andrews MAXXflo EVO CWH 150/302 Installation And Maintenance Manual page 59

6.1.1.4. CONDENSATE PIPEWORK AND CONDENSATE TRAP
Inspect all joints in the internal condensate pipework (A) for leaks.
The internal pipes (A) should be clear, fl exible and no signs of any
cracking should be visible. Investigate closer any white coloured areas
that may appear on the internal condensate pipe work. Check its
connection to the heat exchanger and pipework for leaks.
Inspect all joints in the external condensate pipework (B) for leaks.
The lower bowl of each condensate trap (C) should be unscrewed,
examined and cleaned (see illustration below).
C
B
C
A
6.1.1.5. GAS RATE & COMBUSTION
The gas rate and combustion fl ue analysis must be carried out when the heater is operating at maximum loading.
See Section 5.2 for full details on how to check and adjust the CO
2
To check, re-establish gas and electricity supply and then operate each heat engine for at least 5 minutes. If adjust-
ment is required remove the cover over the throttle screw and turn anti-clockwise to increase CO or clockwise to
2
decrease.
CO
CO
_
2
2
+
MAKE ADJUSTMENTS IN 1/4 TURN STAGES AND WAIT ONE MINUTE BETWEEN EACH
ADJUSTMENT
Maintenance 59 MAXXfl o EVO 150/302