Valve Leak Test - Viessmann Vitocrossal 200 CM2 Series Installation Instructions Manual

Vitocrossal 200 CM2 Installation Instructions
Gas Connections
Legend
A Manual test firing valve
B Gas Valve
C O-ring
D Gas valve flange
E Mounting screws
F Nipple
G Manual gas shutoff valve
H Nipple (field supplied)
I Ground joint union (recommended) (field supplied)
WARNING
Escaped gas may lead to an explosion, which could
cause severe injuries or property damage.
(continued)
1. Refer to current CAN/CSA B149.1 and .2 or National
Fuel Gas Code ANSI Z223.1/NFPA 54, as well as
local codes for gas piping requirements and sizing.
Pipe size to the boiler must be determined based on:
- pipe length
- number of fittings
- type of gas
- maximum input requirements of all
gas appliances in the residence.
IMPORTANT
Design piping layout in such a way that piping does not
interfere with serviceable components.
2. Before connecting boiler to gas line, install ground
joint union, capped drip leg and a manual equipment
shutoff valve. Valves must be listed by a nationally
recognized testing agency. Make boiler gas connection
as shown.
3. Perform gas piping pressure test as described in the
following subsection.
IMPORTANT
Max. gas supply pressure: 14 "w.c.
4. Identify shutoff valves as such with a tab and
familiarize operator/ultimate owner of boiler with
these valves.
See Vitocrossal 200 CM2 Service Instructions
for applicable system coding information.

Valve leak test

This a test for checking the leak tightness of the valve
and flange connections. It is recommended that this test
be included in the scheduled inspection and maintenance
procedures.
IMPORTANT
This test should only be performed by a trained licensed
heating contractor.
1. Close the manual test firing valve A.
2. Open the manual gas shutoff valve G.
3. Leak test all connections with a certified leak detector.
4. Close the manual gas shutoff valve G.
5. Open the manual test firing valve A.
6. Repair any leaks if necessary.
Note: When required, install the supplied auxiliary low
gas pressure switch. Follow the low gas pressure
switch instructions.
Boiler
25