation and servicing instructions condensing gas boiler 800 - 24/29/43/60 and 800 - 24T25/29T25 H/V • edition 02/2006
Initial start-up
fig. 27 Automatic air release valve
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3 2
4
3
5
6
4
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24 VAC 5
9
- max 6 VA
0
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24 VAC
11 6
12
fig. 28 Filling the syphon with water
fig. 29 Purging the gas supply pipe (Honeywell gas units)
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Buderus • http://buderus-domestic.co.uk
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