33
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
WATER CIRCULATION SYSTEM
1. With the system cold, check that the initial pressure is
correct to the system design requirements.
For pre-pressurised systems, this should be 1.0 bar.
2. With the system hot, examine all water connections for
soundness. The system pressure will increase with
temperature rise but should not exceed 2.5 bar.
3. With the system still hot, turn off the gas, water and
electricity supplies to the boiler and drain down to
complete the flushing process.
Note.
A flushing solution should be used during the flushing
procedure. Flushing solutions: Fernox Superfloc, Sentinel
X300 (new systems) or X400 (existing systems).
Refer to Section
1.17
4. Refill and vent the system, add inhibitor.
Refer to Section
1.15
Clear all air locks and again check for water soundness.
5. Reset the system initial pressure to the design
requirement.
6. Balance the system.
Refer to Section
1.16
7. Check the condensate drain for leaks and check that it is
discharging correctly.
8. Finally, set the controls to the User’s requirements.
Note
The pump will operate briefly as a self-check once
every 24 hours in the absence of any system demand.
WATER TEMPERATURES
Temperatures can be selected using the Temperature Knob
(A)
Temperature Knob Setting
CH Flow Temp
o
C
Max
80
Min
30
2.28 GENERAL CHECKS - WATER CIRCULATION
2.29 RESTART PROCEDURE
If an L code is shown on the display then the boiler can be restarted by pressing the Restart button (E).
Legend
A. Temperature Knob
B. Mode Button
C. Boiler Status Display
D. Burner On indicator
E. Restart Button
G. System Pressure Gauge
1
0
2
3
4
bar
C
A
B
D
N
E
G