Perform Csd-1 Compliance Test - Dunkirk Helix VX-050 Installation, Operation & Maintenance Manual

4. See Figure 9-4 for location of Offset Screw on
modulating gas valve of various boiler models. T40
male Torx bit is necessary for removal of Offset Screw
cap and adjustment of Offset Screw.
5. Set boiler to High Power using System Test to confirm
combustion in High Fire (Step 2).
6.
Combustion setting is now complete.
A. Exit System Test mode by pushing Enter. High
Power will start flashing.
B. Scroll down to "OFF". Push Enter button "OFF"
stops flashing.
C. Push Menu button twice to escape Installer Manual.
Boiler returns to CH mode or DHW mode depending
on type of call for heat available.
7.
Check ignition quality 4 times with front jacket off.
Close internal manual gas valve for 5 seconds and then
re-open it. Boiler will go through post purge – prepurge
– ignition sequence. Reset boiler if boiler goes into
lockout.
8.
Check ignition quality 4 times with the front jacket on.
Close the external gas shutoff valve for 5 seconds
and re-open it. Boiler will go through a post purge –
prepurge – ignition sequence. Reset the boiler if boiler
goes into lockout.
9.6 Perform CSD-1 Compliance Test (see
paragraph 2.4 page 6)
Verify operation of boiler safety control operation with
regard to no flow conditions as follows:
1. Turn off boiler using boiler service switch.
2.
Disable primary boiler pump. Disconnect multi pin
connector J7 from control module. See figure 9-6.
3. Disable secondary system pumps attached to
system.
4.
Establish call for heat. Jump CH T-T terminals on
low voltage terminal block. Turn on boiler using
boiler service switch.
5.
Boiler will fire. Based on natural convection within
boiler, boiler will either:
A. Lockout A-06 "Safety Relay Error". Requires
manual reset of control module. Press reset
button on User interface. See 9.3 Program Boiler
Control.
OR
B. Shut off burner E40 "Return Water Temp". This
is a soft lockout. When water temperature drops
below limit, boiler will automatically refire then
Lockout A-06 requiring manual reset of control
module. Press Reset button on User Interface.
OR
C. Shut off burner E39 "Flue Temperature Sensor".
This is a soft lockout. When flue sensor drops
below limit, boiler will automatically refire then
Lockout A-06 requiring manual reset of control
module. Press Reset button on User Interface.
9 - START UP PROCEDURE
FIGURE 9-4 Offset Screw Location - Models
050/075/100/150/200 MBH
Located Under The
6. After safety operation is verified, turn off boiler via
service switch. Remove jumper in T-T. Replace J7
connector into control module, enable secondary
pump operation, turn service switch on and restart
system to verify operation. See figure 9-6 page 41.
7.
Verify field sourced external low water cutoff
(LWCO) is functional.
40
White Plastic
Offset Screw Is
Aluminum Cap
P/N# 240010618, Rev. E [07/2015]