Filling The Water Heater; Co 2 Adjustment - andrews CWH30/100 Installation Manual, Operation And Maintenance Manual

SECTION 5
FILLING THE
WATER HEATER
COMMISSIONING
CO
ADJUSTMENT
Fig. 12
Measuring point
32
INSTRUCTIONS FOR COMMISSIONING
1. Check that the tank drain tap is closed.
2. Check that the return valve in the 28mm pipe (close to the drain tap) is open.
3. Open the main water tap and then all warm water drainage points, so that air present
in the installation and water heater can escape.
4. Fill the water heater by turning on the cold water supply tap. The water heater is full
once water is flowing out of all the warm water drainage points.
WARNING: IMPORTANT LPG NOTICE
To commission on Propane turn the high setting screw completely clockwise
on each burner before starting the heater. Then start up each heater and turn
the high setting screw anti-clockwise until the burner ignites, then proceed
as per the following instructions.
1. Before the water heater can be used it must be checked that:
• the water heater is completely full of water
• the gas pipes have been purged
• the electricity supply to the appliance is switched on
• the phase and neutral are correctly connected to the appliance
2. Open the appliance's gas tap.
3. Switch the electricity on with the power switch on the control panel.
The water heater now searches for what burner modules are present. When these are
detected the green LED for the corresponding burner module begins to flash. When all
burner modules have been detected they are started up one by one. When the burner
module is operational the green LED is lit permanently.
2
Table 1. CO percentage
2
Gas Type
Natural Gas
Propane
The correct proportion of gas and air
can be controlled based on the CO
percentage in the flue gasses. This
control needs to be done at full load
and low load. Every burner module
has a CO measuring point for the
2
measurement, see Fig. 9. Table 1
shows the value of the CO
percentage at full load and low load.
Full load
8.8%
9.8%
2
2
Low load
8.3%
9.2%