Viessmann VITODENS 200-W WB2B Series Start-Up/Service Instructions page 21

Steps
(continued)
S
ervice
Fig. 13
B Siphon trap
C Flexible discharge tubing
D Discharge tube
S
ervice
19. Check condensate drain
1. Check that condensate can drain
freely at the siphon trap B.
2. If necessary clean siphon trap B by
removing retaining clip A and
siphon trap B.
3. After cleaning the siphon trap B, fill
it with water, re-attach it and secure
with retaining clip A.
B
C
D
20. Check neutralization unit (if applicable)
1. Check the pH value of the
condensate with pH measuring strip.
If the pH value is less than 6.5,
replace granulate.
2. If contaminated:
Rinse neutralization unit with tap
water.
3. Add granulate as marked.
Initial Start-up and Service
IMPORTANT
If the condensate does not drain freely,
condensate will accumulate in bottom
part of boiler resulting in a burner
shut-down (fault message).
Installation Instructions
Neutralization Unit
(if applicable)
IMPORTANT
pH measuring strip must be field
supplied.
IMPORTANT
The granulate is consumed as it
neutralizes the condensate. The red
marking indicates the min. filling level.
Installation Instructions
Neutralization Unit
Accessory
21